Mitsubishi Electric e-series EAHV-P900YA(-H)(-N)(-BS), EACV-P900YA(-N)(-BS) Chilling Unit Installation/Operation Manual

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<ORIGINAL>

e-series

Air-cooled Chilling Unit

Installation/Operation Manual

EAHV/EACV

EAHV-P900YA(-H)(-N)(-BS)

EACV-P900YA(-N)(-BS)

CONTENTS

Safety Precautions.......................................................................... 2

1. Selecting the Installation Site...................................................... 7

[1] Installation Conditions............................................................ 7

[2] Installation Space Requirement............................................. 7

2. Unit Installation ......................................................................... 12

[1] Product suspension method ................................................ 12

[2] Center of gravity position ..................................................... 12

[3] Installation on foundation..................................................... 13

[4] Add the refrigerant ............................................................... 14

3. Water Pipe Installation.............................................................. 17

[1] Schematic Piping Diagram and Piping System

Components........................................................................ 17

[2] Water piping attachment method......................................... 18

[3] Notes on Pipe Corrosion...................................................... 20

[4] Installing the Strainer and Flow Switch................................ 22

[5] Ensuring enough water in the water circuit.......................... 23

[6] Water Piping Size and Location........................................... 24

4. System Configurations.............................................................. 25

[1] Schematic Diagrams of Individual and

Multiple Module Connection Systems ................................. 25

[2] Switch Types and the Factory Settings ............................... 26

[3] Configuring the Settings ...................................................... 28

5. Electrical Wiring Installation...................................................... 46

[1] Main Power Supply Wiring and Switch Capacity ................. 46

[2] Cable Connections .............................................................. 47

6. Troubleshooting ........................................................................ 55

[1] Diagnosing Problems for which No Error Codes

Are Available ....................................................................... 55

[2] Diagnosing Problems Using Error Codes ............................ 56

[3] Calling for Service................................................................ 59

7. Operating the Unit..................................................................... 60

[1] Initial Operation.................................................................... 60

[2] Daily Operation .................................................................... 60

[3] Using the Unit in Sub-freezing ............................................. 61

[4] Using the Remote Controller ............................................... 62

[5] Function Settings ................................................................. 67

8. Main Specifications................................................................... 69

[1] Model name ......................................................................... 69

[2] Specifications....................................................................... 70

[3] Technical documentation of fan........................................... 73

Thoroughly read this manual prior to use.

Save this manual for future reference.

Some of the items in this manual may not apply to made-to-order units.

Make sure that this manual is passed on to the end users.


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.

2


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 unit’s 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.

3


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.

4


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.

5


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.

6


1. Selecting the Installation Site

[1] Installation Conditions

Select the installation site in consultation with the client.

Select a site to install the unit that meets the following conditions:

• The unit will not be subject to heat from other heat sources.

• The noise from the unit will not be a problem.

• The unit will not be exposed to strong winds.

• Water from the unit can be drained properly.

• The space requirements (specified on pages 7 through 11) are met.

• There is a possibility of injuring with the fin of the heat exchanger, so abide by following contents.

1 Limit the access of the general public to the location where they can touch the product.

2 Take a measure so the general public cannot easily access the location where they can touch the product.

3 When installing in a location where the general public can touch the product, install the optional fin guard.

Option Parts: EA-130FG

Fin guard

.......

Module

5 fin guards 8 fin guards 11 fin guards

<1> Protection against winds

• Pay attention to the wind direction and installation location to ensure that the air heat exchanger is not directly exposed to strong winds.

• If unable to avoid strong winds, install wind breaking hoods or walls, etc.

<2> Cold Climate Installation

Observe the following when installing the units in areas where snow or strong winds prevail.

• Avoid direct exposure to rain, winds, and snow.

• If the unit is installed in the direct line of rain, winds, or snow, install snow hoods. Use a snow net or snow fence as necessary to protect the unit.

• Install the unit on a base approximately twice as high as the expected snowfall.

• If the unit of heating mode is continuously operated for a long time with the outdoor temperature below the freezing point, install a heater at the drain pan of the unit to prevent freezing of drain.

[2] Installation Space Requirement

<1> If there are no walls, etc. in surrounding area

(1) Single unit installation space

[Left side]

Inside header piping type

(piping space)

If piping connected at rear side (service space)

1.1m

0.3m

[Opposite service side]

0.5m


(service space)

1.0m

If piping connected at rear side (piping space)

[Service side]

0.9m

(service space)

[Right side]

0.3m

*The inside header piping type shows case of piping from the left side of the unit.

7


(2) Connected modules installation space

[Left side]


(piping space)


1.1m

0.3m


0.5m


(service space)

1.0m


[Service side]

0.9m

(service space)

[Right side]

0.3m

(service space)


(3) Discharge side installation space (If 2 rows)


(piping space)


1.1m

0.3m

0.5m


(service space)

1.0m



(service space)


1.0m

0.9m

(service space)

0.3m

(service space)

*The inside header piping type shows case of piping from the left side of the diagram.

*Even if installed as shown in this diagram, a short cycle may occur due to the influence of wind.

(4) Discharge side installation space (if 4 rows

 2)

0.3m

(service space)

0.5m

1.0m


(service space)


0.9m

(service space)

3.0m

(service space)

2.0m

(service space)


(service space)


0.5m

1.0m

0.9m

0.3m

(service space)

(service space)



8


<2> If there are walls, etc. in surrounding area

(1) If installing a single unit in front of a wall

[Left side]

0.5m

(service space)

[Service side]

0.9m

(service space)


0.75m or more

1.0m or more


(service space)


[Right side]

1.1m

(piping space)

*The inside header piping type shows case of piping from the right side of the unit.


(2) If installing 3 connected modules in front of a wall

[Left side]

0.5m

(service space)


0.75m or more

1.0m or more


(service space)


[Service side]

0.9m

(service space)

[Right side]

1.1m

(piping space)



(3) If installing 4 to 6 connected modules in front of a wall

[Left side]

0.5m

(service space)

[Service side]

0.9m

(service space)


0.75m or more

1.0m or more

Inside header piping type (service space)


[Right side]

1.1m

(piping space)

0.5m or more



9


(4) If installing multiple sets of 3 connected modules in front of a wall

[Left side]

0.5m

(service space)

[Service side]

0.9m

(service space)

2.0m or more

(service space)




0.75m or more


1.0m or more


(5) If installing 4 to 6 connected modules in front of a wall (when intake side facing out)

[Right side]

1.1m

(Piping space)

0.9m or more

[Right side]

0.5m

(service space)



0.75m


1.0m

[Service side]

0.9m or more

Wall

[Left side]

1.1m

(Piping space)



<3> If surrounding area enclosed by walls

(1) If installing a single unit on an L-shaped wall

0.5m

[Left side]

(service space)

1.5m or more

[Service side]

0.9m

(service space)


1.5m or more (service space)

[Right side]

1.1m

(Piping space)


*Wall height 2.9 ｍ (unit height: 2.4 + 0.5 m)


10


(2) If entire surrounding area enclosed by walls (but vent holes installed at bottom of wall)

0.5m

1.5m or more

(service space)

1.5m or more

(service space)

Wall opening

0.5m

1.5m or more

(service space)

1.5m or more

(Piping space)



*Vent holes: 0.5 m from floor


(3) If entire surrounding area enclosed by walls, and units face one another (but vent holes installed at bottom of wall)

0.9m

0.5m

1.5m or more

(service space)

1.5m or more

(service space)

Wall opening

0.5m

1.5m

(Piping space)


1.5m or more

(service space)



*Vent holes: 0.5 m from floor


11


2. Unit Installation

Units should be installed only by personnel certified by Mitsubishi Electric.

[1] Product suspension method

• If transporting the product suspended, use the two suspension sections at the front and rear.

• Always feed rope through the four suspension sections so that the unit is not subjected to shocks.

• Use two ropes that are 8 m or longer. (Use four ropes that are 4 m or longer.)

• Use suspension equipment that is capable of supporting the weight of the product.

• Always suspend the product in four sections. (do not suspend the product two sections as this is dangerous)

• Use the appropriate protective pads to ensure that the rope does not rub against the outer panel.

• Refer to the center of gravity position shown in [2], and suspend the unit while taking care to prevent a deviated center of gravity.

8m or longer × 2 ropes

(4m or longer × 4 ropes)

Unit

1m or more

Warning:

• Lift the unit by placing the slings at designated locations. Support the 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.

[2] Center of gravity position

The center of gravity position is shown with the mark.

Standard piping type

900

418

Left side


1138

2250

Service side

900

432

Left side

12

1138

2250

Service side


[3] Installation on foundation

• Securely fix the unit with bolts to keep the unit from falling down during earthquakes.

• Install the unit on a foundation made of concrete or iron.

• Noise and vibrations from the unit may be transmitted through the floor and walls. Provide adequate protection against noise and vibration.

Warning:

• Be sure to install the unit on a surface strong enough to withstand its weight to keep the unit from falling down and causing injury.

• Provide adequate protection against earthquakes. Improper installation may cause the unit to fall down, resulting in personal injury.

When building the foundation, take the floor strength, and piping and wiring routes into consideration.

Flat washer

Unit

Nut

Damper pad

(2 pads stacked)

(field supply)

M12 anchor bolt

(field supply)

125

<ANCHOR BOLT HOLE>

900

(MOUNTING PITCH)

1100

(MOUNTING PITCH)

FOUNDATION

125

125

FRONT

1100

(MOUNTING PITCH)

2250

900

(MOUNTING PITCH)

125

6-ø16HOLE

(M12)

13


[4] Add the refrigerant

• Amount of factory-charged refrigerant is 6 kg x 2.

• Add the refrigerant of 13 kg x 2 in the field. (Rated charged refrigerant is 19 kg x 2)

R410A

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.

CAUTION

If there is excess or shortage in the refrigerant charge, the unit may come to an abnormal stop.

Position of the check joint

1 2 1 2

1 High-pressure side during the cooling operation and power OFF

Low-pressure side during the heating operation

2 High-pressure side during the heating operation

Low-pressure side during the cooling operation and power OFF

Remove these panels.

• Open and close the check joint using two spanners.

• Fasten the check joint in the torque of 7-9 N•m.

• Remove the two tags after adding the refrigerant.

tag

14


Refrigerant charging

CAUTION

• During operation, be sure to wear safety goggles and protective gloves.

• If air is mixed in refrigeration cycle, poor cooling may result, and also if moisture is mixed in refrigeration cycle, clogging

(freezing) or rust may result.

(1) Refrigerant charging type

• Cylinder color is Pink (R410A).

• Refrigerant charging in the liquid state

• Charge refrigerant through the check joint (refer to Page 14).

Cylinder with a siphon Cylinder without a siphon

Cylinder

Valve

Check joint

Cylinder

Valve

Check joint liquid liquid

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

*2 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 first while the rest of refrigerants remain in the cylinder.

*3 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.

Manifold gauge

L H

(1) (2) (3)

L: Low pressure gauge

H: High pressure gauge

(1) Low pressure valve

(2) Refrigerant charging valve

(3) High pressure valve

15


(2) Refrigerant charging procedure

1) Connect the center manifold hose to the valve of the cylinder. Then, close all valves of the manifold gauge.

2) When filling the refrigerant, measure the refrigerant amount using a weight scale. Then, connect all the manifold hoses.

3) Open the valve on the cylinder.

4) Loosen the center manifold hose connection on the manifold gauge set (if applicable, press a purge valve on the manifold gauge) only for a couple of seconds to allow the air in the center manifold hose to be bled by the refrigerant pressure.

5) Open the high pressure side valve and the low pressure side valve on the manifold gauge and fill the coolant.

When charging refrigerant while driving the compressor, do not open the high pressure side valve.

Always make sure to fill from the lower pressure side while driving the compressor.

16


3. 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

Valve

5

Flexible joint

6

Pump

7

Air vent valve

8

Expansion tank

9

Water pipe

0

Drain valve 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.

Required to allow for a replacement or cleaning of the flow adjuster.

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.

Use pipes that allow for easy air purging, and provide adequate insulation.

Install drain valves so that water can be drained for servicing.

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.

17


[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

18


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

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.

19


[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 pH (25˚C) 7.0 ~ 8.0

7.0 ~ 8.0

7.0 ~ 8.0

7.0 ~ 8.0

Standard items

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

Iron

(mg CaCO

3

/ ℓ)

(mg SiO

2

/ ℓ)

(mg Fe/ 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

Ryzner stability index

(mg Cu/ ℓ)

1.0 or less

—

1.0 or less

—

1.0 or less

—

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

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)

(mg Cl/ ℓ)

0.3 or less

0.25 or less

0.1 or less

0.3 or less

0.1 or less

0.1 or less

0.1 or less

0.3 or less

(mg CO

2

/ ℓ)

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

—

(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.

20


(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 made of SUS or similar material to withstand corrosion.

21


[4] Installing the Strainer and Flow Switch

<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.

Rc2

<Unit: mm>

195

Recommended torque: 200±20 (N·m)

143

Option Parts: YS-50A*

Y-shaped strainer

Pipe

(field-supplied)

* 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.

Unit

Inlet

Min. 150

Sample installation

<2> Installing a flow switch

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 - 25.8 m³/h

22


[5] Ensuring enough water in the water circuit

<1> Required amount of water

If the amount of water in the water circuit (circulating water circuit) is insufficient, the unit operation hours may become shorter or the amount of water temperature change to be controlled may become extremely large. Also, the defrost operation during the heating mode may not function properly. Refer to the table below for the minimum amount of water required in the circuit. If the water pipe is too short to keep enough amount of water, install a cushion tank in the water pipe to ensure enough amount of water.

Model

EAHV-P900YA(-H)

EACV-P900YA

Minimum amount of water ( ℓ)

780

420

<2> Calculating the required amount of water in the water circuit

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

(Required amount of water in the water circuit) = (Amount of water that can be held in the water pipe) + (Amount of water that can be held in the heat source unit) + (Amount of water that can be held in the load-side unit)

The amount of water that can be held per meter of the water pipe ( ℓ/m)

1 1/2B (40A)

1.36

2B (50A)

2.20

Pipe size

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

3.62

5.12

4B (100A)

8.71

5B (125A)

13.44

The amount of water that can be held in the heat source unit ( ℓ)

EAHV-P900YA(-H), EACV-P900YA

20

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

55

<3> Inlet/Outlet pipe connection size and material

The table below shows the inlet/outlet pipe connection size.

Inlet/Outlet pipe connection size

Model

EAHV-P900YA(-H)

EACV-P900YA

EAHV-P900YA(-H)-N

EACV-P900YA-N

Inlet pipe connection


(Field-supplied Victaulic joint)



Outlet pipe connection





23


[6] 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

24


4. System Configurations

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" on the next page and

"System configuration procedures: Individual system" (page 30) 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" on the next page and "System configuration procedures: Multiple module connection system" (page 31) for further details.

25


[2] 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:

1Dip switches (SW1 - SW3, SW421)

2Dip switches used in combination with the push switches

3Rotary switches

4Slide switches

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

Different types of switches on the PCB

[Entire view of a PCB]

Rotary switch (SWU3) (0-F)

Rotary switch (SWU2) (0-9)

Switches

Rotary switch (SWU1) (0-9)

[Enlarged view of the switches]

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)

Rotary switch (SWU1) Sets the 10's digit of the unit address (Multiple system).

Rotary switch (SWU2) Sets the 1's digit of the unit address (Multiple system).

Rotary switch (SWU3) Unused

Slide switch (SWS1)

LOCAL

OFF

REMOTE

Initial Setting

MAIN circuit SUB circuit

"0"

"1"

"0"

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) REMOTE

"5"

"1"

"0"

OFF

(Unused)

A

A

(Unused)

Slide switch (SWS2)

Cooling/Heating switching (Only EAHV-P900YA)

(Effective only when SWS1 is set to LOCAL.)

Push switch (SWP1)

Push switch (SWP2)

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.

-

-

-

-

Push switch (SWP3)

Enables the change of value.

Saves the changed value.

Dip switches (SW1-3) Setting change or view the settings -

-

-

-

Dip switch (SW421) Analog input type setting (Refer to Page 39) (Unused)

26

Dip switch (SW1)

Dip switch (SW2)

Dip switch (SW3)

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


(2) 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

4

5

6

Settings change or view the settings

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

7

8

9

10

1

3

4

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.

6 Model setting

OFF

Depends on the unit

OFF

OFF The 7-segment LED display is changed.

-

Leave the setting as it is.

Built-in sensor on the unit

External water temperature sensor

Depends on the setting

At a reset

At a reset

OFF Leave the setting as it is.

SW2

7

8

9

Analog input setting

Analog input signal switching

Auto restart after power failure

10 Model setting

1

2

3

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).

-

-

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.

OFF OFF Leave the setting as it is.

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

2-10V.

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

OFF OFF

1 / 2

4-20mA : OFF OFF

0-10V : ON OFF

1-5V : OFF ON

2-10V : ON ON

Switches the LED display of the control board.

(Display is switched in the 3 second intervals.)

ON ON

High pressure

Low pressure

High pressure

Low pressure

Inlet water temperature

Outlet water temperature

Ambient temperature

SW3

6

7

4

5

Model setting OFF Leave the setting as it is.

8

9 Model setting OFF OFF Leave the setting as it is.

10 Model setting OFF Leave the setting as it is.

"-" 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.

At a reset

At a reset

At a reset

Any time

Any time

Any time

Any time

At a reset

Any time

Any time

* LED display

High pressure

Inlet water temperature Ambient temperature temperature (ºC)

Low pressure

Pressure (MPa) temperature (ºC)


Pressure (MPa) temperature (ºC)

27


[3] 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

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.

1

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.

28


(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.

3

4

1

2

5

6

7

8

9

10 1

11

2

2

1 2

4

4

3 4

3 4

2 3 4

15

16

17

1

12

13 1

14

1

1

1

2

Dip switch setting (SW1) *1

■

:ON

□:OFF

4 5 6

4 7

8

8

9

Setting Item

10 Maximum peak-demand capacity

10 Peak-demand control start time

4

4

6

7 8

9

10 Peak-demand control end time

10 Setting temp 1 (Cooling mode) *2

9 10 Setting temp 2 (Cooling mode) *2

3

3 4

3 4

2 3 4

5

5

5

6

7

7

7

7

8

7 8

7 8

8

8

8

8

8

8

8

9

9

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

10 Setting water temp C at Heating ECO mode *3

10 Setting outdoor temp C at Heating ECO mode *3

10 Enable/disable schedule setting *4

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

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

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

0ºC

35ºC

25ºC

45ºC

15ºC

0

0:00

0:00

0:00

100%

13:00

13:00

7ºC

20ºC

45ºC

55ºC

55ºC

Default

18 1 2 3 4

19 1 2

20 3

5

5

8

7 8

7 8

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

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

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

21 1 2

22

23 1

24

25

26 1

3

3

4

4

3 4

2 3 4

5 6 8

7 8

9

9

9

10 Thermo differential 1 (Cooling mode) *2

10 Thermo differential 2 (Cooling mode) *2

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

2ºC

2ºC

2ºC

2ºC

0ºC

40ºC

27 1 2 3

28

29

2 5

7

7

8

8

10 Supplementary heater operation outdoor temp *3

10 Select a heating curve *3

2 3 4 5 6 7 8 9 10 Current time

-10ºC

1

30 1

31

3

3

4

4

5

5

6

6

7

7

8

8

9

9

10 Month/Date setting

10 Year setting

*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%

Notes

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-point system, 1: curve

29


<2> System configuration

(1) System configuration procedures: Individual system

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

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 27) for further details.

Unit (SUB circuit)

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.

Unit (SUB circuit)

Unit (MAIN circuit)

10’s digit (0) 1’s digit (1) (0)

B

Unit (MAIN circuit)

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 27) will appear on the LED.

A

30


(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 module

Address: 2

M-NET line

Address: 52

SUB

PCB

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

31


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 27) 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.

Dip switch setting (SW1)

■

:ON

□:OFF

Setting Item Main module Sub module

1

2

3

1

8

8

8

10 Setting the multiple modules

10 Setting the main module

10 Setting the total number of modules

1

1

2-6

1

0

2

4 3 8 10 Setting the pump system * 0 or 1 0 or 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

32


Slide switch (SWS1) settings

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

SWS1 Setting

MAIN circuit

LOCAL

SUB circuit

-

OFF

REMOTE -

-

Unit Operation

MAIN circuit

Follows the input signal of the MAIN circuit

Ignores the signal input

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

SUB circuit




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

SWS1 Setting

Main module

MAIN circuit

Sub module

MAIN circuit

LOCAL

LOCAL OFF

REMOTE

OFF

REMOTE

LOCAL

OFF

REMOTE

LOCAL

OFF

REMOTE

Main module

MAIN circuit

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


Follows the input signal fed through a dry contact interface

Main module

SUB circuit


Unit Operation

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




















33


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)

Priority 1

No-voltage contact input

K07-K08

Priority 2 Priority 3

Main board on the unit

Priority 4


K13-K15

Priority 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

Heating -

Cooling (*2)

-

-

-

-

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.

Priority 1

Analog input

Priority 2

Main board on the unit

Schedule setting

No remote controller

Priority 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

30ºC

Heating ECO

Heating

-

Cooling

-

-

When schedule has been set (*3)

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 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

34


<3> Setting procedures

(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

3

4

1

2

1

1

2

2

1 2

1

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

10 Select a heating curve

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

Setting

Lower limit

Upper limit

Setting change from an optional remote controller

(PAR-W21MAA) *1

0.1°C

0.1°C

0.1°C

0.1°C

5

5

30

30

25

25

55

55

Possible *2

Possible *3

Possible *2

Possible *3

0.1°C

0.1°C

0.1°C

0.1°C

30

-30

30

-30

0.1°C

0.1°C

30

-30

55

50

0: 2-point system, 1: curve

55

50

55

50

Not possible

Not possible

Not possible

Not possible

Not possible

Not possible

Not possible

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.

Setting outdoor temp B

Outdoor temp.

Heating ECO (Curve)

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.

35

Outdoor temp.


(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

6

7

8

9

10

3

4

1

2

5

No.


■

:ON

□:OFF

Setting Item

1

3

3 4

3 4

2 3 4

1 2 3 4

5

8

8

8

8

8

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)

1 2

3

5

5

7

7

8

8

10 ON time 3 (Heating ECO mode without remote)

10 OFF time 3 (Heating ECO mode without remote)

2 3 4 5 6 7 8 9 10 Current time

1 3 4 5 6 7 8 9 10 Month/Date setting

3 4 5 6 7 8 9 10 Year setting

Initial value

0000

0000

-

-

-

0

0000

0000

0000

0000

Unit

-

Hour: minute

Hour: minute

Hour: minute

Hour: minute

Hour: minute

Hour: minute

Hour: minute

Month: day

Year

Setting

Increments Lower limit Upper limit

0: Disable, 1: Enable

1 minute 0000 2359

1 minute

1 minute

1 minute

0000

0000

0000

2359

2359

2359

1 minute

1 minute

1 minute

1 day

1 year

0000

0000

0000

0101

2000

2359

2359

2359

1231

2099

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

36


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

Operation Period 1

Operation Period 2

Operation Period 2

Operation Period 3

Target water temp.

Heating

Operation Period 3

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 䚷

37


(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.






1

2

3

Settings table

No.

1

2


■

:ON

□:OFF

Setting Item

4 5 6

4

4

8 9 10 Maximum peak-demand capacity

7 8

7 8

10 Peak-demand control start time

10 Peak-demand control end time

Initial value

100

Unit

%

Increments

1%

1300 Hour: minute 1 minute

1300 Hour: minute 1 minute

Setting

Lower limit

60

0000

0000

Upper limit

100

2359

2359


(PAR-W21MAA)

Not possible

Not possible

Not possible

38


(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.

39


(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.

1

2

3

2

1 2

1


■

:ON

□:OFF

4 5 6

4 5 6

8

8

7 8

Setting Item

10 Preset temp. A (Cooling)

10 Preset temp. B (Cooling)

10 Preset temp. A (Heating)

Initial value

5

25

30

Unit

ºC

ºC

ºC

Setting

Increments Lower limit Upper limit

1ºC

1ºC

1ºC

5

5

30

25

25

55


(PAR-W21MAA)

Not possible

Not possible

Not possible

4 2 7 8 10 Preset temp. B (Heating) 55 ºC 1ºC 30 55 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

7

3

7

7

Monitorable items

Current value (4-20 mA)

SV voltage value (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

40



• 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

41


(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

42





• 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.

43


(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

Setting

Increments

Lower limit

0.1ºC

0.1ºC

0

-30

Upper limit


(PAR-W21MAA)

55 Not possible

50 Not possible

44


(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.






1

Settings table

No.


■

: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

45


5. 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

EACV/EAHV-P900YA

Minimum wire thickness (mm

2

)

Main cable

25

Branch

-

Ground

25

Current leakage breaker

75 A 100 mA 0.1 sec. or less

C

Local swtich (A)

Capacity

75

Fuse

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

Control cable specifications

Remote controller cable

Size

Recommended cable types

M-NET cable between units

*1

Size

Recommended cable types

0.3 - 1.25 mm² (Max. 200 m total)*2

CVV

Min. 1.25 mm² (Max. 120 m total)

Shielded cable CVVS, CPEVS or MVVS

External input wire size

External output wire size

Min. 0.3 mm²

1.25 mm²

*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.

46


[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)

Power supply terminal box

(terminal size: M8)

Ground terminal (M8)

ø52 power supply wiring

Cable strap for the power supply wires

<Power supply box details>

30 30

Power supply box cover

(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.

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.

47


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

48


49


EAHV-P900YA(-H)(-N)(-BS)/EACV-P900YA(-N)(-BS) ELECTRICAL WIRING DIAGRAM

Power supply

3N

50/60Hz

TERMINAL

BOX

TB4

L1

L2

L3

N

FG

FAN CONT

BOX

TB2

L1

L2

L3

N

MAIN BOX

TB1

L1

L2

L3

N

L1

4

3

2

1

3

2

1

CN1A

CN1B

TB21

TB22

TB23

TB24

Noise Filter1-1 red white black

CN2

5

4

3

6

1

2

DCL1

C100

R11,R12

2

3

52C1

1

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

L2-A N1

DB1

U

Z5

R4

3 2 1

CN5 red

C11

D1 R5

R6

3 2 1

CN3 CN4 blue 3 2 1

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

HP1

1 2 3


1 Run

2 Fan mode

*3 Cooling/Heating switching

4 Pump interlock

*5 Anti freeze

6 Capacity change mode

7 Flow switch

8 Outlet water temp. switching

9 Demand

*0 Mode change

To M-NET

CN04(3)

To M-NET

CN04(1)

No-voltage contact output

*a Defrost signal output

*b Heating operation display output c Operation display output d Error display output e Pump operation command output f Drain pan heater signal output

*g Supplementary heater signal output

(FROM SUB BOX)

200VAC

*

3,b are enabled only EAHV-P900YA

5,0,a are disabled only EACV-P900YA a,g are enabled only during the heating.

2

CN401

1

2

1

CNAC red

3

2

1

CNDC pink

F01

AC250V

3.15A T

CN501

3 2 1

2

CN404 black

1

X01

2

CN405 blue

1 6

X03

5

CN502

6 5 4 3 2 1

4

CN406 yellow

X02

3 2 1

MV1

4-way value

(EAHV only)

H1

Case heater

4 3 2 1

CN407 red

2

CN408

1

X05

3 2 1

CN63HS

CN510

7 6 5 4 3 2 1

TERMINAL

BOX

TB6

K64 K63 K62 K61 f e

X04

SUB BOX

L3-A N2

L2

4

3

2

1

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

5

4

3

6

1

2

DCL2

C200

R21,R22

2

3

52C2

1

4

SC-P2 red

FT-P SC-P1 black

2

1

4

3

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

High pressure sensor.2

HP2

1 2 3 1

Low pressure sensor.2

LP2

2 3

High pressure switch.2

63H2

200VAC

2

CN401

1

2

1

CNAC red

3

2

1

CNDC pink

F01

AC250V

3.15A T

2

CN404 black

1

CN501

3 2 1

X01

6 5 4 3

CN406 yellow

6 5

CN502

4 3

X03

2

2

1

1

X02

2 1

CN408

3 2 1

CN63HS

3 2 1

CN63LS

3 2

CN801 yellow

1

X05

CN510

7 6 5 4 3 2 1

MV2

4-way value

(EAHV only)

H2

Case heater

TERMINAL

BOX

TB6

K52 g

K51

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.

Feedig 30mA or more current may damage 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.

50


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

2

3

1

1

2

CJ2-1

CJ1-1

2

3

1

1

2

CJ4-1

CJ3-1

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 3 2 1

CNF1

FANCONT Board1

CN4B

2 1

CN2B

6 5 4 3 2 1

7 6 5 4 3 2 1

CNF2

7 6 5 4 3 2 1

CNF3

CN4A

2 1

CN2A

6 5 4 3 2 1

6

52C1

5

N1

L2-A

6

5

4

3

1

2

CNDP red

1

3

2

5

4

CNXB1

3 2 1

CNACL

Noise

Filter1-2

3 2 1

CNR1 red

CNDB

4

3

6

5

2

1

8

7

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 3 2 1

CNLVA blue

3 2 1

CNTYP2 black

2 1

CN4

7 6 5 4 3 2 1

CN2

2 1

CN332 blue

Control Board1

X07

CN511 blue

7 6 5 4 3 2 1

X06 X09

CN512 yellow

7 6 5 4 3 2 1

X08

CN142D blue

6 5 4 3 2 1

CN402 green

4 3 2 1

(-)

3

CN421 black

(+)

2 1

CN142A black

4 3 2 1

K60 K59 K58 K57 K56 K55 K54 K53 K15 K14 K12 K11 K13 K10 d c b a

TB5

0 9 8 7

T2 T1 AN2 AN1

2 1

2

CN52C red

1

CN142B blue

4 3 2 1 3

CN3A blue

2 1

CN142C

6 5 4 3 2 1

K03 K02 K01 K06 K05 K04 RB RA K09 K08 K07

4 3 6 5 optional remote controller

INV1-FAN2-6

INV1-FAN2-5

INV1-FAN2-4

INV1-FAN2-3

INV1-FAN2-2

INV1-FAN2-1

TH15

External water sensor

(option)

Water temp. setting or

Capacity controll signal

Analog input 4-20mA/

0-10V/1-5V/2-10V

To Noise Filter1-1 CN5(3)

To Noise Filter1-1 CN5(1)

2

CNTYP1 black

1

R

CN102

4 3 2 1

CNS2 yellow

2 1 5

CNIT red

4 3 2 1

4 3 2 1

CN102

3

2

1

CN04 red

M-NET Board

2 1

CNS2 yellow

TB3

A B

5 4 3 2 1

CNIT red

TB7

A B S

TERMINAL

BOX

TB5

B

A

S

M1

M2

INV1-FAN2-8

INV1-FAN2-7

U

V

W

Compressor2

MC2

B-2 B-1

1

2

3

1

2

2

3

1

1

2

CJ2-2

CJ1-2

2

3

1

1

2

CJ4-2

CJ3-2

CJ6-2

CJ5-2

MF1-2

MF2-2

MF3-2

Fan motor1-2

Fan motor2-2

Fan motor3-2

Electronic expansion valve21

LEV21

6

52C2

5

3 2 1

CNDC

7 6 5 4 3 2 1

CNF1

FANCONT Board2

CN4B

2 1

CN2B

6 5 4 3 2 1

7 6 5 4 3 2 1

CNF2

CN4A

2 1

7 6 5 4 3 2 1

CNF3

CN2A

6 5 4 3 2 1

R23

6 5 4 3 2 1

CNLVA blue

3 2 1

CNTYP2 black

Control Board2

2

CNTYP1 black

1

2 1

CN4

6 5 4 3

CN2

2 1

CN332 blue

CN102

4 3 2 1

2

CN52C red

1

N2

L3-A

4

3

2

1

6

5

CNDP red

3

2

1

5

4

CNXB1

3 2 1

CNACL

Noise

Filter2-2

3 2 1

CNR1 red

CNDB

8

7

6

1

3

2

5

4

CNFAN

1

3

2

DB2

B-2

B-1

R

FANCONT BOX

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.

51


FAN control (front view)

SUB CIRCUIT MAIN CIRCUIT

Inside of the control box (front view)

52C2 C200

DCL2

R21

R22

SUB BOX

R23

DB2

FANCONT BOX

R13

DB1

Noise

Filter 2-1

INV

Board 2

Control

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

SUB CIRCUIT MAIN CIRCUIT

Error Codes

20

21

22

23

24

25

26

27

16

17

18

19

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

9

10

11

12

13

14

15

5

6

3

4

No. Error code

1

2

1102

1138

1176

1189

7

8

1301

1302,1303

1503

1510

1512

2500

2501,2550

4102

4106

4115

4116

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

4122

4126

4220

4230

4240

4250

5101

5102

5103

5105

5106

5107

5110

5111

5114

5115

5201

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)

5202

5301

0403

6500

6600

6602

6603

6606

6607

6831

6832

6834

6833

7113,7117

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

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

Error reset *1

*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


Ambient temperature

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

Display is switched in the 3 second intervals.

52


When using a local controller, refer to the table below for the types of input/output signals that are available and the operations that correspond to the signals.

External Input/Output

Input type

Dry contact

(a) UNIT OPERATION Run/Stop

(b) MODE CHANGE

* EAHV-P900YA

EAHV-P900YA-H

Heating

ECO/Heating

(c) CAPACITY CHANGE

MODE

COP priority/

Capacity priority

(d) FAN MODE

ON (Close)

The unit will go into operation when the water temperature drops below the preset temperature.

Heating ECO mode (EAHV-P900YA: When

"COOLING/HEATING SWITCHING" contact (item

(j) below) is ON, this mode is enabled.)

The unit will operate in the energy-efficient mode

(COP priority mode).

OFF (Open)

The unit will stop except when the unit is in the Anti-Freeze mode.

Heating mode (EAHV-P900YA: When

"COOLING/HEATING SWITCHING" contact

(item (j) below) is ON, this mode is enabled.)

The unit will operate at the maximum capacity setting (Capacity priority mode).

Forced/Normal When the outdoor temperature is 5ºC or less, the fan will remain in operation after the compressor has stopped.

The fan will stop when the compressor stops.

Terminal block

TB5 K01-K02

TB6 K13-K15

TB5 K07-K09

TB5 K01-K03

(e) ANTI FREEZE

* EAHV-P900YA

EAHV-P900YA-H

On/Off The unit will operate in the Anti-Freeze mode (with the target temperature 30ºC) when the contact status of (a) "UNIT OPERATION" is "Stop" OR the

ON/OFF button on the remote controller is turned off.

The unit will operate according to the status of the "UNIT OPERATION" contact (item (a) above) or the ON/OFF command from the remote controller.

TB5 K07-K08

(f) FLOW SWITCH Normal/Error The unit is allowed to operate.

(g) PUMP INTERLOCK Normal/Error The unit is allowed to operate.

(h) PEAK-DEMAND

CONTROL

(i) OUTLET WATER

TEMP SWITCHING

On/Off

2nd/1st

The unit will operate at or below the maximum capacity level that was set for the Peak-demand control setting.

Setting temp 2

(Refer to page 35 Settings table)

The unit will not operate.

The unit will not operate.

The unit will operate at or below the maximum capacity setting for either

"Capacity Priority Mode" or "COP Priority

Mode" that was selected for item (c)

"CAPACITY CHANGE MODE" above.

Setting temp 1

(Refer to page 35 Settings table)

TB6 K10-K11

TB5 K04-K06

TB6 K13-K14

TB6 K10-K12

(j) COOLING/HEATING

SWITCHING

* EAHV-P900YA

Heating/

Cooling

Analog

Heating mode Cooling mode TB5 K04-K05

Terminal block

Input type

(k) WATER TEMP SETTING/CAPACITY

CONTROL SIGNAL

Action

Water temperature or capacity control signal can be set by using the external analog input to the

CN421 on the MAIN circuit board. One analog input type can be selected from the following types: 4-20 mA, 1-5 V, 0-10 V, or 2-10 V.

* Use a 4-20 mA signal output devise with insulation.

AN1(+)-AN2(-)

Output type

RC/M-

NET

(l) EXTERNAL WATER SENSOR

(optional)

Contact type

(m)ERROR INDICATOR Close/Open

(n) OPERATION

INDICATOR

(o) PUMP OPERATION

COMMAND

(p) SUPPLEMENTARY

HEATER SIGNAL

Close/Open

Close/Open

Close/Open

(q) DEFROST SIGNAL Close/Open

(r) DRAIN PAN

HEATER SIGNAL

Close/Open

PAR-W21MAA REMOTE

CONTROLLER

M-NET

-

TB5 T1-T2

Conditions in which the contact closes

(turns on)

The unit has made an abnormal stop.

Conditions in which the contact opens

(turns off)

During normal operation

Terminal block

TB6 K59-K60

The "UNIT OPERATION" contact (item (a) above) or the ON/OFF button on the remote controller is

ON.

The "UNIT OPERATION" contact (item (a) above) or the ON/OFF button on the remote controller is OFF.

TB6 K57-K58

The pump will operate according to the status of the "UNIT OPERATION" contact or the ON/OFF button on the remote controller button.

Water and outdoor temperature has dropped below a setting water temperature and a set outdoor temperature.

The unit is in defrost mode.

Outdoor temperature has dropped below a set outdoor temperature.

-

Under all conditions other than the ones listed on the left

Water temperature is at or above a set water temperature +2ºC or the outdoor temperature is at or above a set outdoor temperature +2ºC.

The unit is not in defrost mode.

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

TB6 K61-K62

TB6 K51-K52

TB6 K53-K54

TB6 K63-K64

TB5 RA-RB

TB5 M1-M2

53


External signal interface

Not used

(PAR-W21MAA)

54


6. Troubleshooting

Troubleshooting must be performed only by personnel certified by Mitsubishi Electric.

[1] Diagnosing Problems for which No Error Codes Are Available

If a problem occurs, please check the following. If a protection device has tripped and brought the unit to stop, 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

The unit does not operate.

The unit is in operation, but the water does not heat up.

(Heating)

The unit is in operation, but the water does not heat up.

(Cooling)

Check item

The fuse in the control box is not blown.

The power lamp on the circuit board is not lit.

The power lamp on the circuit board is lit.

Cause

The main power is not turned on.

Switch on the power.

Solution

The pump interlock circuit is not connected.

Connect the pump interlock circuit wiring to the system.

The flow switch wiring is not connected. Connect the flow switch wiring to the system.

The fuse in the control box is blown.

Measure the circuit resistance and the earth resistance.

Automatic Start/Stop thermistor has tripped.

Short-circuited circuit or ground fault

The water inlet/outlet temperature differential is normal.

The water-heating load is too high.

Low refrigerant charge due to a leak.

Resolve the cause, and replace the fuse.

Water temperature is high.

(Cooling)

The setting for the automatic Start/Stop thermistor is too high.

Change the setting for the automatic Start/Stop thermistor.

Water temperature is low.

(Heating)

The setting for the automatic Start/Stop thermistor is too low.

Change the setting for the automatic Start/Stop thermistor.

Install more units.

Perform a leakage test, repair the leaks, evacuate the system, and charge the refrigerant circuit with refrigerant.

Replace the LEV in the main circuit.

Replace the compressor.




LEV fault in the main circuit

The water inlet/outlet temperature differential is small.

Compressor failure

High pressure is too high, or low pressure is too low.

Water flow shortage

-

Problem with the external devices

Water flow shortage

-

Problem with the external devices

The water inlet/outlet temperature differential is normal.

The water-cooling load is too high.

Low refrigerant charge due to a leak.


LEV fault in the main circuit

The water inlet/outlet temperature differential is small.

Compressor failure

High pressure is too high, or low pressure is too low.

Operate the units within the specified pressure range.

Increase the water flow rate.

Repair the devices.

Increase the water flow rate.

Repair the devices.

Install more units.

Perform a leakage test, repair the leaks, evacuate the system, and charge the refrigerant circuit with refrigerant.

Replace the LEV in the main circuit.

Replace the compressor.

Operate the units within the specified pressure range.

55


[2] Diagnosing Problems Using Error Codes

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

Power supply fault

Water supply cutoff

(Flow switch has been triggered.)

*3 Power supply fault occurred when the 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)

High pressure fault No water

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

Low pressure fault

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)

-

• Low-pressure sensor fault

• ACC inlet refrigerant temperature thermistor fault


• Discharge refrigerant temperature thermistor fault


The outdoor temperature was below the 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

-

-

-

-

-

-






• Broken or shorted pressure sensor wiring

5202

Low-pressure sensor fault/low-pressure fault

7113

7117

4115

Model setting error 1

Model setting error 2

Power supply frequency fault

-

• Broken or shorted pressure sensor wiring

Dip switches on the PCB were set incorrectly during maintenance.

-

-

• CNTYP1 resistor fault (connected to the

Main control board)

Power supply frequency is a frequency other than 50 Hz or 60 Hz.

There is an open phase.

• Circuit board fault

-

4102

Open phase

1102

1138

1503

Discharge temperature fault

(A discharge refrigerant temperature of 120ºC or above is detected momentarily while the compressor is in operation.)

Hot water abnormal rise

Cold water abnormal drop

No water

Abrupt change in water temperature

(5K/min. or greater)

Pump failure

Drop in water flow or water supply cutoff

Water temperature rise

*4 Drop in water flow or water supply cutoff

Water temperature drop



• Refrigerant deficiency (refrigerant gas leak)

-

-

Error reset *2

Unit side

(PCB)

Remote

SWS1

Operation

SW

56


Error code *1

Error type

Cause


Cause

(Parts problems)

(

(

(

(

4220

(

108

)

4220

(

109

)

4220

(

110

)

4250

(

102

)

4250

(

103

)

4250

(

107

)

4250

(

106

)

4250

(

104

)

4250

(

105

)

1510

Gas leak fault

1512

Low evaporation temperature fault

4116

Fun motor fault

4122

Fun interlock fault

Inverter error

IPM error

4250

(

101

)

ACCT overcurrent

DCCT overcurrent

-

Drop in water flow

Water temperature drop

Strong wind from the outside

Disconnection of wiring

-

-

-

• High pressure sensor fault

• Refrigerant deficiency

(refrigerant gas leak)

-

• Fan motor fault

• FANCONT board fault

• Fan motor fault

• 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

VDC error Power supply voltage rise or drop • PCB fault

4220

111

)

4230

4240

5301

115

)

5301

116

)

5301

117

)

Logic error

Heatsink fault

(Heatsink overheat protection)

Overload protection

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


Clogged 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

57


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

4126

6500

Remote controller error

(incl. remote controller wiring fault)

Remote controller signal reception error 1 Remote controller cable is not connected.

Broken wiring

Remote controller signal transmission error Communication error due to external noise interference


Remote controller over current

Communication error due to external noise interference

Remote controller cable short circuit

Remote controller malfunction

Analog input error

(Control board (MAIN) CN421)

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

6602

Communication error between the main and sub units

(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.

58


[3] Calling for Service

If the problem cannot be solved by following the instructions provided in the table on the previous pages, please contact your dealer or servicer along with the types of information listed below.

(1) Model name

The model name is a string that starts with "EAHV" or "EACV" and is found on the lower part of the unit.

(2) Serial number

Example: 75W00001

(3) Error code

(4) Nature of the problem in detail

Example: The unit stops approximately one minute after it was started.

59


7. 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 the following pages 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 outdoor 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”.

• If the main power was turned off for six days or longer, make sure that the clock on the unit is correct.

60


[3] Using the Unit in Sub-freezing

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 anti-freeze 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.

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.

• In areas where the air around the unit drops below freezing, leave the main switch turned on even when the unit will not be operated for four days or longer. Leave the switch on the water circulation pump turned on if the pump is connected to a separate circuit.

• If the unit is left turned off for a while (e.g., overnight) when the temperature around the unit drops below freezing, the water in the water circuit will freeze and damage the pipes and the heat exchanger.

• The recommended electric circuit has an anti-freeze circuit. For this circuit to function, the main power must be turned on.

• If the water circulation pump is connected differently from the recommended way, make sure the circuit has some type of anti-freeze function*.

(* A function that automatically operates the water circulation pump to prevent the water in the circuit from freezing when the water temperature drops.)

61


[4] Using the Remote Controller

<1> Starting and Stopping Operation and

Changing the Operation Mode

2

3

Set Tempera-

3 ture buttons

Mode (BACK)

2 button

˚C

˚C

TEMP.

ON/OFF

BACK

MENU

MONITOR/SET

PAR-W21MAA CLOCK

ON/OFF

DAY

INITIAL SETTING

CHECK TEST

CIR.WATER

CLEAR

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 [5] "Function Settings" [5]-2. (2) for how to change the settings for a specific function.

62


<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

30 °C - 55 °C

86 °F - 131 °F *3

Cooling

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

[5], item [5]–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

[5], item [5]–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

TIME SUN

˚C

TEMP.

ON/OFF

MENU ON/OFF

BACK

PAR-W21MAA

MONITOR/SET

CLOCK

DAY

INITIAL SETTING

CHECK

CLEAR

TEST

CIR.WATER

9

4 a

Set a to bring up

in the area labeled

2

.

2. Press the TIMER ON/OFF (SET DAY) button 9 to set the day (labeled

3 in the figure).

* Each press advances the day.

3. Press the Set Time button a 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

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 section [5], item [5]–3. (3).

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 b

SUN

ON

˚C

TEMP.

WEEKLY

ON/OFF

MENU

BACK MONITOR/SET

PAR-W21MAA

ON/OFF

DAY

INITIAL SETTING

CHECK TEST

CIR.WATER

CLOCK CLEAR

1

3

1

78

4

2 a 9 0

63


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 b, 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 No. 1 for Sunday were set to the values shown below.)

Setup Matrix

Op No.

No. 1

Sunday

• 8:30

• ON

• 23 °C (73 °F)

Monday

…

Saturday

<Operation 1 settings for

Sunday>

Start the unit at

8:30, with the temperature set to

23 °C (73 °F).

No. 2

• 10:00

• OFF

• 10:00

• OFF

• 10:00

• OFF

• 10:00

• OFF

…

No. 6

<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 No. 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 a 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 0 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 0 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

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 ).

2. Press the TIMER MENU button b 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

Press the TIMER ON/OFF button 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.

b

Hr

AFTER

ON

TEMP.

SIMPLE

ON/OFF

BACK MONITOR/SET

PAR-W21MAA

MENU

CLOCK

ON/OFF

DAY

INITIAL SETTING

CIR.WATER

CHECK TEST

CLEAR

1

4

2 a 9 0

64


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 section [5], item [5]-3. (3).

2. Press the TIMER MENU button b, 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 The unit will start operation when the specified hours have elapsed.

• OFF timer 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 a 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 0 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:


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

TIMER Hr

AFTER

ON

OFF

SIMPLE

1

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

2. Press the TIMER MENU button b, 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

Press the TIMER ON/OFF button 9 so that the timer setting no longer appears on the screen (at 7 ).

7

˚C

˚C

SIMPLE

To Turn On the Simple Timer

Press the TIMER ON/OFF button 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

˚C

˚C

Hr

AFTER

ON

SIMPLE

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.


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

65


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.

b

TEMP.

AFTER

PAR-W21MAA

MONITOR/SET DAY

OFF

AUTO OFF

ON/OFF

4

2 a 9

How to Set the Auto-Off TIMER

2 3

Timer Setting

AFTER OFF

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 section [5], item [5]-3. (3).

2. Press and hold the TIMER MENU button b 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 a to set the OFF time (

3

).

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

Note:


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 b 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

AFTER

˚C

OFF

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

6

˚C

AFTER

7

˚C

OFF

AUTO OFF

66


[5] 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”)

• 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.

(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”)

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

SELECT”)

• 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).

• 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 E and D buttons for two seconds.)

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

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 [5]-1.

Item 2

Item 3

See [5]-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 [5]-2. (2)

See [5]-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 [5]-3. (1)

Timer function setting (“WEEKLY TIMER”)

See [5]-3. (2)

See [5]-3. (3)

Press the

E button.

Contact number setting (“CALL.”) See [5]-3. (4)

Temp offset setting (“TEMP OFF SET FUNCTION”)

Display options

(“DISP MODE

SETTING”)

Press the

G button.

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

Press the G button.

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

See [5]-3. (5)

Press the

D button.

See [5]-4. (1)

See [5]-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

BACK MONITOR/SET

PAR-W21MAA CLOCK

ON/OFF

DAY

INITIAL SETTING

CHECK TEST

CIR.WATER

CLEAR

C D

H

I

A

B

67


Settings details

[5]-1. Display language setting

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

• Press the [ MENU] button to change the language.

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

5 Italian (I), 6 French (F), 7 Swedish (SW)

[5]-2. Function lock settings

(1) Function lock

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

1 no1: All buttons except the [

ON/OFF] button will be locked.

2 no2: All buttons will be locked.

3 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.


1 Heating mode

2 Heating ECO mode

3 Hot Water mode

4 Anti-freeze mode

5 Cooling mode

6 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.


1 LIMIT TEMP HEATING MODE

2 LIMIT TEMP HOT WATER MODE

3 LIMIT TEMP ANTI-FREEZE MODE

4 LIMIT TEMP COOLING MODE

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

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

] 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)

or

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

[5]-3. Basic functions

(1) Remote controller main/sub setting

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

1

Main

2

Sub

The controller will be designated as the main controller.

The controller will be designated as the sub controller.

(2) Use of clock setting


1

ON The function.

2

OFF The function.

(3) Timer function setting

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

1

WEEKLY TIMER (Default)

2

AUTO OFF TIMER

3

SIMPLE TIMER

4

TIMER MODE OFF

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

(4) Contact number setting

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

1

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

2

CALL **** *** **** The contact number will be displayed when a problem occurs.

CALL_ 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


1

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

2

OFF The offset value will not be displayed.

[5]-4. Display options

(1) Temperature unit °C/°F setting


1

°C

2

°F

Celcius

Fahrenheit

(2) Water temperature display setting


1

ON

2

OFF

The water temperature will be displayed.

The water temperature will not be displayed.

68


8. Main Specifications

[1] Model name

E A C V P 900 Y A N BS

BS: Salt proof type none: Standard type

N: Inside header piping type none: Standard piping type

A: Product sequence

Capacity control

V: Inverter type

C: Cooling only

A: Air Cooled type

E: High efficiency type

Capacity

Voltage series

Y: 3N ~ 380-400-415V

Refrigerant type

P: R410A

E A H V P 900 Y A -

H

N BS

BS: Salt proof type none: Standard type

N: Inside header piping type none: Standard piping type

H: Heating only none: Switchable heating and cooling

A: Product sequence

Capacity control

V: Inverter type

H: Heat pump

A: Air Cooled type

E: High efficiency type

Capacity

Voltage series

Y: 3N ~ 380-400-415V

Refrigerant type

P: R410A

69


[2] Specifications

a

Model

Power source

Cooling capacity

*1

<Except EAHV-P900YA-H(-N)(-BS)>

Heating capacity

*2

<Except EACV-P900YA(-N)(-BS)>

Maximum current input

Water pressure drop

Temp range

*6

Circulating water volume range

Sound pressure level (measured in anechoic room) at 1m

*6

Sound power level (measured in anechoic room)

*6

Diameter of water pipe

(Standard piping)

Diameter of water pipe

(Inside header piping)

Inlet

Outlet

Inlet

Outlet

External finish

External dimensions H x W x D

Net weight

Design pressure

Heat exchanger

Standard piping

Inside header piping

R410A

Water

Water side

Air side

Compressor

Fan

Type

Maker

Starting method

Quantity

Motor output

Case heater

Lubricant

Air flow rate

Power input *3 kW kcal/h

BTU/h kW

Current input 380-400-415V

EER (Pump input is not included)

A

ESEER (Pump input is not included)

EER (Includes pump input based on EN14511) *4

ESEER (Includes pump input based on EN14511) *5

Water flow rate m³/h kW kcal/h

Power input *3

Current input 380-400-415V

BTU/h kW

A

COP

COP (Includes pump input based on EN14511) *4

Water flow rate m³/h

A

Cooling

Heating

Outdoor kPa

ºC

ºF

ºC

ºF

ºC

ºF m

3

/h dB (A) dB (A) mm (in) mm (in) mm (in) mm (in) mm kg (lbs) kg (lbs)

MPa

MPa kW kW m

3

/min

L/s cfm

Protection

Refrigerant

Type, Quantity

Starting method

Motor output

High pressure protection

Inverter circuit

Compressor

Type x charge

Contorol kW

*1 Under normal cooling conditions at outdoor temp 35ºCDB/24ºCWB (95ºFDB/75.2ºFWB) outlet water temp 7ºC (44.6ºF) inlet water temp 12ºC (53.6ºF)

EAHV-P900YA(-H)(-N)(-BS)/EACV-P900YA(-N)(-BS)

3-phase 4-wire 380-400-415V 50/60Hz

90.00

77,400

307,080

27.27

46.0 - 43.7 - 42.2

3.30

5.66

3.08

5.46

15.5

90.00

77,400

307,080

25.71

43.4 - 41.2 - 39.7

3.50

3.25

15.5

61

135

Outlet water 5~25 *8




-15~43 *8

5~109.4 *8

7.7~25.8

65

77

50A (2B) housing type joint




Polyester powder coating steel plate

2450 x 2250 x 900

EAHV: 987 (2176)/EACV: 957 (2110)

EAHV: 1022 (2253)/EACV: 992 (2187)

4.15

1.0

Stainless steel plate and copper brazing

Plate fin and copper tube

Inverter scroll hermetic compressor

MITSUBISHI ELECTRIC CORPORATION

Inverter

2

11.7 x 2

0.045 x 2

MEL32

77 x 6

1283 x 6

2719 x 6

Propeller fan x 6

Inverter

0.19 x 6

High pres.Sensor & High pres.Switch at 4.15MPa (601psi)

Over-heat protection, Over current protection

Over-heat protection

R410A x 19(kg) x 2 *7

LEV

70


*2 Under normal heating conditions at outdoor temp 7ºCDB/6ºCWB (44.6ºFDB/42.8ºFWB) outlet water temp 45ºC (113ºF) inlet water temp 40ºC (104ºF)

*3 Pump input is not included.

*4 Pump is not included in e-series.

*5 Calculated based on EUROVENT condition.

*6 Under normal cooling or heating conditions capacity 90kW water flow rate 15.5m

3

/h

*7 Amount of factory-charged refrigerant is 6 (kg) × 2.

Please add the refrigerant at the field.

• Please do not use the steel material for the water piping.

• Please always make water circulate, or pull the circulation water out completely when not in use.

• Please do not use groundwater or well water in direct.

• The water circuit must be closed circuit.

• Due to continuous improvement, the above specifications may be subject to change without notice.

*8

140 60

-6, 55

25, 55

Hot water range

Cold water range

122

104

86

68

50

32

50

25, 50

-15, 45

40

-15, 30

25, 35

25, 30

30

20

-15, 25

10

-15, 12.6

-8, 5

0

-20 -10

-4 14

0 10 20

Outdoor temp (ºC)

32 50 68

Outdoor temp (ºF)

30

86

40

43, 50

43, 35

43, 25

43, 5

50

104 122

Unit converter kcal/h = kW x 860

BTU/h = kW x 3,412 lbs = kg/0.4536

cfm = m

3

/min x 35.31

71


Spec label

AIR-COOLED CHILLING UNIT

MODEL EAHV-P900YA <G>

0035

REFRIGERANT

R410A 19.0kg×2

LEGAL REFRIGERATION TON 10.60RT (5.30RT×2)

ALLOWABLE

PRESSURE(Ps)

HP 4.15MPa (41.5bar)

LP 2.21MPa (22.1bar)

WEIGHT

IP CODE

YEAR OF

MANUFACTURE

987kg

IP24

SERIAL No.

OPERATION

RATED VOLTAGE 3N~ V

FREQUENCY Hz

CAPACITY kW

kcal/h

Btu/h

RATED INPUT kW

EER/COP

RATED CURRENT

MAX CURRENT

RATED CONDITION

A

A

OUTLET WATER TEMP. °C

INLET WATER TEMP. °C

OUTDOOR DB/WB. °C

COOLING

380 400 415

50/60

90.0

77400

307080

29.2

3.08

27.6

3.25

46.0 43.7 42.2 43.4 41.2 39.7

61 61

7

12

35/24

HEATING

380 400 415

50/60

90.0

77400

307080

45

40

7/6

EER/COP and capacity according to

EN14511

Contains fluorinated greenhouse gases covered by the

Kyoto Protocol.

MANUFACTURER:


AIR-CONDITIONING & REFRIGERATION SYSTEMS WORKS

5-66, TEBIRA, 6-CHOME, WAKAYAMA CITY, JAPAN

MADE IN JAPAN

DWG.No.KC79R665H05

72


[3] Technical documentation of fan

TECHNICAL DOCUMENTATION

TECHNICAL DOCUMENTATION & PRODUCT INFORMATION

PRODUCT MODEL EAHV-P900YA(-H)(-N)(-BS)/EACV-P900YA(-N)(-BS)

Requirements

(1) Overall efficiency (%)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

Manufacturer

Pressure (Pa)

(10) Rotations per minute

(11) Specific ratio

(12)

Measurement category

Efficiency category

Efficiency grade (N)

VSD

Year of manufacture

Model number

Motor power input (kW)

Flow rate (m

3

/s)

Information relevant for facilitating disassembly, recycling or disposal at end-oflife

Information

34.2

A

STATIC

40

The VSD is integrated within the fan

2015


HEAD OFFICE: TOKYO BUILDING 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN

AUTHORIZED REPRESENTATIVE IN EU:

MITSUBISHI ELECTRIC EUROPE B.V.

HARMAN HOUSE, 1GEORGE STREET, UXBRIDGE, MIDDLESEX UB8 1QQ, U.K.

COMMERCIAL REGISTRATION NO.33279602

EAHV-P900YA(-H)(-N)(-BS)/EACV-P900YA(-N)(-BS)

0.19

1.28

50.6

820

1.0

Your product should be disposed of separately from household waste in line with local laws and regulations.

When this product reaches its end of life, dispose of it at your local waste collection point/recycling centre.

The separate collection and recycling of your product at the time of disposal will help conserve natural resources and ensure that it is recycled in a manner that protects human health and the environment.

For more information for WEEE recyclers please contact us at

(13)

(14)

Information relevant to minimise impact on the environment and ensure optimal life expectancy as regards installation, use and maintenance of the fan

Description of additional items used when determining the fan energy efficiency

-

In addition to daily checks (eg cleaning of filters), periodic maintenance and checks by a skilled technician are required to ensure that the unit is maintained in a good condition for a long period of time, and that it may be used with confidence.

73


74


75


This product is designed and intended for use in the residential, commercial and light-industrial environment.

The product at hand is based on the following

EU regulations:

• Low Voltage Directive 2006/95/EC

• Electromagnetic Compatibility Directive

2004/108/EC

• Pressure Equipment Directive 97/23/EC

• Machinery Directive 2006/42/EC

Please be sure to put the contact address/telephone number on this manual before handing it to the customer.

WT07511X01

HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN

Authorized representative in EU:MITSUBISHI ELECTRIC EUROPE B.V.

HARMAN HOUSE, 1 GEORGE STREET, UXBRIDGE, MIDDLESEX UB8 1QQ, U.K.

Mitsubishi Electric e-series EAHV-P900YA(-H)(-N)(-BS), EACV-P900YA(-N)(-BS) Chilling Unit Installation/Operation Manual

Assistant Bot

<ORIGINAL>

e-series

Air-cooled Chilling Unit

Installation/Operation Manual

EAHV/EACV

CONTENTS

Thoroughly read this manual prior to use.

Save this manual for future reference.

Some of the items in this manual may not apply to made-to-order units.

Make sure that this manual is passed on to the end users.

Safety Precautions

WARNING

CAUTION

IMPORTANT

General

WARNING

CAUTION

Transportation

WARNING

CAUTION

Installation

WARNING

CAUTION

Pipe installation

WARNING

CAUTION

Electrical wiring

CAUTION

Transportation and repairs

WARNING

CAUTION

IMPORTANT

1. Selecting the Installation Site

[1] Installation Conditions

<1> Protection against winds

<2> Cold Climate Installation

[2] Installation Space Requirement

<1> If there are no walls, etc. in surrounding area

<2> If there are walls, etc. in surrounding area

<3> If surrounding area enclosed by walls

2. Unit Installation

[1] Product suspension method

Warning:

[2] Center of gravity position

[3] Installation on foundation

Warning:

[4] Add the refrigerant

WARNING

CAUTION

Refrigerant charging

CAUTION

Manifold gauge

3. Water Pipe Installation

[1] Schematic Piping Diagram and Piping System Components

[2] Water piping attachment method

θθ

θ

[3] Notes on Pipe Corrosion

[4] Installing the Strainer and Flow Switch

<1> Installing the strainer

<2> Installing a flow switch

[5] Ensuring enough water in the water circuit

<1> Required amount of water

<2> Calculating the required amount of water in the water circuit

<3> Inlet/Outlet pipe connection size and material

[6] Water Piping Size and Location

<1> Standard piping type

375

983

750

250

750

1017

375

<2> Inside header piping type

(Case of right side piping)

(Case of left side piping)

125