Fujitsu AOTG45LBTC Installation Manual

AIR CONDITIONER
OUTDOOR UNIT
INSTALLATION MANUAL
PART No. 9374995585-02
1. SAFETY PRECAUTIONS
Be sure to read this manual carefully before installation.
The warnings and precautions indicated in this manual contain important information
pertaining to your safety. Be sure to observe them.
Hand this manual, together with the operating manual, to the customer. Request the
customer to keep them on hand for future use, such as for relocating or repairing the unit.
After installation, explain correct operation to the customer, using the operating manual.
WARNING
Indicates a potentially or imminently hazardous situation which,
if not avoided, could result in death or serious injury.
Never touch electrical components immediately after the power supply has been turned
off. Electrical shock may occur. After turning off the power, always wait 10 minutes or
more before touching electrical components.
30 model
36/45 model
Installation of this product must be done by experienced service technicians
or professional installers only in accordance with this manual. Installation by
nonprofessional or improper installation of the product may cause serious accidents
such as injury, water leakage, electric shock, or fire. If the product is installed in
disregard of the instructions in this manual, it will void the manufacturer’s warranty.
Do not turn on the power until all work has been completed. Turning on the power
before the work is completed can cause serious accidents such as electric shock or fire.
If refrigerant leaks while work is being carried out, ventilate the area. If the refrigerant
comes in contact with a flame, it produces a toxic gas.
Installation must be performed in accordance with regulations, codes, or standards for
electrical wiring and equipment in each country, region, or the installation place.
Do not use this equipment with air or any other unspecified refrigerant in the refrigerant
lines. Excess pressure can cause a rupture.
Contents
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
SAFETY PRECAUTIONS............................................................................................. 1
ABOUT THIS PRODUCT
2.1. Special tools for R410A....................................................................................... 2
2.2. Accessories......................................................................................................... 2
2.3. Optional parts...................................................................................................... 2
2.4. Operating range.................................................................................................. 2
GENERAL SPECIFICATION
3.1. Selecting circuit breaker and wiring.................................................................... 2
3.2. Selecting the pipe material.................................................................................. 3
3.3. Protection of pipes.............................................................................................. 3
3.4. Refrigerant pipe size and allowable piping length............................................... 3
INSTALLATION WORK
4.1. Selecting an installation location......................................................................... 3
4.2. Drain installation.................................................................................................. 4
4.3. Installation dimensions........................................................................................ 4
4.4. Transporting the unit........................................................................................... 5
4.5. Installation........................................................................................................... 5
PIPE INSTALLATION-1
5.1. Opening/Closing the service cover..................................................................... 6
5.2. Opening a knock out hole (36/45 model only)..................................................... 6
5.3. Pipe connection................................................................................................... 6
5.4. Sealing test......................................................................................................... 8
5.5. Vacuum process.................................................................................................. 8
5.6. Additional charging.............................................................................................. 8
ELECTRICAL WIRING
6.1. Notes for electrical wiring.................................................................................... 9
6.2. Knock out holes for wiring (36/45 model only).................................................... 9
6.3. Wiring method................................................................................................... 10
PIPE INSTALLATION-2
7.1. Installing insulation............................................................................................ 10
7.2. Protection for the intrusion of small animals (30 model only)............................ 10
7.3. Filling with putty (36/45 model only).................................................................. 11
DEMAND CONTROL (option)
8.1. Preparation for installation................................................................................ 11
8.2. Installation work................................................................................................ 11
8.3. Additional instructions....................................................................................... 13
HOW TO OPERATE THE DISPLAY UNIT (36/45 model only)
9.1. Display unit position.......................................................................................... 13
9.2. Description of display and buttons.................................................................... 14
FIELD SETTING (36/45 model only)
10.1. Field setting buttons.......................................................................................... 14
10.2. Function settings............................................................................................... 14
EXTERNAL INPUT AND OUTPUT
11.1. External input.................................................................................................... 16
11.2. External output.................................................................................................. 16
TEST RUN
12.1. Pre-test run check items................................................................................... 17
12.2. Test operation method....................................................................................... 17
ERROR CODES (36/45 model only)
13.1. Error display mode............................................................................................ 18
13.2. Error code check table...................................................................................... 18
PUMP DOWN
14.1. Pump down procedure...................................................................................... 19
During installation, make sure that the refrigerant pipe is attached firmly before you run
the compressor.
Do not operate the compressor under the condition of refrigerant piping not attached
properly with 3-way valve open. This may cause abnormal pressure in the refrigeration
cycle that leads to rupture and even injury.
When installing and relocating the air conditioner, do not mix gases other than the
specified refrigerant (R410A) to enter the refrigerant cycle.
If air or other gas enters the refrigerant cycle, the pressure inside the cycle will rise to
an abnormally high value and cause rupture, injury, etc.
To connect the indoor unit and outdoor unit, use air conditioner piping and cables
available locally as standard parts. This manual describes proper connections using
such installation set.
If the supply cable is damaged, it must be replaced by the manufacturer, its service
agent or similarly qualified persons in order to avoid a hazard.
Do not modify power cable, use extension cable or branch wiring. Improper use may
cause electric shock or fire by poor connection, insufficient insulation or over current.
Do not purge the air with refrigerants but use a vacuum pump to vacuum the installation.
There is no extra refrigerant in the outdoor unit for air purging.
Use a vacuum pump for R410A exclusively.
Using the same vacuum pump for different refrigerants may damage the vacuum pump
or the unit.
Use a clean gauge manifold, vacuum pump and charging hose for R410A exclusively.
During the pump down operation, make sure that the compressor is turned off before
you remove the refrigerant piping.
Do not remove the connection pipe while the compressor is in operation with 3-way
valve open. This may cause abnormal pressure in the refrigeration cycle that leads to
rupture and even injury.
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. Children should be supervised to ensure that they
do not play with the appliance.
To avoid danger of suffocation, keep the plastic bag or thin film used as the packaging
material away from young children.
CAUTION
Indicates a potentially hazardous situation that may result in
minor or moderate injury or damage to property.
For the air conditioner to work appropriately, install it as written in this manual.
This product must be installed by qualified personnel with a capacity certificate of
handling refrigerant fluids. Refer to regulation and laws in use on installation place.
The installation must be carried out in compliance with regulations in force in the place
of installation and the installation instructions of the manufacturer.
This product is part of a set constituting an air conditioner. The product must not be
installed alone or be installed with a device not authorized by the manufacturer.
When installing pipes shorter than 3 m, sound of the outdoor unit will be transferred to
the indoor unit, which will cause large operating sound or some abnormal sound.
Always use a separate power supply line protected by a circuit breaker operating on all
wires with a distance between contact of 3 mm for this unit.
To protect the persons, earth (ground) the product correctly, and use the power cable
combined with an Earth Leakage Circuit Breaker (ELCB).
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CAUTION
2.2. Accessories
This product is not explosion proof and therefore should not be installed in explosive
atmosphere.
This product contains no user-serviceable parts. Always consult experienced service
technicians for repairing.
When moving or relocating the air conditioner, consult experienced service technicians
for disconnection and reinstallation of the product.
Do not touch the fins of the heat exchanger. Touching the heat exchanger fins could
result in damage to the fins or personal injury such as skin rupture.
Precautions for using R410A refrigerant
WARNING
For installation purposes, be sure to use the parts supplied by the manufacturer or
other prescribed parts. The use of non-prescribed parts can cause serious accidents
such as the unit falling, water leakage, electric shock, or fire.
• The following installation parts are supplied. Use them as required.
• Keep the installation manual in a safe place and do not discard any other accessories
until the installation work has been completed.
Name and shape
Q’ty
Installation manual
1
WARNING
Do not introduce any substance other than the prescribed refrigerant into the
refrigeration cycle. If air enters the refrigeration cycle, the pressure in the refrigeration
cycle will become abnormally high and cause the piping to rupture.
If there is a refrigerant leak, make sure that it does not exceed the concentration limit.
If a refrigerant leak exceeds the concentration limit, it can lead to accidents such as
oxygen starvation.
Drain pipe
1
2
2
For power supply cable and connection
(36/45
model cable installation
only)
One-touch bush
The basic installation work procedures are the same as conventional refrigerant models.
However, pay careful attention to the following points:
•• Since the working pressure is 1.6 times higher than that of conventional refrigerant
(R22) models, some of the piping and installation and service tools are special. (Refer
to the table in "Special tools for R410A".)
Especially, when replacing a conventional refrigerant (R22) model with a new
refrigerant R410A model, always replace the conventional piping and flare nuts with
the R410A piping and flare nuts.
•• Models that use refrigerant R410A have a different charging port thread diameter
to prevent erroneous charging with conventional refrigerant (R22) and for safety.
Therefore, check beforehand. [The charging port thread diameter for R410A is
1/2-20 UNF.]
•• Be careful that foreign matter (oil, water, etc.) does not enter the piping than with
refrigerant models. Also, when storing the piping, securely seal the openings by
pinching, taping, etc.
•• When charging the refrigerant, take into account the slight change in the composition
of the gas and liquid phases. And always charge from the liquid phase where
refrigerant composition is stable.
2. ABOUT THIS PRODUCT
2.3. Optional parts
Parts name
Model name
External connect kit
(for External input/output)
UTY-XWZXZ3
Demand control option PCB kit
UTY-XCZZ5
2.4. Operating range
Outdoor
Cooling/Dry Mode
Heating Mode
Temperature
About -15 °C to 46 °C
About -15 °C to 24 °C
3. GENERAL SPECIFICATION
3.1. Selecting circuit breaker and wiring
2.1. Special tools for R410A
WARNING
To install a unit that uses R410A refrigerant, use dedicated tools and piping materials that
have been manufactured specifically for R410A use. Because the pressure of R410A
refrigerant is approximately 1.6 times higher than R22, failure to use dedicated piping
material or improper installation can cause rupture or injury. Furthermore, it can cause
serious accidents such as water leakage, electric shock, or fire.
Tool name
Gauge manifold
Charge hose
Vacuum pump
Gas leakage
detector
Contents of change
Pressure is high and cannot be measured with a conventional
gauge. To prevent erroneous mixing of other refrigerants, the
diameter of each port has been changed.
It is recommended the gauge with seals –0.1 to 5.3 MPa
(-1 to 53 bar) for high pressure. –0.1 to 3.8 MPa (-1 to 38 bar)
for low pressure.
To increase pressure resistance, the hose material and base
size were changed.
A conventional vacuum pump can be used by installing a
vacuum pump adapter.
Special gas leakage detector for HFC refrigerant R410A.
Copper pipes
It is necessary to use seamless copper pipes and it is desirable that the amount of residual oil is less than 40 mg/10 m. Do not use copper pipes having a collapsed, deformed
or discolored portion (especially on the interior surface). Otherwise, the expansion valve
or capillary tube may become blocked with contaminants.
As an air conditioner using R410A incurs pressure higher than when using conventional
refrigerant, it is necessary to choose adequate materials.
For outdoor unit drain piping work
(May not be supplied, depending on
the model.)
Drain cap
Do not touch refrigerant that has leaked from the refrigerant pipe connections or other
areas. Touching the refrigerant directly can cause frostbite.
If a refrigerant leak occurs during operation, immediately vacate the premises and
thoroughly ventilate the area. If the refrigerant comes in contact with a flame, it produces
a toxic gas.
Description
This manual
CAUTION
Be sure to install a breaker of the specified capacity.
Before the electrical work, confirm electrical standards and regulations in each country,
region, or installing place. Then select appropriate cables and breakers that comply
with them.
Cable
Cable size [mm²]
Power Supply Cable
Connection Cable
Type
Remarks
4
Type60245 IEC66
2 Cable + Earth
(Ground)
1 Φ 240 V
1.5
Type60245 IEC57
3 Cable + Earth
(Ground)
1 Φ 240 V
* Cable length: Limit the voltage drop to less than 2 %. Increase the cable diameter if the
voltage drop is 2 % or more.
Breaker
Circuit breaker (over current)
Specification
30 model
Current : 25 (A)
36/45 model
Earth leakage breaker
Current : 32 (A)
Leakage current : 30mA 0.1sec or less
• Selected sample: Select the correct cable type and size according to the country or
region’s regulations.
• Select the breaker so that enough load current can pass through it.
• Before starting work check that power is not being supplied to all poles of the indoor
unit and outdoor unit.
• Install all electrical works in accordance to standard.
• Install the disconnect device with a contact gap of at least 3 mm in all poles nearby
the units. (Both indoor unit and outdoor unit)
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3.4.2. If additional refrigerant is required
3.2. Selecting the pipe material
• When the piping is longer than Pre-charge length, additional charging is necessary.
• For the additional amount, refer to the following table.
CAUTION
Additional charging amount
Do not use existing pipes.
Use pipes that have clean external and internal sides without any contamination which
may cause trouble during use, such as sulfur, oxide, dust, cutting waste, oil, or water.
It is necessary to use seamless copper pipes.
Material: Phosphor deoxidized seamless copper pipes.
It is desirable that the amount of residual oil is less than 40 mg/10 m.
Do not use copper pipes that have a collapsed, deformed, or discolored portion
(especially on the interior surface). Otherwise, the expansion valve or capillary tube
may become blocked with contaminants.
Refrigerant pipe size
[mm (in.)]
• Thicknesses of copper pipes used with R410A are as shown in the table.
• Never use copper pipes thinner than those indicated in the table even if they are
available on the market.
Thicknesses of Annealed Copper Pipes (R410A)
Pipe outside diameter [mm (in.)]
6.35 (1/4)
9.52 (3/8)
12.70 (1/2)
15.88 (5/8)
19.05 (3/4)
Thickness [mm]
0.80
0.80
0.80
1.00
1.20
• Protect the pipes to prevent the entry of moisture and dust.
• Especially, pay attention when passing the pipes through a hole or connecting the
end of a pipe to the outdoor unit.
Outdoor
Indoor
Working period
1 month or more
Less than 1 month
-
Protection method
Pinch pipes
Pinch or tape pipes
Pinch or tape pipes
3.4. Refrigerant pipe size and allowable piping
length
CAUTION
Keep the piping length between the indoor unit and outdoor unit within the allowable
tolerance.
The maximum lengths of this product are shown in the table. If the units are further
apart than this, correct operation cannot be guaranteed.
Pipe diameter <Liquid/Gas> [mm (in.)]
[m]
50
Min. piping length (L)
[m]
5
Max. height difference (H)
[m]
View (Example)
g/m
None
400 g
800 g
1,200 g
40 g/m
sd*
*
4. INSTALLATION WORK
Make sure to obtain the customer’s approval for selecting and installing the outdoor unit.
4.1. Selecting an installation location
WARNING
Securely install the outdoor unit at a location that can withstand the weight of the unit.
Otherwise, the outdoor unit may fall and cause injury.
Be sure to install the outdoor unit as prescribed, so that it can withstand earthquakes
and typhoons or other strong winds. Improper installation can cause the unit to topple
or fall, or other accidents.
Do not install the outdoor unit near the edge of a balcony. Otherwise, children may
climb onto the outdoor unit and fall off of the balcony.
Piping length (L) *Pre-Charge [m]
• Area with high salt content, such as at the seaside. It will deteriorate metal parts,
causing the parts to fail or the unit to leak water.
• Area filled with mineral oil or containing a large amount of splashed oil or steam,
such as a kitchen. It will deteriorate plastic parts, causing the parts to fail or the unit
to leak water.
• Area that generates substances that adversely affect the equipment, such as
sulfuric gas, chlorine gas, acid, or alkali. It will cause the copper pipes and brazed
joints to corrode, which can cause refrigerant leakage.
• Area containing equipment that generates electromagnetic interference. It will
cause the control system to malfunction, preventing the unit from operating
normally.
• Area that can cause combustible gas to leak, contains suspended carbon fibers or
flammable dust, or volatile inflammables such as paint thinner or gasoline. If gas
leaks and settles around the unit, it can cause a fire.
• Area that has heat sources, vapors, or the risk of the leakage of flammable gas in
the vicinity.
• Area where small animals may live. It may cause failure, smoke or fire if small
animals enter and touch internal electrical parts.
Install the outdoor unit in a well-ventilated location away from rain or direct sunlight.
30
If the outdoor unit must be installed in an area within easy reach of the general public,
install as necessary a protective fence or the like to prevent their access.
H
3.4.1. For Pre-charge length
Do not install the outdoor unit in the following areas:
Do not tilt the outdoor unit more than 3 degrees. However, do not install the unit with it
tilted towards the side containing the compressor.
L
20
15.88 (5/8)
50 m
• Area where animals may urinate on the unit or ammonia may be generated.
9.52 (3/8) / 15.88 (5/8)
Max. piping length (L)
<Indoor unit to outdoor unit>
Gas
40 m
CAUTION
3.3. Protection of pipes
Location
9.52 (3/8)
30 m
* For instructions on additional charging, refer to “5.6. Additional charging”.
d
s
Improper pipe selection will degrade performance. As an air conditioner using R410A
incurs pressure higher than when using conventional refrigerant, it is necessary to
choose adequate materials.
Liquid
Piping length (L)
~20 m
Install the outdoor unit in a location that would not inconvenience your neighbors, as
they could be affected by the airflow coming out from the outlet, noise, or vibration. If it
must be installed in proximity to your neighbors, be sure to obtain their approval.
If the outdoor unit is installed in a cold region that is affected by snow accumulation,
snow fall, or freezing, take appropriate measures to protect it from those elements. To
ensure a stable operation, install inlet and outlet ducts.
Install the outdoor unit in a location that is away from exhaust or the vent ports that
discharge vapor, soot, dust, or debris.
Install the indoor unit, outdoor unit, power supply cable, connection cable, and remote
controller cable at least 1 m away from a television or radio receivers. The purpose of
this is to prevent TV reception interference or radio noise. (Even if they are installed
more than 1 m apart, you could still receive noise under some signal conditions.)
If children under 10 years old may approach the unit, take preventive measures so that
they cannot reach the unit.
Keep the length of the piping of the indoor and outdoor units within the allowable range.
For maintenance purposes, do not bury the piping.
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4.3.1. Single outdoor unit installation
4.2. Drain installation
When the upward area is open (Unit : mm)
* Dimensions for: * 30 model / ** 36/45 model
CAUTION
Perform drain work in accordance with this manual, and ensure that the drain water
is properly drained. If the drain work is not carried out correctly, water may drip down
from the unit, wetting the furniture.
(1) Obstacles at rear only
(2) Obstacles at rear and sides
When the outdoor temperature is 0 °C or less, do not use the accessory drain pipe
and drain cap. If the drain pipe and drain cap are used, the drain water in the pipe may
freeze in extremely cold weather. (Reverse cycle model only)
• If you are installing the drain pipe and drain caps, Drain pipe mounting hole
please provide a working space under the base of
Base of the outdoor unit
the outdoor unit.
• As the drain water flows out of the outdoor unit
during heating operation, install the drain pipe and
connect it to a commercial 16 mm hose. (Reverse
cycle model only)
• When installing the drain pipe, plug all the holes
other than the drain pipe mounting hole in the
Drain pipe
bottom of the outdoor unit with putty so there is no
water leakage. (Reverse cycle model only)
100
or more
(3) Obstacles at front only
100*/200**
or more
250*/200**
or more
300
or more
(4) Obstacles at front and rear
(Unit : mm)
■ 30 model
100 or more
500 or more
AIR
500 or more
Drain cap mounting hole
When an obstruction is present also in the upward area (Unit : mm)
302
265
188
* Dimensions for: * 30 model / ** 36/45 model
(1) Obstacles at rear and above
(2)Obstacles at rear, sides, and above
Max. 500
51
Max. 500
600*/
1000**
or more
439
623
1000
or more
Drain pipe mounting hole
■ 36/45 model
300
or more
AIR
Drain cap mounting hole
100*/200**
or more 250
500
or more
or more
341
305
227
4.3.2. Multiple outdoor unit installation
• Provide at least 250 mm of space between the outdoor units if multiple units are
installed.
• When routing the piping from the side of an outdoor unit, provide space for the piping.
50
• No more than 3 units must be installed side by side.
When 3 units or more are arranged in a line, provide the space as shown in the
following example when an obstruction is present also in the upward area.
438
622
Drain pipe mounting hole
When the upward area is open (Unit : mm)
(1) Obstacles at rear only
(2) Obstacles at front only
4.3. Installation dimensions
CAUTION
The installation space shown in the following examples is based on an ambient
temperature under cooling operation of 35 °C (DB) at the air intake of the outdoor unit.
Provide more space around the air intake than shown in the examples if the ambient
temperature exceeds 35 °C (DB) or if the thermal load of all of the outdoor units
exceeds the capacity.
Consider the transportation route, installation space, maintenance space, and access,
and install the unit in a location with sufficient space for the refrigerant piping.
250
or more
250
or more
1500
or more
300
or more
(3) Obstacles at front and rear
Installation methods not shown in the following examples are not recommended.
Performance may drop significantly.
■ 36/45 model only
250
or more
CAUTION
Keep the space shown in the installation
examples.
If the installation is not performed
accordingly, it could cause a short
circuit and result in a lack of operating
performance.
Do not obstruct the air intake of the
outdoor unit with piping, wiring, stand,
etc.
500 or more
1500 or more
Air intake
Rear view
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When an obstruction is present also in the upward area (Unit : mm)
■ 36/45 model
• Obstacles at rear and above
Max. 300
Handle
Handle
1500
or more
1500
or more
500 or more
4.3.3. Outdoor units installation in multi row (Unit : mm)
* Dimensions for: * 30 model / ** 36/45 model
(1) Single parallel unit arrangement
150* / 500** or more
2000* / 3000** or more
600 or more
1000* / 1500** or more
(2) Multiple parallel unit arrangement
25
0o
0o
rm
ore
• Install 4 anchor bolts at the locations indicated with arrows in the figure.
• To reduce vibration, do not install the unit directly on the ground. Install it on a secure
base (such as concrete blocks).
• The foundation shall support the legs of the unit and have a width of 50 mm or more.
• Depending on the installation conditions, the outdoor unit may spread its vibration
during operation, which may cause noise and vibration. Therefore, attach damping
materials (such as damping pads) to the outdoor unit during installation.
• Install the foundation, making sure that there is enough space for installing the
connection pipes.
Bolt Nut
• Secure the unit to a solid block using foundation
bolts.
Block
(Use 4 sets of commercially available M10 bolts,
nuts, and washers.)
• The bolts should protrude 20 mm. (Refer to the
figure.)
• If overturning prevention is required, purchase the necessary commercially available
items.
(Unit : mm)
rm
ore
500 or more
■ 30 model
3000* / 3500** or more
600 or more
1500 or more
132
650
50
AIR
119
50
16
25
4.5. Installation
20 mm
250
or more
363
■ 30 model only
150
4 × Φ 12 hole
■ 36/45 model
166
250 or more
1500 or more
50
50
16
500 or more
154
650
AIR
410
4.4. Transporting the unit
WARNING
Do not touch the fins. Otherwise, personal injury could result.
CAUTION
When carrying the unit, hold the handles on the right and left sides and be careful.
If the outdoor unit is carried from the bottom, hands or fingers may be pinched.
• Be sure to hold the handles on the sides of the unit. Otherwise, the suction grilles on
the sides of the unit may be deformed.
4 × Φ 12 hole
• Do not install directly on the ground, this may result in equipment failure.
• Provide ample space for ice buildup from condensate between the bottom of the unit
and the flat surface on which it is mounted. Otherwise, there is risk that the drainage
water will freeze between the device and the surface, disabling drainage.
CAUTION
■ 30 model
Handle
Base
If the unit is installed in a region that is exposed to high winds,
freezing conditions, freezing rain, snow fall or heavy snow
accumulation, take appropriate measures
to protect it from those elements.
To ensure stable operation, the outdoor
unit must be installed on a raised stand
or rack, at or above the anticipated snow
depth for the region.
The installation of snow hoods and drift
prevention fencing is recommended
when blowing and drifting snow is
common to the region.
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sd
Fig. A
5. PIPE INSTALLATION-1
5.1. Opening/Closing the service cover
5.1.1. Opening the service cover
• Remove the tapping screws. (2 places)
• Remove the service cover by pushing downwards.
• Remove the valve cover with one screw. (30 model)
■ 30 model
Service cover
Hook (3 places)
Direction of the
service cover
removal
Service cover
Valve cover
Remove one
screw
Slide upward
to remove
Front
connection
Hook (4 places)
Lateral
connection
Fig. B
■ 36/45 model
Bottom
connection
Rear
connection
Fig. C
Screws
Slit
Direction of the
service cover
removal
Slit
Service cover
Bottom
connection
5.1.2. Closing the service cover
Reverse the procedures in “5.1.1. Opening the service cover”.
NOTES:
• Do not pinch the cables with the valve cover.
• Before closing the covers, install insulation and other devices (options) mentioned.
5.2. Opening a knock out hole (36/45 model only)
CAUTION
Be careful not to deform or scratch the panel while opening the knock out holes.
To protect the piping insulation after opening a knock out hole, remove any burrs from
the edge of the hole. It is recommended to apply rust prevention paint to the edge of
the hole.
• Pipes can be connected from 4 directions, front, lateral side, rear side and bottom.
(Fig. A)
• When connecting at the bottom, remove the service panel and piping cover on the
front of the outdoor unit, and open the knock out hole provided at the bottom corner
of the piping outlet.
• It can be installed as shown on “Fig. B” cutting out the 2 slits as indicated on “Fig. C”.
(When cutting slits, use a steel saw.)
5.3. Pipe connection
5.3.1. Brazing
CAUTION
If air or another type of refrigerant enters the refrigeration cycle, the internal pressure in
the refrigeration cycle will become abnormally high and prevent the unit from exerting
its full performance.
Apply nitrogen gas while brazing the pipes. If a pipe is brazed without applying nitrogen gas, an oxidation film will be created.
This can degrade performance or damage the parts
Pressure regulating valve
Cap
in the unit (such as the compressor or valves).
Nitrogen gas pressure: 0.02 MPa
(= pressure felt sufficiently on the back of the hand)
Nitrogen gas
Brazing area
For brazing material, use phosphor copper that does not require flux. Do not use flux to
braze pipes. If the flux is the chlorine type, it will cause the pipes to corrode.
Furthermore, if the flux contains fluoride, it will adversely affect the refrigerant pipe
system such as by degrading the refrigerant.
If fluoride is contained, quality of refrigerant deteriorates and affects the refrigerant
piping system.
5.3.2. Flaring
CAUTION
Do not use mineral oil on a flared part. Prevent mineral oil from getting into the system
as this would reduce the lifetime of the units.
• Use special pipe cutter and flare tool exclusive for R410A.
(1) Cut the connection pipe to the necessary length with a pipe cutter.
(2) Hold the pipe downward so that the cuttings will not enter the pipe and remove any
burrs.
(3) Insert the flare nut (always use the flare nut attached to the indoor and outdoor
units respectively) onto the pipe and perform the flare processing with a flare tool.
Leakage of refrigerant may result if other flare nuts are used.
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(4) Protect the pipes by pinching them or with tape to prevent dust, dirt, or water from
entering the pipes.
Check if [L] is flared uniformly
and is not cracked or scratched.
Die
Pipe outside diameter
[mm (in.)]
6.35 (1/4)
9.52 (3/8)
12.70 (1/2)
15.88 (5/8)
19.05 (3/4)
B
A
Pipe
0
Dimension B-0.4
[mm]
0 to 0.5
9.1
13.2
16.6
19.7
24.0
Pipe outside
diameter [mm (in.)]
6.35 (1/4)
9.52 (3/8)
12.70 (1/2)
15.88 (5/8)
19.05 (3/4)
Tightening torque [N·m (kgf·cm)]
16 to 18 (160 to 180)
32 to 42 (320 to 420)
49 to 61 (490 to 610)
63 to 75 (630 to 750)
90 to 110 (900 to 1100)
■ 30 model
Dimension A [mm]
Flare tool for R410A,
clutch type
• When using conventional flare tools to flare R410A pipes, the dimension A should
be approximately 0.5 mm more than indicated in the table (for flaring with R410A
flare tools) to achieve the specified flaring. Use a thickness gauge to measure the
dimension A.
Width across flats
Flare nut [mm (in.)]
6.35 (1/4) dia.
9.52 (3/8) dia.
12.70 (1/2) dia.
15.88 (5/8) dia.
19.05 (3/4) dia.
Width across flats
of Flare nut [mm]
17
22
26
29
36
3-way valve
(Liquid)
Flare nut
Holding wrench
Connection
pipe (Liquid)
Body side
3-way valve
(Gas)
90°
Torque wrench
Flare nut
Connection pipe
(Gas)
■ 36/45 model
3-way valve (Liquid)
3-way valve (Gas)
Flare nut
Flare nut
Connection pipe
(Liquid)
5.3.3. Bending pipes
Connection pipe
(Gas)
CAUTION
To prevent breaking of the pipe, avoid sharp bends. Bend the pipe with a radius of
curvature of 100 mm to 150 mm.
Flare nut
Torque
wrench
If the pipe is bent repeatedly at the same place, it will break.
90°
• If pipes are shaped by hand, be careful not to collapse them.
• Do not bend the pipes at an angle of more than 90°.
• When pipes are repeatedly bent or stretched, the material will harden, making it
difficult to bend or stretch them anymore.
5.3.4. Connecting pipes
Torque wrench
Holding
wrench
• Do not bend or stretch the pipes more than three times.
5.3.5. Handling precautions for the valves
CAUTION
Be sure to install the pipe against the port on the indoor unit and the outdoor unit
correctly. If the centering is improper, the flare nut cannot be tightened smoothly. If the
flare nut is forced to turn, the threads will be damaged.
Do not remove the flare nut from the outdoor unit pipe until immediately before
connecting the connection pipe.
After installing the piping, make sure that the connection pipes do not touch the
compressor or outer panel. If the pipes touch the compressor or outer panel, they will
vibrate and produce noise.
(1) Detach the caps and plugs from the pipes.
(2) Center the pipe against the port on the outdoor unit, and then turn the flare nut by
hand.
(3) Tighten the flare nut of the connection pipe at the outdoor unit valve connector.
(4) After tightening the flare nut by hand, use a torque wrench to fully tighten it.
• Mounted part of blank cap is sealed for protection.
• Fasten blank cap tightly after opening valves.
Table A
Blank cap [mm (in.)]
6.35 (1/4)
9.52 (3/8)
12.70 (1/2)
15.88 (5/8)
19.05 (3/4)
Operating the valves
• Use a hexagon wrench (size 4 mm).
• Opening
Fasten a flare nut with a torque wrench as instructed in this manual. If fastened too
tight, the flare nut may be broken after a long period of time and cause a leakage of
refrigerant.
• Outer panel may be distorted if fastened only with a wrench. Be sure to fix the
elementary part with a spanner and fasten with a wrench (refer to the following
figures).
(1) Insert the hexagon wrench into the valve shaft, and turn it
counterclockwise.
(2) Stop turning when the valve shaft can no longer be turned.
CAUTION
Hold the torque wrench at its grip, keeping it in a right angle with the pipe, in order to
tighten the flare nut correctly.
Tightening torque [N·m (kgf·cm)]
20 to 25 (200 to 250)
20 to 25 (200 to 250)
28 to 32 (280 to 320)
30 to 35 (300 to 350)
35 to 40 (350 to 400)
(Open position)
• Closing
(1) Insert the hexagon wrench into the valve shaft, and turn it clockwise.
(2) Stop turning when the valve shaft can no longer be turned.
(Closed position)
Opening direction
Opening direction
Hexagon wrench
Seal (blank cap
installation portion)
• Do not apply force to the blank cap of the valve or hang a wrench, etc., on the cap. It may
cause leakage of refrigerant.
Liquid pipe
Gas pipe
To prevent gas leakage, coat the
flare surface with refrigerator oil.
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Gauge manifold
5.4. Sealing test
Lo
WARNING
Hi
Vacuum pump
Before operating the compressor, install the pipes and securely connect them.
Otherwise, if the pipes are not installed and if the valves are open when the compressor
operates, air could enter the refrigeration cycle. If this happens, the pressure in the
refrigeration cycle will become abnormally high and cause damage or injury.
After the installation, make sure there is no refrigerant leakage. If the refrigerant leaks
into the room and becomes exposed to a source of fire such as a fan heater, stove, or
burner, it produces a toxic gas.
Do not subject the pipes to strong shocks during the sealing test. It can rupture the
pipes and cause serious injury.
Service hose
CAUTION
Do not block the walls and the ceiling until the sealing test and the charging of the
refrigerant gas have been completed.
■ 36/45 model
After connecting the pipes, perform a sealing test.
Service hose with valve core
Charging port cap
(1) Make sure that the 3-way valves are closed before performing a sealing test.
Charging port
(2) Pressurize nitrogen gas to 4.15 MPa to perform the sealing test.
Blank cap
(3) Add nitrogen gas to both the liquid pipes and the gas pipes.
3-way valve
(4) Check all flared and brazed connections. Then, check that the pressure has not
decreased.
Connecting pipe
(5) Compare the pressures after pressurizing and letting it stand for 24 hours, and
check that the pressure has not decreased.
* When the outdoor air temperature changes 5 °C, the test pressure changes
0.05 MPa. If the pressure has dropped, the pipe joints may be leaking.
Gauge manifold
Hexagon wrench
(6) If a leak is found, immediately repair it and perform the sealing test again.
(7) After completing the sealing test, release the nitrogen gas from both valves.
Use a 4 mm
hexagon
wrench
(8) Release the nitrogen gas slowly.
Vacuum pump
5.5. Vacuum process
Service hose
CAUTION
Be sure to evacuate the refrigerant system using a vacuum pump.
The refrigerant pressure may sometimes not rise when a closed valve is opened after
the system is evacuated using a vacuum pump. This is caused by the closure of the
refrigerant system of the outdoor unit by the electronic expansion valve. This will not
affect the operation of the unit.
5.6. Additional charging
WARNING
If the system is not evacuated sufficiently, its performance will drop.
Use a clean gauge manifold and charging hose that were designed specifically for use
with R410A. Using the same vacuum equipment for different refrigerants may damage
the vacuum pump or the unit.
Do not purge the air with refrigerants, but use a vacuum pump to evacuate the system.
(1) Check that the valves are closed by removing the blank caps from the gas and
liquid pipes.
(2) Remove the charging port cap, and connect the gauge manifold and the vacuum
pump to the charging valve with the service hoses.
(3) Vacuum the indoor unit and the connecting pipes until the pressure gauge
indicates –0.1 MPa (–76 cmHg).
(4) When –0.1 MPa (–76 cmHg) is reached, operate the vacuum pump for at least 60
minutes.
(5) Disconnect the service hoses and fit the charging port cap to the charging valve to
the specified torque. (Refer to the following table)
(6) Remove the blank caps, and fully open the spindles of 3-way valves with a
hexagon wrench [Torque: 6 to 7 N·m (60 to 70 kgf·cm)].
(7) Tighten the blank caps of the 3-way valve to the specified torque.
(Refer to the following table)
9.52 mm (3/8 in.)
15.88 mm (5/8 in.)
Charging port cap
Blank cap
Tightening torque
20 to 25 N·m (200 to 250 kgf·cm)
30 to 35 N·m (300 to 350 kgf·cm)
10 to 12 N·m (100 to 120 kgf·cm)
When moving and installing the air conditioner, do not mix gas other than the specified
refrigerant R410A inside the refrigerant cycle.
If air or other gas enters the refrigerant cycle, the pressure inside the cycle will rise to
an abnormally high value and cause breakage, injury, etc.
CAUTION
After vacuuming the system, add refrigerant.
Do not reuse recovered refrigerant.
When charging the refrigerant R410A, always use an electronic scales for refrigerant
charging (to measure the refrigerant by weight). Adding more refrigerant than the
specified amount will cause a malfunction.
When charging the refrigerant, take into account the slight change in the composition
of the gas and liquid phases, and always charge from the liquid phase side whose
composition is stable. Adding refrigerant through the gas pipe will cause a malfunction.
Check if the steel cylinder has a siphon installed or not before filling. (There is an
indication “with siphon for filling liquid” on the steel cylinder.)
Filling method for cylinder with siphon
R410A
Gas
Set the cylinder vertical and fill with the liquid.
(Liquid can be filled without turning bottom up with the siphon
inside.)
Liquid
■ 30 model
Filling method for other cylinders
Outdoor unit
R410A
Gas
Turn bottom up and fill with liquid.
(Be careful to avoid turning over the cylinder.)
Liquid
Service hose
with valve core
Cap
Charging port
Connecting pipe
3-way valve (Gas)
Blank cap
Hexagon wrench
Use a 4 mm
hexagon wrench.
Be sure to use the special tools for R410A for pressure resistance and to avoid mixing
of impure substances.
If the units are further apart than the maximum pipe length, correct operation cannot
be guaranteed.
Make sure to back closing valve after refrigerant charging. Otherwise, the compressor
may fail.
Minimize refrigerant release to the air. Excessive release is prohibited under the Freon
Collection and Destruction Law.
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6. ELECTRICAL WIRING
6.1. Notes for electrical wiring
WARNING
Wiring connections must be performed by a qualified person in accordance with the
specifications. The voltage rating for this product is 220-240 V at 50 Hz. It should be
operated within the range of 198 to 264 V.
Before connecting the wires, make sure the power supply is off.
CAUTION
The static electricity that is charged to the human body can damage the control PC
Board when handling the control PC Board for address setting, etc.
Please keep caution to the following points.
Provide the earthing (grounding) of the indoor unit, outdoor unit and option equipment.
Cut off the power supply (breaker).
Touch the metal section (such as the unpainted control box section) of the indoor or
outdoor unit for more than 10 seconds. Discharge the static electricity in your body.
Never touch the component terminal or pattern on the PC Board.
How to connect wiring to the terminal
Never touch electrical components immediately after the power supply has been
turned off. Electrical shock may occur. After turning off the power, always wait 10
minutes or more before touching electrical components.
Caution when wiring cable
Use a dedicated power supply circuit. Insufficient power capacity in the electrical circuit
or improper wiring may cause electric shock or fire.
(1) Use ring terminals with insulating sleeves as shown in the figure below to connect
to the terminal block.
Be sure to install an earth leakage breaker. Otherwise, it will cause electric shock or
fire.
(2) Securely clamp the ring terminals to the wires using an appropriate tool so that the
wires do not come loose.
• When stripping off the coating of a lead wire, always use a special tool such as a wire
stripper. If there is no special tool available, carefully strip the coating with a knife etc.
Strip : 10 mm
A circuit breaker is installed in the permanent wiring. Always use a circuit that can trip
all the poles of the wiring and has an isolation distance of at least 3 mm between the
contacts of each pole.
Ring terminal
Use designated cables and power cables. Improper use may cause electric shock or
fire by poor connection, insufficient insulation, or over current.
Do not modify power cable, use extension cable or branch wiring. Improper use may
cause electric shock or fire by poor connection, insufficient insulation or over current.
Connect the connector cable securely to the terminal. Check no mechanical force
bears on the cables connected to the terminals. Faulty installation can cause a fire.
Use ring terminals and tighten the terminal screws to the specified torques, otherwise,
abnormal overheating may be produced and possibly cause serious damage inside
the unit.
Make sure to secure the insulation portion of the connector cable with the cable clamp.
Damaged insulation can cause a short circuit.
Fix cables so that cables do not make contact with the pipes (especially on high
pressure side). Do not make power supply cable and connection cable come in contact
with valves (Gas).
Sleeve
(3) Use the specified wires, connect them securely, and fasten them so that there is no
stress placed on the terminals.
(4) Use an appropriate screwdriver to tighten the terminal screws. Do not use a
screwdriver that is too small, otherwise, the screw heads may be damaged and
prevent the screws from being properly tightened.
(5) Do not tighten the terminal screws too much, otherwise, the screws may break.
Ring terminal
Wire
Ring terminal
Do not connect the power supply to the transmission line terminal board. Improper
wiring can damage the entire system.
Terminal blocks
Never install a power factor improvement condenser. Instead of improving the power
factor, the condenser may overheat.
Be sure to perform the earthing (grounding) work.
Do not connect earth (ground) wires to a gas pipe, water pipe, lightning rod or earthing
(grounding) wire for a telephone.
• Connection to a gas pipe may cause a fire or explosion if gas leaks.
• Connection to a water pipe is not an effective earthing (grounding) method if PVC
pipe is used.
• Connection to the earth (ground) wire of a telephone or to a lightning rod may
cause a dangerously abnormal rise in the electrical potential if lightning strikes.
• Improper earthing (grounding) work can cause electric shocks.
Securely install the electrical box cover on the unit. An improperly installed service
panel can cause serious accidents such as electric shock or fire through exposure to
dust or water.
CAUTION
The primary power supply capacity is for the air conditioner itself, and does not include
the concurrent use of other devices.
Do not use crossover power supply wiring for the outdoor unit.
If the electrical power is inadequate, contact your electric power company.
Install a breaker in a location that is not exposed to high temperatures.
If the temperature surrounding the breaker is too high, the amperage at which the
breaker cuts out may decrease.
When using an earth leakage breaker that has been designed solely for earth (ground)
fault protection, be sure to install a fuse-equipped switch or circuit breaker.
Screw with
special washer
Screw with special washer
Wire
(6) Refer to the table below for the terminal screw tightening torques.
Tightening torque [N·m (kgf·cm)]
M4 screw
1.2 to 1.8 (12 to 18)
M5 screw
2.0 to 3.0 (20 to 30)
6.2. Knock out holes for wiring (36/45 model only)
CAUTION
Be careful not to deform or scratch the panel while opening the knock out holes.
When cables are routed from the unit, a protection sleeve for the conduits can be
inserted at the knock out hole.
If you do not use a wire conduit, be sure to protect the wires to prevent the edge of the
knock out hole from cutting the wires.
It is recommended to apply anti-rust paint to the edge of the knock out hole.
• Knock out holes are provided 2 each in the same size in front, lateral and rear sides.
Installation method of One-touch bush
Please fix the one-touch bush (accessory) as shown below.
Front connection
Lateral connection
Rear connection
If the temperature surrounding the breaker is too high, the amperage at which the
breaker cuts out may decrease.
This system uses an inverter, which means that it must be used an earth leakage
breaker that can handle harmonics in order to prevent malfunctioning of the earth
leakage breaker itself.
When the electrical switchboard is installed outdoors, place it under lock and key so
that it is not easily accessible.
Start wiring work after closing branch switch and over current breaker.
Connection cable between indoor unit and outdoor unit is 230 V.
(Pipe cover front)
(Pipe cover rear)
Be sure not to remove thermistor sensor etc. from power wiring and connection wiring.
Compressor may fail if operated while removed.
Do not fasten the power supply cable and connection cable together.
Always keep to the maximum length of the connection cable. Exceeding the maximum
length may lead to erroneous operation.
Do not start operation until the refrigerant is charged completely. The compressor will
fail if it is operated before the refrigerant piping charging is complete.
One-touch bush
(accessories)
One-touch bush
(accessories)
NOTES : Please ensure that the power supply cable and connection cables are not
installed through the same cable bush hole opening. They must be installed into
the two separate hole openings to prevent damage to the cable.
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6.3. Wiring method
7. PIPE INSTALLATION-2
WARNING
CAUTION
When connecting the power supply cable, make sure that the phase of the power
supply matches with the phase of the terminal board. If the phases do not match, the
compressor will rotate in reverse and will not be able to compress.
Install the insulated pipes so that they do not touch the compressor.
7.1. Installing insulation
6.3.1. Connection diagrams
Power supply
EARTH
(GROUND)
Power line
• Install insulation material after conducting “5.4. Sealing test”.
• To prevent condensation and water droplets, install insulation material on the refrigerant
pipe. (Fig. A)
• Refer to the table to determine the thickness of the insulation material.
• Use insulation with heat resistance above 120 °C.
Selection of insulation
(Use an insulation material with equal heat transmission rate or below 0.040
W/(m·k))
Insulation material minimum thickness (mm)
EARTH
(GROUND)
Outdoor unit
side terminal
Indoor unit
side terminal
6.3.2. Cable preparation
• Keep the earth (ground) wire longer than the other wires.
30 mm
Power supply cable or
Connection cable
Earth (ground)
wire
35 mm
Relative humidity
Pipe diameter
(mm)
≤ 70%
≤ 75%
≤ 80%
≤ 85%
6.35
8
10
13
17
9.52
9
11
14
18
12.70
10
12
15
19
15.88
10
12
16
20
19.05
10
13
16
21
22.22
11
13
17
22
25.40
11
13
17
22
* When the ambient temperature and relative humidity exceed 32 °C (DB) and 85%
respectively, please strengthen the heat insulation of refrigerant pipe.
7.2. Protection for the intrusion of small animals
(30 model only)
6.3.3. Wiring procedure
(1) Connect the power supply cable and the connection cable to terminal.
(2) Fasten the power supply cable and connection cable with cable clamp.
Terminal blocks
WARNING
Remove the gap of the power supply cable and connection cable inlet. If small animals
such as insects enter the external unit, a short circuit may be caused near electrical
components in the service panel.
1. Remove the cover plate.
Cable clamp
Firmly secure
cable clamp so
wire terminations
will not receive
external stress.
Cable clamp
Use the specified
wire type and connect it securely.
Insulation (seal)
Cover plate
Connection cable
EARTH
(GROUND)
Power supply cable
Indoor
unit
2. Fix the power supply cable and connection cable with the cable clip of the base of the
valves.
■ 36/45 model
Secure the cables using the cable ties attached to the base of the valves.
Cable clip
Power supply cable and
connection cable
Cable tie
Cable tie
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3. Attach the cover plate.
8. DEMAND CONTROL (option)
WARNING
Do not turn on the power until all work has been completed. Turning on the power
before the work is completed can cause serious accidents such as electric shock or
fire.
Ensure that any electrical installation is completed by a qualified person.
Ensure the electrical installation is installed in accordance with AS/NZS 3000.
8.1. Preparation for installation
Cover plate
CAUTION
Fix cables so that cables do not make contact with the pipes (especially on high pressure
side).
Do not make power supply cable and connection cable come in contact with valve (Gas).
Gap
Power supply cable
and connection cable
Items to be prepared:
• Demand control option PCB kit: optional parts
• Signal transmission cable (field supply) : for demand control signal transmission
Double insulated (cable size: 0.5–1.5 mm2)
NOTES: Use cable conformed to AS/NZS 5000.2.
Accessories that differ with each model
Accessories
30 model
○
Option PCB holder
Connector cable (2 cores)
Not used
○
Not used
○
○
○
Connector cable (small core)
Tapping screw (large)
Tapping screw (small)
Valve
(Gas)
36/45 model
Spacer
Not used
One-touch bush
Not used
Not used
Not used
Not used
○
○
*All other accessories are used in all models.
##
7.3. Filling with putty (36/45 model only)
WARNING
Fill the piping holes and wiring holes with putty (locally purchased) to avoid any gap
(Fig. A). If small animals such as insects enter the external unit, a short circuit may be
caused near electrical components in the service panel.
NOTES: Remove and replace the service and valve cover as in “5.1. Opening/Closing the
service cover”.
8.2. Installation work
8.2.1. Connecting the demand control option (30 model)
(1) Attach the demand control option PCB to the option PCB holder.
• If the outdoor unit is installed at a level that is higher than the indoor unit, the water
that has condensed in the 3-way valve of the outdoor unit could travel to the indoor
unit. Therefore, use putty in the space between the pipe and the insulation to prevent
the entry of water to the indoor units.
Fig. A
Insulation
Putty
Press the latching projection to downward, and
attach the demand option PCB.
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(2) Attach the demand control option PCB with holder by securing the screw.
(4) Fix the EMI core of the connector cable to the cable shown as [A] with the cable tie
(large).
Cable tie (large)
Tapping screw (large)
(5) Pass the signal transmission cable as shown in the figure.
Tapping screw (small)
Signal transmission cable
Connect the earth (ground) wire.
(6) Connect the signal transmission cable (field-supplied) to the demand control signal
terminal block.
20
(mm)
15
NOTES: Confirm that each wires of the signal
transmission cable are firmly connected to
corresponding terminal of the terminal block
to the demand control signal terminal block.
NOTES: Do not pinch the cables and cable ties with the option PCB holder.
(3) Connect the demand control option PCB and CND02 on the control board by using the
connector cable (small core).
CND02 (RED)
[A]
1
2
3
C
: DRM 1
: DRM 2
: DRM 3
: COMMON
㪈
㪉
㪊
㪚
(7) Put the cable tie with clip into the holes on the spacer.
Cable tie with clip
RED
(8) Fix the signal transmission cable with the cable tie (with clip).
Then cut off the redundant end of the cable tie (with clip).
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(9) Secure the EMI core to the signal transmission cable by using the cable tie (small).
1
2
3
(7) Connect the signal transmission cable (field-supplied)
to the demand control signal terminal block.
C
NOTES: Confirm that each wires of the signal
transmission cable are firmly connected to
corresponding terminal of the terminal block.
1 : DRM 1
2 : DRM 2
3 : DRM 3
C : COMMON
Cable-tie (small)
15
0 - 10
20
(mm)
(mm)
EMI core
(8) Fix the EMI core to the signal
transmission cable with the cable tie
(small).
㻝
(10) Attach the Insulation to the EMI core.
㻞
㻟
(9) Attach the Insulation to the EMI
core.
㻯
(10) Fix the signal transmission cable
with the cable clip.
(mm)
30 - 35
Cable tie
(small)
Do not route the signal
transmission cable overlapping
with the power supply cable.
Then wire the cable to the
outside of the outdoor unit.
(11) After you complete the wiring,
reinstall the protective cover and
the service cover firmly.
Insulation
Signal transmission cable
Attach the one-touch bush to
the knockout hole.
8.2.2. Connecting the demand control option (36/45 model)
(1) Remove the inverter cover of the main
unit board.
Service cover
Inverter cover
(2) Attach spacers (in 4 places) to the
demand control option PCB.
8.3. Additional instructions
CAUTION
Route the signal transmission cable away from the power supply cable.
Adjacent wiring of those cables may lead the product malfunctions caused by
generated noise.
• When testing the operation of the demand control modes, ensure the air conditioner
and optional PCB has been installed in accordance with the provided installation
manuals.
1 2 3 C
GOOD
PROHIBITED
(3) Fix the demand control option PCB with four
spacers attached to the holes on the bracket so
that the demand control signal terminal block
comes underneath.
(4) Connect the earth (ground) wire of the demand
control option PCB.
CN14
(5) Connect the demand control option PCB
and CN14 on the control board by using the
connector cable (2 Cores).
Attach the Insulation to the EMI core.
(6) Secure the earth (ground) wire and the
connector cable with the cable tie (large).
Then cut off the redundant end of the cable tie.
NOTES: Confirm that the connector cable
is firmly connected to the demand
control option PCB and the control
board.
• Enquiries when testing the operation of the demand control option PCB:
Consult Fujitsu Customer Service and your energy provider if you have any
operational issues or errors are caused.
9. HOW TO OPERATE THE DISPLAY UNIT
(36/45 model only)
9.1. Display unit position
WARNING
Never touch electrical co mponents such as the terminal blocks except the button on
the display board. It may cause a serious accident such as electric shock.
CAUTION
Once refrigerant charging is completed, be sure to open the valve prior to performing
the local settings. Otherwise, the compressor may fail.
Discharge any static electricity from your body before touching the push buttons.
Never touch any terminal or pattern of any parts on the control board.
CAUTION
Do not directly press or apply any pressure to the demand control option PCB.
Application of pressure may cause damage or fault of the board.
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• The positions of the buttons on the outdoor unit control board are shown in the
following figures.
Function or operation method
Display lamp
• Various settings can be adjusted by changing push buttons on the board of the outdoor
unit.
LED display
(1) POWER / MODE
Green
(2) ERROR
Red
(3) PUMP DOWN
Lights on while power on. Local setting in outdoor unit or error code is displayed with blink.
Blinks during abnormal air conditioner
operation.
Lights on during pump down operation.
Orange
(L1)
Lights on during Low noise mode when local
(4) LOW NOISE
setting is activated. (Lighting pattern of L2 and
Orange
(L2, L3)
L3 indicates low noise level)
*Refer to page 14.
Lights on during Peak cut mode when local
(5) PEAK CUT
setting is activated. (Lighting pattern of L4, L5
Orange
(L4, L5, L6)
and L6 indicates peak cut level)
*Refer to page 14.
Push buttons
Function or operation method
Button
9.2. Description of display and buttons
MODE
SW2
SELECT
To switch between the individual “Local settings”
and the “Error code displays”.
SW3
ENTER
To fix the individual “Local settings” and the “Error
code displays”.
• The printed characters for the LED display are as follows.
LED display part
To switch between “Local setting” and “Error code
display”.
SW1
SW4
EXIT
SW5
PUMP DOWN
To return to “Operation status displays.”
To start the pump down operation.
10. FIELD SETTING (36/45 model only)
Button part
CAUTION
Discharge the static electricity from your body before setting up the switches.
Never touch the terminals or the patterns on the parts that are mounted on the board.
10.1. Field setting buttons
Refer to “9.2. Description of display and buttons” for details.
10.2. Function settings
• Various functions can be set. Follow the setting method described in 10.2.1. and 10.2.2. to set as per the requirement.
Perform these settings after the indoor unit stops.
Settings List
LED display
No
Setting Item
POWER/
MODE
PUMP
ERROR
DOWN
(L1)
LOW NOISE
(L2)
(L3)
Factory
PEAK CUT
(L4)
(L5)
Content
setting
(L6)
By using the “Low noise mode”, the limit of the
Level 1
1
Blink
(9 times)
○
○
○
●
○
○
●
noise level will be set to decrease the noise
level. The mode comes in 2 levels which can
be set accordingly.
To turn on the mode, use the external input
Low noise
terminal (CN10).
mode setting
*By using this mode, the cooling/heating
Level 2
Blink
(9 times)
○
○
○
●
○
●
○
performance may decrease.
*Depending on the operating condition, the
noise level may not decrease even if the Low
noise mode is on.
2
Sign “
Peak cut
mode setting
Level 1
Blink
(9 times)
○
○
●
○
○
○
●
Level 2
Blink
(9 times)
○
○
●
○
○
●
○
Level 3
Blink
(9 times)
○
○
●
○
○
●
●
Level 4
Blink
(9 times)
○
○
●
○
●
○
○
○”: Lights off, “●”: Lights on
The capacity limit can be selected when
operating with the Peak cut mode. The
operation selection can be done by external
input terminal(CN11).
The lower the level, the more the effect of
energy saving, but the cooling/heating performance decreases.
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(4) Press [ENTER] button (SW3).
10.2.1. Setting for Low noise mode
(1) Switch to “Local setting mode” by pressing [MODE] button (SW1) for 3 seconds or
more.
(2) Confirm (POWER / MODE) blinks 9 times, and press [ENTER] button (SW3).
POWER/
MODE
PUMP
ERROR
○
Blink
(9 times)
Sign “ ”: Lights off, “
○
LOW NOISE
DOWN
(L1)
(L2)
○
●
○
(L3)
○
PEAK CUT
PEAK CUT
(L4)
○
(L5)
○
LOW NOISE
(L6)
○
MODE
Sign “ ”: Lights off, “
○
○
●
○
●”: Lights on
PEAK CUT
”: Lights on, () : Number of blinking
(L4)
LOW NOISE
MODE
Sign “ ”: Lights off
(L3)
(5) Press [SELECT] button (SW2), and adjust LED display as shown in below figure.
(3) Press [SELECT] button (SW2), and adjust LED display as shown below. (Current
setting is displayed)
LOW NOISE
(L2)
(L2)
(L3)
○
Blink
Sign “
Level 1
0% of rated input ratio
Level 2
50% of rated input ratio
Level 3
75% of rated input ratio
○
○
○
Level 4
100% of rated input ratio
Blink
○”: Lights off
(L4)
(L2)
(L3)
○
●
MODE
Sign “○”: Lights off, “●”: Lights on
LOW NOISE
(L4)
(L5)
○
○
Level 2
”: Lights off
(L6)
○
Blink
○
Blink
Blink
○
○
50% of rated input ratio
Level 3
75% of rated input ratio
Level 4
Sign “ ”: Lights off, “
100% of rated input ratio
”: Lights on
(L4)
○
○
●
●
(L5)
○
●
●
○
(L6)
●
○
●
○
(7) Return to “Operating status displays” (normal operation) by pressing [EXIT] button
(SW4).
CAUTION
Do not route the connection cable overlapping with the power supply cable.
PEAK CUT
Level 2
”: Lights off, “
Level 2
○
○
○
■ 36/45 model
(6) Press [ENTER] button (SW3) and fix it.
Level 1
0% of rated input ratio
11. EXTERNAL INPUT AND OUTPUT
○
Blink
The noise of Level 2 is lower than the one of Level 1.
○
Blink
• When pressed number is lost during operation, restart from the beginning of
operation procedure after returning to “Operation status displays” (normal operation)
by pressing the [EXIT] button once.
PEAK CUT
Level 1
Level 1
○
(5) Press [SELECT] button (SW2), and adjust LED display as shown in below figure.
Sign “
(L6)
Blink
PEAK CUT
LOW NOISE
○
○
(6) Press [ENTER] button (SW3) and fix it.
(4) Press [ENTER] button (SW3).
Sign “
(L5)
Remove the Inverter cover before work.
(L5)
(L6)
●
○
○
●”: Lights on
●
CN13 (Blue)
(7) Return to “Operating status displays” (normal operation) by pressing [EXIT] button
(SW4).
• In case of missing how many times [SELECT] and [ENTER] buttons are pressed,
restart from the beginning of operation procedure after returning to “Operation status
displays” (normal operation) by pressing the [EXIT] button (SW4) once.
CN12 (Black)
CN10 (Yellow)
CN11 (Green)
Fix the connection cable with other wires.
10.2.2. Setting for Peak cut mode
(1) Switch to “Local setting mode” by pressing [MODE] button (SW1) for 3 seconds or
more.
(2) Confirm (POWER / MODE) blinks 9 times, and press [ENTER] button (SW3).
POWER/
MODE
PUMP
ERROR
○
PEAK CUT
(L2)
(L3)
(L4)
(L5)
(L6)
○
○
○
○
○
○
Blink
(9 times)
Sign “ ”: Lights off, “
○
LOW NOISE
DOWN
(L1)
●”: Lights on, () : Number of blinking
Let the connection cable pass in the knock out hole.
To protect the wiring after opening a knock out hole,
remove any burrs from edge of the hole.
Be sure to install the Inverter cover after the wiring
complete.
(3) Press [SELECT] button (SW2), and adjust LED display as shown below. (Current
setting is displayed)
LOW NOISE
PEAK CUT
MODE
Sign “ ”: Lights off
○
(L2)
(L3)
Blink
○
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11.1. External input
11.2. External output
11.1.1. Wiring of connector
11.2.1. Wiring of connector
On/Off of the “Low noise mode” and “Peak cut mode” functions can be enabled with an
When installing connection cable, specified part (optional parts) must be used.
external field device.
When installing connection cable, specified part (optional parts) must be used.
Refer to the “Settings List” in “10.2. Function settings” for the required function. The
function must be set for the external input to work.
Input
Connector
Low noise mode
CN10
Peak cut mode
CN11
*M
ake the distance from the PC board to the connected unit within 10m (33ft).
• Contact capacity : 24VDC or more, 10mA or more.
Circuit diagram example
Connected unit
(Locally purchased)
Outdoor unit control
PC board
Output
Connector
Error status
CN12
Compressor status
CN13
* Make the distance from the PC board to the connected unit within 10m (33ft).
1) P
ower supply
• Voltage (Chart sign=Vcc) : DC 24V or less
2) L
oad
• Load : DC 500mA or less is recommended
Circuit diagram example
Outdoor unit control
PC board
Connection
cable
Connected unit
(Locally purchased)
Connector
Power
supply
Ex.) Switch
Load
Connection cable (option)
*10m (33ft)
*10m (33ft)
Signal
Connector
11.1.2. Low noise mode (CN10)
• This features reduces the operating sound of the outdoor unit from the normal sound.
The air conditioner is set to Low noise mode when closing the contact input of a
commercial timer or On/Off switch to a connector on the outdoor control PC board.
* Performance may drop depending on the outside air temperature condition, etc.
* Set the “Low noise mode” level, refer to “10.2. Function settings”.
Input Signal ···On : Low noise mode
Signal
11.2.2. Error status output (CN12)
An air conditioner error status signal is produced when a malfunction occurs.
Error status
Error
Normal
Output signal
On
Off
···Off : Normal operation
Input Signal
On
Off
Low noise mode
On
Off
11.1.3. Peak cut mode (CN11)
• Operation that suppressed the current value can be performed by means of the
11.2.3. Compressor status output (CN13)
Compressor operation status signal is produced when the compressor is running.
Compressor status
Operation
Stop
Output signal
On
Off
connected unit. The air conditioner is set to the Peak cut mode by applying the contact
input of a commercial On/Off switch to a connector on the outdoor control PC board.
* Set the “Peak cut mode” level , refer to “10.2. Function settings”.
Input Signal ···On : Peak cut mode
···Off : Normal operation
Input Signal
On
Off
Peak cut mode
On
Off
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Setting method on outdoor unit board
12. TEST RUN
(1)
12.1. Pre-test run check items
urn on the power of the outdoor unit and enter standby mode.
T
“POWER/MODE” display lights on.
POWER/
Check items
Is the outdoor unit securely installed?
H
ave you performed gas leakage inspection?
(Connection joints of various pipes (flange connection, brazing))
Is the heat insulation done completely?
(Gas pipe, liquid pipe, drain hose extension on indoor unit side etc.)
Is the water discharging from drain without any problems?
Are the cables connected correctly?
Are the cables as per specifications?
Is the earth (ground) wire connected accurately?
Are there any obstacles blocking the suction gate, and outlet of
the indoor/outdoor units?
Have you filled the specified amount of refrigerant?
Are the stop valves of gas pipe and liquid pipe fully open?
Has the power been supplied to crankcase heater for more than 6 hours?
After checking that the above items are all in order, refer to "12.2. Test operation
method” to test the unit. If there are problems, adjust immediately and recheck.
12.2. Test operation method
12.2.1. Operation method (30 model)
CAUTION
Always turn on the power 12 hours prior to the start of the operation in order to ensure
compressor protection.
Make a TEST RUN in accordance with the installation instruction sheet for the indoor unit.
12.2.2. Operation method (36/45 model)
Be sure to configure test run settings only when the outdoor unit has stopped
operating.
MODE
●
Sign “
Test operation setting method (It can be performed in the following two ways)
•• Set with test operation setting (refer to the installation manual of indoor unit for further
details) available in the remote controller.
•• Cooling operation and Heating operation can be set using [SELECT] button (SW2)
and [ENTER] button (SW3) available on the board of display unit.
(Make sure to perform the first test operation with cooling operation.)
Set as per the following procedure.
○
DOWN
(L1)
○
○”: Lights off, “●”: Lights on
LOW NOISE
(L2)
○
(L3)
○
PEAK CUT
(L4)
○
(L5)
(L6)
○
○
(2) Press the [ENTER] button (SW3) for more than 3 seconds.
POWER/
MODE
Blink
Sign “
PUMP
ERROR
○
DOWN
(L1)
○
○”: Lights off, “●”: Lights on
LOW NOISE
(L2)
○
(L3)
Blink
PEAK CUT
(L4)
○
(L5)
(L6)
○
○
(3) Press the [SELECT] button (SW2), LED of the test run mode switched between
Cooling and Heating.
Cooling test mode
POWER/
MODE
Blink
Sign “
PUMP
ERROR
○
DOWN
(L1)
○
○”: Lights off, “●”: Lights on
LOW NOISE
(L2)
○
(L3)
Blink
PEAK CUT
(L4)
○
(L5)
(L6)
○
○
Heating test mode
POWER/
MODE
Blink
Sign “
PUMP
ERROR
○
DOWN
(L1)
○
○”: Lights off, “●”: Lights on
LOW NOISE
(L2)
Blink
(L3)
○
PEAK CUT
(L4)
○
(L5)
(L6)
○
○
(4) After confirming the operation mode, press [ENTER] button (SW3).
The display changes as follows, and the air conditioner starts operation.
Cooling test mode
POWER/
MODE
Blink
Sign “
•• Depending on the communication status between the indoor and outdoor units,
it may take several minutes for the system to start operating after settings for the
test run are complete.
•• After the test run settings are complete, the outdoor units and the connected
indoor units will start operating. Room temperature control will not activate during
test operation (continuous operation).
•• If a knocking sound can be heard in the liquid compression of the compressor,
stop the unit immediately and then energize the crank case heater for a sufficient
length of time before restarting the operation.
PUMP
ERROR
PUMP
ERROR
○
DOWN
(L1)
○
○”: Lights off, “●”: Lights on
LOW NOISE
(L2)
○
(L3)
●
PEAK CUT
(L4)
○
(L5)
(L6)
○
○
Heating test mode
POWER/
MODE
Blink
Sign “
PUMP
ERROR
○
DOWN
(L1)
○
○”: Lights off, “●”: Lights on
LOW NOISE
(L2)
●
(L3)
○
PEAK CUT
(L4)
○
(L5)
(L6)
○
○
(5) Press [ENTER] button (SW3).
Air conditioner stops operation.
POWER/
MODE
●
Sign “
PUMP
ERROR
○
DOWN
(L1)
○
○”: Lights off, “●”: Lights on
LOW NOISE
(L2)
○
(L3)
○
PEAK CUT
(L4)
○
(L5)
(L6)
○
○
Checklist
LED display part
Check items during test operation.
Is the outdoor unit making any abnormal noise or vibrating significantly?
Is the cold air or hot air blowing from indoor unit according to the operation
mode?
Button part
Check that the “ERROR” LED blinks.
If, it has displayed, check the error content as per the “13.2 Error code check
table” described later.
O
perate the unit according to the operating manual provided with the indoor
unit, and check that it is operating normally.
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13. ERROR CODES (36/45 model only)
You can determine the operating status by the lighting on and blinking of the LED
display.
13.1. Error display mode
Display when an error occurs.
POWER/
MODE
PUMP
ERROR
LOW NOISE
DOWN
(L1)
(L2)
● (HiBlink
○
○
speed)
Sign “○”: Lights off, “●”: Lights on
LED display part
(L3)
○
PEAK CUT
(L4)
○
(L5)
(L6)
○
○
(1) Check that the “ERROR” LED blinks, then press the [Enter] button (SW3) once.
Button part
13.2. Error code check table
LED display
DESCRIPTION
REMARK
POWER/
PUMP
LOW NOISE
PEAK CUT
ERROR
DOWN
(L1)
(L2)
(L3)
(L4)
(L5)
(L6)
Blink
(2 times)
●
Blink
(1 time)
Blink
(1 time)
○
○
●
●
Serial forward transmission error during operation
Blink
(2 times)
●
Blink
(1 time)
Blink
(1 time)
●
Indoor unit capacity error
Blink
(2 times)
●
Blink
(2 times)
Blink
(2 times)
Indoor unit error
Indoor unit error
Blink
(2 times)
●
Blink
(5 times)
Blink
(15 times)
Outdoor unit main PCB error
Outdoor unit PCB model information error
Blink
(2 times)
●
Blink
(6 times)
Blink
(2 times)
○
○
○
○
○
○
○
○
Indoor unit capacity error
○
○
○
○
Inverter PCB error
Inverter error
Blink
(2 times)
●
Blink
(6 times)
Blink
(3 times)
○
○
○
●
IPM error
Trip terminal L error
Blink
(2 times)
●
Blink
(6 times)
Blink
(5 times)
○
○
●
●
Discharge temp. sensor error
Discharge temp. sensor 1 error
Blink
(2 times)
●
Blink
(7 times)
Blink
(1 time)
Compressor temp. sensor 1 error
Blink
(2 times)
●
Blink
(7 times)
Blink
(2 times)
○
○
Heat Ex. center temp. sensor error
Blink
(2 times)
●
Blink
(7 times)
Blink
(3 times)
●
○
Outdoor unit Heat Ex. liquid temp. sensor error
Blink
(2 times)
●
Blink
(7 times)
Blink
(3 times)
●
●
Outdoor temp. sensor error
Blink
(2 times)
●
Blink
(7 times)
Blink
(4 times)
Heat sink temp. sensor error
Heat sink temp. sensor error
●
Blink
(7 times)
Blink
(7 times)
Current sensor error
Current sensor 1 error (stoppage permanently)
Blink
(2 times)
●
Blink
(8 times)
Blink
(4 times)
High pressure switch 1 error
Blink
(2 times)
●
Blink
(8 times)
Blink
(6 times)
●
○
○
○
○
●
Blink
(2 times)
○
○
○
○
○
○
○
●
Compressor temp. sensor error
Pressure sensor error
Blink
(2 times)
●
Blink
(8 times)
Blink
(6 times)
●
●
Trip detection
Blink
(2 times)
●
Blink
(9 times)
Blink
(4 times)
Compressor motor control error
Rotor position detection error (stoppage permanently)
●
Blink
(9 times)
Blink
(5 times)
○
○
Outdoor unit fan motor 1 error
Duty abnormal
Blink
(2 times)
●
Blink
(9 times)
Blink
(7 times)
●
●
Outdoor unit fan motor 2 error
Duty abnormal
Blink
(2 times)
●
Blink
(9 times)
Blink
(8 times)
●
●
4-way valve error
4-way valve error
Blink
(2 times)
●
Blink
(9 times)
Blink
(9 times)
Discharge temp. 1 error
Blink
(2 times)
●
Blink
(10 times)
Blink
(1 time)
Compressor 1 temp. error
Blink
(2 times)
●
Blink
(10 times)
Blink
(3 times)
Low pressure error
Blink
(2 times)
●
Blink
(10 times)
Blink
(5 times)
○
○
○
○
●
Discharge temp. 1 error
○
○
○
○
○
○
○
○
●
Blink
(2 times)
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
○
MODE
Serial forward transmission error immediately after
Serial communication error
operation
Outdoor unit Heat Ex. sensor error
Outdoor temp. sensor error
Pressure sensor error
Trip detection
Compressor temp. error
Pressure error 2
Sign “
●
●
●
●
●
●
○
○
●
●
●
●
○”: Lights off, “●”: Lights on
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14.1.2. Pump down procedure (36/45 model)
14. PUMP DOWN
WARNING
• Operate [PUMP DOWN] button (SW5) on the display board with the following
procedure.
Never touch electrical components such as the terminal blocks except the button on
the display board. It may cause a serious accident such as electric shock.
During the pump down operation, make sure that the compressor is turned off before
you remove the refrigerant piping.
Do not remove the connection pipe while the compressor is in operation with 2-way or
3-way valve open. This may cause abnormal pressure in the refrigeration cycle that
leads to breakage and even injury.
CAUTION
Perform the pump down operation before disconnecting any refrigerant pipe or electric
cable.
Collect refrigerant from the service port or the 3-way valve if pump down cannot be
performed.
In case of a group control system installation, do not turn the power off until the pump
down is completed in all outdoor units.
(Group control system installation described in “SPECIAL INSTALLATION METHODS”
in the installation manual of the indoor unit.)
Please check the refrigerant circuit for any leaks before starting the pump down
operation.
Do not proceed with the pump down operation if there is no refrigerant left in the circuit
due to bent or broken piping.
14.1. Pump down procedure
14.1.1. Pump down procedure (30 model)
LED display part
Perform the following procedures to collect the refrigerant when moving the indoor unit or
the outdoor unit.
(1)
(2)
(3)
(4)
Confirm that the power is off, and then open the service panel.
Close the 3-way valve (Liquid).
Turn the power on.
Press the push-button switch on the circuit board once.
The LED on the circuit board starts lighting. This indicates the start of pump down
operation.
(5) Pump down operation continues for about 1 minute.
Then close the 3-way valve (Gas) immediately.
The compressor stops automatically.
(6) Turn the power off.
Button part
(1) Confirm that the power is off, and then open the service panel.
(2) Check the 3-way valves (both the liquid side and gas side) are opened.
(3) Turn the power on.
POWER/
PUMP DOWN SW
MODE
PUMP
ERROR
DOWN
(L1)
LOW NOISE
(L2)
●
○
○
○
Sign “○”: Lights off, “●”: Lights on
(L3)
○
PEAK CUT
(L4)
○
(L5)
(L6)
○
○
(4) Press [PUMP DOWN] button (SW5) for 3 seconds or more after 3 minutes after
power on.
POWER/
MODE
PUMP
ERROR
DOWN
(L1)
LOW NOISE
(L2)
●
○
●
○
Sign “○”: Lights off, “●”: Lights on
(L3)
○
PEAK CUT
(L4)
●
(L5)
(L6)
●
●
LED display lights on as shown in the above table, and the fans and the
compressor start operating.
• If the [PUMP DOWN] button (SW5) is pressed while the compressor is operating,
the compressor will stop, then start again in about 3 minutes.
(5) LED display will change as shown below about 3 minutes after the compressor
starts. Fully close the 3-way valve on the liquid pipe side at this stage.
POWER/
MODE
PUMP
ERROR
DOWN
(L1)
LOW NOISE
(L2)
●
○
●
○
Sign “○”: Lights off, “●”: Lights on
(L3)
○
PEAK CUT
(L4)
○
(L5)
●
(L6)
●
• If the valve on the liquid pipe side is not closed, the pump down cannot be performed.
WARNING
This part (Choke coil) generates high voltages. Never touch this part.
Never touch electrical components such as the terminal blocks except the button on
the display board. It may cause a serious accident such as electric shock.
During the pump down operation, make sure that the compressor is turned off before
you remove the refrigerant piping.
Do not remove the connection pipe while the compressor is in operation with 3-way
valve open. This may cause abnormal pressure in the refrigeration cycle that leads to
breakage and even injury.
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(6) When LED display changes as shown in the following table, close the 3-way valve
on the gas pipe side tightly.
POWER/
MODE
PUMP
ERROR
DOWN
(L1)
LOW NOISE
(L2)
●
○
●
○
Sign “○”: Lights off, “●”: Lights on
(L3)
○
PEAK CUT
(L4)
(L5)
○
○
(L6)
●
• If the valve on the gas pipe side is not closed, refrigerant may flow into the piping
after the compressor stops.
Step (6)
Step (5)
Closing direction Closing direction
Hexagon wrench
Liquid pipe
Gas pipe
(7) LED display changes after 1 minute as shown in the table.
POWER/
MODE
PUMP
ERROR
DOWN
(L1)
LOW NOISE
(L2)
●
○
●
○
Sign “○”: Lights off, “●”: Lights on
(L3)
○
PEAK CUT
(L4)
(L5)
○
○
(L6)
○
Fans and compressor stop automatically.
• If the pump down is successfully completed (the above LED display is shown), the
outdoor unit remains stopped until the power is turned off.
(8) Turn the power off.
POWER/
MODE
PUMP
ERROR
○
○
Sign “○”: Lights off
DOWN
(L1)
○
LOW NOISE
(L2)
○
(L3)
○
PEAK CUT
(L4)
○
(L5)
○
(L6)
○
Pump down is completed.
NOTES:
• To stop pump down, press the [PUMP DOWN] button (SW5) again.
• To start the pump down again after the compressor is automatically stopped due
to an error, turn the power off and open the 3-way valves. Wait 3 minutes, turn the
power on and start the pump down again.
• When starting the operation after completion of the pump down, turn the power off,
and then open the 3-way valves. Wait 3 minutes, turn the power on and perform a
test run in Cooling operation mode.
• If an error occurs, recover the refrigerant from service port.
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