Mitsubishi OC338C Service Manual

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

SERVICE MANUAL

R410A

Outdoor unit [model names]

PUHZ-RP200YHA

[Service Ref.]

PUHZ-RP200YHA

May 2007

No.OC338

REVISED EDITION-C

Revision:

PUHZ-RP200/250YHA2are

· added in REVISED EDITION-C.

· Some descriptions have been

modified.

PUHZ-RP250YHA

PUHZ-RP200YHA1 PUHZ-RP200YHA2 PUHZ-RP250YHA PUHZ-RP250YHA1 PUHZ-RP250YHA2

CONTENTS

1. TECHNICAL CHANGES······································2

2. REFERENCE MANUAL ·······································2

3. SAFETY PRECAUTION·······································3

4. FEATURES···························································7

5. SPECIFICATIONS ················································8

6. DATA ····································································9

7. OUTLINES AND DIMENSIONS·························12

8. WIRING DIAGRAM············································13

9. WIRING SPECIFICATIONS ·······························14

10. SPECIFICATIONS FOR ELECTRICAL WORK·····15

11.

REFRIGERANT SYSTEM DIAGRAM

12. TROUBLESHOOTING········································21

13. FUNCTION SETTING ·········································70

14. EASY MAINTENANCE FUNCTION ···················77

15.

MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER

Model name indication

PUHZ-RP200YHA PUHZ-RP200YHA1 PUHZ-RP200YHA2 PUHZ-RP250YHA PUHZ-RP250YHA1 PUHZ-RP250YHA2

16. DISASSEMBLY PROCEDURE ··························90

17. PARTS LIST ·······················································98

18. RoHS PARTS LIST ··········································104

· Please void OC338 REVISED EDITION-B.

NOTE:

• This manual describes only service data of the outdoor units.

• RoHS compliant products have <G> mark on the spec name plate.

• For servicing of RoHS

compliant products, refer to

the RoHS Parts List.

···················19

···80

Model name Service Ref.

PLA-RP35/50/60/71AA

PLA-RP35/50/60/71AA.UK

OC335

PLA-RP35/50/60/71/100/125/140BA

PLA-RP35/50/60/71/100/125/140BA.UK

OCHA12

OCB412

PLA-RP100/125/140AA2

PLA-RP100/125/140AA2.UK

OC357

PCA-RP50/60/71/100/125/140GA OC328 PCA-RP50GA2

PCA-RP50/60/71/100/125/140GA PCA-RP50GA2

PCA-RP71/125HA PCA-RP71/125HA OC329

PKA-RP35/50GAL PKA-RP35/50GAL OC330

PKA-RP60/71/100FAL PKA-RP50FAL2

OC331

PEAD-RP35/50/60/71EA(2)

PEAD-RP35/50/60/71EA(2).UK -

PEAD-RP100/125/140EA(2)

PEAD-RP100/125/140EA(2).UK

PEAD-RP60/71/100GA PEAD-RP60/71/100GA.UK

PEH-RP200/250MYA PEH-RP200/250MYA

2-2. TECHNICAL DATA BOOK

Manual No. OCS01

Service Manual No.

TECHNICAL CHANGES

PUHZ-RP200YHA1

PUHZ-RP200YHA2

PUHZ-RP250YHA1 PUHZ-RP250YHA2

• CONTROLLER CIRCUIT BOARD (C.B.) has been changed.

PUHZ-RP200YHA

PUHZ-RP200YHA1

PUHZ-RP250YHA PUHZ-RP250YHA1

The parts below have been changed.

• 4-WAY VALVE AND COIL (21S4)

• BYPASS VALVE AND COIL (SV)

REFERENCE MANUAL

2-1. INDOOR UNIT’S SERVICE MANUAL

3 SAFETY PRECAUTION

Use new refrigerant pipes.

Make sure that the inside and outside of refrigerant piping is clean and it has no contamination such as sulfur hazardous for use, oxides, dirt, shaving particles, etc. In addition, use pipes with specified thickness.

Store the piping to be used during installation indoors and keep both ends of the piping sealed until just before brazing. (Leave elbow joints, etc. in their packaging.)

Use ester oil, ether oil or alkylbenzene oil (small amount) as the refrigerant oil applied to flares and flange connections.

In case of using the existing pipes for R22, be careful with the followings.

· Change flare nut to the one provided with this product. Use a newly flared pipe.

· Avoid using thin pipes.

Charge refrigerant from liquid phase of gas cylinder.

If the refrigerant is charged from gas phase, composition change may occur in refrigerant and the efficiency will be lowered.

Do not use refrigerant other than R410A.

If other refrigerant (R22 etc.) is used, chlorine in refrigerant can cause deterioration of refrigerant oil etc.

Use a vacuum pump with a reverse flow check valve.

Vacuum pump oil may flow back into refrigerant cycle and that can cause deterioration of refrigerant oil etc.

Use the following tools specifically designed for use with R410A refrigerant.

The following tools are necessary to use R410A refrigerant.

Keep the tools with care.

If dirt, dust or moisture enters into refrigerant cycle, that can cause deterioration of refrigerant oil or malfunction of compressor.

Do not use a charging cylinder.

If a charging cylinder is used, the composition of refrigerant will change and the efficiency will be lowered.

Flare tool

Electronic refrigerant charging scale

Vacuum pump adaptor

Size adjustment gauge

Gauge manifold

Torque wrench

Gas leak detector

Charge hose

Tools for R410A

Contamination inside refrigerant piping can cause deterioration of refrigerant oil etc.

If dirt, dust or moisture enters into refrigerant cycle, that can cause deterioration of refrigerant oil or malfunction of compressor.

If large amount of mineral oil enters, that can cause deterioration of refrigerant oil etc.

Ventilate the room if refrigerant leaks during operation. If refrigerant comes into contact with a flame, poisonous gases will be released.

3-1. ALWAYS OBSERVE FOR SAFETY

Before obtaining access to terminals, all supply circuits must disconnected.

3-2. CAUTIONS RELATED TO NEW REFRIGERANT

Cautions for units utilizing refrigerant R410A

[1] Cautions for service

(1) Perform service after collecting the refrigerant left in unit completely. (2) Do not release refrigerant in the air. (3) After completing service, charge the cycle with specified amount of refrigerant. (4) When performing service, install a filter drier simultaneously.

Be sure to use a filter drier for new refrigerant.

[2] Additional refrigerant charge

When charging directly from cylinder

· Check that cylinder for R410A on the market is syphon type.

· Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)

Unit

Gravimeter

[3] Service tools

Use the below service tools as exclusive tools for R410A refrigerant.

No. Specifications

1 Gauge manifold ·Only for R410A

·Use the existing fitting

·Use high-tension side pressure of 5.3MPa·G or over.

2 Charge hose ·Only for R410A

·Use pressure performance of 5.09MPa·G or over.

3 Electronic scale 4 Gas leak detector ·Use the detector for R134a, R407C or R410A. 5 Adaptor for reverse flow check ·Attach on vacuum pump. 6 Refrigerant charge base 7 Refrigerant cylinder ·Only for R410A Top of cylinder (Pink)

8 Refrigerant recovery equipment

specifications

Cylinder with syphon

. (UNF1/2)

3-3. CHANGED POINT

Measure the existing pipe thickness and check for damage.

The existing pipe thickness meets specifications and the pipes are not damaged.

The existing pipe thickness does not meet specifications or the pipes are damaged.

Check if the existing air conditioner can operate.

The existing air conditioner can operate. The existing air conditioner cannot operate.

After operating the cooling system for about 30 minutes, do a pump down work.

Use a refrigerant collecting device to collect the refrigerant.

Check the oil condition when collecting the refrigerant.

Oil is clean. (Clear to brownish color)

Oil is dirty. (Black color)

When the compressor bearings are glazed, rotation scratches are present, or the compressor breaks down, iron particles or oil deterioration will blacken the oil.

Disconnect the existing air conditioner from the pipes.

The existing piping can be reused. After flaring the pipes again, connect the new air conditioner.

The existing pipes cannot be reused. Use new pipes.

Perform the following inspections: air tightness test, vacuum dryness (additional refrigerant charge), gas leakage check

Replacement operation

Test operation

Replacement operation is the operation by which impurities remaining in the existing piping (chlorinated compounds) are captured by the activated carbon filter (replacement filter) in the outdoor unit.

• This model will automatically begin the replacement operation after it has been installed when it enters the initialization phase for normal heating or cooling. However , the unit will not automatically perf orm the replacement operation if it is moved to a new location where it will be used with existing R22 refrigerant piping. Under such conditions, always use the SW8-2 operations to perform the replacement operation before beginning the test operation.

• Precautions when reusing existing R22 refrigerant pipes (1) Flowchart

Connecting a new air conditioner to existing R22 refrigerant pipes

1 Flare the pipe for the use with R410A refrigerant.

Use the flare nut attached to indoor and outdoor unit of the new air conditioner only.

2 When reusing existing R22 refrigerant pipes of which gas pipe is [28.58mm and, in addition, when the outdoor unit is

installed to lower position than the indoor unit, be sure to change the setting of the DIP SW8-1 on the controller circuit board of the outdoor unit to ON.

✽ This is to increase the speed of refrigerant passing in the gas pipe so that refrigerant oil can smoothly flow in the system.

• Use a different-diameter joint or brazing for the connection.

3 When reusing standard-size existing R22 refrigerant pipes.

The pipes can be reused with pipe length restriction described on TECHNICAL DATA BOOK (OCS01).

(2) Cautions for refrigerant piping work

1/4” 3/8” 1/2” 5/8” 3/4”

7/8”

1”

1”-1/8”

6.35

9.52

12.70

15.88

19.05

22.20

25.40

28.58

0.8

1.0

— — — —

0.8

1.0

Nominal

dimensions

Diagram below: Piping diameter and thickness

Outside

diameter

(mm)

Thickness

(mm)

R410A R22

1/4” 3/8” 1/2” 5/8” 3/4”

6.35

9.52

12.70

15.88

19.05

9.1

13.2

16.6

19.7

—

9.0

13.0

16.2

19.4

23.3

Nominal

dimensions

Flare cutting dimensions

Outside

diameter

Dimension A

( )

-0.4

(mm)

R410A R22

1/4” 3/8” 1/2” 5/8” 3/4”

6.35

9.52

12.70

15.88

19.05

17.0

22.0

26.0

29.0

—

17.0

22.0

24.0

27.0

36.0

Nominal

dimensions

Flare nut dimensions

Outside

diameter

Dimension B

(mm)

R410A

w36.0mm for

indoor unit of RP100, 125 and 140

R22

Gauge manifold Charge hose Gas leak detector

Refrigerant recovery equipment Refrigerant cylinder Applied oil

Safety charger

Charge valve Vacuum pump

Flare tool

Bender Pipe cutter Welder and nitrogen gas cylinder Refrigerant charging scale

Vacuum gauge or thermistor vacuum gauge and vacuum valve Charging cylinder

Air purge, refrigerant charge and operation check Gas leak check

Collection of refrigerant Refrigerant charge

Apply to flared section Prevent compressor malfunction

when charging refrigerant by spraying liquid refrigerant

Prevent gas from blowing out when detaching charge hose

Vacuum drying and air purge

Flaring work of piping

Bend the pipes Cut the pipes Weld the pipes Charge refrigerant Check the degree of vacuum. (Vacuum

valve prevents back flow of oil and refrigerant to thermistor vacuum gauge) Charge refrigerant

Tool exclusive for R410A Tool exclusive for R410A Tool for HFC refrigerant Tool exclusive for R410A Tool exclusive for R410A Ester oil and alkylbenzene oil (minimum amount) Tool exclusive for R410A

Tool exclusive for R410A Tools for other refrigerants can

be used if equipped with adopter for reverse flow check Tools for other refrigerants

can be used by adjusting flaring dimension Tools for other refrigerants can be used Tools for other refrigerants can be used Tools for other refrigerants can be used Tools for other refrigerants can be used Tools for other refrigerants can be used

Tool exclusive for R410A



Tools and materials Use R410A tools Can R22 tools be used?

(Usable if equipped

with adopter for rever se flow)

(Usable by adjusting flaring dimension)

Can R407C tools be used?

Ester oil: Alkylbenzene oil: minimum amount

(Usable if equipped

with adopter for rever se flow)

(Usable by adjusting

flaring dimension)

: Prepare a new tool. (Use the new tool as the tool exclusive for R410A.) : Tools for other refrigerants can be used under certain conditions. : Tools for other refrigerants can be used.

New refrigerant R410A is adopted for replacement inverter series. Although the refrigerant piping work for R410Ais same as for R22, exclusive tools are necessary so as not to mix with different kind of refrigerant. Furthermore as the working pressure of R410A is 1.6 time higher than that of R22, their sizes of flared sections and flare nuts are different.

1Thickness of pipes

Because the working pressure of R410A is higher compared to R22, be sure to use refrigerant piping with thickness shown below. (Never use pipes of 0.7mm or below.)

2Dimensions of flare cutting and flare nut

The component molecules in HFC refrigerant are smaller compared to conventional refrigerants. In addition to that, R410A is a refrigerant, which has higher risk of leakage because of its working pressure higher than that of other refrigerants. Therefore, to enhance airtightness and intensity, flare cutting dimension of copper pipe for R410A have been specified separately from the dimensions for other refrigerants as shown below. The dimension B of flare nut for R410A also have partly been changed to increase intensity as shown below. Set copper pipe correctly referring to copper pipe flaring dimensions for R410A below. For 1/2” and 5/8”, the dimension B changes. Use torque wrench corresponding to each dimension.

Dimension A

3Tools for R410A (The following table shows whether conventional tools can be used or not.)

Dimension B

4 FEATURES

Indoor unit

Outdoor unit

PUHZ-RP·YHA

200 250

PEH-RP·MYA

Indoor unit

Outdoor unit

PUHZ-RP·YHA

200 250

PLA-RP100AA2 ✕ 2 PLA-RP125AA2✕ 2 PEAD-RP100EA2✕ 2 PEAD-RP125EA ✕ 2 PEAD-RP100GA ✕ 2 PKA-RP100FAL ✕ 2 PCA-RP100GA ✕ 2 PCA-RP125GA ✕ 2

Indoor unit

Outdoor unit

PUHZ-RP·YHA

200 250

PLA-RP60AA ✕ 3 PLA-RP71AA ✕ 3 PEAD-RP60EA ✕ 3 PEAD-RP71EA ✕ 3 PEAD-RP60GA ✕ 3 PEAD-RP71GA ✕ 3 PKA-RP60FAL ✕ 3 PKA-RP71FAL ✕ 3 PCA-RP60GA ✕ 3 PCA-RP71GA ✕ 3

Indoor unit

Outdoor unit

PUHZ-RP·YHA

200 250

PLA-RP50AA ✕ 4 PLA-RP60AA ✕ 4 PEAD-RP50EA ✕ 4 PEAD-RP60EA ✕ 4 PEAD-RP60GA ✕ 4 PKA-RP50GAL ✕ 4 PKA-RP50FAL2 ✕ 4 PKA-RP60FAL ✕ 4 PCA-RP50GA(2) ✕ 4 PCA-RP60GA ✕ 4

Ratio of distributing Part No. Synchronized twin 50:50 MSDD-50WR-E Synchronized triple 33:33:33 MSDT-111R-E Synchronized quadruple 25:25:25:25 MSDF-1111R-E

PLA-RP50BA ✕ 4 PLA-RP60BA ✕ 4

PLA-RP100BA ✕ 2 PLA-RP125BA✕ 2

PLA-RP60BA ✕ 3 PLA-RP71BA ✕ 3

PCA-RP125HA ✕ 2

PCA-RP71HA ✕ 3

4-1. COMBINATION OF INDOOR AND OUT DOOR UNITS

4-1-1. 1:1 SYSTEM

4-1-2. SYNCHRONIZED TWIN, TRIPLE AND QUADRUPLE SYSTEM (1) Synchronized twin (50:50)

(2) Synchronized triple (33:33:33)

(3)

Synchronized quadruple (25:25:25:25)

4-1-3. MULTI DISTRIBUTION PIPE (OPTION)

4-2. FEATURES

CHARGELESS SYSTEM PRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT. (Max.30m)

The refrigerant circuit with LEV(Linear Expansion Valve) and accumulator always control the optimal refrigerant level regardless of the length (30m max. and 5m min.) of piping. The additional refrigerant charging work during installation often causes problems. It is completely eliminated by chargeless system. This unique system improves the quality and reliability of the work done.It also helps to speed up the installation time.

PUHZ-RP200YHA PUHZ-RP200YHA1 PUHZ-RP200YHA2 PUHZ-RP250YHA PUHZ-RP250YHA1 PUHZ-RP250YHA2

5 SPECIFICATIONS

Service Ref.

Mode Capacity

Power supply (phase, cycle, voltage)

Running current

External finish Refrigerant control Compressor

Crankcase heater Heat exchanger Fan Fan(drive) o No.

Defrost method

OUTDOOR UNIT

Noise level Dimensions

Weight Refrigerant

Pipe size O.D. Connection method Between the indoor &

outdoor unit

REFRIGERANT PIPING

Max. current

Model Motor output Starter type Protection devices

Fan motor output Airflow

Charge Oil (Model)

/min(CFM

Cooling Heating

D H

Liquid

Gas Indoor side Outdoor side Height difference Piping length

mm(in.) mm(in.) mm(in.)

kg(lbs)

mm(in.) mm(in.)

Btu/h

A A

dB dB

Cooling

19.0(10.0~22.4)

)

PUHZ-RP200YHA PUHZ-RP200YHA1 PUHZ-RP200YHA2

64,800

10.0

9.52(3/8)

25.4(1)

PUHZ-RP250YHA PUHZ-RP250YHA1 PUHZ-RP250YHA2

Heating

76,400

22.4(10.0~25.0) 3-ph, 50Hz, 400V (4wires)

10.4

Munsell 3Y 7.8/1.1

Linear Expansion Valve

Hermetic

ANV47FFBMT

4.5 Line start

HP switch, LP switch, Discharge thermo

Plate fin coil

Propeller fan o 1

0.635

150(5,300)

Reverse cycle 55 56

900(35-7/16)

750(29-17/32)

1,798(70-25/32)

198(436)

R410A

10.5(23.1)

2.30(MEL56)

Flared

Flared & Brazing

Max. 40m

Max. 120m

Cooling

75,000

22.0(12.5~28.0)

11.5

—

Heating

92,100

27.0(15.7~31.5)

12.4

5.5

58 58

12.7(1/2)

28.58(1-1/8)

6 DATA

6-1. ELECTRICAL PARTS SPECIFICATIONS

Outdoor unit

Parts name

FUSE

(FUSE1,2)

PUHZ-RP200YHA PUHZ-RP250YHA

PUHZ-RP200YHA1/YHA2 PUHZ-RP250YHA1/YHA2

250V 15A

FUSE (F 3,4)

Solenoid Valve

(Four-way Valve)

Solenoid Valve Coil

(Four-way Valve)

21S4

Linear Expansion

Valve

(LEV-A)

Linear Expansion

Valve Coil

(LEV-A)

Solenoid Valve

Solenoid Valve Coil

(SV)

Reactor

(DCL)

High Pressure

Switch

(63H)

Low Pressure

Switch

(63L)

VT60100

LB64 AC220~240V

(DM50G461)

VF20100

LD2 AC220~240V

250V 6.3A

STF0731Z

STF AC220~240V

(BG50T388)

HAM-BD32

(0~480 Pulse)

DC12V

FDF6A-008-RK

AC220~240V

2.7mH 25A

OFF 3.60+0.2MPa

ON 2.80i0.15MPa

OFF -0.03i0.03MPa

ON 0.05i0.04MPa

Fan Motor

(MF)

Thermistor

(Outdoor Pipe)

(TH3, TH32 )

Thermistor

(Discharge)

(TH4)

Thermistor

(Outdoor2-PhasePipe)

(TH6)

Thermistor

(Outdoor)

(TH7)

Terminal Block

(Power Supply)

(TB1)

Terminal Block

(Indoor / Outdoor)

(TB2)

Main Smoothing Capacitor

(CB1, CB2)

Rush Current

Protect Resister

(RS)

6P 635W o1

PA6Y635-T

0:/15t, 10:/9.6t, 20:/6.3t, 25:/5.4t, 30:/4.3t, 40:/3.0t

20:/250t, 30:/160t, 40:/104t, 50:/70t, 60:/48t, 70:/34t, 80:/24t, 90:/15t, 100:/13t



0:/15t, 10:/9.6t, 20:/6.3t, 25:/5.4t, 30:/4.3t, 40:/3.0t

(L1, L2, L3, N, )

(S1, S2, S3)

2200= 400V

16" 30W

Motor Compressor

(MC)

ANV47FFBMT

6-2. COMPRESSOR TECHNICAL DATA

U-V U-W W-V

Unit

Compressor model

Winding

Resistance

( " )

ANV47FFBMT

(at 20°C)

0.72

PUHZ-RP200, 250YHA PUHZ-RP200, 250YHA

PUHZ-RP200, 250YHA2

MICROPHONE

UNIT

GROUND

63 125 250 500 1000 2000 4000 8000

APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE

OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)

BAND CENTER FREQUENCIES, Hz

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

PUHZ-RP200YHA PUHZ-RP200YHA

PUHZ-RP200YHA2

COOLING

MODE

HEATING

55.0

SPL(dB)

56.0

LINE

63 125 250 500 1000 2000 4000 8000

APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE

OCTAVE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µbar)

BAND CENTER FREQUENCIES, Hz

NC-60

NC-50

NC-40

NC-30

NC-20

NC-70

PUHZ-RP250YHA PUHZ-RP250YHA

PUHZ-RP250YHA2

COOLING

MODE

HEATING

58.0

SPL(dB)

58.0

LINE

6-3. NOISE CRITERION CURVES

6-4. STANDARD OPERATION DATA

The unit of pressure has been charged to MPa based on international SI system. The converesion factor is : 1(MPa)=10.2(kgf/cm

)

PEH-RP250MYAPEH-RP200MYA

Indoor unit

3, 503, 50

400400

0.940.65

1.641.12

PUHZ-RP250YHA PUHZ-RP250YHA1 PUHZ-RP250YHA2

PUHZ-RP200YHA PUHZ-RP200YHA1 PUHZ-RP200YHA2

3, 503, 50

400400

HeatingCoolingHeatingCooling

Representative matching Mode

11.9812.0110.1510.63

67.170.271.373.0

38.747.841.447.1

3.014.64.712.2 5555

20272027 15191519

37.015.338.814.7 735735 624624

D.B.

W.B.

D.B. D.B.

W.B.

0.820.75

0.150.18

SHF BF

2.27

(23.2)

2.86

(29.2)

2.59

(26.4)

2.81

(28.7)

0.63

(6.4)

0.96 (9.8)

0.69 (7.0)

0.92

(9.4)

Phase, Hz Voltage Input Current Outdoor unit

Phase, Hz Voltage Current

Discharge temreature Condensing temreature Suction temreature Ref. pipe length Intake air temreature

Discharge air temreature Intake air temreature

Discharge pressure

Suction pressure

˚C ˚C ˚C

˚C ˚C ˚C ˚C ˚C

MPa

(kgf/cm

)

MPa

(kgf/cm

)

Outdoor

side

Indoor

side

Refrigerant circuit Electrical circuit

Amount of additional refrigerant charge (kg)

30 m and less 31-40 m and less 41-50 m and less 51-60 m and less 61-70 m and less 71-120 m and less

0.9 kg 1.8 kg 2.7 kg 3.6 kg

1.2 kg 2.4 kg 3.6 kg 4.8 kg

Outdoor unit

Permitted pipe length

RP200

RP250

120m or less

At time of shipping

(kg)

10.5

No additional

charge necessary

The additional charge amount is obtained by the following formula.

Main piping: Liquid line size [9.52 overall length [m]

0.09

[kg/m]

Branch piping: Liquid line size [9.52 overall length [m] o 0.06 [kg/m]

Branch piping: Liquid line size [6.35 overall length [m] o 0.02 [kg/m]

3.6 (kg)

Amount of additional charge [kg]

Main piping: Liquid line size [12.7 over all length [m] o 0.12 [kg/m]

Additional charge amount for 70 m

RP200 3.6 kg RP250 4.8 kg

+–

Calculate the additional charge amount based on the following procedure. If the calculation results in an amount that is smaller than the "Additional charge amount for 70m," perform the additional charge using the amount shown in "Additional charge amount for 70m."

6-5. ADJUSTING THE AMOUNT OF REFRIGERANT

7 OUTLINES AND DIMENSIONS

PUHZ-RP200YHA PUHZ-RP200YHA1 PUHZ-RP200YHA2 PUHZ-RP250YHA PUHZ-RP250YHA1 PUHZ-RP250YHA2

Refrigerant LIQUID PIPE connection (FLARE)

28.58

25.4

[

O.D

12.7 (1/2F)

9.52 (3/8F)

[

250YHA

200YHA

Refrigerant GAS PIPE connection (BRAZING)

AIR FLOW

110

Unit : mm

(Rear Side)

Service panel

380

200

195821

780

736

Piping Hole([ 122 Knock-OUT)

42 48

191

AIR INTAKE

[

375

218

Drain Hole(4-[10)

460

140

Wiring Hole([27 Knock-OUT)

Wiring Hole([40 Knock-OUT)

736 750

(780)

123 105

Drain Hole

317

120

560

900

700~796

FOUNDATION BOLTS PITCH & DRAIN HOLES

1798

900 750

Piping Hole (Knock-OUT)

180

Front side

161

(22)

1519

1457

MITSUBISHI

ELECTRIC

667

150

(Front Side)

Service panel

Indoor/Outdoor Wiring

Wiring Hole([ 27 Knock-OUT)

Wiring Hole([ 40 Knock-OUT)

4350364

25.4

[

Piping Hole([ 122 Knock-OUT)

Wiring Hole([ 40 Knock-OUT)

Wiring Hole([ 27 Knock-OUT)

200

Power supply Wiring (Earth wiring)

152

Wiring Hole([ 27 Knock-OUT)

Wiring Hole([ 40 Knock-OUT)

8 WIRING DIAGRAM

PUHZ-RP200YHA PUHZ-RP200YHA1 PUHZ-RP200YHA2 PUHZ-RP250YHA PUHZ-RP250YHA1 PUHZ-RP250YHA2

SYMBOL NAME TB1 TB2 Terminal Block (Indoor/Outdoor) MC MF 21S4 SV Solenoid Valve (Bypass Valve) 63H 63L TH3 TH32 TH4 TH6 TH7 LEV DCL CB1,CB2 RS FUSE1,FUSE2 P.B.

N.F.

F.C.

C.B.

Terminal Block (Power Supply) Motor Compressor

Fan Motor

Solenoid Valve (Four-Way Valve)

High Pressure Switch Low Pressure Switch

Thermistor (Outdoor Pipe) Thermistor (Outdoor Pipe)

Thermistor (Discharge) Thermistor (Outdoor 2-Phase Pipe) Thermistor (Outdoor) Linear Expansion Valve

Reactor Main Smoothing Capacitor Rush Current Protect Resistor

FUSE (

15 A)

Power Circuit Board

TB-U/V/W

Connection Terminal (U/V/W-Phase)

TB-L1/L2/L3

Connection Terminal (

TB-P1

Connection Terminal Connection Terminal

TB-P2

Connection Terminal

TB-C1

Connection Terminal

TB-N1

Current Trans

CT1,CT2

Connector

CN1

Connector

CN2

Connector

CN4

Connector

CN5

Noise Filter Circuit Board

LI1/LI2/L13/NI

Connection Terminal (

LO1/LO2/LO3/NO

Connection Terminal ( Connector

CNAC1

Connector

CNAC2

Connector

CNCT

Connector

CNDC

Fan Controller Circuit Board

U/V/W

Connection Terminal (U/V/W-Phase) Connector

CN2

Connector

CN5

Connector

CN6

LED (MF Operation Status Indicators)

LED1

Controller Circuit Board

F3, F4

FUSE (

SW1

SW4 SW5 SW6 SW7 SW8 SW9 SW10 SWP CN31

CNAC CNS CNDC 21S4 SV2 SS CN2 CN4 CN331 CN332 LEV-A 63H 63L TH3 TH4 TH7/6 TH32 CNM CNVMNT CNMNT CN3S CNDM CN51 LED1,LED2

6.3 A) Switch ( Reset, Refrigerant Address)

Switch (Test Operation) Switch (Function Switch) Switch (Model Select) Switch (Function Switch) Switch (Function Switch, Model Select) Switch (Function Switch) Switch (Model Select) Switch (Pump Down) Connector (Emergency Operation) Connector Connector Connector Connector Connector Connector (Connection for Option) Connector Connector Connector Connector Connector Connector Connector Connector Connector Connector Connector Connector ( Connector ( Connector ( Connector ( Connection for Option) Connector ( Connection for Option) Connector ( Connection for Option)

LED (Operation Inspection Indicators)

Ll /L2/L3-Power Supply)

L1/L2/L3/N-Power Supply) L1/L2/L3/N-Power Supply)

Forced Defrost, Defect History Record

A-Control Service Inspection Kit) Connect to Optional M-NET Adapter Board) Connect to Optional M-NET Adapter Board)

POWER SUPPLY 3N~ 400V 50Hz

INDOOR UNIT

NO FUSE BREAKER

1 MODEL SELECT

MODEL

RP200Y

RP250Y

M-NET ADAPTER

SYMBOL

TB7 CN5 CND CN2M SW1 SW11 SW12 LED1 LED2 LED3 LED4 LED5

C.B.

CNDC

3 1

(PNK)

CNS

(WHT)

3 2 1

TB2

S1 S2 S3

TB1

SW6

OFF

123 4 5 6

OFF

123 4 5 6

Terminal Block(M-NET connection)

Connector ( Connector ( Connector ( Switch (Status of communi Switch (Address setting:1st digit)

Switch (Address setting:2nd digit) LED ( LED ( LED ( LED ( LED (

1 2 3

CN3N

(RED)

NAME

Transmission) Power Supply)

M-NET communication)

Power Supply:DC5V) Connection to Outdoor Unit) Transmission:Sending) Transmission:Receiving) Power Supply:DC12V)

TH32 (BLK)

GND

GND2

FUSE1

N.F.

LI 1

LI 2

LI 3

GD1

1 2 3 4

TH7/6 (RED)

18V

CNAC (WHT)

1 2 3 4

FUSE2

12V

GND

1 3

cation)

TH3TH6TH7TH32 TH4

TH3

(WHT)

CNAC1

OFF

1 21 21 2

TH4

(WHT)

63H

(YLW)

1 2 3 4 5 6 7

GD2

63H 63L

CN2

(WHT)

F3 F4

SW8

1233

1 2 3

(RED)

OFF

LEV

1 2 3 4 5 6

LEV-A

CN331

(WHT)

(GRN)

1 2

63L

LED2

CN332

(BLU)

1 2

21S4

(GRN)

3 1 3 1 3 1

21S4

P.B.

1 2 3 4 5 6 7

1 21 2

CN4

(WHT)

CN5

(RED)

TB-P1

DCL

1 2

LO 1

(RED)

CNCT

LO 2

LO 3

SW10

LED1

CN2

(WHT)

1 3

CNAC2

(RED)

1 2 3 4 5 6 7 8 9

CN4

(WHT)

2 1

TB-P2

CNDC

1 3

1 2 31 2 3 4 5

CNMNTCNVMNT

(WHT) (WHT)

10 1112 1314

CNM

SV2

(BLU)

CN1(WHT)

135

TB-C1

CB1

CB2

(PNK)

(WHT)

CT2

CT1

TB-L3 TB-L2 TB-L1

TB-N1

TB-V

OFFONOFF

SW8 SW5

SW1 SW6

SWP

CN31

SW4

CN32

TB-W

TB-U

OFF

SW7SW9

SW10

CN3S

(WHT)

CNDM

CN51

(WHT)

1 2 3 4 5 1 2 3 1 2 3

V U

M-NET ADAPTER(OPTION)

SW11

SW1

CN5

(WHT)

OFF

1 21 2 3 4 5

LED2

SW12

LED3 LED4

CN2M

(WHT)

CND

(WHT)

1 2 3

LED1

LED5

TB7

ABS

M-NET

CN5

(WHT)

11 21 235

CN2

(GRN)

LED1

CN6

(BLU)

F.C.

1 2 3 1 2 3

9 WIRING SPECIFICATIONS

WIRING SPECIFICATIONS FOR 220V-240V 50Hz (INDOOR - OUTDOOR CONNECTING CABLE)

The cable shall not be lighter than design 60245 IEC or 60227 IEC. When cable length is 30m or more.

Use one cable for S1 and S2 and another for S3 as shown in the picture.

The cable length may vary depending on the condition of installation, humidity or materials, etc.

Cross section

of cable

Round

Wire size

(mm

2.5

)

Number

of wires

wire size : cable length 50m : 4mm cable length 80m : 6mm

Clockwise : S1-S2-S3

Polarity L(m) ✽5

30 ✽1

Flat

2.5

Flat

1.5

Round

2.5

✽1 : In case that cable with stripe of yellow and green is available. ✽2 : In the flat cables are connected as this picture, they can be used up to 30m.

(3C Flat cable ✕ 2)

S1 S2 S3

✽3 : In case of regular polarity connection (S1-S2-S3), wire size is 1.5mm ✽4 : In case of regular polarity connection (S1-S2-S3). ✽5 : Mentioned cable length is just a reference value.

It may be different depending on the condition of installation, humidity or materials, etc.

Be sure to connect the indoor-outdoor connecting cables directly to the units (no intermediate connections).

Not applicable (Because center wire has no cover finish)

From left to right : S1-Open-S2-S3

Clockwise : S1-S2-S3-Open Connect S1 and S3 to the opposite angle

Not

applicable

✽2

18 ✽3

30 ✽4

Intermediate connections can lead to communication errors if water enters the cables and causes insufficient insulation to ground or a poor electrical contact at the intermediate connection point. (If an intermediate connection is necessary, be sure to take measures to prevent water from entering the cables.)

If the wiring connecting the indoor and outdoor units is longer than 80m, use separate indoor / outdoor unit power supplies. (Refer to 10-2.)

Indoor unit model

Phase

Outdoor unit

Frequency & Voltage

Power supply

Max. Permissive System Impedance (") Outdoor unit input capacity *1 Main switch (Breaker)

Outdoor unit power supply Outdoor unit power supply earth Indoor unit-Outdoor unit *2 Indoor unit-Outdoor unit earth Remote controller-Indoor unit *3 Outdoor unit L1-N, L2-N, L3-N Indoor unit-Outdoor unit S1-S2 *4 Indoor unit-Outdoor unit S2-S3 *4 Remote controller-Indoor unit *4

Wiring

Wire No. O

size (mm

)

Circuit

rating

RP200, 250

3N~(3ph 4-wires), 50Hz,

380-400-415V

0.25 32A

4 o Min. 6 1 o Min. 6

Cable length 50 m : 3 o 4 (Polar) / Cable length 80 m : 3 o 6 (Polar)

1 o Min. 2.5

2 o 0.69 (Non-polar)

AC 220-230-240V AC 220-230-240V

DC24V DC12V

*1. A breaker with at least 3 mm contact separation in each pole shall be provided. Use non-fuse breaker (NF) or earth leakage breaker (NV). *2. Max. 80 m Total Max. including all indoor/ indoor connection is 80 m.

· Use one cable for S1 and S2 and another for S3 as shown in the picture. *3. A 10 m wire is attached in the remote controller accessory. *4. The voltage are NOT against the ground.

S3 terminal has DC 24 V against S2 terminal. However between S3 and S1, these terminals are not electrically insulated by the transformer or other device.

Notes: 1. Wiring size must comply with the applicable local and national code.

2. Power supply cables and Indoor unit/Outdoor unit connecting cables shall not be lighter than polychloroprene sheathed flexible cable. (Design 60245 IEC 57)

3. Use an earth wire which is longer than the other cords so that it will not become disconnected when tension is applied. The earth wire should also be thicker than the power supply cord so that it can stand any surge of electricity when trouble occurs.

. Warning:

In case of A-control wiring, there is high voltage potential on the S3 terminal caused by electrical circuit design that has no electrical insulation between power line and communication signal line. Therefore, please turn off the main power supply when servicing. And do not touch the S1, S2, S3 terminals when the power is energized. If isolator should be used between indoor unit and outdoor unit, please use 3-pole type.

A-Control

Outdoor Unit

3 poles isolator (switch)

380/ 400/ 415V 50Hz

3 phase (4 wires)

Isolator

A-Control

Indoor Unit

1 2

S1 S2 S3

Indoor/outdoor unit connection cable

Indoor unit

Unit power supply

Outdoor unit

Remote controller

B Earth leakage breaker C wiring circuit breaker or

isolating switch

B Earth leakage breaker C wiring circuit breaker or

isolating switch

1 2

Indoor unit

S2 S3

S1 S2 S3

Unit power supply

Indoor/outdoor unit connection cable

Indoor unit

Outdoor unit

Remote controller

Outdoor unit

B Earth leakage breaker C wiring circuit breaker or

isolating switch

1 2

S1 S2 S3

Indoor/outdoor connection cable

Indoor unit

Remote controller

Unit power supply

Outdoor unit

SPECIFICATIONS FOR ELECTRICAL WORK

10-1. FIELD ELECTRICAL WIRING (POWER WIRING SPECIFICATIONS)

1:1 system Synchronized twin and triple system Electrical wiring

S2 S3

• Synchronized twin

• Synchronized triple

10-2. SEPARATE INDOOR UNIT/ OUTDOOR UNIT POWER SUPPLIES

The following connection patterns are available. The outdoor unit power supply patterns vary on models.

1:1 System

* The optional indoor power supply terminal kit is required.

L N

JEB

S1 S2 S3

L N

S1 S2 S3

1 2

* Affix a label B that is included with the manuals near each wiring diagram for the indoor and outdoor units.

Simultaneous twin/triple/four system

* The optional indoor power supply terminal kits are required.

JBC

S1 S2 S3

GGHGG

S1 S2 S3

L N

S1 S2 S3

1 2

* Affix a label B that is included with the manuals near each wiring diagram for the indoor and outdoor units.

If the indoor and outdoor units have separate power supplies, refer to the table below.

If the optional indoor power supply terminal kit is used, change the indoor unit electrical box wiring refering to the figure in the right and the DIP switch settings of the outdoor unit control board.

Indoor unit specifications Indoor power supply terminal kit (option) Indoor unit electrical box connector connection change Label affixed near each wiring diagram for the indoor and outdoor units

Required Required

Required

Outdoor unit DIP switch settings (when using separate indoor unit/outdoor unit power supplies only)

ON OFF 1 2

(SW8)

Indoor unit power supplied from outdoor unit (when shipped from factory)

Electric heater (For models with heater)

L N

S1 S2 S3

Connectors (connections when shipped from the factory are for indoor unit power supplied from outdoor unit)

BLUE

YELLOW

CND

Set the SW8-3 to ON.

* There are three types of labels (labels A, B, and C). Affix the appropriate labels to

the units according to the wiring method.

A Outdoor unit power supply B Earth leakage breaker C Wiring circuit breaker or isolating switch D Outdoor unit E Indoor unit/outdoor unit connecting cords F Remote controller G Indoor unit H Option

Indoor unit power supply

Outdoor unit power supply

Earth leakage breaker

Wiring circuit breaker or isolating switch

Outdoor unit

Indoor unit/outdoor unit connecting cords

Remote controller

Indoor unit

Option

Indoor unit power supply

ORANGE CND

Indoor unit

control board

If the indoor and outdoor units have separate power supplies, change the connections of the connectors as shown in the following figure.

Electric heater (For models with heater)

S1 S2 S3

Separate indoor unit/outdoor unit power supplies

YELLOW

BLUE

YELLOW

Connectors

ORANGE

CND

Indoor unit

control board

Indoor unit model Indoor unit power supply Indoor unit input capacity Main switch (Breaker)

Indoor unit power supply Indoor unit power supply earth

)

Indoor unit-Outdoor unit

(mm

Wiring

Indoor unit-Outdoor unit earth

Wire No. o size

Remote controller-Indoor unit

Indoor unit L-N *4

Indoor unit-Outdoor unit S1-S2 *4 Indoor unit-Outdoor unit S2-S3 *4

rating

Circuit

Remote controller-Indoor unit *4

RP35~140

~/N (single), 50 Hz, 230 V

16 A

2 o Min. 1.5 1 o Min. 1.5 2 o Min. 0.3

2 o 0.3 (Non-polar)

AC 230 V

DC24 V

DC12 V *1. A breaker with at least 3 mm contact separation in each pole shall be provided. Use non-fuse breaker (NF) or earth leakage breaker (NV). *2. Max. 120 m *3.The 10 m wire is attached in the remote controller accessory. Max. 500 m *4.The figures are NOT always against the ground.

Notes: 1. Wiring size must comply with the applicable local and national code.

2. Power supply cables and indoor unit/outdoor unit connecting cables shall not be lighter than polychloroprene sheathed flexible cable (Design 60245 IEC 57)

3. Install an earth longer than other cables.

10-3. M-NET WIRING METHOD

Group remote controller

Refrigerant address 00

M-NET address 01

A-control remote controller

Refrigerant address 00

M-NET address 02

Refrigerant address 00

M-NET address 03

Power supply unit for transmission wire

Central remote controller

M-NET transmission wire

✕ Bad example (Multi spot grounding of shield wire)

Good example 1 (Single spot grounding of shield wire)

Power supply appliance

M-NET type outdoor unit

Central remote controller

Power supply appliance

M-NET type outdoor unit

M-NET transmission wire

M-NET type outdoor unit

Central remote controller

Power supply appliance

M-NET type outdoor unit

M-NET transmission wire

M-NET type outdoor unit

Good example 2 (Single spot grounding of shield wire)

(Points to notice) (1) Outside the unit, transmission wires should stay away from electric wires in order to prevent electromagnetic noise from

making an influence on the signal communication. Place them at intervals of more than 5cm. Do not put them in the same conduit tube.

(2) Terminal block (TB7) for transmission wires should never be connected to 220~240V power supply. If it is connected,

electronic parts on M-NET P.C. board may be burn out.

(3) Use 2-core x 1.25mm2shield wire (CVVS, CPEVS) for the transmission wire. Transmission signals may not be sent or

received normally if different types of transmission wires are put together in the same multi-conductor cable. Never do this because this may cause a malfunction.

It would be ok if M-NET wire (non-polar, 2-cores) is arranged in addition to the wiring for A-control.

(4) Ground only one of any appliances through M-NET transmission wire (shield wire). Communication error may occur due to

the influence of electromagnetic noise.

If there are more than two grounding spots on the shield wire, noise may enter into the shield wire because the ground

wire and shield wire form one circuit and the electric potential difference occurs due to the impedance difference among grounding spots. In case of single spot grounding, noise does not enter into the shield wire because the ground wire and shield wire do not form one circuit.

To avoid communication errors caused by noise, make sure to observe the single spot grounding method described in the

installation manual.

“Ed” error will appear on the LED display of outdoor unit. “0403” error will appear on the central-control remote controller.

M-NET Address No.

Switng setting

SW11 ones digit

SW12 tens digit

OFF

Refrigerant address

OFF

System controller

A-control remote controller

Group A Group B Group C

A-control remote controller

TB5

A-control remote controller

Refrigerant address 00

M-NET address 01

Refrigerant address 00

M-NET address 02

Refrigerant address 01

M-NET address 03

Refrigerant address 00

M-NET address 04

Power supply unit for transmission wire

A-control remote controller

TB5

Group A Group B

Refrigerant address 00

M-NET address 01

Refrigerant address 01

M-NET address 02

Refrigerant address 00

M-NET address 04

Refrigerant address 01

M-NET address 03

Refrigerant address 02

M-NET address 05

System controller

Power supply unit for transmission wire

● M-NET wiring

(1) Use 2-core x 1.25mm

shield wire for electric wires.

(Excluding the case connecting to system controller.)

(2) Connect the wire to the M-NET terminal block.Connect one core of the

transmission wire (non-polar) to Aterminal and the other to B. Peel the shield wire, twist the shield part to a string and connect it to S terminal.

(3) In the system which several outdoor units are being connected, the terminal

(A, B, S) on M-NET terminal block should be individually wired to the other

M-NET terminal block

ABS

Transmission

wire

Ground wire

Shield part

outdoor unit’s terminal, i.e. Ato A, B to B and S to S. In this case, choose one of those outdoor units and drive a screw to fix an ground wire on the plate as shown on the right figure.

10-3-1. M-NET address setting

In A-control models, M-NET address and refrigerant address should be set only for the outdoor unit. Similar to CITY MULTI system, there is no need to set the address of outdoor unit and remote controller. To construct a central control system, the setting of M-NET address should be conducted only upon the outdoor unit. The setting range should be 1 to 50 (the same as that of the indoor unit in CITY MULTI system), and the address number should be consecutively set in a same group.

Address number can be set by using rotary switches (SW11 for ones digit and SW12 for tens digit), which is located on the M-NET P.C. board of outdoor unit. (Factory setting: all addresses are set to “0”.)

10-3-2. Refrigerant address setting

In case of multiple grouping system (multiple refrigerant circuits in one group), indoor units should be connected by remote controller wiring (TB5) and the refrigerant address needs to be set. Leave the refrigerant addresses to “00” if the group setting is not conducted. Set the refrigerant address by using DIP SW1-3 to -6 on the outdoor controller circuit board. [Factory setting: all switches are OFF. (All refrigerant addresses are “00”.)]

10-3-3. Regulations in address settings

In case of multiple grouping system, M-NET and refrigerant address settings should be done as explained in the above section. Set the lowest number in the group for the outdoor unit whose refrigerant address is “00” as its M-NET address.

w Refrigerant addresses can be overlapped if they are in the different group.

w In group B, M-NET address of the outdoor unit whose refrigerant address is “00” is not set to the minimum in the group. As

“3” is right for this situation, the setting is wrong. Taking group A as a good sample, set the minimum M-NET address in the group for the outdoor unit whose refrigerant address is “00”.

11 REFRIGERANT SYSTEM DIAGRAM

Strainer

#50

Strainer

#50

Strainer

#100

Strainer

#100

Strainer

#100

Strainer

#100

Oil

separator

Strainer

#100

Stop valve

(with service port)

Stop valve

(with service port)

Charge plug

(Low pressure)

Accumulator

Oil-back hole

Strainer#40

Linear expansion valve

Low pressure switch 63L

Compressor

Capillary tube1

Capillary tube2

Replace

filter

High pressure switch 63H

Bypass valve

Charge plug (High pressure)

Thermistor TH4

(Discharge)

Thermistor TH6 (Outdoor 2-phase pipe)

Thermistor TH7

(Outdoor)

Thermistor TH3

(Outdoor pipe)

Thermistor TH32 (Outdoor pipe)

Heat exchanger

4-way valve

Refrigerant GAS pipe connection (RP200:1", RP250:1-1/8")

Refrigerant LIQUID pipe connection (RP200:3/8"F, RP250:1/2"F)

Refrigerant flow in cooling Refrigerant flow in heating

PUHZ-RP200YHA PUHZ-RP200YHA1 PUHZ-RP200YHA2 PUHZ-RP250YHA PUHZ-RP250YHA1 PUHZ-RP250YHA2

Capillary tube 1 : ø3.0 o ø1.0 o 1000mm Capillary tube 2 : ø3.0 o ø1.0 o 300mm

Refrigerant collecting (pump down)

OFF

<SW4>

A Stop C operation B Cooling D Heating

Perform the following procedures to collect the refrigerant when moving the indoor unit or the outdoor unit. 1 Before collecting the refrigerant, first make sure that the all of the SW5 DIP switches

for function changes on the control board of the outdoor unit are set to OFF. If all of the SW5 switches are not set to OFF, record the settings and then set all of the switches to OFF. Start collecting the refrigerant. After moving the unit to a new location and completing the test run, set the SW5 switches to the previously recorded settings.

Supply power (circuit breaker).

* When power is supplied, make sure that “CENTRALLY CONTROLLED” is not

displayed on the remote controller. If “CENTRALLY CONTROLLED” is displayed, the refrigerant collecting (pump down) cannot be completed normally.

After the liquid stop valve is closed, set the SWP switch on the control board of the outdoor unit to ON. The compressor (outdoor unit) and ventilators (indoor and outdoor units) start operating and refrigerant collecting operation begins. LED1 and LED2 on the control board of the outdoor unit are lit.

* Set the SWP switch (push-button type) to ON in order to perform refrigerant

collecting operation only when the unit is stopped. However, refrigerant collecting operation cannot be performed until compressor stops even if the unit is stopped. Wait 3 minutes until compressor is completely stopped and set the SWP switch to ON again.

Unit replacement operation

· This model will automatically begin the replacement operation after it has been installed when it enters the initialization phase for normal heating or cooling. Ho wever , the unit will not automatically perf orm the replacement operation if it is moved to a new location where it will be used with existing R22 refrigerant piping. Under such conditions, always use the SW8-2 operations to perform the replacement operation before beginning the test operation.

Some models can perform the replacement operation only by SW8-2 operation. Refer to the outdoor unit's Installation Manual for detail.

Replacement operation procedures (When moving the unit and connecting it to existing R22 piping.)

1 Supply power. 2

Set DIP switch SW8-2 on the control board of the outdoor unit to ON to start replacement operation. * The replacement operation is performed using the cooling system. Cool air will

flow from the indoor unit during the replacement operation.

* During the replacement operation,

and LED1 and LED2 on the control board of the outdoor unit flash together.

The duration of the replacement operation is determined by the length of the pip-

ing. Alwa ys perform the replacement operation f or longer than the stipulated time. * Always perform one of the following operations at the completion of the re-

placement operation. The replacement operation will end and the unit will automatically stop.

TEST RUN

is displayed on the remote controller

4 As the unit automatically stops after two or three minutes of refrigerant

collecting operation (LED1 if not lit and LED2 is lit), be sure to quickly close the gas stop valve. If the unit stops while both LED1 and LED2 are lit, open the liquid valve completely, wait three minutes, then repeat the step 3.

* If the refrigerant collecting operation has been completed normally

(LED1 and LED2 are lit), the unit will remain stopped until the power supply is turned off.

5 Turn off the power supply (circuit breaker).

* Note that when the length of the extension piping is long, it may not be

possible to perform a pump-down operation.When performing the pumpdown operation, make sure that the low pressure is lowered to near 0 MPa (gauge).

(1)Set SW8-2 from ON to OFF. (When ending a replacement operation of less

than 2 hours.)

· Each time SW8-2 is set from OFF to ON, the replacement operation can be started. Always perf orm the replacement operation for longer than the stipulated time. Required replacement operation times

Piping Length

0 to 20 meters 30 minutes or more 21 to 30 meters 45 minutes or more 31 to 70 meters 60 minutes or more

(2)The replacement operation will automatically stop after 2 hours. (It will end with

SW8-2 still in the ON position.)

· When the replacement operation has ended automatically after 2 hours of operation, there is no need to set SW8-2 from ON to OFF; normal air conditioning operations can be started with the SW8-2 being set to ON. However, to repeat the replacement operation, SW8-2 will have to be returned to OFF and then set to ON.

* If the indoor temperature is below 15:, the compressor will operate

intermittently but the unit is not faulty.

Replacement

Operation Time

Start and finish of test run

• Operation from the indoor unit

Execute the test run using the installation manual for the indoor unit.

• Operation from the outdoor unit By using the DIP switch SW4 on the control board of the outdoor unit, test run can be started and finished, and its operation mode (cooling/heating) can be set up.

1Set the operation mode (cooling/heating) using SW4-2. 2Turn on SW4-1 to start test run with the operation mode set by SW4-2. 3Turn off SW4-1 to finish the test run.

• There may be a faint knocking sound around the machine room after power is supplied, but this is no problem with product because the linear expansion pipe is just moving to adjust opening pulse.

• There may be a knocking sound around the machine room for several seconds after compressor starts operating, but this is no problem with product because the check valve, itself, generates the sound because pressure difference is small in the refrigerant circuit.

Note: The operation mode cannot be changed by SW4-2 during test run. (To change test run mode, stop the unit by SW4-1, change the operation mode and restart the test run by SW4-1.)

12 TROUBLESHOOTING

Unit conditions at service

Error code

Actions to be taken for service (summary)

The inferior phenomenon is reoccurring.

Displayed

Not displayed

Judge what is wrong and take a corrective action according to “12-4. Self-diagnosis action table”.

Conduct trouble shooting and ascertain the cause of the inferior phenomenon according to “12-5. Troubleshooting by inferior phenomena”.

The inferior phenomenon is not reoccurring.

Logged

Not logged

1Consider the temporary defects such as the work of protection devices in the refrigerant circuit including compressor, poor connection of wiring, noise and etc. Re-check the symptom, and check the installation environment, refrigerant amount, weather when the inferior phenomenon occurred, matters related to wiring and etc. 2Reset error code logs and restart the unit after finishing service. 3There is no abnormality concerning of parts such as electrical component, controller board, remote controller and etc.

1Re-check the abnormal symptom. 2Conduct trouble shooting and ascertain the cause of the

inferior phenomenon according to “12-5. Troubleshooting by inferior phenomena”. 3Continue to operate unit for the time being if the cause is not ascertained. 4There is no abnormality concerning of parts such as electrical component, controller board, remote controller and etc.

12-1. TROUBLESHOOTING

Present and past error codes are logged and displayed on the wired remote controller and control board of outdoor unit. Actions to be taken for service, which depends on whether or not the inferior phenomenon is reoccurring at service, are summarized in the table below. Check the contents below before investigating details.

12-2. CHECK POINT UNDER TEST RUN

(1) Before test run

• After installation of indoor and outdoor units, piping work and electric wiring work, re-check that there is no refrigerant leak-

age, loosened connections and incorrect polarity.

• Measure impedance between the ground and the power supply terminal block(L, N) on the outdoor unit by 500V Megger and check that it is 1.0M" or over.

wDon’t use 500V Megger to indoor/outdoor connecting wire terminal block(S1, S2, S3) and remote controller terminal block

(1, 2). This may cause malfunction.

• Make sure that test run switch (SW4) is set to OFF before turning on power supply.

• Turn on power supply 12 hours before test run in order to protect compressor.

• For specific models which requires higher ceiling settings or auto-recovery feature from power failure, make proper changes

of settings referring to the description of “Selection of Functions through Remote Controller”.

Make sure to read operation manual before test run. (Especially items to secure safety.)

"TEST RUN" and the currently selected

LCD

Contents of inferior phenomena

P1 P2 P4 P5 P6 P8 P9 Fb

Abnormality of room temperature thermistor Abnormality of pipe temperature thermistor/ Liquid Abnormality of drain sensor/ Float switch connector open Drain overflow protection is working. Freezing/ overheating protection is working. Abnormality of pipe temperature Abnormality of pipe temperature thermistor/ Cond./Eva Abnormality of indoor controller board

LCD

Contents of inferior phenomena

U1~UP

F3~F9 E0~E5 E6~EF

----

FFFF

Malfunction outdoor unit Malfunction

outdoor unit Remote controller transmitting error Indoor/outdoor unit communication error

No error history No applied unit

LED1

(microcomputer power supply)

LED2

(remote controller)

LED3

(indoor/outdoor communication)

Lits when power is supplied. Lits when power is supplied for wired remote controller. The indoor unit should be connected to the outdoor unit with address “0” setting.

Flash when indoor and outdoor unit are communicating.

operation mode are displayed altemately.

Displays the remaining test run time.

[TEST] button

Pipe (liquid) temperature

Operating procedures

1. Turn on the main power supply.

2. Press TEST button twice.

3. Press OPERATION SWITCH button.

4. Press AIR DIRECTION button.

5. Check the outdoor unit fan for correct running.

6. Press the ON/OFF button to reset the test run in progress.

7. Register the contact number.

While the room temperature display on the remote controller is “PLEASE WAIT”, the remote controller is disabled. Wait until “PLEASE WAIT” disappears before using remote controller. “PLEASE WAIT” appears for about 2 minutes after power supply is turned on. w1

The TEST RUN appears on the screen. Cooling mode:

Heating mode: Check if warm air blows. (It takes a little while until warm air blows.)

Check for correct motion of auto-vanes. The outdoor unit features automatic capacity control to

provide optimum fan speeds. Therefore, the fan keeps running at a low speed to meet the current outside air condition unless it exceeds its available maximum power. Then, in actuality, the fan may stop or run in the reverse direction depending on the outside air, but this does not mean malfunction.

Check if cool air blows and water is drained.

• In case of test run, the OFF timer will be activated, and the test run will automatically stop after 2 hours.

• The room temperature display section shows the pipe temperature of indoor units during the test run.

• Check that all the indoor units are running properly in case of simultaneous twin and triple operation. Malfunctions may not be displayed regardless of incorrect wiring.

w1 After turning on the power supply, the system will go into startup mode, “PLEASE WAIT” will blink on the display section of

the room temperature, and lamp(green) of the remote controller will flash. As to INDOOR BOARD LED, LED1 will be lit up, LED2 will either be lit up in case the address is 0 or turned off in case the address is not 0. LED3 will blink. As to OUTDOOR BOARD LED, LED1(green) and LED2(red) will light up. (After the startup mode of the system finishes, LED2(red) will be turned off.) In case OUTDOOR BOARD LED is digital display, — and — will be displayed alternately every second.

• If one of the above operations doesn’t function correctly, the causes written below should be considered. Find causes from the symptoms. The below symptoms are under test run mode. “startup” in the table means the display status of w1 written above.

Symptoms in test run mode

Remote Controller Display

Remote controller displays “PLEASE WAIT”, and

After power is turned on, “PLEASE WAIT” is displayed for 3 minutes, then error code is displayed.

No display appears even when remote controller operation switch is turned on. (Operation lamp does not light up.)

Display appears but soon disappears even when remote controller is operated.

cannot be operated.

OUTDOOR BOARD LED Display

< > indicates digital display.

After “startup” is displayed, only green lights up. <00> After “startup” is displayed, green(once) and red(once) blink alternately. <F1>

After “startup” is displayed, green(once) and red(twice) blink alternately. <F3, F5, F9>

After “startup” is displayed, green(twice) and red(once) blink

alternately. <EA. Eb> After “startup” is displayed, only

green lights up. <00> After “startup” is displayed, only

green lights up. <00>

• After power is turned on, “PLEASE WAIT” is displayed for 2 minutes during

• Incorrect connection of outdoor terminal block (L S1, S2, S3.)

• Outdoor unit’s protection installation connector is open.

• Incorrect wiring between the indoor and outdoor unit (Polarity is wrong for S1, S2, S3.)

• Remote controller transmission wire short.

• There is no outdoor unit of address 0. (Address is other than 0.)

• Remote controller transmission wire open.

• After canceling function selection, operation is not possible for about 30 seconds. (Normal)

system startup. (Normal)

Cause

1, L2, L3 and

w Press the remote controller’s CHECK button twice to perform self-diagnosis. See the table below for the contents of LCD

display.

See the table below for details of the LED display (LED 1, 2, 3) on the indoor controller board.

MODE

COOL

HEAT

TEST RUN

FAN

VANE

TEST RUN

3,4

ON/OFF

MODE

CHECK

TEST RUN

SET

TEST RUN

FAN

VANE

LOUVER

RESET

CLOCK

TEMP

AUTO STOP

AUTO START

min

Test run [for wireless remote controller]

Measure an impedance between the power supply terminal block on the outdoor unit and ground with a 500V Megger and check that it is equal to or greater than 1.0M".

1 Turn on the main power to the unit. 2 Press the button twice continuously.

(Start this operation from the status of remote controller display turned off.) A and current operation mode are displayed.

3 Press the ( ) button to activate mode, then

check whether cool air is blown out from the unit.

4 Press the ( ) button to activate mode, then

check whether warm air is blown out from the unit.

5 Press the button and check whether strong air is blown out

from the unit.

6 Press the button and check whether the auto vane operates

properly.

7 Press the ON/OFF button to stop the test run.

Note:

• Point the remote controller towards the indoor unit receiver while following steps

• It is not possible to run in FAN, DRY or AUTO mode.

to 77.

12-3. HOW TO PROCEED "SELF-DIAGNOSIS"

12-3-1. When a Problem Occurs During Operation

If a problem occurs in the air conditioner, the indoor and outdoor units will stop, and the problem is shown in the remote controller display.

[CHECK] and the refrigerant address are displayed on the temperature display, and the error code and unit number are displayed alternately as shown below.

1 (If the outdoor unit is malfunctioning, the unit number will be "00".) 2 In the case of group control, for which one remote controller controls

multiple refrigerant systems, the refrigerant address and error code of the unit that first experienced trouble (i.e., the unit that transmitted the error code) will be displayed.

3 To clear the error code, press the

ON/OFF

button.

Error code (2 or 4 digits)

(Alternating Display)

Address (3 digits) or unit number (2 digits)

When using remote-/local-controller combined operation, cancel the error code after turning off remote operation. During central control by a MELANS controller, cancel the error code by pressing the

ON/OFF

button.

12-3-2. Self-Diagnosis During Maintenance or Service

Since each unit has a function that stores error codes, the latest check code can be recalled even if it is cancelled by the remote controller or power is shut off.

Check the error code history for each unit using the remote controller.

Switch to self-diagnosis mode.

Press the will change as shown below.

CHECK

button twice within 3 seconds. The display content

Unit number or refrigerant address to be diagnosed

Set the unit number or refrigerant address you want to diagnose.

Press the [TEMP] buttons ( and ) to select the desired number or address. The number (address) changes between[01] and [50] or [00]

and

[15].

The refrigerant address will begin to blink approximately 3 seconds after being selected and the self-diagnosis process will begin.

Display self-diagnosis results. <When there is error code history> (For the definition of each error code, refer to 12-4.)

Error code (2 or 4 digits)

Reset the error history. Display the error history in the diagnosis result display screen (see step

(Alternating Display)

Address (3 digits) or unit number (2 digits)

D Press the

address or refrigerant address will flash.

5 Cancel self-diagnosis.

Self-diagnosis can be cancelled by the following 2 methods.

H Press the

5 Press the

ON/OFF

CHECK

ON/OFF

button twice within 3 seconds. The self-diagnosis

button twice within 3 seconds. ➔ Self-diagnosis will be cancelled and the screen will return to the previous state in effect before the start

button. ➔ Self-diagnosis will be cancelled and the indoor unit will stop.

of self-diagnosis.

When the error history is reset, the display will look like the one shown below. However, if you fail to reset the error history, the error content will be displayed again.

12-3-3. Remote Controller Diagnosis

If the air conditioner cannot be operated from the remote controller, diagnose the remote controller as explained below.

1 First, check that the power-on indicator is lit.

If the correct voltage (DC12 V) is not supplied to the remote controller, the indicator will not light. If this occurs, check the remote controller's wiring and the indoor unit.

Power on indicator

2 Switch to the remote controller self-diagnosis mode.

H Press the

change as shown below.

CHECK

button for 5 seconds or more. The display content will

A Press the

button to start self-diagnosis.

FILTER

3 Remote controller self-diagnosis result

[When the remote controller is functioning correctly]

Check for other possible causes, as there is no problem with the remote controller.

[Where the remote controller is not defective, but cannot be operated.] (Error display 2) [E3], [6833] or [6832] flashes.

There might be noise or interference on the transmission path, or the indoor unit or other remote controllers are defective. Check the transmission path and other controllers.

➝ Transmission is not possible.

[When the remote controller malfunctions] (Error display 1) "NG" blinks. ➝ The remote controller's transmitting-receiv-

The remote controller must be replaced with a new one.

(Error display 3)

The number of data errors is the difference between the number of bits sent from the remote controller and the number actually transmitted through the transmission path. If such a problem is occurring, the transmitted data is affected by noise, etc. Check the transmission path.

ing circuit is defective.

"ERC" and the number of data errors are displayed. ➝ Data error has occurred.

When the number of data errors is "02": Transmission data from remote controller Transmission data on transmission path

4 To cancel remote controller diagnosis

H Press the

approximately 30 seconds, the state in effect before the diagnosis will be restored.

CHECK

button for 5 seconds or more. Remote controller diagnosis will be cancelled, "PLEASE WAIT" and operation lamp will blink. After

12-3-4. Malfunction-diagnosis method by wireless remote controller

ON/OFF

TEMP

FAN

VANE

MODE

CHECK

LOUVER

TEST RUN

AUTO STOP

AUTO START

min

RESET

SET

CLOCK

CHECK

CHECK display

Temperature button

CHECK button

Refrigerant address display

HOUR button

ON/OFF button

When a malfunction occurs to air conditioner, both indoor unit and outdoor unit will stop and operation lamp blinks to inform unusual stop.

<Malfunction-diagnosis method at maintenance service>

[Procedure]

1. Press the CHECK button twice.

• "CHECK" lights, and refrigerant address "00" flashes.

• Check that the remote controller's display has stopped before continuing.

2. Press the temperature buttons.

3. Point the remote controller at the

sensor on the indoor unit and press the HOUR button.

4. Point the remote controller at the

sensor on the indoor unit and press the ON/OFF button.

• Select the refrigerant address of the indoor unit for the self-diagnosis.

Note: Set refrigerant address using the

outdoor unit’s DIP switch (SW1).

(For more information, see the outdoor unit installation manual.)

• If an air conditioner error occurs, the indoor unit's sensor emits an intermittent buzzer sound, the operation light flashes, and the error code is output. (It takes 3 seconds at most for error code to appear.)

• The check mode is cancelled.

• Refer to the following tables for details on the check codes. [Output pattern A]

Beeper sounds OPERATION

INDICATOR lamp flash pattern

Beep

Self-check starts (Start signal received)

Beep Beep Beep Beep Beep Beep

1st2nd3

Off

Approx. 2.5 sec.On0.5 sec.On0.5 sec.On0.5 sec.

Number of flashes/beeps in pattern indicates the check code in the following table (i.e., n=5 for “P5”)

0.5 sec.

[Output pattern B]

Beeper sounds OPERATION

INDICATOR lamp flash pattern

Beep Beep Beep Beep Beep

1st2nd3

Off

Self-check starts (Start signal received)

Approx. 2.5 sec.OnApprox. 3 sec.On0.5 sec.On0.5 sec.On0.5 sec.

Number of flashes/beeps in pattern indicates the check code in the following table (i.e., n=5 for “U2”)

[Output pattern A] Errors detected by indoor unit

Wireless remote controller

Wired remote controller

Beeper sounds/OPERATION

INDICATOR lamp flashes Check code

(Number of times)

1P1 2

P2 Pipe (TH2) sensor error P9 Pipe (TH5) sensor error

3 E6,E7

Intake sensor error

Indoor/ outdoor unit communication error 4 P4 Drain sensor error/ Float switch connector open 5 P5 Drain pump error 6 P6 Freezing/ Overheating protection operation 7 EE Communication error between indoor and outdoor units 8 P8 Pipe temperature error 9 E4, E5 Remote controller signal receiving error

10 11

– –

12 Fb Indoor unit control system error (memory error, etc.)

–

E0, E3

Remote controller transmission error – E1, E2 Remote controller control board error

1st2

Off

Approx. 2.5 sec.On0.5 sec.On0.5 sec.

Number of flashes/beeps in pattern indicates the check code in the following table

0.5 sec.

Off

Approx. 2.5 sec.OnApprox. 3 sec.On0.5 sec.On0.5 sec.

Symptom Remark

· · · Repeated

Beep Beep

1st2

Number of flashes/beeps in pattern indicates the check code in the following table

· · · Repeated

As for indoor unit, refer to indoor unit's service manual.

[Output pattern B]

Wireless remote controller

Beeper sounds/OPERATION

INDICATOR lamp flashes Check code

Errors detected by unit other than indoor unit (outdoor unit, etc.)

Wired remote controller

Symptom Remark

(Number of times)

1 2

3 4

6 7

8 9

10 11 12

13 14

UP U3,U4 UF

U1,Ud U5

U8 U6 U7

U9,UH

– –

Others

*1If the beeper does not sound again after the initial

the OPERATION INDICATOR lamp does not come on,

Indoor/outdoor unit communication error (Transmitting error) (Outdoor unit)

Compressor overcurrent interruption Open/short of outdoor unit thermistors Compressor overcurrent interruption (When compressor locked) Abnormal high discharging temperature/ 49C worked/

insufficient refrigerant Abnormal high pressure (63H worked)/ Overheating

protection operation

Abnormal temperature of heat sink

Outdoor unit fan protection stop

Compressor overcurrent interruption/Abnormal of power module Abnormality of super heat due to low discharge temperature Abnormality such as overvoltage or voltage shortage and

abnormal synchronous signal to main circuit/Current sensor error

– –

Other errors

2 beeps to confirm the self-check start signal was received and

there are no error records.

For details, check the LED display of the outdoor controller board.

*2If the beeper sounds 3 times continuously “beep, beep, beep (0.4 + 0.4 + 0.4 sec.)” after the initial two beeps to confirm

the self-check start signal was received, the specified refrigerant address is incorrect.

12-4. SELF-DIAGNOSIS ACTION TABLE

Error Code

Meaning of error code and detection method

1 No voltage is supplied to terminal

block(TB1) of outdoor unit.

a) Power supply breaker is b) Contact failure or discon-

c) Open phase (L2 or N phase)

2 Electric power is not supplied to

outdoor controller circuit board.

a) Disconnection of connector

(Note 1) Refer to indoor unit section for code P and code E.

Case

turned off. nection of power supply

terminal

(CNDC)

1 Check following items.

a) Power supply breaker b) Connection of power supply terminal block.

c) Connection of power supply terminal block.

2 Check connection of the connector (CNDC)

on the outdoor controller circuit board. Check connection of the connector, (CNDC) the outdoor noise filter circuit board.

Refer to 12-9.

Judgment and action

(TB1) (TB1)

None —

63L connector open

Abnormal if 63L connector circuit is open for 3 minutes continuously after power supply.

(5202)

(5201)

(4119)

63L: Low-pressure switch

63H connector open

Abnormal if 63H connector circuit is open for 3 minutes continuously after power supply. 63H: High-pressure switch

2 connector open

Abnormal if both 63H and 63L connector circuits are open for 3 minutes continuously after power supply.

63H: High-pressure switch 63L: Low-pressure switch

3 Disconnection of outdoor noise

filter circuit board or parts failure in outdoor noise filter circuit board

4 Defective outdoor controller

circuit board

1 Disconnection or contact failure

of 63L connector on outdoor controller circuit board

2 Disconnection or contact failure

of 63L

3 63L is working due to refriger-

ant leakage or defective parts.

4 Defective outdoor controller

circuit board

1 Disconnection or contact failure

of 63H connector on outdoor controller circuit board

2 Disconnection or contact failure

of 63H

3 63H is working due to defective

parts.

4 Defective outdoor controller

circuit board

1 Disconnection or contact failure

of connector (63H,63L) on outdoor controller circuit board

2 Disconnection or contact failure

of 63H, 63L

3 63H and 63L are working due

to defective parts.

4 Defective outdoor controller

circuit board

3 a) Check connection of outdoor noise filter

circuit board.

b) Replace outdoor noise filter circuit board.

Refer to 12-9.

4 Replace controller board (When items above

are checked but the units cannot be repaired.)

1 Check connection of 63L connector on

outdoor controller circuit board. Refer to 12-9.

2 Check the 63L side of connecting wire. 3 Check refrigerant pressure.

Charge additional refrigerant. Check continuity by tester. Replace the parts if the parts are defective.

4 Replace outdoor controller circuit board. 1 Check connection of 63H connector on

outdoor controller circuit board. Refer to 12-9.

2 Check the 63H side of connecting wire. 3 Check continuity by tester.

Replace the parts if the parts are defective.

4 Replace outdoor controller circuit board.

1 Check connection of connector(63H,63L) on

outdoor controller circuit board. Refer to 12-9.

2 Check the 63H and 63L side of connecting

wire.

3 Check continuity by tester.

Replace the parts if the parts are defective.

4 Replace outdoor controller circuit board.

Error Code

(6844)

(6845)

(6846)

Meaning of error code and detection method Indoor/outdoor unit connector

mis-wiring, excessive number of units (5 units or more)

1. Outdoor controller circuit board can automatically check the number of connected indoor units. Abnormal if the number cannot be checked automatically due to mis-wiring of indoor/outdoor unit connecting wire and etc. after power is turned on for 4 minutes.

2. Abnormal if outdoor controller circuit board recognizes the number of connected indoor units as “5 units or more”.

Mis-wiring of indoor/outdoor unit connecting wire (converse wiring or disconnection)

Outdoor controller circuit board can automatically set the unit number of indoor units. Abnormal if the indoor unit number can not be set within 4 minutes after power on because of mis-wiring (converse wiring or disconnection) of indoor/outdoor unit connecting wire.

Start-up time over

The unit can not finish start-up process within 4 minutes after power on.

1 Contact failure or miswiring of

2 Diameter or length of

3 5 or more indoor units are 4 Defective transmitting receiving

5 Defective transmitting receiving

6 Defective indoor power circuit 7 2 or more outdoor units have

8 Noise has entered into power

1 Contact failure or miswiring of

2 Diameter or length of

4 Defective transmitting receiving

5 Defective transmitting receiving

6 Defective indoor power circuit 7 2 or more outdoor units have

8 Noise has entered into power

1 Contact failure of indoor/ 2 Diameter or length of indoor/

7 2 or more outdoor units have

8 Noise has entered into power

Case

indoor/outdoor unit connecting wire

indoor/outdoor unit connecting wire is out of specified capacity.

connected to one outdoor unit. circuit of outdoor controller

circuit board circuit of indoor controller cir-

cuit board board refrigerant address “0”.

(In case of group control)

supply or indoor / outdoor unit connecting wire.

indoor/outdoor unit connecting wire

indoor/outdoor unit connecting wire is out of specified capacity.

circuit of outdoor controller circuit board

circuit of indoor controller circuit board

board refrigerant address “0” .

(In case of group control)

supply or indoor/outdoor unit connecting wire.

outdoor unit connecting wire outdoor unit connecting wire is

out of specified capacity. refrigerant address “0” .

(In case of group control) supply or indoor/outdoor unit

connecting wire.

Judgment and action

1 Check disconnection or looseness or polarity

of indoor/outdoor unit connecting wire of indoor and outdoor units.

2 Check diameter and length of indoor/outdoor

unit connecting wire. Total wiring length: 80m (including wiring connecting each indoor unit and between indoor and outdoor unit) Also check if the connection order of flat cable is S1, S2, S3.

3 Check the number of indoor units that are

connected to one outdoor unit. (If EA is detected)

4~6 Turn the power off once, and on again to

check. Replace outdoor controller circuit board, indoor controller circuit board or indoor power board if abnormality occurs again.

7 Check if refrigerant addresses (SW1-3 to

SW1-6 on outdoor controller circuit board) are overlapping in case of group control system.

8 Check transmission path, and remove the

cause.

w The descriptions above, 1-8, are for EA, Eb

and EC.

Error Code

(1302)

Meaning of error code and detection method

Abnormal high pressure (High-pressure switch 63H worked)

Abnormal if high-pressure switch 63H worked ( 3.6MPa ) during compressor operation.

63H: High-pressure switch

Case

1 Short cycle of indoor unit 2 Clogged filter of indoor unit 3 Decreased airflow caused by

dirt of indoor fan

4 Dirt of indoor heat exchanger 5 Locked indoor fan motor 6 Malfunction of indoor fan motor 7 Defective operation of stop

valve (Not full open)

8 Clogged or broken pipe 9 Locked outdoor fan motor

0 Malfunction of outdoor fan

motor

1 Short cycle of outdoor unit 2 Dirt of outdoor heat exchanger 3 Decreased airflow caused by

defective inspection of outside temperature thermistor (It detects lower temperature than actual temperature.)

4 Disconnection or contact failure

of connector (63H) on outdoor controller circuit board

5 Disconnection or contact failure

of 63H connection

6 Defective outdoor controller cir-

cuit board

7 Defective action of linear

expansion valve

8 Malfunction of fan driving

circuit

Judgment and action

1~6Check indoor unit and repair defectives.

7 Check if stop valve is full open. 8 Check piping and repair defectives.

9~2 Check outdoor unit and repair defectives.

3 Check the inspected temperature of outside

temperature thermistor on LED display. (SW2 on A-Control Service Tool : Refer to 12-10.)

4~6Turn the power supply off and check F5 is

displayed when the power supply is turned again. When F5 is displayed, refer to “Judgment and action” for F5.

7 Check linear expansion valve.

Refer to 12-6.

8 Replace outdoor controller circuit board or

FAN controller circuit board.

(1102)

Abnormal high discharging temperature

(1) Abnormal if discharge temperature

thermistor (TH4) exceeds 125: or 110: continuously for 5 minutes. Abnormal if condenser/evaporator temperature thermistor (TH5) exceeds 40: during defrosting and discharge temperature thermistor (TH4) exceeds 110:.

(2) Abnormal if discharge super heat

(Cooling: TH4 – TH5 / Heating: TH4 –

TH6) increases. All the conditions in Aor B are detected simultaneously for 10 minutes continuously after 6 minutes past from compressor start-up (including the thermostat indication or recovery from defrosting).

• Heating mode

• When discharge super heat is less than 70 deg.

• When the TH6 temp is more than the value obtained by TH7 – 5 deg.

• When the condensing temp of TH5 is less than 35:.

• During comp operation (Cooling and

Heating)

• When discharge super heat is less

than 80 deg in Cooling.

• When discharge super heat is less

than 90 deg in Heating.

• When condensing temp of TH6 is

more than –40:. (In Cooling only.)

1 Over-heated compressor oper-

ation caused by shortage of refrigerant

2 Defective operation of stop

valve

3 Defective thermistor 4 Defective outdoor controller cir-

cuit board

5 Defective action of linear

expansion valvep

1 Check intake super heat.

Check leakage of refrigerant. Charge additional refrigerant.

2 Check if stop valve is full open. 34 Turn the power supply off and check if U3

is displayed when the power supply is turned again. When U3 is displayed, refer to “Judgement and action” for U3.

5 Check linear expansion valve.

Refer to 12-6.

+ 80 hidden pages

Mitsubishi OC338C Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual