Mitsubishi PUH-8YKA, PUH-10YKA Service Manual

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Page 1

TECHNICAL & SERVICE MANUAL

[Model names]

PUH-8YKA PUH-10YKA

No.HWE07040

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

CONTENTS

COMBINATION OF INDOOR AND OUTDOOR UNITS

···2

2. SAFETY FOR USE ·········································3

3. SAFETY PRECAUTIONS·······························5

4. DATA ·······························································7

5. SOUND DATA ·················································8

6. OUTLINES AND DIMENSIONS ······················9

7. WIRING DIAGRAM·······································10

8. REFRIGERANT SYSTEM DIAGRAM ···········11

9. SYSTEM CONTROL·····································12

10. TEST RUN·····················································14

11. CONTROL ·····················································16

12. GROUP CONTROL ·······································29

13.

NOTES FOR M-NET <MELANS> WIRING CONNECTION

····30

14. EMERGENCY OPERATION ··························32

15.

SELF-DIAGNOSIS AND TROUBLESHOOTING

···34

16. SIMPLE PARTS CHECK METHOD··············45

17. PARTS NAME ···············································46

18. OPTIONAL PARTS ·······································48

July 2007

Page 2

1 COMBINATION OF INDOOR AND OUTDOOR UNITS

Types of connected indoor units

Outdoor Unit List

Outdoor unit

PUH-8YKA

PUH-10YKA

Model name Service manual No.

PEH-8GA

PEH-16GA PEH-10GA

PEH-20GA

Specification

Model name

PUH-8YKA

PUH-10YKA

PUH-8YKA.TH

PUH-10YKA.TH

Indoor unit

HWE07030

Standard Salt-resistant

PUH-8YKA.TH-BS

PUH-10YKA.TH-BS

Page 3

2 SAFETY FOR USE

Before conducting installation work, please read this ''SAFETY FOR USE'' carefully

for

correct installation.

Since the caution items shown here contain important description relative to safety, please

observe them without fail.

After reading, please keep it with you together the Instruction Manual, and read it again at the

movement of the unit.

The unit should not be installed by the user.

If the unit is installed improperly, explosion, water leakage, electric shock or fire may be result. Consult your dealer or specialist subcontractor for repair and movement.

For installation, conduct the work correctly by following the Installation Manual.

Improper installation may cause a fire, electrical shock or water leakage.

Install the unit on a spot sufficiently durable against the unit weight.

Insufficient durability can cause an injury by the falling down of unit.

All electric work must be performed by licensed technician, according to local regulations and the instructions given in this manual.

The units should be powered by dedicated power lines. Power lines with insufficient capacity or improper electrical work may result in electric shock or fire.

Use only the specified cables for wiring. The connections must be made secured without tension the terminals.

Improper connection or fastening can cause a fire or electrical shock.

The unit should be installed according to the instructions in order to minimize the risk of damage from earthquakes, typhoons or strong winds.

Improper installation work can cause an injury by the falling down of the unit.

The outdoor unit must be installed on stable, level surface, in a place where there is no accumulation of snow , leaves or rubbish. The outdoor unit should be installed in a location where air and noise emitted by the unit will not disturb the neighbors. The indoor unit should be securely installed.

When installing or relocating the unit, make sure that no substance other than the specified refrigerant enters the refrigerant circuit. Any presence of foreign substance such as air can cause abnormal pressure rise or explosion.

If the unit is loosely mounted, it may fall, and cause injury.

Never repair the unit, remodel or transfer it to another site by yourself.

If they are performed improperly, water leakage, electric shock or fire may result. If you need to have the unit repaired or moved, consult your dealer.

Use only the specified refrigerant (R-22) to charge the refrigerant circuit. Do not mix it with any other refrigerant and do not allow air to remain in the circuit.

Air enclosed in the circuit can cause high pressure resulting in a rupture and other hazards.

Ventilate the room if refrigerant leaks during Installation.

The refrigerant heated generates poisonous gas by decomposition which can cause poisoning.

After completing installation work, make sure that refrigerant gas has not leaked.

If refrigerant gas has leaked and exposed to fan heater, stove, oven and so on, it may generate noxious gases.

Take a proper measure to suppress the critical concentration of refrigerant if leaked when installing the unit in a small room.

The limit density is made not to be exceeded even if the refrigerant leaks by any chance. You are necessary to ventilation measures to prevent the accident. If the refrigerant leaks, hypoxia accident may caused. For the countermeasure to be taken, consult your dealer.

The terminal block cover of unit must be firmly attached to prevent entry of dust and moisture.

Improper mounting of the cover cause electric shock or fire.

Use only optional parts authorised by Mitsubishi Electric.

If the accessories are installed improperly, water leakage, electric shock or fire may result. Ask your dealer or an authorised company to install them.

Erroneous handling gives a high possibility to induce serious results such as

death or heavy injury.

Erroneous handling may induce serious injury depending on the situation.

Warning

Caution

Page 4

Caution

Never install on the place where a combustible gas might leak.

The gas may ignite or explode when the gas leaks and collects in surrounding of the unit.

When the unit is installed at telecommunication centers or hospitals, take a proper provision against noise.

The erroneous operation of air conditioner may be induced by inverter equipment, independent power device, medical equipment or communication equipment. While the erroneous operation of medical equipment or communication equipment may caused by the air conditioner.

For special use as for foods, animals/plants, precision equipment or art objects, the applicability should be confirmed beforehand.

As the use for the applications other than that designed originally may result in the deterioration of the quality. Consult your dealer in this regard.

Do not use the unit under a special atmosphere.

Installing the unit at the following places may cause a trouble, a place where much machine oil, salt sonnet, humidity or dust, spa district, a place full of sulfur gas, volatile gas, or corrosive gas, a place near high frequency processing machine.

Thermal insulation of the drain pipes is necessary prevent dew condensation.

If the drain pipes are not properly insulated, condensation will result and drip on ceiling, floor or other possessions.

The drain piping must process by surely,and insulate the drain piping not to be dewy.

When the room humidity exceeds 80% or when the drain pipe is clogged, water may drip from the indoor unit. The outdoor unit produces condensation during the heating operation. Make sure to provide drainage around the outdoor unit if such condensation is likely to cause damage.

Install drain piping according to this Installation Manual to ensure proper drainage. Place thermal insulation on the pipes to prevent condensation.

Improper drain piping may cause water leakage and damage to furniture or other possessions.

The unit must be properly earth connected.

Do not connect the earth wire to gas pipe, city water pipe, lightning rod or telephone earth wire. Improper earth connection may cause electrical shock.

When installing at a watery place, provide an electric leak breaker.

Failure to mount the electric leak breaker may cause electrical shock.

Use breaker or fuse with proper capacity. Make sure that there is a main power switch.

Using a wire or a copper wire instead of proper capacity of fuse can cause fire or trouble. Other appliances connected to the same line could cause an overload.

For the power lines, use standard cables of sufficient current capacity.

Otherwise, current leakage, overheating or fire may occur.

When installing the power lines, do not apply tension to the cables.

The tighten or loosen the connections may cause generate heat and cause fire.

Remote controller is not pushed with the thing sharpening ahead.

It occasionally causes the electric shock and the breakdown.

Arrange the configuration of wiring not to bring up the panel and terminal cover, and fasten the panel and terminal cover securely.

The poor mounting of the panel or terminal cover may cause the heat generation of the terminal connection, a fire or electrical shock.

Do not wash the unit with water.

If washed with water, electrical shock may be caused.

Do not handle the switch with wet hands.

Otherwise electrical shock can be resulted.

Be very careful on handling the unit.

When carrying in outdoor unit, be sure to support it at four points. Carrying in and lifting with 3-point support may make outdoor unit unstable, resulting in a fall of it. The unit should not be carried by only one person if it is more than 20kg. Some units use PP bands for packing. Do not use any PP band for delivery purpose. Do not touch the heat exchanger fins with your bear hands. Doing so may cut your hands. Be sure to safely dispose the packaging materials. Packaging materials, such as catches and other metal or wooden parts, may cause stabs or other injuries. Tear off and discard plastic packing bags so that children will not play any of them. If children play with a plastic bag which was not torn off, it may cause a risk of suffocation.

Do not leave the mounting base being damaged.

The damaged base may cause the falling down of the unit which may give injury.

Turn on the main power switch more than 6 hours before starting operation.

Do not turn the main power switch OFF during seasons of heavy use, doing so can result in failure.

Do not touch the compressor or refrigerant piping without wearing glove on your hands.

Touching directly such part can cause a burn or frostbite as it becomes high or low temperature according to the refrigerant state.

Do not touch the metal edges inside the unit without wearing glove on your hands.

Touching directly it may injure your hands.

Do not remove the panel or the fan guard from the outdoor unit when it is running.

You could be injured if you touch rotating, hot or highvoltage parts.

Do not operate the air conditioner without the air filter set place.

Dust may accumulate, and cause a failure.

At emergency (if you smell something burning), stop operation and turn the power source switch off.

Continuing the operation without eliminating the emergency state may cause a machine trouble, fire, or electrical shock.

After stopping operation, be sure to wait for five minutes before turning off the main power switch.

Otherwise, water leakage or unit failure may occur.

Remote controller is not installed for the place where direct sunshine strikes.

Page 5

3 SAFETY PRECAUTIONS

3-1.

s Before installing the unit, make sure you read all the “Safety

precautions”.

s The “Safety precautions” provide very important points re-

garding safety. Make sure you follow them.

Symbols used in the text

Warning:

Describes precautions that should be observed to prevent danger of injury or death to the user.

Caution:

Describes precautions that should be observed to prevent damage to the unit.

Symbols used in the illustrations

: Indicates an action that must be avoided. : Indicates that important instructions must be followed. : Indicates a part which must be grounded. : Beware of electric shock. <Color: yellow>

Warning:

Carefully read the labels affixed to the unit.

Warning:

• Ask the dealer or an authorized technician to install the air conditioner.

- Improper installation by the user may result in water leakage, electric shoc k, or fire.

• Install the unit at a place that can withstand its weight.

- Inadequate strength may cause the unit to fall down, resulting in injuries.

• Use the specified cables for wiring. Make the connections securely so that the outside force of the cable is not applied to the terminals.

- Inadequate connection and fastening may generate heat and cause a fire.

• Prepare for strong winds and earthquakes and install the unit at the specified place.

- Improper installation may cause the unit to topple and result in injury.

• Always use an filter and other accessories specified by Mitsubishi Electric.

- Ask an authorized technician to install the accessories. Improper installation

by the user may result in water leakage, electric shock, or fire.

• Never repair the unit. If the air conditioner must be repaired, consult the dealer.

- If the unit is repaired improperly, water leakage, electric shock, or fire may

result.

• Do not touch the heat exchanger fins and metal edges.

- Improper handling may result in injury.

• If refrigerant gas leaks during installation work, ventilate the room.

- If the refrigerant gas comes into contact with a flame, poisonous gases will

be released.

• Install the air conditioner according to this Installation Manual.

- If the unit is installed improperly, water leakage, electric shock, or fire may

result.

• Have all electric work done by a licensed electrician according to “Elec- tric Facility Engineering Standard” and “Interior Wire Regulations”and the instructions given in this manual and always use a special circuit.

- If the power source capacity is inadequate or electric work is performed im-

properly, electric shock and fire may result.

• Securely install the terminal cover (panel).

- If the terminal cover (panel) is not installed properly, dust or w ater ma y enter

the outdoor unit and fire or electric shock may result.

• When installing and moving the air conditioner to another site, do not charge the it with a refrigerant different from the refrigerant (R22) specified on the unit.

- If a different refrigerant or air is mixed with the original refrigerant, the refrig-

erant cycle may malfunction and the unit may be damaged.

• If the air conditioner is installed in a small room, measures must be taken to prevent the refrigerant concentration from exceeding the safety limit even if the refrigerant should leak.

- Consult the dealer regarding the appropriate measures to prevent the safety

limit from being exceeded. Should the refrigerant leak and cause the safety limit to be exceeded, hazards due to lack of oxygen in the room could result.

• When moving and reinstalling the air conditioner, consult the dealer or an authorized technician.

- If the air conditioner is installed improperly, w ater leakage, electric shoc k, or

fire may result.

• After completing installation work, make sure that refrigerant gas is not leaking.

- If the refrigerant gas leaks and is exposed to a fan heater, stove, oven, or

other heat source, it may generate noxious gases.

• Do not reconstruct or change the settings of the protection devices.

- If the pressure switch, thermal switch, or other protection device is shorted and operated forcibly, or parts other than those specified by Mitsubishi Electric are used, fire or explosion may result.

• To dispose of this product, consult your dealer.

• The installer and system specialist shall secure safety against leakage

according to local regulation or standards.

- Following standards may be applicable if local regulation are not available.

• Pay a special attention to the place, such as a basement, etc. where refrigeration gas can stay, since refrigeration is heavier than the air.

• The appliance is not intended for use by young children or infirm persons without supervision.

• Young children should be supervised to ensure that they do not play with the appliance.

• Never operate in open phase condition. Control box may be broken.

3-2. BEFORE INSTALLATION

Caution:

• Do not install the unit where combustible gas may leak.

- If the gas leaks and accumulates around the unit, an explosion may result.

• Do not use the air conditioner where food, pets, plants, precision instruments, or artwork are kept.

- The quality of the food, etc. may deteriorate.

• Do not use the air conditioner in special environments.

- Oil, steam, sulfuric smoke, etc. can significantly reduce the performance of

the air conditioner or damage its parts.

• When installing the unit in a hospital, communication station, or similar place, provide sufficient protection against noise.

- The inverter equipment, private power generator, high-frequency medical

equipment, or radio communication equipment may cause the air conditioner to operate erroneously, or fail to operate. On the other hand, the air conditioner may affect such equipment by creating noise that disturbs medical treatment or image broadcasting.

• Do not install the unit on a structure that may cause leakage.

- When the room humidity exceeds 80 % or when the drain pipe is clogged,

condensation may drip from the indoor unit. P erform collective drainage work together with the outdoor unit, as required.

3-3.

Caution:

• Ground the unit.

- Do not connect the ground wire to gas or water pipes, lightning rods, or

telephone ground lines. Improper grounding may result in electric shock.

• The reverse phase of L lines (L

1, L2, L3) can be detected (Error cord: 4103),

but the reverse phase of L lines and N line can be not be detected.

- Some electric parts should be damaged when power is supplied under the

miss wiring.

• Install the power cable so that tension is not applied to the cable.

- Tension may cause the cable to break and generate heat and cause a fire.

• Install an leak circuit breaker, as required.

- If an leak circuit breaker is not installed, electric shock may result.

• Use power line cables of sufficient current carrying capacity and rating.

- Cables that are too small may leak, generate heat, and cause a fire.

• Use only a circuit breaker and fuse of the specified capacity.

- A fuse or circuit breaker of a larger capacity or a steel or copper wire may

result in a general unit failure or fire.

• Do not wash the air conditioner units.

- Washing them may cause an electric shock.

• Be careful that the installation base is not damaged by long use.

- If the damage is left uncorrected, the unit may fall and cause personal injury

or property damage.

• Install the drain piping according to this Installation Manual to ensure proper drainage. Wrap thermal insulation around the pipes to prevent condensation.

- Improper drain piping may cause water leakage and damage to furniture

and other possessions.

• Be very careful about product transportation.

- Only one person should not carry the product if it weighs more than 20 kg.

- Some products use PP bands for packaging. Do not use an y PP bands f or a

means of transportation. It is dangerous.

- Do not touch the heat exchanger fins. Doing so may cut your fingers.

- When transporting the outdoor unit, suspend it at the specified positions on

the unit base. Also support the outdoor unit at four points so that it cannot slip sideways.

• Safely dispose of the packing materials.

- Packing materials, such as nails and other metal or wooden parts, may cause

stabs or other injuries.

- Tear apart and throw away plastic packaging bags so that children will not

play with them. If children play with a plastic bag which was not torn apart, they face the risk of suffocation.

BEFORE INSTALLATION AND ELECTRIC WORK

BEFORE INSTALLATION (MOVED) ELECTRICAL WORK

Page 6

• Remote controller is not allowed to install for the place where direct sunshine strikes.

3-4. BEFORE STARTING THE TEST RUN

Caution:

• Turn on the power at least 12 hours before starting operation.

- Starting operation immediately after turning on the main power switch can

result in severe damage to internal parts. Keep the power switch turned on during the operational season.

• Do not touch the switches with wet fingers.

- Touching a switch with wet fingers can cause electric shock.

• Do not touch the refrigerant pipes during and immediately after operation.

- During and immediately after operation, the refrigerant pipes are may be

hot and may be cold, depending on the condition of the refrigerant flowing through the refrigerant piping, compressor, and other refrigerant cycle parts. Your hands may suffer burns or frostbite if you touch the refrigerant pipes.

• Do not operate the air conditioner with the panels and guards removed.

- Rotating, hot, or high-voltage parts can cause injuries.

• Do not turn off the power immediately after stopping operation.

- Always wait at least five minutes before turning off the power. Otherwise,

water leakage and trouble may occur.

• Do not operate the air conditioner without the air filter set place.

- Dust may accumulate, and cause a failure.

• At emergency (if you smell something burning), stop operation and turn the power source switch off.

- Continuing the operation without eliminating the emergency state may cause

a machine trouble, fire, or electric shock.

• Remote controller should be pushed with finger.

- It occasionally causes the electric shock and the breakdown.

Page 7

4 DATA

4-1. REFILLING REFRIGERANT CHARGE (R-22 : kg)

4-2. COMPRESSOR TECHNICAL DATA

at 20˚C

Note:

If there is an insufficient amount of refrigerant in the system, the unit will behave in one of the following ways: 1) the discharge temperature of the unit rises abnor-

mally high, which is detected as an error, and the unit comes to a stop; 2) the discharge temperature of the compressor rises abnormally high, the unit goes into the unload operation, which appears as the P8 error on the display, and the unit comes to a stop; or 3) the built-in thermostat on the compressor goes off and stops the compressor. In either case, replenish and adjust the refrigerant. Once the unit goes into the unload operation, it takes at least 3 hours until normal operation can be restored.

Model PUH-8 0.0 0.3 0.9 1.5 2.1 2.6 3.2 3.8 4.4 5.0

PUH-10 0.0 0.3 0.9 1.5 2.1 2.6 3.2 3.8 4.4 5.0

7.5m 10m 15m 20m 25m 30m 35m 40m 45m 50m

Piping length (one way) Additional refriferant charge (R22) kg

Outdoor Unit Compressor Model

Widing

Resistance

( )

T1-T2 1.59 1.23 T2-T3 1.59 1.23 T3-T1 1.59 1.23

PUH-8 PUH-10

ZR-94KC-TFD-501 ZR-125KC-TFD-501

Page 8

5 SOUND DATA

5-1. OUTDOOR UNITS

(2) Position measurement

SPL

dB(A) 63Hz 125Hz 250Hz 500Hz 1000Hz 2000Hz 4000Hz 8000Hz

(1) Sound Levels

PUH-8

YKA

Cool Heat

PUH-10

YKA

61 63 61 63

60 62 59 60

59 61 59 60

58 61 59 62

59 60 59 62

57 58 57 58

54 54 53 54

48 50 49 49

42 44 42 43

Model

PUH-8,10YKA

Measurement point

OCTAVE BAND FREQ.Hz

0.75m

Page 9

6 OUTLINES AND DIMENSIONS

PUH-8YKA, PUH-10YKA

Unit : mm

Accessory

Conduit mouting plate

(Painted the same color as the unit body)

27 1pc.

34 1pc.

Tapping screw 4X12

Connection pipe

Packing.

Note 1.It is possible to change to

selecting the conduit mounting plate a,b.

4-10X20 Holes

Refrigerant pipe

PU-8YAKD

PUH-8YKA

25.4 (1 flange)

PU-10,12YAKD

PUH-10YKA

Knock out hole

Pressure gauge

(For option)

Refrigerant pipe

15.88(5/8 flare)

For the indoor unit

connection wiring

27 Hole

Note 1

For the power

supply wiring

40 Hole

For mounting

anchor bolt M8

[Field supply]

Air outlet

Air

inlet

Air inlet

Top view

Right side view

Front view

Left side view

Connection pipe

(Accessory)

28.6 (1-1/8 flange)

27 or 34 by

4pcs.

1pc.

1pc

615

3454734

585 1515

1480

1047

108.5 830 108.5

152 55

115 100

Page 10

7 WIRING DIAGRAM

PUH-8YKA, PUH-10YKA

DISCHARGE TEMP

LIQUID PIPE TEMP

AUXILIARY RELAYX1TRTRANSFORMER

OVER CURRENT RELAY (COMPRESSOR)

MAGNETIC CONTACTOR (COMPRESSOR)

PRESSURE SWITCH (LOW PRESSURE)

63L

51C

52C

F1,F2 FUSE (15A 250VAC CLASS T)

SYMBOL NAME

FAN MOTOR (OUTDOOR)MF2,MF3

PRESSURE SWITCH (HIGH PRESSURE)

PRESSURE SWITCH (FOR CONTROL)

MC COMPRESSOR MOTOR

63H1

63H2

4-WAY VALVE

21S4

OUTDOOR UNIT

TH2

21 21

TH1

THERMISTOR

FUSE (6.3A 250VAC CLASS F)

SWITCH

AUXILIARY RELAY

SOLENOID VALVE

CRANK CASE HEATER (COMPRESSOR)

TERMINAL BLOCK

SV1

TB1,3,8

CN3D

CN3 CN4

CN2

CN40

4123

CNMNT

CNVMNT

LED (FOR SERVICE)

F01-F04

LED1

TH1

TH2

OUTDOOR

MAIN BOARD

CN3S

OFF

64123 5

OFF

SW5

X01-X05

SW1-5

CN3N

SW1SW4SW3

X04

CONNECTOR (THERMISTOR FOR COND/EVA TEMP)

CONNECTOR (LEV)

CONNECTOR (CONNECT TO OPTIONAL M-NET ADAPTER BOARD)

CN4

CN40

CNMNT

CNVMNT

63H2

CN24

OFF

64123 5

SW2

X03

CONNECTOR (EXTERNAL I/O)

CONNECTOR (NIGHT MODE/SNOW SENSOR)

CONNECTOR (OPARATION)

FUSE (6.3A 250VAC CLASS F)

CN51

CN3N

CN3D

F10-F30

N.F.BOARD

sure matching wiring and terminal.

2.Color of earth wire is yellow and green twisting.

3.Specification subject to change without notice.

4.This motor(*1) includes auto reset type internal thermostat.

5.Indoor and outdoor connecting wires (*2) are made with polarities, make

Note:1.The dotted lines show field wiring.

CN51

DC power supply

MAIN BOARD

Transmission

Circuit

X01

X02

X05

over current relays is installed. Therefore, do not

change factory set value of over current relays.

1.To protect compressor from abnormal current,

6. mark is connector. mark is terminal. Caution,

CN34

SECONDARY

313131

CN28

PRIMARY

CNS3

CNFG

OUTDOOR UNIT CONTROL BOX

(*1)(*1)

CH 63H1 63L

21S4 SV1

MF2 MF3

Black

White Red

CN23

51C

F01

F04

F03

CN22

135

CN26

CN21

CN25

CN53

CN52

CNFC1

52C

C21C22

13 1

C11C12

13 1

CNFAN

135

CNFC2

F.C.

CNPOW

BOARD

CNOUT2

135 13

135

CNOUT1

F10

F20

F30

CNIN

CN20

L1NL2

N.F. BOARD

F02

Green/Yellow

Blue Black

IN IN

OUT OUT

TB8

S3S2S1

TB3

INDOOR UNIT

TO INDOOR UNIT

CONNECTING WIRES (*2)

(POLER)

White

51C

Red

52C

TB1

L1 L2 L3

POWER SUPPLY

3N~PE

380/400/415V

50HZ

CIRCUIT BREAKER

PUH-8,10YKA : 50A

(FIELD SUPPLY)

Page 11

8 REFRIGERANT SYSTEM DIAGRAM

PEH-8: O.D. 4.0

I.D. 3.0-L1000

PEH-10: O.D. 4.0

I.D. 3.0-L700

PUH-8:

O.D. 6.0

I.D. 4.0-L14

PUH-10:

O.D. 6.0

I.D. 4.6-L15

Outdoor heat exchanger

Thermistor

TH1

(liquid temp)

Thermistor TH2

(discharge temp)

Low pressure

switch

(with heat insulator)

Ø15.88mm

Refrigerant pipe

8HP:Ø25.4

10HP:Ø28.6mm

(with heat insulator)

Ball valve

Ball

valve

Service

port

4-wau value

Service port

High pressure switch

(protection)

High pressure

switch (control)

Service

port

Strainer

Capillary

tube

Capillary tube

O.D. 6.0

I.D. 4.0-L800

Capillary tube

O.D. 6.0

I.D. 4.0-L700

Compressor

Accumulator

Solenoid valve

Strainer Strainer

Indoor

heat

exchanger

Restrictor

valve

Distributor

Thermistor

TH2

Thermistor

TH5

Capillary

tube

Flared

connection

Brazing

connection

Brazing

connection

Flange

connection

Restrictor

valve

Refrigerant flow in cooling

R.V.coil

Heating:ON

Cooling:OFF

Refrigerant flow in heating

PUH-8YKA PUH-10YKA

Page 12

9 SYSTEM CONTROL

9-1. OUTDOOR UNIT ADDRESS SETTINGS

9-2. EXAMPLES OF REFRIGERANT SYSTEM ADDRESS SETTING

9-3. CAPACITY CONTROL SETTING METHOD (PEH-16, 20 ONLY)

9-4. GROUPING BY USING LCD REMOTE CONTROLLER

••When controlling a group, the address must be set for each outdoor unit.

During address setting, set all the dip switches SW1 (3 - 6) on the board to <when shipped from factory: all OFF>. (Address setting is not necessary for 1:1 or Free multi-component systems.)

•

Settings using SW1 are given below.

•

Please set the mutually different address, and pre vent the start up simultaneously. (In case of connecting with PEH-16, 20)

(SW1)

OFF ON 1 2 3 4 5 6

1 –

2 Error history clear 3 Refrigerant system

address setting

4 ↑

switching

5 ↑

SW1 function

6 ↑

Model

Operation by switch manipulation

––

Clear

OFF

Ordinary

Outdoor unit address

Settings 0 - 15

OFF ON 1 2 3 4 5 6

OFF ON 1 2 3

4 5 6

OFF ON 1 2 3

4 5 6

OFF ON 1 2 3

4 5 6

OFF ON 1 2 3

4 5 6

OFF ON 1 2 3

4 5 6

OFF ON 1 2 3

4 5 6

–

No.1 No.2

Outdoor unit refrigerant

system address

00 00

01~15

Ex.

Indoor unit

PEH-8, 10

PEH-16, 20

Set the refrigerant system address of one outdoor unit to 00 for the power supply

Outdoor unit

Remote controller power supply unit

to the remote controller. (The refrigerant system address is set to 00 when shipped from the factory.) Do not duplicate the refrigerant system address settings within the same system.

OFF ON 1 2 3

4 5 6

OFF ON 1 2 3

4 5 6

OFF ON 1 2 3

4 5 6

OFF ON 1 2 3

4 5 6

OFF ON 1 2 3

4 5 6

OFF ON 1 2 3

4 5 6

With the PEH-16, 20 which has two outdoor units, the capacity can be controlled to 0%, 50% or 100%. This is set by setting the outdoor unit side dip switches as shown in the table below before turning the power on.

DipSW5-1

No.1 side outdoor unit

OFF

No.2 side outdoor unit

Combination of indoor/outdoor unit can be controlled up to a maximum of 16 refrigerant systems.

* In case of PEH-8, 10 * In case of PEH-16, 20

FGEJ

2 2

BBB

EF GH IJ A

No.1ANo.2ANo.1ANo.2ANo.1

B BB

No.2

C D

C Main remote controller D Subordinate remote controller E Standard (Refrigerant address = 00) F Refrigerant address = 01 G Refrigerant address = 02 H Refrigerant address = 03 I Refrigerant address = 14 J

B Indoor unitA Outdoor unit

Refrigerant address = 15

Page 13

1 Wiring from the Remote Control This wire is connected to TB5 (terminal board for remote controller) of the indoor unit (non-polar).

2 When a Different Refrigerant System Grouping is Used Up to 16 refrigerant systems can be controlled as one group using the LCD remote

controller.

Notes:

1. In single refrigerant system, there is no need of wiring 2 .

2. LCD remote controller can be installed up to a maximum of 2 units for one group.

Grouping (16 outdoor units) [Connecting with PEH-16, 20]Grouping (16 outdoor units) [Example: PEH-8, 10]

PUH-8, 10

(00)

L1 L2 L3 N S1 S2 S3

PUH-8, 10

(01)

L1 L2 L3 N S1 S2 S3

PUH-8, 10

L1 L2 L3 N S1 S2 S3

PUH-8, 10

(15)

L1 L2 L3 N S1 S2 S3

(14)

OUT OUT

IN IN

A B C

PUH-8, 10

(00)

L1 L2 L3 N S2S1 S3S2S1 S3

PUH-8, 10

(14)

L1 L2 L3 N S2S1

PUH-8, 10

(15)

L1 L2 L3 N S2S1

PEH-8, 10

L1 L2 L3 N

PEH-8, 10

L1 L2 L3 N

S3S2S1 S3

PEH-8, 10

S3S2S1 S3

L1 L2 L3 N

A BC

A B C

A BC

A B C

A Power supply B Earth leakage breaker C Circuit breaker or local switch D Remote controller E Indoor unit F Outdoor unit (Address)

PEH-16, 20

(TB4-1) (TB4-2)

S1 S2 S3 S1 S2 S3 L1 L2 L3 N

PEH-16, 20

(TB4-1) (TB4-2)

S1 S2 S3 S1 S2 S3 L1 L2 L3 N

A BC

Page 14

10 TEST RUN

10-1. OUTDOOR UNIT

(1) Test run

The test run can be carried out from the outdoor unit.

1. Checklist

• After the installation, piping setup, and wiring of the indoor and outdoor units is complete, check that refrigerant is not leaking, the power and control wires are not loose, and the poles are not reversed.

• Use a 500 V insulation resistance tester to make sure that the resistance be- tween the power terminal and the ground is 1.0 MΩ or more. If it is less than

1.0 MΩ, do not operate the unit. * Absolutely do not touch the tester to indoor/ outdoor connection terminals S1, S2, and S3. An accident could occur.

• Make sure there is no malfunction in the outdoor unit. (If there is a malfunction, you can diagnose it using LED1 on the board.)

• Check that the ball valve is fully open on both the liquid and gas ends.

• Check to make sure that L

order. Connecting them in the reverse order will trip the negative-phase protector, and the unit will come to a stop, displaying the Error code F1.

• •Starting at least 12 hours before the test run, send current through the

crankcase heater. (If the current is running for a shorter period of time, damage to the compressor could result.)

After the above checks are complete, carry out the test run as indicated in the following outline.

1, L2, and L3 are connected in the correct phase

2. Starting and finishing the test run

• Procedure from the outdoor unit: start and stop the test run and set test run mode (cooling/heating) using the SW4 dip switches on the board.

1 Set test run mode (cooling/heating) using SW 4-2. 2 The test run will begin when SW 4-1 is turned ON, according to the mode

selected by SW 4-2.

3 The test run is stopped when SW 4-1 is turned OFF.

<SW4>

OFF

stop

1 2

cooling

Note: Test run mode cannot be stopped during operation by using SW 4-2. (If the operation mode is to be changed, first stop it using SW 4-1, then after c hanging the operation mode, start the test run again using SW 4-1.)

• If the 2-hour timer is set, the test run will stop automatically after 2 hours.

• During the test run, the room temperature display on the indoor unit will indi-

cate the temperature of the indoor unit piping.

• When you operate the test run from OC1, all trial runs are completed by OC1 → IC1 → MA → IC1 → OC2.

PEH-16, 20(IC1) MA

OC1

OC2

run

heating

(2) How to handle problems with the test run

Error code list:

Remote controller

display

E1, E2

E3 E4 E5 E6 E7 E8 E9 EA EB EC ED EE

F8 A0 A2 A3 A6 A7 A8 EF U2 U2 U3 U4 U6 UE UL

F8 P1 P2 P4 P5 P5 P6 P6 P8

details

MELANS display

6831,6834 6201,6202 6832,6833 6831,6834 6832,6833 6740,6843 6841,6842 6840,6843 6841,6842

6844 6845 6846 0403 0403

4103 4115 6600 6602 6603 6606 6607 6608

undefined

1102 1108 5104 5105 4101 1302 1300 4115 5101 5102 2503 2502 2500 1503 1504 1110 5103

Remote controller communication – reception error Remote controller board error Remote controller communication – transmission error Remote controller communication – reception error Remote controller communication – transmission error Communication between indoor and outdoor units – reception error Communication between indoor and outdoor units – transmission error Communication between indoor and outdoor units – reception error Communication between indoor and outdoor units – transmission error Indoor/outdoor connection wiring error, indoor unit overload (5 units or more) Indoor/outdoor connection wiring error (interference, loose) Excessive time in use Serial communication error Serial communication error

Reverse phase, out of phase verification Faulty input circuit Duplicated M-NET address setting M-NET error in PH/W transmission M-NET bus busy M-NET communication error with P transmission M-NET error – no ACK M-NET error- no response Undefined error code Outlet temperature error CN23 Short-circuit Connector Unplugged Open/short in discharge temp thermistor Open/short in liquid temp thermistor Compressor overcurrent interruption (51C operation) High pressure error (63H1 operation) Low pressure error (63L operation) Power synchronous idle circuit error Inlet sensor error Open/short in liquid temp thermistor Drain sensor error Drain overflow protector operation Water leak error (PDH only) Freeze prevention operation Surge prevention operation Piping temperature error Open/short in condenser/evaporater temp thermistor

Error details

Problem location

Remote Controller Remote Controller Remote Controller

Indoor unit Indoor unit Indoor unit

Indoor unit Outdoor unit Outdoor unit Outdoor unit

Outdoor unit Outdoor unit Outdoor unit

M-NET board

Outdoor unit Outdoor unit

M-NET board M-NET board M-NET board M-NET board M-NET board M-NET board

–

Outdoor unit Outdoor unit Outdoor unit Outdoor unit Outdoor unit Outdoor unit Outdoor unit Outdoor unit

Indoor unit

Page 15

• Depending on the position of the SW2 switch on the outdoor unit board, the segments light up to indicate the running condition of the unit and the particulars of the chec

code.

SW2 setting

123456 000000

Operation mode/relay output

Item

tens place O: stop

C: cooling H: heating d: defrosting

units place 1: SV1

2: 21S4 4: 52C

When an error occurs, the error code and error signal (*1) are displayed in alternation.

Display contents

Relay output = SV1 + 21S4 + 52C

Ex. During cooling mode, when 52C and SV1 are ON: C5

011110

010110

110110

011100 111100

*1 Display system for error indicator

The indicator corresponds to the following numbers

0 ............. Outdoor unit

1 ............. Indoor unit No.1

2 ............. Indoor unit No.2

3 ............. Indoor unit No.3

4 ............. Indoor unit No.4

Outdoor unit control condition

Indoor unit control condition

Error code history 1 Error code history 2

(IC1)

(IC2)

(IC3) (IC4)

Control mode display system

Indoor unit No.2 Indoor unit No.4

The error code (ex. U8, UA) and error indicator (*1) are displayed in alternation.

Indoor unit No.1 Indoor unit No.3 Outdoor unit

Display

0 1 2 3 4 5 6 7

Hot adjustment

Freeze prevention

Surge prevention Compressor OFF

Control mode

Indoor unit

Ordinary

Defrosting

—

Heater ON

Outdoor unit

← ← ← ← ← ← ← ←

Page 16

11 CONTROL

11-1. COMPOSITION OF CONTROL

(1) Function block diagram

3N~ 380/400/415 V 50 Hz

outdoor

indoor

Electrical

terminal block

Indoor/outdoor

connection terminal

Indoor/outdoor

connection terminal

block

Fuse

microcomputer

Communication

circuit

DC/DC

converter

LED1

<Power>

ransformer

DC5V for

12V

Magnetic

contractor

Fuse

Semiconductor relay

Fan control

Over current relay

4-way valve, solenoid valve, crankcase heater

Outdoor fan

Semiconductor relay

Compressor

Louver

Vane

Drain pump

Others

Remote

controller

terminal block

Remote controller

terminal block

Remote controller

Current

detection

LED2 LED3

DC5V

Key input

LCD

Send/receive

Communication

circuit

Fan control

Indoor fan

Page 17

11-2. CONTROL SPECIFICATIONS

(1) Protection functions

1) The main protection devices for the outdoor unit are: a) High pressure protection (63H1) b) Compressor overcurrent protection (51C) c) Liquid temp thermistor trouble (TH1) d) Discharge temperature protection (TH2 ≥118 °C) e) Discharge temp thermistor trouble (TH2) f) Low pressure protection (63L)

2) When tripping of a detection device is sensed, the check mode is entered and the compressor is stopped. (After 3 minutes, the compressor restarts.) Thereafter, the compressor is stopped when the specified number of check modes or greater is sensed within the check time.

Protection functions

a) High pressure protection

(63H1)

b) Compressor

protection (51C)

Compressor internal thermostat

Outdoor unitIndoor unit

d) Liquid temp thermistor

trouble (TH1)

e) Discharge temperature

protection (TH2

f) Discharge temp ther-

mistor trouble (TH2)

Low pressure protection (63L)

overcurrent

135 °C)

Operation value

3.3 MPa PUH-8:22A

PUH-10:28A

PUH-8:130 ± 5˚C 80A in 3-10sec PUH-10:105 ± 5˚C 95A in 3-10sec

Less c)than –39 °C or greater than 88 °C

Greater than 135 °C

Less than 0 °C or greater than 216 °C

0 MPa

Detection condition

Compressor operating

Compressor operating 0 –

Compressor operating except for 10 minutes at end of defrosting and 7 minutes while compressor starting

Compressor operating Compressor operating except for

10 minutes at end of defrosting and 5 minutes while compressor starting

Compressor operating except for defrosting, 10 minutes at end of defrosting

Number of

check modes

1 time

2 times

1 time

2 times

Check time

30 minutes

–

Intake temp thermistor (TH1)

Liquid temp thermistor

(TH2)

TH1 -39˚C 88˚C TH1

TH2 -39˚C 88˚C TH2

Compressor operating except for 3 minutes after the detection of preliminary inlet temperature sensor error

Compressor operationg except for 7 minutes while compressor starting and for 3 minutes after the detection of preliminary pipe temperature sensor error

2 times

30 minutes

Page 18

3) Check mode is released by stopping operation, changing the operation mode, or check mode time up. A check mode is also released by stopping of operation by remote controller.

4) Detected check mode history (newest) and abnormality history (last 2 times) are memorized and are displayed on the segment by circuit board DIP switch setting. The operation mode when the newest abnormality was generated, the thermistor temperature (TH1,2), and the thermostat ON time can also be displayed.

(2) Compressor, 4-way valve, and crankcase heater control

1) Determines the operation mode and operates the compressor based on the indoor/outdoor communication or MNET communication data.

2) Compressor control has a function which prevents the compressor from restarting within 3 minutes.

3) The 4-way valve is always ON during heating (except during defrosting). In other modes, it is OFF. However, when the operation mode was changed from heating to stop, the 4-way valve is turned off 10 minutes after the compressor was stopped.

4) While the compressor is stopped, the crankcase heater remains ON. (OFF while the compressor is operating.)

5) When the operation mode is changed while the compressor is operating, the compressor stops and 3 minutes later restarts in the new mode.

(3) Fan control

Controls the fan speed based on the piping temperature (TH1) to perform cooling at low outdoor temperatures and heating at high outdoor temperatures.

1) Control at cooling a) When the compressor stops, the fan stops (fan output=0%). b) When the power is turned on, or when the compressor is restated after it has been stopped for 30 minutes or

longer, the piping temperature ( TH1) determines the fan output.

When TH When TH < 25˚C Fan output = 60 %

c) When the compressor is restarted within 30 minutes after it has been stopped, the f an step before the compres-

sor was stopped is selected. Howev er, when the fan output was under 30% when the fan was stopped, 30% is

selected. d) When the mode was changed from heating to cooling, the fan step conforms to item 2. e) Two minutes after the fan is started, the fan step (number of units) is controlled every 30 seconds based on the

piping temperature (TH1). f) When TH1 reaches 55˚C or higher, or when the control high pressure switch (63H2) tr ipped, the fan output

becomes 100%. g) Fan output while the compressor is operating is within the 20% to 100% range.

• FAN step The following expression determines the next fan step count nj+1: nj + 1 = nj + ∆nj nj: Current fan step, ∆nj: Displacement step amount nj control

• If nj + 1 ≥ 100% nj + 1 = 100%

• If nj + 1 20% nj + 1 = 20%

• If TH1 ≥ 55 °C or 63H2 is “OFF” nj + 1=100%

25˚C Fan output = 100 %

FAN ∆nj Outputs are all %.

20 ˚C

Target condensation temperature 31 °C

20 ≤ nj < 50 50 ≤ nj < 100

Current

output

t > 49 °C

t = 49

t = 46

t > 46

t > 43 3 4

* In the night mode, the maximum value of nj is 80%. (When TH1 55˚C)

Condensation temperature TH1

t = 43

t = 40

t > 40

t > 36

2 2

t = 36

t > 33

2 2

t = 33

t > 29

0 0

t = 29

t > 26

–2 –2

t = 26

t > 23

–2 –2

t = 23

t > 20

–3 –4

≤

–5

–10

Page 19

2) Control at heating a) When the compressor is stopped and during defrosting, the fan is stopped. b) When the power is turned on, or when the compressor is restarted after being stopped for 30 minutes or longer,

the piping temperature (TH1) determines the fan step.

TH1 8˚C Fan output = 60%

< 8˚C Fan output = 100%

TH1 c) When the compressor is restarted within 30 min utes, the fan step is the step before the compressor was stopped. d) When the mode is changed from cooling to heating, the fan step conforms to item b). e) When returning from defrosting, the fan step is the step before defrosting. f) Two minutes after the fan was restarted, the fan step is controlled every 30 seconds based on the piping

temperature (TH1).

g) When TH1 is –5˚C or lower, the fan output is made 100%.

• FAN step The following expression determines the next fan step count nj + 1: nj + 1 = nj + ∆nj nj: Current fan step, ∆nj: Displacement step amount nj control

• If nj + 1 100% nj + 1 = 100%

• If nj + 1 ≤ 20% nj + 1 = 20%

• If TH1 < –5 °C nj + 1=100%

FAN ∆nj Outputs are all %.

Evaporation temperature TH1

Target evaporation

temperature 10 °C

T > 19 °C

T = 19

T > 17

T = 17

T > 15

T = 15

T > 13

T = 13

T > 11

T = 11

T > 8

T = 8

T > 6

T = 6

T > 4

T = 4

T > 2

T = 2

T > 0

T≤ 0˚C

20 ≤ nj + 1 ≤ 100

Current

output

–10

–4

–3

–2

(4) Defrosting control

1) When the following conditions are satisfied, defrosting starts: a) When the integrated compressor operation time has exceeded T

temperature (TH1) is below –5˚C

b) When the integrated compressor ˚C

Piping differential temperature ∆TH1 = TH10 – TH1

Piping temperature 10 minutes after starting or 10 minutes after returning from defrosting

2) The defrosting prohibit time T

2 ≤ 3 (minutes) T1 60 (minutes)

2 740

3 < T 7< T

2 10 40

10 < < T

2 15 40

= 15

1 is set as following based on the defrosting time T2:

1 is reset at the end of defrosting, or by cooling ON command.

Note: T

Note: When the compressor was stopped during defrosting, T1 = 20 minutes is set to recognize the stop as

defrosting end.

3) During defrosting, all the outdoor f ans are stopped and the bypass solenoid valv e (SV1) is turned ON and the 4-way valve (21S4) is turned OFF.

4) When the following conditions are satisfied, defrosting ends: a) T b) 5 < c) T

5) When

2 ≤ 5 mins TH1 ≤ 25°C

2 < 15 minutes TH1 ≤ 20°C continuous 2 minutes

2 =15 minutes

the fan and 4-way valve (21S4) are turned ON at the end of defrosting, the heating mode is reset.

minutes after defrosting reset, the bypass solenoid valve (SV1) turns OFF.

6) When using PEH-16·20MYC, alternate defrosting is possible after sending and receiving each respective outdoor unit defrost signal.

1 (initial setting 40 minutes) and the piping

Current piping temperature

Two

Page 20

(5) Bypass solenoid valve control (SV1)

1) Control at cooling a) While the compressor is stopped, the solenoid valve is OFF. b) When the power is turned on, or when the compressor is restarted after it has been stopped for 30 minutes or

longer, if the liquid temperature (TH1) is 25˚C or higher then the solenoid valve turns ON for 2 minutes.

c) When the power is turned on, or when the compressor restarted after it has been stopped for 30 minutes or

longer, the solenoid valve turns ON for 5 minutes if the liquid temperature (TH1) is staying below 25˚C. d) The item b) or c) is applied to the mode change from heating to cooling. e) When the pre vious operation mode is cooling and the compressor restarted within 30 minutes after it’s stopping

by the tripping of 63H2, the solenoid valve turns ON for 2 minutes.

2) Control at heating a) While the compressor is stopped, the solenoid valve is OFF. b) When the power is turned on, or when the compressor restarted after it has been stopped for 30 minutes or

longer, the solenoid valve turns ON for 2 minutes if the liquid temperature (TH1) is staying above 8˚C.

c) When the power is turned on, or when the compressor restarted after it has been stopped for 30 minutes or

longer, the solenoid valve turns ON for 5 minutes if the liquid temperature (TH1) is staying below 8˚C. d) The item b) or c) is applied to the mode change from cooling to heating. e) When the control pressure switch (63H2) trips, the solenoid valve turns ON. f) If 63H2 resets 15 minutes after tripping, the solenoid valve turns OFF. g) During defrosting, the solenoid valve turns ON. h) When the pre vious operation mode is heating and the compressor restarted within 30 minutes after it’s stopping

by the tripping of 63H2, the solenoid valve turns ON for 2 minutes. i) When the previous operation mode is heating, and the compressor restarted within 30 minutes after the tripping

of 63L, the solenoid valve turns ON for 2 minutes.

(6) Service functions

1) Abnormality history clear a) When DIP SW1-2 is turned ON while the compressor is operating or stopped, the abnormality history is cleared.

Page 21

11-3. FUNCTION OF SWITCHES AND CONNECTORS (OUTDOOR UNIT)

(1) Outdoor unit

OFF

356

OFF

356

OFF

356ON365

568

)

ec-

eat

oDonot

otDo

eFunc

ear

ess

cetec

ec-

)

essnd

33.

1)Functi

Normal mode

Kin

wit

witc

ope

Normal

witch

Pol

Abnormalityhistoryl

Refrigerant syste

Non

tio

settin

Norm

lmo

W3=

Operation

witch operatio

lea

123456

OFF

0123

OFF

123456

OFF

123456

OFF

123456

3,4

reN

OFF

witch tivetimin

Running

stoppe

henpowe

turn

act

W W

b)witch functionst

Kin

wit

witc

Pol

hort

witchin

rialrun trail run byinput stopped.

Modeinput

Note:

After themodebyN

Factory settin

elf diagnosi

Mode input registe

rialrun mode switchin

Inlet temp. re-readin

3-phase power

our

tio

Coolingonlyswitchin

Non

tmodechan

Functi

Non Non Non

Defrostingndswitchin

Defrostingprohibit tim

switchin

Non

continuous 2 minutes

ee pages 109 to 11

Registe

Operat

Norm

Stop

ool

Do n

Coolingonl

et input

N33=

hort

Operation

W3=

witch operatio

Heat pump

ontinuo

Fix

For

own

ontinuo

rainin

W3for

thetrail run section

out

onds.Th

mode switching), return tothenormalmodebyopeningN

Running

stoppe

stopped*

stoppe

henpowe

turn

henpowe

turn

witch

timin

tiv

stoppe

Page 22

c) Connector function assignment

Type

Connector

CN31 CN32 CN33

Function

Emergency operation

Function test

DIP switch mode switching

Operation by open/short

short open

Start Normal

Function mode Normal

Mode switching Normal

Switch effec-

tive timing

At initialization At initialization

stopped

CN3N-3 Snow sensor Snow sensor control Normal Always

Connector

CN3N-2 Night mode Night mode Normal Always CN3D-2 Switch cooling/heating Heating Cooling Always CN3D-3 Auto switching contact Switch cooling/heating Normal Always CN3S-2 Contact demand Contact demand Normal Always CN3S-3 Alternating defrost

Defrost signal from other unit

Normal Always

2) Outdoor unit operation monitoring function

The operation status and check code contents can be ascertained by means of the 2-digit number and symbol on digital display light emitting diode LED2 by operating DIP switch SW2.

• When ON (normal operation): Displays the operation mode.

SW2

123456

OFF

(Load status)

LED2

[Tens digit: Operation mode]

Display Operation mode

O stopped C Cooling/Dry H Heating

d Defrost

[Units digit: Relay output]

Display Compressor 4-way valve Bypass solenoid valve

0 –– – 1 –– ON 2 – ON – 3 – ON ON 4ON –– 5ON – ON 6ON ON – 7ON ON ON

• When blinking (Operation stopped by tripping protection device): Displays the check mode

Display Check unit

0 Outdoor unit 1 Indoor unit 1 2 Indoor unit 2 3 Indoor unit 3 4 Indoor unit 4

Display Check contents (at power on)

E8 Indoor-outdoor communication receive abnormal (outdoor unit) E9 Indoor-outdoor communication send abnormal (outdoor unit)

Indoor/outdoor connection erroneous wiring, number of indoor units mismatch Indoor/outdoor connection erroneous wiring (indoor unit power failure, disconnection)

Ed Serial communication abnormal (M-NET)

E0-E7 Communication other than outdoor unit abnormal

F8 Input circuit faulty

Page 23

• PUH-8,10 Display Check contents (operating)

U2 Compressor discharge temperature abnormal, CN23 short-circuit connector unplugged U3 Compressor discharge temp thermistor (TH2) open/short U4 Liquid temp thermistor (TH1) open/short U6 Compressor overcurrent protection trip (51C trip)

UE High pressure protection (63H1 trip)

UL Low pressure protection (63L trip) P1-P9 Indoor unit abnormal A0-A8 M-NET communication abnormal

Page 24

Self diagnosis by SW2

• PUH-8,10

SW2 setting Display contents Description of display Unit

–39 - 88 (When 0 °C or lower, “–”and temperature are displayed alternately.) <Example> When –10,

123456

OFF

Liquid temperature (TH1) –39 - 88

every other second –

←→ 10

°C

123456

OFF

123456

OFF

123456

OFF

123456

OFF

Discharge temperature (TH2) 0 - 216

FAN output 0 - 100

Number of compressor ON/OFF 0 - 999

Compressor integrated operation time 0 - 999

0 - 216 (When 100 or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 115,

every other second 1

←→ 15

0 - 100 (When 100 or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 100,

every other second 1

←→ 00

0 - 999 (When 100 or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 425,

every other second 4

←→ 25

0 - 999 (When 100 or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 245,

every other second 2

←→ 45

°C

100 times

10 hours

123456

OFF

123456

OFF

Current check mode code 1

Current check mode code 2

Check mode segment display method Segment and bit correspondence

bit 2 bit 3

bit 1 bit 5

bit 6 bit 7

bit 4 bit 8

Check mode 1 display method

bit 1..... Compressor discharge temperature

abnormal

bit 2..... Compressor discharge temp thermistor

abnormal (TH2)

bit 3..... CN23 short-circuit connector un-

plugged

bit 5..... Liquid temp thermistor abnormal (TH1)

Check mode 2 display method

bit 1..... Overcurrent trip (Comp)

bit 2..... Low pressure protection

Page 25

SW2 setting Display contents

Newest check code

123456

OFF

Newest outdoor unit abnormality Check display

Description of display

When no check mode,“00” <Example> When piping thermistor abnormal U4

Unit

Code display

123456

OFF

123456

OFF

123456

OFF

123456

OFF

Operation mode when abnormality occurred

Liquid temperature (TH1) when abnormality occurred – 39 - 88

COMP discharge temperature (TH2) when abnormality occurred 0 - 216

Check code history (1) (newest) Abnormal unit No. and check code inverted display

Operation mode when abnormally stopped <Example> Comp. only ON at cooling operation C4

–39 - 88 (When 0 °C or lower, “–” and temperature are displayed alternately.) <Example> When –15,

every other second –

←→ 15

0 - 216 (When 100 or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 130,

every other second 1

←→ 30

When no abnormality history “0”, “←→”, “–”

Code display

°C

Code display

123456

OFF

123456

OFF

123456

OFF

Check code history (2) (One before newest) Abnormal unit No. and check code inverted display

Current thermostat ON time 0 - 999

Number of indoor units connected 0 - 4

When no abnormality history “0”, “←→”, “–”

0 - 999 (When 100 or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 245,

every other second 2

←→ 45

0 - 4

Code display

Minutes

Units

Page 26

SW2 setting Display contents Description of display Unit

123456

OFF

Outdoor unit set information

Outdoor unit set information 1 Function setting (display valves)

3-phase power source detection Do (1) Do not (0)

ens digitUnits digit

Cooling only switching Cooling only (2) H/P (0)

Night mode Night mode (1) Normal mode (0) Defrosting end time Defrosting prohibit time Fixed (4) Training (0)

Set information display values are added and displayed at each position.

20 °C continuous 2 minutes

(2)

8 °C continuous 2 minutes

(0)

Code display

123456

OFF

123456

OFF

123456

OFF

123456

OFF

Indoor unit piping temperature (TH2) Indoor 1 –39 - 88

Indoor unit piping temperature (TH2) Indoor 2 –39 - 88

Indoor unit piping temperature (TH2) Indoor 3 –39 - 88

Indoor unit piping temperature (TH2) Indoor 4

–39 - 88

(When 0 °C or lower, “–”and temperature are displayed alternately.) When there are no indoor units, “00” is displayed.

–39 - 88 (When 0 °C or lower, “–”and temperature are displayed alternately.) When there are no indoor units, “00” is displayed.

°C

123456

OFF

123456

OFF

Indoor intake temperature 8 - 39.5

Indoor set temperature 17 - 30

8 - 39.5 When there are no indoor units, “00” is displayed.

°C

17 - 30 When there are no indoor units, “00” is displayed.

°C

Page 27

SW2 setting Display contents Description of display Unit

Indoor unit control

Control mode display system

status

123456

OFF

123456

OFF

Indoor 1, 2

Indoor unit control status Indoor 3, 4

Indoor unit No.2 Indoor unit No.4

Indoor unit No.1 Indoor unit No.3

Display

0 1 2 3 4

Freeze prevention

5 6 7

Control mode

Indoor unit

Ordinary

Hot adjustment

Defrosting

—

Heater ON

Surge prevention Compressor OFF

Outdoor unit

← ← ← ← ← ← ← ←

–

123456

OFF

123456

OFF

123456

OFF

Outdoor unit control status

Communication demand capacity 0 - 255

Abnormal thermistor display 1, 2, –

Control mode display system

Indoor unit No.2 Indoor unit No.4

Indoor unit No.1 Indoor unit No.3 Outdoor unit

Display

0 1 2 3 4 5 6 7

Freeze prevention

Control mode

Indoor unit

Ordinary

Hot adjustment

Defrosting

—

Heater ON

Surge prevention Compressor OFF

Outdoor unit

← ← ← ← ← ← ← ←

0 - 255 When communication demand not set: 100% (When 100 or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 100,

every other second 1

←→ 100

1, 2, – 1: Outdoor liquid temp thermistor (TH1) 2: Outdoor discharge temp thermistor (TH2)

–: No abnor mal thermistor

–

123456

OFF

123456

OFF

FAN output at abnormal stop 0 - 100

Outdoor Condenser/ evaporater temp temperature at abnormal stop –39 - 88

0 - 100 (When 100 or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 100,

every other second –

←→ 00

–39 - 88 (When 0 °C or lower, “–”and temperature are displayed alternately.) <Example> When –10,

every other second –

←→ –10

°C

Page 28

SW2 setting Display contents

Thermostat ON time up

123456

OFF

to abnormal stop 0 - 999

Description of display

0 - 999 (When 100 or higher, 100s digit and 10s and units digits are displayed alternately.) <Example> When 245,

every other second 2

←→ 45

Unit

Minutes

123456

OFF

123456

OFF

123456

OFF

123456

OFF

Indoor unit condenser/ evaporater temp temperature (TH3) Indoor 1 –39 - 88

Indoor unit condenser/ evaporater temp temperature (TH3) Indoor 2 –39 - 88

Indoor unit condenser/ evaporater temp temperature (TH3) Indoor 3 –39 - 88

Indoor unit condenser/ evaporater temp temperature (TH3) Indoor 4

–39 - 88

(When 0 ˚C or lower, “–”and temperature are displayed alternately.) When there are no indoor units, “00” is displayed.

–39 - 88 (When 0 ˚C or lower, “–”and temperature are displayed alternately.) When there are no indoor units, “00” is displayed.

˚C

Page 29

12 GROUP CONTROL

(1) Notes on performing group control

(

• Up to 16 indoor units can be sequentially started up with each remote controller.

• The ON/OFF control of the room temperature is performed individually for each refrigerant system with the inlet thermistor that is built-in on the unit.

• Up to two remote controllers can be connected to each group. (Up to two wired remote controllers can be connected. There are no restrictions on the number of wireless controllers that can be connected.)

Outdoor unit 00 Outdoor unit 01 Outdoor unit 02 Outdoor unit 15

Main Outdoor unit

00-1

Deluxe remote controller

Indoor unit No. (Refrigerant address) Indoor unit No. (Unit No.)

Power supply to the remote controller (main indoor unit)

01-1

Sub Outdoor unit

01102

02-1

Sub Outdoor unit

15-1

Sub Outdoor unit

Switch setting Automatic setting

Automatic setting

1 Connect the remote controller to an indoor unit, and daisy-chain all indoor units.

When connecting two remote controllers, the two controllers cannot be daisy-chained. Make the connections through indoor units.

2 Make the refrigerant address setting for each indoor unit, and turn on the power.

Set the refrigerant address before turning on the power. *The remote controller power supply unit is automatically set to the indoor unit with the refrigerant address of 01.

(LED 2 comes on.)

Refrigerant addresses are also used by the sequential start up timer (4 second interval) to prevent rush current. If any of the indoor unit addresses overlap, correct indoor unit cannot be identified during self-diagnosis or function

selection. Assign a different refrigerant address to all indoor units, following the setting procedures below.

Operation content

Refrigerant address

No. 3 ON

123456

10Delay time (sec.)

ON OFF

No. 4 ON

123456

ON OFF

No. 5 ON

123456

ON OFF

No. 6 ON

123456

ON OFF

At factory shipment, switches 3 through 6 of SW1 are all set to OFF, and the refrigerant address is set to “0.” In this case, the delay time will be between 0 and 9.

* Varies depending on the number of connected indoor units and remote controller operation timing.

According to the combination of switches 3 through 6 above, units can be sequentially started up at 1-second intervals between address 1 and address 15 (Delayed time between 10 and 24 seconds).

Example) Sequential start up timer set to 12 seconds

12 = 8 + 4 No. 5 and 6 switches ON

Page 30

NOTES FOR M-NET <MELANS> WIRING CONNECTION

(1) Example: Wiring system (When M-NET <MELANS> [Option] is used)

1: 1 system

Power supplyPower supply

Outdoor unit

Switch

Earth leakage breaker

Earth Remote controller

S1 S2 S3 S1 S2 S3

TRST

ABS

M-NET

Indoor unit

Switch

Power supply

Earth leakage breaker

Free Compo Multi (Connected with two indoor units) Grouping (Connected with up to 16 indoor units) 1 Model without a heater

Outdoor unit

Switch

Earth leakage breaker

Earth Remote controller

S1 S2 S3 S1 S2 S3

TABS

M-NET

Indoor unit

S1 S2 S3

Power supplyPower supplyPower supply

Outdoor unit (Address 0)

SwitchSwitchSwitch

Earth leakage breakerEarth leakage breakerEarth leakage breaker

Outdoor unit (Address 14)

Outdoor unit (Address 15)

Earth

S1 S2 S3 S1 S2 S3

ABS

M-NET

Earth

S1 S2 S3

ABS

M-NET

Earth

S1 S2 S3

TABS

M-NET

Indoor unit

S1 S2 S3

Remote controller

For detailed M-NET <MELANS> wiring connection, refer to the MELANS installation manual.

Slim outdoor unit

[00] 007

TB7

TB3

Slim outdoor unit

[00] 006

TB7 TB3

Y series outdoor unit

051

TB7 TB3

MELANS

TB5TB4

TB7 TB3

In the case without group operation

TB5TB4

001

002

003

101 103

In the case with group operation

[01] 008

004 005

TB5TB4

: Indoor unit : M-NET transmission line

: Remote controller

Numbers inside [ ] : outdoor unit address Numbers inside : M-NET (MELANS) address

To Slim outdoor unit

(MELANS) : Indoor/outdoor

transmission line : Remote controller line

TB7

SBA

To Y series outdoor unit

Magnified view of section “A”

TB7

BAS

Shield line

MELANS To TB7 of other outdoor unit

Use a switch or a breaker for wiring connection together with an earth leakage breaker when it is only for ground fault protection use.

Page 31

(2) Address Setting

Address setting of outdoor unit

· Address setting of each outdoor unit is required when group control is used.

· Dip SW1 (3-6) on the circuit board < All are set to OFF at factory shipment. > is used to set the address of outdoor unit.

(Address setting is not required for 1: 1 system and Free Compo Multi.)

· Address setting with SW1 is shown below.

(SW1)

OFF ON 1 2 3 4 5 6

1 Compulsory defrosting

SW1

2 Deletion of error history

Function

3 Refrigerant address setting

selection

4 5 6

Model

→→→

Operation according to switch setting

Start

Deletion

OFF Normal Normal

Address setting of outdoor unit

(0-15)

Refrigerant address No.

OFF ON 1 2 3 4 5 6

Address setting of M-NET (MELANS) [Option]

Set M-NET (MELANS) address among 1~50. Assign the smallest

address in a group to the M-NET (MELANS) connected with the outdoor unit whose address is 0. (Refer to the wiring connection sample.) Use the rotary switches SW11 and SW12 inside the control box on

the M-NET circuit board to set the address. (SW11: 1's digit, SW12: 10's digit < They are set to 0 at factory shipment. >)

Note that 10's digit is on the right, and 1's digit is on the left on the actual switch.

OFF ON 1 2 3 4 5 6

OFF ON 1 2 3

4 5 6

OFF ON 1 2 3

4 5 6

M-NET address

SW11

(1's digit)

Switch setting

SW12

(10's digit)

OFF ON 1 2 3

4 5 6

OFF ON 1 2 3

4 5 6

OFF ON 1 2 3 4 5 6

Page 32

14 EMERGENCY OPERATION

1) When the following check displays occur at the outdoor unit, or when the wired remote controller or indoor unit microcomputer fails, if there are no other defects, emergency operation is possible by shorting the connector (CN31) on the outdoor controller board.

• Abnormalities that allow emergency operation

Display Check contents

U4 Liquid temp thermistor (TH1) open or shorted E8 Indoor-outdoor communication receive abnormal (outdoor unit) E9 Indoor-outdoor communication send abnormal (outdoor unit)

E0 - E7 Communication other than outdoor unit abnormal

2) Check items and precautions when performing emergency operation a) In addition to the abnormalities above, check the outdoor unit for any abnormalities. (When there is an abnor-

mality other than the above, emergency operation is impossible.)

b) Check the operating range. (For U4 display)

Since the outdoor fan always operates at full speed at emergency operation, do not operate the air conditioner outside the range shown below.

Operation range (outdoor unit intake temperature) Cooling geater than 20 °C Heating less than 10 °

Operation outside this range may cause compressor trouble.

c) When performing emergency operation, set the outdoor unit after setting the emergency operation switch (SWE)

on the indoor controller board. For the indoor emergency operation method, refer to the indoor unit wiring diagram.

d) A power failure causes emergency operation to become continuous operation. ON/OFF, temperature adjust-

ment and other operations cannot be performed from the remote controller. (When a PEH-8,10,16,20indoor unit is connected, check that the special indoor unit power is turned on, then start emergency operation.)

e) Since cool air is discharged from the indoor unit, when the outdoor unit starts the defrosting operation during

heating emergency operation, do not operate the air conditioner for a long time. f) You can perform cooling emergency operation up to 10 hours. The indoor unit heat exchanger may freeze. g) At the end of emergency operation, always return the switch settings, etc. to their original state.

3) Emergency operation contents a) The operation mode operates according to the contents set (cooling or heating) by SW4-2. b) The fan operation condition is always 100% operation. c) The operation mode display flashes every other second.

Page 33

4) Emergency operation method

Start

Piping work complete?

YES

Check that mains power is OFF

Turn on emergency operation switch (SWE) on indoor controller board

Short CN31 (emergency operation connector) on outdoor controller board

Set operation mode (cooling or heating) with SW4-2 on outdoor board (SW4-1 not used)

Cooling Heating

SW4

OFF 1 2

* Before starting, recheck that the trouble allows

emergency operation.

urn on indoor power *1

urn on mains power

Check that emergency operation starts, and that operation mode display flashes

Emergency operation release method

Turn off mains power. (Outdoor, indoor) *1

Turn off emergency operation switch (SWE) on indoor controller board

Open CN31 (emergency operation connector) on outdoor controller board

Set SW4-2 as shown below

OFF

1 2

*1 Only when PEH-8,10,16,20 indoor unit connected.

SW4

Turn on mains power

*1. When PEH-8,10,16,20 indoor unit is connected,

first turn off the outdoor unit power,then turn off the indoor unit power.

Page 34

15 SELF-DIAGNOSIS AND TROUBLESHOOTING

Abnormality display

None

Meaning of abnormality display and abnormality troubleshooting

Indoor/outdoor connection erroneous wiring, too many indoor units (5 or more)

1.Outdoor controller board automatically recognizes the number of connected indoor units. However, when the number of connected indoor units cannot be set due to erroneous indoor/outdoor connection, erroneous wiring, etc. even after 4 minutes have elapsed since the power was turned on, an abnormality is recognized.

2.When the outdoor controller board identified “5 or more” connected in- door units, an abnormality is recognized.

Indoor/outdoor connection erroneous wiring

The outdoor controller board automatically sets the unit No. of the indoor units. However, when the unit No. of the indoor units cannot be set due to indoor/outdoor connection erroneous wiring even after 4 minutes has elapsed since the power was turned on, an abnormality is recognized.

Cause

(1) V oltage not applied to outdoor unit ter-

minal block TB1.

a. Power supply circuit breaker not

closed.

b. Power supply terminals connection

faulty, or disconnected.

c. Missing phase (R or S phase)

(2) No electricity at controller board power

supply connector.

a. Power supply connector contact

faulty.

b. Terminal R/1 or S/2 on controller

board disconnected.

(3)Outdoor unit controller board faulty.

a. Blown fuse on controller board. b. Part faulty.

(1)Indoor/outdoor connection wire con-

tact faulty or erroneous wiring.

(2) Indoor/outdoor connection wire diam-

eter or wiring length outside specification.

(3)Five or more indoor units connected

to outdoor unit.

(4) Outdoor controller board send/receive

circuit faulty.

(5)Indoor controller board send/receive

circuit faulty.

(6)Noise has entered on power supply

or indoor/outdoor connection wire.

(1)Indoor/outdoor connection wire con-

tact faulty, or erroneous wiring.

(2) Indoor/outdoor connection wire diam-

eter or wiring length outside specification.

(3) Outdoor controller board send/receive

circuit faulty.

(4)Indoor controller board send/receive

circuit faulty.

(5)Noise has entered on power supply

or indoor/outdoor connection wire.

Judgment method and remedy

(1)

a. Check power supply circuit breaker. b. Check power supply terminal block

connections.

c. Check power supply terminal block

connections.

(2)

a. Check power supply connector board

connections.

(3)

a. Replace fuse. b. Replace controller board.

(However, when cannot be repaired even through the check above was carried out.)

(1)Check if indoor unit or outdoor unit in-

door/outdoor connection wire disconnected or loose. Also check polarity.

(2) Check indoor/outdoor wire diameter

and wiring length. Outdoor-indoor: Max. 50m Indoor-indoor (span): Max. 30m Also check that VVF and other flat cables are connected in S1, S2, S3 order. (S2 in the middle)

(3)Check number of indoor units con-

nected to outdoor unit.

(4)Check by turning power off and on.

If abnormality is displayed again, replace outdoor controller board or indoor controller board.

* LED3 of the indoor controller board

flashes when communication is being performed.

Start-up time over

When start-up processing does not end even through 4 minutes has elapsed since the power was turned

on, an abnormality is recognized.

Reverse phase detected

Missing phase detected

(1)Indoor/outdoor connection wire con-

tact faulty.

(2) Indoor/outdoor connection wire diam-

eter or wiring length outside specification.

(3)Noise has entered on power supply

or indoor/outdoor connection wire. Power supply reverse phase connection. Power supply missing phase.

(1) Check power supply terminal block

connections.

(2)Replace controller board

(However, when cannot be repaired

even though check above was carried

out.)

Page 35

Abnormality display

Meaning of abnormality display and abnormality troubleshooting

Discharge temperature abnormal

When the discharge thermistor temperature (TH2) exceeds 1 35°C while the compressor is operating, an abnormality is recognized.

49C trip (CN23 connector disconnected)

When connector CN23 opens while the compressor is operating, an abnormality is recognized.

Discharge temp thermistor (TH2) open or shorted.

When an open (0 °C or lower) or short (216 °C or higher) is detected while the compressor is operating, an abnormality is recognized. (Detection is disabled for 5 minutes at compressor starting.)

Cause

(1) Compressor overheating due to insuf-

ficient refrigerant.

(2)Thermistor faulty. (TH2) (3)Outdoor controller board faulty.

(1)Shorting connector CN23 on outdoor

controller board dislodged or contact faulty.

(1)Connector (CN3) dislodged or con-

nect faulty.

(2)Thermistor faulty.

(3)Outdoor controller board faulty.

Judgment method and remedy

(1)Check input super heat.

Check for refrigerant leakage and check piping length. Charge with additional refrigerant.

(2)(3)

Turn off power and restar t operation and check if U3 is displayed within 8 minutes. When U3 is displayed, carry out U3 processing. (Do not replace board at U2 display only.)

(1)Repair shorting connector.

(1)Check connector contact and ther-

mistor wire.

(2)Check thermistor resistance value, or

check temperature by microcomputer. (Check using SW2 self-diagnosis function.) See page 24.

(3)Replace outdoor controller board.

(Replace board after sufficiently checking 1 and 2.)

Liquid temp thermistor (TH1) open or shorted.

When an open (–39 °C or lower) or short (88 °C or higher) is detected while the compressor is operating, an abnormality is recognized. (Detection is disabled for 7 minutes beginning from 10 seconds after the compressor starts and for 10 minutes after return from defrosting.)

Compressor overcurrent trip

When the current value reaches the overload set value or higher while the compressor is operating, an abnormality is recognized.

PUH-8 ................................. 22 A

PUH-10 ................................. 28 A

High pressure abnormal (63H1 trip)

Detected (3.3 while compressor is operating.

63H1: Pressure switch (high pres-

OFF: 3.3 MPa

sure)

MPa) by 63H1 trip

-0.15

(1) Connector (TH1: CN2) dislodged or

contact faulty.

(2)Thermistor faulty.

(3)Outdoor controller board faulty.

(1) Overload operation exceeding unit us-

age range limit. (2)Power supply terminal voltage low. (3)Power supply missing phase. (4)Compressor motor faulty. (5)Compressor locked. (6) Connector (CN22) on outdoor control-

ler board dislodged or contact faulty. (7)51C disconnected or contact faulty.

(1)Started with ball valve closed. (2) Connector (CN21) on outdoor control-

ler board dislodged or contact faulty. (3)63H1 disconnected or contact faulty. (4)Indoor filter clogged. Power reset de-

tected during heating overload opera-

tion (Heating). (5)Low indoor unit air flow (heating). (6)Low outdoor unit air flow (cooling). (7)Part faulty.

(1)Check connector contact and ther-

mistor wire.

(2)Check thermistor resistance value or

check temperature by microcomputer. (Check using SW2 self-diagnosis function.) See to page 24.

(3)Replace outdoor controller board.

(Replace board after sufficiently checking 1 and 2)

(1)Check usage conditions.

(Check for short cycle operation.) (2)Check power supply voltage. (3) Check wiring for breaks and faulty con-

tact. (4)Check motor winding resistance (See

page 7.) (5)Replace compressor. (6)(7)

After checking connections, restart and

check operation. (1)Check if ball valve is fully open.

(2)(3)

Repair connector. (4)Check indoor filter. (5) Check flow duct static pressure and for

faulty fan motor. (6)Check for faulty outdoor fan motor. (7)

Replace pressure switch.

Page 36

Abnormality display

Meaning of abnormality display and abnormality troubleshooting

Cause

Judgment method and remedy

Low pressure abnormal (63L trip)

Detected by tripping of 63L while the compressor is operating. (Ignored during defrosting and for 10 minutes at defrosting return.) 63L: Pressure switch (low pressure) OFF: 0 MPa

Remote controller communications receive abnormal (remote controller).

1) When transmission from refrigerant address “0” IC is not received normally even once in 3 minutes, an abnormality is recognized.

2) When a slave remote controller does not receive even one signal in 2 minutes, an abnormality is recognized.

Remote controller communication send abnormal (remote controller)

1) When the remote controller can not confirm that the transmission circuit is idle in 6 seconds, an abnormality is recognized.

2) When the remote controller cannot complete 30 continuous transmissions, an abnormality is recognized.

(1)Started with ball valve closed. (2) Connector (CN27) on outdoor control-

ler board open or contact faulty. (3)63L disconnected or contact faulty. (4)Part faulty.

(1)Remote controller send/receive

circuit faulty. (2) Refrigerant address “0” indoor control-

ler board send/receive circuit faulty. (3) Noise entered on remote controller

transmission line.

(1) Remote controller send/receive circuit

faulty. (2) Noise entered on remote controller

transmission line.

(1)Check if ball valve fully open. (2)(3) Repair connector.

(4)Replace pressure switch.

Perform remote controller diagnosis. Take the following action based on the diagnosed result: a) [RC OK] display

Remote controller normal. Turn power off and on and check. If “PLEASE WAIT” remains on for 4 minutes or longer, replace indoor controller board.

b) [RC NG] display

Replace remote controller.

c) [RC E3] display

[ERC00-66]



Noise, etc. probable



cause.



Indoor-outdoor communication receive abnormal (Outdoor unit)

When the outdoor controller can not receive normally even once in 3 minutes, an abnormality is recognized.

Indoor-outdoor communication send abnormal (Outdoor unit)

1) When the outdoor controller detectes reception of 30 consecutive “0” even through “1” was re- ceived, an abnormality is recognized.

2) When the outdoor controller can not confirm that the transmission circuit is idle in 3 minutes, an error is recognized.

Check code undefined

Displayed when an undefined check code is received.

(1)Indoor/outdoor connection wire con-

tact faulty.

(2) Outdoor controller board send/receive

circuit faulty.

(3)Indoor controller board send/receive

circuit faulty.

(4) Noise entered on indoor/outdoor con-

nection wire.

(1) Outdoor controller board send/receive

circuit faulty. (2)Noise entered at power supply. (3) Noise entered on indoor/outdoor con-

nection wire.

(1) Noise entered on remote controller

transmission line. (2) Noise entered on indoor/outdoor con-

nection wire.

(1) Check for disconnected or loose indoor

unit or outdoor unit indoor/outdoor connection wire.

(2)-(4)

Turn power off and on and check. If abnormality displayed again, replace indoor controller board or outdoor controller board.

(1)(2)(3)

Turn power off and on and check. If abnormality displayed again, replace indoor controller board or outdoor controller board.

(1)(2)

Turn power off and on and check. If abnormality displayed again, replace indoor controller board or outdoor controller board.

Page 37

Abnormality display

Meaning of abnormality display and abnormality troubleshooting

Intake sensor abnormal

1) If thermistor open or short is detected and the compressor enters the 3 minutes restart prevention mode and does not return to normal after 3 minutes, an abnormality is recognized. (If returned, returns to normal operation.)

2) Always detected during cool, dry, and heat operations. Short: 90 °C or higher Open: –40 °C or lower

Piping (liquid) sensor abnormal

1) If thermistor short or open is detected and the compressor enters the 3 minutes restart prevention mode and does not return to normal after 3 minutes, an abnormality is recognized. (If returned, returns to normal operation.)

2) Always detected during cool, dry, and heat (except during defrosting) operation. Short: 90 °C or higher Open: –40 °C or lower

Cause

(1)Thermistor characteristics faulty. (2)Connector contact faulty.

(Insertion faulty)

(3) Thermistor wiring open or contact

faulty.

(4)Indoor controller board faulty.

(1)Thermistor characteristics faulty. (2)Connector contact faulty.

(Insertion faulty)

(3) Thermistor wiring open or contact

faulty.

(4)Faulty refrigerant circuit, etc. has

caused thermistor temperature to rise to 90 °C or higher or drop to –40 °C or lower.

(5)Indoor controller board faulty.

Judgment method and remedy

(1)-(3)

Check thermistor resistance value

0 °C ...... 15.0 kΩ

10 °C ........ 9.7 kΩ

20 °C ........ 6.4 kΩ

30 °C ........ 5.3 kΩ

40 °C ........ 3.1 kΩ

Open or faulty contact can be detected by applying force (pulling, bending) to lead wire while measuring thermistor resistance.

(2)Check for connector faulty contact.

After reinserting connector, turn on power and recheck operation.

(4) Check remote controller room tempera-

ture display. If there is a difference between actual room temperature and displayed room temperature after checking that there are no problems at (1)-(3), replace indoor controller board. If there are no problems above, there are no abnormalities. Turn power off and on and operate.

(1)-(3)

Check thermistor resistance value. For characteristic, see above (P1).

(2)Check for connector faulty contact.

After reinserting connector, turn on power and recheck operation.

(4) Operate in trail run mode and check

piping temperature with remote controller. When piping temperature is abnormally low (cooling) or high (heating), refrigerant circuit is probably faulty.

(5)Check test run mode piping tempera-

ture with remote controller. If there is a difference between actual piping temperature and displayed piping temperature when there are no abnormalities at (1)-(4), replace indoor controller board. If there is no problem above, there are no abnor malities. Turn on power and operate.

Drain sensor abnormal

1) If thermistor short or open continuously detected for 30 seconds, the compressor enters the check mode and turns off and the indoor fan turns off.

2) When another short or open is continuously detected for 30 seconds in the check mode, an abnormality is recognized. (If returned, returns to normal operation.)

3) Always detected during cool, dry, and drain pump operation. Short: 90 °C or higher Open: –20 °C or lower

(1)Thermistor characteristics faulty. (2)Connector contact faulty.

(Insertion faulty)

(3)Drain sensor wiring open or contact

faulty.

(4)Indoor controller board faulty.

(1)-(3)

Check thermistor resistance value.

0 °C.... 6.0 kΩ

10 °C.... 3.9 kΩ

20 °C.... 2.6 kΩ

30 °C.... 1.8 kΩ

40 °C.... 1.3 kΩ

(2)Check connector for faulty contact.

After reinserting connector, turn on power and recheck operation.

(4)If abnormality reproduced by shorting

between drain sensor connector CN31 pins 1 and 2 and operating air conditioner, replace indoor controller board. If there are no problems above, there are no abnormalities. T

urn on power and operate.

Page 38

Abnormality display

Meaning of abnormality display and abnormality troubleshooting

Drain overflow protection operation

1) When the drain sensor thermistor overheats and the temperature rise is small, the compressor enters the check mode and is turned off and the indoor fan is turned off.

2) If the state above is detected again in the check mode, drain pump abnormality is recognized.

3) Always detected during drain pump operation.

Water leakage abnormality (PDH only)

1) When the drain sensor thermistor overheats and the temperature rise is small, the compressor enters the check mode and the drain pump is turned on for 6 minutes. (Detection: 1 time/hour)

2) If the state above is detected again within 12 hours after the check mode was entered, a water leakage abnormality is recognized.

3) Detected during stop, fan, and heat operation.

Cause

(1)Drain pump trouble. (2)Drain faulty.

Drain pump clogged. Drain pipe clogged.

(3)Water droplets on drain sensor.

Drain water waves created by transmission of drain water from lead wire, clogged filter, etc.

(4)Indoor controller board faulty.

(1)Water leaking from humidifier water

supply pipe. (2)Water droplets on drain sensor. (3)Indoor controller board faulty.

Judgment method and remedy

(1)Check drain up mechanism. (2)Check drain characteristic. (3)Check drain sensor lead wire arrange-

ment and check for filter clogging.

(4)If abnormality reproduced by shorting

between drain sensor connector CN31 pins 1 and 2 and operating air conditioner, replace indoor controller board. If there are no problems above, there are no abnormalities. Turn on the power and operate.

(1)Repair water leakage. (2)Check drain sensor lead wire arrange-

ment and check for filter clogging.

(3)If abnormality reproduced by shorting

between drain sensor connector CN31 pins 1 and 2 and operating air conditioner, replace indoor controller board. If there are no problems above, there are no abnormalities. Turn on power and operate.

Freezing/excessive rise protection operation

1) Freezing protection When the piping temperature remains at –15 °C or lo wer for 3 minutes after 3 minutes have elapsed since the compressor started, the compressor enters the 6 minutes restart prohibit mode and if the piping temperature again remains at –15 °C for 3 minutes within 16

minutes after 6 minutes restarting, an abnormality is recognized.

2) Excessive rise protection When a piping temperature rise to 70 °C or higher is detected after the compressor starts, the compressor enters the 6 minutes restart prohibit mode. If a piping temperature rise up to 70 °C or higher is detected again within 10 minutes after 6 minutes restarting, an abnormality is recognized.

<Cool and dry> (1)Filter is clogged (insufficient air flow). (2)Air duct short cycle. (3) Low load operation (low temperature)

exceeding allowable range. (4)Indoor fan motor faulty. (5)Outdoor fan control faulty (intermedi-

ate period, winter). (6)Refrigerant overcharged. (7)Refrigerant circuit faulty (clogged).

<Heat> (1)Filter clogged (insufficient air flow) (2)Air duct short cycle. (3) Overload operation (high tempera-

ture) exceeding allowable range. (4)Indoor fan motor faulty. (5)Outdoor fan control faulty (intermedi-

ate period) (6)Refrigerant overcharged. (7)Refrigerant circuit faulty (clogged) (8)Outdoor unit bypass circuit faulty.

<Cool and dry> (1)Check filter for clogging. (2)Remove obstruction. (4)Check fan motor operation and wind-

ing resistance. (5)Check outdoor fan motor operation. (6)(7)

Check refrigerant circuit operation.

<Heat> (1)Check filter for clogging. (2)Remove obstruction. (4)Check fan motor operation and wind-

ing resistance. (5)Check outdoor fan motor operation. (6)-(8)

Check refrigerant circuit operation.

Page 39

Abnormality display

Meaning of abnormality display and abnormality troubleshooting

Piping temperature abnormal

<Cool> When the piping temperature stays outside the cooling area for 1 minute after 3 minutes have elapsed since the compressor was started, the indoor fan operates at low speed. If the piping temperature does not return to the cooling area after 5 minutes operation at low speed, an abnormality is recognized. Note 1) It takes a minimum of 9 min-

utes for an abnormality to be detected.

Note 2) At dry operation, P8 abnor-

mality is not detected. <Heat> When the piping temperature falls outside the heating area and enters the ventilation area after compressor operation and the end of hot adjust, the indoor fan stops and the piping temperature does not return to the heating area within 20 minutes after 10 seconds have elapsed after it left the heating area, an abnormality is recognized. Note 3) It takes a minimum of 22

minutes and a maximum of

27 minutes for an abnormal-

ity to be detected. Note 4) Except during defrosting

(Detected again after de-

frosting return.)

Cause

(1)Indoor intake piping thermistor tem-

perature differential small.

- EInsufficient refrigerant

- EPiping thermistor holder dislodged.

- ERefrigerant circuit f aulty.

(2) Extension piping (When multiple units

connected).

(3) Indoor/outdoor connection wire

(When multiple units connected).

(4) Indoor intake piping thermistor detec-

tion faulty.

Judgment method and remedy

(1) Operate in test run mode and check

piping temperature.

(2)(3)

Check extension piping or indoor/outdoor connection wire.

(4) Check remote controller room tempera-

ture display and piping temperature in test run mode.

Piping (2-phase pipe) sensor abnormal

1) If thermistor short or open is de-

tected and the compressor enters the 3 minutes restart prevention mode and does not return to normal after 3 minutes, an abnormality is recognized. (If returned, returns to normal operation.)

2) Always detected during cool, dry,

and heat (except during defrosting) operation. Short: 90 °C or higher Open: –40 °C or lower

(1)Thermistor characteristics faulty. (2)Connector contact faulty.

(Insertion faulty)

(3) Thermistor wiring open or contact

faulty.

(4)Faulty refrigerant circuit, etc. has

caused thermistor temperature to rise to 90 °C or higher or drop to –40 °C or lower.

(5)Indoor controller board faulty.

(1)-(3)

Check thermistor resistance value. For characteristic, see above (P1).

(2)Check for connector faulty contact.

After reinserting connector, turn on power and recheck operation.

(4) Operate in trail run mode and check

piping temperature with remote controller. When piping temperature is abnormally low (cooling) or high (heating), refrigerant circuit is probably faulty.

(5)Check test run mode piping tempera-

Page 40

Abnormality display

Meaning of abnormality display and abnormality troubleshooting

Cause

Judgment method and remedy

Remote control communication receive abnormal

1) When the indoor controller board can not receive data normally from the remote controller or another indoor controller board even once in 3 minutes, an abnormal-

ity is recognized.

2) When the indoor controller board can not receive signals even once in 2 minutes, an abnormality is recognized.

(1)Remote controller transmission line

contact faulty.

(2)All remote controllers set as “slave”

remote controller.

(3) Remote controller send/receive circuit

faulty.

(4)Indoor controller board send/receive

circuit faulty.

(5) Noise entered on remote controller

transmission line.

(1)Check if indoor unit or remote control-

ler transmission line disconnected or loose.

(2)Set one remote controller as “master”.

When there are no problems at the

above (3)Perform remote controller diagnosis. a) [RC OK] display

Remote controller normal. Check by turning power off and on. If the abnormality occurs again, replace indoor controller board.

b) [RC NG] display

Replace remote controller.

c) [RC E3] display

[ERC00-66] noise, etc. is probable cause.

Page 41

the No.1 outdoor unit. (single system

(1) Repair cable A.

operation.) Change No.1 address to 01.

[Emergency Repair]

(1) Set to the No.2 address and cut the power to

Single system operation.

(1) Repair cable B.

[Emergency Repair]

(1) Cut power to outdoor unit No.2.

(1) Repair cable C

Correct cause of error.

Error Details Recommended Countermeasure

The outdoor unit for address 00 is no longer

connected to the system, and operation is not

possible as there is no power supply to the

remote controller, resulting in an error.

Error occurred at both No.2 system outdoor and

indoor unit and error occurs at remote controller.

Operation can be continued as no error has

occurred at system No.1, however, remote

controller operation is not possible other than at

stoppage. (No fan stoppage.)

Set to the No.2 address 00 and cut the power

to the No.1 outdoor unit. (single system

(1) Repair cable A.

The outdoor unit for address 00 is no longer

operation.) Change No.1 address to 01.

[Emergency Repair]

(1)

connected to the system, and operation is not

possible as there is no power supply to the

remote controller, resulting in an error.

Single system operation.

(1) Repair cable B.

[Emergency Repair]

(1) Cut power to outdoor unit No.2.

Error detected at both No.2 outdoor and indoor

unit, however, the remote controller cannot be

used during the stoppage, and therefore no

error is indicated.

No.1 system error stoppage.

No No.2 system stoppage.

Remote controller indicates error, however,

Communication error detected at No.1 and No.2

system indoor unit due to remote controller

error, and all systems stopped.

Communication error detected at No.2 system

indoor unit, however, no error reported at

remote controller when D breakage occurs.

Communication error detected at No.2 system

indoor unit, resulting in stoppage.

(1) Repair cable C

indoor unit, however, no error reported at

remote controller when D breakage occurs. No.2

system indoor unit due to remote controller

error, however, no error reported at remote

controller as inoperable during stoppage.

system cannot be operated.

remote controller operation is not possible other

No error occurs, therefore no countermeasures

possible.

Normal stoppage

No No.1 system stoppage.

No.2 system error stoppage.

Remote controller indicates error, however,

remote controller operation is not possible other

No No.1 system stoppage.

No.2 system error stoppage.

Remote controller indicates error, however,

remote controller operation is not possible other

than at stoppage. (No fan stoppage.)

No error occurs, therefore no countermeasures

possible.

Normal stoppage

than at stoppage. (Fan stoppage.)

No error occurs, therefore no countermeasures

possible.

Normal stoppage

No. 1 system indoor/outdoor unit transmission cable.

No. 2 system indoor/outdoor unit transmission cable.

Remote controller cable for board No.1 (communication of operation and control details).

Cable connecting No.1 and No.2 board (communication of operation and control details)

:::

Outdoor unit No.2

Address: 01

Outdoor unit No.1

Address: 00

No.2 board

Indoor unit

No.1 board

* Error countermeasures for PEH-16·20

Error Details Recommended Countermeasure Error Details Recommended Countermeasure

Prior to power ON to boot-up Stoppage (power supplied) During Operation

Remote controller

to the No.1 outdoor unit. (single system

operation.) Change No.1 address to 01.

Set to the No.2 address 00 and cut the power

(1) Repair cable A.

[Emergency Repair]

(1)

The outdoor unit for address 00 is no longer

connected to the system, and operation is not

possible as there is no power supply to the

remote controller. Error can be confirmed at

outdoor unit LED.

Cable A

breakage,

reverse

connection

Wiring Errors

Single system operation.

(1) Repair cable B.

[Emergency Repair]

(1) Cut power to outdoor unit No.2.

Unable to boot up system No.2 and error

detected at both the outdoor and indoor unit,

however, the remote controller cannot be used

during the stoppage, and therefore no error is

indicated. Error can be confirmed at outdoor unit

LED.

(No.1 system has booted up and therefore

operation is possible.)

Cable B

breakage,

reverse

connection

(1) Repair cable C Communication error detected at No.1 and No.2

No power to remote controller and so

Cable C

(1) Repair cable D Communication error detected at No.2 system

Communication error detected at No.2 system

indoor unit, however, no error reported at

remote controller when D breakage occurs.

Error can be confirmed at outdoor unit LED.

(No.1 system has booted up and therefore

inoperable.

Error can be confirmed at outdoor unit LED.

breakage,

reverse

connection

Cable D

breakage,

operation is possible.)

reverse

connection

No error occurs, therefore no countermeasures

possible.

Normal boot-up completed.

No.1 system

error

Refrigerant

Related Errors

No error occurs, therefore no countermeasures

possible.

Normal boot-up completed.

No.2 system

error

possible.

Normal boot-up completed.

51F error

Page 42

Symptom and operation when normal

Cause

Symptom judgment and remedy

1. No remote controller display

2. Remote controller displays “PLEASE WAIT” unchanged.

3. When remote controller operation switch pressed, operation display appears but immediately disappears.

(1)DC14V is not supplied to remote con-

troller. (No power O display on liquid crystal panel.)

(2)DC14V is supplied to remote controller

but nothing is displayed.

- “PLEASE W AIT” not displayed

- “PLEASE W AIT ” displayed

(1)Remote controller displays

“PLEASE WAIT” for maximum of 2 minutes for starting after power turned on.

(2) Indoor-remote controller communication

faulty.

(3)Outdoor-indoor communication faulty.

(1) Operation switch is disabled for approxi-

mately 30 seconds after function select operation from remote controller is released.

(1) Check LED2 on indoor controller board.

1)Steady light Check remote controller wire open or faulty contact.

2)Flashing Check for remote controller wire short.

3)Not lit Check outdoor controller refrigerant address .

(2) Make the following judgment:

- When “PLEASE WAIT” is not displayed, remote controller is faulty.

- When “PLEASE WAIT” is displayed, see item 2.

(1)Normal operation. (2)Remote controller self-diagnosis. (3)When outdoor-indoor cannot communicate

“PLEASE WAIT” is displayed for a maximum 6 minutes.

Check LED3 on indoor controller board.

1) Does not flash

Check indoor/outdoor connection cable for erroneous wiring. (S1 and S2 or S3 open)

2) Flashes

Indoor/outdoor connection cable is normal.

(1)Normal operation.

4. Does not beep and air conditioner does not operate even when operated with wireless remote controller. (Operation display appears on wireless remote controller.)

5. When operated with wireless remote controller, beeps but does not operate.

6. Remote controller display is normal and cooling operation is performed, but without any capacity (does not cool).

(1)Wireless remote controller and indoor

controller board pair number setting mismatched.

(2)Cause of item 1.

(1)Air conditioner does not operate for a

maximum of 2 minutes after the power is turned on.

(2)Set to local operation prohibit mode.

- Remote star t/stop adapter is connected to CN32 on indoor controller board.

- Air conditioner is connected to MELANS and is set to local operation prohibit mode from centralized controller, etc.

(3)Cause of item 2. (1)Insufficient refrigerant.

(2)Filter clogged. (3)Outdoor unit heat exchanger clogged. (4)Air duct short cycle. (5)Outdoor unit bypass circuit faulty.

(1)Check pair number setting. (2)Item check of item 1.

(1)Normal operation. (2)Normal operation. (3)Item check of item 2.

(1) - When there is leakage, discharge tempera-

ture rises. Therefore, check by measuring temperature.

- Check for gas leakage from piping connections, etc.

(2)Open intake grille and check filter. Clean filter,

and remove dust and dirt.

(3) - Since both indoor piping temperature and

outlet pressure rise when filter clogged, judge by measuring outlet pressure.

- Clean heat exchanger. (4)Remove obstruction. (5)

Check refrigerant circuit operation state.

Page 43

Symptom and operation when normal

Cause

Symptom judgment and remedy

7. Remote controller display is normal and heating operation is performed

but without any capacity (does no

heat).

(1)Insufficient refrigerant. (2)Refrigerant piping heat insulation insuf-

ficient.

(3)Filter clogged. (4)Indoor unit heat exchanger clogged. (5)Air duct short cycle. (6)Outdoor unit bypass circuit faulty.

(1) - Since the discharge temperature rises when

there is leakage, judge by measuring the temperature.

- Check piping connections, etc. for gas leakage.

(2) Check heat insulation. (3) Open intake grille and check filter.

Clean filter, and remove dust and dirt.

(4) - Since the indoor piping temperature and out-

let pressure rise when the heat exchanger is clogged, judge by measuring the outlet pressure.

- Clean heat exchanger.

(5) Remove obstruction. (6)

Check refrigerant circuit operation state.

Page 44

Erroneous wiring contents Remarks

Outdoor side

S1 S2 S3

Outdoor side

S1 S2 S3

Outdoor side

S1 S2 S3

Outdoor side

S1 S2 S3

Outdoor side

S1 S2 S3

Outdoor side

S1 S2 S3

Outdoor side

S1 S2 S3

Outdoor side

S1 S2 S3

Outdoor side

S1 S2 S3

Indoor

side

S1 S2 S3

side

S1 S2 S3

side

S1 S2 S3

side

S1 S2 S3

side

S1 S2 S3

side

S1 S2 S3

side

S1 S2 S3

side

S1 S2 S3

side

S1 S2 S3

Condition

Trial run

(relocation)

Trial run

relocation

Trial run

relocation

Trial run

relocation

Trial run

relocation

Trial run

relocation

Trial run

relocation

Trial run

relocation

Trial run

relocation

Remote control-

ler display

“ ” Powe r

supply mark

No display

Indoor controller board

LED display

LED1

Off

LED2

Off

LED3

Flashing

Outdoor controller

board LED display

Off

(after 4 minutes)

Normal

wiring

Open

between S1

Open

between S2

Open

between S3

Page 45

16 SIMPLE PARTS CHECK METHOD

ose

etheresistance

)

easure

evaluerosshe te

ead

0120

ce s

010

810.8

)

easure

evaluerossthete

)

59PUH-8

3PU

Part nam

utdoor uni

Thermistor (TH1) <Liqui temperature detection Thermistor (TH2 <Discharge temperatur

tection

utdoor unit Fan motor

Thermal protecto trip 1

90C

ope

Whit

Compresso

Disconnect th

Ambient 10t

utdoo

Norm

4.3~9.

~41

Based

Motor l

Between

wir

phase

temperature 25C

H-1

Judgment instruction

Abnorm

Openrhor

Norm

haracteristictabl

Abnorm

Openrhor

Normal

1.2

rminalswith

Each phas

valuewith

multimet

Abnorm

Open Open

multimet

indin

hor hor

Low temperature thermisto

Thermistor <Liquid temperature

Thermistor Ro=1

onstant = 3,460

Rt=15exp

1 2 25

3,460

tection>

TH1

n t i

-20-1010204

emperature

High temperature thermisto

Thermistor<Discharge temperature

ThermistorR120=7.4

onstant = 4,057

Rt=7.465exp

4,057

17.

tection>

n t i

TH2

emperature

Page 46

Heat exchanger

Pressure switch 63H1

Pressure switch 63H2

Accumulator

Capillary tube

Pressure switch 63L

Capillary tube

Check valve

Capillary tube for cooling

Capillary tube

Liquid pipe thermistor (TH1)

Detailed View of Section A

Solenoid valve coil Solenoid valve

Strainer

4-way valve

4-way valve coil

Compressor

Crankcase heater

Ball valve

Discharge thermistor (TH2)

Service port

Capillary tube for cooling

• PUH-8, 10YKA

17 PARTS NAME

Page 47

Control box parts

Main board

F.C. Board Transformar (TR)

Magnetic contactor for compressor (52C)

N.F. Board

Power source terminal block

Terminal block for defrosting signal

Terminal block for outdoor/indoor comminication

Page 48

18 OPTIONAL PARTS

Item Individual order number Remark 1 Outlet grill PAC-SG208SG-E 2 pcs/pack 2 Pressure gauge PAC-SK209PG-E 1 pcs/pack 3 M-NET adaptor PAC-SF80MA-E

Page 49

Page 50

New publication, effective July. 2007 Specifications subject to change without notice.

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

Mitsubishi PUH-8YKA, PUH-10YKA Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual