ii
HWE08110 GB
Safety Precautions
Before installing the unit, thoroughly read the following safety precautions.
Observe these safety precautions for your safety.
WARNING
This symbol is intended to alert the user to the presence of important instructions that must be followed to avoid
the risk of serious injury or death.
CAUTION
This symbol is intended to alert the user to the presence of important instructions that must be followed to avoid
the risk of serious injury or damage to the unit.
After reading this manual, give it to the user to retain for future reference.
Keep this manual for easy reference. When the unit is moved or repaired, give this manual to those who provide these
services.
When the user changes, make sure that the new user receives this manual.
WARNING
Ask your dealer or a qualified technician to install the
unit.
Improper installation by the user may result in water leakage, electric shock, smoke, and/or fire.
Properly install the unit on a surface that can withstand the weight of the unit.
Unit installed on an unstable surface may fall and cause injury.
Only use specified cables. Securely connect each cable so that the terminals do not carry the weight of the
cable.
Improperly connected or fixed cables may produce heat
and start a fire.
Take appropriate safety measures against strong
winds and earthquakes to prevent the unit from falling.
If the unit is not installed properly, the unit may fall and
cause serious injury to the person or damage to the unit.
Do not make any modifications or alterations to the
unit. Consult your dealer for repair.
Improper repair may result in water leakage, electric shock,
smoke, and/or fire.
Do not touch the heat exchanger fins.
The fins are sharp and dangerous.
In the event of a refrigerant leak, thoroughly ventilate
the room.
If refrigerant gas leaks and comes in contact with an open
flame, poisonous gases will be produced.
When installing the All-Fresh type units, take it into
consideration that the outside air may be discharged
directly into the room when the thermo is turned off.
Direct exposure to outdoor air may have an adverse effect
on health. It may also result in food spoilage.
Properly install the unit according to the instructions
in the installation manual.
Improper installation may result in water leakage, electric
shock, smoke, and/or fire.
Have all electrical work performed by an authorized
electrician according to the local regulations and instructions in this manual, and a dedicated circuit must
be used.
Insufficient capacity of the power supply circuit or improper
installation may result in malfunctions of the unit, electric
shock, smoke, and/or fire.
ii
HWE08110 GB
WARNING
Securely attach the terminal block cover (panel) to the
unit.
If the terminal block cover (panel) is not installed properly,
dust and/or water may infiltrate and pose a risk of electric
shock, smoke, and/or fire.
Only use the type of refrigerant that is indicated on the
unit when installing or reinstalling the unit.
Infiltration of any other type of refrigerant or air into the unit
may adversely affect the refrigerant cycle and may cause
the pipes to burst or explode.
When installing the unit in a small room, exercise caution and take measures against leaked refrigerant
reaching the limiting concentration.
Consult your dealer with any questions regarding limiting
concentrations and for precautionary measures before installing the unit. Leaked refrigerant gas exceeding the limiting concentration causes oxygen deficiency.
Consult your dealer or a specialist when moving or reinstalling the unit.
Improper installation may result in water leakage, electric
shock, and/or fire.
After completing the service work, check for a gas
leak.
If leaked refrigerant is exposed to a heat source, such as a
fan heater, stove, or electric grill, poisonous gases may be
produced.
Do not try to defeat the safety features of the unit.
Forced operation of the pressure switch or the temperature
switch by defeating the safety features of these devices, or
the use of accessories other than the ones that are recommended by MITSUBISHI may result in smoke, fire, and/or
explosion.
Only use accessories recommended by MITSUBISHI.
Ask a qualified technician to install the unit. Improper installation by the user may result in water leakage, electric
shock, smoke, and/or fire.
Control box houses high-voltage parts.
When opening or closing the front panel of the control box,
do not let it come into contact with any of the internal components. Before inspecting the inside of the control box,
turn off the power, keep the unit off for at least 10 minutes,
and confirm that the voltage at both ends of the main capacitor (C1) has dropped to 20VDC or below. (It takes
about 10 minutes to discharge electricity after the power
supply is turned off.)
iiiiii
HWE08110 GB
Precautions for handling units for use with R410A
CAUTION
Do not use the existing refrigerant piping.
A large amount of chlorine that may be contained in the re-
sidual refrigerant and refrigerating machine oil in the existing piping may cause the refrigerating machine oil in the
new unit to deteriorate.
R410A is a high-pressure refrigerant and can cause the
existing pipes to burst.
Use refrigerant pipes made of phosphorus deoxidized
copper. Keep the inner and outer surfaces of the pipes
clean and free of such contaminants as sulfur, oxides,
dust, dirt, shaving particles, oil, and water.
These types of contaminants inside the refrigerant pipes
may cause the refrigerant oil to deteriorate.
Store the pipes to be installed indoors, and keep both
ends of the pipes sealed until immediately before brazing. (Keep elbows and other joints wrapped in plastic.)
Infiltration of dust, dirt, or water into the refrigerant system
may cause the refrigerating machine oil to deteriorate or
cause the unit to malfunction.
Use a small amount of ester oil, ether oil, or alkylbenzene to coat flares and flanges.
Infiltration of a large amount of mineral oil may cause the refrigerating machine oil to deteriorate.
Charge liquid refrigerant (as opposed to gaseous refrigerant) into the system.
If gaseous refrigerant is charged into the system, the composition of the refrigerant in the cylinder will change and
may result in performance loss.
Use a vacuum pump with a reverse-flow check valve.
If a vacuum pump that is not equipped with a reverse-flow
check valve is used, the vacuum pump oil may flow into the
refrigerant cycle and cause the refrigerating machine oil to
deteriorate.
Prepare tools for exclusive use with R410A. Do not use
the following tools if they have been used with the conventional refrigerant (gauge manifold, charging hose,
gas leak detector, reverse-flow check valve, refrigerant
charge base, vacuum gauge, and refrigerant recovery
equipment.).
If the refrigerant or the refrigerating machine oil left on
these tools are mixed in with R410A, it may cause the refrigerating machine oil to deteriorate.
Infiltration of water may cause the refrigerating machine
oil to deteriorate.
Gas leak detectors for conventional refrigerants will not
detect an R410A leak because R410A is free of chlorine.
Do not use a charging cylinder.
If a charging cylinder is used, the composition of the refrigerant will change, and the unit may experience power loss.
Exercise special care when handling the tools for use
with R410A.
Infiltration of dust, dirt, or water into the refrigerant system
may cause the refrigerating machine oil to deteriorate.
Only use refrigerant R410A.
The use of other types of refrigerant that contain chlorine
(i.e. R22) may cause the refrigerating machine oil to deteriorate.
iv
HWE08110 GB
Before installing the unit
WARNING
Do not install the unit where a gas leak may occur.
If gaseous refrigerant leaks and piles up around the unit, it
may be ignited.
Do not use the unit to keep food items, animals, plants,
artifacts, or for other special purposes.
The unit is not designed to preserve food products.
Do not use the unit in an unusual environment.
Do not install the unit where a large amount of oil or steam
is present or where acidic or alkaline solutions or chemical
sprays are used frequently. Doing so may lead to a remarkable drop in performance, electric shock, malfunctions, smoke, and/or fire.
The presence of organic solvents or corrosive gas (i.e.
ammonia, sulfur compounds, and acid) may cause gas
leakage or water leakage.
When installing the unit in a hospital, take appropriate
measures to reduce noise interference.
High-frequency medical equipment may interfere with the
normal operation of the air conditioner or vice versa.
Do not install the unit on or over things that cannot get
wet.
When the humidity level exceeds 80% or if the drainage
system is clogged, the indoor unit may drip water. Drain water is also discharged from the outdoor unit. Install a centralized drainage system if necessary.
vv
HWE08110 GB
Before installing the unit (moving and reinstalling the unit) and performing
electrical work
CAUTION
Properly ground the unit.
Do not connect the grounding wire to a gas pipe, water pipe,
lightning rod, or grounding wire from a telephone pole. Improper grounding may result in electric shock, smoke, fire,
and/or malfunction due to noise interference.
Do not put tension on the power supply wires.
If tension is put on the wires, they may break and result in
excessive heat, smoke, and/or fire.
Install an earth leakage breaker to avoid the risk of
electric shock.
Failure to install an earth leakage breaker may result in
electric shock, smoke, and/or fire.
Use the kind of power supply wires that are specified
in the installation manual.
The use of wrong kind of power supply wires may result in
current leak, electric shock, and/or fire.
Use breakers and fuses (current breaker, remote
switch <switch + Type-B fuse>, moulded case circuit
breaker) with the proper current capacity.
The use of wrong capacity fuses, steel wires, or copper
wires may result in malfunctions, smoke, and/or fire.
Do not spray water on the air conditioner or immerse
the air conditioner in water.
Otherwise, electric shock and/or fire may result.
When handling units, always wear protective gloves to
protect your hands from metal parts and high-temperature parts.
Periodically check the installation base for damage.
If the unit is left on a damaged platform, it may fall and
cause injury.
Properly install the drain pipes according to the instructions in the installation manual. Keep them insulated to avoid dew condensation.
Improper plumbing work may result in water leakage and
damage to the furnishings.
Exercise caution when transporting products.
Products weighing more than 20 kg should not be carried
alone.
Do not carry the product by the PP bands that are used on
some products.
Do not touch the heat exchanger fins. They are sharp and
dangerous.
When lifting the unit with a crane, secure all four corners
to prevent the unit from falling.
Properly dispose of the packing materials.
Nails and wood pieces in the package may pose a risk of
injury.
Plastic bags may pose a risk of choking hazard to chil-
dren. Tear plastic bags into pieces before disposing of
them.
vi
HWE08110 GB
Before the test run
CAUTION
Turn on the unit at least 12 hours before the test run.
Keep the unit turned on throughout the season. If the unit is
turned off in the middle of a season, it may result in malfunctions.
To avoid the risk of electric shock or malfunction of the
unit, do not operate switches with wet hands.
Do not touch the refrigerant pipes with bare hands during and immediately after operation.
During or immediately after operation, certain parts of the
unit such as pipes and compressor may be either very cold
or hot, depending on the state of the refrigerant in the unit
at the time. To reduce the risk of frost bites and burns, do
not touch these parts with bare hands.
Do not operate the unit without panels and safety
guards.
Rotating, high-temperature, or high-voltage parts on the unit
pose a risk of burns and/or electric shock.
Do not turn off the power immediately after stopping
the operation.
Keep the unit on for at least five minutes before turning off
the power to prevent water leakage or malfunction.
Do not operate the unit without the air filter.
Dust particles may build up in the system and cause malfunctions.
CONTENTS
HWE08110 GB
I
Read Before Servicing
[1] Read Before Servicing.............................................................................................................. 3
[2] Necessary Tools and Materials ................................................................................................ 4
[3] Piping Materials ........................................................................................................................ 5
[4] Storage of Piping ...................................................................................................................... 7
[5] Pipe Processing........................................................................................................................ 7
[6] Brazing...................................................................................................................................... 8
[7] Air Tightness Test..................................................................................................................... 9
[8] Vacuum Drying (Evacuation) ..................................................................................................10
[9] Refrigerant Charging .............................................................................................................. 11
[10] Remedies to be taken in case of a Refrigerant Leak............................................................ 11
[11] Characteristics of the Conventional and the New Refrigerants ............................................ 12
[12] Notes on Refrigerating Machine Oil ...................................................................................... 13
II
Restrictions
[1] System configuration .............................................................................................................. 17
[2] Types and Maximum allowable Length of Cables .................................................................. 18
[3] Switch Settings and Address Settings .................................................................................... 19
[4] Sample System Connection ................................................................................................... 25
[5] An Example of a System to which an MA Remote Controller is connected ........................... 26
[6] An Example of a System to which an ME Remote Controller is connected ........................... 36
[7] An Example of a System to which both MA Remote Controller and ME Remote
Controller are connected ........................................................................................................38
[8] Restrictions on Pipe Length.................................................................................................... 40
III
Outdoor Unit Components
[1] Outdoor Unit Components and Refrigerant Circuit ................................................................. 45
[2] Control Box of the Outdoor Unit.............................................................................................. 47
[3] Outdoor Unit Circuit Board...................................................................................................... 48
IV
Remote Controller
[1] Functions and Specifications of MA and ME Remote Controllers .......................................... 55
[2] Group Settings and Interlock Settings via the ME Remote Controller .................................... 56
[3] Interlock Settings via the MA Remote Controller .................................................................... 60
[4] Using the built-in Temperature Sensor on the Remote Controller .......................................... 61
V
Electrical Wiring Diagram
[1] Electrical Wiring Diagram of the Outdoor Unit ........................................................................ 65
[2] Electrical Wiring Diagram of Transmission Booster................................................................ 66
VI
Refrigerant Circuit
[1] Refrigerant Circuit Diagram .................................................................................................... 69
[2] Principal Parts and Functions ................................................................................................. 71
VII
Control
[1] Functions and Factory Settings of the Dipswitches ................................................................ 77
[2] Controlling the Outdoor Unit ................................................................................................... 83
[3] Operation Flow Chart.............................................................................................................. 94
VIII
Test Run Mode
[1] Items to be checked before a Test Run ................................................................................ 101
[2] Test Run Method .................................................................................................................. 102
[3] Operating Characteristic and Refrigerant Amount................................................................ 103
[4] Adjusting the Refrigerant Amount......................................................................................... 103
[5] Refrigerant Amount Adjust Mode.......................................................................................... 106
[6] The following symptoms are normal. .................................................................................... 108
[7] Standard Operation Data (Reference Data) ......................................................................... 109
IX
Troubleshooting
[1] Error Code Lists.................................................................................................................... 117
[2] Responding to Error Display on the Remote Controller........................................................ 120
[3] Investigation of Transmission Wave Shape/Noise ............................................................... 184
[4] Troubleshooting Principal Parts............................................................................................ 187
[5] Refrigerant Leak ................................................................................................................... 204
[6] Compressor Replacement Instructions................................................................................. 206
[7] Troubleshooting Using the Outdoor Unit LED Error Display................................................. 208
[8] Installation Instructions for the Control Box Snow Guard Accessories................................. 209
X
LED Monitor Display on the Outdoor Unit Board
[1] How to Read the LED on the Service Monitor ...................................................................... 213
HWE08110 GB
- 1 -
HWE08110 GB
I
Read Before Servicing
[1] Read Before Servicing ....................................................................................................... 3
[2] Necessary Tools and Materials.......................................................................................... 4
[3] Piping Materials ................................................................................................................. 5
[4] Storage of Piping ............................................................................................................... 7
[5] Pipe Processing................................................................................................................. 7
[6] Brazing............................................................................................................................... 8
[7] Air Tightness Test.............................................................................................................. 9
[8] Vacuum Drying (Evacuation) ........................................................................................... 10
[9] Refrigerant Charging........................................................................................................ 11
[10] Remedies to be taken in case of a Refrigerant Leak .......................................................11
[11] Characteristics of the Conventional and the New Refrigerants .......................................12
[12] Notes on Refrigerating Machine Oil ................................................................................. 13
- 2 -
[ I Read Before Servicing ]
- 3 -
HWE08110 GB
IRead Befo re Servicing
[1] Read Before Servicing
1. Check the type of refrigerant used in the system to be serviced.
Refrigerant Type
Mitsubishi Electric Air conditioner CITY MULTI ZUBADAN Series: R410A
2. Check the symptoms exhibited by the unit to be serviced.
Refer to this service handbook for symptoms relating to the refrigerant cycle.
3. Thoroughly read the safety precautions at the beginning of this manual.
4. Preparing necessary tools: Prepare a set of tools to be used exclusively with each type of refrigerant.
Refer to "Necessary Tools and Materials" for information on the use of tools.(page 4)
5. Verification of the connecting pipes: Verify the type of refrigerant used for the unit to be moved or replaced.
Use refrigerant pipes made of phosphorus deoxidized copper. Keep the inner and outer surfaces of the pipes clean and free
of such contaminants as sulfur, oxides, dust, dirt, shaving particles, oil, and water.
These types of contaminants inside the refrigerant pipes may cause the refrigerant oil to deteriorate.
6. If there is a leak of gaseous refrigerant and the remaining refrigerant is exposed to an open flame, a poisonous gas
hydrofluoric acid may form. Keep workplace well ventilated.
CAUTION
Install new pipes immediately after removing old ones to keep moisture out of the refrigerant circuit.
The use of refrigerant that contains chloride, such as R22, will cause the refrigerating machine oil to deteriorate.
[ I Read Before Servicing ]
- 4 -
HWE08110 GB
[2] Necessary Tools and Materials
Prepare the following tools and materials necessary for installing and servicing the unit.
Tools for use with R410A (Adaptability of tools that are for use with R22 or R407C)
1. To be used exclusively with R410A (not to be used if used with R22 or R407C)
2. Tools and materials that may be used with R410A with some restrictions
3. Tools and materials that are used with R22 or R407C that may also be used with R410A
4. Tools and materials that must not be used with R410A
Tools for R410A must be handled with special care to keep moisture and dust from infiltrating the cycle.
Tools/Materials Use Notes
Gauge Manifold Evacuation and refrigerant charging Higher than 5.09MPa[738psi] on the
high-pressure side
Charging Hose Evacuation and refrigerant charging The hose diameter is larger than the
conventional model.
Refrigerant Recovery Cylinder Refrigerant recovery
Refrigerant Cylinder Refrigerant charging The refrigerant type is indicated. The
cylinder is pink.
Charging Port on the Refrigerant Cylinder Refrigerant charging The charge port diameter is larger
than that of the current port.
Flare Nut Connection of the unit with the pipes Use Type-2 Flare nuts.
Tools/Materials Use Notes
Gas Leak Detector Gas leak detection The ones for use with HFC refrigerant
may be used.
Vacuum Pump Vacuum drying May be used if a check valve adapter
is attached.
Flare Tool Flare processing Flare processing dimensions for the
piping in the system using the new refrigerant differ from those of R22. Refer to next page.
Refrigerant Recovery Equipment Refrigerant recovery May be used if compatible with
R410A.
Tools/Materials Use Notes
Vacuum Pump with a Check Valve Vacuum drying
Bender Bending pipes
Torque Wrench Tightening flare nuts Only the flare processing dimensions
for pipes that have a diameter of
ø12.70 (1/2") and ø15.88 (5/8") have
been changed.
Pipe Cutter Cutting pipes
Welder and Nitrogen Cylinder Welding pipes
Refrigerant Charging Meter Refrigerant charging
Vacuum Gauge Vacuum level check
Tools/Materials Use Notes
Charging Cylinder Refrigerant charging Prohibited to use
[ I Read Before Servicing ]
- 5 -
HWE08110 GB
[3] Piping Materials
1. Copper pipe materials
The distinction between O-materials (Annealed) and 1/2H-materials (Drawn) is made based on the strength of the pipes them-
selves.
2. Types of copper pipes
3. Piping materials/Radial thickness
Use refrigerant pipes made of phosphorus deoxidized copper.
The operation pressure of the units that use R410A is higher than that of the units that use R22.
Use pipes that have at least the radial thickness specified in the chart below.
(Pipes with a radial thickness of 0.7 mm or less may not be used.)
The pipes in the system that uses the refrigerant currently on the market are made with O-material (Annealed), even if the
pipe diameter is less than ø19.05 (3/4"). For a system that uses R410A, use pipes that are made with 1/2H-material (Drawn)
unless the pipe diameter is at least ø19.05 (3/4") and the radial thickness is at least 1.2t.
The figures in the radial thickness column are based on the Japanese standards and provided only as a reference. Use pipes
that meet the local standards.
O-material (Annealed) Soft copper pipes (annealed copper pipes). They can easily be bent with hands.
1/2H-material (Drawn) Hard copper pipes (straight pipes). They are stronger than the O-material (Annealed)
at the same radial thickness.
Maximum working pressure Refrigerant type
3.45 MPa [500psi] R22, R407C etc.
4.30 MPa [624psi] R410A etc.
Pipe size (mm[in]) Radial thickness (mm) Material
ø6.35 [1/4"] 0.8t
O-material (Annealed)
ø9.52 [3/8"] 0.8t
ø12.7 [1/2"] 0.8t
ø15.88 [5/8"] 1.0t
ø19.05 [3/4"] 1.0t
1/2H-material,
H-material (Drawn)
ø22.2 [7/8"] 1.0t
ø25.4 [1"] 1.0t
ø28.58 [1-1/8"] 1.0t
ø31.75 [1-1/4"] 1.1t
ø34.93 [1-3/8"] 1.1t
ø41.28 [1-5/8"] 1.2t
Do not use the existing piping!
[ I Read Before Servicing ]
- 6 -
HWE08110 GB
4. Thickness and refrigerant type indicated on the piping materials
Ask the pipe manufacturer for the symbols indicated on the piping material for new refrigerant.
5. Flare processing (O-material (Annealed) and OL-material only)
The flare processing dimensions for the pipes that are used in the R410A system are larger than those in the R22 system.
If a clutch-type flare tool is used to flare the pipes in the system using R410A, the length of the pipes must be between 1.0
and 1.5 mm. For margin adjustment, a copper pipe gauge is necessary.
6. Flare nut
The flare nut type has been changed to increase the strength. The size of some of the flare nuts have also been changed.
The figures in the radial thickness column are based on the Japanese standards and provided only as a reference. Use pipes
that meet the local standards.
Flare processing dimensions (mm[in])
Pipe size (mm[in])
A dimension (mm)
R410A R22, R407C
ø6.35 [1/4"] 9.1 9.0
ø9.52 [3/8"] 13.2 13.0
ø12.7 [1/2"] 16.6 16.2
ø15.88 [5/8"] 19.7 19.4
ø19.05 [3/4"] 24.0 23.3
Flare nut dimensions (mm[in])
Pipe size (mm[in])
B dimension (mm)
R410A R22, R407C
ø6.35 [1/4"] 17.0 17.0
ø9.52 [3/8"] 22.0 22.0
ø12.7 [1/2"] 26.0 24.0
ø15.88 [5/8"] 29.0 27.0
ø19.05 [3/4"] 36.0 36.0
Dimension A
Dimension B
[ I Read Before Servicing ]
- 7 -
HWE08110 GB
[4] Storage of Piping
1. Storage location
Store the pipes to be used indoors. (Warehouse at site or owner's warehouse)
If they are left outdoors, dust, dirt, or moisture may infiltrate and contaminate the pipe.
2. Sealing the pipe ends
Both ends of the pipes should be sealed until just before brazing.
Keep elbow pipes and T-joints in plastic bags.
The new refrigerator oil is 10 times as hygroscopic as the conventional refrigerating machine oil (such as Suniso) and, if not
handled with care, could easily introduce moisture into the system. Keep moisture out of the pipes, for it will cause the oil to
deteriorate and cause a compressor failure.
[5] Pipe Processing
Use a small amount of ester oil, ether oil, or alkylbenzene to coat flares and flanges.
Use a minimum amount of oil.
Use only ester oil, ether oil, and alkylbenzene.
[ I Read Before Servicing ]
- 8 -
HWE08110 GB
[6] Brazing
No changes have been made in the brazing procedures. Perform brazing with special care to keep foreign objects (such as oxide
scale, water, and dust) out of the refrigerant system.
Example: Inside the brazed connection
1. Items to be strictly observed
Do not conduct refrigerant piping work outdoors if raining.
Use non-oxidized solder.
Use a brazing material (BCuP-3) that requires no flux when brazing between copper pipes or between a copper pipe and
copper coupling.
If installed refrigerant pipes are not immediately connected to the equipment, then braze and seal both ends.
2. Reasons
The new refrigerating machine oil is 10 times as hygroscopic as the conventional oil and is more likely to cause unit failure if
water infiltrates into the system.
Flux generally contains chloride. Residual flux in the refrigerant circuit will cause sludge to form.
3. Notes
Do not use commercially available antioxidants because they may cause the pipes to corrode or refrigerating machine oil to
deteriorate.
Use of oxidized solder for brazing Use of non-oxidized solder for brazing
[ I Read Before Servicing ]
- 9 -
HWE08110 GB
[7] Air Tightness Test
No changes have been made in the detection method. Note that a refrigerant leak detector for R22 will not detect an R410A leak.
1. Items to be strictly observed
Pressurize the equipment with nitrogen up to the design pressure (4.15MPa[601psi]), and then judge the equipment's air tight-
ness, taking temperature variations into account.
Refrigerant R410A must be charged in its liquid state (vs. gaseous state).
2. Reasons
Oxygen, if used for an air tightness test, poses a risk of explosion. (Only use nitrogen to check air tightness.)
Refrigerant R410A must be charged in its liquid state. If gaseous refrigerant in the cylinder is drawn out first, the composition
of the remaining refrigerant in the cylinder will change and become unsuitable for use.
3. Notes
Procure a leak detector that is specifically designed to detect an HFC leak. A leak detector for R22 will not detect an
HFC(R410A) leak.
Halide torch R22 leakage detector
[ I Read Before Servicing ]
- 10 -
HWE08110 GB
[8] Vacuum Drying (Evacuation)
1. Vacuum pump with a reverse-flow check valve (Photo1)
To prevent the vacuum pump oil from flowing into the refrigerant circuit during power OFF or power failure, use a vacuum
pump with a reverse-flow check valve.
A reverse-flow check valve may also be added to the vacuum pump currently in use.
2. Standard of vacuum degree (Photo 2)
Use a vacuum pump that attains 0.5Torr(65Pa) or lower degree of vacuum after 5 minutes of operation, and connect it directly
to the vacuum gauge. Use a pump well-maintained with an appropriate lubricant. A poorly maintained vacuum pump may not
be able to attain the desired degree of vacuum.
3. Required precision of vacuum gauge
Use a vacuum gauge that registers a vacuum degree of 5Torr(650Pa) and measures at intervals of 1Torr(130Pa). (A recommended vacuum gauge is shown in Photo2.)
Do not use a commonly used gauge manifold because it cannot register a vacuum degree of 5Torr(650Pa).
4. Evacuation time
After the degree of vacuum has reached 5Torr(650Pa), evacuate for an additional 1 hour. (A thorough vacuum drying re-
moves moisture in the pipes.)
Verify that the vacuum degree has not risen by more than 1Torr(130Pa) 1hour after evacuation. A rise by less than
1Torr(130Pa) is acceptable.
If the vacuum is lost by more than 1Torr(130Pa), conduct evacuation, following the instructions in section 6. Special vacuum
drying.
5. Procedures for stopping vacuum pump
To prevent the reverse flow of vacuum pump oil, open the relief valve on the vacuum pump side, or draw in air by loosening
the charge hose, and then stop the operation.
The same procedures should be followed when stopping a vacuum pump with a reverse-flow check valve.
6. Special vacuum drying
When 5Torr(650Pa) or lower degree of vacuum cannot be attained after 3 hours of evacuation, it is likely that water has pen-
etrated the system or that there is a leak.
If water infiltrates the system, break the vacuum with nitrogen. Pressurize the system with nitrogen gas to
0.5kgf/cm
2
G(0.05MPa) and evacuate again. Repeat this cycle of pressurizing and evacuation either until the degree of vac-
uum below 5Torr(650Pa) is attained or until the pressure stops rising.
Only use nitrogen gas for vacuum breaking. (The use of oxygen may result in an explosion.)
(Photo1) 15010H (Photo2) 14010
Recommended vacuum gauge:
ROBINAIR 14010 Thermistor Vacuum Gauge
[ I Read Before Servicing ]
- 11 -
HWE08110 GB
[9] Refrigerant Charging
1. Reasons
R410A is a pseudo-azeotropic HFC blend (boiling point R32=-52°C[-62°F], R125=-49°C[-52°F]) and can almost be handled
the same way as a single refrigerant, such as R22. To be safe, however, draw out the refrigerant from the cylinder in the liquid
phase. If the refrigerant in the gaseous phase is drawn out, the composition of the remaining refrigerant will change and become unsuitable for use.
2. Notes
When using a cylinder with a siphon, refrigerant is charged in the liquid state without the need for turning it upside down. Check
the type of the cylinder on the label before use.
[10] Remedies to be taken in case of a Refrigerant Leak
If the refrigerant leaks out, it may be replenished. The entire refrigerant does not need to be replaced. (Charge refrigerant in the
liquid state.)
Refer to "IX [5] Refrigerant Leak".(page 204)
Cylinder with a siphon
Cylinder color R410A is pink. Refrigerant charging in the liquid state
Cylinder
liquid
Valve Valve
liquid
Cylinder
Cylinder without a siphon
[ I Read Before Servicing ]
- 12 -
HWE08110 GB
[11] Characteristics of the Conventional and the New Refrigerants
1. Chemical property
As with R22, the new refrigerant (R410A) is low in toxicity and chemically stable nonflammable refrigerant.
However, because the specific gravity of vapor refrigerant is greater than that of air, leaked refrigerant in a closed room will
accumulate at the bottom of the room and may cause hypoxia.
If exposed to an open flame, refrigerant will generate poisonous gases. Do not perform installation or service work in a confined area.
*1 When CFC11 is used as a reference
*2 When CO
2
is used as a reference
2. Refrigerant composition
R410A is a pseudo-azeotropic HFC blend and can almost be handled the same way as a single refrigerant, such as R22. To
be safe, however, draw out the refrigerant from the cylinder in the liquid phase. If the refrigerant in the gaseous phase is drawn
out, the composition of the remaining refrigerant will change and become unsuitable for use.
If the refrigerant leaks out, it may be replenished. The entire refrigerant does not need to be replaced.
3. Pressure characteristics
The pressure in the system using R410A is 1.6 times as great as that in the system using R22.
New Refrigerant (HFC type) Conventional Refriger-
ant (HCFC type)
R410A R407C R22
R32/R125 R32/R125/R134a R22
Composition (wt%) (50/50) (23/25/52) (100)
Type of Refrigerant Pseudo-azeotropic
Refrigerant
Non-azeotropic
Refrigerant
Single Refrigerant
Chloride Not included Not included Included
Safety Class A1/A1 A1/A1 A1
Molecular Weight 72.6 86.2 86.5
Boiling Point (°C/°F) -51.4/-60.5 -43.6/-46.4 -40.8/-41.4
Steam Pressure
(25°C,MPa/77°F,psi) (gauge)
1.557/226 0.9177/133 0.94/136
Saturated Steam Density
(25°C,kg/m3/77°F,psi)
64.0 42.5 44.4
Flammability Nonflammable Nonflammable Nonflammable
Ozone Depletion Coefficient (ODP)
*1
0 0 0.055
Global Warming Coefficient (GWP)
*2
1730 1530 1700
Refrigerant Charging Method Refrigerant charging in
the liquid state
Refrigerant charging in
the liquid state
Refrigerant charging in
the gaseous state
Replenishment of Refrigerant after a Refrigerant
Leak
Available Available Available
Temperature (°C/°F)
Pressure (gauge)
R410A R407C R22
MPa/psi MPa/psi MPa/psi
-20/-4 0.30/44 0.18/26 0.14/20
0/32 0.70/102 0.47/68 0.40/58
20/68 1.34/194 0.94/136 0.81/117
40/104 2.31/335 1.44/209 1.44/209
60/140 3.73/541 2.44/354 2.33/338
65/149 4.17/605 2.75/399 2.60/377
[ I Read Before Servicing ]
- 13 -
HWE08110 GB
[12] Notes on Refrigerating Machine Oil
1. Refrigerating machine oil in the HFC refrigerant system
HFC type refrigerants use a refrigerating machine oil different from that used in the R22 system.
Note that the ester oil used in the system has properties that are different from commercially available ester oil.
2. Effects of contaminants
*1
Refrigerating machine oil used in the HFC system must be handled with special care to keep contaminants out.
The table below shows the effect of contaminants in the refrigerating machine oil on the refrigeration cycle.
3. The effects of contaminants in the refrigerating machine oil on the refrigeration cycle.
Refrigerant Refrigerating machine oil
R22 Mineral oil
R407C Ester oil
R410A Ester oil
*1. Contaminants is defined as moisture, air, processing oil, dust/dirt, wrong types of refrigerant, and refrigerating machine oil.
Cause Symptoms Effects on the refrigerant cycle
Water infiltration Frozen expansion valve
and capillary tubes
Clogged expansion valve and capillary tubes
Poor cooling performance
Compressor overheat
Motor insulation failure
Burnt motor
Coppering of the orbiting scroll
Lock
Burn-in on the orbiting scroll
Hydrolysis
Sludge formation and adhesion
Acid generation
Oxidization
Oil degradation
Air infiltration Oxidization
Infiltration of
contaminants
Dust, dirt
Adhesion to expansion valve and capillary
tubes
Clogged expansion valve, capillary tubes, and
drier
Poor cooling performance
Compressor overheat
Infiltration of contaminants into the compressor
Burn-in on the orbiting scroll
Mineral oil
etc.
Sludge formation and adhesion Clogged expansion valve and capillary tubes
Poor cooling performance
Compressor overheat
Oil degradation Burn-in on the orbiting scroll
- 14 -
- 15 -
HWE08110 GB
II
Restrictions
[1] System configuration ....................................................................................................... 17
[2] Types and Maximum allowable Length of Cables ...........................................................18
[3] Switch Settings and Address Settings ............................................................................. 19
[4] Sample System Connection............................................................................................. 25
[5] An Example of a System to which an MA Remote Controller is connected..................... 26
[6] An Example of a System to which an ME Remote Controller is connected..................... 36
[7] An Example of a System to which both MA Remote Controller and ME Remote
Controller are connected.................................................................................................. 38
[8] Restrictions on Pipe Length ............................................................................................. 40
- 16 -
[ II Restrictions ]
- 17 -
HWE08110 GB
IIRestrictions
[1] System configuration
1. Table of compatible indoor units
The table below summarizes the types of indoor units that are compatible with different types of outdoor units.
(1) Standard combinations
1) "Maximum total capacity of connectable indoor units" refers to the sum of the numeric values in the indoor unit model names.
2) If the total capacity of the indoor units that are connected to a given outdoor unit exceeds the capacity of the outdoor unit, the
indoor units will not be able to perform at the rated capacity when they are operated simultaneously. Select a combination of
units so that the total capacity of the connected indoor units is at or below the capacity of the outdoor unit whenever possible.
Outdoor
units
Composing units Maximum total capacity
of connectable indoor
units
Maximum number
of connectable
indoor units
Types of connectable
indoor units
200 - - 100 - 260 17 P15 - P250 models
R410A series indoor units
250 - - 125 - 325 21
400 200 200 200 - 520 34
500 250 250 250 - 650 43
[ II Restrictions ]
- 18 -
HWE08110 GB
[2] Types and Maximum allowable Length of Cables
1. Wiring work
(1) Notes
1) Have all electrical work performed by an authorized electrician according to the local regulations and instructions in this manual.
2) Install external transmission cables at least 5cm [1-31/32"] away from the power supply cable to avoid noise interference.
(Do not put the control cable and power supply cable in the same conduit tube.)
3) Provide grounding for the outdoor unit as required.
4) Run the cable from the electric box of the indoor or outdoor unit in such way that the box is accessible for servicing.
5) Do not connect power supply wiring to the terminal block for transmission line. Doing so will damage the electronic components on the terminal block.
6) Use 2-core shielded cables as transmission cables.
Use a separate 2-core control cable for each refrigerant system. Do not use a single multiple-core cable to connect indoor
units that belong to different refrigerant systems. The use of a multiple-core cable may result in signal transmission errors and
malfunctions.
(2) Control wiring
Different types of control wiring are used for different systems.
Refer to section "[5] An Example of a System to which an MA Remote Controller is connected - [7] An Example of a System
to which both MA Remote Controller and ME Remote Controller are connected" before performing wiring work.
Types and maximum allowable length of cables
Control lines are categorized into 2 types: transmission line and remote controller line.
Use the appropriate type of cables and observe the maximum allowable length specified for a given system. If a given system
has a long transmission line or if a noise source is located near the unit, place the unit away from the noise source to reduce
noise interference.
1) M-NET transmission line
Cable type
Facility
type
All facility types
Type Shielded cable CVVS, CPEVS, MVVS
Number of
cores
2-core cable
Cable size Larger than 1.25mm
2
[AWG16]
Maximum transmission
line distance between the
outdoor unit and the farthest indoor unit
200 m [656ft] max.
Maximum transmission
line distance for centralized control and Indoor/
outdoor transmission line
(Maximum line distance
via outdoor unit)
500 m [1640ft] max.
*The maximum overall line length from the power supply unit on the transmission lines for
centralized control to each outdoor unit or to the system controller is 200m [656ft] max.
TB3TB
7
TB
3
TB3TB
7
TB7TB
3
TB
7
TB3TB
7
TB
3
TB3TB
7
TB7TB
3
TB
7
2-core shielded cable
2-core shielded cable
Indoor unit
Outdoor unit
TB3: Terminal block for indoor-outdoor transmission line TB7: Terminal block for centralized control
Remote Controller
Indoor unit
Outdoor unit
Remote Controller
multiple-core cable
[ II Restrictions ]
- 19 -
HWE08110 GB
2) Remote controller wiring
*1 MA remote controller refers to MA remote controller (PAR-20MAA, PAR-21MAA), MA simple remote controller, and
wireless remote controller.
*2 M-NET remote controller refers to ME remote controller and ME simple remote controller.
*3 The use of cables that are smaller than 0.75mm
2
(AWG18) is recommended for easy handling.
*4 When connected to the terminal block on the Simple remote controller, use cables that meet the cable size specifi-
cations shown in the parenthesis.
[3] Switch Settings and Address Settings
1. Switch setting
Refer to section "[5] An Example of a System to which an MA Remote Controller is connected - [7] An Example of a System
to which both MA Remote Controller and ME Remote Controller are connected" before performing wiring work.
Set the switches while the power is turned off.
If the switch settings are changed while the unit is being powered, those changes will not take effect, and the unit will not
function properly.
*1. Applicable when LOSSNAY units are connected to the indoor-outdoor transmission line.
*2. The outdoor units in the same refrigerant circuit are automatically designated as OC and OS in the order of capacity
from large to small (if two or more units have the same capacity, in the order of address from small to large).
*3. Turn off the power to all the outdoor units in the same refrigerant circuit.
MA remote controller
*1
M-NET remote controller
*2
Cable type
Type CVV CVV
Number of
cores
2-core cable 2-core cable
Cable size
0.3 to 1.25mm
2 *3
[AWG22 to 16]
(0.75 to 1.25mm
2) *4
[AWG18 to 16]
0.3 to 1.25mm
2 *3
[AWG22 to 16]
(0.75 to 1.25mm
2) *4
[AWG18 to 16]
Maximum overall line
length
200 m [656ft] max.
The section of the cable that exceeds 10m
[32ft] must be included in the maximum indoor-outdoor transmission line distance.
Units on which to set the switches Symbol Units to which the power must be shut off
CITY MULTI indoor unit Main/sub unit IC Outdoor units
*3
and Indoor units
LOSSNAY, OA processing unit
*1
LC Outdoor units
*3
and LOSSNAY
Air handling kit IC Outdoor units
*3
or field supplied air handling
unit
ME remote controller Main/sub remote
controller
RC Outdoor units
*3
MA remote controller Main/sub remote
controller
MA Indoor units
CITY MULTI outdoor unit
*2
OC,OS Outdoor units
*3
[ II Restrictions ]
- 20 -
HWE08110 GB
2. M-NET Address settings
(1) Address settings table
The need for address settings and the range of address setting depend on the configuration of the system.
*1. Address setting is not required for a City Multi system that consists of a single refrigerant circuit (with some exceptions).
*2. To set the ME remote controller address to "200", set the rotary switches to "00".
*3. To set the outdoor unit address to "100," set the rotary switches to "50."
*4. Some indoor units have 2 or 3 controller boards that require address settings.
No. 2 controller board address must be equal to the sum of the No. 1 controller board address and 1, and the No.3
controller board address must equal to the No. 1 controller address and 2.
*5. The outdoor units in the same refrigerant circuit are automatically designated as OC, OS in the order of capacity from
large to small (if two or more units have the same capacity, in the order of address from small to large).
Unit or controller Address setting
range
Setting method Facto-
ry set-
ting
CITY MULTI indoor unit
Main/sub unit 00,
01 to 50
*1
Assign the smallest address to the main indoor unit in the
group, and assign sequential address numbers to the rest
of the indoor units in the same group.
*4
00
M-NET adapter
M-NET control interface
Free Plan adapter
LOSSNAY, OA processing unit
Air handling kit
00,
01 to 50
*1
Assign an arbitrary but unique address to each of
these units after assigning an address to all indoor
units.
00
ME remote controller
Main remote
controller
101 to 150 Add 100 to the smallest address of all the indoor units
in the same group.
101
Sub remote
controller
151 to 200
*2
Add 150 to the smallest address of all the indoor units
in the same group.
MA remote controller No address settings required. (The main/sub setting must be made if 2
remote controllers are connected to the system.)
Main
CITY MULTI outdoor unit 00,
51 to 100
*1,*3
Assign sequential addresses to the outdoor units in the
same refrigerant circuit. The outdoor units in the same
refrigerant circuit are automatically designated as OC
and OS.
*5
00
System controller Group remote
controller
201 to 250 Assign an address that equals the sum of the smallest
group number of the group to be controlled and 200.
201
System remote
controller
Assign an arbitrary but unique address within the
range listed on the left to each unit.
ON/OFF remote controller
Assign an address that equals the sum of the smallest
group number of the group to be controlled and 200.
Schedule timer
(compatible
with M-NET)
Assign an arbitrary but unique address within the
range listed on the left to each unit.
202
Central controller
G(B)-50A
000,
201 to 250
Assign an arbitrary but unique address within the
range listed on the left to each unit. The address must
be set to "000" to control the K-control unit.
000
LM adapter 201 to 250 Assign an arbitrary but unique address within the
range listed on the left to each unit.
247
[ II Restrictions ]
- 21 -
HWE08110 GB
(2) Power supply switch connector connection on the outdoor unit
(Factory setting: The male power supply switch connector is connected to CN41.)
*1 The need for a power supply unit for transmission lines depends on the system configuration.
*2 The replacement of the power jumper connector from CN41 to CN40 must be performed on only one outdoor unit in the
system.
(3) Settings for the centralized control switch for the outdoor unit (Factory setting: SW2-1 are set to OFF.)
*1. Set SW2-1 on all outdoor units in the same refrigerant circuit to the same setting.
*2. When only the LM adapter is connected, leave SW2-1 to OFF (as it is).
(4) Selecting the position of temperature detection for the indoor unit (Factory setting: SW1-1 set to "OFF".)
To stop the fan during heating Thermo-OFF (SW1-7 and 1-8 on the indoor units to be set to ON), use the built-in thermistor
on the remote controller or an optional thermistor.
1) To use the built-in sensor on the remote controller, set the SW1-1 to ON.
Some models of remote controllers are not equipped with a built-in temperature sensor.
Use the built-in temperature sensor on the indoor unit instead.
When using the built-in sensor on the remote controller, install the remote controller where room temperature can be detected.
(Note) Factory setting for SW1-1 on the indoor unit of the All-Fresh Models is ON.
2) When an optional temperature sensor is used, set SW1-1 to OFF, and set SW3-8 to ON.
When using an optional temperature sensor, install it where room temperature can be detected.
(5) Various start-stop controls (Indoor unit settings)
Each indoor unit (or group of indoor units) can be controlled individually by setting SW 1-9 and 1-10.
*1. Do not cut off power to the outdoor unit. Cutting off the power supply to the outdoor unit will cut off the power supply to the
crankcase heater and may cause the compressor to malfunction when the unit is put back into operation.
*2. Not applicable to units with a built-in drain pump or humidifier.
*3. Models with a built-in drain pump cannot be turned on/off by the plug individually. All the units in the same refrigerant cir-
cuits will be turned on or off by the plug.
*4. Requires that the dipswitch settings for all the units in the group be made.
*5. To control the external input to and output from the air conditioners with the PLC software for general equipment via the
G(B)-50A, set SW1-9 and SW1-10 to ON. With these settings made, the power start-stop function becomes disabled. To
use the auto recovery function after power failure while these settings are made, set SW1-5 to ON.
System configuration
Connection to
the system controller
Power supply unit
for transmission
lines
Group operation
of units in a system with multiple
outdoor units
Power supply switch connector connection
System with
one outdoor unit
_ _ _ Leave CN41 as it is
(Factory setting)
System with
multiple outdoor
units
Not connected _ Not grouped
Grouped Disconnect the male connector from the fe-
male power supply switch connector (CN41)
and connect it to the female power supply
switch connector (CN40) on only one of the
outdoor units.
*2
*Connect the S (shielded) terminal on the ter-
minal block (TB7) on the outdoor unit whose
CN41 was replaced with CN40 to the
ground terminal ( ) on the electric box.
With connection
to the indoor
unit system
Not required Grouped/not
grouped
With connection
to the centralized control
system
Not required
*1
(Powered from the
outdoor unit)
Grouped/not
grouped
Required *
1
Grouped/not
grouped
Leave CN41 as it is
(Factory setting)
System configuration Centralized control switch settings*1
Connection to the system controller Not connected Leave it to OFF. (Factory setting)
Connection to the system controller Connected *
2
ON
Function
Operation of the indoor unit when the operation is resumed after the unit was
stopped
Setting (SW1)
*4 *5
910
Power ON/OFF by
the plug
*1,*2,*3
Indoor unit will go into operation regardless of its operation status before power
off (power failure). (In approx. 5 minutes)
OFF ON
Automatic restoration
after power failure
Indoor unit will go into operation if it was in operation when the power was
turned off (or cut off due to power failure). (In approx. 5 minutes)
ON OFF
Indoor unit will remain stopped regardless of its operation status before power
off (power failure).
OFF ON
[ II Restrictions ]
- 22 -
HWE08110 GB
(6) Miscellaneous settings
Cooling-only setting for the indoor unit: Cooling only model (Factory setting: SW3-1 "OFF.")
When using indoor unit as a cooling-only unit, set SW3-1 to ON.
(7) Various types of control using input-output signal connector on the outdoor unit (various connection options)
*4. By setting Dip SW5-5, the Low-noise mode can be switched between the Capacity priority mode and the Low-noise pri-
ority mode.
When SW5-5 is set to ON: The Low-noise mode always remains effective.
When SW5-5 is set to OFF: The Low-noise mode is cancelled when certain outside temperature or pressure criteria are
met, and the unit goes into normal operation (capacity priority mode).
*5. When multiple outdoor units exist in one refrigerant circuit system, settings on every outdoor unit (signal input) are re-
quired.
CAUTION
1) Wiring should be covered by insulation tube with supplementary insulation.
2) Use relays or switches with IEC or equivalent standard.
3) The electric strength between accessible parts and control circuit should have 2750V or more.
Type Usage Function
Terminal
to be
used
*1
*1. For detailed drawing, refer to "Example of wiring connection".
Option
Input Prohibiting cooling/heating operation (thermo OFF) by an external
input to the outdoor unit.
*It can be used as the DEMAND control device for each system.
DEMAND (level) CN3D
*2
*2. For details, refer to 1) through 4) shown below.
Adapter for
external input
(PACSC36NA-E)
Performs a low level noise operation of the outdoor unit by an external input to the outdoor unit.
* It can be used as the silent operation device for each refrigerant
system.
Low-noise mode
(level)
*3*4
*3. Low-noise mode is valid when Dip SW4-4 on the outdoor unit is set to OFF. When DIP SW4-4 is set to ON, 4 levels of
on-DEMAND are possible, using different configurations of low-noise mode input and DEMAND input settings.When 2
or more outdoor units exist in one refrigerant circuit system, 8 levels of on-DEMAND are possible.
Forces the outdoor unit to perform a fan operation by receiving signals from the snow sensor.
*5
Snow sensor signal
input (level)
CN3S
Cooling/heating operation can be changed by an external input to
the outdoor unit.
Auto-changeover CN3N
Out-
put
How to extract signals from the outdoor unit
*It can be used as an operation status display device.
*It can be used for an interlock operation with external devices.
Operation status of
the compressor
CN51 Adapter for
external output
(PACSC37SA-E)
Error status
Low-noise mode is effective Capacity priority mode becomes effective
Cooling Heating Cooling Heating
TH7 < 30°C [86°F]
and
63HS1 < 32kg/cm
2
TH7 > 3°C [37°F]
and
63LS > 4.6kg/cm
2
TH7 > 35°C [95°F]
or
63HS1 > 35kg/cm
2
TH7 < 0°C [32°F]
or
63LS < 3.9kg/cm
2
[ II Restrictions ]
- 23 -
HWE08110 GB
Example of wiring connection
(1) CN51
(2) CN3S
CN51
X
Y
L
1
L
2
ecruosrewoppmaL
Distant control
board
Relay circuit Adapter
1
Outdoor unit
control board
Preparations
in the field
Maximum cable
length is 10m
5
4
3
X
Y
L1 : Outdoor unit error display lamp
L2 : Compressor operation lamp (compressor running state)
X, Y : Relay (coil =<0.9W : DC12V)
1. Optional part : PAC-SC37SA-E or field supply.
2. Optional part : PAC-SC36NA-E or field supply.
X : Relay
Snow sensor : The outdoor fan runs when X is closed
in stop mode or thermostat mode.
X
CN3S
Preparations
in the field
Maximum cable
length is 10m
Adapter
2
Outdoor unit
control board
2
3
1
Contact rating voltage >= DC15V
Contact rating current >= 0.1A
Minimum applicable load =< 1mA at DC
Relay circuit
(3) CN3N
2. Optional part : PAC-SC36NA-E or field supply.
Preparations
in the field
OFF
CoolingONHeating
Normal
Y
OFF
ON
X
Contact rating voltage >= DC15V
Contact rating current >= 0.1A
Minimum applicable load =< 1mA at DC
X : Cooling / Heating
Y : Validity / Invalidity of X
X,Y : Relay
CN3N
X
Y
Relay circuit
Adapter
2
Outdoor unit
control board
Maximum cable
length is 10m
1
2
3
(4) CN3D
2. Optional part : PAC-SC36NA-E or field supply.
X : Low-noise mode
X : Low-noise mode
Y : Compressor ON/OFF
X,Y : Relay
Contact rating voltage >= DC15V
Contact rating current >= 0.1A
Minimum appicable load =< 1mA at DC
Y
X
CN3D
Preparations
in the field
Maximum cable
length is 10m
Adapter
2
Outdoor unit
control board
3
2
1
Relay circuit
2. Optional part : PAC-SC36NA-E or field supply.
X
CN3D
Preparations
in the field
Maximum cable
length is 10m
Adapter
2
Outdoor unit
control board
2
3
1
X : Relay
fan frequency and maximum compressor frequency.
Contact rating voltage >= DC15V
Contact rating current >= 0.1A
Minimum applicable load =< 1mA at DC
Low-noise mode : The noise level is reduced by controlling the maximum
Relay circuit
[ II Restrictions ]
- 24 -
HWE08110 GB
1) SW4-4: OFF (Compressor ON/OFF, Low-noise mode)
*1. When SW4-4 on the outdoor unit in one refrigerant circuit system is set to ON , this function cannot be used.
*2. This function and the 4 levels on-DEMAND function can be used together. Input the order to CN3D 1-2P on the outdoor unit
whose SW4-4 is set to OFF.
2) When SW4-4 on one outdoor unit in one refrigerant circuit system is set to ON (4 levels of on-DEMAND)
(*3)
*3. Input the order to CN3D on the outdoor unit whose SW4-4 is set to ON.
3) When SW4-4 on the two outdoor units in one refrigerant circuit system is set to ON (8 levels of on-DEMAND)
(*3, *4)
*3. Input the order to CN3D on the outdoor unit whose SW4-4 is set to ON.
*4. CN3D of No. 1, 2, 3 can be selected arbitrary with the outdoor unit whose SW4-4 is set to ON.
CN3D 1-3P Compressor ON/OFF
*1
Open Compressor ON
Short-circuit Compressor OFF
CN3D 1-2P Low-noise mode
*2
Open OFF
Short-circuit ON
CN3D 1-2P
CN3D 1-3P Open Short-circuit
Open 100% (No DEMAND) 75%
Short-circuit 0% (Compressor OFF) 50%
8 levels of on-DEMAND No.2 CN3D
1-2P Open Short-circuit
No.1 CN3D 1-2P 1-3P Open Short-circuit Open Short-circuit
Open Open 100% 50% 88% 75%
Short-circuit 50% 0% 38% 25%
Short-circuit Open 88% 38% 75% 63%
Short-circuit 75% 25% 63% 50%
If the step listed as the wrong example above is taken, thermo may go off.
The percentage of the demand listed in the table above is an approximate value based on the
compressor volume and does not necessarily correspond with the capacity.
When this function is enabled, the night mode cannot be enabled.
(Wrong)
(Correct)
100%
100%
0%
75%
50%
50%
Demand control
steps
Note the following steps to be taken when using the STEP DEMAND
(Example) When switching from 100% to 50%
[ II Restrictions ]
- 25 -
HWE08110 GB
[4] Sample System Connection
Examples of typical system connection are shown on pages [5] to [7].
Refer to the Installation Manual that came with each device or controller for details.
(1) An example of a system to which an MA remote controller is connected
(2) An example of a system to which an ME remote controller is connected
(3) An example of a system to which both MA remote controller and ME remote controller are connected
System
configuration
Connection to the system controller
Address start up for in-
door and outdoor units
Notes
1.
System with one out-
door unit
NO
Automatic
address setup
2.
System with one out-
door unit
NO
Manual
address setup
Connection of
multiple LOSSNAY units
3.
Grouping of units in a
system with multiple
outdoor units
NO
Manual
address setup
4.
System with one out-
door unit
With connection to transmission line
for centralized control
Manual
address setup
5.
System with one out-
door unit
With connection to indoor-outdoor
transmission line
Manual
address setup
System
configuration
Connection to the system controller
Address start up for indoor
and outdoor units
Notes
1.
System with one out-
door unit
With connection to transmission line
for centralized control
Manual
address setup
System
configuration
Connection to the system controller
Address start up for indoor and outdoor units
Notes
1.
System with one out-
door unit
With connection to transmission
line for centralized control
Manual
address setup
- 26 -
[ II Restrictions ]
GBHWE08110
[5] An Example of a System to which an MA Remote Controller is connected
1. System with one outdoor unit (automatic address setup for both indoor and outdoor units)
(1) Sample control wiring
(2) Cautions
1) ME remote controller and MA remote controller cannot
both be connected to the same group of indoor units.
2) No more than 2 MA remote controllers can be connected
to a group of indoor units.
3) Automatic address setup is not available if start-stop input (CN32, CN51, CN41) is used for a group operation of
indoor units. Refer to "[5] 2. Manual address setup for
both indoor and outdoor units".(page 28)
4) To connect more than 2 LOSSNAY units to indoor units
in the same system, refer to the next section "[5] 2. An
example of a system with one outdoor unit to which 2 or
more LOSSNAY units are connected".(page 28)
(3) Maximum allowable length
1) Indoor/outdoor transmission line
Maximum distance (1.25mm
2
[AWG16] or larger)
L1 +L2+L3+L4 200m[656ft]
L1 +L2+L11+L12+L13 200m[656ft]
2) Transmission line for centralized control
No connection is required.
3) MA remote controller wiring
Maximum overall line length
(0.3 to 1.25mm
2
[AWG22 to 16])
m1 200m [656ft]
m2+m3 200m [656ft]
m4+m5 200m [656ft]
IC
TB5STB
15
1 2
00
IC
TB5STB
15
1 2
00
A B
MA
A B
MA
A B
RC
LC
TB5
S
00
IC
TB5
M1M2 M1 M2 M1 M2
M1M2M1M2M1M2
S 1 2
TB
15
IC
TB5STB
15
1 2
0000
IC
TB5STB
15
1 2
00
A B
MA
A B
MA
A B
MA
A B
MA
m1
L11
m2
L3 L4
L12 L13
m3
m5
m4
Interlock operation with
the ventilation unit
TB3
0000
TB7
S
TB3
M1 M2 M1 M2 M1 M2 M1 M2
TB7
S
OC
OS
Leave the male
connector on
CN41 as it is.
SW2-1 OFF
Leave the male
connector on
CN41 as it is.
SW2-1 OFF
Group Group
GroupGroup
L2L1
[ II Restrictions ]
27- 27 -
HWE08110 GB
(4) Wiring method
1) Indoor/outdoor transmission line
Daisy-chain terminals M1 and M2 on the terminal block
for indoor-outdoor transmission line (TB3) on the outdoor
units (OC and OS) (Note), and terminals M1 and M2 on
the terminal block for indoor-outdoor transmission line
(TB5) on each indoor unit (IC). (Non-polarized two-wire)
Only use shielded cables.
The outdoor units in the same refrigerant circuit are automatically designated as OC and OS in the order of capacity from large to small (if two or more units have the
same capacity, in the order of address from small to
large).
Shielded cable connection
Daisy-chain the ground terminal ( ) on the outdoor
units (OC and OS), and the S terminal on the terminal
block (TB5) on the indoor unit (IC) with the shield wire of
the shielded cable.
2) Transmission line for centralized control
No connection is required.
3) MA remote controller wiring
Connect terminals 1 and 2 on the terminal block for MA
remote controller line (TB15) on the indoor unit (IC) to the
terminal block on the MA remote controller (MA). (Nonpolarized two-wire)
When 2 remote controllers are connected to the system
When 2 remote controllers are connected to the system,
connect terminals 1 and 2 of the terminal block (TB15) on
the indoor unit (IC) to the terminal block on the two MA
remote controllers.
Set one of the MA remote controllers to sub. (Refer to
MA remote controller function selection or the installation
manual for the MA remote controller for the setting method.)
Group operation of indoor units
To perform a group operation of indoor units (IC), daisychain terminals 1 and 2 on the terminal block (TB15) on
all indoor units (IC) in the same group, and then connect
terminals 1 and 2 on the terminal block (TB15) on the indoor unit on one end to the terminal block on the MA remote controller. (Non-polarized two-wire)
When performing a group operation of indoor units that
have different functions, "Automatic indoor/outdoor address setup" is not available.
4) LOSSNAY connection
Connect terminals M1 and M2 on the terminal block
(TB5) on the indoor unit (IC) to the appropriate terminals
on the terminal block (TB5) on LOSSNAY (LC). (Non-polarized two-wire)
Interlock operation setting with all the indoor units in the
same system will automatically be made. (It is required
that the Lossnay unit be turned on before the outdoor
unit.)
Refer to "[5] 2. manual address setup for both indoor and
outdoor units" in the following cases: When performing
an interlocked operation of part of the indoor units in the
system with a LOSSNAY unit, using a LOSSNAY unit
alone without interlocking it with any units, performing an
interlock operation of more than 16 indoor units with a
LOSSNAY unit, or connecting two or more LOSSNAY
units to indoor units in the same system, "automatic address setup for both indoor and outdoor units" is not
available.(page 28)
5) Switch setting
No address settings required.
(5) Address setting method
The outdoor units in the same refrigerant circuit are automatically designated as OC and OS.
Proce-
dures
Unit or controller
Address setting
range
Setting
method
Notes
Factory
setting
1 Indoor unit Main unit IC No settings re-
quired.
- To perform a group operation of indoor units that
have different functions,
refer to [5] 2.(page 28)
00
Sub unit IC
2 LOSSNAY LC No settings re-
quired.
-00
3MA
remote controller
Main
remote controller
MA No settings re-
quired.
-Main
Sub
remote controller
MA Sub
remote controller
Settings to
be made according to
the remote
controller
function selection
4 Outdoor unit (Note) OCOSNo settings re-
quired.
-00
- 28 -
[ II Restrictions ]
GBHWE08110
2. An example of a system with one outdoor unit to which 2 or more LOSSNAY units are connected
(manual address setup for both indoor and outdoor units)
(1) Sample control wiring
(2) Cautions
1) ME remote controller and MA remote controller cannot
both be connected to the same group of indoor units.
2) No more than 2 MA remote controllers can be connected
to a group of indoor units.
(3) Maximum allowable length
1) Indoor/outdoor transmission line
Same as [5] 1.
2) Transmission line for centralized control
No connection is required.
3) MA remote controller wiring
Same as [5] 1.
L2
TB3
5152
TB7
S
TB3
TB7
S
IC
TB5STB
15
1 2
01
IC
TB5STB
15
1 2
02
A B
MA
A B
MA
LC
TB5
S
05
IC
TB5
S
1 2
TB
15
IC
TB5STB
15
1 2
0403
LC
TB5
S
06
A B
MA
GroupGroup
Group
M1M2 M1 M2 M1 M2
M1M2M1M2M1M2
L11
L3 L4
L12 L13
M1 M2 M1 M2 M1 M2 M1 M2
L1
OCOS
Leave the male
connector on
CN41 as it is.
SW2-1 OFF
Leave the male
connector on
CN41 as it is.
SW2-1 OFF
Interlock operation with
the ventilation unit
[ II Restrictions ]
29- 29 -
HWE08110 GB
(4) Wiring method
1) Indoor/outdoor transmission line
Same as [5] 1.
Shielded cable connection
Same as [5] 1.
2) Transmission line for centralized control
No connection is required.
3) MA remote controller wiring
Same as [5] 1.
When 2 remote controllers are connected to the system
Same as [5] 1.
Group operation of indoor units
Same as [5] 1.
4) LOSSNAY connection
Connect terminals M1 and M2 on the terminal block
(TB5) on the indoor unit (IC) to the appropriate terminals
on the terminal block (TB5) on LOSSNAY (LC). (Non-polarized two-wire)
Interlock setting between the indoor units and LOSS-
NAY units must be entered on the remote controller. (Refer to "IV [3] Interlock Settings via the MA Remote
Controller" or the installation manual for the MA remote
controller for the setting method.)
5) Switch setting
Address setting is required as follows.
(5) Address setting method
The outdoor units in the same refrigerant circuit are automatically designated as OC and OS.
Proce-
dures
Unit or controller
Address
setting
range
Setting method Notes
Factory
setting
1 Indoor unit Main
unit
IC 01 to 50 Assign the smallest ad-
dress to the main unit in the
group.
To perform a group operation of indoor units that
have different functions,
designate the indoor unit
in the group with the greatest number of functions as
the main unit.
00
Sub unit Assign sequential numbers
starting with the address of
the main unit in the same
group +1. (Main unit address +1, main unit address +2, main unit
address +3, etc.)
2 LOSSNAY LC 01 to 50 Assign an arbitrary but
unique address to each of
these units after assigning
an address to all indoor
units.
None of these addresses
may overlap any of the indoor unit addresses.
00
3MA
remote controller
Main
remote
controller
MA No
settings required.
-Main
Sub
remote
controller
MA Sub
remote
controller
Settings to be made according to the remote controller function selection
4 Outdoor unit OCOS51 to 100 Assign sequential address
to the outdoor units in the
same refrigerant circuit.
The outdoor units are automatically designated as OC
and OS.(Note)
To set the address to 100,
set the rotary switches to
50.
00
- 30 -
[ II Restrictions ]
GBHWE08110
3. Group operation of units in a system with multiple outdoor units
(1) Sample control wiring
(2) Cautions
1) ME remote controller and MA remote controller cannot
both be connected to the same group of indoor units.
2) No more than 2 MA remote controllers can be connected
to a group of indoor units.
3) Do not connect the terminal blocks (TB5) on the indoor
units that are connected to different outdoor units with
each other.
4) Replacement of male power jumper connector (CN41)
must be performed only on one of the outdoor units.
5) Provide grounding to S terminal on the terminal block for
transmission line for centralized control (TB7) on only
one of the outdoor units.
(3) Maximum allowable length
1) Indoor/outdoor transmission line
Maximum distance (1.25mm
2
[AWG16] or larger)
L11+L12 200m [656ft]
L21+L22 200m [656ft]
2) Transmission line for centralized control
L31+L21 200m [656ft]
3) MA remote controller wiring
Same as [5] 1.
4) Maximum line distance via outdoor unit
(1.25mm
2
[AWG16] or more)
L12+L31+L22 500m [1640ft]
IC
TB5STB
15
1 2
01
IC
TB5STB
15
1 2
03
A B
MA
A B
MA
LC
TB5
S
07
IC
TB5
S
1 2
TB
15
IC
TB5STB
15
1 2 1 2
0402
IC
TB5 TB15
S
05
A B
MA
IC
TB5STB
15
1 2
06
A B
MA
Group
Group
Group
Group
M1M2 M1 M2 M1 M2 M1 M2
M1M2M1M2
M1M2
m2
m3
Interlock operation with
the ventilation unit
L12
L22
L11
L21
OC
TB3
TB7
S
51
Connect
Not
connect
OS
TB3
TB7
S
52
M1 M2 M1 M2
M1 M2 M1 M2
OC
TB3
TB7
S
54
OS
TB3
TB7
S
55
M1 M2 M1 M2
M1 M2 M1 M2
L31
Leave the male
connector on
CN41 as it is.
SW2-1 OFF
Leave the male
connector on
CN41 as it is.
SW2-1 OFF
Leave the male
connector on
CN41 as it is.
SW2-1 OFF
SW2-1 OFF
CN41 CN40 Replace
Not
connect
Not
connect
[ II Restrictions ]
31- 31 -
HWE08110 GB
(4) Wiring method
1) Indoor/outdoor transmission line
Same as [5] 1.
Shielded cable connection
Same as [5] 1.
2) Transmission line for centralized control
Daisy-chain terminals M1 and M2 on the terminal block
for transmission line for centralized control (TB7) on the
outdoor units (OC) in different refrigerant circuits and on
the OC and OS in the same refrigerant circuit
If a power supply unit is not connected to the transmission line for centralized control, replace the power jumper connector on the control board from CN41 to CN40 on
only one of the outdoor units.
The outdoor units in the same refrigerant circuit are automatically designated as OC and OS in the order of capacity from large to small (if two or more units have the
same capacity, in the order of address from small to
large).
Only use shielded cables.
Shielded cable connection
Daisy-chain the S terminal on the terminal block (TB7) on
the outdoor units (OC and OS) with the shield wire of the
shielded cable. Short-circuit the earth terminal ( ) and
the S terminal on the terminal block (TB7) on the outdoor
unit whose power jumper connector is mated with CN40.
3) MA remote controller wiring
Same as [5] 1.
When 2 remote controllers are connected to the system
Same as [5] 1.
Group operation of indoor units
Same as [5] 1.
4) LOSSNAY connection
Same as [5] 1.
5) Switch setting
Address setting is required as follows.
(5) Address setting method
The outdoor units in the same refrigerant circuit are automatically designated as OC and OS.
Proce-
dures
Unit or controller
Address setting
range
Setting method Notes
Factory
setting
1 Indoor
unit
Main unit IC 01 to 50 Assign the smallest ad-
dress to the main unit in
the group.
To perform a group
operation of indoor
units that have different functions, designate the indoor unit in
the group with the
greatest number of
functions as the main
unit.
00
Sub unit Assign sequential num-
bers starting with the address of the main unit in
the same group +1. (Main
unit address +1, main unit
address +2, main unit address +3, etc.)
2 LOSSNAY LC 01 to 50 Assign an arbitrary but
unique address to each of
these units after assigning
an address to all indoor
units.
None of these addresses may overlap
any of the indoor unit
addresses.
00
3MA
remote
controller
Main
remote
controller
MA No
settings required.
-Main
Sub
remote
controller
MA Sub
remote controller
Settings to be made according to the remote controller function selection
4 Outdoor unit OCOS51 to 100 Assign sequential address
to the outdoor units in the
same refrigerant circuit.
The outdoor units are automatically designated as
OC and OS. (Note)
To set the address to
100, set the rotary
switches to 50.
00
- 32 -
[ II Restrictions ]
GBHWE08110
4. A system in which a system controller is connected to the transmission line for centralized control and which is powered from an outdoor unit
(1) Sample control wiring
(2) Cautions
1) ME remote controller and MA remote controller cannot
both be connected to the same group of indoor units.
2) No more than 2 MA remote controllers can be connected
to a group of indoor units.
3) Do not connect the terminal blocks (TB5) on the indoor
units that are connected to different outdoor units with
each other.
4) Replacement of male power jumper connector (CN41)
must be performed only on one of the outdoor units.
5) Short-circuit the shield terminal (S terminal) and the
earth terminal ( ) on the terminal block for transmission
line for centralized control (TB7) on the outdoor unit
whose power jumper connector is mated with CN40.
6) When a power supply unit is connected to the transmission line for centralized control, leave the power jumper
connector on CN41 as it is (factory setting).
(3) Maximum allowable length
1) Indoor/outdoor transmission line
Same as [5] 3.
2) Transmission line for centralized control
L31+L32(L21) 200m [656ft]
3) MA remote controller wiring
Same as [5] 1.
4) Maximum line distance via outdoor unit
(1.25mm
2
[AWG16] or more)
L32+L31+L12(L11) 500m [1640ft]
L32+L22(L21) 500m [1640ft]
L12(L11)+L31+L22(L21) 500m[1640ft]
IC
TB5STB
15
1 2
01
IC
TB5STB
15
1 2
02
A B
MA
A B
MA
LC
TB5
S
07
IC
TB5
S
1 2
TB
15
IC
TB5STB
15
1 2
0504
LC
TB5
S
08
IC
TB5STB
15
1 2
03
A B
MA
IC
TB5STB
15
1 2
06
A B
MA
A B
MA
M1 M2 M1 M2 M1 M2 M1 M2
M1 M2 M1 M2 M1 M2 M1 M2
L12L11
L22L21
m3
L31
A B S
L32
Note1
System controller
OC
TB3
TB7
S
51
Connect
Not
connect
m2 m1
OS
TB3
TB7
S
52
M1 M2 M1 M2
M1 M2 M1 M2
OC
TB3
TB7
S
54
OS
TB3
TB7
S
55
M1 M2 M1 M2
M1 M2 M1 M2
Leave the male
connector on
CN41 as it is.
SW2-1 OFF ON
Leave the male
connector on
CN41 as it is.
SW2-1 OFF ON
Leave the male
connector on
CN41 as it is.
SW2-1 OFF ON
SW2-1 OFF ON
CN41 CN40 Replace
Group Group Group
GroupGroup
Interlock operation with
the ventilation unit
Note1 When only the LM adapter is connected,
leave SW2-1 to OFF (as it is).
Note2 LM adapters require the power supply
capacity of single-phase AC 220/240V.
Not
connect
Not
connect
[ II Restrictions ]
33- 33 -
HWE08110 GB
(4) Wiring method
1) Indoor/outdoor transmission line
Same as [5] 1.
Only use shielded cables.
Shielded cable connection
Same as [5] 1.
2) Transmission line for centralized control
Daisy-chain terminals A and B on the system controller,
terminals M1 and M2 on the terminal block for transmission line for centralized control (TB7) on the outdoor
units (OC) in different refrigerant circuits and on the outdoor units (OC and OS) (Note) in the same refrigerant
circuit.
If a power supply unit is not connected to the transmission line for centralized control, replace the power jumper connector on the control board from CN41 to CN40 on
only one of the outdoor units.
If a system controller is connected, set the central control
switch (SW2-1) on the control board of all outdoor units
to "ON."
The outdoor units in the same refrigerant circuit are automatically designated as OC and OS in the order of capacity from large to small (if two or more units have the
same capacity, in the order of address from small to
large).
Only use shielded cables.
Shielded cable connection
Daisy-chain the S terminal on the terminal block (TB7) on
the outdoor units (OC and OS) with the shield wire of the
shielded cable. Short-circuit the earth terminal ( ) and
the S terminal on the terminal block (TB7) on the outdoor
unit whose power jumper connector is mated with CN40.
3) MA remote controller wiring
Same as [5] 1.
When 2 remote controllers are connected to the system
Same as [5] 1.
Group operation of indoor units
Same as [5] 1.
4) LOSSNAY connection
Connect terminals M1 and M2 on the terminal block
(TB5) on the indoor unit (IC) to the appropriate terminals
on the terminal block for indoor-outdoor transmission line
(TB5) on LOSSNAY (LC). (Non-polarized 2-core cable)
Indoor units must be interlocked with the LOSSNAY unit
using the system controller. (Refer to the operation manual for the system controller for the setting method.) Interlock setting from the remote controller is required if the
ON/OFF remote controller alone or the LM adapter alone
is connected.
5) Switch setting
Address setting is required as follows.
(5) Address setting method
The outdoor units in the same refrigerant circuit are automatically designated as OC and OS.
Proce-
dures
Unit or controller
Address
setting
range
Setting method Notes
Factory
setting
1 Indoor unit Main unit IC 01 to 50 Assign the smallest ad-
dress to the main unit in
the group.
To perform a group operation of indoor units that
have different functions,
designate the indoor unit
in the group with the
greatest number of functions as the main unit.
00
Sub unit Assign sequential num-
bers starting with the address of the main unit in
the same group +1. (Main
unit address +1, main unit
address +2, main unit address +3, etc.)
2 LOSSNAY LC 01 to 50 Assign an arbitrary but
unique address to each of
these units after assigning an address to all indoor units.
None of these addresses
may overlap any of the indoor unit addresses.
00
3MA
remote controller
Main
remote
controller
MA No
settings required.
- Enter the same indoor
unit group settings on the
system controller as the
ones that were entered
on the MA remote controller.
Main
Sub
remote
controller
MA Sub
remote controller
Settings to be made according to the remote
controller function selection
4 Outdoor unit OCOS51 to 100 Assign sequential ad-
dress to the outdoor units
in the same refrigerant
circuit.
The outdoor units are automatically designated as
OC and OS.(Note)
To set the address to
100, set the rotary switches to 50.
00
- 34 -
[ II Restrictions ]
GBHWE08110
5. An example of a system in which a system controller is connected to the indoor-outdoor transmission line (except
LM adapter)
(1) Sample control wiring
(2) Cautions
1) ME remote controller and MA remote controller cannot
both be connected to the same group of indoor units.
2) No more than 2 MA remote controllers can be connected
to a group of indoor units.
3) Do not connect the terminal blocks (TB5) on the indoor
units that are connected to different outdoor units with
each other.
4) Replacement of male power jumper connector (CN41)
must be performed only on one of the outdoor units.
5) Provide grounding to S terminal on the terminal block for
transmission line for centralized control (TB7) on only
one of the outdoor units.
6) A maximum of 3 system controllers can be connected to
the indoor-outdoor transmission line, with the exception
that only one G(B)-50A may be connected.
7) When the total number of indoor units exceeds 26, it may
not be possible to connect a system controller on the indoor-outdoor transmission line.
8) In a system to which more than 17 indoor units including
one or more indoor units of 200 model or above are connected, there may be cases in which the system controller cannot be connected to the indoor-outdoor
transmission line.
(3) Maximum allowable length
1) Indoor/outdoor transmission line
Maximum distance (1.25mm
2
[AWG16] or larger)
L11+L12 200m [656ft]
L21+L22 200m [656ft]
L25 200m [656ft]
2) Transmission line for centralized control
L31+L21 200m [656ft]
3) MA remote controller wiring
Same as [5] 1.
4) Maximum line distance via outdoor unit
(1.25mm2 [AWG16] or more)
L25+L31+L12(L11) 500m [1640ft]
L12(L11)+L31+L22(L21) 500m [1640ft]
IC
TB5STB
15
1 2
01
IC
TB5STB
15
1 2
02
A B
MA
A B
MA
LC
TB5
S
07
IC
TB5
S
1 2
TB
15
IC
TB5STB
15
1 2
0504
LC
TB5
S
08
IC
TB5STB
15
1 2
03
A B
MA
IC
TB5STB
15
1 2
06
A B
MA
A B
MA
M1 M2 M1 M2 M1 M2 M1 M2
M1 M2
M1 M2
M1 M2 M1 M2
L12L11
L22L21
m3
OC
TB3
TB7
S
51
m2 m1
OS
TB3
TB7
S
52
M1 M2 M1 M2
M1 M2 M1 M2
OC
TB3
TB7
S
54
OS
TB3
TB7
S
55
M1 M2 M1 M2
M1 M2 M1 M2
L31
A B S
L25
Note1 LM adapters cannot be connected to the
indoor-outdoor transmission line.
Note1
System controller
CN41 CN40 Replace
SW2-1 OFF ON
SW2-1 OFF ON
Leave the male
connector on CN41 as it is.
SW2-1 OFF ON
Leave the male
connector on CN41 as it is.
SW2-1 OFF ON
Leave the male
connector on CN41 as it is.
Connect
Not
connect
Group Group Group
GroupGroup
Interlock operation with
the ventilation unit
Not
connect
Not
connect
[ II Restrictions ]
35- 35 -
HWE08110 GB
(4) Wiring method
1) Indoor/outdoor transmission line
Daisy-chain terminals M1 and M2 on the terminal block
for indoor-outdoor transmission line (TB3) on the outdoor
units (OC and OS) (Note), terminals M1 and M2 on the
terminal block for indoor-outdoor transmission line (TB5)
on each indoor unit (IC), and the S terminal on the system controller. (Non-polarized two-wire)
Only use shielded cables.
The outdoor units in the same refrigerant circuit are automatically designated as OC and OS in the order of capacity from large to small (if two or more units have the
same capacity, in the order of address from small to
large).
Shielded cable connection
Daisy-chain the ground terminal ( ) on the outdoor
units (OC and OS), the S terminal on the terminal block
(TB5) on the indoor unit (IC), and the S terminal on the
system controller with the shield wire of the shielded cable.
2) Transmission line for centralized control
Daisy-chain terminals M1 and M2 on the terminal block
for transmission line for centralized control (TB7) on the
outdoor units (OC) in different refrigerant circuits and on
the OC and OS in the same refrigerant circuit.
If a power supply unit is not connected to the transmission line for centralized control, replace the power jumper connector on the control board from CN41 to CN40 on
only one of the outdoor units.
Set the central control switch (SW2-1) on the control
board of all outdoor units to "ON."
Only use shielded cables.
Shielded cable connection
Daisy-chain the S terminal on the terminal block (TB7) on
the outdoor units (OC and OS) with the shield wire of the
shielded cable. Short-circuit the earth terminal ( ) and
the S terminal on the terminal block (TB7) on the outdoor
unit whose power jumper connector is mated with CN40.
3) MA remote controller wiring
Same as [5] 1.
When 2 remote controllers are connected to the system
Same as [5] 1.
Group operation of indoor units
Same as [5] 1.
4) LOSSNAY connection
Connect terminals M1 and M2 on the terminal block
(TB5) on the indoor units (IC) to the appropriate terminals on the terminal block for indoor-outdoor transmission line (TB5) on LOSSNAY (LC). (Non-polarized 2core cable)
Indoor units must be interlocked with the LOSSNAY unit
using the system controller. (Refer to the operation manual for the system controller for the setting method.) Interlock setting from the remote controller is required if the
ON/OFF remote controller alone is connected.
5) Switch setting
Address setting is required as follows.
(5) Address setting method
The outdoor units in the same refrigerant circuit are automatically designated as OC and OS.
Proce-
dures
Unit or controller
Address set-
ting range
Setting method Notes
Factory
setting
1 Indoor
unit
Main unit IC 01 to 50 Assign the smallest address
to the main unit in the group.
To perform a group operation of indoor units that have
different functions, designate the indoor unit in the
group with the greatest
number of functions as the
main unit.
00
Sub unit Assign sequential numbers
starting with the address of
the main unit in the same
group +1. (Main unit address
+1, main unit address +2,
main unit address +3, etc.)
2 LOSSNAY LC 01 to 50 Assign an arbitrary but
unique address to each of
these units after assigning an
address to all indoor units.
None of these addresses
may overlap any of the indoor unit addresses.
00
3MA
remote
controller
Main
remote
controller
MA No
settings required.
- Enter the same indoor unit
group settings on the system controller as the ones
that were entered on the MA
remote controller.
Main
Sub
remote
controller
MA Sub
remote controller
Settings to be made according to the remote controller
function selection
4 Outdoor unit OCOS51 to 100 Assign sequential address to
the outdoor units in the same
refrigerant circuit.
The outdoor units are automatically designated as OC
and OS. (Note)
To set the address to 100,
set the rotary switches to 50.
00
- 36 -
[ II Restrictions ]
GBHWE08110
[6] An Example of a System to which an ME Remote Controller is connected
(1) Sample control wiring
(2) Cautions
1) ME remote controller and MA remote controller cannot
both be connected to the same group of indoor units.
2) No more than 3 ME remote controllers can be connected
to a group of indoor units.
3) Do not connect the terminal blocks (TB5) on the indoor
units that are connected to different outdoor units with
each other.
4) Replace the power jumper connector of the control board
from CN41 to CN40 on only one of the outdoor units.
5) Provide an electrical path to ground for the S terminal on
the terminal block for centralized control on only one of
the outdoor units.
6) A transmission booster is required in a system to which
more than 16 indoor including one or more indoor units
of the 200 model or above are connected.
7) When a power supply unit is connected to the transmission line for centralized control, leave the power jumper
connector on CN41 as it is (factory setting).
(3) Maximum allowable length
1) Indoor/outdoor transmission line
Same as [5] 3.
2) Transmission line for centralized control
Same as [5] 4.
3) ME remote controller wiring
Maximum overall line length
(0.3 to 1.25mm
2
[AWG22 to 16])
m1 10m [32ft]
m2+m3 10m [32ft]
If the standard-supplied cable must be extended, use a
cable with a diameter of 1.25mm
2
[AWG16]. The section
of the cable that exceeds 10m [32ft] must be included in
the maximum indoor-outdoor transmission line distance
described in (1).
When connected to the terminal block on the Simple remote controller, use cables that meet the following cable
size specifications: 0.75 - 1.25 mm
2
[AWG18-14].
4) Maximum line distance via outdoor unit
(1.25mm
2
[AWG16] or more)
Same as [5] 4.
IC
TB5STB
15
1 2
01
IC
TB5STB
15
1 2
02
LC
TB5
S
07
IC
TB5
S
1 2
TB
15
IC
TB5STB
15
1 2
0504
LC
TB5
S
08
IC
TB5STB
15
1 2
03
IC
TB5STB
15
1 2
06
A B
RC
101
A B
RC
102
A B
RC
103
Group
Group
GroupGroupGroup
M1 M2 M1 M2 M1 M2 M1 M2
M1 M2 M1 M2 M1 M2 M1 M2
L12L11
L22L21
L31
A B S
L32
Note1
System controller
Interlock operation with
the ventilation unit
OC
TB3
TB7
S
51
m1
OS
TB3
TB7
S
52
M1 M2 M1 M2
M1 M2 M1 M2
OC
TB3
TB7
S
54
OS
TB3
TB7
S
55
M1 M2 M1 M2
M1 M2 M1 M2
Leave the male
connector on CN41 as it is.
CN41 CN40 Replace
SW2-1 OFF ON
SW2-1 OFF ON
Leave the male
connector on CN41 as it is.
SW2-1 OFF ON
Leave the male
connector on CN41 as it is.
SW2-1 OFF ON
Connect
Not
connect
Not
connect
104
A B
RC
154
A B
RC
m3
106
A B
RC
m2
Note1 When only the LM adapter is connected,
leave SW2-1 to OFF (as it is).
Note2 LM adapters require the power supply
capacity of single-phase AC 220/240V.
Not
connect
[ II Restrictions ]
37- 37 -
HWE08110 GB
(4) Wiring method
1) Indoor/outdoor transmission line
Same as [5] 1.
Shielded cable connection
Same as [5] 1.
2) Transmission line for centralized control
Same as [5] 4.
Shielded cable connection
Same as [5] 4.
3) ME remote controller wiring
ME remote controller is connectable anywhere on the in-
door-outdoor transmission line.
When 2 remote controllers are connected to the system
Refer to the section on Switch Setting.
Performing a group operation (including the group
operation of units in different refrigerant circuits).
Refer to the section on Switch Setting.
4) LOSSNAY connection
Same as [5] 4.
5) Switch setting
Address setting is required as follows.
(5) Address setting method
The outdoor units in the same refrigerant circuit are automatically designated as OC and OS.
Proce-
dures
Unit or controller
Address setting
range
Setting method Notes
Factory
setting
1 Indoor
unit
Main unit IC 01 to 50 Assign the smallest ad-
dress to the main unit in
the group.
To perform a group
operation of indoor
units that have different functions, designate the indoor unit in
the group with the
greatest number of
functions as the main
unit.
00
Sub unit Assign sequential num-
bers starting with the address of the main unit in
the same group +1.
(Main unit address +1,
main unit address +2,
main unit address +3,
etc.)
2 LOSSNAY LC 01 to 50 Assign an arbitrary but
unique address to each
of these units after assigning an address to all
indoor units.
None of these addresses may overlap
any of the indoor unit
addresses.
00
3ME re-
mote
controller
Main
remote
controller
RC 101 to 150 Add 100 to the main unit
address in the group
It is not necessary to
set the 100s digit.
To set the address
to 200, set the rotary switches to 00.
101
Sub
remote
controller
RC 151 to 200 Add 150 to the main unit
address in the group
4 Outdoor unit OCOS51 to 100 Assign sequential ad-
dress to the outdoor
units in the same refrigerant circuit. The outdoor units are
automatically designated as OC and OS.
(Note)
To set the address to
100, set the rotary
switches to 50.
00
- 38 -
[ II Restrictions ]
GBHWE08110
[7] An Example of a System to which both MA Remote Controller and ME Remote Controller are connected
(1) Sample control wiring
(2) Cautions
1) Be sure to connect a system controller.
2) ME remote controller and MA remote controller cannot
both be connected to the same group of indoor units.
3) Assign to the indoor units connected to the MA remote
controller addresses that are smaller than those of the indoor units that are connected to the ME remote controller.
4) No more than 2 ME remote controllers can be connected
to a group of indoor units.
5) No more than 2 MA remote controllers can be connected
to a group of indoor units.
6) Do not connect the terminal blocks (TB5) on the indoor
units that are connected to different outdoor units with
each other.
7) Replace the power jumper connector of the control board
from CN41 to CN40 on only one of the outdoor units.
8) Provide an electrical path to ground for the S terminal on
the terminal block for centralized control on only one of
the outdoor units.
9) A transmission booster is required in a system to which
more than 16 indoor including one or more indoor units
of the 200 model or above are connected.
10) When a power supply unit is connected to the transmission line for centralized control, leave the power jumper
connector on CN41 as it is (factory setting).
(3) Maximum allowable length
1) Indoor/outdoor transmission line
Same as [5] 3.
2) Transmission line for centralized control
Same as [5] 4.
3) MA remote controller wiring
Same as [5] 1.
4) ME remote controller wiring
Same as [6].
5) Maximum line distance via outdoor unit
(1.25mm
2
[AWG16] or more)
Same as [5] 4.
IC
TB5 TB
15
12
01
IC
TB5 TB
15
12
02
IC
TB5 TB
15
12
06
106
IC
TB5 TB
15
12
05
AB
MA
AB
RC
AB
MA
IC
TB5
12
TB
15
IC
TB5 TB
15
12
0403
104
AB
RC
L11 L12
L21 L22
TB3
TB7
S
TB3
TB7
S
M1M2 M1M2
M1M2 M1 M2
OC
TB3
TB7
S
54
OS
TB3
TB7
S
55
M1M2 M1 M2
M1M2 M1M2
L31
ABS
L32
S
M1 M2
S
M1 M2
S
M1 M2
Leave the male
connector on CN41 as it is.
OCOS
5152
CN41 CN40 Replace
SW2-1 OFF ON
SW2-1 OFF ON
Group Group
GroupGroup
Note1
System controller
Note1 When only the LM adapter is connected,
leave SW2-1 to OFF (as it is).
Note2 LM adapters require the power supply
capacity of single-phase AC 220/240V.
Connect
Not
connect
Leave the male
connector on CN41 as it is.
SW2-1 OFF ON
Leave the male
connector on CN41 as it is.
SW2-1 OFF ON
S
M1 M2
S
M1 M2
S
M1 M2
Not
connect
Not
connect
[ II Restrictions ]
39- 39 -
HWE08110 GB
(4) Wiring method
1) Indoor/outdoor transmission line
Same as [5] 1.
Shielded cable connection
Same as [5] 1.
2) Transmission line for centralized control
Same as [5] 4.
Shielded cable connection
Same as [5] 4.
3) MA remote controller wiring
Same as [5] 1.
When 2 remote controllers are connected to the system
Same as [5] 1.
Group operation of indoor units
Same as [5] 1.
4) ME remote controller wiring
Same as [6] .
When 2 remote controllers are connected to the system
Same as [6] .
Group operation of indoor units
Same as [6] .
5) LOSSNAY connection
Same as [5] 4.
6) Switch setting
Address setting is required as follows.
(5) Address setting method
The outdoor units in the same refrigerant circuit are automatically designated as OC and OS.
Proce-
dures
Unit or controller
Address
setting
range
Setting method Notes
Factory
setting
1Opera-
tion
with the
MA remote
controller
Indoor
unit
Main unit IC 01 to 50
Assign the smallest address
to the main unit in the group.
Assign an address smaller
than that of the indoor unit that
is connected to the ME remote controller.
Make the same indoor unit
group initial settings with the
system controller as the ones
that were made with the MA
remote controller.
To perform a group operation
of indoor units that have different functions, designate the
indoor unit in the group with
the greatest number of functions as the main unit.
00
Sub unit
Assign sequential numbers
starting with the address of
the main unit in the same
group +1. (Main unit address
+1, main unit address +2,
main unit address +3, etc.)
MA
remote
controller
Main remote controller
MA No
settings
required.
-
Main
Sub
remote
controller
MA Sub
remote
controller
Settings to be made according to the remote controller
function selection
2Opera-
tion
with the
ME remote
controller
Indoor
unit
Main unit IC 01 to 50
Assign the smallest address to the main unit in
the group.
Make the indoor unit group ini-
tial settings via the system
controller (MELANS).
Assign an address larger than
those of the indoor units that
are connected to the MA remote controller.
To perform a group operation
of indoor units that have different functions, designate the
indoor unit in the group with
the greatest number of functions as the main unit.
00
Sub unit
Assign sequential numbers
starting with the address of
the main unit in the same
group +1. (Main unit address
+1, main unit address +2,
main unit address +3, etc.)
ME remote
controller
Main remote controller
RC 101 to
150
Add 100 to the main unit address in the group.
It is not necessary to set
the 100s digit.
To set the address to 200,
set the rotary switches to
00.
101
Sub
remote
controller
RC 151 to
200
Add 150 to the main unit address in the group.
3 LOSSNAY LC 01 to 50
Assign an arbitrary but
unique address to each of
these units after assigning an
address to all indoor units.
None of these addresses
may overlap any of the indoor unit addresses.
00
4 Outdoor unit OCOS51 to 100
Assign sequential address to
the outdoor units in the same
refrigerantcircuit. The outdoor units are automatically
designated as OC and
OS.(Note)
To set the address to 100,
set the rotary switches to 50.
00
[ II Restrictions ]
- 40 -
HWE08110 GB
[8] Restrictions on Pipe Length
(1) End branching
HP200, HP250 models
Unit: m [ft]
Operation Pipe sections
Allowable length of
pipes
Length Total pipe length A+B+C+D
+a+b+c+d+e+f
300 [984] or less
Total pipe length (L) from the outdoor unit to the
farthest indoor unit
A+B+C+c or
A+D+f
150 [492] or less
(Equivalent length 175
[574] or less)
Total pipe length from the first branch to the farthest indoor unit ( )
B+C+c or
D+f
40 [131] or less
Height
difference
Between indoor and
outdoor units
Outdoor unit above indoor unit
H 50 [164] or less
Outdoor unit below indoor unit
H' 40 [131] or less
Between indoor units h 15 [49] or less
L
B
e
h
f
6
1
a
c
b
3
2
5
A
D
C
d
4
H
H
'
Branch joint
Indoor Indoor Indoor
Indoor Indoor Indoor
cap
Branch header
(Outdoor unit above indoor unit)
(Outdoor unit below indoor unit)
Outdoor unit
First branch
(Branch joint)
[ II Restrictions ]
- 41 -
HWE08110 GB
HP400, HP500 models
Unit: m [ft]
Operation Pipe sections
Allowable length of
pipes
Length Between outdoor units A+B 10 [32] or less
Total pipe length A+B+C+D+E+F+G+I+J
+a+b+c+d+e+f+g+i
300 [984] or less
Total pipe length (L) from the outdoor unit to the
farthest indoor unit
A(B)+C+G+I+J+i
150 [492] or less
(Equivalent length 175
[574] or less)
Total pipe length from the first branch to the farthest indoor unit ( )
G+I+J+i 40 [131] or less
Height
difference
Between indoor and outdoor units H 50 [164] or less
(40 [131] or below if
outdoor unit is below in-
door unit)
Between indoor units h1 15 [49] or less
Between outdoor units h2 0.1[0.3] or less
Indoor Indoor Indoor Indoor
Indoor Indoor Indoor Indoor
C
L
H
a
h1
h2
b
21
c
3
d
4
e
5
f
6
g
7
i
8
C
D E F
G I J
BA
First branch
(Note)
To downstream units
Note1 Install the pipe that connects the branch pipe and the outdoor units in
the way that it has a downward inclination toward the branch pipe.
Provide a trap on the pipe (gas pipe only) within 2 m from the
joint pipe if the total length of the pipe that connects the joint
pipe and the outdoor unit exceeds 2 m.
Downward inclination
To indoor unit
To indoor unit
To indoor unit
Joint pipe
Joint pipe
Trap
(gas pipe
only)
To indoor unit
Upward inclination
Gas refrigerant distributor
Liquid refrigerant distributor
Note :
"Total sum of downstream unit model numbers"
in the figure above is the sum of the index of
the units after point C in the left figure.
2m[6ft]
2m[6ft] Max.
[ II Restrictions ]
- 42 -
HWE08110 GB
1. Refrigerant pipe size
(1) Diameter of the refrigerant pipe between the outdoor unit and the first branch (outdoor unit pipe size)
(2) Size of the refrigerant pipe between the first branch and the indoor unit (indoor unit pipe size)
(3) Size of the refrigerant pipe between the branches for connection to indoor units
(4) Size of the refrigerant pipe between the first distributor or the second distributor and outdoor units
Outdoor unit set name
(total capacity)
Liquid pipe size (mm) [inch] Gas pipe size (mm) [inch]
200 model ø12.7 [1/2"] ø19.05 [3/4"]
250 model ø12.7 [1/2"] ø22.2 [7/8"]
400 model ø15.88 [5/8"] ø28.58 [1-1/8"]
500 model ø15.88 [5/8"] ø28.58 [1-1/8"]
model Pipe diameter (mm) [inch]
15 - 50 models Liquid pipe ø6.35 [1/4"]
Gas pipe ø12.7 [1/2"]
63 - 140 models Liquid pipe ø9.52 [3/8"]
Gas pipe ø15.88 [5/8"]
200 model Liquid pipe ø9.52 [3/8"]
Gas pipe ø19.05 [3/4"]
250 model Liquid pipe ø9.52 [3/8"]
Gas pipe ø22.2 [7/8"]
Total capacity of the
downstream units
Liquid pipe size (mm) [inch] Gas pipe size (mm) [inch]
- P140 ø9.52 [3/8"] ø15.88 [5/8"]
P141 - P200 ø9.52 [3/8"] ø19.05 [3/4"]
P201 - P300 ø9.52 [3/8"] ø22.2 [7/8"]
P301 - P400 ø12.7 [1/2"] ø28.58 [1-1/8"]
P401 - P650 ø15.88 [5/8"] ø28.58 [1-1/8"]
Liquid pipe size (mm) [inch] Gas pipe size (mm) [inch]
200 model ø9.52 [3/8"] ø19.05 [3/4"]
250 model ø22.2 [7/8"]
- 43 -
HWE08110 GB
III
Outdoor Unit Components
[1] Outdoor Unit Components and Refrigerant Circuit .......................................................... 45
[2] Control Box of the Outdoor Unit.......................................................................................47
[3] Outdoor Unit Circuit Board............................................................................................... 48
- 44 -
[ III Outdoor Unit Components ]
- 45 -
HWE08110 GB
III Outdoor Unit Components
[1] Outdoor Unit Components and Refrigerant Circuit
1. PUHY-HP200, HP250YHM-A
(1) Front view of a outdoor unit
Fan
Control Box
Fan guard
Fin guard
Front panel
Heat exchanger
[ III Outdoor Unit Components ]
- 46 -
HWE08110 GB
(2) Refrigerant circuit
High pressure sensor (63HS1)
High pressure
check joint(CJ1)
4-way valve (21S4b)
4-way valve (21S4a)
Low pressure sensor (63LS)
Low pressure check joint
(CJ2)
Intermediate pressure sensor
(63HS2)
Linear Expansion Valve
(LEV1)
High-pressure
switch(63H1)
Accumulator
Compressor
cover
Compressor
Solenoid valve
(SV1a)
Solenoid valve
(SV9)
Oil separator
Gas side valve (BV1)
Linear Expansion Valve
(LEV4)
Solenoid valve (SV6)
Solenoid valve (SV5b)
Solenoid valve (SV2)
Liquid side valve (BV2)
Subcool coil
Linear Expansion Valve
(LEV2a,2b)
Capillary tube (CP3
Capillary tubeCP1
<Viewed from rear>
[ III Outdoor Unit Components ]
- 47 -
HWE08110 GB
[2] Control Box of the Outdoor Unit
1) Exercise caution not to damage the bottom and the front panel of the control box. Damage to these parts affect the waterproof and dust proof properties of the control box and may result in damage to its internal components.
2) Faston terminals have a locking function. Make sure the cable heads are securely locked in place. Press the tab on the terminals to remove them.
<HIGH VOLTAGE WARNING>
Control box houses high-voltage parts.
When opening or closing the front panel of the control box, do not let it come into contact with any of
the internal components.
Before inspecting the inside of the control box, turn off the power, keep the unit off for at least 10 minutes,
and confirm that the voltage between FT-P and FT-N on INV Board has dropped to DC20V or less.
(It takes about 10 minutes to discharge electricity after the power supply is turned off.)
Control board
DC reactor (DCL)
Electromagnetic relay(72C)
Noise filter
Note.1
INV board
Fan board
Rush current protection resistor
(R1,R5) Note.2
Terminal block for transmission
line (TB3, TB7)
M-NET board
Terminal block for power supply
L1,L2,L3,N,
(TB1)
Capacitor(C100)
[ III Outdoor Unit Components ]
- 48 -
HWE08110 GB
[3] Outdoor Unit Circuit Board
1. Outdoor unit control board
CN332
Output 18VDC
GND
(
Fan board
)
LED2
Lit during normal
CPU operation
CN72
72C
driving output
Serial communication signal input
GND (
INV board)
Output 17VDC
CN801
Pressure switch
connection
CN4
GND
Serial communication signal output
LEV
driving output
LED1
Service LED
SWU1,2
Address switch
SW1-5
Dip
switch
Sensor
input
CNVCC2
Output 12VDC
Output 5VDC
GND
CNIT
Output 12VDC
GND
Output 5VDC
Power supply detection input
Power supply ON/OFF signal output
CNS2
Transmission line input/output
for centralized control system (30VDC)
CN41
Power supply for
centralized control OFF
CN40
Power supply for
centralized control ON
CN102
Indoor/outdoor transmission line input/output (30VDC)
Power supply input for centralized control system (30VDC)
External signal input (contact input)
F01
Fuse
250V AC/3.15A
CNAC
L1
N
LED3
Lit
when powered
LED3
Lit
when powered
Actuator
driving output
Output 12VDC
Compressor
ON/OFF output
Error output
CN51
CNAC2
L1
N
CNDC
Bus voltage input
P
N
CN2
[ III Outdoor Unit Components ]
- 49 -
HWE08110 GB
2. M-NET board
Power supply output for centralized control system
Indoor/outdoor transmission line input/output
CN102
CNS2
Transmission line input/output for
centralized control system
CNIT
Input 12VDC
GND
Input 5VDC
Power supply detection output
Power supply ON/OFF
signal input
LED1
Power supply for
indoor
transmission line
TP1,2
Check pins for
indoor/outdoor
transmission line
TB7
Terminal block for
transmission line for
centralized control
TB3
Indoor/outdoor
transmission block
Ground terminal for
transmission line
Grounding
Grounding
CN04
Bus voltage input
P
N
Grounding
[ III Outdoor Unit Components ]
- 50 -
HWE08110 GB
3. INV board
1) Before inspecting the inside of the control box, turn off the power, keep the unit off for at least 10 minutes, and confirm that
the voltage between FT-P and FT-N on INV Board has dropped to DC20V or less.
It takes about 10 minutes to discharge electricity after the power supply is turned off.
SC-L1
Input(L1)
SC-L2
Input(L2)
SC-L3
Input(L3)
IGBT
(Rear)
Bus voltage check
terminal (P)
Note
Bus voltage check
terminal (N)
Note 1
SC-P2
Bus voltage Input(P)
SC-P1
Rectifier diode output (P)
LED1
Lit: Inverter in normal operation
Blink: Inverter error
CN6
Open: No-load operation setting
Short-circuited: Normal setting
CN5V
GND
Output 5VDC
RSH1
Overcurrent detection
resistor
CN4
GND
(INV Board)
Serial communication
signal output
CN2
S
erial communication
signal output
GND
Input 17VDC
SC-V
Inverter output(V)
CNTYP Inverter
board type
SC-W
Inverter output(W)
SC-U
Inverter output(U)
CT22
Current sensor(W)
CT12
Current sensor(U)
C30 C37
Smoothing capacitor
CN1
Bus voltage output
N
P
CT3
Current sensor(L3)
[ III Outdoor Unit Components ]
- 51 -
HWE08110 GB
4. Fan board
CNVDC
Bus voltage input
N
P
CNINV
Inverter output
W
V
U
CN18V
Input 18VDC
GND
LED3
Lit during normal
CPU operation
CN4
GND
Serial communication signal output
CN5
GND(Control board)
Serial communication signal output
CN21
Serial communication signal output
GND(INV board)
Input 17VDC
CN22
GND(INV board)
Input 5VDC
Serial communication signal input
GND(INV board)
Output 17VDC
THBOX
Thermistor
(Control box internal temperature
detection)
LED1
Inverter in normal operation
LED2
Inverter error
DIP IPM Rear
R630,R631
Overcurrent detection
resistor
[ III Outdoor Unit Components ]
- 52 -
HWE08110 GB
5. Noise Filter
CN4
Output
(Rectified L2-N current)
P
N
CN5
Output
(Rectified L2-N current)
P
N
TB21
Input/output(L1)
TB22
Input/output(L2)
TB23
Input/output(L3)
TB24
Input(N)
CN1B
Input
L3
L2
CN1A
Input
N
L1
Grounding
F1,F2,F3,F4
Fuse
250VAC 6.3A
CN3
Output
L1
N
Grounding
CN2
Surge absorber circuit
Surge absorber circuit
Short circuit
Short circuit
- 53 -
HWE08110 GB
IV
Remote Controller
[1] Functions and Specifications of MA and ME Remote Controllers ...................................55
[2] Group Settings and Interlock Settings via the ME Remote Controller .............................56
[3] Interlock Settings via the MA Remote Controller ............................................................. 60
[4] Using the built-in Temperature Sensor on the Remote Controller ................................... 61
- 54 -
[ IV Remote Controller ]
- 55 -
HWE08110 GB
IV Remote Controller
[1] Functions and Specifications of MA and ME Remote Controllers
There are two types of remote controllers: ME remote controller, which is connected on the indoor-outdoor transmission
line, and MA remote controller, which is connected to each indoor unit.
1. Comparison of functions and specifications between MA and ME remote controllers
2. Remote controller selection criteria
MA remote controller and ME remote controller have different functions and characteristics. Choose the one that better suits
the requirements of a given system. Use the following criteria as a reference.
Functions/specifications MA remote controller
*1*2
*1. MA remote controller refers to MA remote controller (PAR-20MAA, PAR-21MAA), MA simple remote controller, and wire-
less remote controller.
*2. Either the MA remote controller or the ME remote controller can be connected when a group operation of units in a sys-
tem with multiple outdoor units is conducted or when a system controller is connected.
ME remote controller
*2*3
*3. ME remote controller refers to ME remote controller and ME simple remote controller.
Remote controller address settings Not required Required
Indoor/outdoor unit address settings
Not required (required only by a system
with one outdoor unit)
*4
*4. Depending on the system configuration, some systems with one outdoor unit may require address settings.
Required
Wiring method Non-polarized 2-core cable
To perform a group operation, daisy-
chain the indoor units using non-polarized 2-core cables.
Non-polarized 2-core cable
Remote controller connection Connectable to any indoor unit in the
group
Connectable anywhere on the indoor-outdoor transmission line
Interlock with the ventilation unit Each indoor unit can individually be in-
terlocked with a ventilation unit. (Set up
via remote controller in the group.)
Each indoor unit can individually be interlocked with a ventilation unit. (Set up via
remote controller.)
Changes to be made upon grouping change
MA remote controller wiring between indoor units requires rewiring.
Either the indoor unit address and remote
controller address must both be changed,
or the registration information must be
changed via MELANS.
MA remote controller
*1*2
ME remote controller
*1*2
There is little likelihood of system expansion and group-
ing changes.
Grouping (floor plan) has been set at the time of instal-
lation.
There is a likelihood of centralized installation of remote
controllers, system expansion, and grouping changes.
Grouping (floor plan) has not been set at the time of in-
stallation.
To connect the remote controller directly to the OA pro-
cessing unit.
*1. ME remote controller and MA remote controller cannot both be connected to the same group of indoor units.
*2. A system controller must be connected to a system to which both MA remote controller and ME remote controller are con-
nected.
<System with MA remote controller> <System with ME remote controllers>
MA remote controller
Outdoor unit
Indoor unit
M-NET transmission line
(indoor/outdoor transmission line)
groupgroup
ME remote controller
Outdoor unit
Indoor unit
M-NET transmission line
(indoor/outdoor transmission line)
groupgroup
[ IV Remote Controller ]
- 56 -
HWE08110 GB
[2] Group Settings and Interlock Settings via the ME Remote Controller
1. Group settings/interlock settings
<Deletion error>
[Normal display]
(B) Interlock Settings (A) Group Settings
Indoor unit address display window
Indoor unit
address
display window
Interlocked unit
address
display window
Make the following settings to perform a group operation of units that are connected to different outdoor units or to manually set up the
indoor/outdoor unit address.
(A) Group settings...........Registration of the indoor units to be controlled with the remote controller,
and search and deletion of registered information.
(B) Interlock settings........Registration of LOSSNAY units to be interlocked with the indoor units,
and search and deletion of registered information
[Operation Procedures]
(1) Address settings
Register the indoor unit to be controlled with the remote controller.
Bring up either the blinking display of HO by turning on the unit or the
normal display by pressing the ON/OFF button.
The display window must look like one of the two figures below to proceed to the
next step.
1
2
Bring up the Group Setting window.
-Press and hold buttons [FILTER] and [ ]
simultaneously for 2 seconds to bring up the display as
shown below.
3
A
C
D
B
Select the unit address.
-
Select the address of the indoor unit to be registered by pressing
button
[TEMP. ( ) or ( )] to advance or go back
through the addresses.
Register the indoor unit whose address appears on the
display.
- Press button [TEST] to register the indoor unit address
whose address appears on the display.
- If registration is successfully completed, unit type will appear
on the display as shown in the figure below.
- If the selected address does not have a corresponding indoor
unit, an error message will appear on the display. Check the
address, and try again.
5
<Successful completion of registration>
Unit type (Indoor unit in this case)
blinks to indicate a registration error.
(Indicates that selected address does not have a
corresponding unit.)
4
To register the addresses for multiple indoor units, repeat
steps and above.
3
4
To search for an address,
go to section (2) Address Search.
To next page.
To search for an address,
go to section (2) Address Search.
Bring up the Interlock Setting window.
-Press button [ ] to bring up the following display.
Press again to go back to the Group Setting window as shown
under step .
6
G
2
Both the indoor unit address and
interlocked unit address will be
displayed together.
Bring up the address of the indoor unit and the address of the
LOSSNAY to be interlocked on the display.
- Select the address of the indoor unit to be registered by pressing
button [TEMP. ( ) or ( )] to advance or go back through
the addresses.
- Select the address of the LOSSNAY unit to be interlocked by
pressing button [TIMER SET ( ) or ( )] to advance or go back
through the interlocked unit addresses.
7
8
C
H
Make the settings to interlock LOSSNAY units with indoor
units.
- Press button [TEST] while both the indoor unit address and
the address of the LOSSNAY units to be interlocked
are displayed to enter the interlock setting.
- Interlock setting can also be made by bringing up the
LOSSNAY address in the indoor unit address display
window and the indoor unit address in the interlocked unit
address display window.
D
(Displayed alternately)
If registration is successfully
completed, the two displays as
shown on the left will appear
alternately.
If the registration fails,
will blink on the display.
(Indicates that the selected
address does not have a
corresponding unit.)
NOTE : Interlock all the indoor units in the group with the
LOSSNAY units; otherwise, the LOSSNAY units will
not operate.
[Blinking display of HO ]
?
A
F
D
B
H
G
C
E
PAR-F27MEA
ON/OFF
CENTRALLY CONTROLLED
DAILY
AUTO OFF
REMAINDER
CLOCK
ON OFF
˚C
CHECK MODE
FILTER
TEST RUN
LIMIT TEMP.
˚C
1Hr.
NOT AVAILABLE
STAND BY
DEFROST
FILTER
CHECK TEST
TEMP.
TIMER SET
CLOCK→ON→OFF
[ IV Remote Controller ]
- 57 -
HWE08110 GB
<Entry found>
<No entries found>
(C) To return to the normal display
When all the group settings and interlock settings are made, take the
following step to go back to the normal display.
Press and hold buttons [FILTER] and [ ]
simultaneously for 2 seconds to go back to the
window as shown in step .
(2) Address search
To search for the address of indoor units that have been entered into
the remote controller, follow steps and .
(A) To search group settings
Unit type
(Indoor unit in this case)
- When only one unit address is registered, the same address
will remain on the display regardless of how many times the
button is pressed.
- When the address of multiple units are registered
(i.e. 011, 012, 013 ), they will be displayed one at a time in
an ascending order with each pressing of button [ ] .
To delete an address, go to
section (3) Address Deletion.
To go back to the normal display,
follow step .
(Displayed alternately)
To delete an address,
go to section (3) Address Deletion .
Bring up the address of another registered unit on the
display.
- After completing step , a subsequent pressing of button
[ ] will bring up the address of another registered
unit.
(The display method is the same as the one in step .)
Address of an interlocked
LOSSNAY unit
Address of another
interlocked unit
Bring up on the display the address of the LOSSNAY unit
that was interlocked with the indoor unit in step .
- With each pressing of button [ ], the address of the
LOSSNAY and indoor unit that is interlocked with it will be
displayed alternately.
LOSSNAY can be searched in the same manner by bringing up
the LOSSNAY address in the Interlocked unit address display window.
(B) Interlock setting search
After performing step , proceed as follows:
Bring up the address of the indoor unit to be searched on
the display.
- Select the address of the indoor unit to be searched by pressing
button [TIMER SET ( ) or ( )] to advance or go back
through the interlocked addresses.
Repeat steps and in the previous page to interlock
all the indoor units in a group with the LOSSNAY unit.
7
8
To go back to the normal display,
follow step .
To search for an address,
go to section (2) Address Search.
(3) Address deletion
The addresses of the indoor units that have been entered into the remote controller can be deleted by deleting the group settings.
The interlock settings between units can be deleted by deleting the interlock settings.
Follow the steps in section (2) Address Search to find the address to be deleted and perform deletion with the address being displayed in the
display window. To delete an address, the address must first be bought up on the display.
Delete the registered indoor unit address or the interlock setting between units.
- Press button ? [CLOCK ON OFF] twice while either the indoor unit address or the address of the interlocked unit is displayed on the
display to delete the interlock setting.
(Displayed alternately)
10
A
B
1
Bring up the Group Setting window.
- Each pressing of button [ ] will bring up the address of a
registered indoor unit and its unit type on the display.
11
E
1
2
E
10
E
13
13
13
12
14
12
6
E
H
9
10
F
15
[ IV Remote Controller ]
- 58 -
HWE08110 GB
2. Remote controller function selection via the ME remote controller
(A) To delete group settings
(B) To delete interlock settings
<Successful completion of deletion>
will be displayed in the room temperature display window.
- If a transmission error occurs, the selected setting will not be
deleted, and the display will appear as shown below.
In this case, repeat the steps above.
(Displayed alternately)
<Deletion error>
will be displayed in the room temperature display window.
(4) Making (A) Group settings and (B) Interlock settings of a group from any arbitrary remote controller
(A) Group settings and (B) Interlock settings of a group can be made from any arbitrary remote controller.
Refer to (B) Interlock Settings under section 1 Group Settings/Interlock Settings for operation procedures.
Set the address as shown below.
(A) To make group settings
Interlocked unit address display window...Remote controller address
Indoor unit address display window...........The address of the indoor unit to be controlled with the remote controller
(B) To make interlock settings
Interlocked unit address display window...LOSSNAY address
Indoor unit address display window..........The address of the indoor unit to be interlocked with the LOSSNAY
If deletion is successfully
completed, will appear in
the unit type display window.
If the deletion fails, will
appear in the unit type display
window. In this case, repeat the
steps above.
- -
To go back to the normal display, follow step .
10
In the remote controller function selection mode, the settings for four types of functions can be made or changed as necessary.
4) Narrowed preset temperature range mode
The default temperature ranges are 19 C to 30 C in the cooling/dry mode and 17 C to 28 C in the heating mode and 19 C to 28 C in the auto mode.
By changing these ranges (raising the lower limit for the cooling/dry mode and lowering the upper limit for the heating mode), energy can be saved.
When making the temperature range setting on the simultaneous cooling/heating type units that supports the automatic operation mode to save on
energy consumption, enable the Skip-Auto-Mode setting to make the automatic operation mode unselectable. If the automatic operation mode is
selected, the energy-saving function may not work properly.
When connected to the air conditioning units that do not support the automatic operation mode, the setting for the Skip-Auto-Mode, restricted preset
temperature range mode (AUTO), and operation mode display selection mode are invalid. If an attempt is made to change the preset temperature range,
“LIMIT TEMP.” appears on the display.
NOTE
[Normal display]
4
5
PAR-F27MEA
ON/OFF
FILTER
CHECK TEST
TEMP.
TIMER SET
CLOCKĺONĺOFF
1
3
2
: Press and hold the [CHECK] and
[ ] buttons simultaneously
for two seconds.
: [SET TEMP.
( ) ]
button
: [SET TEMP.
( ) ]
button
3) Room temperature display selection mode (Display or non-display of room temperature)
Although the suction temperature is normally displayed on the remote controller, the setting can be changed so that it will not appear on the
remote controller.
2) Operation mode display selection mode (Display or non-display of COOL/HEAT during automatic operation mode)
When the automatic operation mode is selected, the indoor unit will automatically perform a cooling or heating operation based on the room
temperature. In this case, or will appear on the remote controller display.
This setting can be changed so that only will appear on the display.
1) Skip-Auto-Mode setting
The automatic operation mode that is supported by some simultaneous cooling/heating type units can be made unselectable via the ME remote
controller.
[Function selection mode sequence on the remote controller]
Normal display
1 1
3
3
3
2
2
2
3
2
3
2
3
2
3
2
Skip-Auto-Mode setting
*1 *1
*2
*2
Temperature range setting mode (AUTO)
Room temperature display selection mode
*1 : Skip-Auto-Mode is enabled
*2 : Skip-Auto-Mode is disabled
Operation mode display selection mode (Display or non-display of the automatic mode)
Restricted preset temperature range mode (Heating)
Restricted preset temperature range mode (Cooling)
Remote controller function selection mode
[ IV Remote Controller ]
- 59 -
HWE08110 GB
[Lower limit temperature]: Appears in the preset temperature display window [Upper limit temperature: Appears in the time display window
[Settable range for the lower limit temperature] : 19 C 30 C(14 C 30 C) / 67 F 87 F(57 F 87 F)
(Settable up to the upper limit temperature that is shown on the display)
[Settable range for the upper limit temperature] : 30 C 19 C(30 C 14 C) / 87 F 67 F(87 F 57 F)
(Settable up to the lower limit temperature that is shown on the display)
The values in the parentheses are applicable to PDFY, PEFY, and PFFY-E.
[Settable range for the lower limit temperature] : 19 C 28 C(17 C 28 C) / 67 F 83 F(63 F 83 F)
(Settable up to the upper limit temperature that is shown on the display)
[Settable range for the upper limit temperature] : 28 C 19 C(28 C 17 C) / 83 F 67 F(83 F 63 F)
(Settable up to the lower limit temperature that is shown on the display)
The values in the parentheses are applicable to PDFY, PEFY, and PFFY-E.
[Settable range for the lower limit temperature] : 17 C 28 C / 63 F 83 F
(Settable up to the upper limit temperature that is shown on the display)
[Settable range for the upper limit temperature] : 28 C 17 C / 83 F 63 F
(Settable up to the lower limit temperature that is shown on the display)
will light up in the display window, and the temperature range for the cooling/dry mode will appear on the display.
[Operation Procedures]
1. Press the [ON/OFF] button on the remote controller to bring the unit to a stop. The display will appear as shown in the previous page (Normal
display).
2. Press buttons [CHECK] and [ ] simultaneously for 2 seconds to go into the “Skip-Auto-Mode setting.”
under the remote controller function selection mode. Press button [SET TEMP. ( )] or [SET TEMP. ( )] to go into the other four modes
under the remote controller function selection mode.
1
2
3
Skip-Auto-Mode setting (Making the automatic operation mode unselectable)
“ ” blinks and either “ON” or “OFF” lights up on the controller. Pressing the [TIMER SET ( ) or ( )] button switches
between “ON” and “OFF.”
This setting is valid only when the controller is connected to the simultaneous cooling/heating type air conditioning units that
support the automatic operation mode.
When set to “ON,” the automatic operation mode is available for selection in the function selection mode.
When set to “OFF,” the automatic operation mode is not available for selection in the function selection mode, and an automatic operation
cannot be performed.
(The automatic operation mode is skipped in the function selection mode sequence.)
[The left figure shows the display that appears when the current temperature range setting is between 19 C [67 F] and 30 C [87 F]
in the Cool/Dry mode, and the lower limit temperature is selected to be set.]
2) Temperature range setting for heating
4
Switch between the Lower and Upper limit temperature setting by pressing the [CLOCK-ON-OFF] button. The selected temperature setting blinks.
“ ” and the settable temperature range for heating appear on the display.
As with the Cool/Dry mode, use the [CLOCK-ON-OFF] button and the [TIMER SET ( ) or ( )] to set the temperature range.
5
Room temperature display selection mode (Switching between the display or non-display of room temperature on the controller)
When set to “ON,” room temperature always appears on the display during operation.
When set to “OFF,” room temperature does not appear on the display during operation.
5
4
“ ” and the temperature range for the automatic operation mode appear on the display.
As with the Cool/Dry mode, use the [CLOCK-ON-OFF] button and the [TIMER SET ( ) or ( )] to set the temperature range.
5
4
3) Temperature range setting for the automatic mode
˚C ˚C
“ 88 C ” blinks and either “ON” or “OFF” lights up on the controller. Pressing the [TIMER SET ( ) or ( )] button
switches between “ON” and “OFF.”
4
Operation mode display selection mode (Changing the type of display that appears during the automatic mode operation)
will blink, and either
“ON”or“
OFF” will light up.
Press button [TIMER SET ( ) or ( )] in this state to
switch between “ON” and “OFF.”
4
When it is set to ON, will appear on the display during automatic operation mode.
When it is set to OFF, only will appear on the display during automatic operation mode.
When connected to the air conditioning units that do not support the automatic operation mode, the setting for this mode is invalid.
[TIMER SET ( ) (( ))] button
[TIMER SET ( ) (( ))] button
[TIMER SET ( ) (( ))] button
[TIMER SET ( ) (( ))] button
Restricted preset temperature range mode (The range of preset temperature can be changed.)
1) Temperature range setting for the cooling/dry mode
Press button [TIMER SET ( ) or ( )] to set the lower limit temperature to the desired temperature.
4
When connected to the air conditioning units that do not support the automatic operation mode, the setting for this mode is invalid.
[ IV Remote Controller ]
- 60 -
HWE08110 GB
[3] Interlock Settings via the MA Remote Controller
1. LOSSNAY interlock setting (Make this setting only when necessary.)
[Operation Procedures]
<Indoor unit address and indoor unit> <LOSSNAY address and LOSSNAY>
- Without interlocked LOSSNAY settings
Search result
- The indoor unit address and the interlocked LOSSNAY address will appear alternately.
Press the [ON/OFF] button on the remote controller to bring the unit to a stop.
The display window on the remote controller must look like the figure below to proceed to step .
Make this setting only when necessary.
Perform this operation to enter the interlock setting between the LOSSNAY and the indoor units to which the remote controller is connected, or to
search and delete registered information.
In the following example, the address of the indoor unit is 05 and the address of the LOSSNAY unit is 30.
2
< 1. Registration Procedures >
Indoor unit address LOSSNAY address
Press the [TEST] button to register the address of the selected indoor unit and the interlocked LOSSNAY unit.
- Registration completed
The registered indoor unit address and IC, and the interlocked LOSSNAY address and LC will appear alternately.
- Registration error
If the registration fails, the indoor unit address and the LOSSNAY address will be displayed alternately.
Registration cannot be completed: The selected unit address does not have a corresponding indoor unit or a LOSSNAY unit.
Registration cannot be completed: Another LOSSNAY has already been interlocked with the selected indoor unit.
1
3
2
Press and hold the [FILTER] and [ ] buttons simultaneously for two seconds to perform a search for the LOSSNAY that is interlocked with the
indoor unit to which the remote controller is connected.
If no settings are necessary, exit the window by pressing and holding the [FILTER] and [ ] buttons simultaneously for 2 seconds.
Go to step 1. Registration Procedures to make the interlock settings with LOSSNAY units, or go to step 2. Search Procedures to search for a
particular LOSSNAY unit.
Go to step 3. Deletion Procedures to delete any LOSSNAY settings.
To interlock an indoor unit with a LOSSNAY unit, press the [ TEMP. ( ) or ( )] button on the remote controller that is connected to the indoor
unit, and select its address (01 to 50).
Press the [ CLOCK ( ) or ( )] button to select the address of the LOSSNAY to be interlocked (01 to 50).
5
4
7
6
[ IV Remote Controller ]
- 61 -
HWE08110 GB
[4] Using the built-in Temperature Sensor on the Remote Controller
1. Selecting the position of temperature detection (Factory setting: SW1-1 on the controller board on the indoor unit is
set to OFF.)
To use the built-in sensor on the remote controller, set the SW1-1 on the controller board on the indoor unit to ON.
Some models of remote controllers are not equipped with a built-in temperature sensor. Use the built-in temperature sensor
on the indoor unit instead.
When using the built-in sensor on the remote controller, install the remote controller where room temperature can be detected.
<Indoor unit address>
- Search completed (No interlocked settings with a LOSSNAY exist.)
- The selected address does not have a corresponding indoor unit.
< 2. Search Procedures >
< 3. Deletion Procedures >
Press the [ MENU] button to search for the address of the LOSSNAY unit that is interlocked with the selected indoor unit.
- Search completed (With a LOSSNAY connection)
The indoor unit address and IC, and the interlocked LOSSNAY address and LC will appear alternately.
Take the following steps to delete the interlock setting between a LOSSNAY unit and the interlocked indoor unit from the remote controller
that is connected to the indoor unit.
Find the address of the LOSSNAY to be deleted (See section 2. Search Procedures. ), and bring up the result of the search for both the
indoor unit and LOSSNAY on the display.
Press the [ ON/OFF] button twice to delete the address of the LOSSNAY unit that is interlocked with the selected indoor unit.
- Registration completed
The indoor unit address and , and the interlocked LOSSNAY address and will appear alternately.
-Deletion error
If the deletion fails
8
9
10
11
To search for the LOSSNAY unit that is interlocked with a particular indoor unit, enter the address of the indoor unit into the remote controller that is
connected to it.
- 62 -
- 63 -
HWE08110 GB
V
Electrical Wiring Diagram
[1] Electrical Wiring Diagram of the Outdoor Unit .................................................................65
[2] Electrical Wiring Diagram of Transmission Booster......................................................... 66
- 64 -
[ V Electrical Wiring Diagram ]
- 65 -
HWE08110 GB
VElectrical Wiring Diagram
[1] Electrical Wiring Diagram of the Outdoor Unit
1. Electrical wiring diagram of the outdoor unit
(1) PUHY-HP200, HP250 models
Outdoor unit heat exchanger
capacity control
21S4b
SV5b
Outdoor unit heat exchanger
capacity control
For opening/closing the injection
circuit
LEV4
Cooling/Heating switching
SV6
For opening/closing the subcool
bypass circuit
Low pressure
63LS
For opening/closing the bypass
circuit
For opening/closing the discharge
suction bypass
Solenoid
valve
Control box internal temperature
THBOX
Pipe temperature
Z24,25
Thermistor
Subcool bypass outlet
temperature
Discharge pipe temperature
Subcooled liquid refrigerant
temperature
OA temperature
IGBT temperature
Function setting connector
THHS
TH7
TH6
TH4
TH3
TH2
Power supply
Explanation
Indoor/Outdoor transmission
cable
Central control transmission
cable
Terminal
block
TB7
TB3
TB1
Symbol
Pressure control,Refrigerant flow
rate control
DC reactorDCL
SV1a
LEV2a,b
LEV1
Linear
expansion
valve
Solenoid
valve
HIC bypass,Controls refrigerant
flow in HIC circuit
CT12,22,3
CH11
Crankcase heater(for heating the compressor)
Current sensor(AC)
Magnetic relay(inverter main circuit)
72C
Middle pressure
Discharge pressure
High pressure protection for the
outdoor unit
Pressure
switch
Pressure
sensor
63HS2
63H1
Symbol
Explanation
4-way valve21S4a
For opening/closing the bypass
circuit under the O/S
SV2
SV9
63HS1
<Symbol explanation>
*1. Single-dotted lines indicate wiring
not supplied with the unit.
*2. Dot-dash lines indicate the control
box boundaries.
*3. Refer to the Data book for connecting
input/output signal connectors.
*4. Daisy-chain terminals (TB3) on the
outdoor units in the same refrigerant
system together.
*5. Faston terminals have a locking
function.Make sure the terminals
are securely locked in place after
insertion.Press the tab on the
terminals to removed them.
*6. Control box houses high-voltage parts.
Before inspecting the inside of the
control box,turn off the power,keep
the unit off for at least 10 minutes,
and confirm that the voltage between
FT-P and FT-N on INV Board has dropped
to DC20V or less.
CN506
X05
SV5b
1
3
6
21S4b
X01
CN501
1
3
LED1:Power supply to
Indoor/Outdoor
transmission line
LEV4
M
CNLVE
yellow
65432
1
63HS2
CN992
yellow
123
312
CN510
red
X13
1
3
6
SV6
SV2
3
DCL
t
°
M1 M2
SV1a
Z3
21
-+
M-NET power
supply circuit
C5
LED3:CPU in
operation
LED1:Normal
operation
SC-L1
SC-L2
1
2
W
U
SC-W
1
Z5
R1R2R3
C3
C2
F3F2F1
Z1
Z2
R5
D1
R4
R6
C17
Diode
Bridge
C7C8C9
C10
C4
C1
C6
Power Source
3N~
50/60Hz
380/400/415V
N
L3L2L1
TB1
N
L3L2L1
L
F4
AC250V
6.3A T
black
white
red
3
1
CN3
green
TB24
N
TB23
L3
TB22
L2
TB21
L1
CN1B
4131
CN1A
UUU
F1,F2,F3
AC250V
6.3A T
U
Z4
DSA
CN2
653
1
Noise
Filter
U
ZNR01
U
+
31
CN5
red
3
CN4
blue
1
471
CNINV
CNVDC
4
1
FAN Board
F01
DC700V
4A T
C630
C631
R631
R630
IPM
CN18V
blue
CN4
red
CN5
21 1 3 12
234
1
CN21
blue
CN22
red
654
3
°
t
THBOX
LED2:Error
Fan motor
(Heat exchanger)
M
3~
V
C100
R1 R5
*5
black
red
2
43
1
72C
black
red
SC-P1
SC-P2
4
CN1
1
LED1:Normal operation(Lit)
/ Error(Blink)
CN5V
yellow
CN6
21 3 1
CN4
1
2
CN2
15271
CNTYP
black
C1
RSH1
t
°
THHS
*6
FT-P
FT-N
P
N
INV Board
+++
+
+++
+
R34
C30
C32
C34
C36
R30
R32
C31
C33
C35
C37
R31
R33
black
white
red
R35
CT3
SC-L3
IGBT
SC-U
SC-V
CT12 CT22
red white black
blackwhitered
U
V
W
MS
3~
Motor
(Compressor)
Central control
transmission
cable
Indoor/Outdoor
transmission
cable
*4
TP2TP1
TB7
SM2M1
TB3
M-NET Board
13
CN04
red
CN102
4321
CNS2
yellow
21 5432
CNIT
red
1
63H1
P
LEV2b
M
LEV2a
M
M
LEV1
12345
6
CNLVA
CNLVB
red
12345
6
54321
6
CNLVC
red
3
1
CNTYP2
black
Z24
321
Z25
CNTYP5
green
CNTYP4
green
432
1
CN213
red
CN212
2
1
TH6
TH7
TH3
t°t°t
°
213
63LS
63HS1
213
TH2
°
t
TH4
321
CN202
red
CN201
231
CN215
black
2
1
CN211
2
1
red
CNIT
yellow
CNS2
51234
OFF
ON
1234
1234
CN41
CN40
CN102
4321
CN3D
123
red
CN3S
123
blue
CN3N
123
*3
yellow
CN3K
12
CNAC
red
21 3
F01
AC250V
3.15A T
653
1
SV9
X09
X10
CN508
black
3
1
21S4a
CN504
green
X04
X03
CH11
3
1
CN503
blue
2
1
CN502
X02
1
2
CNAC2
black
6
5
72C
1
2
CN72
red
31
CNDC
pink
12
CNT01
13 12 21 21
CN801
yellow
CNT02
CN332
blue
CN4
CN2
752
1
CPU power
supply circuit
Power failure
detection circuit
Control Board
LED1
SW1
ONOFF
1
10
SW2
ONOFF
1
10
SW3
ONOFF
1
10
SW4
ONOFF
1
10
ONOFF
1
10
SW5
543
12V
1
CN51
*3
SWU2 SWU1
10's
digit
1's
digit
Unit address
setting
LED1
Display
setting
Function
setting
Compressor ON/OFF output
Error detection output
TB7 Power
selecting
connector
LED3:Lit when powered
LED2:CPU in operation
[ V Electrical Wiring Diagram ]
- 66 -
HWE08110 GB
[2] Electrical Wiring Diagram of Transmission Booster
100V/200VAC
Terminal block for power supply
(TB1)
L
Red
Red Red
White
Green
250V 5A
Grounding
Red
Red
Red
U
U
White
White White
White
White
White Blue RedRed
DSA
White
White
Blue
Red
Red
Red
Red
Varistor
Varistor
Noise filter
Stabilized power supply
4
3
2
1
1
2
3
CN2
CN1
Black
Black
Black
Black
Green/Yellow
1
2
3
E
4
Choke coil
1 2
CN3
1 2 1 2
CN4
CN2
1
2
CN1
Electronic control board
Black
White
Red
Red
Black
S
B
A
S
B
A
Terminal block 2 for
transmission line (TB3)
Expanded (indoor unit) side
Terminal block 1 for
transmission line (TB2)
Expanded (outdoor unit) side
- 67 -
HWE08110 GB
VI
Refrigerant Circuit
[1] Refrigerant Circuit Diagram ............................................................................................. 69
[2] Principal Parts and Functions .......................................................................................... 71
- 68 -
[ VI Refrigerant Circuit ]
- 69 -
HWE08110 GB
VI Refrigerant Circuit
[1] Refrigerant Circuit Diagram
1. Outdoor unit
(1) PUHY-HP200, HP250 models
SCC(HIC Circuit)
LEV1
ST1
ST2
BV2
O/S
CP1
SV1
ACC
Comp
63H
63LS
ST3
ST6
CJ1
63HS
CJ2
ST7
TH4
TH2
TH3
TH6
BV1
63HS2
LEV4
SV6
LEV2a,2b
SV9
CV1
SV2
TH7
21S4b
21S4a
SV5b
CP3
[ VI Refrigerant Circuit ]
- 70 -
HWE08110 GB
2. PUHY-HP400, HP500 models
SCC(HIC Circuit)
LEV1
ST2
BV2
O/S
CP1
SV1
ACC
Comp
63H
63LS
ST3
ST6
CJ1
63HS
CJ2
ST1
BV1
Gas
separator
Liquid
separator
ST1
BV1
ST7
TH4
TH2
TH3
TH6
63HS2
LEV4
SV6
LEV2a,2b
SV9
CV1
SV2
TH7
21S4b
21S4a
SV5b
CP3
SCC(HIC Circuit)
LEV1
ST2
BV2
O/S
CP1
SV1
ACC
Comp
63H
63LS
ST3
ST6
CJ1
63HS
CJ2
ST7
TH4
TH2
TH3
TH6
63HS2
LEV4
SV6
LEV2a,2b
SV9
CV1
SV2
TH7
21S4b
21S4a
SV5b
CP3
[ VI Refrigerant Circuit ]
- 71 -
HWE08110 GB
[2] Principal Parts and Functions
1. Outdoor unit
Part name
Symbols
(functions)
Notes Usage Specifications Check method
Compressor
MC1
(Comp1)
Adjusts the amount of circulating refrigerant by adjusting the operating
frequency based on the operating
pressure data
Low-pressure shell scroll
compressor
Wirewound resistance
20°C[68°F] : 0.161ohm
High pressure sensor
63HS1 1) Detects high pressure
2) Regulates frequency and provides high-pressure protection
Intermediate pressure sensor
63HS2 Detects intermediate pressure dur-
ing heating operation and controls
LEV2a and 2b
Low
pressure
sensor
63LS 1) Detects low pressure
2) Provides low-pressure protection
Pressure
switch
63H1 1) Detects high pressure
2) Provides high-pressure protection
4.15MPa[601psi] OFF setting
Pressure
0~4.15 MPa [601psi]
Vout 0.5~3.5V
0.071V/0.098 MPa [14psi]
Pressure [MPa]
=1.38 x Vout [V]-0.69
Pressure [psi]
=(1.38 x Vout [V] - 0.69) x 145
GND (Black)
Vout (White)
Vcc (DC5V) (Red)
Connector
63HS1
1
123
2
3
Pressure
0~1.7 MPa [247psi]
Vout 0.5~3.5V
0.173V/0.098 MPa [14psi]
Pressure [MPa]
=0.566 x Vout [V] - 0.283
Pressure [psi]
=(0.566 x Vout [V] - 0.283) x 145
GND (Black)
Vout (White)
Vcc (DC5V) (Red)
Connector
63LS
1
123
2
3
[ VI Refrigerant Circuit ]
- 72 -
HWE08110 GB
Thermistor TH4
(Discharge)
1) Detects discharge air temperature
2) Provides high-pressure protection
Degrees Celsius Resistance
check
0°C[32°F] :698kohm
10°C[50°F] :413kohm
20°C[68°F] :250kohm
30°C[86°F] :160kohm
40°C[104°F] :104kohm
50°C[122°F] : 70kohm
60°C[140°F] : 48kohm
70°C[158°F] : 34kohm
80°C[176°F] : 24kohm
90°C[194°F] :17.5kohm
100°C[212°F] :13.0kohm
110°C[230°F] : 9.8kohm
TH2 LEV 1 is controlled based on the
TH2, TH3, and TH6 values.
Degrees Celsius
0°C[32°F] :15kohm
10°C[50°F] :9.7kohm
20°C[68°F] :6.4kohm
25°C[77°F] :5.3kohm
30°C[86°F] :4.3kohm
40°C[104°F] :3.1kohm
Resistance
check
TH3
(Pipe
temperature)
1) Controls frequency
2) Controls defrosting during
heating operation
3) Detects subcool at the heat exchanger outlet and controls
LEV1 based on HPS data and
TH3 data
TH7
(Outdoor
temperature)
1) Detects outdoor air temperature
2) Controls fan operation
TH6 Controls LEV1 based on TH2, TH3,
and TH6 data.
THHS
Inverter
heat sink
temperature
Controls inverter cooling fan based
on THHS temperature
Degrees Celsius
0°C[32°F] :161kohm
10°C[50°F] :97kohm
20°C[68°F] :60kohm
25°C[77°F] :48kohm
30°C[86°F] :39kohm
40°C[104°F] :25kohm
THBOX
Control box
internal temperature detection
Part name
Symbols
(functions)
Notes Usage Specifications Check method
R = 7.465k
120
R = 4057
R =
7.465
25/120
t
4057
273 t
1
393
1
exp
R = 15k
0
R = 3460
R = 15
0/80
t
3460
273 t
1
273
1
exp
R = 17k
50
R = 4016
R = 17
25/120
t
4016
273 t
1
323
1
exp
[ VI Refrigerant Circuit ]
- 73 -
HWE08110 GB
Solenoid
valve
SV1a
Dischargesuction
bypass
1) High/low pressure bypass at
start-up and stopping, and capacity control during low-load
operation
2) High-pressure-rise prevention
AC220-240V
Open while being powered/
closed while not being powered
Continuity
check with a
tester
SV2 High/low pressure bypass at heat-
ing startup in low temperature or at
resuming operation after the completion of the defrost cycle
SV5b Controls outdoor unit heat ex-
changer capacity
SV6 Changes bypass flow path from liq-
uid pipe (or 2-phase liquid pipe) on
the outdoor unit
1) High/low pressure bypass at
heating startup in low temperature or at resuming operation
after the completion of the defrost cycle
2) Capacity control during lowload heating operation
SV9
Linear expansion
valve
LEV1
(SC control)
Adjusts the amount of bypass flow
from the liquid pipe on the outdoor
unit during cooling
DC12V
Opening of a valve driven by
a stepping motor 0-480 pulses (direct driven type)
Same as indoor LEV
The resistance
value differs
from that of the
indoor LEV.
(Refer to the
section "LEV
Troubleshooti
ng."(page 191
))
LEV2a
LEV2b
(Refrigerant
flow adjustment)
Adjusts refrigerant flow during heating
DC12V
Opening of a valve driven by
a stepping motor 60 - 2000
pulses
Same as indoor LEV
LEV4 Opening and closing control of in-
jection circuit
DC12V
Degree of stepping motor
valve closing 0 - 460 pulses
(direct driven type)
Same as LEV1
Heater CH11 Heats the refrigerant in the com-
pressor
Cord heater AC220 - 240V
CH11: 1280ohm (240V)
Resistance
check
4-way valve 21S4a Changeover between heating and
cooling
AC220 - 240V
Dead: cooling cycle
Live: heating cycle
Continuity
check with a
tester
21S4b 1) Switches between heating and
cooling
2) Controls outdoor unit heat exchanger capacity
AC220 - 240V
When not powered: cooling
cycle
Outdoor unit heat exchanger
capacity at 100%
When powered: cooling cycle
Outdoor unit heat exchanger
capacity at 50%
or heating cycle
Part name
Symbols
(fun
ctio
ns)
Notes Usage Specifications Check method
[ VI Refrigerant Circuit ]
- 74 -
HWE08110 GB
2. Indoor Unit
Part
Name
Symbol
(functions)
Notes Usage Specification Check method
Linear
expansion valve
LEV 1) Adjusts superheat at the
indoor heat exchanger
outlet during cooling
2) Adjusts subcool at the
heat exchanger outlet of
the indoor unit during
cooling
DC12V
Opening of stepping motor
driving valve 0-(1800) pulses
Refer to the section
"Continuity Test with a
Tester".
Continuity between
white, red, and orange.
Continuity between
yellow, brown, and
blue.
Thermistor
TH1
(Suction air
temperature)
Indoor unit control (Thermo)
0°C [32°F]:15kohm
10°C [50°F] :9.7kohm
20°C [68°F]:6.4kohm
25°C [77°F] :5.3kohm
30°C [86°F] :4.3kohm
40°C [104°F] :3.1kohm
Resistance check
TH2
(Pipe temperature)
1) Indoor unit control (Frost
prevention, Hot adjust)
2) LEV control during heating operation (subcool
detection).
TH3
(Gas pipe
temperature)
LEV control during cooling operation (superheat detection)
TH4
Outdoor air
temperature)
Indoor unit control (Thermo)
Temperature
sensor (Indoor air temperature)
Indoor unit control (Thermo)
Yellow
White
Red
Orange
Brown Blue
M
1
273+t
R0=15k
R
0/80
=3460
Rt =
15exp{3460( - )}
1
273
- 75 -
HWE08110 GB
VII
Control
[1] Functions and Factory Settings of the Dipswitches ......................................................... 77
[2] Controlling the Outdoor Unit ............................................................................................ 83
[3] Operation Flow Chart....................................................................................................... 94
- 76 -
[ VII Control ]
- 77 -
HWE08110 GB
VII Control
[1] Functions and Factory Settings of the Dipswitches
1. Outdoor unit
(1) Control board
1) Unless otherwise specified, leave the switch to OFF where indicated by "-," which may be set to OFF for a reason.
2) A: Only the switch on either the OC or OS needs to be set for the setting to be effective on both units.
B: The switches on both the OC and OS need to be set to the same setting for the setting to be effective.
C: The setting is effective for the unit on which the setting is made.
3) Refer to "VII [2] Controlling the Outdoor Unit" for details.(page 83)
4) The table below shows the combination of SW2-9 and SW3-5 settings and the target evaporating temperature setting that
corresponds to each combination.
Switch Function
Function according to switch setting Switch setting timing
Units that re-
quire switch
setting
Note.2
OFF ON OFF ON OC OS
SWU 1-2 Unit address setting Set to 00 or 51-100 with the dial switch Before power on C C
SW1 1-10
For self-diagnosis/operation monitoring
Refer to the LED monitor display on the
outdoor unit board.
Anytime after power on
CC
SW2
1
Centralized control
switch
Without connection to the centralized controller
With connection to
the centralized
controller
Before power on
BB
2
Deletion of connection information
Normal control Deletion Before power on
A-
3
Deletion of error history SW
(OC) Storage of IC/
OC error history
(OC) Deletion of
IC/OC error history
Anytime after power on
(When switched from OFF
to ON)
CC
(OS) Storage of OS
error history
(OS) Deletion of
OS error history
4 Pump down mode Normal control Pump down mode
After being energized and
while the compressor is
stopped
A-
5- - - - --
6- - - - --
7
Forced defrost
(Note 3)
Normal control
Forced defrost
starts
10 minutes
after compressor
startup
Anytime after power
on (When
switched
from OFF to
ON)
AA
8
Defrost timer setting
(Note 3)
50 minutes 90 minutes
Anytime after power on
(When switched from OFF
to ON)
BB
9
Target evaporating
temperature setting
Depends on the setting combination with
the SW3-5 setting (Note 4)
Anytime after power on
A-
10 - - - - - -
Switch
SW2-9
OFF ON
SW3-5
OFF 0°C [32°F] -4°C [25°F]
ON -2°C [28°F] -6°C [21°F]
[ VII Control ]
- 78 -
HWE08110 GB
1) Unless otherwise specified, leave the switch to OFF where indicated by "-," which may be set to OFF for a reason.
2) A: Only the switch on either the OC or OS needs to be set for the setting to be effective on both units.
B: The switches on both the OC and OS need to be set to the same setting for the setting to be effective.
C: The setting is effective for the unit on which the setting is made.
3) The noise level is reduced by controlling the compressor frequency and outdoor fan rotation speed.
Setting of CN3D is required.(page 24)
4) The table below shows the combination of SW2-9 and SW3-5 settings and the target evaporating temperature setting that
corresponds to each combination.
5) Refer to VII [2] Controlling the Outdoor Unit -7- Defrost Operation Control for details.(page 87)
Switch Function
Function according to switch setting Switch setting timing
Units that re-
quire switch
setting
Note.2
OFF ON OFF ON OC OS
SW3
1
Test run mode: enabled/disabled
SW3-2 disabled SW3-2 enabled Anytime after power on
A-
2
Test run mode: ON/
OFF
Stops all ICs
Sends a test-run
signal to all IC
After power on and when
SW3-1 is on.
A-
3
Defrost start temperature
-10°C [14°F] -5°C [23°F] Anytime after power on
BB
4
Defrost end temperature
10°C [50°F] 5°C [41°F]
Anytime after power on
(except during defrost operation)
BB
5
Target evaporating
temperature setting
Depends on the setting combination with
the SW2-9 setting (Note 4)
Anytime after power on
A-
6
Temperature unit
setting
°C °F Anytime after power on
CC
7
Target condensing
temperature setting
for heating
49°C [120°F] 53°C [127°F] -
A-
8- - - - --
9
Model setting
(To change the external
static pressure setting)
Outdoor standard
static pressure
Outdoor high static
pressure
Before being energized
CC
10
Model setting
(To change the external
static pressure setting)
High static pressure
60Pa
High static pressure
30Pa
Before being energized
CC
SW4
1- - - - -2- - - - --
3
Refrigerant amount
adjustment
Normal operation
mode
Refrigerant amount
adjust mode
Anytime after being energized
(except during initial startup
mode.
Automatically cancelled 90
minutes after compressor
startup)
A-
4
Low-noise mode/
step demand switching
Low-noise mode
(Note 3)
Step demand mode Before being energized
CC
5
Automatic cooling/heating switchover (IC with
the minimum address)
Normal operation
mode
Automatic cooling/
heating switchover
Before being energized
A-
6
Cumulative compressor
operation time data deletion
Cumulative compressor
operation time data is
retained.
Cumulative compressor
operation time data is
deleted.
Anytime after power on (when
the unit is turned on)
CC
7- - - - -8- - - - -9- - - - --
10 - - - - - -
Switch
SW2-9
OFF ON
SW3-5
OFF 0°C [32°F] -4°C [25°F]
ON -2°C [28°F] -6°C [21°F]
[ VII Control ]
- 79 -
HWE08110 GB
1) Unless otherwise specified, leave the switch to OFF where indicated by "-," which may be set to OFF for a reason.
2) A: Only the switch on either the OC or OS needs to be set for the setting to be effective on both units.
B: The switches on both the OC and OS need to be set to the same setting for the setting to be effective.
C: The setting is effective for the unit on which the setting is made.
3) When set to the capacity priority mode and if the following conditions are met, the Low-noise mode will terminate, and the unit
will go back into the normal operation mode.
Cooling: Outside temperature is high or high pressure is high.
Heating: Outside temperature is low or low pressure is low. (page 22)
(2) INV board
Functions are switched with the following connector.
CN6 short-circuit connector is mated with the mating connector.
Leave the short-circuit connector on the mating connector during normal operation to enable error detection and protect the
equipment from damage.
Switch Function
Function according to switch setting Switch setting timing
Units that re-
quire switch
setting
Note.2
OFF ON OFF ON OC OS
SW5
1- - - - --
2- - - - --
3- - - - --
4- - - - --
5
Low-noise mode
selection
Capacity priority
mode (Note 3)
Low-noise priority
mode
Before being energized
A-
6- - - - --
7- - - - --
8- - - - --
9- - - - --
10 Backup heating Disabled Enabled Anytime after power on A -
Connector Function
Function according to connector Setting timing
Enabled Disabled Enabled Disabled
CN6 shortcircuit con-
nector
Enabling/disabling the following error
detection functions;
ACCT sensor failure
(5301 Detail No. 115)
ACCT sensor circuit failure
(5301 Detail No. 117)
IPM open/ACCT erroneous wiring
(5301 Detail No. 119)
Detection of ACCT erroneous wiring
(5301 Detail No.120)
Error detection
enabled
Error detection
disable
(No load operation is possible.)
Anytime after power on
[ VII Control ]
- 80 -
HWE08110 GB
2. Function of the switch (Indoor unit)
(1) Dipswitches
1) SW1,3
2) SW2
SW3-1
OFF
OFF
OFF
ON
ON
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
Very Low
Low
Preset speed
Preset speed
Preset speed
Stop
Stop
Stop
−
−
−
Stop
Switch setting
SW1-7 SW1-8 Heating Cooling
Cooling-only/heat pump
Heat pump
Cooling-only
Heat pump
Fan speed during Thermo-OFF
Note 2. If both SW1-7 and SW1-8 are set to ON, the fan remains stopped during heating Thermo-OFF.
To prevent incorrect temperature detection due to a build-up of warm air around the indoor unit, use the built-in temperature sensor on the remote controller (SW1-1)
instead of the one on the indoor unit inlet thermistor.
Note 3. By setting SW3-1, SW1-7, and SW1-8 to a certain configuration, the fan can be set to remain stopped during cooling Thermo-OFF. See the table below for details.
Switch Function
Function according to switch setting
OFF ON
Switch setting timing
OFF ON
Notes
SW1
SW3
1
2
3
4
5
6
7
8
9
10
9
10
1
2
3
4
5
6
7
8
Room temperature
detection position
Clogged filter detection
Filter check reminder time setting
Outside air intake
Remote display option
Humidifier control
Self-recovery after power failure
Fan speed setting for
Heating Thermo-OFF
Power source start-stop
Unit model selection
Louver
Van e
Vane swing function
-
Vane angle limit setting
for cooling operation
Initial vane position
Heating 4°C[7.2°F] up
Automatic LEV value
conversion function
Indoor unit inlet
100h
Disabled
Fan output
2500h
Enabled
Thermo-ON signal
Built-in sensor on
the remote controller
Available
During heating operation
According to the
SW1-7 setting
Heat pump
Always on while in the heating mode
Fan speed setting for
Heating Thermo-OFF
Very Low Low
Preset speed
Cooling only
Enabled
Enabled
Disabled
Disabled Enabled
Enabled
Not available Available
Not available Available
Not available
Not available
Available
Not available
Available
Not available Available
--
---
Downblow B,C Horizontal
While the unit is stopped
(Remote controller OFF)
Always set to OFF on PKFY-AM model units
Set to ON (built-in sensor on the remote controller)
on All Fresh (PEFY-VMH-F) model units
Applicable to All Fresh model units
(PEFY-VMH-F) only
Applicable to All Fresh model units
(PEFY-VMH-F) only
Always set to OFF on PKFY-VAM model units
PLFY-VLMD model only
Set to OFF on floor-standing
(PFFY) type units
Note 1. Settings in the shaded areas are factory settings.(Refer to the table below for the factory setting of the switches whose factory settings are not indicated by the shaded cells.)
Always set to Downblow B or C on
PKFY-VAM model units
Disabled
SHm setting 2°C[3.6°F]
The setting depends on the
model and type.
The setting depends on the
model and type.
5°C[9°F]
SCm setting 10°C[18°F] 15°C[27°F]
Disabled
Forced heating operation
at OA temp of 5 C or below
123456
P204P255P326P408P50
10
ON
OFF
123456
P15
3
ON
OFF
123456
ON
OFF
123456
ON
OFF
123456
ON
OFF
123456
ON
OFF
123456
P6313P7114P8016P10020P125
25
ON
OFF
123456
ON
OFF
123456
ON
OFF
123456
ON
OFF
123456
ON
OFF
P20040P250
50
123456
ON
OFF
123456
ON
OFF
123456
P140
28
ON
OFF
Model
Capacity (model) code
SW2
setting
Note. The setting timing for SW2 is before power is turned on.
[ VII Control ]
- 81 -
HWE08110 GB
(2) Address switch
Actual indoor unit address setting varies in different systems. Refer to the installation manual for the outdoor unit for details
on how to make the address setting.
Each address is set with a combination of the settings for the 10's digit and 1's digit.
(Example)
When setting the address to "3", set the 1's digit to 3, and the 10's digit to 0.
When setting the address to "25", set the 1's digit to 5, and the 10's digit to 2.
3. Function of the switch <Remote controller>
(1) MA remote controller (PAR-20MAA)
The SW is located at the bottom of the remote controller under the cover. Operate the switches to perform the remote controller main/sub setting or other function settings. Normally, do not change the settings of switches other than the SW1 (main/
sub switching switch). (All the switches are set to "ON" at factory setting.)
The MA remote controller (PAR-21MAA) does not have the switches listed above. Refer to the installation manual for the function setting.
Remote controllerSwitching switch
1ON234
Switch
2
1
Function
Remote controller
main/sub setting
At power on of the
remote controller
Normal
startup
Timer mode
startup
3
Cooling/heating display
set by automatic setting
Displayed Not displayed
4
Suction temperature display
(discharge temperature display)
Displayed Not displayed
Operation by switch settings
Switch setting timing
ON OFF
Main Sub
Before power on
Before power on
Before power on
Before power on
When two remote controllers are connected
to one group, set either of the remote
controllers to "Sub".
When the program timer (only few stock
products are available) is connected, set to
"Timer mode startup" to resume the operation
with timer mode after power is restored.
When the automatic mode is set and the
"Cooling"/"Heating" display is not necessary,
set to "Not displayed".
When the suction temperature (discharge
temperature) display is not necessary,
set to "Not displayed".
[ VII Control ]
- 82 -
HWE08110 GB
(2) ME remote controller (PAR-F27MEA)
Set the address of the remote controller with the rotary switch.
To set addresses, use a precision slotted screw driver [2.0 mm [0.08 in] (w)], and do not apply than 19.6N.
The use of any other tool or applying too much load may damage the switch.
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
10's digit 1's digit
(left) (right)
Remote controller unit
Rotary switch
Example: In case of address 108
Address setting range Setting method
Main remote controller 101-150 Add 100 to the smallest address of all the indoor units in the
same group.
Sub remote controller 151-200 Add 150 to the smallest address of all the indoor units in the
same group.
Setting of rotary switch Address No.
01-99
*1
101-199 with the 100's digit automatically being set to 1
*2
00 200
*1. At factory shipment, the rotary switch is set to 01.
*2. The address range that can be set with the ME remote controller is between 101 and 200. When the dials are set to
a number between 01 and 99, the 100's digit is automatically set to [1]. When the dials are set to 00, the 100's digit is
automatically set to [2].
[ VII Control ]
- 83 -
HWE08110 GB
[2] Controlling the Outdoor Unit
-1- Outline of Control Method
The outdoor units are designated as OC and OS in the order of capacity from large to small (if two or more units have the
same capacity, in the order of address from small to large).
The setting of outdoor unit can be verified by using the self-diagnosis switch (SW1).
The OC determines the operation mode and the control mode, and it also communicates with the indoor units.
The OS exercises autonomous distributed control (over defrost, error detection, and actuator control etc.) according to the
operation/control mode signals that are sent from the OC.
-2- Startup sequence rotation
At the initial startup, outdoor units start up in the order of "OC to OS". After two or more hours of OC operation, the startup
sequence changes to "OS to OC". In addition, after two or more hours of OS operation, the startup sequence changes to "OC
to OS".
Startup sequence rotation is performed while all the indoor units are stopped. (Even after two hours of operation, startup se-
quence rotation is not performed while the compressor is in operation.)
Refer to [-11-Control at Initial Start-up] for the initial startup.
Performing startup sequence rotation does not change the basic operation of OC and OS. Only startup sequence is changed.
Startup sequence of the outdoor units can be checked with the self-diagnosis switch (SW1) on the OC.
-3- Initial Control
When the power is turned on, the initial processing of the microcomputer is given top priority.
During the initial processing, control processing of the operation signal is suspended. (The control processing is resumed after
the initial processing is completed. Initial processing involves data processing in the microcomputer and initial setting of each
of the LEV opening. This process will take up to 5 minutes.)
During the initial processing, the LED monitor on the outdoor unit's control board displays S/W version -> refrigerant type
-> heat pump -> cooling only and capacity -> and communication address in turn every second.
-4- Control at Start-up
The upper limit of frequency during the first 3 minutes of the operation is 50 Hz.
When the power is turned on, normal operation will start after the initial start-up mode (to be described later) has been com-
pleted (with a restriction on the frequency).
Display
SW1
ON
1 2 3 5 4 6 7 8 9 10
The unit is designated as the OC: “oc” appears on the display.
The unit is designated as OS: “oS” appears on the display
Display SW1
OC→OS: “oc” and the “OC” address appear alternately on the display.
OS→OC: “oS” and the “OS” address appear alternately on the display.
ON
1 2 3 5 4 6 7 8 9 10
[ VII Control ]
- 84 -
HWE08110 GB
-5- Bypass Control
Solenoid valves are categorized into 3 types: High/low pressure bypass valve (SV1a), High/low pressure bypass valve via
heat exchanger (SV9), and circuit switch valve at subcool coil low pressure side (SV6). Refer to the following tables for each
valve operation.
(1) Bypass solenoid valve (SV1a) (ON = Open)
(2) Bypass solenoid valve (SV2) (ON = Closed)
Operation
SV1a
ON OFF
At NO1 compressor startup (outdoor temperature: -15°C[5°F] or more) or at NO2
compressor startup (HP400/HP500 models)
ON for 4 minutes
ĺ OFF
After resuming operation after the completion of the defrost cycle
ON for 8 minutes
ĺ OFF
After NO1 compressor startup (outdoor temperature: -15°C[5°F] or lower) or after resuming operation after the completion of the
defrost cycle (outdoor temperature:
-15°C[5°F] or lower)
ON when 25 minutes or less have
passed and 63HS1 or 2 < 1.96MPa
[284 psi].
OFF when 25 minutes or more
have passed or 63HS1 or 2
1.96MPa [284 psi].
After resuming operation after Themo mode
or after 3-minute restart delay mode
ON for 4 minutes
ĺ OFF
When the compressor stops at cooling/heating mode
Always ON.
Exception: OFF when 63HS1 or 2 -63LS is 0.2 MPa [29 psi] or less
After the operation has stopped ON for 3 minutes.
Exception: OFF when 63HS1 or 2 -63LS is 0.2 MPa [29 psi] or less
During defrost cycle ON
During oil recovery operation OFF during oil recovery operation (cooling/heating) after low frequency
continuous operation.
During cooling operation, during compressor frequency Fmin operation, or when low
pressure (63LS) drops (3 minutes have
passed since startup)
When low pressure (63LS) drops
below 0.23 MPa [33 psi].
When low pressure (63LS) rises
above 0.38MPa [55 psi].
During heating operation and when low
pressure (63LS) drops (3 minutes have
passed since start up and resuming operation after the completion of the defrost cycle
.)
When low pressure (63LS) drops
below 0.12 MPa [17 psi].
3 minutes have passed since ON
control started, and when low pressure (63LS) drops below 0.16MPa
[23 psi].
When high pressure (63HS1 or 2) rises When 63HS1, 63HS2 exceeds
3.62 MPa [525 psi].
When 63HS1, 62HS2 are or below
3.43 MPa [497 psi] and 30 seconds
have passed since ON control
started.
Operation
SV2
ON OFF
At NO1 compressor startup (outdoor temperature: 5°C[41°F] or lower) or after resuming operation after the completion of the
defrost cycle
ON when 5 minutes or less have
passed and 63HS1 < 1.96MPa
[284 psi].
OFF when 5 minutes or more have
passed or 63HS1 1.96MPa [284
psi].
[ VII Control ]
- 85 -
HWE08110 GB
(3) Bypass solenoid valve (SV6) (ON = Open)
If outdoor temperature (TH7) during heating operation is between 3°C[37°F] and 5°C[41°F] , ON or OFF.
(4) Bypass solenoid valve (SV9) (ON = Open)
Operation
SV6
ON OFF
During cooling operation ON
During heating operation (outdoor temperature (TH7) is 5°C[41°F] and above)
Always ON except for the defrost cycle.
During heating operation (outdoor temperature (TH7) is 3°C[37°F] or below)
OFF when 1 minute has passed since compressor startup.
Operation
SV9
ON OFF
After resuming operation after the completion of the defrost cycle
ON for 5 minutes.
At NO1 compressor startup (outdoor temperature: -15°C[5°F] or lower) or after resuming operation after the completion of the
defrost cycle(outdoor temperature:
-15°C[5°F] or lower)
ON when 5 minutes or less have
passed and 63HS1 or 2 < 1.76MPa
[255 psi].
OFF when 5 minutes or more have
passed or 63HS1 or 2 1.76MPa
[255 psi].
When the compressor stops at cooling/heating mode
OFF
During heating operation, during compressor frequency Fmin operation, and when
high pressure (63HS1 or 2) rises
When 63HS1, 63HS2 exceeds
3.43 MPa [497 psi].
When 30 seconds have passed,
compressor frequency Fmin +10 or
more, and 2.65MPa [384 psi] or
less.
[ VII Control ]
- 86 -
HWE08110 GB
-6- Compressor Frequency Control
Depending on the capacity required, the frequency of the compressor is controlled to keep constant evaporation temperature
(0°C [32°F] = 0.71 MPa [103 psi]) during cooling operation, and condensing temperature (49°C [120°F] = 2.88 MPa [418 psi])
during heating operation.
The table below summarizes the operating frequency ranges of the inverter compressor during normal operation..
The maximum frequency during heating operation is affected by the outdoor air temperature to a certain extent.
(1) Pressure limit
The upper limit of high pressure (63HS1) is preset, and when it exceeds the upper limit, the frequency is decreased every 15
seconds.
The actuation pressure is when the high-pressure reading on 63HS1 is 3.58MPa[519psi].
(2) Discharge temperature limit
Discharge temperature (TH4) of the compressor in operation is monitored, and when it exceeds the upper limit, the frequency
is decreased every minute.
Operating temperature is 115°C [239°F].
(3) Periodic frequency control
Frequency control other than the ones performed at start-up, upon status change, and for protection is called periodic frequency control (convergent control) and is performed in the following manner.
Periodic control cycle
Periodic control is performed after the following time has passed
30 seconds after either compressor start-up or the completion of defrost operation
30 seconds after frequency control based on discharge temperature or pressure limit
The amount of frequency change
The amount of frequency change is controlled to approximate the target value based on the evaporation temperature (Te) and
condensing temperature (Tc).
Model
Frequency/cooling (Hz) Frequency/heating (Hz)
Max Min Max Min
200 model 50 15 93 15
250 model 64 15 120 15
[ VII Control ]
- 87 -
HWE08110 GB
-7- Defrost Operation Control
(1) Starting the defrost operation
The defrost cycle starts when outdoor temperature, integrated operation time of compressor, and piping temperature are met
for every range of <condition 1> through <condition 3>.
Defrost cycle does not start while other outdoor units are defrosting or 10 minutes have not passed since resuming operation
after the completion of the defrost cycle.
If 10 minutes have passed since compressor start-up or since the completion of defrost operation, forced defrost operation
will start by turning on the forced defrost switch (DIP SW2-7).
Even if the defrost-prohibit timer is set to 90 minutes or 150 minutes <condition 3>, the actual defrost-prohibit time for the next
defrost cycle is 50 minutes if the last defrost cycle took 12 minutes.
In the multiple-outdoor-unit system, all of the outdoor units that are in operation go into the defrost mode simultaneously. The
unit(s) that is stopped at the time defrost operation starts remains stopped.
(2) Defrost operation
(3) Stopping the defrost operation
The defrost cycle ends when 12 minutes have passed since the beginning of the cycle, or when the pipe temperature (TH3)
is 10°C[50°F] or above has been continuously detected for 2 minutes.
The defrost cycle does not end for 2 minutes once started unless the pipe temperature exceeds ǩ below within 2 minutes.
25°C (ǩ = Outdoor temperature(TH7) - 25)°C 5°C [77°F (ǩ = Outdoor temperature(TH7) - 45)°F 41°F]
In the multiple-outdoor-unit system, defrosting is stopped on all units at the same time.
(4) Problems during defrost operation
If a problem is detected during defrost operation, the operation will be stopped, and the defrost prohibition time based on the
integrated compressor operation time will be set to 20 minutes.
(5) Change in the number of operating indoor units during defrost operation
Even when there is a change in the number of operating indoor units during defrost operation, the operation will continue, and
an adjustment will be made after the completion of the defrost operation.
Defrost operation will be continued, even if the indoor units stop or under the Thermo-OFF conditions until it has run its course.
<condition 1> <condition 2> <condition 3>
Outdoor temperature (TH7) - 5°C [23°F] and above - 5°C [23°F] or below
Integrated operation time of
compressor
When 50 minutes have passed (90 minutes when the defrost-prohibit timer is set to 90 minutes).
When 250 minutes have
passed
Piping temperature (TH3) At or below -10°C [14°F] for
3 minutes
Or {(1.5+0.02 TH7>63LS)
for 3 minutes
Outdoor temperature (TH7)
is at or below -5°C [23°F] for
3 minutes
Or {(1.5+0.02 TH7>63LS)
for 3 minutes.
At or below -10°C [14°F] for
3 minutes
Compressor frequency Model Compressor frequency
HP200 model 65Hz when outdoor air is -5°C[23°F] or more
60Hz when outdoor air is below -5°C[23°F]or less
HP250 model
Outdoor unit fan Stopped
SV1a ON
SV2 OFF
SV5b ON
SV9 OFF
21S4a,21S4b OFF
LEV1 200 pulses
LEV2a , LEV2b 1400 pulses
LEV4 460 pulses
[ VII Control ]
- 88 -
HWE08110 GB
-8- Refrigerant Recovery Control
Recovery of refrigerant is performed during heating operation to prevent the refrigerant from accumulating inside the unit while
it is stopped (unit in fan mode), or inside the indoor unit that is in cooling mode or in heating mode with thermo off. It is also
performed during cooling operation to prevent an excessive amount of refrigerant from accumulating in the outdoor heat exchanger.
It is also performed during cooling operation to prevent an excessive amount of refrigerant from accumulating in the outdoor
heat exchanger.
(1) During heating operation
Starting refrigerant recovery mode
The refrigerant recovery mode in heating starts when all of the following three conditions are met:
15 minutes have passed since the completion of previous refrigerant recovery.
TH4 > 115°C [239°F]
Frequencies below 50 Hz
Refrigerant recovery
1) Refrigerant is recovered with the LEV on the applicable indoor unit (unit under stopping mode, fan mode, cooling, heating with
thermo off) being opened for 30 seconds.
2) Periodic capacity control of the outdoor units and periodic LEV control of the indoor units will be suspended during refrigerant
recovery operation; they will be performed after the recovery has been completed.
(2) During cooling operation
Starting refrigerant recovery mode
The refrigerant recovery mode starts when all the following conditions are met:
30 minutes have passed since the completion of previous refrigerant recovery.
When the unit keeps running for 3 minutes in a row or more with high discharge temperature
TH4 > 105°C [221°F] or 63HS1 > 3.43 MPa [497 psi] (35 kg/cm
2
G) and SC0 > 10°C [18°F]
Refrigerant recovery
The opening of LEV1 is increased and periodic control begins again.
-9- Capacity Control of Outdoor Fan and Heat Exchanger
(1) Control method
Depending on the capacity required, the rotation speed of the outdoor unit fan is controlled by the inverter, targeting a constant
evaporation temperature of (0°C [32°F]= 0.71 MPa [103 psi]) during cooling operation and constant condensing temperature
of (53°C [127°F]= 3.17 MPa [460 psi]) during heating operation.
The OS in the multiple-outdoor-unit system operates at the actual outdoor unit fan control value that is calculated by the OS
based on the preliminary outdoor unit fan control value that the OC determines.
(2) Control
Outdoor unit fan stops while the compressor is stopped (except in the presence of input from snow sensor).
The fan operates at full speed for 5 seconds after start-up.(Only when TH7<0°C [32°F])
The outdoor unit fan stops during defrost operation.
Opening of LEV during refrigerant recovery
Opening of indoor unit LEV: 400 pulses
Initial opening of LEV
Start
Finish
30 seconds
[ VII Control ]
- 89 -
HWE08110 GB
-10- Linear expansion valve control
Linear expansion valve performs in each operation mode as shown in the table below.
Refrigerant flow amount to the injection is controlled by intermediate pressure control or compressor discharge superheat control.
If outdoor temperature (TH7) is between 3°C[37°F] and 5°C[41°F] during heating operation, either 5°C[41°F] and above performance or 3°C[37°F] or below performance based on the table above starts.
Linear expansion valve performs as shown in the table below while the compressor is stopped or during Thermo-OFF
(1) Subcool coil control
Subcool coil is performed individually on the OC and OS.
Subcool amount at the heat exchanger outlet of the outdoor unit calculated by high pressure (63HS1) and liquid pipe temper-
ature (TH3) or superheat amount calculated by low pressure (63LS) and subcool coil bypass outlet temperature (TH2) is adjusted to be in the certain range every 30 seconds.
Valve opening is corrected based on the subcool coil inlet/outlet temperature (TH3, TH6), high pressure (63HS1), and dis-
charge temperature (TH4).
(2) Compressor discharge superheat control
Compressor discharge superheat is performed individually on the OC and OS.
Compressor discharge superheat control adjusts compressor discharge superheat that is calculated by compressor dis-
charge temperature (TH4) and high pressure (63HS1) to be in the certain range as shown in the table below every 30 seconds.
(3) Intermediate pressure control
OC interlocks with OS and performs intermediate pressure control. However, valve opening of OC and OS differs depending
on refrigerant amount of each outdoor unit.
Intermediate pressure control adjusts intermediate pressure of OC (HPS2) to be in the certain range (target: 1.3 MPa [189
psi]) every 30 seconds.
Linear expansion valve During cooling operation
During heating operation
Outdoor temperature
5°C[41°F] and above
Outdoor temperature
3°C[37°F] or below
LEV1 Subcool coil control Fully closed (0) Compressor discharge
superheat control
LEV2a,LEV2b Fully open (1400) Intermediate pressure control Intermediate pressure control
LEV4 Fully closed (0) Fully closed (0) Fully closed (460)
Linear expansion valve While compressor is stopped Cooling Thermo-OFF Heating Thermo-OFF
LEV1 65 From 0 to 65 in 3 minutes
(stays 0 while other out-
door units are in operation)
From 0 to 65 in 3 minutes
(stays 0 while other out-
door units are in operation)
LEV2a,LEV2b 200 or 1400 60 or 130 60
LEV4 Fully closed (0) Fully closed (0) Fully closed (0)
Compressor frequency Compressor discharge superheat target value
93Hz min 20
83 - 92Hz 25
72 - 82Hz 30
71Hz max 40
[ VII Control ]
- 90 -
HWE08110 GB
-11- Control at Initial Start-up
When started up for the first time before 12 hours have elapsed after power on, the unit goes into the initial startup mode.
At the completion of the initial operation mode on the OC, OS, they will go into the normal control mode.
1. Flowchart of initial operation
(1) HP200, HP250 models
(2) HP400, HP500 models
*1 Qj:Total capacity (models) code
Refer to the VII [1] 2. (1) Dipswitches for the capacity code.(page 80)
50 F 60Hz
or F < 50Hz
Initial startup mode starts.
Completed in the integrated operation time of 35 minutes.
Initial startup mode complete
Completed in the integrated operation time of 90 minutes.
Yes
No
50 F 60Hz (both OC and OS)
or F < 50Hz (both OC and OS)
Completed in the integrated operation time of 35 minutes.
Completed in the integrated operation time of 90 minutes.
The compressor on the OC remains in operation, and the
compressor on the OS starts up.
50 F 60Hz (OC)
or F < 50Hz (OC)
Completed in the integrated operation time of 35 minutes.
Completed in the integrated operation time of 90 minutes.
The compressor on the OC starts up.
Both the OC and OS stop.
The startup sequence of the OC and OS is rotated.
50 F 60Hz (OS)
or F < 50Hz (OS)
Completed in the integrated operation time of 35 minutes.
Completed in the integrated operation time of 90 minutes.
The compressor on the OS starts up.
*2
*3
*2
The air conditioning load is too small
for both the OC and the OS to
simultaneously stay in operation.
*3
The air conditioning load is
high enough for both OC and OS to
simultaneously stay in operation.
Initial startup mode complete
The compressor on the OC starts up.
The total operating load of the indoor unit
after 5 minutes of operation is P250 or above.
(
*1
Qj 50)
Initial startup mode starts.
F 60Hz
[ VII Control ]
- 91 -
HWE08110 GB
-12- Emergency Operation Mode
1. Problems with the outdoor unit
HP400 and HP500 models operate in emergency operation mode when one of the outdoor unit is trouble or when one or two
of the outdoor units are in trouble. The outdoor unit, which is not in trouble, operates in this mode.
This mode can be started by performing an error reset via the remote controller.
(1) Starting the emergency operation
1) When an error occurs, the error source and the error code will be displayed on the display on the remote controller.
2) The error is reset using the remote controller.
3) If an error code appears that permits an emergency operation in step 1) above, (See the table below.), the retry operation
starts.
4) If the same error is detected during the retry operation (step 3 above), an emergency operation can be started by resetting
the error via the remote controller.
Error codes that permit an emergency operation (Applicable to both OC and OS)
Emergency operation pattern (2 outdoor units)
Trouble source
Error codes that permit an
emergency operation
Error code description
Serial communication error
Bus voltage drop
Heatsink overheat protection
Overload protection
Overcurrent relay trip
Heatsink temperature sensor failure (THHS)
Current sensor/circuit failure
Subcool heat exchanger bypass outlet temperature sensor failure
Pipe temperature sensor failure
Discharge temperature sensor failure
Accumulator inlet temperature sensor failure
Subcool heat exchanger liquid outlet sensor failure
Outside air temperature sensor failure
Open phase
Power supply sync signal abnormality
0403
4220, 4225
4230
4240
4250, 4255
5110
5301
5102
5103
5104
5105
5106
5107
4102
4115
Compressor
Fan motor
Inverter
Thermistor
Power
TH2
TH3
TH4
TH5
TH6
TH7
OC
OC failure
pattern
Trouble
Normal
Permitted Permitted
Permitted Permitted
60%
Cooling
Heating
Normal
Trouble
OS failure
pattern
OS
Emergency
operation
Maximum total capacity
of indoor units (Note 1)
(Note 1) If an attempt is made to put into operation a group of indoor units whose total capacity exceeds the maximum allowable capacity,
some of the indoor units will go into the same condition as Thermo-OFF.
Loading...