Mitsubishi Electric e-series EAHV-P900YA, EACV-P900YA air-cooled chilling unit Service Handbook

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Safety Precautions

Thoroughly read the following safety precautions prior to use.

Observe these precautions carefully to ensure safety.

WARNING

Indicates a risk of death or serious injury

CAUTION

Indicates a risk of injury or structural damage

IMPORTANT

Indicates a risk of damage to the unit or other components in the system

All electric work must be performed by personnel certified by Mitsubishi Electric.

General

WARNING

Do not use refrigerant other than the type indicated in the manuals provided with the unit and on the nameplate.

Doing so may cause the unit or pipes to burst, or result in explosion or fire during use, during repair, or at the time of disposal of the unit.

It may also be in violation of applicable laws.

MITSUBISHI ELECTRIC CORPORATION cannot be held responsible for malfunctions or accidents resulting from the use of the wrong type of refrigerant.

Do not install the unit in a place where large amounts of oil, steam, organic solvents, or corrosive gases, such as sulfuric gas, are present or where acidic/alkaline solutions or sprays containing sulfur are used frequently.

These substances can compromise the performance of the unit or cause certain components of the unit to corrode, which can result in refrigerant leakage, water leakage, injury, electric shock, malfunctions, smoke, or fire.

Do not try to defeat the safety features of the unit or make unauthorized setting changes.

Forcing the unit to operate the unit by defeating the safety features of the devices such as the pressure switch or the temperature switch, making unauthorized changes to the switch settings, or using accessories other than the ones recommended by Mitsubishi Electric may result in smoke, fire, or explosion.

To reduce the risk of fire or explosion, do not use volatile or flammable substances as a heat carrier.

To reduce the risk of burns or electric shock, do not touch exposed pipes and wires.

To reduce the risk of shorting, current leakage, electric shock, malfunctions, smoke, or fire, do not splash water on electric parts.

To reduce the risk of electric shock, malfunctions, smoke or fire, do not operate the switches/buttons or touch other electrical parts with wet hands.

To reduce the risk of electric shock and injury from the fan or other rotating parts, stop the operation and turn off the main power before cleaning, maintaining, or inspecting the unit.

To reduce the risk of burns or frost bites, do not touch the refrigerant pipes or refrigerant circuit components with bare hands during and immediately after operation.

Before cleaning the unit, switch off the power.

(Unplug the unit, if it is plugged in.)

To reduce the risk of injury, keep children away while installing, inspecting, or repairing the unit.

Children should be supervised to ensure that they do not play with the appliance.

This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety.

Keep the space well ventilated. Refrigerant can displace air and cause oxygen starvation.

If leaked refrigerant comes in contact with a heat source, toxic gas may be generated.

Always replace a fuse with one with the correct current rating.

The use of improperly rated fuses or a substitution of fuses with steel or copper wire may result in fire or explosion.

If any abnormality (e.g., burning smell) is noticed, stop the operation, turn off the power switch, and consult your dealer.

Continuing the operation may result in electric shock, malfunctions, or fire.

Properly install all required covers and panels on the terminal box and control box to keep moisture and dust out.

Dust accumulation and water may result in electric shock, smoke, or fire.

Consult an authorized agency for the proper disposal of the unit.

Refrigerant oil and refrigerant that may be left in the unit pose a risk of fire, explosion, or environmental pollution.

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CAUTION

To reduce the risk of fire or explosion, do not place flammable materials or use flammable sprays around the unit.

Do not operate the unit without panels and safety guards properly installed.

To reduce the risk of injury, do not sit, stand, or place objects on the unit.

Do not connect the makeup water pipe directly to the potable water pipe. Use a cistern tank between them.

Connecting these pipes directly may cause the water in the unit to migrate into the potable water and cause health problems.

To reduce the risk of adverse effects on plants and animals, do not place them where they are directly exposed to discharge air from the unit.

Do not install the unit on or over things that are vulnerable to water damage.

Condensation may drip from the unit.

The model of heat pump unit described in this manual is not intended for use to preserve food, animals, plants, precision instruments, or art work.

To reduce the risk of injury, do not touch the heat exchanger fins or sharp edges of components with bare hands.

Do not place a container filled with water on the unit.

If water spills on the unit, it may result in shorting, current leakage, electric shock, malfunction, smoke, or fire.

Always wear protective gears when touching electrical components on the unit.

Several minutes after the power is switched off, residual voltage may still cause electric shock.

To reduce the risk of injury, do not insert fingers or foreign objects into air inlet/outlet grills.

To reduce the risk of injury, wear protective gear when working on the unit.

Do not release refrigerant into the atmosphere. Collect and reuse the refrigerant, or have it properly disposed of by an authorized agency.

Refrigerant poses environmental hazards if released into the air.

Transportation

WARNING

Lift the unit by placing the slings at designated locations. Support the outdoor unit securely at four points to keep it from slipping and sliding.

If the unit is not properly supported, it may fall and cause personal injury.

CAUTION

To reduce the risk of injury, do not carry the product by the PP bands that are used on some packages.

To reduce the risk of injury, products weighing 20 kg or more should be carried by two or more people.

To prevent environmental pollution, dispose of brine in the unit and cleaning solutions according to the local regulations.

It is punishable by law not to dispose of them according to the applicable laws.

The water heated by the heat pump is not suitable for use as drinking water or for cooking.

It may cause health problems or degrade food.

In areas where temperature drops to freezing during the periods of non-use, blow the water out of the pipes or fill the pipes with anti-freeze solution.

Not doing so may cause the water to freeze, resulting in burst pipes and damage to the unit or the furnishings.

In areas where temperature drops to freezing, use an antifreeze circuit and leave the main power turned on to prevent the water in the water circuit from freezing and damaging the unit or causing water leakage and resultant damage to the furnishings.

Use clean tap water.

The use of acidic or alkaline water or water high in chlorine may corrode the unit or the pipes, causing water leakage and resultant damage to the furnishings.

In areas where temperature can drop low enough to cause the water in the pipes to freeze, operate the unit often enough to prevent the water from freezing.

Frozen water in the water circuit may cause the water to freeze, resulting in burst pipes and damage to the unit or the furnishings.

Periodically inspect and clean the water circuit.

Dirty water circuit may compromise the units performance or corrodes the unit or cause water leakage and resultant damage to the furnishings.

Ensure that the flow rate of the feed-water is within the permitted range.

If the flow rate exceeds the permitted range, the unit may become damaged due to corrosion.

Furniture may become wet due to water leaks.

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Installation

WARNING

Do not install the unit where there is a risk of leaking flammable gas.

If flammable gas accumulates around the unit, it may ignite and cause a fire or explosion.

Properly dispose of the packing materials.

Plastic bags pose suffocation hazard to children.

The unit should be installed only by personnel certified by Mitsubishi Electric according to the instructions detailed in the Installation/Operation Manual.

Improper installation may result in refrigerant leakage, water leakage, injury, electric shock, or fire.

Periodically check the installation base for damage.

If the unit is left on a damaged base, it may fall and cause injury.

Remove packing materials from the unit before operating the unit. Note that some accessories may be taped to the unit. Properly install all accessories that are required.

Failing to remove the packing materials or failing to install required accessories may result in refrigerant leakage, oxygen starvation, smoke, or fire.

CAUTION

Do not install the unit on or over things that are vulnerable to water damage.

When the indoor humidity exceeds 80% or if the drain water outlet becomes clogged, condensation may drip from the indoor unit onto the ceiling or floor.

Pipe installation

WARNING

To prevent explosion, do not heat the unit with refrigerant gas in the refrigerant circuit.

Consult your dealer and take appropriate measures to safeguard against refrigerant leakage and resultant oxygen starvation. An installation of a refrigerant gas detector is recommended.

Any additional parts must be installed by qualified personnel.

Only use the parts specified by Mitsubishi Electric.

Take appropriate safety measures against wind gusts and earthquakes to prevent the unit from toppling over and causing injury.

Be sure to install the unit horizontally, using a level.

If the unit is installed at an angle, it may fall and cause injury or cause water leakage.

The unit should be installed on a surface that is strong enough to support its weight.

As an anti-freeze, use ethylene glycol or propylene glycol diluted to the specified concentration.

The use of other types of anti-freeze solution may cause corrosion and resultant water leakage. The use of flammable anti-freeze may cause fire or explosion.

All drainage work should be performed by the dealer or qualified personnel according to the instructions detailed in the Installation Manual.

Improper drainage work may cause rain water or drain water to enter the buildings and damage the furnishings.

Check for refrigerant leakage at the completion of installation.

If leaked refrigerant comes in contact with a heat source, toxic gas may be generated.

CAUTION

Check that no substance other than the specified refrigerant (R410A) is present in the refrigerant circuit.

Infiltration of other substances may cause the pressure to rise abnormally high and cause the pipes to explode.

To keep the ceiling and floor from getting wet due to condensation, properly insulate the pipes.

Piping work should be performed by the dealer or qualified personnel according to the instructions detailed in the Installation Manual.

Improper piping work may cause water leakage and damage the furnishings.

To keep the ceiling and floor from getting wet due to condensation, properly insulate the pipes.

Electrical wiring

To reduce the risk of wire breakage, overheating, smoke, and fire, keep undue force from being applied to the wires.

Properly secure the cables in place and provide adequate slack in the cables so as not to stress the terminals.

Improperly connected cables may break, overheat, and cause smoke or fire.

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To reduce the risk of injury or electric shock, switch off the main power before performing electrical work.

All electric work must be performed by a qualified electrician according to the local regulations, standards, and the instructions detailed in the Installation Manual.

Capacity shortage to the power supply circuit or improper installation may result in malfunction, electric shock, smoke, or fire.

To reduce the risk of electric shock, smoke, or fire, install an inverter circuit breaker on the power supply to each unit.

Use properly rated breakers and fuses (inverter breaker,

Local Switch <Switch + Type-B fuse>, or no-fuse breaker).

The use of improperly rated breakers may result in malfunctions or fire.

CAUTION

To reduce the risk of current leakage, wire breakage, smoke, or fire, keep the wiring out of contact with the refrigerant pipes and other parts, especially sharp edges.

Transportation and repairs

WARNING

The unit should be moved, disassembled, or repaired only by qualified personnel. Do not alter or modify the unit.

Improper repair or unauthorized modifications may result in refrigerant leakage, water leakage, injury, electric shock, or fire.

To reduce the risk of current leakage, overheating, smoke, or fire, use properly rated cables with adequate current carrying capacity.

Keep the unsheathed part of cables inside the terminal block.

If unsheathed part of the cables come in contact with each other, electric shock, smoke, or fire may result.

Proper grounding must be provided by a licensed electrician. Do not connect the grounding wire to a gas pipe, water pipe, lightning rod, or telephone wire.

Improper grounding may result in electric shock, smoke, fire, or malfunction due to electrical noise interference.

To reduce the risk of electric shock, shorting, or malfunctions, keep wire pieces and sheath shavings out of the terminal block.

After disassembling the unit or making repairs, replace all components as they were.

Failing to replace all components may result in injury, electric shock, or fire.

If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified persons in order to avoid a hazard.

CAUTION

To reduce the risk of shorting, electric shock, fire, or malfunction, do not touch the circuit board with tools or with your hands, and do not allow dust to accumulate on the circuit board.

IMPORTANT

To avoid damage to the unit, use appropriate tools to install, inspect, or repair the unit.

To reduce the risk or malfunction, turn on the power at least

12 hours before starting operation, and leave the power turned on throughout the operating season.

Recover all refrigerant from the unit.

It is punishable by law to release refrigerant into the atmosphere.

Do not unnecessarily change the switch settings or touch other parts in the refrigerant circuit.

Doing so may change the operation mode or damage the unit.

To reduce the risk of malfunctions, use the unit within its operating range.

Do not switch on or off the main power in a cycle of shorter than 10 minutes.

Short-cycling the compressor may damage the compressor.

To maintain optimum performance and reduce the risk of malfunction, keep the air pathway clear.

To reduce the risk of both the breaker on the product side and the upstream breaker from tripping and causing problems, split the power supply system or provide protection coordination between the earth leakage breaker and no-fuse breaker.

When servicing the refrigerant, open and close the check joint using two spanners, as there is the risk of refrigerant leaking due to damaged piping.

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Please build the water circuit so that it is a closed system.

Do not use water directly for showers or other applications.

Do not allow other heat source water to mix with the water circuit.

To ensure proper operation of the unit, periodically check for proper concentration of anti-freeze.

Inadequate concentration of anti-freeze may compromise the performance of the unit or cause the unit to abnormally stop.

Take appropriate measures against electrical noise interference when installing the air conditioners in hospitals or facilities with radio communication capabilities.

Inverter, high-frequency medical, or wireless communication equipment as well as power generators may cause the air conditioning system to malfunction. Air conditioning system may also adversely affect the operation of these types of equipment by creating electrical noise.

Check the water system, using a relevant manual as a reference.

Using the system that does not meet the standards (including water quality and water flow rate) may cause the water pipes to corrode.

To reduce the risk of power capacity shortage, always use a dedicated power supply circuit.

Have a backup system, if failure of the unit has a potential for causing significant problems or damages.

This appliance is intended to be used by expert or trained users in shops, in light industry and on farms, or for commercial use by lay persons.

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CONTENTS

I

Read Before Servicing

[1] Read Before Servicing.............................................................................................................. 3

[2] Necessary Tools and Materials ................................................................................................ 4

[3] Brazing...................................................................................................................................... 5

[4] Air Tightness Test..................................................................................................................... 6

[5] Vacuum Drying (Evacuation) .................................................................................................... 7

[6] Refrigerant Charging ................................................................................................................ 8

[7] Remedies to be taken in case of a Refrigerant Leak................................................................ 8

[8] Characteristics of the Conventional and the New Refrigerants ................................................ 9

[9] Notes on Refrigerating Machine Oil........................................................................................ 10

II

Restrictions

[1] System Configuration ............................................................................................................. 13

[2] Types and Maximum allowable Length of Cables .................................................................. 14

[3] Electrical Wiring Installation .................................................................................................... 15

[4] Sample Installation ................................................................................................................. 18

[5] Switch Types and the Factory Settings .................................................................................. 19

[6] Configuring the Settings ......................................................................................................... 20

[7] Water Pipe Installation............................................................................................................ 25

III

Unit Components

[1] Unit Components and Refrigerant Circuit ............................................................................... 35

[2] Control Box of the Unit............................................................................................................ 39

[3] Unit Circuit Board.................................................................................................................... 41

IV

Remote Controller

[1] Using the Remote Controller .................................................................................................. 49

[2] Function Settings .................................................................................................................... 54

V

Electrical Wiring Diagram

[1] Electrical Wiring Diagram ....................................................................................................... 59

VI

Refrigerant Circuit

[1] Refrigerant Circuit Diagram .................................................................................................... 65

[2] Principal Parts and Functions ................................................................................................. 66

VII

Control

[1] Functions and Factory Settings of the Dipswitches ................................................................ 71

[2] Operating characteristics and Control Capabilities ................................................................. 85

VIII

Test Run Mode

[1] Items to be checked before a Test Run .................................................................................. 97

[2] Test Run Method .................................................................................................................... 99

[3] Operating the Unit................................................................................................................. 100

[4] Refrigerant ............................................................................................................................ 101

[5] Symptoms that do not Signify Problems ............................................................................... 101

[6] Standard operating characteristics (Reference data) ........................................................... 101

IX

Troubleshooting

[1] Maintenance items................................................................................................................ 105

[2] Troubleshooting .................................................................................................................... 108

[3] Troubleshooting Principal Parts ............................................................................................ 113

[4] Refrigerant Leak ................................................................................................................... 128

[5] Parts Replacement Procedures ............................................................................................ 129

X

Attachments

[1] R410A saturation temperature table ..................................................................................... 141

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CONTENTS

HWE14170 GB


I

Read Before Servicing

[1] Read Before Servicing ....................................................................................................... 3

[2] Necessary Tools and Materials.......................................................................................... 4

[3] Brazing............................................................................................................................... 5

[4] Air Tightness Test .............................................................................................................. 6

[5] Vacuum Drying (Evacuation) ............................................................................................. 7

[6] Refrigerant Charging.......................................................................................................... 8

[7] Remedies to be taken in case of a Refrigerant Leak ......................................................... 8

[8] Characteristics of the Conventional and the New Refrigerants ......................................... 9

[9] Notes on Refrigerating Machine Oil ................................................................................. 10

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Read Before Servicing ]

I

Read Before Servicing

[1] Read Before Servicing

1. Check the type of refrigerant used in the system to be serviced.

Refrigerant Type

Air-coold Chilling Unit e-series EAHV/EACV-P900YA: R410A

2. Check the symptoms exhibited by the unit to be serviced.

Refer to this service handbook for symptoms relating to the refrigerant cycle.

3. Thoroughly read the safety precautions at the beginning of this manual.

4. Preparing necessary tools: Prepare a set of tools to be used exclusively with each type of refrigerant.

Refer to "Necessary Tools and Materials" for information on the use of tools.(page 4)

5. If there is a leak of gaseous refrigerant and the remaining refrigerant is exposed to an open flame, a poisonous gas hydrofluoric acid may form. Keep workplace well ventilated.

CAUTION



Install new pipes immediately after removing old ones to keep moisture out of the refrigerant circuit.



The use of refrigerant that contains chloride, such as R22, will cause the refrigerating machine oil to deteriorate.

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[2] Necessary Tools and Materials

Prepare the following tools and materials necessary for servicing the unit.

Tools for use with R410A (Adaptability of tools that are for use with R22 or R407C)

1. To be used exclusively with R410A (not to be used if used with R22 or R407C)

Tools/Materials

Gauge Manifold

Use

Evacuation and refrigerant charging

Notes

Higher than 4.82MPa on the highpressure side

Charging Hose

Refrigerant Recovery Cylinder

Refrigerant Cylinder

Evacuation and refrigerant charging

Refrigerant recovery

Refrigerant charging The refrigerant type is indicated. The cylinder is Gray

Charging Port on the Refrigerant Cylinder Refrigerant charging

2. Tools and materials that may be used with R410A with some restrictions

Tools/Materials

Gas Leak Detector

Vacuum Pump

Refrigerant Recovery Equipment

Vacuum drying

Use

Gas leak detection

Refrigerant recovery

Notes

The ones for use with HFC refrigerant may be used.

May be used if a check valve adapter is attached.

May be used if compatible with

R410A.

3. Tools and materials that are used with R22 or R407C that may also be used with R410A

Tools/Materials

Vacuum Pump with a Check Valve

Bender

Torque Wrench

Pipe Cutter

Welder and Nitrogen Cylinder

Refrigerant Charging Meter

Vacuum Gauge

Vacuum drying

Use

Bending pipes

Tightening water pipes

Cutting pipes

Welding pipes

Refrigerant charging

Vacuum level check

Notes

4. Tools and materials that must not be used with R410A

Tools/Materials

Charging Cylinder

Use

Refrigerant charging

Notes

Prohibited to use

Tools for R410A must be handled with special care to keep moisture and dust from infiltrating the cycle.

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[3] Brazing

No changes have been made in the brazing procedures. Perform brazing with special care to keep foreign objects (such as oxide scale, water, and dust) out of the refrigerant system.

Example: Inside the brazed connection

Use of oxidized solder for brazing Use of non-oxidized solder for brazing

1. Items to be strictly observed



Do not conduct refrigerant piping work outdoors if raining.



Use non-oxidized solder.



Use a brazing material (BCuP-3) that requires no flux when brazing between copper pipes or between a copper pipe and copper coupling.



If installed refrigerant pipes are not immediately connected to the equipment, then braze and seal both ends.

2. Reasons



The new refrigerating machine oil is 10 times as hygroscopic as the conventional oil and is more likely to cause unit failure if water infiltrates into the system.



Flux generally contains chloride. Residual flux in the refrigerant circuit will cause sludge to form.

3. Notes

Do not use commercially available antioxidants because they may cause the pipes to corrode or refrigerating machine oil to deteriorate.

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[4] Air Tightness Test

No changes have been made in the detection method. Note that a refrigerant leak detector for R22 will not detect an R410A leak.

Halide torch R22 leakage detector

1. Items to be strictly observed



Pressurize the equipment with nitrogen up to the design pressure (4.15MPa), and then judge the equipment's air tightness, taking temperature variations into account.



Refrigerant R410A must be charged in its liquid state (vs. gaseous state).

2. Reasons



Oxygen, if used for an air tightness test, poses a risk of explosion. (Only use nitrogen to check air tightness.)



Refrigerant R410A must be charged in its liquid state. If gaseous refrigerant in the cylinder is drawn out first, the composition of the remaining refrigerant in the cylinder will change and become unsuitable for use.

3. Notes

Procure a leak detector that is specifically designed to detect an HFC leak. A leak detector for R22 will not detect an

HFC(R410A) leak.

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[5] Vacuum Drying (Evacuation)

(Photo1) 15010H (Photo2) 14010

Recommended vacuum gauge:

ROBINAIR 14010 Thermistor Vacuum Gauge

1. Vacuum pump with a reverse-flow check valve (Photo1)

To prevent the vacuum pump oil from flowing into the refrigerant circuit during power OFF or power failure, use a vacuum pump with a reverse-flow check valve.

A reverse-flow check valve may also be added to the vacuum pump currently in use.

2. Standard of vacuum degree (Photo 2)

Use a vacuum pump that attains 0.5Torr(65Pa) or lower degree of vacuum after 5 minutes of operation, and connect it directly to the vacuum gauge. Use a pump well-maintained with an appropriate lubricant. A poorly maintained vacuum pump may not be able to attain the desired degree of vacuum.

3. Required precision of vacuum gauge

Use a vacuum gauge that registers a vacuum degree of 5Torr(650Pa) and measures at intervals of 1Torr(130Pa). (A recommended vacuum gauge is shown in Photo2.)

Do not use a commonly used gauge manifold because it cannot register a vacuum degree of 5Torr(650Pa).



After the degree of vacuum has reached 5Torr(650Pa), evacuate for an additional 1 hour. (A thorough vacuum drying removes moisture in the pipes.)



Verify that the vacuum degree has not risen by more than 1Torr(130Pa) 1hour after evacuation. A rise by less than

1Torr(130Pa) is acceptable.



If the vacuum is lost by more than 1Torr(130Pa), conduct evacuation, following the instructions in section 6. Special vacuum drying.

5. Procedures for stopping vacuum pump

To prevent the reverse flow of vacuum pump oil, open the relief valve on the vacuum pump side, or draw in air by loosening the charge hose, and then stop the operation.

The same procedures should be followed when stopping a vacuum pump with a reverse-flow check valve.

6. Special vacuum drying



When 5Torr(650Pa) or lower degree of vacuum cannot be attained after 3 hours of evacuation, it is likely that water has penetrated the system or that there is a leak.



If water infiltrates the system, break the vacuum with nitrogen. Pressurize the system with nitrogen gas to

0.5kgf/cm

2

G(0.05MPa) and evacuate again. Repeat this cycle of pressurizing and evacuation either until the degree of vacuum below 5Torr(650Pa) is attained or until the pressure stops rising.



Only use nitrogen gas for vacuum breaking. (The use of oxygen may result in an explosion.)

7. Notes



Apply a vacuum through the check joints on the low pressure sides.



Evacuating the system from the high-pressure side may damage the compressor.

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[6] Refrigerant Charging

Cylinder with a siphon Cylinder without a siphon

Cylinder

Cylinder color R410A is Pink.

Valve

Cylinder

Refrigerant charging in the liquid state

Valve liquid

Charge refrigerant through the check joint on the high-pressure side.

liquid

Charging refrigerant through the check joint on the low-pressure side will create reverse pressure, resulting in compressor malfunctions.

1. Reasons

R410A is a mixture of 2 refrigerants, each with a different evaporation temperature. Therefore, if the equipment is charged with R410A gas, then the refrigerant whose evaporation temperature is closest to the outside temperature is charged frist while the rest of refrigerants remain in the cylinder.

2. Notes

When using a cylinder with a siphon, refrigerant is charged in the liquid state without the need for turning it upside down. Check the type of the cylinder on the label before use.

[7] Remedies to be taken in case of a Refrigerant Leak

If the refrigerant leaks out, all of the remaining refrigerant must be replaced with a new charge to maintain the proper composition of the refrigerant. Repair the leak, and then charge the system with the specified amount of refrigerant (19 kg). (Charge refrigerant in the liquid state.)

Refer to "IX [4] Refrigerant Leak."(page 128)

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[8] Characteristics of the Conventional and the New Refrigerants

As with R22, the new refrigerant (R410A) is low in toxicity and chemically stable nonflammable refrigerant.

However, because the specific gravity of vapor refrigerant is greater than that of air, leaked refrigerant in a closed room will accumulate at the bottom of the room and may cause hypoxia.

If exposed to an open flame, refrigerant will generate poisonous gases. Do not perform installation or service work in a confined area.

Composition (wt%)

Type of Refrigerant

New Refrigerant (HFC type)

R410A

R32/R125

(50/50)

Pseudo-azeotropic

Refrigerant

R407C

R32/R125/R134a

(23/25/52)

Non-azeotropic

Refrigerant

Conventional Refrigerant (HCFC type)

R22

R22

(100)

Single Refrigerant

Chloride

Safety Class

Molecular Weight

Boiling Point (°C/°F)

Not included

A1/A1

72.6

-51.4/-60.5

1.557/226

Not included

A1/A1

86.2

-43.6/-46.4

0.9177/133

Included

A1

86.5

-40.8/-41.4

0.94/136 Steam Pressure

(25°C,MPa/77°F,psi) (gauge)

Saturated Steam Density

(25°C,kg/m

3

/77°F,psi)

Flammability

Ozone Depletion Coefficient (ODP)

*1

Global Warming Coefficient (GWP)

Refrigerant Charging Method

*2

Replenishment of Refrigerant after a Refrigerant

Leak

64.0

42.5

44.4

Nonflammable

0

Nonflammable

0

Nonflammable

0.055

2090 1774 1810



Refrigerant charging in the gaseous state

Available Available Available

*1 When CFC11 is used as a reference

*2 When CO

2

is used as a reference

The pressure in the system using R410A is 1.6 times as great as that in the system using R22.

Temperature (°C/°F)

-20/-4

0/32

20/68

40/104

60/140

65/149

R410A

MPa/psi

0.30/44

0.70/102

1.34/194

2.31/335

3.73/541

4.17/605

Saturation Pressure (gauge)

R407C

MPa/psi

0.18/26

0.47/68

0.94/136

1.44/209

2.43/354

2.74/399

R22

MPa/psi

0.14/20

0.40/58

0.81/117

1.44/209

2.33/338

2.60/377

HWE14170 - 9 GB


[

I


[9] Notes on Refrigerating Machine Oil

1. Refrigerating machine oil in the HFC refrigerant system

HFC type refrigerants use a refrigerating machine oil different from that used in the R22 system.

Note that the ester oil used in the system has properties that are different from commercially available ester oil.

Refrigerant Refrigerating machine oil

R407C Ester oil

2. Effects of contaminants

*1

Refrigerating machine oil used in the HFC system must be handled with special care to keep contaminants out.

The table below shows the effect of contaminants in the refrigerating machine oil on the refrigeration cycle.

3. The effects of contaminants in the refrigerating machine oil on the refrigeration cycle.

Cause

Water infiltration

Air infiltration

Infiltration of contaminants

Dust, dirt

Mineral oil etc.

Hydrolysis

Oil degradation

Symptoms

Frozen expansion valve and capillary tubes

Sludge formation and adhesion

Acid generation

Oxidization

Oil degradation

Burnt motor

Coppering of the orbiting scroll

Lock

Effects on the refrigerant cycle

Clogged expansion valve and capillary tubes

Poor cooling performance

Compressor overheat

Motor insulation failure

Burn-in on the orbiting scroll

Oxidization

Adhesion to expansion valve and capillary tubes

Infiltration of contaminants into the compressor

Clogged expansion valve, capillary tubes, and drier


Compressor overheat


Sludge formation and adhesion Clogged expansion valve and capillary tubes


Compressor overheat


*1. Contaminants is defined as moisture, air, processing oil, dust/dirt, wrong types of refrigerant, and refrigerating machine oil.

HWE14170 - 10 GB


II

Restrictions

[1] System Configuration....................................................................................................... 13

[2] Types and Maximum allowable Length of Cables ........................................................... 14

[3] Electrical Wiring Installation ............................................................................................. 15

[4] Sample Installation........................................................................................................... 18

[5] Switch Types and the Factory Settings............................................................................ 19

[6] Configuring the Settings................................................................................................... 20

[7] Water Pipe Installation ..................................................................................................... 25

HWE14170 - 11 GB


HWE14170 - 12 GB


[

II

Restrictions ]

II

Restrictions

[1] System Configuration

The system must be configured only by personnel certified by Mitsubishi Electric.

[1] Schematic Diagrams of Individual and Multiple Module Connection Systems

(1) Individual system

External temperature sensor

SUB

PCB

MAIN

PCB

Field-supplied dry contact switch/relay or remote controller

(PAR-W21MAA)

Refer to the sections "Switch Types and the Factory Settings" (page19) and

"System configuration procedures: Individual system" (page 22) for further details.

(2) Multiple module connection system (2-6 modules)

* A group of module that consists of one main module and up to 5 sub modules is operated collectively by connecting an external water temperature sensor and a dry contact switch/relay to the main module.

1 2 6

SUB

PCB

MAIN module

MAIN

PCB

SUB

PCB

SUB module

MAIN

PCB

SUB

PCB

SUB module

MAIN

PCB


(PAR-W21MAA)


M-NET line

Refer to the sections "Switch Types and the Factory Settings" (page19) and "System configuration procedures: Multiple module connection system" (page 23) for further details.

HWE14170 - 13 GB


[

II

Restrictions ]

[2] Types and Maximum allowable Length of Cables

(1) Notes

1) Have all electrical work performed by an authorized electrician according to the local regulations and instructions in this manual.

2) Install external transmission cables at least 5cm [1-31/32"] away from the power supply cable to avoid noise interference.

(Do not put the control cable and power supply cable in the same conduit tube.)

3) Provide grounding for the unit as required.

4) Run the cable from the electric box of the unit in such way that the box is accessible for servicing.

5) Do not connect power supply wiring to the terminal block for transmission line. Doing so will damage the electronic components on the terminal block.

6) Use 2-core shielded cables as transmission cables.

Use a separate 2-core control cable for each refrigerant system. Do not use a single multiple-core cable to connect units that belong to different refrigerant systems. The use of a multiple-core cable may result in signal transmission errors and malfunctions. unit unit unit unit unit

MA

MB

2-core shielded cable unit

MA

MB

2-core shielded cable

MA

MB multiplecore cable

MA

MB

MA

MB


MA

MB


MA

MB

MA

MB

(2) Control wiring

Different types of control wiring are used for different systems.

Types and maximum allowable length of cables

Control lines are categorized into 2 types: transmission line and remote controller line.

Use the appropriate type of cables and observe the maximum allowable length specified for a given system. If a given system has a long transmission line or if a noise source is located near the unit, place the unit away from the noise source to reduce noise interference.

HWE14170 - 14 GB


[

II

Restrictions ]

[3] Electrical Wiring Installation

1 Main Power Supply Wiring and Switch Capacity

Schematic Drawing of Wiring (Example)

A

: Switch (with current breaking capability)

B

: Current leakage breaker

C

: Unit

3N~380–415V

L

1

, L

2

, L

3

, N

B A

PE

Main power supply wire size, switch capacities, and system impedance

Model

EAHV/EACV-P900YA

Minimum wire thickness (mm

2

)

M a i n c a b l e

25

B r a n

c h G r o u

25 n d

Current leakage breaker

75 A 100 mA 0.1 sec. or less

C

C a

Local swtich (A) p a

75 c i t y F u s e

75

No-fuse breaker (A)

75

Max. Permissive

System Impedance

0.12 Ω

1. Use a dedicated power supply for each unit. Ensure that each unit is wired individually.

2. When installing wiring, consider ambient conditions (e.g., temperature).

3. The wire size is the minimum value for metal conduit wiring. If voltage drop is a problem, use a wire that is one size thicker.

Make sure the power-supply voltage does not drop more than 5%.

4. Specific wiring requirements should adhere to the wiring regulations of the region.

5. Power supply cords of appliances shall not be lighter than polychloroprene sheathed flexible cord

(design 60245 IEC57).

6. A switch with at least 3 mm contact separation in each pole shall be provided by the Air Conditioner installer.

7. Do not install a phase advancing capacitor on the motor. Doing so may damage the capacitor and result in fire.

Warning:

• Be sure to use specified wires and ensure no external force is imparted to terminal connections. Loose connections may cause overheating and fire.

• Be sure to use the appropriate type of overcurrent protection switch. Note that overcurrent may include direct current.

Caution:

• Some installation sites may require an installation of an earth leakage breaker for the inverter. If no earth leakage breaker is installed, there is a danger of electric shock.

• Only use properly rated breakers and fuses. Using a fuse or wire of the wrong capacity may cause malfunction or fire.

Note:

• This device is intended for the connection to a power supply system with a maximum permissible system impedance shown in the above table at the interface point (power service box) of the user’s supply.

• Ensure that this device is connected only to a power supply system that fulfills the requirements above.

If necessary, consult the public power supply company for the system impedance at the interface point.

• This equipment complies with IEC 61000-3-12 provided that the short-circuit power S

SC

is greater than or equal to S

SC

(*2) at the interface point between the user’s supply and the public system. It is the responsibility of the installer or user of the equipment to ensure, in consultation with the distribution network operator if necessary, that the equipment is connected only to a supply with a short-circuit power

S

SC

greater than or equal to S

SC

(*2).

S

SC

(*2)

S

SC

(MVA)

4.74

HWE14170 - 15 GB


[

II

Restrictions ]

Control cable specifications

Remote controller cable

S i z e

R e c o m m e n d e d c a b l e t y p e s

0 .

3 1 .

2 5 m m ² ( M a x .

2 0 0 m t o t a l ) *2

C V V

M-NET cable between units

S i z e

*1

R e c o m m e n d e d c a b l e t y p e s

External input wire size

External output wire size

S h i

M e i l d n .

1 .

e d

2 5 c a b m m l e C

² ( M

V V S a x .

1.25 mm²

1 2 0

, C P

Min. 0.3 mm² m t o

E V S t a l ) o r M V V S

*1 Use a CVVS or CPEVS cable (Max. total length of 200 m) if there is a source of electrical interference near by (e.g., factory) or the total length of control wiring exceeds 120 m.

*2 When the wiring length exceeds 10 m, use field-supplied wire of 1.25 mm².

2 Cable Connections

<1> Schematic Diagram of a Unit and Terminal Block Arrangement

Power supply lead-in location

See Detailed drawing

<Service side>

750

Detailed drawing

Front column

ø28 control wiring

(high voltage)

ø28 control wiring

(low voltage)

ø52 power supply wiring

Power supply terminal box

(terminal size: M8)

Ground terminal (M8)

Cable strap for the power supply wires

<Power supply box details>

Power supply box cover

30 30

(1) Remove the front column and power supply box cover.

(2) Wire the power supply and control wires. The power supply box is covered with a bush with membrane. Cut the bush with membrane before connecting wires to the terminal box.

(3) Fasten the power supply wires by the cable strap.

(4) Secure the cable conduit, and then waterproof the area around the pipe with silicon, etc.

(5) Reattach the power supply box cover and front column.

<2> Precautions when fastening screws

* Faulty contacts due to loose screws may cause overheating and fire.

* Using the circuit board while it is damaged may cause overheating and fire.

HWE14170

1 Screw fastening torque

Power supply terminal block (TB4)...M8 screw:

10 to 13.5 N·m

Use the following methods to check that the screws have been fastened.

- 16 GB


[

II

Restrictions ]

1. Check that the spring washer is in a parallel position.

* If the screw is biting into the washer, simply fastening the screw to the specified torque cannot determine whether it has been installed properly.

Loose screws

Properly installed

Spring washer is in a

parallel position

2. Check that the wiring does not move at the screw terminal.

2 Take extra care not to ruin the screw thread due to fastening the screw at an angle.

* To prevent fastening the screw at an angle, install the round terminals so they are back to back.

3 After fastening the screw, use a permanent marker to tick off the screw head, washer and terminal.

Ticked with marker

For transition wiring

Power supply wiring

Install the round terminals so they are

back to back

.

Power supply terminal block

Important:

Power supply cables larger than 25 mm

2

in diameter are not connectable to the power supply terminal block (TB4). Use a pull box to connect them.

<3> Installing the conduit tube

• Always use a conduit to run the power supply wiring.

• Select the conduit size based on the hole.

• The cable conduits must be prepared locally.

• Do not store the 24VDC or less low-voltage circuit and 100VAC or higher main circuit and control circuit cables in the same multi-core cable, or bundle them together.

• Attach cable conduits securely to the foundation, etc. to ensure that excessive loads are not applied to the power supply terminal box.

• Seal the area around the cable conduit connection to ensure that no water penetrates the cable conduit connection port.

ø28 control wiring

(low voltage)

ø28 control wiring

(high voltage)

ø52 power supply wiring

HWE14170 - 17 GB


[

II

Restrictions ]

[4] Sample Installation

The system must be configured only by personnel certified by Mitsubishi Electric.

[1] Schematic Diagrams of Individual and Multiple Module Connection Systems

(1) Individual system


SUB

PCB

MAIN

PCB


(PAR-W21MAA)

Refer to the sections "Switch Types and the Factory Settings" (page19) and

"System configuration procedures: Individual system" (page 22) for further details.

(2) Multiple module connection system (2-6 modules)

* A group of module that consists of one main module and up to 5 sub modules is operated collectively by connecting an external water temperature sensor and a dry contact switch/relay to the main module.

1 2 6

SUB

PCB

MAIN module

MAIN

PCB

SUB

PCB

SUB module

MAIN

PCB

SUB

PCB

SUB module

MAIN

PCB


(PAR-W21MAA)


M-NET line

Refer to the sections "Switch Types and the Factory Settings" (page19) and "System configuration procedures: Multiple module connection system" (page 23) for further details.

HWE14170 - 18 GB


[

II

Restrictions ]

[5] Switch Types and the Factory Settings

(1) Switch names and functions

Control box

(Sub circuit)

Control box

(Main circuit)

There are four main ways to set the settings as follows:

1 Dip switches (SW1 - SW3, SW421)

2 Dip switches used in combination with the push switches

3 Rotary switches

4 Slide switches

See below for how these switches are used to set certain items.

Different types of switches on the PCB

[ E n t i r e v i e w o f a P C B ]

Rotary switch (SWU3) (0-F)

Rotary switch (SWU2) (0-9)

Switches

Rotary switch (SWU1) (0-9)

[ E n l a r g e d v i e w o f t h e s w i t c h e s ]

LED display

Slide switch (SWS1)

(LOCAL, OFF, and REMOTE from the top)

Slide switch (SWS2)

(A and B from the top)

Push switch (SWP1) "UP"

Push switch (SWP2) "DOWN"

Push switch (SWP3) "ENTER"

Dip switch (SW421)

Initial Setting

MAIN circuit SUB circuit

" 0 " " 5 " R o t a r y s w i t c h ( S W U 1 ) S e t s t h e 1 0 ' s d i g i t o f t h e u n i t a d d r e s s ( M u l t i p l e s y s t e m ) .

R o t a r y s w i t c h ( S W U 2 )

Slide switch (SWS1)

Slide switch (SWS2)

Push switch (SWP1)

Push switch (SWP2)

S e t s t h e 1 ' s d i g i t o f t h e

Rotary switch (SWU3) Unused u n i t a d d r e s s ( M u l t i p l e s y s t e m ) .

LOCAL

OFF

REMOTE

The action that the switch takes when set to a certain position depends on the type of system configuration (e.g., individual or multiple system)

Cooling/Heating switching (Only EAHV-P900YA)

(Effective only when SWS1 is set to LOCAL.)

REMOTE

A

Switches the display between the current value for a specific item.

Increases value.

Switches the display between the current value for a specific item.

Decreases value.

" 1 "

"0"

-

-

" 1 "

"0"

OFF

(Unused)

A

(Unused)

-

-

Push switch (SWP3)

Enables the change of value.

Saves the changed value.

Dip switches (SW1-3) Setting c h a n g e o r v i e w t h e s e t t i n g s

-

-

-

-

D i p s w i t c h ( S W 4 2 1 ) A n a l o g i n p u t t y p e s e t t i n g ( R e f e r t o P a g e 7 8 ) ( U n u s e d )

Dip switch (SW1)

Dip switch (SW2)

Dip switch (SW3)

Slide the dip switches; do not push down the switches.

HWE14170 - 19 GB


[

II

Restrictions ]

[6] Configuring the Settings

The settings must be set only by a qualified personnel.

<1> Making the settings

Use the LED display and the three push switches (SWP1 (↑), SWP2 (↓), and SWP3 (Enter)) to change the current settings on the circuit board and to monitor various monitored values.

(1) Setting procedures

1

Take the following steps to set the push switches SWP1 through SWP3. These switches must be set after the dip switch SW1 has been set.

Normally a value of setting item appears on the display.

↓

Press SWP3 (Enter) to enable the configuration changes.

SWP1

SWP2 SWP3

Enter

2

The current setting value will blink.

↓

The left figure shows that the current setting value is "60.0."

To decrease this value to 58.0, for example, press SWP2 (↓).

Press SWP1 (↑) to increase the value.

SWP1

SWP2

3

SWP1

SWP2

SWP3

Enter

SWP3

Enter

When the desired value is displayed (58.0 in the example at left), press SWP3 (Enter).

↓

The displayed value will stop blinking and stay lit.

A lit LED indicates that the new setting has been saved.

* Pressing SWP1 (↑) or SWP2 (↓) will change the blinking setting value, but the change will not be saved until SWP3 (Enter) is pressed.

Press and hold SWP1 (↑) or SWP2 (↓) for one second or longer to fast forward through the numbers.

HWE14170 - 20 GB


[

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Restrictions ]

(2) Table of settings items

Set the dip switch SW1 as shown in the table below to set the value for the items in the "Setting item" column.

No.

Dip switch setting (SW1) *1

■ :ON □:OFF

3

4

1

2

7

8

5

6

9

1

10 1

11

12

13 1

2

1

1

2

2

1 2

4

4

3 4

3 4

2 3 4

4

4

4 5 6

4

5

5

5

6

6

7

7

7

7

7

7

7

7

8

8

8

8

8

8

8

8

8

9

9

9

9

9

S e t t i n g I t e m

10 Maximum peak-demand capacity

10 Peak-demand control start time

10 Peak-demand control end time

10 Setting temp 1 (Cooling mode) *2

10 Setting temp 2 (Cooling mode) *2

10 Setting temp 1 (Heating mode) *3

10 Setting temp 2 (Heating mode) *3

10 Setting water temp A at Heating ECO mode *3

10 Setting outdoor temp A at Heating ECO mode *3

10 Setting water temp B at Heating ECO mode *3

10 Setting outdoor temp B at Heating ECO mode *3

100%

13:00

13:00

7ºC

20ºC

45ºC

55ºC

55ºC

0ºC

35ºC

25ºC

10 Setting water temp C at Heating ECO mode *3 45ºC

10 Setting outdoor temp C at Heating ECO mode *3 15ºC

14

15

16 1

17 2

3

3

3

3

4

4

4

18 1 2 3 4

8

8

8

8

8

10 Enable/disable schedule setting *4

10 ON time 1 (at schedule mode without remote) *2

0

0:00

10 OFF time 1 (at schedule mode without remote) *2 0:00

10 ON time 2 (at schedule mode without remote) *3 0:00


D e f a u l t

19 1 2

20

21 1 2

22

3

4

3 4

5

5

7 8

7 8

10 ON time 3 (at schedule mode without remote) *3 0:00


9 10 Thermo differential 1 (Cooling mode) *2

9 10 Thermo differential 2 (Cooling mode) *2

2ºC

2ºC

23 1

24

25

26 1

2

3

3

3

4

4

5 6 8

7 8

27 1 2 3

28

29

2 5

7

7

8

8

2 3 4 5 6 7 8 9

30 1

31

3 4 5 6 7 8 9

3 4 5 6 7 8 9

9 10 Thermo differential 1 (Heating mode) *3

9 10 Thermo differential 2 (Heating mode) *3

10 Drain pan heater operation outdoor temp

10 Supplementary heater operation water temp *3

10 Supplementary heater operation outdoor temp *3

1

1 0

1

1

0

0

0

S e

C u r r e n t t i m e

M o n t h

Y e l e c t a h e a a r

/ D a t e s e s e t t i n g t i n g t t i c u r v e * 3 n g

2ºC

2ºC

0ºC

40ºC

-10ºC

1

-

-

-

*1: Do not apply undue force when changing the Dip switch settings as this may cause malfunctions.

*2: They are enabled during the cooling. (EAHV-P900YA, EACV-P900YA)

*3: They are enabled during the heating. (EAHV-P900YA, EAHV-P900YA-H)

*4: Disable the schedule setting when using the remote controller.

Range 60-100%

N o t e s

Range 5-25ºC

Range 5-25ºC

Range 30-55ºC

Range 30-55ºC

Range 30-55ºC

Range -30-50ºC

Range 30-55ºC

Range -30-50ºC

Range 30-55ºC

Range -30-50ºC

Set to "1" to enable scheduled operation.

Cooling mode ON

Cooling mode OFF

Heating mode ON

Heating mode OFF

Heating ECO mode ON

Heating ECO mode OFF

Range 0.2-5ºC

Range 0.2-5ºC

Range 0.2-5ºC

Range 0.2-5ºC

Range -40-20ºC

Range 0-55ºC

Range -30-50ºC

0 : 2 p o i n t s y s t e m , 1 : c u r v e

HWE14170 - 21 GB


[

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Restrictions ]

<2> System configuration

(1) System configuration procedures: Individual system

1. Set the dip switches on the MAIN circuit board.

U n i t ( S U B c i r c u i t )

Switch settings on the MAIN circuit

Set the dip switches (labeled A in the figure at right) that correspond to the items below, according to the local system.

• Water temperature control based on the external water temperature reading

• Analog signals from a remote location

Refer to "Dip switch settings table" (page 71) for further details.

10’s digit (5) 1’s digit (1) (0)

2. Switch on the power to the unit.

Check for loose or incorrect wiring, and then switch on the power to the unit.

U n i t ( S U B c i r c u i t )

U n i t ( M A I N c i r c u i t )

10’s digit (0) 1’s digit (1) (0)

B

U n i t ( M A I N c i r c u i t )

When the power is switched on, the following codes will appear on the LED:

• [EEEE] will appear on LED1 in the MAIN circuit board (labeled A in the figure at right).

• [9999] will appear on LED1 in the SUB circuit board (labeled B in the figure at right).

10’s digit (5) 1’s digit (1) (0) 10’s digit (0) 1’s digit (1) (0)

Within 50 seconds after the power is switched on, the following codes will appear on the LED:

• [****] will appear on LED1 in the MAIN circuit board (labeled A in the figure above).

• [0000]→[****] will appear on LED1 in the SUB circuit board (labeled B in the figure above).

A

****

0000

0001

0002

Model

EACV-P900YA

EAHV-P900YA

EAHV-P900YA-H

Then, the setting item "SW3-3" (page 71) will appear on the LED.

A

HWE14170 - 22 GB


[

II

Restrictions ]

(2) System configuration procedures : Multiple modules connection system

1. Set the rotary switches.

System configuration diagram

1 2 6

SUB

PCB

MAIN module

Address: 51


(PAR-W21MAA)

MAIN

PCB

SUB

PCB

SUB module

Address: 1


MAIN

PCB

SUB

PCB

SUB module

Address: 2

M-NET line

Address: 52

MAIN

PCB

Address: 6

Address: 56

Setting the switches on the main module

Make sure the address of the MAIN circuit on the main module is set to "1" (labeled A in the figure at right) and that the address of the SUB circuit on the main module is set to "51" (labeled B in the figure at right).

The address of each SUB circuit should equal the sum of the MAIN circuit address on the same module and 50.

Main module (SUB circuit)

10’s digit (5) 1’s digit (1) (0)

B

Setting the switches on all sub modules

MAIN circuit

(1) Set the MAIN circuit addresses with the rotary switches. (labeled A in the figure at right). Set the 10's digit with SWU1, and set the 1's digit with SWU2. Assign sequential addresses to the MAIN circuit on all sub modules starting with 2.

SUB circuit

(2) Set the SUB circuit addresses with the rotary switches (labeled B in the figure at right). Set the 10's digit with SWU1, and set the 1's digit with SWU2. Assign sequential addresses to the SUB circuit on all sub modules starting with 52.

Sub module (SUB circuit)

10’s digit (5) 1’s digit (1) (0)

B

Main module (MAIN circuit)

10’s digit (0) 1’s digit (1) (0)

A

Sub module (MAIN circuit)

10’s digit (0) 1’s digit (1) (0)

A

HWE14170 - 23 GB


[

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Restrictions ]

2. Switch on the power to the unit.

Check for loose or incorrect wiring, and then switch on the power to all modules.

When the power is switched on, the following codes will appear on the LED:

• [EEEE] will appear on LED1 in the MAIN circuit board.

• [9999] will appear on LED1 in the SUB circuit board.

Main module (SUB circuit)

Sub module (SUB circuits)

10’s digit (5) 1’s digit (1) (0)

Within 50 seconds after the power is switched on, the following codes will appear on the LED:

• [****] will appear on LED1 in the MAIN circuit board.

• [0000]→[****] will appear on LED1 in the SUB circuit board.

[9999]

****

0000

0001

0002

Model

EACV-P900YA

EAHV-P900YA

EAHV-P900YA-H

Then, the setting item "SW3-3" (page 71) will appear on the LED.

Main module (MAIN circuit)

Sub module (MAIN circuits)

10’s digit (0) 1’s digit (1) (0)

[EEEE]

3. Perform an initial setup on the main and sub modules

Perform the initial setup of all modules in accordance with the table below.

No.

1

2

3

1

2

Dip switch setting (SW1)

■ :ON □:OFF

8

8

8

1

1

0

0

S e t t i n g t h e

S e t t i n g m u l t i p l

Setting Item e m o d t h e m a i n m o d u l e u l e s

10 Setting the total number of modules

Main module

1

1

2-6

Sub module

1

0

-

4 3 8 1 0 S e t t i n g t h e p u m p s y s t e m * 0 o r 1 0 o r 1

*Change the setting to "0" in the multiple modules of the Standard piping type in one pump system and the Inside header piping type.

Default

0

0

1

1

HWE14170 - 24 GB


[

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Restrictions ]

[7] Water Pipe Installation

1. Schematic Piping Diagram and Piping System Components

Please build the water circuit so that it is a closed system.

Do not use water directly for showers or other applications.

Do not allow other heat source water to mix with the water circuit.

Build a water circuit as inlet water temperature fluctuation is within 5ºC/10 minutes.

Indicates the direction of the flow.

Water supply

Overflowed water

To drain outlet

Unit

Minimum upward gradient of 1/200

Air conditioning floor heating etc c

Water side heat exchanger

1 Union joints/flange joints

2 Thermometer

3 Water pressure gauge

4 V a l v e

5 Flexible joint

6 Pump

7 Air vent valve

8 Expansion tank

9 W a t e r p i p e

0 D r a i n v a l v e a Strainer b Flow switch c Drain pipe

Required to allow for a replacement of equipment.

Required to check the performance and monitor the operation of the units.

Recommended for checking the operation status.

R e q u i r e d t o a ll o w f o r a r e p l a c e m e n t o r c l e a n i n g o f t h e f l o w a d j u s t e r .

Recommended to prevent the noise and vibration from the pump from being transmitted.

Use a pump that is large enough to compensate for the total water pressure loss and supply sufficient water to the unit.

Install air venting valves to the places where air can accumulate.

Automatic air vent valves (such as 7 ') are effective.

Install an expansion tank to accommodate expanded water and to supply water.

U s e p i p e s t h a t a ll o w f o r e a s y a i r p u r g i n g , a n d p r o v i d e a d e q u a t e i n s u l a t i o n .

I n s t a ll d r a i n v a l v e s s o t h a t w a t e r c a n b e d r a i n e d f o r s e r v i c i n g .

Install a strainer near the unit to keep foreign materials from entering the water-side head exchanger.

Required to protect the unit.

Install the drain pipe with a downward inclination of between 1/100 and 1/200. To prevent drain water from freezing in winter, install the drain pipe as steep an angle as practically possible and minimize the straight line.

For cold climate installation, take an appropriate measure (e.g., drain heater) to prevent the drain water from freezing.

HWE14170 - 25 GB


[

II

Restrictions ]

2. Water piping attachment method

Standard piping type

Water outlet

Water inlet

50A housing type joint

(field-supplied Victaulic joint)*

* Victaulic standard groove specifications

Machine grooves to secure housing joints to field-supplied pipes based on the following dimensions.

L W

D G

D

G

L

W

Pipe size

50A

ø60.3 ± 0.61

ø57.15

0

-0.38

15.88 ± 0.76

7.95 ± 0.76

Inside header piping type

It requires optional Inside heder piping kit.

Option Parts: EA-01HK

A

Water outlet

Water inlet


(field-supplied Victaulic joint)*

A

* Victaulic standard groove specifications

Machine grooves to secure housing joints to field-supplied pipes based on the following dimensions.

L W

D G D

G

L

W

Pipe size

100A

ø114.3

+1.14

-0.79

ø110.08

0

-0.51

15.88 ± 0.76

9.53 ± 0.76

HWE14170 - 26 GB


[

II

Restrictions ]

On-site module connection and terminal work

The module connection requires the option of both Inside header piping kit (EA-01HK) and Inside header connecting kit (EA-02HK). Inside header connecting kit requires the same number as the number of connections.

Option Parts: EA-01HK

EA-02HK

* Refer to the installation instructions for the details of installation of the optional parts.

Pipe end attachment

(performed at customer's site)

Water outlet

Water inlet

Field-supplied

Victaulic joints are used to connect pipes at the customer's site.

*Straub joint, and short pipe are provided.

Inside header

Inside header

Pipe end attachment

Victaulic joint Pipe cap

HWE14170

Pipe end attachment (performed at customer's site)

Attachment has been made easy with the adoption of a

Straub joint to connect pipes to the relevant connection points.

Field-supplied

Victaulic joint

Joint pipe

Straub joint

Straub joint

The seal rubber has a lip construction to improve water stopping performance.

Adjust the Straub position to that the marking on both sides is visible.

Marking

Victaulic joint

Straub joint

W

The bolts need only be tightened until the casing is sealed (metal touches).

Consequently, the procedure can be carried out accurately by anyone to the same level, regardless of worker proficiency or the type of pipe.

θθ

θ

● Allowable tolerance for gaps and tilting

Pipe gap tolerance [W]: 0 to 25 mm

Allowable pipe tilt angle [ θ]: ±2°

The Victaulic joints and Straub joints used in the explanation are actual product names.

- 27 GB


[

II

Restrictions ]

3. Notes on pipe corrosion

Water treatment and water quality control

Poor-quality circulating water can cause the water-side heat exchanger to scale up or corrode, reducing heatexchange performance. Properly control the quality of the circulating water.

• Removing foreign objects and impurities in the pipes

During installation, keep foreign objects, such as welding and sealant fragments and rust, out of the pipes.

• Water Quality Control

(1)

Poor-quality water can corrode or scale up the heat exchanger. Regular water treatment is recommended.

Water circulation systems using open heat storage tanks are particularly prone to corrosion.

When using an open heat storage tank, install a water-to-water heat exchanger, and use a closed-loop circuit.

If a water supply tank is installed, keep contact with air to a minimum, and keep the level of dissolved oxygen in the water no higher than 1 mg/ℓ.

(2) Water quality standard

Items

Lower mid-range temperature water system Higher mid-range temperature water system

Water Temp. ≤ 60ºC Water Temp. > 60ºC

Recirculating water Make-up water Recirculating water Make-up water

Tendency

Corrosive

Scaleforming

Standard items pH (25°C)

Electric conductivity (mS/m) (25°C)

(μs/cm) (25°C)

Chloride ion

Sulfate ion

(mg Cl

-

/ℓ)

(mg SO4

2-

/ℓ)

Acid consumption

Total hardness

(pH4.8) (mg CaCO

3

/ℓ)

(mg CaCO

3

/ℓ)

Calcium hardness

Ionic silica

I r o n

(mg CaCO

3

/ℓ)

(mg SiO

2

/ℓ)

( m g F e / ℓ)

30 or less

[300 or less]

50 or less

50 or less

50 or less

70 or less

50 or less

30 or less

1.0 or less

30 or less

[300 or less]

50 or less

50 or less

50 or less

70 or less

50 or less

30 or less

0.3 or less

30 or less

[300 or less]

30 or less

30 or less

50 or less

70 or less

50 or less

30 or less

1.0 or less

30 or less

[300 or less]

30 or less

30 or less

50 or less

70 or less

50 or less

30 or less

0.3 or less

Reference items

Copper

Sulfide ion

Ammonium ion

Residual chlorine

Free carbon dioxide

(mg Cu/ℓ) 1.0 or less 1.0 or less 1.0 or less 1.0 or less

(mg S

2-

/ℓ) Not to be detected Not to be detected Not to be detected Not to be detected

(mg NH

4

+

/ℓ) 0.3 or less 0.1 or less 0.1 or less 0.1 or less

0.25 or less 0.3 or less 0.1 or less 0.3 or less (mg Cl/ ℓ)

(mg CO

2

/ℓ)

0.4 or less 4.0 or less 0.4 or less 4.0 or less

R y z n e r s t a b i il t y i n d e x — — —

Reference: Guideline of Water Quality for Refrigeration and Air Conditioning Equipment. (JRA GL02E-1994)

—

(3)

Please consult with a water quality control specialist about water quality control methods and water quality calculations before using anti-corrosive solutions for water quality management.

(4)

When replacing an air conditioner (including when only the heat exchanger is replaced), first analyze the water quality and check for possible corrosion.

Corrosion can occur in water systems in which there has been no signs of corrosion. If the water quality level has dropped, adjust the water quality before replacing the unit.

HWE14170 - 28 GB


[

II

Restrictions ]

(5) Suspended solids in the water

Sand, pebbles, suspended solids, and corrosion products in water can damage the heating surface of the heat exchanger and cause corrosion. Install a good quality strainer (20 mesh or better) at the inlet of the unit to filter out suspended solids.

Removing foreign substances from the water system

Consider installing a settlement tank or a bypass strainer to remove foreign substances from the water system.

Select a strainer capable of handling two to three percent of the circulating water. The figure below shows a sample system with a bypass strainer.

Load system unit

Heat pump unit

Pump

Tank

Strainer (20 mesh or its equivalent)

Bypass strainer (100 mesh or its equivalent)

(6) Connecting pipes made from different materials

If different types of metals are placed in direct contact with each other, the contact surface will corrode.

Install an insulating material between pipes that are made of different materials to keep them out of direct contact with each other.

(7) Piping material

Use hot water output piping material that can withstand heat of 60°C or more. Use hot water input piping material that can withstand the maximum input water temperature. All piping must be ma de of SUS or similar material to withstand corrosion.

HWE14170 - 29 GB


[

II

Restrictions ]

(1) Installing the strainer

Install a strainer on the inlet pipe near the unit to filter out suspended solids and prevent clogging or corrosion of the heat exchanger.

Install a strainer in a way that allows for easy access for cleaning, and instruct the user to clean it regularly.

Operating the units with a clogged strainer may cause the units to make an abnormal stop.

Select a location to install a strainer, taking into consideration the installation angle, insulation thickness, and maintenance space.

* The dimensions given below indicate the amount of space necessary when screwing in a Y-shaped strainer.

<Unit: mm>

Rc2

195

Y-shaped strainer

Pipe

(field-supplied)

Recommended torque :

200±20 (N·m)

Unit

Inlet

143

Option Parts : YS-50A*

* YS-50A is for standard piping type.

Inside header type will need to supply a strainer (20 mesh or its equivalent) for

100A piping to the site.

(2) Installing a flow switch

Min. 150

Sample installation

Install a flow switch that meets the following specifications on the water pipe.

Connect the flow switch to the flow switch contact on the unit.

Minimum flow rate= 7.7 m³/h (128 L/min)

Unit usage range (water flow rate): 7.7 - 128 m³/h

HWE14170 - 30 GB


[

II

Restrictions ]

5. Minimum and maximum water flow rates

A low flow rate will not only compromise the performance of the unit but also increase the water temperature difference between the periods when the unit is in operation and when the unit is stopped. A high flow rate will cause the pipes to corrode.

Adjust the circulating flow rate so that the difference between the inlet and outlet temperatures will be between 3 ºC and 10

ºC. Refer to the table below for the standard, minimum, and maximum flow rates.

Standard, Minimum, and Maximum flow rates

Standard flow rate Minimum allowable flow rate

Unit: m

3

/h

Maximum allowable flow rate

15.5

7.7

25.8

The hot water flow rate will be considered appropriate if the difference between the inlet and outlet water temperatures is between 3 ºC and 10 ºC.



If the temperature difference is less than 3 ºC

Decrease the flow rate.



If the temperature difference is more than 10 ºC

Increase the flow rate. Check the pipes for air pockets, and make sure that the pump has enough capacity to sustain appropriate water pressure in a given water circuit.

6. Maintaining the appropriate amount of water in the water circuit.

(1) Amount of water in the water circuit

Shortage of water in the circulating water circuit may shorten the operation time of the unit or cause large fluctuations of water temperature. The table below shows the minimum allowable amount of water in the water circuit. If the piping length is too short to secure this amount, install a cushion tank to ensure that the circuit has enough water in it.

Model

EAHV-P900YA(-H)

EACV-P900YA

Minimum allowable amount of water ( ℓ

)

780

420

(2) Calculating the amount of water in the circuit

The amount of water in the circuit can be obtained using the following formula.

Amount of water in the water circuit = Amount of water in the water piping + Amount of water in the unit + and Amount of water in the load-side or heat source unit

The table below shows the amount of water in the water piping per 1 m

Amount of water in the piping

Internal volume per meter ( ℓ

/m)

Pipe size

1 1/2B A(40A) 2B (50A) 2 1/2B (65A) 3B (80A)

1.36

2.20

3.62

5.12

The table below shows the amount of water in the unit.

Amount of water in the unit

EAHV-P900YA(-H), EACV-P900YA

20

EAHV-P900YA(-H)-N, EACV-P900YA-N

55

4B (100A)

8.71

5B (125A)

13.44

7. Sizes and the material types of the pipes on the unit

The table below shows the sizes of the pipes.

Pipe sizes

Model

EAHV-P900YA(-H)

EACV-P900YA

EAHV-P900YA(-H)-N

EACV-P900YA-N

Inlet pipe connection


(Field-supplied Victaulic joint)

<SUS304 50A pipe>



<SUS304 100A pipe>

Outlet pipe connection



<SUS304 50A pipe>



<SUS304 100A pipe>

HWE14170 - 31 GB


[

II

Restrictions ]

8. Water Piping Size and Location

<1> Standard piping type

Water inlet


Water outlet


Drain

R1

375

983

750

250

750

1017

375

Drain

R1

Drain

R1

<2> Inside header piping type

Water outlet


(Case of right side piping)

Water outlet


(Case of left side piping)

125

Drain

R1

375 750

Water inlet


(Case of right side piping)

750 375

Drain

R1

Drain

R1

Water inlet


(Case of left side piping)

125

HWE14170 - 32 GB


III

Unit Components

[1] Unit Components and Refrigerant Circuit ........................................................................ 35

[2] Control Box of the Unit..................................................................................................... 39

[3] Unit Circuit Board............................................................................................................. 41

HWE14170 - 33 GB


HWE14170 - 34 GB


[

III

Unit Components ]

[1] Unit Components and Refrigerant Circuit

Pillar M Panel assy T

Air guide

Decorative panel SL

Panel SL

Panel M

Panel S

Decorative panel SR

Panel S1

Panel F

Panel SR

Wiring window cover

Pillar assy R

Rear panel

Pillar R

Rear panel

Pillar MR

Pillar cover SL

Pillar R

Panel S

<Standard piping type>

Rear panel

<Inside header piping type>

Panel S1

HWE14170 - 35 GB


[

III

Unit Components ]

Fan motor

Fan

HWE14170

SUB CONTROL BOX TERMINAL BOX

FAN CONTROL BOX MAIN CONTROL BOX

- 36 GB


[

III

Unit Components ]

Scroll compressor (SUB)

Thermistor (TH21)

Linear expansion valve

Water-side heat exchanger assy

Check joint


Check joint


Thermistor (TH11)

Scroll compressor

(MAIN)

Pressure sensor LP

Pressure sensor HP

High pressure switch

Pressure sensor LP

Pressure sensor HP


Thermistor

(TH26)

Strainer Belt heater

Rubber mount

Four way valve

<EAHV only>

Oil separator Thermistor

(TH27)

Strainer

Thermistor

(TH7)

(TH2)

Thermistor

Strainer


Thermistor

Thermistor

(TH6)

(TH1)

Four way valve

Oil separator

<EAHV only>

Rubber mount

Heat exchanger

Tank assy

<EAHV only>

Check valve

Thermistor

(TH10)

Accumulator

Air purge valve

Thermistor

(TH3)

HWE14170

Thermistor (TH5) Housing joint (40A)


Thermistor (TH25)

- 37 GB


[

III

Unit Components ]

Air purge valve

Housing joint (50A)

Thermistor

(TH3)

Housing joint (100A)

Ball valve

Air purge valve



HWE14170 - 38 GB


[

III

Unit Components ]

[2] Control Box of the Unit

(1) Main circuit control box

DC reactor

(DCL)

Rush current protection resister

Capacitor

INV board

Control board

Electromagnetic relay

(52C)

Noise filter

(Compressor)

Terminal block

(TB1)

(2) Sub circuit control box

DC reactor

(DCL)

Rush current protection resister

Capacitor INV board


(52C)

Noise filter

(Compressor)

Terminal block

(TB2)

M-NET board

Control board

HWE14170 - 39 GB


[

III

Unit Components ]

(3) Fan control box

Capacitor Diode bridge Capacitor Diode bridge

Noise filter

(Fan)

Noise filter

(Fan)

Fan control board

Fan control board

1) Exercise caution not to damage the bottom and the front panel of the control box. Damage to these parts affect the waterproof and dust proof properties of the control box and may result in damage to its internal components.

2) Faston terminals have a locking function. Make sure the cable heads are securely locked in place. Press the tab on the terminals to remove them.

(4) Terminal box

Terminal block

(TB5)

Terminal block

(TB6)

Terminal block

(TB4)

HWE14170 - 40 GB


[

III

Unit Components ]

[3] Unit Circuit Board

1. Control board (MAIN board)

CN 2

Serial communication signal input

GND

Output 17VDC

CN801

Pressure switch connection

CNDC

Bus voltage input

P

N

Voltage output at the dry contact

Rotary switch

SWU1-3

Slide switch

SWS1-2

Actuator driving output

IT terminal

CNAC

200 VAC input

R

S

CN 4

GND

Serial communication signal output

LED4

Energization status

(CPU)

LEV driving output

CN3A

Remote controller

LED1

Digital display

LED3

Energization status

(Remote controller)

Dip switch

SW1-3

Push switch

SWP1-3

Sensor input

Dip switch

SW421

F06

Fuse

250V/3.15A

External signal input

(contact input)

CN62

Transmission line input/output for centralized control system

LED2

Lit during normal

CPU operation

Internal transmission line input/output (30VDC)

CNIT

Output 12VDC

GND

Output 5VDC

RX (Power supply detection input)

TX (Power supply ON/OFF signal output)

HWE14170 - 41 GB


[

III

Unit Components ]

CN04

Bus voltage input

P

N

CNS2

Transmission line input/output for

CN102 centralized control system

Power supply output for centralized control system

Indoor/outdoor transmission line input/output

Grounding

CNIT

12VDC input

GND

5VDC input

Power supply detection output

Power supply ON/OFF

signal input

LED1

Power supply for indoor transmission line

Grounding

Grounding

Ground terminal for

TB3 outdoor transmission transmission line block

TB7

Terminal block for transmission line for centralized control

TP1,2

Check pins for outdoor transmission line

HWE14170 - 42 GB


[

III

Unit Components ]

SC-P2

SC-P1

Rectifier diode output (P)

Bus voltage Input(P)

CN6

Open: No-load operation setting

LED1

Short-circuited: Normal setting

Lit: Inverter in normal operation

Blink: Inverter error

CN5V

GND

5VDC output

RSH1

Overcurrent detection resistor

CN43

GND(Control Board)


Bus voltage check terminal (P)

Note

IGBT

(Rear)

CN1

Bus voltage output

N

P

Bus voltage check terminal (N)

Note 1

SC-L1

Input(L1)

SC-L2

Input(L2)

SC-L3

Input(L3)

CN2

Serial communication

signal output

GND

17VDC input

CNTYP Inverter board type

SC-V

Inverter output(V)

SC-W

Inverter output(W)

SC-U

Inverter output(U)

CT12

Current sensor(U)

CT22

Current sensor(W)

C30 C37

Smoothing capacitor

CT3

Current sensor(L3)

1) Before inspecting the inside of the control box, turn off the power, keep the unit off for at least 10 minutes, and confirm that the voltage between FT-P and FT-N on INV

Board has dropped to DC20V or less.

It takes about 10 minutes to discharge electricity after the power supply is turned off.

HWE14170 GB


[

III

Unit Components ]

4. Noise Filter (Compressor)

CN4

Output

(Rectified L2-N current)

P

N

CN2

Surge absorber circuit

Surge absorber circuit

Short circuit

Short circuit

F1,F2,F3,F4

Fuse

250VAC 6.3A

Grounding

CN5

Output

(Rectified L2-N current)

P

N

Grounding

CN3

Output

L1

N

CN1A

Input

N

L1

CN1B

Input

L3

L2

TB21

Input/output(L1)

TB22

Input/output(L2)

TB23

Input/output(L3)

TB24

Input(N)

HWE14170 - 44 GB


[

III

Unit Components ]

5. Fan control board

CNDC

Bus voltage input

N

P

CN4B


GND

CN2B

GND

5VDC input


GND

17VDC input

17VDC input

CNF1

Vm

GND

Vcc

Vsp

FG

CNF2

Vm

GND

Vcc

Vsp

FG

CNF3

Vm

GND

Vcc

Vsp

FG

CN2A

18VDC input

GND


GND

17VDC input

17VDC input

CN4A


GND

HWE14170 GB


[

III

Unit Components ]

6. Noise Filter (Fan)

CNACL

Open:No-load operation setting

Short-circuited: normal setting

CNR1

To R13 or R23

CNDB

AC output

L

N

Bus voltage input

P

N

HWE14170

CNDP

L2 or L3

N

FG

- 46 -

CNFAN

Bus voltage output

P

N

CNXB1

X010 ON

12VDC input

GB


IV

Remote Controller

[1] Using the Remote Controller............................................................................................ 49

[2] Function Settings ............................................................................................................. 54

HWE14170 - 47 GB


HWE14170 - 48 GB


[

IV

Remote Controller ]

IV

Remote Controller

[1] Using the Remote Controller

<1> Starting and Stopping Operation and

Changing the Operation Mode

2

Set Temperature buttons

3

3

Mode (BACK) 2 button

˚C

˚C

TEMP.

ON/OFF

BACK

PAR-W21MAA

MENU

MONITOR/SET DAY

CLOCK

ON/OFF INITIAL SETTING

TEST CHECK

CLEAR

CIR.WATER

4

1 Power

Indicator

1 ON/OFF

(BACK) button

To Start Operation

1. Press the ON/OFF (BACK) button

1

.

The power indicator

1

and the display will light up.

To Stop Operation

1. Press the ON/OFF (BACK) button

1

while the unit is in operation.

The power indicator 1 and the display will light off.

The remote controller will remember the last mode and temperature settings when turned off.

To select the Mode

1. With the power turned on, press the Mode (BACK) button

2

until the desired mode appears.

• Each press changes the operation mode in the following sequence

(see notes *1 and *2 below):

Heating→Heating ECO→Anti-freeze→Cooling→Back to Heating.

The currently selected mode will appear in the area labeled 2 .

*1 If K07-K08 or K13-K15 is ON (CLOSE), the operation mode except Cooling mode cannot be changed from the remote controller.

*2 The available modes vary depending on the model.

*3 Refer to section [2] "Function Settings" [2]-2. (2) for how to change the settings for a specific function.

HWE14170 - 49 GB


[

IV

Remote Controller ]

<2> Setting the Water Temperature

The current water temperature will appear in the area

How to Set the Day of the Week and Time

3

Day of the Week Setting

2

TIME SUN

4

Time Setting

How to Change the Temperature Setting

1. To lower the water temperature setting

Press the Set Temperature button

3

.

2. To raise the water temperature setting

Press the Set Temperature button

3

.

• Each press increases or decreases the temperature by 1 °C (1 °F).

The current setting will appear in the area labeled

3

in the figure on the previous page.

• The settable ranges for the “Hot Water” and “Heating” modes are as follows. *1, *2

Heating Cooling

30 °C - 55 °C

86 °F - 131 °F *3

5 °C - 25 °C

41 °F - 77 °F *3

Note:

*1 Available ranges vary depending on the type of unit connected.

*2 If the temperature ranges are restricted from the remote controller, the settable ranges may be narrower than shown above. If an attempt is made to set a value outside of the restricted range, the display will show a message indicating that the range is currently restricted.

For information about how to set and clear the restrictions, refer to section

[2], item [2]–2. (3).

*3 Temperatures can be displayed in Celsius or Fahrenheit (factory setting:

Fahrenheit). For information about how to select °C or °F , refer to section

[2], item [2]–4. (1).

• Water temperature can be controlled based on the outlet temperature.

* The water temperature range that can be displayed is between 0 °C to

100 °C. Outside this range, the display flashes either 0 °C or 100 °C.

<3> Setting the Day of the Week and Time

Use this screen to set and change the current day of the week and time settings.

Note:

The day and time will not appear if the clock display is disabled from the remote controller on the Function Selection menu.

1 Day of the Week &

Time display

2

11

˚C

TEMP.

ON/OFF

BACK

PAR-W21MAA

MENU

MONITOR/SET

CLOCK

ON/OFF

DAY

INITIAL SETTING

TEST CHECK

CLEAR

CIR.WATER

9

4

1. Press the area labeled

2

.

or Set Time button 11 to bring up in the

2. Press the TIMER ON/OFF (SET DAY) button 1 to set the day (labeled 3 in the figure).

* Each press advances the day.

3. Press the Set Time button

11

as necessary to set the time.

* When the button is held down, the time (at 4 ) will increment first in one-minute intervals, then in ten-minute intervals, and then in one-hour intervals.

4. After making the appropriate settings in Steps 2 and 3, press the

CIR.WATER button 4 to save the values.

Note:

The changes will be lost unless the Mode (BACK) button

2

is pressed before the CIR.WATER button 4 is pressed.

5. Press the Mode (BACK) button 2 to complete the setting procedure and return the display to the normal operation screen. The new day and time will appear in the area labeled 3 .

<4> Using the Timer

Three types of timers are available as follows:

1

Weekly timer,

2

Simple timer, or 3 Auto-Off timer. The timer type can be selected from the remote controller on the Function Selection menu.

For information about how to use the Function Selection menu on the remote controller, refer to [2]–3. (3) (page 55).

Using the Weekly Timer

1. The weekly timer can be used to schedule up to six events for each day of the week.

• Each operation event can consist of any of the following: ON/OFF time together with a temperature setting, ON/OFF time only, or temperature setting only.

• When the timer reaches the preset time, the schedule event will take place.

2. The time can be set to the nearest minute.

Note:

*1 The Weekly, Simple, and Auto-Off timers cannot be used concurrently.

*2 The weekly timer will not operate when any of the following conditions is met.

The timer is off; the system is in error; a test run is in progress; the remote controller is performing self-check or remote controller check; the timer, function, day, or time is being set. If the ON/OFF status and/or the temperature setting is centrally controlled, their settings cannot be changed according to a schedule that was set from the remote controller.

Operation No.

4 2

3

12

SUN

ON

˚C

WEEKLY

ON/OFF TEMP.

BACK

PAR-W21MAA

MENU

MONITOR/SET

CLOCK

ON/OFF

DAY

INITIAL SETTING

TEST CHECK

CLEAR

CIR.WATER

1

3

1

7 8

4

2 11 9

10

HWE14170 - 50 GB


[

IV

Remote Controller ]

How to Set the Weekly Timer

1. On the Normal Operation screen, make sure that the weekly timer icon

1 is displayed.

2. Press the TIMER MENU button

12

, so that the “Set Up” appears on the screen ( 2 ). (Each press toggles between “Set Up” and “Monitor”.)

3. Press the TIMER ON/OFF (SET DAY) button 9 to set the day. Each press advances the day, which appears in the area labeled 3 .

4. Press the or INITIAL SETTING button (

7

or

8

) to select a desired operation pattern number (1 through 6) 4 .

* (The remote-controller display on the previous page shows how the display would appear if operation #1 for Sunday were set to the values shown below.)

Setup Matrix

Op No.

No. 1

Sunday

• 8:30

• ON

• 23 °C (73 °F)

No. 2

• 10:00

• OFF

Monday

• 10:00

• OFF

…

No. 6

…

• 10:00

• OFF

Saturday

• 10:00

• OFF

<Operation 1 settings for

Sunday>

Start the unit at

8:30, with the temperature set to

23 °C (73 °F).

<Operation 2 settings for every day>

Turn off the unit at

10:00.

Note:

By selecting the day to “Sun Mon Tues Wed Thurs Fri Sat”, the same action can be carried out at the same time every day.

(Example: In Operation #2 above, the unit is scheduled to be turned off at

10:00 every day.)

Time setting

5 6

Selection operation (ON or OFF)

* Does not appear if actions are scheduled.

SUN

ON

˚C

WEEKLY

7

Temperature setting

* Does not appear if no temperature changes are scheduled.

5. Press the Set Time button

11

to set the time ( 5 ).

* Time will first increment in one-minute intervals, then in ten-minute intervals, and then in one-hour intervals.

6. Press the ON/OFF button 1 to select the desired operation (ON or OFF),

* Each press toggles through the following options:

No display (no setting) → “ON” → “OFF”

7. Press the Set Temperature button

3

to set the temperature ( 7 ).

* Each press:

No display (no setting) ↔ 5 (41) ↔ 6 (43) ↔ ... ↔ 89 (192) ↔ 90 (194)

↔ No display. (Available temperature range: The temperature display range is between 5 °C (41 °F) and 90 °C (194 °F). The actual range which the temperature can be controlled will vary according to the type of the connected unit.)

8. To clear the current values for the selected operation, press and quickly release the CHECK (CLEAR) button 10 once.

* The displayed time setting will change to “―:―”, and the ON/OFF and temperature settings will disappear.

(To clear all weekly timer settings at once, hold down the CHECK

(CLEAR) button

10

for two seconds or more. The display will begin flashing, indicating that all settings have been cleared.)

9. After making the appropriate settings in Steps 5, 6. and 7, press the

CIR.WATER button 4 to save the values.

Note:

The changes will not be saved unless the Mode (BACK) button

2

is pressed before the CIR.WATER button

4

is pressed.

If two or more different operation patterns have been scheduled for exactly the same time, only the operation with the highest Operation No. will be carried out.

10. Repeat Steps 3 through 9 as necessary to add more settings.

11. Press the Mode (BACK) button 2 to return to complete the setting procedure and return to the Normal Operation screen.

12. To activate the timer, press the TIMER ON/OFF button

9

, so that the

“Timer Off” icon ( 10 ) disappears.

* If no timer settings have been made, the “Timer Off” icon will flash on the screen.

How to View the Weekly Timer Settings

8 9

Time Settings

TIMER

SUN

ON

OFF

˚C

WEEKLY

1

1. Make sure that “WEEKLY” is displayed ( 1 ).


12

so that “Monitor” appears on the screen

( 8 ).

3. Press the TIMER ON/OFF (SET DAY) button 9 to select the desired day.

4. Press the or INITIAL SETTING ( 7 or 8 ) to toggle through the settings ( 9 ).

* Each press will advance the display to the next timer operation in order of time.

5. To close the monitor display and return to the Normal Operation screen, press the Mode (BACK) button 2 .

To Turn Off the Weekly Timer

Press the TIMER ON/OFF button

9

so that “Timer Off” appears at 10 .

TIME SUN

˚C

˚C

WEEKLY

10

To Turn On the Weekly Timer


9

so that the “Timer Off” icon ( 10 ) disappears.

TIME SUN

˚C

˚C

WEEKLY

10

Using the Simple Timer

1. The simple timer can be set in any of the following three ways.

• Start time only The unit starts when the set time has elapsed.

• Stop time only

• Start & stop times

The unit stops when the set time has elapsed.

The unit starts and stops at the respective elapsed times.

2. The simple timer can be set to start and stop the unit only once each within a 72-hour period.

The time setting can be made in one-hour increments.

Note:

*1 Weekly, Simple, and AUTO-off timers cannot be used concurrently.

*2 The simple timer will not operate when any of the following conditions is met. The timer is disabled; the system is in error; a test run is in progress; the remote controller is performing self-check or remote controller check; or a function or the timer is being set. If the ON/OFF status and/or the temperature setting is centrally controlled, their settings cannot be changed according to the schedule that was set from the remote controller.

12

Hr

AFTER

ON

TEMP.

SIMPLE

ON/OFF

BACK

PAR-W21MAA

MENU

MONITOR/SET

ON/OFF

DAY

CLOCK

INITIAL SETTING

CIR.WATER

TEST CHECK

CLEAR

1

4

2

11 9 10

HWE14170 - 51 GB


[

IV

Remote Controller ]

How to Set the Simple Timer

2 4

Time Setting

Hr

AFTER

ON

SIMPLE

3

1

Action (On or Off)

*

“– –” will appear if no temperature settings have been made.

1. On the normal operation screen, make sure that the simple timer icon is displayed (

1

). If anything other than “SIMPLE” is displayed, select the simple timer by referring to [2]-3(3) (page 55).


12

, so that “Set Up” appears (

2

). (Each press toggles between “Set Up” and “Monitor”.)

3. Press the ON/OFF button

1

to display the current ON or OFF setting.

Each press toggles between the time remaining until the unit turns on or off. (“ON” or “OFF” will appear in the area labeled

3

.)

• ON timer

• OFF timer

The unit will start operation when the specified hours have elapsed.

The unit will stop operation when the specified hours have elapsed.

4. With “ON” or “OFF” displayed on the screen (

3

), press the Set Time button

11

to set the hours until the unit turns on or off (

4

).

• Available Range: 1 to 72 hours

5. To set both the ON and OFF times, repeat Steps 3 and 4.

* Note that ON and OFF times cannot be set to the same value.

6. To clear the current ON or OFF setting: Display the ON or OFF setting (see step 3) and then press the CHECK (CLEAR) button 10 so that “-” appears where the remaining time was. To use only the ON-timer or the OFF-timer, make sure that the time setting for the timer that will not be used is set to

“-”.

7. After completing steps 3 through 6 above, press the CIR.WATER button

4 to save the value.

Note:

The changes will not be saved unless the Mode (BACK) button

2

is pressed before the CIR.WATER button 4 is pressed.

8. Press the Mode (BACK) button

2

to return to the Normal Operation screen.

9. Press the TIMER ON/OFF button 9 to start the timer countdown. When the timer is running, the remaining time should appear on the screen.

Make sure that the remaining time is displayed on the screen and that it is correct.

Viewing the Current Simple Timer Settings

5 6

Timer Setting

T I M E R Hr

AFTER

O N

OFF

SIMPLE

1

1. Make sure that “SIMPLE” is displayed ( 1 ).

2. Press the TIMER MENU button 12 , so that “Monitor” appears on the screen ( 5 ).

• If the ON or OFF simple timer is running, the current timer value will appear in the area labeled 6 .

• If ON and OFF values have both been set, the two values will appear alternately.

3. Press the Mode (BACK) button 2 to close the monitor display and return to the Normal Operation screen.

To Turn Off the Simple Timer


9

so that the timer setting no longer appears on the screen (at 7 ).

7

˚C

˚C

SIMPLE

To Turn On the Simple Timer


9

so that the timer setting appears in the area labeled

7

.

7

˚C

Hr

AFTER

ON

˚C

SIMPLE

Examples

The two examples below show how the screen will appear when both the ON- and Off- timers have been set.

Example 1:

The ON-timer is set to 3 hours, and the OFF-timer is set to 7 hours.

Hr

AFTER

ON

˚C

˚C

Hr

AFTER OFF

SIMPLE

SIMPLE

When the timer starts

2 hours after the timer started

The display will show the remaining hours until the unit will turn off.

The display will show the remaining hours until the unit will turn on.

OFF setting (7 hours)

- ON setting (3 hours)

= 4 hours.

SIMPLE


The unit will turn off and stay off until restarted.

Example 2:

The ON-timer is set to 5 hours, and the OFF-timer is set to 2 hours.

˚C

Hr

AFTER OFF

˚C

Hr

AFTER

ON

SIMPLE

SIMPLE

When timer starts


The display will show the ramaining hours until the unit will turn off.

The display will show the remaining hours until the unit will turn on.

ON-setting (5 hours) -

OFF-setting (2 hours)

= 3 hours.

˚C

˚C

SIMPLE


The unit will turn on and stay on until turned off.

HWE14170 - 52 GB


[

IV

Remote Controller ]

Using the Auto-Off Timer

1. This timer begins countdown when the unit starts, and shuts the unit off when the set time has elapsed.

2. Available settings range from 30 minutes to 4 hours in 30-minute intervals.

Note:

*1 Weekly Timer/Simple Timer/Auto Off Timer cannot be used at the same time.

*2 The Auto Off timer will not operate when any of the following conditions is in effect.

The timer is off; the system is in error; a test run is in progress; the remote controller is performing self-check or remote controller check; or a function or the timer is being set. If the ON/OFF status and/or the temperature setting is centrally controlled, their settings cannot be changed according to the schedule that was set from the remote controller.

12

TEMP.

A F T E

PAR-W21MAA

MONITOR/SET DAY

O F

AUTO OFF

ON/OFF

4

2 11 9

How to Set the Auto-Off TIMER

2 3 Timer Setting

A F T E R O F F

AUTO OFF

1

1. On the Normal Operation screen, make sure that “AUTO OFF” is displayed

(

1

).

If anything other than “AUTO OFF” is displayed, select the Auto-OFF timer by referring to [2]-3(3) (page 55).

2. Press and hold the TIMER MENU button 12 for

3 seconds

, so that “Set

Up” appears on the screen (

2

).

(Each press toggles between “Set Up” and “Monitor”.)

3. Press the Set Time button 11 to set the OFF time (

3

).

4. Press the CIR.WATER button 4 to save the setting.

Note:

The changes will not be saved unless the Mode (BACK) button 2 is pressed before the CIR.WATER button 4 is pressed.

5. Press the Mode (BACK) button

2

to complete the setting procedure and return to the Normal Operation screen.

6. If the unit is already running, the timer will start counting down immediately.

Make sure that the remaining time is displayed on the screen and that it is correct.

Checking the Current Auto-Off Timer Setting

4 5

Timer Setting

TIMER

AFTER OFF

AUTO OFF

1

1. Make sure that “AUTO OFF” is displayed ( 1 ).

2. Press and hold the TIMER MENU button 12 for

3 seconds

so that

“Monitor” appears ( 4 ).

• The time remaining until the unit will turn off will appear in the area

3. To close the monitor display and return to the Normal Operation screen, press the Mode (BACK) button 2 .

To Turn Off the Auto-Off Timer

• Press and hold the TIMER ON/OFF button 9 for

3 seconds

so that “Timer

Off” appears ( 6 ) and the timer value ( 7 ) disappears.

7

˚C

A F T E R

˚C

O F

6

AUTO OFF

• Alternatively, turn off the unit itself. The timer value ( 7 ) will disappear from the screen.

7

AUTO OFF

To Turn On the Auto-Off Timer

• Press and hold the TIMER ON/OFF button

9

for

3 seconds

. The “Timer

Off” will disappear ( 6 ), and the timer setting will appear on the display

( 7 ).

• Alternatively, turn on the unit. The timer value will appear in the area

7

˚C

A F T E R

˚C

O F

6

AUTO OFF

HWE14170 - 53 GB


[

IV

Remote Controller ]

[2] Function Settings

The settings for the following remote controller functions can be changed using the remote controller function selection mode. Change the settings as necessary.

Item 1

1. Display language setting

(“CHANGE

LANGUAGE”)

2. Function lock settings

(“FUNCTION

SELECTION”)

3. Basic function settings

(“MODE SELEC-

TION”)

4. Display options

(“DISP MODE

SETTING”)

Display language selection

Item 2 Item 3 (Setting content)

• Use to select the display language from available languages.

(1) Function lock (“LOCKING FUNCTION”)

(2) Operation mode skip setting (“SELECT MODE”).

• Use to lock functions.

• Use to show or hide specific modes.

(3) Temperature range limit setting (“LIMIT TEMP FUNCTION”) • Use to restrict the temperature range.

(1) Remote controller main/sub setting (“CONTROLLER MAIN/

SUB”)

(2) Use of clock setting (“CLOCK”)

(3) Timer function setting (“WEEKLY TIMER”)

(4) Contact number setting (“CALL.”)

(5) Temp offset setting (“TEMP OFF SET FUNCTION”)

(1) Temperature unit °C/°F setting (“TEMP MODE °C/°F”)

• Use to designate the remote controller as Main or Sub.

*When two remote controllers are connected to one group, one controller must be set to sub.

• Use to enable or disable the clock.

• Use to select a timer type.

• Use to show or hide, or enter the emergency contact number.

• Use to show or hide the offset value.

• Use to show or hide the temperature unit (°C or °F).

(2) Water temperature display setting (“WATER TEMP DISP

SELECT”)

• Use to show or hide the water temperature.

Function setting flowchart

[1] Stop the unit and go into the remote controller function selection mode. → [2] Select from item 1. → [3] Select from item 2. → [4] Make the setting. → [5] Return to the Normal Operation screen.

Normal Operation screen (Screen that appears when the unit is not running)

Item 1

(Press and hold the

* No settings can be changed during a test run and selfdiagnosis.

E and D buttons for two seconds.)

Display language

(“CHANGE LANGUAGE”)

Press the G button.

Remote Controller Function

Selection Mode

(Press and hold the E and D buttons for two seconds.)

* The changes made to the settings will be saved on the remote controller.

See [2]-1

Item 2

Item 3

See [2]-2. (1)

Press the

E

button.

Function lock

(“FUNCTION

SELECTION”)

Press the

G button.

Function lock setting (“LOCKING FUNCTION”)

Press the

G

button.

Operation mode skip setting (“SELECT MODE”)

Temperature range limit setting (“LIMIT TEMP FUNCTION”)

Press the

D button.

See [2]-2. (2)

See [2]-2. (3)

Press the

D button.

Press the

E button.

Press the

E button.

Press the

G

button.

Basic functions

(“MODE

SELECTION”)

Remote controller main/sub setting (“CONTROLLER MAIN/SUB”)

Press the

G

button.

Use of clock setting (“CLOCK”)

See [2]-3. (1)

Timer function setting (“WEEKLY TIMER”)

See [2]-3. (2)

See [2]-3. (3)

Press the

E button.

Contact number setting (“CALL.”) See [2]-3. (4)

Display options

(“DISP MODE

SETTING”)

Press the

G button.

Temp offset setting (“TEMP OFF SET FUNCTION”)

Temperature unit °C/°F setting (“TEMP MODE °C/°F”)

Press the

G

button.

Water temperature display setting (“WATER TEMP DISP SELECT”)

See [2]-3. (5)

Press the

D

button.

See [2]-4. (1)

See [2]-4. (2)

F

E

G

Dot display

The texts will appear in the selected language. In this manual, the texts are in English.

TEMP.

ON/OFF

MENU ON/OFF

BACK

PAR-W21MAA

MONITOR/SET DAY

CLOCK

INITIAL SETTING

TEST CHECK

CLEAR

CIR.WATER

C D H

I

A

B

HWE14170 - 54 GB


[

IV

Remote Controller ]

Settings details

[2]-1. Display language setting

The display language can be selected from the languages listed below.

• Press the [

1

MENU] button to change the language.

English (GB), 2 German (D), 3 Spanish (E), 4 Russian (RU),

5

Italian (I),

6

French (F),

7

Swedish (SW)

[2]-2. Function lock settings

(1) Function lock

• Press the [

1

2

3

ON/OFF] button to toggle through the following options.

no1: All buttons except the [ ON/OFF] button will be locked.

no2: All buttons will be locked.

OFF (Default): No buttons will be locked.

* Press and hold the [CIR.WATER] and [ ON/OFF] buttons simultaneously for two seconds on the Normal Operation screen to enable the button-lock function.

(2) Operation mode skip setting

The following modes can be made available for selection or can be hidden.

• Press the [

3

4

1

2

5

6

ON/OFF] button to toggle through the following options.

Heating mode

Heating ECO mode

Hot Water mode

Anti-freeze mode

Cooling mode

OFF (Default): All modes will be available for selection.

* The mode that is not supported on the connected unit will not be available, even if the mode is available for selection on the display.

(3) Temperature range limit setting

The temperature range for the following modes can be restricted. Once the range has been restricted, the preset temperature can only be set to a value within the restricted range.

• Press the [ ON/OFF] button to toggle through the following options.

3

4

1

2

5

LIMIT TEMP HEATING MODE

LIMIT TEMP HOT WATER MODE

LIMIT TEMP ANTI-FREEZE MODE

LIMIT TEMP COOLING MODE

OFF (Default) : The temperature ranges are not active.

• To increase or decrease the temperature, press the [ TEMP.

or

] button.

• Settable range

Heating mode : Lower limit:

Upper limit:

Cooling mode : Lower limit:

Upper limit:

30 ~55 °C

55 ~30 °C

5 ~ 25 °C

25 ~ 5 °C

(86 ~131 °F)

(131 ~ 86 °F)

(41 ~ 77 °F)

(77 ~ 41 °F)

* The settable range varies depending on the type of unit to be connected.

[2]-3. Basic functions

(1) Remote controller main/sub setting

• Press the [

1

2

Main

Sub

ON/OFF] button D to toggle between the following options.

The controller will be designated as the main controller.

The controller will be designated as the sub controller.

(2) Use of clock setting

• Press the [

1

2


(3) Timer function setting

• Press the [

3

4

1

2

ON/OFF] button

WEEKLY TIMER (Default)

AUTO OFF TIMER

SIMPLE TIMER

TIMER MODE OFF

D to toggle through the following options.

* When the use of clock setting is set to OFF, the “WEEKLY TIMER” cannot be used.

(4) Contact number setting

• Press the [

1

CALL OFF

2

CALL_

ON/OFF] button D to toggle through the following options.

CALL **** *** ****

The contact number will not be displayed when a problem occurs.

The contact number will be displayed when a problem occurs.

Use this option to enter the contact number.

• Setting the contact number

To set the contact number, follow the following procedures.

Press the [ TEMP. or ] button F to move the cursor to the right (left). Press the [ contact number.

CLOCK or ] button C to set the

(5) Temp offset setting

• Press the [

1

ON

2 OFF

ON/OFF] button

D

to toggle between the following options.

The offset value will be displayed under the water temperature initial setting mode.

The offset value will not be displayed.

[2]-4. Display options

(1) Temperature unit °C/°F setting

• Press the [

1

2

°C

°F

ON/OFF] button

Celcius

Fahrenheit

D to toggle between the following options.

(2) Water temperature display setting

• Press the [

1

2

ON

OFF


The water temperature will be displayed.

The water temperature will not be displayed.

HWE14170 - 55 GB


[

IV

Remote Controller ]

HWE14170 - 56 GB


V

Electrical Wiring Diagram

[1] Electrical Wiring Diagram................................................................................................. 59

HWE14170 - 57 GB


HWE14170 - 58 GB


[

V

Electrical Wiring Diagram ]

V

Electrical Wiring Diagram

[1] Electrical Wiring Diagram

HWE14170 - 59 GB


[

V


Power supply

3N

50/60Hz

TERMINAL

BOX

L1

TB4

L2

L3

N

FG

FANCONT

BOX

MAIN BOX

TB1

L1

L2

L3

N

L2-A N1

L1

3

2

1

4

3

2

1

CN1A

CN1B

TB21

TB22

TB23

TB24

No-voltage contact input

1 Run

2 Fan mode

4 Pump interlock

8

9

6

7

Capacity change mode

Flow switch

Outlet water temp. switching

Demand

No-voltage contact output

13

14

15

Operation display output

Error display output

Pump operation command output

16

Drain pan heater signal output

(FROM SUB BOX)

SUB BOX

Noise Filter1-1 red white black

DB1

U

Z5

R4

3 2 1

CN5 red

C11

D1 R5

R6

3 2 1

CN3 CN4 blue 3 2 1

200VAC

To M-NET

CN04(3)

To M-NET

CN04(1)

CN2

1

2

4

3

6

5

DCL1

C100

R11,R12

2

52C1

1

3 4

SC-P2 red

FT-P SC-P1 black

4

3

2

1

FT-N

CN1

C30,C32

C34,C36

C31,C33

C35,C37

R30,R32,R34 R31,R33,R35

SC-L1

SC-L2

SC-L3

CT3

DS

U

ZNR001

7 6 5 4

CN2

3 2 1

INV Board 1

C1

RSH1

IPM

SC-U

SC-V

SC-W

CN6

CN43 yellow

CNTYP

1

2

1

2

3

1

2

CT12

CT22

Discharge

Ref

temp.1

TH11

Air hex

Ref

temp.1

TH6

Outdoor temp

TH10

Water inlet temp.2

TH2

Water hex

Ref

temp.1

TH7

Water outler temp

TH3

Water inlet temp.1

TH1

Acc inlet

Ref temp.1

TH5

High pressure sensor.1

1

HP1

2 3

2

3

2

1

2

1

CNAC red

CN401

CNDC pink

F01

AC250V

3.15A T

1 2

CN404 black

CN501

3 2 1

X01

1

6

2

CN405 blue

1

5

CN502

4 3

6

X03

5

2 1

4

CN406 yellow

X02

3 2 1 4 3

CN407 red

2 1 2 1

CN408

X05

CN510

3 2

CN63HS

1

7 6 5 4 3 2 1

X04

4-way value

(EAHV only)

MV1

H1

Case heater

TERMINAL

BOX

TB6

K64 K63 K62 K61

16 15

TB2

L1

L2

L3

N

L3-A N2

L2

3

2

1

4

3

2

1

CN1A

CN1B

TB21

TB22

TB23

TB24

Noise Filter2-1

DB1

U red white black

R4

3 2 1

CN5 red

C11

D1 R5

R6

3 2 1

CN3 CN4 blue 3 2 1

CN2

4

3

1

2

6

5

DCL2

C200

R21,R22

2

52C2

1

3 4

SC-P2 red

FT-P SC-P1 black

4

3

2

1

FT-N

CN1

C30,C32

C34,C36

C31,C33

C35,C37

R30,R32,R34 R31,R33,R35

SC-L1

SC-L2

SC-L3

CT3

DS

U

ZNR001

7 6 5 4

CN2

3 2 1

INV Board 2

C1

RSH1

IPM

SC-U

SC-V

SC-W

CN6

CN43 yellow

CNTYP

1

2

1

2

3

1

2

CT12

CT22

Discharge

Ref

temp.2

TH21

Air hex

Ref

temp.2

TH26

Water hex

Ref

temp.2

TH27

Acc inlet

Ref temp.2

TH25

1

High pressure sensor.2

HP2

2 3 1

Low pressure sensor.2

LP2

2 3

High pressure switch.2

63H2

200VAC

Note1. Faston terminals have a locking function.

Press the tab in the middle of the terminals to remove them.

Check that the terminals are securely locked in place after insertion.

Note2. Remove the short circuit wire between the terminals K10 and K11 to connect a flow switch.

Note3. Be sure to connect the wires from terminals K4 and K6 to the interlock contact on the pump.

A short-circuit may cause abnormal stop or malfunctions.

Note4. Operation signals can be received from through the No-voltage contact.

Note5. Use a 4-20mA signal output device with insulation.

Feeding 30mA or more current may damaged the circuit board.

Note6. Make sure that on site terminal connection is correct.

With wrong connection,operation error may occur.

The specification of the product might be changed without a previous notice for the improvement.

2

3

2

1

2

1

CNAC red

CN401

F01

CNDC pink

AC250V

3.15A T

1 2

CN404 black

3

CN501

2

1

1

X01

6

6

5 4

CN406 yellow

3

5

CN502

4 3

X03

2 1

2 1

X02

2

CN408

1 3 2

CN63HS

1 3 2 1

CN63LS

X05

CN510

3 2

CN801 yellow

7 6 5 4 3 2 1

1

4-way value

MV2

TERMINAL

BOX

TB6

K52 K51

H2

Case heater

17

Note7. Leave a space of at least 5 cm between the low voltage external wiring

(No-voltage contact input and remote controller wiring) and wiring of 100V or greater. Do not place them in the same conduit tube or cabtyre cable

as this will damage the circuit board.

Note8. When cabtyre cable is used for the control cable wiring, use a separate cabtyre cable for the following wiring.

Using the same cabtyre cable may cause malfunctions and damage to the unit.

(a) Optional remote controller wiring

(b) No-voltage contact input wiring

(c) No-voltage contact output wiring

(d) Analog input wiring

Note9. Use a contact that takes 12VDC 1mA for No-voltage contact input.

HWE14170 - 60 GB


[

V


INV1-FAN1-6

INV1-FAN1-5

INV1-FAN1-4

INV1-FAN1-3

INV1-FAN1-2

INV1-FAN1-1

INV1-FAN1-8

INV1-FAN1-7

U

V

W

Compressor1

NC1

FANCONT BOX

A-2 A-1

2

3

1

1

2

CJ2-1

CJ1-1

1

2

3

1

2

CJ4-1

CJ3-1

1

2

3

1

2

CJ6-1

CJ5-1

R13

MF1-1

Fan motor1-1

MF2-1

Fan motor2-1

MF3-1 Fan motor3-1

3 2 1

CNDC

7 6 5 4

CNF1

3 2 1

FANCONT Board1

CN4B

2 1 6

CN2B

5 4 3 2 1

7 6 5 4

CNF2

3 2 1 7 6 5 4 3

CNF3

2 1

CN4A

2 1 6 5

CN2A

4 3 2 1

6

52C1

5

N1

L2-A

1

3

2

6

5

4

CNDP red

1

3

2

5

4

CNXB1

3 2

CNACL

1

Noise

Filter1-2

3 2

CNR1 red

1

CNDB

3

2

5

4

1

8

7

6

CNFAN

3

2

1

DB1

A-2

A-1

Low pressure sensor.1

1

LP1

2 3

High pressure switch.1

63H1

Electronic expansion valve11

LEV11

3 2 1

CN63LS red

3 2 1

CN801 yellow

6 5 4

CNLVA blue

3 2 1 3 2

CNTYP2 black

1 2 1

CN4

7 6 5 4 3 2 1

CN2

2

CN332 blue

1

Control Board1

X07

CN511 blue

7 6 5 4 3 2 1

X06 X09

CN512 yellow

7 6 5 4 3 2 1

X08

6 5

CN142D blue

4 3 2 1 4

CN402 green

3 2 1

(-)

3

CN421 black

(+)

2 1 4

CN142A black

3 2 1

2

CN52C red

1

4

CN142B blue

3 2 1 3

CN3A blue

2 1 6

CN142C

5 4 3 2 1

K60 K59 K58 K57 K56 K55 K54 K53 K15 K14 K12 K11 K13 K10

TB5

T2 T1 AN2 AN1 K03 K02 K01 K06 K05 K04 RB RA K09 K08 K07

2

CNTYP1 black

1

CN102

4 3 2 1

CNS2 yellow

2 1 5

CNIT red

4 3 2 1

R

INV1-FAN2-6

INV1-FAN2-5

INV1-FAN2-4

INV1-FAN2-3

INV1-FAN2-2

INV1-FAN2-1

INV1-FAN2-8

INV1-FAN2-7

U

V

W

Compressor2

MC2

Electronic expansion valve21

LEV21

6

52C2

5

6 5 4

CNLVA blue

3 2 1 3 2 1

CNTYP2 black

2 1

CN4

6 5 4

CN2

3 2

CN332 blue

1 2

CN52C red

1

Control Board2

2

CNTYP1 black

1 4

CN102

3 2 1

R

TH15

External water sensor

(option)

Water temp. setting or

Capacity controll signal

Analog input 4-20mA/

0-10V/1-5V/2-10V optional remote controller

To Noise Filter1-1 CN5(3)

To Noise Filter1-1 CN5(1)

4 3

CN102

2 1

3

1

2

CN04 red

M-NET Board

2 1

CNS2 yellow

A

TB3

B

5 4 3

CNIT red

2 1

A

TB7

B S

TERMINAL

BOX

TB5

B

A

S

M1

M2

B-2 B-1

2

3

1

1

2

CJ2-2

CJ1-2

1

2

3

1

2

2

3

1

1

2

CJ4-2

CJ3-2

CJ6-2

CJ5-2

MF1-2

Fan motor1-2

MF2-2

Fan motor2-2

MF3-2

Fan motor3-2

3 2

CNDC

1 7 6 5 4

CNF1

3 2 1

FANCONT Board2

CN4B

2 1 6 5

CN2B

4 3 2 1

7 6 5 4

CNF2

3 2 1 7 6 5 4

CNF3

3 2 1

CN4A

2 1 6 5

CN2A

4 3 2 1

N2

L3-A

R23

4

3

6

5

2

1

CNDP red

5

4

3

2

1

CNXB1

3 2

CNACL

1

Noise

Filter2-2

3 2 1

CNR1 red

CNDB

4

3

2

1

6

5

8

7

CNFAN

3

2

1

DB2

B-2

B-1

FANCONT BOX

HWE14170 - 61 GB


[

V


FAN control (front view)

HWE14170

SUB CIRCUIT MAIN CIRCUIT

Inside of the control box (front view)

52C2 C200 R21

R22

SUB BOX DB2 FANCONT BOX R13

DCL2

R23

DB1

Control

Board 2

Noise

Filter 2-1

INV

Board 2

Noise

Filter 2-2

Noise

Filter 1-2

52C1 C100 R11 MAIN BOX

R12

DCL1

Noise

Filter 1-1

INV

Board 1

Control

Board 1

TB2

FANCONT

Board 2

FANCONT

Board 1

TB1

M-NET

Board

S U B C I R C U I T M A I N C I R C U I T

Error Codes

No. Error code

21

22

23

24

25

26

27

28

14

15

16

17

10

11

12

13

18

19

20

35

36

37

38

39

40

41

42

29

30

31

32

33

34

43

44

45

46

7

8

9

5

6

1

2

3

4

5202

5301

0403

6500

6600

6602

6603

6606

5101

5102

5103

5105

5106

5107

5110

5111

5114

5115

5201

6607

6831

6832

6834

6833

7113,7117

1102

1138

1176

1189

1301

1302,1303

1503

1510

1512

2500

2501,2550

4102

4106

4115

4116

4122

4126

4220

4230

4240

4250

Error type

Discharge temperature fault

Hot water abnormal rise

Discharge SH fault

ACC inlet SH fault

Low pressure fault

High pressure fault

Cold water abnomal drop

Gas leak fault

Low evaporation temperature fault

Water supply cutoff (Flow switch)

Water supply cutoff (Sensor)

Open phase

Power supply fault *2

Power supply frequency fault

Fan motor fault

Fan interlock fault

Analog input error

Inverter bus voltage fault

Inverter overheat protection fault

Inverter overload protection

IPM error(inclusive)/overcurrent relay

Water inlet temp 1 thermistor error(TH1)



ACC inlet refrigerant temperature thermistor error(TH5/TH25)

Air heat exchanger refrigerant thermistor error(TH6/TH26)

Water heat exchanger refrigerant thermistor error(TH7/TH27)

Outdoor temperature thermistor error(TH10)

Discharge refrigerant temperature thermistor error(TH11/TH21)

THHS sensor/Circuit fault

External water sensor fault

High pressure sensor fault

Low pressure sensor fault

ACCT sensor fault/Circuit fault

Serial communication error

Communication error between the MAIN and SUB units

Error reset *1

Communication error between the MAIN and SUB units

(Simple multiple unit control)

Remote controller signal reception error 1

Remote controller signal transmission error


Remote controller over current

Model setting error

*1. Definition of symbols in the "Error reset"column.

Errors that can be reset

Errors that cannot be reset

Errors that will be automatically reset after the cause of the error is removed

*2. Power supply fault can be detected only when the switch setting"Automatic recovery after power supply fault "on the unit is set to "Disable." (The default setting is "Enable.")

Display setting(Control board display *)

SW3-3:OFF

High pressure

Low pressure

SW3-3:ON

High pressure

Low pressure

Inlet water temperature

Outlet water temperature

Ambient temperature

* Display settings can be either of the MAIN BOX and the SUB box.

Display is switched in the 3 second intervals.

- 62 GB


VI

Refrigerant Circuit

[1] Refrigerant Circuit Diagram ............................................................................................. 65

[2] Principal Parts and Functions .......................................................................................... 66

HWE14170 - 63 GB


HWE14170 - 64 GB


[

VI

Refrigerant Circuit ]

VI

Refrigerant Circuit

[1] Refrigerant Circuit Diagram



EAHV-P900YA(-H)

High/low pressure heat exchange


TH10

TH6

Air-side heat exchange



63H-1 HP1

Capillary tube ø3.20

Oil separator


Four-way

valve

TH5

Compressor

Accumurator

LP1

TH11



TH26


: Check joint

: Strainer

: Y bend

: Check valve



63H-2 HP2 Capillary tube ø3.20

TH25

Capillary tube ø 3.20

Four-way

valve

Oil separator

HP1,2 High pressure

LP1,2 Low pressure

63H1,2 High pressure switch

TH1

Water inlet water temp.

(upstream)

TH2


(downstream)

TH3 Outlet water temp.

TH5 ACC inlet gas temp. 1

TH6 Air heat exchanger side 1

TH7 Water heat exchanger side 1

TH10 Outdoor air temp.

TH11 Compressor discharge temp. 1





Accumurator

Compressor

LP2

TH21

LEV



EACV-P900YA

TH1

Receiver

TH7

Water-side heat exchange

MAIN Circuit

LEV

TH2

TH27

Receiver


SUB Circuit

TH3

TH10




TH6


63H-1 HP1


Oil separator


TH5

Compressor

Accumurator

LP1

TH11



TH26




63H-2 HP2


Oil separator

Capillary tube ø 3.20

TH25

Accumurator

Compressor

LP2

TH21

: Check joint

: Strainer

: Y bend

: Check valve

HP1,2 High pressure

LP1,2 Low pressure

63H1,2 High pressure switch

TH1


(upstream)

TH2


(downstream)

TH3 Outlet water temp.




TH10 Outdoor air temp.







LEV

LEV

TH1

TH7


MAIN Circuit

TH2

TH27


SUB Circuit

TH3

HWE14170 - 65 GB


[

VI


[2] Principal Parts and Functions

Part name

Compressor

Symbols

(functions)

MC

(Comp)

High pressure sensor

63HS

(HP)

Low pressure sensor

Pressure switch

63LS

(LP)

63H

Thermi stor

TH11,21

(Discharge)

Notes Usage Specifications

Adjusts the amount of circulating refrigerant by adjusting the operating frequency based on the operating pressure data

Low-pressure shell scroll compressor

Wirewound resistance

20°C[68°F] : 0.092 ohm

1) Detects high pressure

2) Regulates frequency and provides high-pressure protection Connector

63HS

1 2 3

1

2

3

Pressure

0~4.15 MPa

Vout 0.5~3.5V

0.071V/0.098 MPa

Pressure [MPa]

=1.38 x Vout [V]-0.69

Pressure

=(1.38 x Vout [V] - 0.69) x 145

GND (Black)

Vout (White)

Vcc (DC5V) (Red)

Check method

1) Detects low pressure

2) Provides low-pressure protection

Connector

63LS

1 2 3

Pressure

0~1.7 MPa

Vout 0.5~3.5V

0.173V/0.098 MPa

Pressure [MPa]

=0.566 x Vout [V] - 0.283

Pressure

=(0.566 x Vout [V] - 0.283) x 145

1

2

3

GND (Black)

Vout (White)

Vcc (DC5V) (Red)

1) Detects high pressure

2) Provides high-pressure protection

1) Detects discharge temperature

2) Provides high-pressure protection

0°C[32°F] :698kohm

10°C[50°F] :413kohm

20°C[68°F] :250kohm

30°C[86°F] :160kohm

40°C[104°F] :104kohm

50°C[122°F] : 70kohm

60°C[140°F] : 48kohm

70°C[158°F] : 34kohm

80°C[176°F] : 24kohm

90°C[194°F] :17.5kohm

100°C[212°F] :13.0kohm

110°C[230°F] : 9.8kohm

4.15MPa OFF setting

Degrees Celsius

7.465

exp

4057

1

273 t

1

393

Resistance check

HWE14170 - 66 GB


[

VI


Part name

Symbols

(functions)

Thermi stor

TH5,25

(ACC inlet Ref temperature)

Notes Usage

1) Detects suction temperature

2) Provide low pressure protection

Controls SC during cooling operation

TH6,26

(Air HEX Ref temperature)

TH7,27

(Water HEX

Ref temperature)

TH10

(Outdoor temperature)

Controls SC during heating operation

TH1-3

THHS

Inverter heat sink temperature

1) Detects outdoor air temperature

2) Controls fan and compressor operation

1) Detects water temperature

2) Controls water temperature

Provide the inverter circuit protection

Specifications

Degrees Celsius exp

3385

1

273 t

1

273

0°C[32°F] :15kohm

10°C[50°F] :9.7kohm

20°C[68°F] :6.5kohm

25°C[77°F] :5.3kohm

30°C[86°F] :4.4kohm

40°C[104°F] :3.0kohm

Degrees Celsius

R = 17 exp

4016

1

273 t

1

323

Check method

Resistance check

4-way valve

Heater

Fan motor


MV

(EAHV only)

H

FAN motor

LEV

(Refrigerant flow adjustment)

Changeover between heating and cooling or defrost

0°C[32°F] :161kohm

10°C[50°F] :97kohm

20°C[68°F] :60kohm

25°C[77°F] :48kohm

30°C[86°F] :39kohm

40°C[104°F] :25kohm

AC220 - 240V

OFF: cooling or defrost cycle

Continuity check with a tester

Heats the refrigerant in the compressor

Adjusts the operating frequency of the propeller fan based on the condensation or evaporation temperature

Belt heater 240V 45W

DC280V 187W

Adjusts refrigerant flow during heating

DC12V

Opening of a valve driven by a stepping motor 2000 pulses

Resistance check

Refer to the section

"Continuity Test with a

Tester".

Continuity between white, red, and orange.

Continuity between yellow, and blue.

White

Red

Orange

Yellow

M

Blue

HWE14170 - 67 GB


[

VI


HWE14170 - 68 GB


VII

Control

[1] Functions and Factory Settings of the Dipswitches ......................................................... 71

[2] Operating characteristics and Control Capabilities .......................................................... 85

HWE14170 - 69 GB


HWE14170 - 70 GB


[

VII

Control ]

[1] Functions and Factory Settings of the Dipswitches

1. Factory Switch Settings (Dip switch settings table)

SW Function Usage

Factory setting

MAIN circuit

SUB circuit

OFF setting ON setting

Setting timing

SW1

1

2

3

8

9

10

6

7

4

5

Settings change or view the settings

These switches are used for setting change with push switch SWP 1, 2 and 3.

OFF OFF The 7-segment LED display is changed.

Depends on the setting

3

4

1

2

Model setting

5

Water-temperature control option

Selects either the external water temperature sensor or the built-in sensor to be used to control water temperature.

Depends on the unit

OFF

-

-

L e a v e t h e s e t t i n g a s i t i s .

Built-in sensor on the unit

External water temperature sensor

A t a r e s e t

At a reset

SW2

1

6

7

8

9

1

2

3

0

M o d e l s e t t i n g

Analog input setting

Analog input signal switching

Auto restart after power failure

M o d e l s e t t i n g

Analog input type setting

Display setting *

Allows or disallows the analog signals from a remote location.

Selects either the water temperature or the capacity control ratio.

(Effective only when SW2-7 is set to ON.)

OFF

OFF

Enables or disables the automatic restoration of operation after power failure

(in the same mode as the unit was in before a power failure).

Selects analog input 4-20mA/0-10V/1-5V/

2-10V.

(Effective only when SW2-7 is set to ON.)

Switches the LED display of the control board.

(Display is switched in the 3 second intervals.)

O F F -

-

-

L e a v e t h e s e t t i n g a s i t i s .

Disallows the external analog signals.

Water temperature

Allows the external analog signals.

Capacity control ratio

ON -

An alarm will be issued when power is restored after a power outage.

The alarm will be reset when the power is turned off and then turned back on.

Automatically restores operation after power failure.

O F F L e a v e t h e s e t t i n g a s i t i s .

O F F

OFF OFF

1 / 2

4-20mA : OFF OFF

0-10V : ON OFF

1-5V : OFF ON

2-10V : ON ON

ON ON

High pressure

Low pressure

High pressure

Low pressure



Ambient temperature

A t a r e s e t

At a reset

At a reset

Any time

A n y t i m e

Any time

Any time

SW3

4

5

6

7

M o d e l s e t t i n g O F F L e a v e t h e s e t t i n g a s i t i s .

8

9 M o d e l s e t t i n g

1 0 M o d e l s e t t i n g

O

O

F

F

F

F

O F

-

F L

L e e a a v v e e t t h h e e s e s e t t t i t i n g n g a a s i t s i t

"-" in the table indicates that the function in the corresponding row will be disabled regardless of the actual switch setting.

The factory setting for these items is OFF.

i s .

i s .

A

A

A t a n n y y r t i t i e s m m e t e e

* LED display

High pressure

Inlet water temperature Ambient temperature temperature (ºC)

Low pressure

Pressure (MPa) temperature (ºC)


Pressure (MPa) temperature (ºC)

HWE14170 - 71 GB


[

VII

Control ]

2. Slide switch (SWS1) settings

Individual system (SWS1 in the SUB circuit is ineffective.)

M A I N c i r

S W S 1 S e t t i n g c u i t S U B c i r c u i t

LOCAL

O F F

REMOTE

-

-

-

U n i t O p e r a t i o n

M A I N c i r c u i t

Follows the input signal of the MAIN circuit

I g n o r e s t h e s i g n a l i n p u t

Follows the input signal fed through a No-voltage contact interface

S U B c i r c u i t




Multiple system (SWS1 in the SUB circuit is ineffective.)

S W S 1 S e t t i n g

Main module

MAIN circuit

Sub module

MAIN circuit

LOCAL

LOCAL O F F

REMOTE

OFF

REMOTE

LOCAL

OFF

REMOTE

LOCAL

O F F

REMOTE

Main module

MAIN circuit

Follows the input signal of the MAIN circuit on the Main module

Ignores the signal input

Follows the input signal fed through a dry contact interface

Main module

SUB circuit


U n i t O p e r a t i o n

Sub module

MAIN circuit

Follows the input signal of the

MAIN circuit on the Sub module



MAIN circuit on the Main module





Sub module

SUB circuit




















HWE14170 - 72 GB


[

VII

Control ]

Priority order of the water-temperature-setting-input-signal sources

Water temperature can be controlled by using the signals from the four types of input sources listed below. The setting for the item with higher priority will override the settings for the items with lower priorities. The water temperature will be controlled according to the temperature setting in the "Target water temperature" column that corresponds to a specific combination of the settings for the four items.

No-voltage contact input K04-K05 ON: Heating (EAHV-P900YA, EAHV-P900YA-H)

P r i o r i t y 1


K07-K08

P r i o r i t y 2 P r i o r i t y 3

Main board on the unit

P r i o r i t y 4


K13-K15

P r i o r i t y 5

Remote controller

PAR-W21MAA Target water temperature

Analog input

Anti freeze

Schedule setting

Ineffective

Mode change

No remote controller

-

Manual setting

Ineffective

Schedule setting

Ineffective ON Ineffective

SW2-7: ON Ineffective

Ineffective

Ineffective Ineffective Ineffective

30ºC

Temperature setting for the analog signal input

When schedule has been set

Ineffective Ineffective Ineffective Heating or Heating ECO

ON

(Heating ECO)

Ineffective Ineffective Heating ECO

OFF

SW2-7: OFF

When no schedule has been set

OFF

(Heating)

When no RC is used

-

-

-

-

-

Heating

Anti freeze

Heating ECO

Cooling (*2)

-

-

-

Heating -

-

When schedule has been set (*3)

30ºC

Heating ECO

Heating

Cooling

Target water temp is controlled according to the setting on the remote controller.

*1 If SW2-5 is set to OFF, water temperature will be controlled by the built-in thermistor TH3 on the unit.

*2 This mode is disabled in EAHV-P900YA-H.

*3 EAHV-P900YA can also set Cooling.

Sensor that becomes active

(when SW2-5 is set to ON) (*1)

TH3

TH15

TH15

TH15

TH15

TH3

TH15

TH15

TH15

TH15

No-voltage contact input K04-K05 OFF: Cooling (EAHV-P900YA, EACV-P900YA)

* When the operation mode is Cooling, K07-K08 (Anti freeze) and K13-K15 (Mode change) are disabled.

P r i o r i t y 1

Analog input

P r i o r i t y 2

Main board on the unit

Schedule setting

No remote controller

P r i o r i t y 3

Remote controller

PAR-W21MAA

Manual setting

Schedule setting

Target water temperature

SW2-7: ON Ineffective Ineffective Ineffective

Temperature setting for the analog signal input

When schedule has been set

-

Ineffective

(Cooling)

Ineffective

(Cooling)

Cooling

SW2-7: OFF

When no schedule has been set

When no RC is used

-

-

-

-

-

Anti freeze (*2)

Heating ECO (*2)

Heating (*2)

Cooling

-

-

-

-

-

Cooling

30ºC

Heating ECO

Heating

Cooling

-

When schedule has been set (*3)

Target water temp is controlled according to the setting on the remote controller.

*1 If SW2-5 is set to OFF, water temperature will be controlled by the built-in thermistor TH3 on the unit.

*2 This mode is disabled in EACV-P900YA.

*3 EAHV-P900YA can also set Heating or Heating ECO.

Sensor that becomes active

(when SW2-5 is set to ON) (*1)

TH15

TH15

TH15

TH3

TH15

TH15

TH15

TH15

HWE14170 - 73 GB


[

VII

Control ]

(1) Water-temperature setting

Different water temperature settings can be set for different modes.

Set the dip switches on the circuit board as follows to make the settings for the items described in this section.

Press the push switch SWP3 to enable the configuration changes.

Press the push switches SWP1 (↑) or SWP2 (↓) to increase or decrease the value.

When the desired value is displayed, press SWP3 to save the setting value.

Settings table

No.


■ :ON □:OFF

Setting Item

7

8

5

6

1

2

3

4

1

1

1

1

2

2

2

2

3

3

3

4

4

4

4

4

4

6

6

7 8

7 8

7 8

7 8

9

10 1

5

5

7 8

7 8

11 2 5 7 8

*1 Temperature setting increments: 1ºC

*2 No-voltage contact K10-K12: OFF

*3 No-voltage contact K10-K12: ON

9 10 Setting temp 1 (Cooling mode)

9 10 Setting temp 2 (Cooling mode)

9 10 Setting temp 1 (Heating mode)

9 10 Setting temp 2 (Heating mode)

10 Setting water temp A at Heating ECO mode

10 Setting outdoor temp A at Heating ECO mode

10 Setting water temp B at Heating ECO mode

10 Setting outdoor temp B at Heating ECO mode

10 Setting water temp C at Heating ECO mode

10 Setting outdoor temp C at Heating ECO mode

1 0 S e l e c t a h e a t i n g c u r v e

55

0

35

25

7

20

45

55

45

15

1

ºC

ºC

ºC

ºC

ºC

ºC

ºC

ºC

ºC

ºC

-

Initial value

Unit

Increments

0.1°C

0.1°C

0.1°C

0.1°C

Setting

Lower limit

Upper limit

Setting change from an optional remote controller

(PAR-W21MAA) *1

25 Possible *2 5

5

30

30

25

55

55

Possible *3

Possible *2

Possible *3

0.1°C

0.1°C

0.1°C

0.1°C

30

-30

30

-30

55

50

55

50

0.1°C

0.1°C

30

-30

55

50

0 : 2 p o i n t s y s t e m , 1 : c u r v e

Not possible

Not possible

Not possible

Not possible

Not possible

Not possible

N o t p o s s i b l e

Heating ECO (2-point system)

When the outdoor temp A and B are set to the same value.

Water temp. Water temp.

Setting water temp A

Setting water temp B



Setting outdoor temp A

* Setting temp C cannot be used.

Heating ECO (Curve)

Setting outdoor temp B

Outdoor temp.

Water temp.


Setting water temp C


Outdoor temp.

Setting outdoor temp A

Setting outdoor temp C

Setting outdoor temp B

* Always use a value for setting C that is between setting value A and setting value B.

Outdoor temp.

HWE14170 - 74 GB


[

VII

Control ]

(2) Scheduled operation

Up to three sets of start/end times can be assigned for each day.

Note Disable the schedule setting when using the remote controller.

Note The operation schedule function will operate only when SWS1 is set to "REMOTE."





Settings table

7

8

5

6

3

4

1

2

9

10

No.


■ :ON □:OFF

Setting Item

1

3

3 4

3 4

2 3 4

5

8

8

8

8

1 2 3 4

1 2 5

8

7 8

3 5 7 8

2 3 4 5 6 7 8 9

1 3 4 5 6 7 8 9

3 4 5 6 7 8 9

10 Enable/disable schedule setting

10 ON time 1 (Cooling mode without remote)

10 OFF time 1 (Cooling mode without remote)

10 ON time 2 (Heating mode without remote)

10 OFF time 2 (Heating mode without remote)

10 ON time 3 (Heating ECO mode without remote)

10 OFF time 3 (Heating ECO mode without remote)

1 0 C u r r e n t t i m e

1 0 M o n t h / D a t e s e t t i n g

1 0 Y e a r s e t t i n g

0

0000

0000

0000

0000

0000

0000

-

-

-

Initial value Unit

-

Hour: minute

Hour: minute

Hour: minute

Hour: minute

Hour: minute

Hour: minute

H o u r : m i n u t e

M o n t h : d a y

Y e a r

Setting

Increments Lower limit Upper limit

0: Disable, 1: Enable

1 minute 0000 2359

1 minute

1 minute

0000

0000

2359

2359

1 minute

1 minute

1 minute

1 m i

1

1 n u t e d a y e y a r

0000

0000

0000

0 0

0

2

1

0

0 0

0

0

1

0

2359

2359

2359

2 3 5 9

1 2 3 1

2 0 9 9

Note A mode (preset temperatures) can be selected for each operation time period. See the next page for how to make the settings.

HWE14170 - 75 GB


[

VII

Control ]

[When the operation ON/OFF times do not overlap]

Operation Period 1

Operation Period 2

Operation Period 2

Operation Period 3

Operation Period 3

Target water temp.

Heating Heating ECO

Operation Period 1

Cooling

Operation command signal

ON ON ON

If two operation periods overlap, the settings for the period with a larger number will be ineffective.

If ON time 1 and ON time 3 are set to the same value, the setting for ON time 3 will be ineffective.

[When operation period 1 and 2 overlap]

Operation Period 1

Operation Period 1

Operation Period 2

Operation Period 2

Operation Period 3

Operation Period 3

Set temp.

Cooling Heating ECO


ON

[When operation periods 1 and 3 overlap]

Operation Period 1

Operation Period 1

Operation Period 2

Operation Period 2

Operation Period 3

Set temp.

Heating Cooling

ON

Operation Period 3


ON ON

[When operation periods 2 and 3 overlap]

Operation Period 1

Operation Period 1

Operation Period 2

Operation Period 3

Set temp.

Cooling Heating

Operation Period 2

Operation Period 3


ON ON

If "ON time1 - OFF time 1", "ON time 2 - OFF time 2", "ON time 3 - OFF time 3" overlap, the settings for the period with a larger number will be ineffective.

[When operation periods 1 and 2 overlap and operation periods 2 and 3 overlap]

Operation Period 1

Operation Period 1

Operation Period 2

Operation Period 2

Operation Period 3

Operation Period 3

Set temp.

Cooling


ON

HWE14170 - 76 GB


[

VII

Control ]

(3) Peak-demand control operation

Peak-demand control is a function used to control the power consumptions of the units during peak-demand hours.

The compressor's maximum operating frequency will be controlled according to the peak-demand control signal.





Settings table

1

2

3

No.

1

2


■

4

4

4

:ON □:OFF

5 6

Setting Item

8 9 10 Maximum peak-demand capacity

7 8 10 Peak-demand control start time

7 8 10 Peak-demand control end time

Initial value

Unit

100 %

1300 Hour: minute

1300 Hour: minute

Increments

Setting

Lower limit

1%

1 minute

1 minute

60

0000

0000

Upper limit

100

2359

2359


(PAR-W21MAA)

Not possible

Not possible

Not possible

HWE14170 - 77 GB


[

VII

Control ]

(4) Remote water temperature or capacity control ratio setting input signal type

When SW2-7 is ON and SW2-8 is OFF, external analog signals can be used to set the water temperatures.

When SW2-7 and SW2-8 are ON, external analog signals can be used to set the capacity control ratio.

Analog input type can be selected from the following four types:

4-20 mA

0-10 V

1-5 V

2-10 V

Select SW3-1 and SW3-2 to set the type of analog input signal from a remote location.

Set the dip switches on the circuit board as follows to change the settings.

4-20 mA

0-10 V

1-5 V

2-10 V

SW421-1 SW421-2

ON

OFF

OFF

OFF

ON

OFF

ON

OFF

SW3-1

OFF

ON

OFF

ON

SW3-2

OFF

OFF

ON

ON

*Incorrectly setting SW421 may cause damage to the circuit board.

HWE14170 - 78 GB


[

VII

Control ]

(5) Setting the water temperature using analog signal input

When dip switch SW2-7 is set to ON (Enable external input) and SW2-8 is set to OFF, the target water temperature varies with the preset temperatures A and B and the type of analog input signal.





Settings table

No.

3

4

1

2

2

1 2

1

2


■ :ON □:OFF

4 5 6

4 5 6

7 8

7 8

8

8

Setting Item

10 Preset temp. A (Cooling)

10 Preset temp. B (Cooling)

10 Preset temp. A (Heating)

10 Preset temp. B (Heating)

Initial value

5

25

30

55

Unit

ºC

ºC

ºC

ºC

Setting

Increments Lower limit Upper limit


(PAR-W21MAA)

1ºC

1ºC

1ºC

1ºC

5

5

30

30

25

25

55

55

Not possible

Not possible

Not possible

Not possible

* Due to the resistance of the wire that is connected to the analog input, the preset temperature may not properly be sent. If this is the case, check the current value of the analog input, and adjust the output value of the connected signal output device.

Refer to the tables below for how to display the value of the analog input.

1

2

3

No.

2

1 2


■ :ON □:OFF

3

7

7

7

Monitorable items

Current value (4-20 mA)

S V v o l t a g e v a l u e ( 1 5 V )

10V voltage value (0-10 V or 2-10 V)

Unit mA

V

V

• When the water temperature setting input signal type is 4-20 mA

• External analog input signal of 6 mA: Preset temp. A

• External analog input signal of 18 mA: Preset temp. B

• External analog input signal of between 6 and 18 mA: the preset temperature will be linearly interpolated.

Preset temp B

Preset temp A

4 mA 6 mA 18 mA 20 mA

Input current

• When the water temperature setting input signal type is 0-10 V

• External analog input signal of 1 V: Preset temp. A

• External analog input signal of 9 V: Preset temp. B

• External analog input signal of between 1 and 9 V: the preset temperature will be linearly interpolated.

Preset temp B

Preset temp A

0 V 1 V 9 V 10 V

Input voltage

HWE14170 - 79 GB


[

VII

Control ]


• External analog input signal of 1.5 V: Preset temp. A

• External analog input signal of 4.5 V: Preset temp. B

• External analog input signal of between 1.5 and 4.5 V: the preset temperature will be linearly interpolated.

Preset temp B

Preset temp A

1 V 1 .5V

4.5 V 5 V

Input voltage


• External analog input signal of 3 V: Preset temp. A

• External analog input signal of 9 V: Preset temp. B

• External analog input signal of between 3 and 9 V: the preset temperature will be linearly interpolated.

Preset temp B

Preset temp A

2 V 3 V 9 V 10 V

Input voltage

HWE14170 - 80 GB


[

VII

Control ]

(6) Setting the capacity control ratio using analog signal input

When dip switch SW2-7 is set to ON (Enable external input) and SW2-8 is set to ON, the capacity control ratio varies with the type of analog input signal.

• When the water temperature setting input signal type is 4-20 mA

• External analog input signal of 6 mA: 0%

• External analog input signal of 18 mA: 100%

• External analog input signal of between 6 and 18 mA: the percent will be linearly interpolated.

Load ratio

100%

*%

0%

4 mA 6 mA 18 mA 20 mA

Input current


• External analog input signal of 1 V: 0%


• External analog input signal of between 1 and 9 V: the percent will be linearly interpolated.

Load ratio

100%

*%

0%

0 V 1 V 9 V 10 V

Input voltage


• External analog input signal of 1.5 V: 0%

• External analog input signal of 4.5 V: 100%

• External analog input signal of between 1.5 and 4.5 V: the percent will be linearly interpolated.

Load ratio

100%

*%

0%

1 V 1.5 V

4.5 V

5 V

Input voltage

HWE14170 - 81 GB


[

VII

Control ]




• External analog input signal of between 3 and 9 V: the percent will be linearly interpolated.

Load ratio

100%

*%

0%

2 V 3 V 9 V 10 V

Input voltage

*%: When the compressor frequency drops below 16 Hz, the compressor stops.

The frequency value that causes the compressor to stop varies depending on the outside temperature and water temperature.

HWE14170 - 82 GB


[

VII

Control ]

(7) Setting the supplementary heater signal output conditions

A temperature at which the signal output to operate supplementary heaters can be selected.

Supplementary heater signal output conditions

The operation command signal is ON and at least one of the following two conditions is met.

1 Water-temperature control option (SW2-5) is set to OFF, the inlet water temperature drops below a set water temperature, and the outdoor temperature drops below a set outdoor temperature.

2 Water-temperature control option (SW2-5) is set to ON, the external water temperature sensor reading (TH15) drops below a set water temperature, and the outdoor temperature drops below a set outdoor temperature.

The supplementary heater signal is output from K51-K52.

Supplementary heater signal output stop conditions

The operation command signal is OFF or at least one of the following two conditions is met.

1 The inlet water temperature is at or above a set water temperature +2°C or the outdoor temperature is at or above a set outdoor temperature +2°C.

2 External water temperature sensor reading (TH15) is at or above a set water temperature +2°C.





Settings table

No.

1

2

1 3

1 2 3


■ :ON □:OFF

7 8

7 8

Setting Item

10 Supplementary heater operation water temp

10 Supplementary heater operation outdoor temp

Initial value

Unit

40

-10

ºC

Increments

0.1ºC

0.1ºC

Setting

Lower limit

0

-30

Upper limit


(PAR-W21MAA)

55

50

Not possible

Not possible

HWE14170 - 83 GB


[

VII

Control ]

(8) Setting the drain pan heater signal output condition

A temperature at which the signal output to operate drain pan heaters can be selected.

Drain pan heater signal output condition

The following condition is met.

The outdoor temperature drops below a set outdoor temperature.

The drain pan signal is output from K63-K64.

Drain pan heater signal output stop condition

The following condition is met.

The outdoor temperature is at or above a set outdoor temperature +2ºC.


No.

1




Settings table


■ :ON □:OFF

5 6 8

Setting Item

10 Drain pan heater operation outdoor temp

Initial value

Unit

0 ºC

Increments

1ºC

Setting

Lower limit

-40

Upper limit

20


(PAR-W21MAA)

Not possible

HWE14170 - 84 GB


[

VII

Control ]

[2] Operating characteristics and Control Capabilities

Outline of Control Method

-1- Operating characteristics

Function

Unit protection

Component

Pressure switch

High-pressure switch

Symbol

63H

HP

Control/

Detection

HP

HP

Action

Unit

ON MPa

OFF MPa

OFF MPa Pressure sensor

High-pressure sensor

Low-pressure sensor

Compressor overcurrent relay

LP LP

Trigger condition

(3.25)

4.15

3.9

OFF MPa



The low pressure has dropped below 0.1 MPa.



During water cooling, the low pressure has dropped below 0.56 MPa.

OFF A 33

Fan overcurrent protection

Thermistor

Discharge refrigerant temp.

(Discharge temp. overrise protection)

Outlet water

TH11

TH21

TH3

Compressor current

Fan current

Discharge gas temp.

Limit A

OFF ºC

1.9



If a discharge gas temperature of 120ºC or above was detected three times in 1 hour, the unit will make an abnormal stop.

OFF ºC An outlet water temperature of 3ºC was detected.

Pump control

Air-side HEX refrigerant temp.

Water-side HEX refrigerant temp.

TH6

TH26

TH7

TH27

ACC inlet refrigerant temp.

TH5

TH25

Inverter heatsink temp.

THHS

Water temperature thermister TH1-3

Freeze-up protection circuit

Outlet water temp.

(cooling)

Outlet water temp.

(heating)

SC

(cooling)

SC

(heating)

SH

INV. heatsink temp.

Water temp.

OFF ºC An outlet water temperature of -65ºC was detected.

-

-

ºC

ºC

-

-

OFF ºC ACC inlet SH above 20ºC has been detected for 10 minutes.

OFF ºC A temperature above 95ºC has been detected for

10 minutes.

ON ºC

OFF ºC

3

5

The pump turns on when the water temperature has reached below the "ON" threshold when the compressor is stopped.

HWE14170 - 85 GB


[

VII

Control ]

Startup sequence rotation

-2- Initial control



When the power is turned on, the initial processing of the microcomputer is given top priority.



During the initial processing, processing of the operation signal is suspended and is resumed after the initial processing is completed.

(Initial processing involves data processing by the microcomputer and initial setup of the LEV opening. This process takes up to one minute.)



During the initial processing ”



During the initial processing ”

” will appear on the LED monitor on the MAIN board of the MAIN circuit.

” will appear on the LED monitor on the MAIN board of the SUB circuit.

Initial Control

-3- Compressor frequency



The upper limit of frequency during the first 60 seconds of operation is 20 Hz.



The upper limit of frequency during the first 180 seconds of operation is 50 Hz.



For 180 seconds after the startup, the compressor will be controlled every 15 seconds so that the frequency fluctuation will be kept within ± 20% of the current frequency.



The amount of frequency change is controlled to approximate the target value that are determined based on the temperature difference between the current and the preset water temperatures.



The minimum operating frequency is 16 Hz.



The maximum frequency will be determined based on the outlet water temperature during cooling or the outdoor temperature during heating.

Heating

120

110

100

90

80

70

60

50

40

30

20

10

0

-15

Capacity priority

COP priority

-5 5 15 25

Outdoor temp. [

°C

]

35 45

Cooling

120

110

100

90

80

70

60

50

40

30

20

10

0

0

Capacity priority

COP priority

5 10 15 20

Outlet water temp. [ °C ]

25 30

HWE14170 - 86 GB


[

VII

Control ]

Bypass Control

Compressor Frequency Control

-4- Defrost operation

Defrost operations will be performed simultaneously in both circuits that meets the defrost-start condition below.

Defrost-start conditions

1) Ten minutes have passed since the compressor started up.

2) Forty minutes have passed since the unit received an operation command signal.

3) Cumulative compressor operation time after the completion of the last defrost cycle has reached 40 minutes.

4) The ACC inlet refrigerant temperature is equal to or below the defrost-start temperature. (See the figure at right.)

5) Inlet water temperature is above 15ºC.

0

-5

-10

-15

-20

-25

-30

-20 -15 -10 -5 0

Outdoor temp. (°CDB)

5 10 15

The defrost cycle will end when one of the following conditions is met.

1) Twenty seconds have passed since the beginning of the defrost cycle or later, the high-pressure has reached 3.0 MPa or above.

2) The inlet water temperature has dropped below 15 ºC.

3) Fifteen minutes have passed since the beginning of the defrost start.

4) When the operation command signal is off.

Bypass Control

-5- Outdoor unit fan

The fan's rotation speed will be controlled to approximate the values in the graph below that are obtained based on the outdoor temperature and the low pressure during heating or the high pressure during cooling.

Heating

60

50

40

30

20

10

0

-15 -5 5 15

Outdoor temp. [ °C ]

25 35 45

Cooling

60

50

40

30

Compressor frequency

94Hz

80Hz

60Hz

40Hz

20Hz

20

10

0

-15 -5 5 15 25

Outdoor temp. [ °C ]

35 45

HWE14170 - 87 GB


[

VII

Control ]

-6- LEV in the main circuit

Operating range of the LEV

The opening range of the LEV is between 100 and 2000 (fully open).

LEV operation speed



Open 100 plus/sec



Close 200 plus/sec

At startup



During startup, the valve will be moved to the Initial Setting.

During operation



After startup, the LEV opening will be controlled every 20 seconds according to the changes in compressor frequency, pressure, and temperature.



The LEV will be controlled to keep the suction SH in 5K.



If the low pressure reaches 1.45 MPa or above, the MOP function will be triggered to keep the low pressure from rising too high.

Refrigerant Recovery Control

-7- Operation during power failure

Duration of power failure 20 ms or shorter

Detection of power failure Undetectable

20 ~ 200ms

Instantaneous power failure

Operation during power failure Normal operation

Operation after power is restored

Automatic restoration after power failure is set to "Enabled" (SW2-9 is set to ON.)

Normal operation

200 ms or longer

Detection of power failure

During an instantaneous power failure, the unit will be controlled according to the input status of the circuit board immediately before the instantaneous power failure.

All outputs will be turned off immediately after power failure.

The circuit board will start receiving input.

The unit will be controlled according to the input status of the circuit board immediately before the power failure, except that the input status of the Novoltage contact after the power is restored will override the one before the power failure. For three minutes after the power is restored, the unit will not operate.

Automatic restoration after power failure is set to "Disabled" (SW2-9 is set to OFF.)

The unit will stop, displaying the error code for power failure.

The error will be cleared when the operation command signal is off.

HWE14170 - 88 GB


[

VII

Control ]

-8- Anti-short-cycling protection

The unit has a 3-minute restart-delay function to protect the compressor from short-cycling. This function is effective even after a power failure.

3-minute restart delay function

Min. 3 minutes

The 3-minite restart-delay function will be triggered in the following situations:

(1) The setting for the SWS1 (Local,

Off, Remote) was changed, or (2) after a power failure.

Compressor

ON

OFF

Time

The unit has a function to keep the compressor from short-cycling when the amount of circulating water is low or when the load is light. After the compressor cycles off, it will not restart for 12 minutes.

Min. 12 minutes

Compressor

ON

OFF

ON for

9 minutes

3 minutes

15 minutes

ON for

12 minutes

12 minutes

3 minutes

ON for

4 minutes

ON for

8 minutes

Time

HWE14170 - 89 GB


[

VII

Control ]

Control Method

-9- Automatic operation of pump for freeze-up protection

1. Purpose

This is a function to protect the water circuit from freezing up in winter.

CN510

7 6 5 4 3 2 1

K62 K61

TB6

M

3

~

MP

52P

52P

F

PL

Pump error

ELB

L1 L2 L3 N power supply

3N ~

50Hz

380/400/415V

Control method

Details

Natural freeze-up protection based on the water temperature

Pump start conditions Water temperature is within 3 ºC

Pump stop conditions Water temperature is more than 5 ºC

HWE14170 - 90 GB


[

VII

Control ]

Cooling/heating Circuit Control and General Function of System Equipment

-10- Water-temperature control

Water temperature can be controlled in the following way.

Outlet-water-temperature-based control

SW2-5

OFF

(Factory setting)

Water temperature control based on the external water temperature reading

ON

1. When the units are restarted after stopping for under a condition other than Thermo-OFF

Conditions for the units to stop other than the Thermo-OFF condition



Pump interlock is off.



When one of the units in a set is forced to stop



When the units were stopped under the following conditions:

1. Outlet water temperature has reached 57ºC (Heating)

2. Outlet water temperature has reached 3.6ºC (Cooling) sensor

Built-in thermistor

External water temperature

Control method



Thermo-ON conditions

Outlet water temperatures < 52 ºC (Heating)

OR

Outlet water temperatures > 8.6 ºC (Cooling)

External water temperature < 52 ºC (Heating)

OR

External water temperature > 8.6 ºC (Cooling)

HWE14170 - 91 GB


[

VII

Control ]

DIFF1 = 2 ºC (Initial setting)

DIFF2 = 2 ºC (Initial setting) sensor

Built-in thermistor


Control method


Water temperature control based on the external water temperature reading

Thermo-ON conditions

Outlet water temperature is below the

"Preset temperature - DIFF1 (ºC)".

(Heating)

OR

Outlet water temperature is greater than "Preset temperature + DIFF1

(ºC)". (Cooling)

Except the short-cycling protection mode.

Thermo-OFF conditions

Outlet water temperature is greater than the "Preset temperature + DIFF2 (ºC)".

(Heating)

OR

Outlet water temperature is below the

"Preset temperature - DIFF2 (ºC)".

(Cooling)

At least 60 seconds have passed since the last Thermo-ON.

External water temperature is below the "Preset temperature - DIFF1 (ºC)".

(Heating)

OR

External water temperature is greater than "Preset temperature + DIFF1 (ºC)".

(Cooling)

Except the short-cycling protection mode.

External water temperature is greater than the "Preset temperature + DIFF2

(ºC)". (Heating)

OR

External water temperature is below the "Preset temperature - DIFF2 (ºC)".

(Cooling)

At least 60 seconds have passed since the last Thermo-ON.

1) Thermo-ON/OFF temperature conditions



Water temperature control

Heating

Thermo-OFF temperature

DIFF2( °C)

Target temp.

Cooling

Outlet water temperature changes 2


Preset water temperature

(A Variable frequency of the compressor)




Target temp.

DIFF2( °C)


When the water temperature is controlled based on the outlet water temperature, compressor frequency will be controlled in the way that the target water temperature will be maintained.

2) Thermo-ON/OFF conditions (time)


Temperature changes

Thermo-

ON

The unit will stay in operation of 60 seconds after the unit went into when the Thermo-ON conditions were met.

Thermo-

OFF


The unit will remain stopped if the anti-shortcycling protection is in effect.

1.The unit will remain stopped for 3 minutes after the unit stopped when the Thermo-OFF conditions were met.

2.After the compressor stops, it will remain stopped for 12 minutes.

Refer to section -8- "Anti-short-cycling protection"

(page 89) for detailed information about anti-short-cycling protection function.

HWE14170 - 92 GB


[

VII

Control ]

Operation Mode

-11- Controlling the operation of unit using external water temperature sensors

The water temperature can be controlled using the built-in sensor on the unit or a separately sold external water temperature sensor.

The factory setting for the sensor option is "built-in sensor on the unit." (SW2-5: OFF)

To control the water temperature with an external water temperature sensor, set SW2-5 to ON.

(Note) If the setting for the dip switch is changed, reset the power supply to enable the setting.

A separately sold water temperature sensor "TW-TH16" will be required to control the water temperature based on the external water temperature reading.

Install the external water temperature sensor and wiring according to the instructions on the next page.

Operation Mode

-12- Remote water temperature setting input signal type

By setting SW2-7 to ON, external analog signals can be used to set the water temperatures.

Analog input type can be selected from the following four types:

4-20 mA

0-10 V

1-5 V

2-10 V

HWE14170 - 93 GB


[

VII

Control ]

External water temperature sensor TW-TH16

1. Parts that are required to install an external water temperature sensor

(1) External water temperature sensor

(2) Wiring to connect the sensor and the unit*

(3) Wiring terminals to connect the wiring to the sensor and the terminal block on the unit

(Four for M4 screws)*

*Items (1) and (2) are field supplied.

2. Installing the external water temperature sensor



Install the external water temperature sensor where the water pipes merge or on the load-side tank as shown in the figure at right.



Install horizontally or vertically on top of the pipe.



When installing horizontally, make sure the wire faces down.

Wire specifications

Wire size

Type

2-core cable Min. 1.25 mm

CVVS or CPEVS

Maximum length 20 m

2

Vertical installation Horizontal installation

3. Wiring the external water temperature sensor

Connect the external temperature sensor wiring to the terminal block in the control box on the unit as shown in the figure below.

External water temperature sensor

Sensor wire

157

Note

20 12

12-pin terminal block in the control box on the unit

T1 T2

(Note)

Run the sensor wiring at least 5 cm away from any wire that carries a voltage of 100 V or more, and do not put the sensor wiring in the same conduit tube with it.

Control box

Unit

M4 screws × 3

Terminal screws

BB A

42 54

ø

78

6

5

Sensor

Sensor properties

R 1/2

· Resistance: R=15KΩ±3% (0 °C)

· B-constant: 3460K

Terminal block for connection to the sensor

A

Connect the sensor wiring to terminals T1 and T2 of the 12-pin terminal block in the control box on the unit.

Connect the shield to the earth terminal.

Thread the wire to the external water temperature sensor through parts

Cut the shield wire. Do not connect it to the terminal. (Connect the shield on the unit side to the ground terminal.)

1 Field-supplied wire

Detailed view of the area labeled "A" in the figure above from entering.

2

Water-sealing rubber

(Internal diameter ø11)

3 Washer (Internal diameter ø12)

4 Tightening screw

(Internal diameter ø15)

Shield (to be cut)

HWE14170 - 94 GB


VIII

Test Run Mode

[1] Items to be checked before a Test Run ........................................................................... 97

[2] Test Run Method ............................................................................................................. 99

[3] Operating the Unit.......................................................................................................... 100

[4] Refrigerant ..................................................................................................................... 101

[5] Symptoms that do not Signify Problems ........................................................................ 101

[6] Standard operating characteristics (Reference data) .................................................... 101

HWE14170 - 95 GB


HWE14170 - 96 GB


[

VIII

Test Run Mode ]

[1] Items to be checked before a Test Run

(1) Check for refrigerant leak and loose cables and connectors.

(2) Measure the insulation resistance between the power supply terminal block and the ground with a 500V megger and make sure it reads at least 1.0Mohm.



Do not operate the unit if the insulation resistance is below 1.0Mohm.



Do not apply megger voltage to the terminal block for transmission line. Doing so will damage the controller board.



Never measure the insulation resistance of the transmission terminal block for the RA,RB,MA,MB(TB3). Do not attempt to measure the insulation resistance of TB7.



The insulation resistance between the power supply terminal block and the ground could go down to close to 1Mohm immediately after installation or when the power is kept off for an extended period of time because of the accumulation of refrigerant in the compressor.



If insulation resistance reads at least 1Mohm, by turning on the main power and powering the belt heater for at least 12 hours, the refrigerant in the compressor will evaporate and the insulation resistance will go up.



Do not measure the insulation resistance of the terminal block for transmission line for the unit remote controller.

Securely tighten the cap.

(3) Check the phase order of the 3-phase power source and the voltage between each phase.

Open phase or reverse phase causes the emergency stop of test run. (4102 error)

(4) When a power supply unit is connected to the transmission line for centralized control, perform a test run with the power supply unit being energized.

(5) Pre-energize the compressor.

A.

A case heater is attached to the bottom of the compressor to prevent the refrigerant oil from foaming when starting up. Switch on the power to the case heater and keep it turned on for

at least 12 hours

before starting a test run.

(Compression of liquid refrigerant that may happen if the unit is started up without pre-energizing the compressor may damage the valve or cause other problems. When foaming is happening, the compressor will make cracking sounds for a few seconds at the beginning of operation.)

B.

Supply water to the water circuit before operating the pump. Operating the pump without water may damage the shaft seal.

(6) Check the pressure.

Translate the pressure readings into saturating temperatures, and make sure these values fall into the ranges specified in the table below.

Condensing and evaporating temperatures during operation

During normal operation (outdoor temperature: between -15 ºC and +43 ºC)

Saturation pressure equivalent to refrigerant pressure Heating Cooling

Condensing temperature Outlet water temperature + (0 - 5 °C) Outdoor temperature + (3 - 8 °C)*

Evaporating temperature 5 - 11 °C Outlet water temperature. - (0 - 5 °C)

* To maintain proper compression ratio, when the outdoor temperature is below 20 ºC, condensing temperature may

exceed "(Outdoor temperature) - 8 ºC"

(7) Check that the correct voltage is applied.

Check that the voltage that is applied while the unit is stopped and the load-side voltage of the solenoid contactor in the relay box during operation are within the voltage ranges. Check the voltage in all phases (L1, L2, and L3), and make sure that the voltage imbalance between the phases is 2% or less.

(8) Check either the power supply current or the compressor current.

Check the compressor current in all phases (L1, L2, and L3).

(9) Check for short-cycling of discharge air.

Check that the intake air temperature is not unusually higher or lower than the outside temperature. During operation, the difference between the heat exchanger inlet temperature and outside temperature should be 1 ºC or less.

HWE14170 - 97 GB


[

VIII

Test Run Mode ]

(10) Check for proper circulating water flow rate.

Measure the circulating water flow rate, if possible. If it is not, check that the temperature difference between the outlet and inlet temperatures is between 3 and 10 ºC. A temperature difference of 12 ºC or more indicates not enough water flow. Check for air pockets in the pipe, and make sure that the pump has the appropriate capacity for the circuit.

(11) Check that the unit is operating properly according to the temperature adjustment function.

When a start-up operation is completed, check that the hot water temperature adjustment function will come on and that the unit will automatically go on and off. Make sure the ON/OFF cycle (beginning of an operation until the next) is at least 12 minutes. (The unit features an anti-short-cycling protection.)

Notes on temperature adjustment function

The water temperature can be controlled based on the inlet or the outlet temperature sensor reading. Select one to use. Refer to "VII [1]1.Factory Switch Settings (Dip switch settings table) (page 71) and "(1)Water-temperature setting"(page 74) for how to select the water temperature control method and how to set the water temperature.

Do not disconnect the power wire to the compressor in an attempt to keep the compressor from going into operation during test run. (If it is done, the control board will not sense that the compressor is stopped, and the water temperature will not be controlled properly and the unit may come to an abnormal stop.)

(12) Connect the pump-interlock wire to the appropriate contacts.

1) Connecting the pump-interlock wire

Connect the pump-interlock wire to the pump-interlock circuit (Terminal block K04 and K06). The unit will not operate unless this circuit is complete.

2) Notes on connecting the pump-interlock wire



Connect an NO relay (solenoid switch) for the pump.



This circuit is a low-voltage circuit. Keep the pump-interlock wire at least 5 cm away from any wire that carries a voltage of

100 V or above to avoid damage to the circuit board.

L1 L2 L3 N

Control box on the unit

K04

52P

F

52P

51P

5

K62

3

7

Control board on the unit

K61

1

K06

52P

PL pump fault

51P

M

3

MP

Recommended pump circuit

(13) Checking the rotation direction of the pump

Check that the circulating water pump is rotating in the correct direction. If the pump is rotating in the wrong direction, disconnect the pump wiring from the solenoid switch, and reconnect them so that the pump will rotate in the correct direction.

HWE14170 - 98 GB


[

VIII

Test Run Mode ]

[2] Test Run Method

1

2

3

4

TEMP.

ON/OFF

MENU

BACK MONITOR/SET

PAR-W21MAA CLOCK

ON/OFF

DAY

INITIAL SETTING

CHECK TEST

CIR.WATER

CLEAR

5

11

10

9

8

7

6

1

2

3

4

5

6

7

8

[Set Temperature] buttons ( Down/ Up buttons)

[TIMER MENU] button (MONITOR/SET button)

[Mode] button (BACK button)

[Set Time] buttons ( Back/ Ahead buttons)

[TIMER ON/OFF] button (DAY button)

[CHECK] button (CLEAR button)

[TEST RUN] button

Not available

9

10

[CIR. WATER] button ( <Enter> button)

[INITIAL SETTING] button ( Down/

11 [ON/OFF] button

* Opening the lid.

Up buttons)

Operation procedures

"PLEASE WAIT" appears on the LCD for up to five minutes. Turn on the main power.

Set the water temperature to a temperature at least 5 ºC above the current settings.

Press the

11

ON/OFF button to start operation.

Run

To stop the operation, press the

11

ON/OFF button.

Stop

Note 1: Refer to the following pages if an error code appears on the remote controller or when the unit malfunctions.

HWE14170 - 99 GB


[

VIII

Test Run Mode ]

[3] Operating the Unit

1. Initial Operation

(1) Make sure the Run/Stop switch that controls the unit on the local control panel is switched off.

(2) Switch on the main power.

(3) Leave the main power switched on for at least 12 hours before turning on the Run/Stop switch that controls the unit on the on-site control panel to warm up the compressor.

(4) Switch on the Run/Stop switch that controls the unit on the on-site control panel.

2. Daily Operation

To start an operation

Switch on the Run/Stop switch that controls the unit on the local control panel, or press the ON/OFF button on the remote controller. (*1)

Note

The unit described in this manual features a circuit that protects the compressor from short-cycling. Once the compressor stops, it will not start up again for up to 12 minutes. If the unit does not start when the ON/OFF switch is turned on, leave the switch turned on for 12 minutes. The unit will automatically start up within 12 minutes.

To stop an operation

Switch off the Run/Stop switch that controls the unit on the on-site control panel, or press the ON/OFF button on the remote controller. (*1)

*1 Refer to [2] Test Run Method (page 99) for how to use the remote controller.

IMPORTANT

• Keep the main power turned on throughout the operating season, in which the unit is stopped for three days or shorter (e.g., during the night and on weekends).

• Unless in areas where the outside temperature drops to freezing, switch off the main power when the unit will not be operated for four days or longer. (Switch off the water circulating pump if the pump is connected to a separate circuit.)

• When resuming operation after the main power has been turned off for a full day or longer, follow the steps under

“Initial Operation” above.

• If the main power was turned off for six days or longer, make sure that the clock on the unit is correct.

3. Operating the unit from the control board on the unit.

(1) To start the unit

Set the switch SWS1 on the circuit board to "LOCAL."

(2) To stop the unit

Set the switch SWS1 on the circuit board to "OFF."

HWE14170 - 100 GB


[

VIII

Test Run Mode ]

[4] Refrigerant

Unit type

Refrigerant type

Refrigerant charge

EAHV/EACV-P900YA

R410A

19kg × 2

[5] Symptoms that do not Signify Problems

Symptom

Fan does not stop while stopping operation.

Remote controller display

Extinguished

Cause

If terminals K01 and K03 on TB5 are short-circuited, the fan will be forced to operate even after the compressor has stopped.

The display shown right will appear on the unit remote controller for about 5 minutes when the main power source is turned on.

"PLEASE WAIT" ("HO") blinking display

The system is under starting up.

Operate the remote controller after the blinking of

“PLEASE WAIT” (“HO”) is disappeared.

[6] Standard operating characteristics (Reference data)

Reference data

Ambient temperature

Temperature

Pressure

LEV opening

Compressor

Fan

DB

WB

Discharge refrigerant

ACC inlet refrigerant

Water heat exchanger refrigerant

Air heat exchanger refrigerant

Outdoor temperature



High pressure

Low pressure

Main circuit

Frequency

Frequency

°C

°C

MPa

MPa pulse

Hz

Hz

°C

°C

°C

°C

°C

°C

°C

40

45

2.81

0.77

1180

94

57

Heating

7

6

80

3

43

1

7

12

7

3.03

0.94

1300

94

57

Cooling

35

24

82

37

35

9

7

HWE14170 - 101 GB


[

VIII

Test Run Mode ]

HWE14170 - 102 GB


IX

Troubleshooting

[1] Maintenance items......................................................................................................... 105

[2] Troubleshooting ............................................................................................................. 108

[3] Troubleshooting Principal Parts ..................................................................................... 113

[4] Refrigerant Leak ............................................................................................................ 128

[5] Parts Replacement Procedures ..................................................................................... 129

HWE14170 - 103 GB


HWE14170 - 104 GB


[

IX

Troubleshooting ]

IX

Troubleshooting

[1] Maintenance items

Check the contents in the maintenance tool.

Input

Water temp Ctrl

Main Water temp Ctrl

Multi Ctrl

Temp setting

On/Off setting

-

-

-

-

-

IN Inlet water temperature emperature control

OUT Outlet water temperature based control

ON Built-in sensor on the unit

OFF External water temperature sensor

ON Multiple Ctrl , OFF Individual control

ON Effective , OFF Invalid

ON Enable schedule setting

Status

On/Off Ctrl

Fan Mode

Defrost Mode

Demand

Restart Lim

Remain

( min

)

Pre err

( cnt

)

Err code

Detail

Total

( hr

)

Mode

Schedule

-

-

-

-

-

-

-

-

-

-

-

-

Run/Stop

ON Control fan

Other/Wait/Limit/On

ON Control demand

ON Control restart

Restart (minute)

Error count

Error content

(

M-NET code

)

Detail error code

Total hour

Heating/Heating Eco/Cooling/Anti Freeze

ON Control schedule

Schedule

Mark

Time

Thr-diff1

Thr-diff2

Demand ( max%)

Demand

On/Off1

On/Off2

On/Off3

Setting temp1

Setting temp2

Setting temp3

Official Name

-

-

-

-

-

-

-

Peak-demand control

Scheduled operation 1



Meaning

Current Time

Thermo differential 1

Thermo differential 2

M a x i m u m c a p a c i t y d e m a n d [ % ]

Start time - End time

Operation start time 1 - Operation end time 1



Water temp. setting 1



Input(CN142)

Mark Official Name Meaning

A1

A3

B1

B3

C5

C6

RUN

Fan Mode

Cooling/Heating switching

Pump Interlock

Anti-Freeze

Capacity

Run/Stop

Forced/Normal

ON Heating/OFF Cooling

Normal/Error

ON/OFF

ON COP priority/OFF Capacity priority

D3

D4

Flow Switch Normal/Error

Outlet water temp. switching

ON 2nd(temp.2)/OFF 1st(temp.1)

D5 Demand ON/OFF

D6 Mode Eco/Heating

Output

Mark

X01

Official Name

MAIN BOX=-

SUB BOX=

Meaning

MAIN BOX=Solenoid valve(4-way valve)

SUB BOX=Solenoid valve(4-way valve)

HWE14170 - 105 GB


[

IX

Troubleshooting ]

X02

X03

X04

X05

X06

X07

X08

X09

MAIN BOX=-

SUB BOX=

MAIN BOX=

SUB BOX=

MAIN BOX=-

SUB BOX=

MAIN BOX=-

SUB BOX=

MAIN BOX=-

SUB BOX=-

MAIN BOX=-

SUB BOX=-

MAIN BOX=-

SUB BOX=-

MAIN BOX=-

SUB BOX=-

MAIN BOX=Case heater(for heating the compressor)

SUB BOX=Case heater(for heating the compressor)

MAIN BOX=-

SUB BOX=-

MAIN BOX=Pump operation command output

SUB BOX=-

MAIN BOX=Drain pan heater signal output

SUB BOX=Supplementary heater signal output

MAIN BOX=Operation display output

SUB BOX=-

MAIN BOX=Error display output

SUB BOX=-

MAIN BOX=Defrost signal output

SUB BOX=-

MAIN BOX=Cooling/Heating operation display output

SUB BOX=-

12Voutput

Mark Official Name Meaning

52C relay(Inverter

Unit condition Unit1 to Unit6

TH1

TH2

TH3

TH5

TH6

TH7

TH10

TH11

TH15

THc1

THc2

Twi

Two

Twg

Tout

SHs

SCs

SH

THc3

THc15

63H1

HP

LP

Vdc

Iu

Iw

Ts

SC

Td-SH

THHS

LEV1

COMP1(Hz)

FAN1(Hz)

FAN2(Hz)

FAN3(Hz)

4-20mA1

0-10V

1-5V

Thermistor

-

Thermistor

Thermistor

Thermistor

Thermistor

Thermistor

-

Thermistor

Thermistor

Thermistor

-

-

-

-

-

-

-

-

-

-

-

-

-

-

63HS

63LS

-

-

-

-

-

-

-

-

-

-

Thermistor

Water inlet temp. 1

Water inlet temp. 2

Water outlet temperature

ACC Inlet Ref temperature

Air hex Ref temperature

Water hex Ref temperature

Outdoor temperature

Discharge Ref temperature

External Water sensor

Water Inlet temp. 1 compensation TH1

Water Inlet temp. 2 compensation TH2

Water Outlet temperature compensation TH3

External water temperature compensation TH15



Low pressure sensor

COMP bus voltage [V]

Phase-U current of compressor [A]

Phase-W current of compressor [A]


Current inlet water temperature

Current outlet water temperature


Outdoor temperature

Target superheat value at the ACC inlet pipe

-

Target subcool value at the condenser outlet pipe

-

Superheat value at the discharge pipe

IGBT temperature

Electronic expansion valve(Main/Sub circuit)

Operating frequency in main circuit [Hz]

Operating frequency of fan moter1 [Hz]



External analog input for Target water temp (4-20mA1)

External analog input for Target water temp (0-10V/2-10V)

External analog input for Target water temp (1-5V)

HWE14170 - 106 GB


[

IX

Troubleshooting ]

2. Operation status before error

Check the contents in the maintenance tool.

Time of data storage before error

Ver

TH1

TH2

Iu

Iw

Ts

Twi

Two

Twg

TH3

TH5

TH6

TH7

TH10

TH11

TH15

HP

LP

Vdc

SHs

SCs

SH

SC

Td-SH

THHS

LEV1

COMP1(Hz)

FAN1(Hz)

FAN2(Hz)

FAN3(Hz)

4-20mA1

0-10V

1-5V

Software Version

Thermistor

Thermistor

-

-

-

-

-

-

-

-

-

-

-

-

-

Thermistor

-

-

-

-

-

-

Thermistor

Thermistor

Thermistor

Thermistor

Thermistor

Thermistor

Thermistor

-

63HS

63LS

Program ROM

Water inlet temp. 1

Water inlet temp. 2

Water outlet temperature

ACC Inlet Ref temperature

Air hex Ref temperature

Water hex Ref temperature

Outdoor temperature

Discharge Ref temperature

External Water sensor


Low pressure sensor

COMP bus voltage [V]

Phase-U current of compressor [A]

Phase-W current of compressor [A]


Current inlet water temperature

Current outlet water temperature


-

Target superheat value at the ACC inlet pipe

-

Target subcool value at the condenser outlet pipe

Superheat value at the discharge pipe

IGBT temperature

Electronic expansion valve(Main/Sub circuit)

Operating frequency in main circuit [Hz]




External analog input for Target water temp (4-20mA1)

External analog input for Target water temp (0-10V/2-10V)

External analog input for Target water temp (1-5V)

HWE14170 - 107 GB


[

IX

Troubleshooting ]

[2] Troubleshooting

Troubleshooting according to the remote controller malfunction or the external input error

Both for MA remote controller and ME remote controller

1. If a problem occurs, please check the following. If a protection device has tripped and brought the unit to stop (when an error code is blinking on the LED), resolve the cause of the error before resuming operation.

Resuming operation without removing the causes of an error may damage the unit and its components.

Problem Check item

The unit does not operate.

The fuse in the control box is not blown.

The power lamp on the circuit board is not lit.

Cause

The main power is not turned on.

The fuse in the control box is blown.

The compressor does not operate.

Solution

Switch on the power.

The power lamp on the circuit board is lit.

The pump interlock circuit is not connected.

The flow switch wiring is not connected.

Short-circuited circuit or ground fault Measure the circuit resistance and the earth resistance.

Protection devices have not tripped.

High-pressure cutout switch has tripped.

1303

The discharge temperature thermistor has tripped.

1102

INV board problem

Water flow shortage

LEV fault in the main circuit

Refrigerant gas leakage

Refrigerant undercharge

Repair or replace the INV board.

Noise filter board problem

Abnormal high pressure

Dirty condenser

(scaling formation)

Repair or replace the noise filter board.

Clean the condenser.

Air in the refrigerant circuit Vacuum the refrigerant circuit, and charge it with refrigerant.

Secure enough water flow rate.

Replace the LEV in the main circuit.

A thermistor error was detected.

5101~5115

Overcurrent passed through the compressor.

4250

The pump interlock has tripped.

Broken or short-circuited thermistor wiring

Compressor motor

Overload operation

Seized compressor shaft

The pump interlock circuit is not connected.

Connect the pump interlock circuit wiring to the system.

Connect the flow switch wiring to the system.

Resolve the cause, and replace the fuse.

Leakage test

Repair the cause of refrigerant shortage, evacuate the system, and charge the refrigerant circuit with refrigerant.

Check the thermistor wiring for broken connections or short circuit.

Replace the thermistor.

Replace the compressor.

Check the operation patterns.


Connect the pump interlock wiring.

The flow switch has tripped.

Automatic Start/Stop thermistor has tripped.

The motor whines, but will not turn.

A momentary overcurrent was detected.

The water pump is not operating.

Problem with the solenoid contactor for the pump

The flow switch wiring is not connected.

Water flow shortage

Operate the pump.

Replace the solenoid contactor.

Connect the flow switch wiring to the system.

Increase the water flow rate.

Flow switch contact failure

The water temperature has reached above the preset temperature.

Polish the contact point.

Normal

Contact failure at a connector terminal Polish the contact point.

Loose wire connection

Seized compressor or fan bearing

Tighten the wire connection.

Disassemble the compressor or the fan, and repair as necessary.

Check the operation patterns.

High-pressure is too high.

Burned, short-circuited, or ground faulted motor

Replace the compressor, and clean the refrigerant circuit.

HWE14170 - 108 GB


[

IX

Troubleshooting ]

Problem

The unit has stopped during operation and does not restart.

The unit has stopped during operation and does not restart.

Check item

Automatic Start/Stop thermistor has tripped.

Water temperature is high.

The high-pressure switch has tripped.1302, 1303

The vacuum protection has tripped.

1301

The discharge temperature thermistor has tripped.

1102

Overcurrent passed through the compressor.

4250

A water supply cutoff was detected.

2500, 2501, 2550

Water temperature is low.

Water temperature is not high.

Outdoor temperature is not low.

Suction gas is overheated.

Outdoor temperature is high.

The pump is operating normally.

gas leakage

Cause

The setting for the automatic Start/Stop thermistor is too low.

Dirty condenser

Refrigerant overcharge

Air in the refrigerant circuit

Water flow shortage

Refrigerant undercharge, refrigerant gas leakage

Dirty evaporator


Clogged strainer

Clogged check valve

Excessive frosting

Refrigerant undercharge, refrigerant


Clogged strainer

The cooling fan is stopped.

High pressure is too high.

Overload operation

Burnt motor

Seized compressor

Normal

Solution

Change the setting for the automatic Start/

Stop thermistor.

Clean the condenser.

Evacuate the system, and charge the system with refrigerant.

Evacuate the system, and charge the system with refrigerant.

Secure enough water flow rate.

Perform a leakage test, repair the leaks, evacuate the system, and charge the refrigerant circuit with refrigerant.

Clean the evaporator.


Replace the strainer.

Replace the check valve.

Install a snow hood to keep snow from accumulating on the unit.



Replace the strainer.

Check the fan for proper operation, and replace it if necessary.

Check the items above and make necessary adjustments so that the suction gas temperature falls within the specified temperature range.

Reduce the operation load, and check the operation patterns.


The pump does not operate.

Water flow shortage Increase the water flow rate.

Flow switch fault

Problem with the solenoid contactor for the pump

Pump fault

Replace the flow switch.

Replace the electromagnetic contactor.

Replace the pump.

Plate heat exchanger freeze-up

4-way valve fault


Replace the 4-way valve.

The unit is in operation, but the water does not heat up/cool down.

The freeze-up protection function has tripped.

1503

Water temperature is low/high.

Water flow shortage

The water flow rate is sufficient.

The water inlet/outlet temperature differential is normal.

The water-heating/cooling load is too high.

Low refrigerant charge due to a leak.

Install more units

Water temperature is high/low.

The water inlet/outlet temperature differential is small.




Operate the units within the specified pressure range.


Repair the devices.

Replace the LEV.

The unit is making a great deal of vibrations and noise.

The compressor is being flooded.


Compressor failure

High pressure is too high, or low pressure is too low.

Water flow shortage

Problem with the external devices


HWE14170 - 109 GB


[

IX

Troubleshooting ]

If a problem occurs, please check the following before calling for service.

(1) Check the error code against the table below.

(2) Check for possible causes of problems listed in the "Cause" column that correspond to the error code.

(3) If the error codes that appear on the display are not listed in the table below, or no problems were found with the items listed in the "Cause" column, please consult your dealer or servicer.

Diagnosing Problems Using Error Codes

Error code *1

Error type

Cause

(Installation/Setting error)

Cause

(Parts problems)

4106

2500

P o w e r s u p p l y f a u l t

Water supply cutoff

(Flow switch has been triggered.)

* 3 P o w e r s u p p l y f a u l t o c c u r r e d w h e n t h e operation switch is switched on.

The water flow rate dropped below the flow switch threshold.

Water supply cutoff

No water

Water supply cutoff

-

• Open-circuited flow switch

• Broken flow switch wiring

2501

2550

1302

1303

Water supply cutoff (detection by sensor)

H i g h p r e s s u r e f a u l t N o w a t e r

Water supply cutoff

• Inlet water thermistor fault

• Outlet water thermistor fault

• Linear expansion valve fault

• High-pressure sensor fault

1176

1301

1189

Discharge SH fault

L o w p r e s s u r e f a u l t

ACC inlet SH fault

5110

Thermistor

5101

5102

5103 fault

Outdoor temperature (TH10)

Inlet water temperature (TH1)

Inlet water temperature (TH2)

Outlet water temperature (TH3)

7117

Model setting error 2

-

• Low-pressure sensor fault

• ACC inlet refrigerant temperature thermistor fault


• Discharge refrigerant temperature thermistor fault


T h e o u t d o o r t e m p e r a t u r e w a s b e l o w t h e operating range.




• Refrigerant deficiency (refrigerant gas leak)

-

-




• Broken or shorted thermistor wiring

-


-


-


-


5105

5106

5107

5111

5115

ACC inlet refrigerant temperature

(TH5/TH25)

Air heat exchanger refrigerant temperature

(TH6/TH26)

Water heat exchanger refrigerant temperature (TH7/TH27)

Discharge refrigerant temperature

(TH11/TH21)

External water temperature (TH15)

5201

High-pressure sensor fault/high-pressure fault

5202

7113

4115

Low-pressure sensor fault/low-pressure fault

M o d e l s e t t i n g e r r o r 1

P o w e r s u p p l y f r e q u e n c y f a u l t

-

-

-




-


-

• Broken or shorted pressure sensor wiring

-

• Broken or shorted pressure sensor wiring

D i p s w i t c h e s o n t h e P C B w e r e s e t incorrectly during maintenance.

-

-

P o w e r s u p p l y f r e q u e n c y i s other than 50 Hz or 60 Hz.

a f r e q u e n c y

T h e r e i s a n o p e n p h a s e .

•

• CNTYP1 resistor fault (connected to the

Main control board)

C i r c u i t b o a r d f a u l t

-

4102 O p e n p h a s e

1102

1138

1503

Discharge temperature fault

(A discharge refrigerant temperature of 120ºC or above is detected momentarily while the compressor is in operation.)

H

C o o l t d w a t w a e r t e a r b n a b o n r o m a r m l a l r i s d e r o p * 4

No water

Abrupt change in water temperature

(5K/min. or greater)

Pump failure

D r o p i n w a t e r f l o w o r w a t e r s u p p l y c u t o f f

Water temperature rise



• Refrigerant deficiency (refrigerant gas leak)

-

D r o p i n w a t e r f l o w o r w a t e r s u p p l y c u t o f f

Water temperature drop

-

Error reset *2

Unit side

(PCB)

Remote

SWS1

Operation

SW

HWE14170 - 110 GB


[

IX

Troubleshooting ]

Error code *1

Error type

Cause


Cause

(Parts problems)

4250

(102)

4250

(103)

4250

(107)

4250

(106)

4250

(104)

4250

(105)

4220

(108)

4220

(109)

4220

(110)

1510

Gas leak fault

1512

Low evaporation temperature fault

4116

F u n m o t o r f a u l t

4122

F u n i n t e r l o c k f a u l t

4250

(101)

Inverter error

IPM error

ACCT overcurrent

DCCT overcurrent

-

Drop in water flow

Water temperature drop

S t r o n g w i n d f r o m t h e o u t s i d e

D i s c o n n e c t i o n o f w i r i n g

-

-

-

• High pressure sensor fault

• Refrigerant deficiency

(refrigerant gas leak)

-

• F a n m o t o r f a u l t

• FANCONT board fault

• F a n m o t o r f a u l t

• FANCONT board fault

• INV board fault

• Ground fault of the compressor

• Coil problem

• IPM error (loose terminal screws, cracked due to swelling)

• Items listed under "Heatsink overheat protection" below

• INV board fault


• Coil problem


Overcurrent relay trip (effective value)

(During operation)

Overcurrent relay trip (momentary value)

(During operation)

Short-circuited IPM/ground fault

(During operation)

Overcurrent error due to a short-circuited

(During operation)

Voltage related problems during operation

Bus voltage drop protection

Bus voltage rise protection

-

-

-

Inter-phase voltage drop

(Inter-phase voltage at or below 180 V)




• Shorted output wiring

Momentary power failure/power failure

Power supply voltage drop (Inter-phase voltage is 180 V or below.)

Voltage drop

• INV board CNDC2 wiring fault

• INV board fault

• 52C fault

• Diode stack failure

Incorrect power supply voltage • INV board fault

V D C e r r o r P o w e r s u p p l y v o l t a g e r i s e o r d r o p • P C B f a u l t

4220

(111)

4230

4240

5301

(115)

5301

(116)

5301

(117)

Logic error

Heatsink fault

(Heatsink overheat protection)

O v e r l o a d p r o t e c t i o n

ACCT sensor fault

DCCT sensor

ACCT sensor/circuit fault

Malfunction due to external noise interference

• Faulty grounding

• Improper transmission and external wiring installation

(Shielded cable is not used.)

• Low-voltage signal wire and highvoltage wire are in contact.

(Placing the signal wire and power wire in the same conduit)

• INV board fault


Clogged heatsink cooling air passage

• Fan motor fault

• THHS sensor fault


C l o g g e d heatsink cooling air passage



• Current sensor fault

• INV circuit fault

• Compressor fault

-

• INV board fault

• Ground fault of the compressor and IPM error

-

-

• Poor contact at the INV board connector

CNCT


DCCT

• Ground fault of the compressor and IPM error


CNCT2 (ACCT)

• ACCT sensor fault

Error reset *2

Unit side

(PCB)

Remote

SWS1

Operation

SW

HWE14170 - 111 GB


[

IX

Troubleshooting ]

Error code *1

5301

(118)

5301

(119)

5301

(120)

5114

0403

Inverter error

DCCT sensor/circuit fault

Faulty wiring

Error type

Open-circuited IPM/loose ACCT sensor

THHS sensor/circuit fault

Serial communication error

IPM system error

Cause


-

-

-

-

-

INV board switch setting error

6831

6832

6834

6833

Remote controller error

(incl. remote controller wiring fault)


Remote controller signal transmission error Communication error due to external noise interference


Remote controller over current

Remote controller cable is not connected.

Broken wiring

Communication error due to external noise interference

Remote controller cable short circuit

Remote controller malfunction

4126

Analog input error

(Control board (MAIN) CN421)

6500

Communication error between the main and sub units

Communication error between the MAIN and SUB circuits

Analog input type fault

(SW3-1, SW3-2)

-

6600 Transmission line power supply PCB fault

Communication error between the main and sub units

6602

(Simple multiple unit control mode)

6603

Communication error due to external noise interference

6606

6607

Cause

(Parts problems)


CNCT


DCCT

• DCCT sensor fault

• INV board fault

• Disconnected ACCT sensor (CNCT2)

• ACCT sensor fault

• Broken compressor wiring

• INV circuit fault (IPM error etc.)

• ACCT sensor is connected in the wrong phase.

• ACCT sensor is connected in the wrong orientation.

• THHS sensor contact failure


• INV board fault

• Communication error between control board and INV board (noise interference, broken wiring)

• Wiring or connector connection between connectors on IPM-driven power supply circuit

• INV board fault

• Broken remote controller wiring

• Main control board communication circuit fault



• Broken remote controller wiring

Error reset *2

Unit side

(PCB)

Remote

SWS1

Operation

SW

• Broken or open analog signal output device wiring (CN421)

-

• Broken wiring to the transmission power supply circuit board (between the main and sub units)

• Transmission power supply PCB communication circuit fault

*1: If an error occurs, error codes shown above will appear in the 4-digit digital display on the PCB and the remote controller.

*2: Definition of symbols in the "Error reset" column.

: Errors that can be reset if the remote reset setting on the unit is set to "Enable" (factory setting)

Errors that cannot be reset if the remote reset setting on the unit is set to "Disable"

: Errors that cannot be reset

: Errors that will be automatically cancelled once its cause is removed

*3: Power failure will be detected as an error only when the "Automatic recovery after power failure" setting on the unit is set to "Disable."

(The default setting for the "Automatic recovery after power failure" setting is "Enable.")

*4: Before resetting this error, remove its causes. Resuming operation without removing the causes of heat exchanger freeze up will cause heat exchanger damage.

HWE14170 - 112 GB


[

IX

Troubleshooting ]

[3] Troubleshooting Principal Parts

High-Pressure Sensor

-1- High-Pressure Sensor (63HS)

1. Compare the pressure that is detected by the high pressure sensor, and the high-pressure gauge pressure to check for failure.

Error history, temperature and pressure readings of the sensor, and LEV opening

1 2 3 4

SW1

5 6 7 8 9 10

OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF

High pressure and low pressure will appear alternately on the 7-segment LED. See below for how they are displayed.

Decimal delimiter

Indicates that the high pressure is displayed

Indicates that the low pressure is displayed

(1) While the sensor is stopped, compare the gauge pressure and the pressure displayed on self-diagnosis LED1.

1) When the gauge pressure is between 0 and 0.1MPa, internal pressure is caused due to gas leak.

2) When the pressure displayed on self-diagnosis LED1 is between 0 and 0.1MPa, the connector may be defective or be disconnected. Check the connector and go to (4).

3) When the pressure displayed on self-diagnosis LED1 exceeds 4.15MPa, go to (3).

4) If other than 1), 2) or 3), compare the pressures while the sensor is running. Go to (2).

(2) Compare the gauge pressure and the pressure displayed on self-diagnosis LED1 while the sensor is running. (Compare them by MPa unit.)

1) When the difference between both pressures is within 0.1MPa, both the high pressure sensor and the control board are normal.

2) When the difference between both pressures exceeds 0.1MPa, the high pressure sensor has a problem. (performance deterioration)

3) When the pressure displayed on self-diagnosis LED1 does not change, the high pressure sensor has a problem.

(3) Remove the high pressure sensor from the control board to check the pressure on the self-diagnosis LED1.

1) When the pressure displayed on self-diagnosis LED1 is between 0 and 0.1MPa , the high pressure sensor has a problem.

2) When the pressure displayed on self-diagnosis LED1 is approximately 4.15MPa, the control board has a problem.

(4) Remove the high pressure sensor from the control board, and short-circuit between the No.2 and 3 connectors

(63HS:CN63HS) to check the pressure with self-diagnosis LED1.

1) When the pressure displayed on the self-diagnosis LED1 exceeds 4.15MPa, the high pressure sensor has a problem.

2) If other than 1), the control board has a problem.

2. Pressure sensor configuration

The high pressure sensor consists of the circuit shown in the figure below. If DC 5V is applied between the red and the black wires, voltage corresponding to the pressure between the white and the black wires will be output, and the value of this voltage will be converted by the microcomputer. The output voltage is 0.071V per 0.098MPa.

Vcc

Vout

GND

Control board side

Pin 3

Pin 2

Pin 1

63HS

1 2 3

Pressure 0 - 4.15MPa

Vout 0.5 - 3.5 V

0.071 V / 0.098 MPa

1

2

3

GND (Black)

Vout (White)

Vcc (DC5V)(Red)

1.5

1.0

0.5

0

3.0

2.5

2.0

4.5

4.0

3.5

Output voltage ( V)

HWE14170 - 113 GB


[

IX

Troubleshooting ]

Low-Pressure Sensor

-2- Low-Pressure Sensor (63LS)

1. Compare the pressure that is detected by the low pressure sensor, and the low pressure gauge pressure to check for failure.

Error history, temperature and pressure readings of the sensor, and LEV opening

SW1

1 2 3 4 5 6 7 8 9 10

OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF

High pressure and low pressure will appear alternately on the 7-segment LED. See below for how they are displayed.

Decimal delimiter

Indicates that the high pressure is displayed

Indicates that the low pressure is displayed

(1) While the sensor is stopped, compare the gauge pressure and the pressure displayed on self-diagnosis LED1.

1) When the gauge pressure is between 0 and 0.1MPa, internal pressure is caused due to gas leak.

2) When the pressure displayed on self-diagnosis LED1 is between 0 and 0.1MPa , the connector may be defective or be disconnected. Check the connector and go to (4).

3) When the pressure displayed on self-diagnosis LED1 exceeds 1.7MPa, go to (3).

4) If other than 1), 2) or 3), compare the pressures while the sensor is running. Go to (2).

(2) Compare the gauge pressure and the pressure displayed on self-diagnosis LED1 while the sensor is running.(Compare them by MPa unit.)

1) When the difference between both pressures is within 0.03MPa, both the low pressure sensor and the control board are normal.

2) When the difference between both pressures exceeds 0.03MPa, the low pressure sensor has a problem. (performance deterioration)

3) When the pressure displayed on the self-diagnosis LED1 does not change, the low pressure sensor has a problem.

(3) Remove the low pressure sensor from the control board to check the pressure with the self-diagnosis LED1 display.

1) When the pressure displayed on the self-diagnosis LED1 is between 0 and 0.1MPa, the low pressure sensor has a problem.

2) When the pressure displayed on self-diagnosis LED1 is approximately 1.7MPa, the control board has a problem.



When the outdoor temperature is 43°C or less, the control board has a problem.



When the outdoor temperature exceeds 43°C, go to (5).

(4) Remove the low pressure sensor from the control board, and short-circuit between the No.2 and 3 connectors

(63LS:CN63LS) to check the pressure with the self-diagnosis LED1.

1) When the pressure displayed on the self-diagnosis LED1 exceeds 1.7MPa, the low pressure sensor has a problem.


(5) Remove the high pressure sensor (63HS) from the control board, and insert it into the connector for the low pressure sensor (63LS:CN63LS) to check the pressure with the self-diagnosis LED1.

1) When the pressure displayed on the self-diagnosis LED1 exceeds 1.7MPa, the control board has a problem.


2. Low-pressure sensor configuration

The low pressure sensor consists of the circuit shown in the figure below. If DC5V is applied between the red and the black wires, voltage corresponding to the pressure between the white and the black wires will be output, and the value of this voltage will be converted by the microcomputer. The output voltage is 0.173V per 0.098MPa.

Vcc

Vout

GND

Control board side

Pin 3

Pin 2

Pin 1

63LS

1 2 3

Pressure 0 - 1.7 MPa

Vout 0.5 - 3.5 V

0.173 V / 0.098 MPa

1

2

3

GND (Black)

Vout (White)

Vcc (DC5V)(Red)

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0

0 0.5

1 1.5

2 2.5

Output voltage (V)

3 3.5

HWE14170 - 114 GB


[

IX

Troubleshooting ]

Solenoid Valve

-3- Temperature sensor

Use the flowchart below to troubleshoot the temperature sensor.

Troubleshooting the thermistor

(1)Thermistor <Heatsink temperature> :THHS

Start

*1

Disconnect the thermistor to be checked from the circuit board.

*2

Measure the actual temperature of the pipe at the thermistor.

Thermistor R

50

= 17 kΩ±2% exp {4016(

1

273 +t

160

Check the thermistor resistance.

Compare the actual temperature and the temperature that corresponds to the thermistor resistance to see if there is a discrepancy between them.

No

No temperature difference

Yes

Connect the thermistor connector to the circuit board, check the sensor reading and check the temperature difference.

*3

No

No temperature difference

Yes

Normal

Replace the thermistor.

Check for proper connection.

Replace the control board.

120

80

40

1

323

)}

* 1 The table below shows the thermistor numbers and their corresponding connectors.

Check each sensor by disconnecting the corresponding connector.

0

0

TH11. TH21

TH5 . TH25

TH1

TH7 . TH27

CN401

CN408 1-2

CN407 1-2

CN406 1-2

TH6 . TH26

TH10

TH3

TH2

CN404

CN405

CN407 3-4

CN406 5-6

* 2

. Pull out the sensor connector from the I/O board.

Do not pull on the lead wire.

. Measure the resistance with a tester.

. If the measured value is within ± 10% of the value as shown in the table below, the circuit sensor is normal.

* 3 Use the maintenance tool to view the sensor reading.

30 60

Temperature( °C )

90

(3) High-temperature-range thermistor: TH11,21 (2) Low-temperature-range thermistor

: TH1,2,3,5,6,7,10,25,26,27

Thermistor R

0

= 15kΩ±3% exp

{ 3385 (

1

273 +t

50

1

273

)}

40

30

20

10

0

-20 -10 0 10 20 30 40 50

Temperature(

°C

)

120

Thermistor R

120

= 7.465kΩ ±2% exp {4057 (

1

273 +t

110

100

1

393

)}

90

80

70

60

50

40

30

20

10

0

40 50 60 70 80 90 100 110 120

Temperature(

°C

)

HWE14170 - 115 GB


[

IX

Troubleshooting ]

LEV

-4- LEV

1. General descriptions of the operation of the LEV in the main circuit

LEV1 is driven by the pulse signal from the circuit board and is controlled by a stepping motor.

The valve opening changes according to the number of pulses

1) Control board and LEV

Outdoor control board

DC12V

LEV

Red

6

4

Blue

M

5

1

White Red Orange

6

2

3

Yellow

ø4

ø3

ø2

ø1

Blue

Orange

Yellow

White

3

2

1

5

4

ø4

ø3

ø2

ø1

Drive circuit

Connector CNLVE

Note. The connector numbers on the intermediate connector and the connector on the control board differ. Check the color of the lead wire

to judge the number.

2) Pulse signal output and valve operation

Output

(phase) number

1 2

Output state

3 4

ON OFF OFF ON 1

2

3

4

ON ON OFF OFF

OFF ON ON OFF

OFF OFF ON ON

Output pulses change in the following orders when the

Valve is closed; 1 2 3 4 1

Valve is open; 4 3 2 1 4

*1. When the LEV opening angle does not change,

all the output phases will be off.

*2. When the output is open phase or remains ON,

the motor cannot run smoothly, and rattles and vibrates.

3) LEV valve closing and opening operatio

D

Valve closed

C

*Upon power on, a 2260 pulse signal is sent to the LEV to determine the

valve position and bring the valve to the position indicated by " A " in the diagram

When the valve operates smoothly, no sound from LEV or no vibration occurs, however, when the pulses change from E to A in the chart or the valve is locked, a big sound occurs.

*Whether a sound is generated or not can be determined by

holding a screwdriver against it, then placing your ear against the handle.

*If liquid refrigerant is present in the LEV, it may make the operating sound

of the LEV difficult to detect.

Valve open

A

E

Fully open

2000 pulses

Pulses

B

Extra closure range (80 - 120 pulses)

HWE14170 - 116 GB


[

IX

Troubleshooting ]

(1) Judgment methods and possible failure mode

Malfunction mode

Microcomputer driver circuit failure

Judgment method

Disconnect the control board connector and connect the check LED as shown in the figure below.

2

1

6

5

4

3 resistance:0.25W 1k

Ω

LED:15VDC 20mA more resistance

LED

When the drive circuit has a problem, replace the control board.

Remedy

Pulse signal is output for 17 seconds when the main power is turned on.

If there is any LED that remains unlit or remains lit, there is a problem with the drive circuit.

LEV mechanism is locked

If the LEV is locked, the drive motor runs idle, and makes a small clicking sound.

When the valve makes a closing and opening sound, the valve has a problem.

Disconnected or short-circuited

LEV motor coil

Measure resistance between the coils (red - white, red

-orange, red - yellow, red - blue) using a tester. They are normal if resistance is 150ohm 10%.

Replace the LEV.

Replace the LEV coils.

Faulty wire connections in the connector or faulty contact

1.

Check for loose pins on the connector and check the colors of the lead wires visually

Check the continuity at the points where an error occurs.

2.

Disconnect the control board's connector and conduct a continuity check using a tester.

HWE14170 - 117 GB


[

IX

Troubleshooting ]

2. LEV coil removal procedure

The LEV consists of a coil and a valve body that can be separated from each other.

Coils

Stopper

Body

Lead wire

(1) Removing the coils

Fasten the body tightly at the bottom (Part A in the figure) so that the body will not move, then pull out the coils toward the top.If the coils are pulled out without the body gripped, undue force will be applied and the pipe will be bent.

Part A

(2) Installing the coils

Fix the body tightly at the bottom (Part A in the figure) so that the body will not move, then insert the coils from the top, and insert the coil stopper securely in the pipe on the body. Hold the body when pulling out the coils to prevent so that the pipe will not be bent.

If the coils are pushed without the body gripped, undue force will be applied and the pipe will be bent. Hold the body when pulling out the coils to prevent so that the pipe will not be bent.

HWE14170

Part A

- 118 GB


[

IX

Troubleshooting ]

Inverter

-5- Inverter



Replace only the compressor if only the compressor is found to be defective.



Replace only the fan motor if only the fan motor is found to be defective.



Replace the defective components if the inverter is found to be defective.



If both the compressor and the inverter are found to be defective, replace the defective component(s) of both devices.

(1) Inverter-related problems: Troubleshooting and remedies

1) The INV board has a large-capacity electrolytic capacitor, in which residual voltage remains even after the main power is turned off, posing a risk of electric shock. Before inspecting the inside of the control box, turn off the power, keep the unit off for at least 10 minutes, and confirm that the voltage between FT-P and FT-N on INV Board has dropped to DC20V or less.

(It takes about 10 minutes to discharge electricity after the power supply is turn off.)

2) The IPM on the inverter becomes damaged if there are loose screws are connectors. If a problem occurs after replacing some of the parts, mixed up wiring is often the cause of the problem. Check for proper connection of the wiring, screws, connectors, and Faston terminals.

3) To avoid damage to the circuit board, do not connect or disconnect the inverter-related connectors with the main power turned on.

4) Faston terminals have a locking function. Make sure the terminals are securely locked in place after insertion.

Press the tab on the terminals to remove them.

5) When the IPM or IGBT is replaced, apply a thin layer of heat radiation grease that is supplied evenly to these parts. Wipe off any grease that may get on the wiring terminal to avoid terminal contact failure.

6) Faulty wiring to the compressor damages the compressor. Connect the wiring in the correct phase sequence.

HWE14170 - 119 GB


[

IX

Troubleshooting ]

[2]

[3]

[4]

Error display/failure condition

[1] Inverter related errors

4250, 4220, 4230, 4240, 5301, 5114, 0403

Main power breaker trip

Main power earth leakage breaker trip

Only the compressor does not operate.

Measure/inspection item

Check the details of the inverter error in the error log at maintenance tool.

Take appropriate measures to the error code and the error details in accordance with [2] 2.Error code list.

Refer to "(3) Trouble treatment when the main power breaker is tripped".(page 123)

Refer to "(4) Trouble treatment when the main power earth leakage breaker is tripped".(page 123)

Check the inverter frequency on the LED monitor and proceed to (2) -

[4] if the compressor is in operation.(page 122)

See (2)-[4].(page 122) [5] The compressor vibrates violently at all times or makes an abnormal sound.

[6] Noise is picked up by the peripheral device

[7] Sudden malfunction (as a result of external noise.)

<1> Check that power supply wiring of the peripheral device does not run close to the power supply wiring of the unit.

<2> Check if the inverter output wiring is not running parallel to the power supply wiring and the transmission lines.

<3> Check that the shielded wire is used as the transmission line when it is required, and check that the grounding work is performed properly on the shielded wire.

<4> Meg failure for electrical system other than the inverter

<5> Attach a ferrite core to the inverter output wiring. (Contact the factory for details of the service part settings.)

<6> Provide separate power supply to the air conditioner and other electric appliances.

<7> If the error occurred suddenly, a ground fault of the inverter output can be considered. See (2)-[4].(page 122)

*Contact the factory for cases other than those listed above.

<1> Check that the grounding work is performed properly.

<2>Check that the shielded wire is used as the transmission line when it is required, and check that the grounding work is performed properly on the shielded wire.

<3>Check that neither the transmission line nor the external connection wiring does not run close to another power supply system or does not run through the same conduit pipe.

* Contact the factory for cases other than those listed above.

HWE14170 - 120 GB


[

IX

Troubleshooting ]

(2) Inverter output related troubles

[1]

Check the

INV board error detection circuit.

Items to be checked Phenomena

(1) Disconnect the inverter output wire from the terminals of the

INV board (SC-U,

SC-V, SC-W).

1) Overcurrent error

(4250 Detail code No. 101, 102,

103, 106, and 107)

(2) Put the outdoor unit into operation.

2) Logic error

(4220 Detail code No. 111)

3) ACCT sensor circuit failure

(5301 Detail code No.117)

Remedy

Replace the INV board.



[2]

Check for compressor ground fault or coil error.

Disconnect the compressor wiring, and check the compressor Meg, and coil resistance.

4) IPM open

(5301 Detail code No.119)

1) Compressor Meg failure

Error if less than 1 Mohm.

[3]

Check whether the inverter is damaged.

(No load)

2) Compressor coil resistance failure

Coil resistance value of 0.092 ohm

(20°C)

(1) Disconnect the inverter output wire from the terminals of the

INV board (SC-U,

SC-V, SC-W).

1) Inverter-related problems are detected.

Normal

Check that there is no liquid refrigerant in the compressor.

If there is none, replace the compressor.


Connect the short-circuit connector to CN6, and go to section [1].

(2) Disconnect the shortcircuit connector from

CN6 on the INV board.

2) Inverter voltage is not output at the terminals (SC-U, SC-V, and SC-W)


(3) Put the outdoor unit into operation.

Check the inverter output voltage after the inverter output frequency has stabilized.

3) There is an voltage imbalance between the wires.

Greater than 5% imbalance or 5V

4) There is no voltage imbalance between the wires.


Normal

*Reconnect the short-circuit connector to CN6 after checking the voltage.

HWE14170 - 121 GB


[

IX

Troubleshooting ]

Items to be checked

[4]

Check whether the inverter is damaged.

(During compressor operation)

Put the outdoor unit into operation.

Check the inverter output voltage after the inverter output frequency has stabilized.

Phenomena Remedy

1) Overcurrent-related problems occur immediately after compressor startup.

Error code : 4250

Detail code : 101, 106, 107 a.

b.

Check items [1] through [3] for problems.

Check that high and low pressures are balanced.

c.

Check that no liquid refrigerant is present in the compressor.

→

Go to "d." when the problem persists after compressor startup was repeated several times.

If normal operation is restored, check the crankcase heater for problems.

d.

Check that there is a pressure difference between high and low pressures after compressor startup.

→

Check the high pressure with LED monitor for changes.

Replace the compressor if there is no pressure difference. (the compressor may be locked.)

2) There is a voltage imbalance between the wires after the inverter output voltage is stabilized.

Greater than the larger of the following values: imbalance of 5% or

5V

Replace the INV board if there is a voltage imbalance.

Check the crankcase heater for problems if there is no voltage imbalance.

→

When the error occurred, liquid refrigerant may have been present in the compressor.

[5]

Check the fan motor ground fault or the winding.

Remove the wire for the outdoor fan motor, and check the fan motor megger and the winding resistance.

1) Fan motor megger failure

Failure when the megger is 1Mohm or less.

2) Fan motor disconnection

Standard: The winding resistance is approximately several ohm.

(It varies depending on the temperature, or while the inner thermo is operating, it will be ohm)

Replace the fan motor.

[6]

Check the fan board failure.

(1) Check the fan output wiring.

Connector contact failure



Board side



Fan motor side

Cnnector contact failure (2) Check the connector

CNVDC connection.

(3) Check the FAN board failure.

1) The voltage imbalance among each motor wiring during operation

(The voltage imbalance is greater than the larger of the values represented by 5% or 5V.)

Connect the connector.

Connect the connector.

Replace the FAN board.

2) The same error occurs even after the operation is restarted.

HWE14170 - 122 GB


[

IX

Troubleshooting ]

(3) Trouble treatment when the main power breaker is tripped

Items to be checked

[1] Check the breaker capacity.

[2]

[3]

[4]

Perform Meg check between the terminals on the power terminal block TB4.

Turn on the power again and check again.

Turn on the unit and check that it operates normally.

1)

2)

1)

2)

Phenomena

Use of a non-specified breaker

Zero to several ohm, or Meg failure


No remote control display

Operates normally without tripping the main breaker.


Remedy

Replace it with a specified breaker.

Check each part and wiring.

*Refer to (5) "Simple checking procedure for individual components of main inverter circuit".(page 124)



IGBT module



Rush current protection resistor






DC reactor a) The wiring may have been short-circuited. Search for the wire that short-circuited, and repair it.

b) If item a) above is not the cause of the problem, refer to (2)-[1]-[6].

(4) Trouble treatment when the main power earth leakage breaker is tripped

Items to be checked

[1] Check the earth leakage breaker capacity and the sensitivity current.

[2] Check the resistance at the power supply terminal block with a megger.

Phenomena

Use of a non-specified earth leakage breaker

[3]

[4]

Disconnect the compressor wirings and check the resistance of the compressor with a megger.

Disconnect the fan motor wirings and check the resistance of the fan motor with a megger.

Replace with a regulation earth leakage breaker.

Remedy

Failure resistance value Check each part and wiring.

*Refer to (5) "Simple checking procedure for individual components of main inverter circuit".(page 124)



IGBT module









DC reactor

Failure compressor if the insulating resistance value is not in specified range.

Failure when the insulating resistance value is 1 Mohm or less.

Check that there is no liquid refrigerant in the compressor. If there is none, replace the compressor.

Failure fan motor if the insulating resistance value is not in specified range.

Failure when the insulating resistance value is 1 Mohm or less.

Replace the fan motor.

The insulation resistance could go down to close to 1Mohm after installation or when the power is kept off for an extended period of time because of the accumulation of refrigerant in the compressor. If the earth leakage breaker is triggered, please use the following procedure to take care of this.



Disconnect the wires from the compressor's terminal block.



If the resistance is less than 1 Mohm, switch on the power for the unit with the wires still disconnected.



Leave the power on for at least 12 hours.



Check that the resistance has recovered to 1 Mohm or greater.

Earth leakage current measurement method



For easy on-site measurement of the earth leakage current, enable the filter with a measurement instrument that has filter functions as below, clamp all the power supply wires, and measure.

Recommended measurement instrument: CLAMP ON LEAK HiTESTER 3283 made by HIOKI E.E. CORPORATION



When measuring one device alone, measure near the device's power supply terminal block.

HWE14170 - 123 GB


[

IX

Troubleshooting ]

(5) Simple checking procedure for individual components of main inverter circuit

Before inspecting the inside of the control box, turn off the power, keep the unit off for at least 10 minutes, and confirm that the voltage between FT-P and FT-N on INV Board has dropped to DC20V or less.

Part name


52C

Judgment method

IGBT module See "Troubleshooting for IGBT Module ". ( IX [4] -5- (6) )(page 124)


R11, 12, 21, 22

Measure the resistance between terminals R1 and R5: 22 ohm 10%

This electromagnetic relay is rated at DC12V and is driven by a coil.

Check the resistance between terminals

Upper

1

Installation direction

6

2 3 4

Coil

Contact

Check point

Between Terminals 5 and 6



Not to be short-circuited

(Center value 75 ohm)

5

DC reactor DCL Measure the resistance between terminals: 1ohm or lower (almost 0 ohm)

Measure the resistance between terminals and the chassis:

(6) Troubleshooting for IGBT Module

Measure the resistances between each pair of terminals on the IGBT with a tester, and use the results for troubleshooting.

The terminals on the INV board are used for the measurement.

1) Notes on measurement



Check the polarity before measuring. (On the tester, black normally indicates plus.)



Check that the resistance is not open ( ohm) or not shorted (to 0 ohm).



The values are for reference, and the margin of errors is allowed.



The result that is more than double or half of the result that is measured at the same measurement point is not allowed.



Disconnect all the wiring connected the INV board, and make the measurement.

2) Tester restriction



Use the tester whose internal electrical power source is 1.5V or greater



Use the dry-battery-powered tester.

(The accurate diode-specific resistance cannot be measured with the button-battery-powered card tester, as the applied voltage is low.)



Use a low-range tester if possible. A more accurate resistance can be measured.

HWE14170 - 124 GB


[

IX

Troubleshooting ]

Judgment value (reference)

SC-P1

-

-

Red (-)

SC-P1

FT-N

SC-L1

SC-L2

SC-L3

Red (-)

SC-P2

FT-N

SC-U

SC-V

SC-W

INV board external diagram

SC-P2

-

-

FT-N

-

-

5 - 200 ohm

5 - 200 ohm

5 - 200 ohm

Black ( + )

SC-L1

5 - 200 ohm

SC-L2

5 - 200 ohm

-

-

-

Black ( + )

SC-U

5 - 200 ohm

-

-

-

SC-V

5 - 200 ohm

SC-L3

5 - 200 ohm

-

-

-

SC-W

5 - 200 ohm

FT-N

-

-

5 - 200 ohm

5 - 200 ohm

5 - 200 ohm

-

-

-

-

-

-

-

-

-

SC-P2 SC-P1

SC-L1

SC-L2

SC-L3

SC-U

FT-N

SC-V

SC-W

HWE14170 - 125 GB


[

IX

Troubleshooting ]

Control Circuit

-6- Control Circuit

Troubleshooting transmission power circuit of unit

Check the voltage at the internal transmission terminal block (TB3) of unit.

YES

DC 24 ~ 30 V

NO

Check the voltage at TB3 after removing transmission line from TB3.

DC 24 ~ 30 V

NO

Check voltage of terminal block for centralized control (TB7).

YES

YES

DC24 ~ 30V

NO

Check voltage of TB7 by removing transmission line from TB7.

NO

DC24 ~ 30V

NO

Check the voltage between No.1 and No.2 pins of the

CNS2 on the control board.

Check whether the transmission line is disconnected, check for contact failure, and repair the problem.

Check if the internal transmission line is not short-circuited, and repair the problem.

YES

Check the wiring between the control board and power supply board for the transmission line (CN102 and CNIT), and check for proper connection of connectors.

Is there a wiring error or a connector disconnection?

YES

Fix the wiring and connector disconnection.

Check for shorted transmission line or power feed collision for centralized control.

YES

DC24 ~ 30V

NO

Check the voltage between No.1 and No.2 pins of the

CN102 on the power supply board for the transmission line.


DC24 ~ 30V

NO

YES

Check the wiring between the control board and power supply board for the transmission line (CN102 and CNIT), and check for proper connection of connectors.

Check the voltage between No.1 and No.3 pins of the noise filter CN4.

NO

YES

Is there a connector disconnection?

YES

Fix the connector disconnection.

NO

Check the voltage between No.5 and No.2 pins of the CNIT on the control board.

Is the voltage measurement between

4.5 and 5.2 VDC?

YES

Replace the M-NET board


DC279 ~ 374V

NO

Check the voltage between No.1 and No.3 pins of the noise filter CN5.

DC279 ~ 374V

NO

Check the noise filter F4 fuse.

YES


F4 blown

NO

Check the voltages among TB22 and TB24 on the

noise filter.

AC198 ~ 264V

NO

Check the voltage between L2 and N at the power supply terminal block TB1.

YES

YES

Disconnect the noise filters CN4 and CN5, and then replace F4, then turn the power on.

YES

F4 blown

NO

Replace the noise filter.

Connect the noise filter CN4, and then turn the power on.

YES

F4 blown

NO




YES

AC198 ~ 264V

NO


Check and fix any power supply wiring and main power supply problems found.

Turn on the power again.

HWE14170 - 126 GB


[

IX

Troubleshooting ]

Outdoor Unit Fan

-7- Troubleshooting

1. Important notes

If the unit or its refrigerant circuit components experience malfunctions, take the following steps to prevent recurrence.

(1) Diagnose the problem and find the cause.

(2) Before repairing leaks on the brazed sections on the pipes, recover the refrigerant. Braze under nitrogen purge to prevent oxidation.

(3) If any component (including the compressor) malfunctions, only replace the affected parts; it is not necessary to replace the entire unit.

(4) Be sure to recover the refrigerant from the unit before disposing of the unit.

(5) If the cause of the problem cannot be identified, contact the service desk with the following information: unit model, serial number, and the nature of the problem.

HWE14170 - 127 GB


[

IX

Troubleshooting ]

[4] Refrigerant Leak

WARNING


• Doing so may cause the unit or pipes to burst, or result in explosion or fire during use, during repair, or at the time of disposal of the unit.

• It may also be in violation of applicable laws.

• MITSUBISHI ELECTRIC CORPORATION cannot be held responsible for malfunctions or accidents resulting from the use of the wrong type of refrigerant.

1. Leak spot: In the case of unit (Heating season)

1) Collect the refrigerant in the entire system (unit).Do not discharge refrigerant into the atmosphere when it is collected.

2) Repair the leak.

3) Repair the leak, and evacuate the air from the entire system

*1

.

Charge the system with 19 kg of R410A.

*1. Refer to Chapter I [5] Vacuum Drying (Evacuation) for detailed procedure. (page 7)

HWE14170 - 128 GB


[

IX

Troubleshooting ]

[5] Parts Replacement Procedures

WARNING


• Doing so may cause the unit or pipes to burst, or result in explosion or fire during use, during repair, or at the time of disposal of the unit.

• It may also be in violation of applicable laws.

• MITSUBISHI ELECTRIC CORPORATION cannot be held responsible for malfunctions or accidents resulting from the use of the wrong type of refrigerant.

Scroll compressor (SUB)

Thermistor (TH21)



Check joint


Check joint


Thermistor (TH11)

Scroll compressor

(MAIN)

HWE14170

Pressure sensor LP

Pressure sensor HP


Pressure sensor LP

Pressure sensor HP


Thermistor

(TH26)


Rubber mount

Four way valve

<EAHV only>

Oil separator Thermistor

(TH27)

Strainer

Thermistor

(TH7)

(TH2)

Thermistor

Strainer

Strainer

Thermistor

(TH1)

Thermistor

(TH6)

Four way valve

Belt heater

Oil separator

Rubber mount

<EAHV only>

Heat exchanger

Tank assy

<EAHV only>

Check valve

Thermistor

(TH10)

Accumulator

Air purge valve

Thermistor

(TH3)

Thermistor (TH5) Housing joint (40A)


Thermistor (TH25)

- 129 GB


[

IX

Troubleshooting ]

Air purge valve

Housing joint (50A)

Thermistor

(TH3)


Ball valve

Air purge valve



HWE14170 - 130 GB


[

IX

Troubleshooting ]

Main Compressor Replacement Instructions

1

1. Switch off the power of the unit.

2. Collect the refrigerant.

1. Remove the decoration panel SR and panels SR and F on the front of the unit.

5

HWE14170

Decoration panel SR

Panel SR

Panel F

1. Remove the control box.

Control box

1. Remove the belt heater and the wires.

2. Debraze the pipe connections at two locations.

3. Unscrew the four fixing screws, and remove the compressor.

4. Install the new compressor.

5. Connect the pipes by brazing.

6. Re-place the belt heater and the wires.

- 131 -

1. Re-place the control box.

2. Re-place the decoration panel SR and panels SR and F.

3. Charge the unit with refrigerant.

GB


[

IX

Troubleshooting ]

Sub Compressor Replacement Instructions

1

2



1. Remove the decoration panel SL and panels SL and F on the front of the unit.

3

1. Remove the control box.

4

5

HWE14170

Pipe connections

1. Remove the belt heater and the wires.

2. Debraze the pipe connections at two locations.

3. Unscrew the four fixing screws, and remove the compressor.

4. Install the new compressor.

5. Connect the pipes by brazing.

6. Re-place the belt heater and the wires.

Fixing screws

Fixing screws

1. Re-place the control box.

2. Re-place the decoration panel SL and panels SL and F.


- 132 GB


[

IX

Troubleshooting ]

Water-to-Refrigerant Heat Exchanger Replacement Instructions (EAHV)

1



2

1. Remove the decoration panels SL and SR, panels SL, M, and

SR, and the three panels F on the front of the unit.

3

Fan control box

4

1

2

3

4

5

6

1. Remove the fan control box.

7

8

1. Cut the pipes at the eight locations as indicated in the figure at left to allow for the removal of the element.

HWE14170 - 133 GB


[

IX

Troubleshooting ]

5

Fixing screw

(also found on the other side)

1. Unscrew the two element-fixing screws, and remove the element.

6

1. Replace the plate heat exchanger by unscrewing the four fixing screws.

2. Re-place the element.

7

8

Fixing screw

(also found on the left side)

1. Using the replacement pipe kit for water-to-refrigerant heat exchanger, braze-connect all pipes as they were.

1. Re-place the fan control box.

2. Replace the decoration panels SL and SR, panels SL, M, and

SR, and the three panels F.


HWE14170 - 134 GB


[

IX

Troubleshooting ]

Water-to-Refrigerant Heat Exchanger Replacement Instructions (EACV)

1



2

1. Remove the decoration panels SL and SR, panels SL, M, and

SR, and the three panels F on the front of the unit.

3

Fan control box

4

1

2

3

1. Remove the fan control box.

4

1. Cut the pipes at four locations as shown in the figure at left to allow for the removal of the element.

HWE14170 - 135 GB


[

IX

Troubleshooting ]

5

Fixing screw

(also found on the other side)

1. Remove the element by unscrewing the two fixing screws.

6

1. Replace the plate heat exchanger by unscrewing the four fixing screws.

2. Re-place the element.

7

8

Fixing screw

(also found on the left side)

1. Using the replacement pipe kit for water-to-refrigerant heat exchanger, braze-connect all pipes as they were.

1. Re-place fan control box.

2. Re-place the decoration panels SL and SR, panels SL, M, and

SR, and the three panels F.


HWE14170 - 136 GB


[

IX

Troubleshooting ]

Fan Replacement Instructions

1

2


1. Remove the air guide.

Air guide

3

Panel S

Panel M

4

1. Remove panels S and M.

Panel S

Bellmouths

1. Remove the bellmouths.

HWE14170 - 137 GB


[

IX

Troubleshooting ]

6

1. Disconnect the relay connectors from the fan.

(Remove the cable protector with snap buttons.)

Fan motor side

Relay connector

Relay connector

Cable protector with snap buttons

Detailed view of the relay connectors and their surrounding parts

Fixing screw

Ferrite core

Ferrite core mounting plate

1. Unscrew the screws holding the ferrite core mounting plate in place.

(Save the ferrite core mounting plate for later use.)

2. Remove the fan.

(Remove the ferrite core mounting plate as well.)

Detailed view of the fan

7

Ferrite core mounting plate

1. Remove the ferrite core mounting plate from the fan to be replaced, and attach it to the wire on the new fan.

(Untie the cable strap from the ferrite core mounting plate, and attach it to the ferrite core on the new fan.)

2. Re-place the fan.

3. Attach the ferrite core mounting plate to the new fan.

4. Connect the relay connectors on the fan.

(Replace the cable protector with snap buttons as it was.)

Cable strap

8

HWE14170

1. Re-place the bellmouths.

2. Install the pillar.

3. Install the air guide.

- 138 GB


X

Attachments

[1] R410A saturation temperature table .............................................................................. 141

HWE14170 - 139 GB


HWE14170 - 140 GB


[

X

Attachments ]

X

Attachments

[1] R410A saturation temperature table

Saturation pressure

MPa(gauge)

Saturating temperature °C

Saturated liquid Saturated gas

0.46

0.47

0.48

0.49

0.50

0.51

0.52

0.39

0.40

0.41

0.42

0.43

0.44

0.45

0.32

0.33

0.34

0.35

0.36

0.37

0.38

0.25

0.26

0.27

0.28

0.29

0.30

0.31

0.18

0.19

0.20

0.21

0.22

0.23

0.24

0.12

0.13

0.14

0.15

0.16

0.17

0.05

0.06

0.07

0.08

0.09

0.10

0.11

0.00

0.01

0.02

0.03

0.04

0.73

0.74

0.75

0.76

0.77

0.78

0.79

0.66

0.67

0.68

0.69

0.70

0.71

0.72

0.59

0.60

0.61

0.62

0.63

0.64

0.65

0.53

0.54

0.55

0.56

0.57

0.58

-9.20

-8.71

-8.22

-7.74

-7.27

-6.80

-6.34

-12.84

-12.30

-11.76

-11.24

-10.72

-10.21

-9.70

-16.87

-16.27

-15.67

-15.09

-14.51

-13.95

-13.39

-21.42

-20.73

-20.06

-19.40

-18.75

-18.11

-17.49

-26.66

-25.86

-25.08

-24.31

-23.57

-22.84

-22.12

-33.93

-32.92

-31.95

-31.00

-30.09

-29.19

-28.33

-27.49

-51.86

-49.96

-48.20

-46.55

-44.99

-43.52

-42.13

-40.81

-39.54

-38.33

-37.16

-36.04

-34.97

0.04

0.43

0.82

1.20

1.58

1.96

2.33

2.70

3.07

3.44

-2.81

-2.40

-1.98

-1.57

-1.16

-0.76

-0.36

-5.88

-5.43

-4.98

-4.54

-4.10

-3.67

-3.24

-9.62

-9.12

-8.62

-8.14

-7.66

-7.18

-6.71

-13.31

-12.76

-12.22

-11.68

-11.16

-10.64

-10.12

-17.41

-16.80

-16.19

-15.60

-15.01

-14.44

-13.87

-22.05

-21.35

-20.66

-19.99

-19.32

-18.68

-18.04

-32.86

-31.88

-30.94

-30.02

-29.13

-28.26

-27.42

-26.20

-25.79

-25.01

-24.25

-23.50

-22.77

-40.75

-39.48

-38.27

-37.11

-35.99

-34.91

-33.86

-51.81

-49.91

-48.15

-46.50

-44.94

-43.47

-42.08

-0.27

0.13

0.52

0.91

1.30

1.68

2.05

2.43

2.80

3.17

3.53

-3.15

-2.72

-2.30

-1.89

-1.48

-1.07

-0.67

-6.25

-5.79

-5.34

-4.89

-4.45

-4.01

-3.58

Saturation pressure

MPa(gauge)



2.07

2.08

2.09

2.10

2.11

2.12

2.13

2.00

2.01

2.02

2.03

2.04

2.05

2.06

1.93

1.94

1.95

1.96

1.97

1.98

1.99

1.87

1.88

1.89

1.90

1.91

1.92

1.80

1.81

1.82

1.83

1.84

1.85

1.86

1.73

1.74

1.75

1.76

1.77

1.78

1.79

1.66

1.67

1.68

1.69

1.70

1.71

1.72

1.60

1.61

1.62

1.63

1.64

1.65

2.34

2.35

2.36

2.37

2.38

2.39

2.27

2.28

2.29

2.30

2.31

2.32

2.33

2.21

2.22

2.23

2.24

2.25

2.26

2.14

2.15

2.16

2.17

2.18

2.19

2.20

34.30

34.49

34.68

34.87

35.05

35.24

35.43

35.61

35.80

35.98

36.16

36.35

36.53

32.95

33.15

33.34

33.54

33.73

33.92

34.11

31.57

31.77

31.97

32.17

32.37

32.56

32.76

30.15

30.36

30.56

30.77

30.97

31.17

31.37

28.69

28.91

29.12

29.33

29.53

29.74

29.95

26.09

26.31

26.53

26.75

26.97

27.19

27.41

27.63

27.84

28.06

28.27

28.18

39.19

39.36

39.54

39.71

39.88

40.05

40.22

40.39

40.56

40.73

40.89

41.06

41.23

37.97

38.14

38.32

38.49

38.67

38.84

39.02

36.71

36.89

37.07

37.25

37.43

37.61

37.79

35.73

35.91

36.10

36.28

36.46

36.65

36.83

34.42

34.61

34.79

34.98

35.17

35.36

35.54

33.07

33.27

33.46

33.65

33.84

34.04

34.23

31.69

31.89

32.09

32.29

32.48

32.68

32.88

30.27

30.47

30.68

30.88

31.09

31.29

31.49

28.81

29.02

29.23

29.44

29.65

29.86

30.06

26.20

26.43

26.65

26.87

27.09

27.31

27.52

27.74

27.96

28.17

28.38

28.60

39.31

39.48

39.65

39.82

39.99

40.16

40.33

40.50

40.67

40.84

41.01

41.18

41.34

37.01

37.19

37.37

37.55

37.73

37.90

38.08

38.26

38.43

38.61

38.78

39.96

39.13

Saturation pressure

MPa(gauge)



1.26

1.27

1.28

1.29

1.30

1.31

1.32

1.20

1.21

1.22

1.23

1.24

1.25

1.13

1.14

1.15

1.16

1.17

1.18

1.19

1.06

1.07

1.08

1.09

1.10

1.11

1.12

0.99

1.00

1.01

1.02

1.03

1.04

1.05

0.92

0.93

0.94

0.95

0.96

0.97

0.98

0.86

0.87

0.88

0.89

0.90

0.91

0.80

0.81

0.82

0.83

0.84

0.85

1.54

1.55

1.56

1.57

1.58

1.59

1.47

1.48

1.49

1.50

1.51

1.52

1.53

1.40

1.41

1.42

1.43

1.44

1.45

1.46

1.33

1.34

1.35

1.36

1.37

1.38

1.39

15.71

15.99

16.26

16.53

16.80

17.07

17.34

17.60

17.87

18.13

18.39

18.65

18.91

11.98

12.28

12.57

12.87

13.16

13.45

13.74

14.03

14.31

14.59

14.88

15.16

15.43

9.84

10.15

10.46

10.77

11.07

11.38

11.68

7.58

7.91

8.24

8.56

8.88

9.20

9.52

5.56

5.90

6.25

6.58

6.92

7.25

3.80

4.16

4.51

4.86

5.21

22.63

22.87

23.11

23.34

23.58

23.81

24.04

24.28

24.51

24.74

24.96

25.19

25.42

25.64

25.87

20.93

21.18

21.42

21.67

21.91

22.15

22.39

19.17

19.42

19.68

19.93

20.18

20.43

20.68

15.82

16.09

16.37

16.64

16.91

17.18

17.45

17.71

17.98

18.24

18.50

18.76

19.02

13.85

14.13

14.42

14.70

14.98

15.26

15.54

11.78

12.08

12.38

12.68

12.97

13.27

13.56

9.94

10.25

10.56

10.87

11.18

11.48

7.69

8.02

8.34

8.67

8.99

9.31

9.62

3.89

4.25

4.61

4.96

5.31

5.66

6.00

6.35

6.68

7.02

7.35

22.74

22.98

23.22

23.46

23.69

23.93

24.16

24.39

24.62

24.85

25.08

25.31

25.53

25.76

25.98

21.04

21.29

21.54

21.78

22.02

22.26

22.51

19.28

19.53

19.79

20.04

20.29

20.55

20.79

Saturation pressure

MPa(gauge)



2.88

2.89

2.90

2.91

2.92

2.93

2.94

2.81

2.82

2.83

2.84

2.85

2.86

2.87

2.74

2.75

2.76

2.77

2.78

2.79

2.80

2.67

2.68

2.69

2.70

2.71

2.72

2.73

2.60

2.61

2.62

2.63

2.64

2.65

2.66

2.54

2.55

2.56

2.57

2.58

2.59

2.47

2.48

2.49

2.50

2.51

2.52

2.53

2.40

2.41

2.42

2.43

2.44

2.45

2.46

3.15

3.16

3.17

3.18

3.19

3.08

3.09

3.10

3.11

3.12

3.13

3.14

3.01

3.02

3.03

3.04

3.05

3.06

3.07

2.95

2.96

2.97

2.98

2.99

3.00

47.63

47.78

47.92

48.07

48.22

48.36

48.51

48.66

48.80

48.95

49.09

49.24

49.38

46.58

46.73

46.88

47.03

47.18

47.33

47.48

45.51

45.66

45.82

45.97

46.12

46.27

46.43

44.42

44.58

44.73

44.89

45.04

45.20

45.35

43.31

43.47

43.63

43.79

43.94

44.10

44.26

41.51

41.68

41.84

42.01

42.17

42.33

42.50

42.66

42.82

42.98

43.15

52.45

52.59

52.72

52.86

52.99

53.13

53.26

51.49

51.63

51.77

51.91

52.04

52.18

52.32

50.52

50.66

50.80

50.94

51.08

51.22

51.36

49.52

49.67

49.81

49.95

50.09

50.23

50.38

47.96

48.11

48.26

48.40

48.55

48.69

48.84

48.98

49.13

49.27

49.42

49.56

49.70

46.92

47.07

47.22

47.37

47.52

47.67

47.81

45.86

46.01

46.16

46.32

46.47

46.62

46.77

44.78

44.93

45.09

45.24

45.40

45.55

45.71

43.67

43.83

43.99

44.15

44.31

44.46

44.62

42.55

42.71

42.87

43.03

43.19

43.35

43.51

41.40

41.56

41.73

41.89

42.06

42.22

42.38

51.80

51.94

52.08

52.21

52.35

52.49

52.62

52.76

52.89

53.03

53.16

50.83

50.97

51.11

51.25

51.39

51.53

51.67

49.84

49.99

50.13

50.27

50.41

50.55

50.69

Saturation pressure Saturating temperature °C


3.89

3.90

3.91

3.92

3.93

3.94

3.95

3.82

3.83

3.84

3.85

3.86

3.87

3.88

3.75

3.76

3.77

3.78

3.79

3.80

3.81

3.68

3.69

3.70

3.71

3.72

3.73

3.74

3.96

3.97

3.98

3.99

3.62

3.63

3.64

3.65

3.66

3.67

3.55

3.56

3.57

3.58

3.59

3.60

3.61

3.48

3.49

3.50

3.51

3.52

3.53

3.54

3.41

3.42

3.43

3.44

3.45

3.46

3.47

3.34

3.35

3.36

3.37

3.38

3.39

3.40

3.28

3.29

3.30

3.31

3.32

3.33

MPa(gauge)

3.20

3.21

3.22

3.23

3.24

3.25

3.26

3.27

59.13

59.25

59.37

59.49

59.61

59.73

59.85

58.28

58.41

58.53

58.65

58.77

58.89

59.01

56.67

56.80

56.92

57.05

57.17

57.30

57.42

57.55

57.67

57.79

57.92

58.04

58.16

55.78

55.91

56.04

56.16

56.29

56.42

56.54

54.88

55.01

55.14

55.27

55.40

55.53

55.65

53.30

53.43

53.56

53.70

53.83

53.96

54.09

54.22

54.36

54.49

54.62

54.75

62.29

62.41

62.52

62.63

62.75

62.86

62.97

61.49

61.61

61.72

61.84

61.95

62.06

62.18

59.97

60.09

60.21

60.33

60.44

60.56

60.68

60.79

60.91

61.03

61.14

61.26

61.38

59.10

59.22

59.34

59.46

59.58

59.70

59.82

58.25

58.37

58.50

58.62

58.74

58.86

58.98

56.64

56.76

56.89

57.02

57.14

57.26

57.39

57.51

57.64

57.76

57.88

58.01

58.13

55.75

55.88

56.01

56.13

56.26

56.39

56.51

54.85

54.98

55.11

55.24

55.36

55.49

55.62

53.40

53.53

53.66

53.80

53.93

54.06

54.19

54.32

54.45

54.59

54.72

62.26

62.37

62.48

62.60

62.71

62.82

62.93

63.04

61.46

64.57

61.69

61.80

61.91

62.03

62.14

59.94

60.06

60.17

60.29

60.41

60.53

60.64

60.76

60.88

60.99

61.11

61.23

61.34

HWE14170 - 141 GB


[

X

Attachments ]

Saturation pressure

MPa(gauge)


Saturated liquid

Saturated gas

4.06

4.07

4.08

4.09

4.10

4.11

4.12

4.13

4.14

4.15

4.00

4.01

4.02

4.03

4.04

4.05

63.08

63.19

63.31

63.42

63.53

63.64

63.75

63.86

63.97

64.08

64.19

64.30

64.41

64.52

64.63

64.74

63.19

63.27

63.38

63.49

63.60

63.71

63.82

63.93

64.04

64.15

64.26

64.37

64.48

64.59

64.69

64.80

HWE14170 - 142 GB

Mitsubishi Electric e-series EAHV-P900YA, EACV-P900YA air-cooled chilling unit Service Handbook

Assistant Bot

Safety Precautions

General

Transportation

Installation

Pipe installation

Electrical wiring

Transportation and repairs

IMPORTANT

CONTENTS

Read Before Servicing

Restrictions

Unit Components

Remote Controller

Electrical Wiring Diagram

Refrigerant Circuit

Control

Test Run Mode

Troubleshooting

Attachments

CONTENTS

Read Before Servicing

[1] Read Before Servicing

CAUTION

[2] Necessary Tools and Materials

[3] Brazing

[4] Air Tightness Test

[5] Vacuum Drying (Evacuation)

[6] Refrigerant Charging

[7] Remedies to be taken in case of a Refrigerant Leak

[8] Characteristics of the Conventional and the New Refrigerants

[9] Notes on Refrigerating Machine Oil

Restrictions

[1] System Configuration

[1] Schematic Diagrams of Individual and Multiple Module Connection Systems

[2] Types and Maximum allowable Length of Cables

[3] Electrical Wiring Installation

1 Main Power Supply Wiring and Switch Capacity

Warning:

Caution:

2 Cable Connections

<1> Schematic Diagram of a Unit and Terminal Block Arrangement

<2> Precautions when fastening screws

<3> Installing the conduit tube

[4] Sample Installation

[1] Schematic Diagrams of Individual and Multiple Module Connection Systems

[5] Switch Types and the Factory Settings

(1) Switch names and functions

[6] Configuring the Settings

<1> Making the settings

<2> System configuration

[7] Water Pipe Installation

(1) Installing the strainer

(2) Installing a flow switch

Unit Components

[1] Unit Components and Refrigerant Circuit

[2] Control Box of the Unit

[3] Unit Circuit Board

Remote Controller

[1] Using the Remote Controller

<1> Starting and Stopping Operation and

Changing the Operation Mode

<2> Setting the Water Temperature

<3> Setting the Day of the Week and Time

<4> Using the Timer

[2] Function Settings

Electrical Wiring Diagram

[1] Electrical Wiring Diagram

Refrigerant Circuit

[1] Refrigerant Circuit Diagram

[2] Principal Parts and Functions

Control

[1] Functions and Factory Settings of the Dipswitches

(2) Scheduled operation

(3) Peak-demand control operation

(4) Remote water temperature or capacity control ratio setting input signal type

(5) Setting the water temperature using analog signal input

(6) Setting the capacity control ratio using analog signal input

(7) Setting the supplementary heater signal output conditions