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Mitsubishi Electric MUZ-GA50VA, Service Manual

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Mitsubishi Electric MUZ-GA50VA Service Manual Download Page 51

51

MUZ-GA50VA

MUZ-GA60VA

MUZ-GA71VA

13-1. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS  AND 

FUNCTIONAL PARTS

Symbol

in Wiring

Diagram

Q'ty/unit

Remarks

Part No.

No.

Part Name

MUZ-GA50
 VA  -

E1

MUZ-GA60
 VA  -

E1

MUZ-GA71
 VA  -

E1

E02 819 297
E02 851 630
E02 853 630
E02 938 301
E02 851 501
E02 851 290
E02 853 290
E02 819 232
E02 819 009
E02 819 521
E02 853 646
E12 C34 506
E02 853 506
E02 939 900
E02 853 900
E02 851 661
E02 819 661
E02 821 662
E02 822 662
E02 851 640
E02 853 640
E02 851 493
E02 853 299
E02 935 490
E02 891 961
E02 819 650
E02 819 245
E12 D01 450
E12 C96 450
E12 C97 450
E02 935 374
E02 823 375
E02 851 337
E02 935 444
E02 935 309
E02 851 308
E02 935 440
E02 819 233
E02 817 009
E02 851 515
E02 127 382 
E02 737 382
E02 935 385
E02 851 936
E02 853 936
E02 861 936

1

2

3
4

5

6
7
8
9

10

11

12

13

14

15
16
17
18
19
20

21

22
23
24
25
26
27
28
29
30
31
32
33
34

35

TOP PANEL
OUTDOOR HEAT EXCHANGER
OUTDOOR HEAT EXCHANGER
OUTDOOR FAN MOTOR
PROPELLER 
BASE
BASE
CABINET
HANDLE
FAN GUARD
HIGH PRESSURE SWITCH
COMPRESSOR RUBBER SET
COMPRESSOR RUBBER SET
COMPRESSOR 
COMPRESSOR
STOP VALVE(GAS)
STOP VALVE(GAS)
STOP VALVE(LIQUID)
STOP VALVE(LIQUID)
EXPANSION VALVE
EXPANSION VALVE
EXPANSION VALVE COIL
OIL SEPARATOR
R.V. COIL
4-WAY VALVE
VALVE COVER
SERVICE PANEL
OUTDOOR ELECTRONIC CONTROL P.C. BOARD
OUTDOOR ELECTRONIC CONTROL P.C. BOARD
OUTDOOR ELECTRONIC CONTROL P.C. BOARD
TERMINAL BLOCK
TERMINAL BLOCK
REACTOR
NOISE FILTER P.C. BOARD
AMBIENT TEMPERATURE THERMISTOR
THERMISTOR SET
POWER  BOARD
BACK PANEL(OUT)
HANDLE
MOTOR SUPPORT
FUSE
FUSE
FUSE & VARISTOR
CAPILLARY TUBE(TAPER PIPE)
CAPILLARY TUBE(TAPER PIPE)
CAPILLARY TUBE

RC0J60-

3RUBBERS/SET
3RUBBERS/SET
SNB130FLDH1
TNB220FMCH

{

12.7

{

15.88

{

6.35

{

9.52

3P
3P

Including heat sink and RT64

T3.15AL250V
T1AL250V
T2AL250V

{

3.6x

{

2.4x50

{

3.6x

{

2.4x50

{

1.8x

{

0.6x1000

MF

HPS

MC
MC

LEV

21S4

TB1
TB2

L

RT65

RT61,RT62,RT68

F801
F911

F64,NR64

1
1

1
1
1

1
1
1

3

1

1
1

1

1

1
1
1
1

1

1
1
1
1
1
1
1
1
1
1
1
1
1
1

1
1

1
1
1

1
1
1

3

1

1

1

1

1

1
1
1
1
1

1
1
1
1
1
1
1
1
1
1
1
1
1
1

1

1
1
1

1
1
1
1
1

3

1

1

1

1
1
1
1
1
1
1

1
1
1
1
1
1
1
1
1
1
1
1
1
1

1
1

DEFROST, DISCHARGE
OUTDOOR HEAT EXCHANGER

Part numbers that are circled are not shown in the illustration.

PARTS LIST (non-RoHS compliant)

OB389F--2qxp  07.9.3 5:09 PM  Page 51

Summary of Contents for MUZ-GA50VA

Page 1: ...50 14 RoHS PARTS LIST 54 Wireless type Models SPLIT TYPE HEAT PUMP AIR CONDITIONERS MUZ GA50VA MUZ GA60VA MUZ GA60VA MUZ GA60VA MUZ GA71VA MUZ GA71VA E2 E1 E3 E2 E1 E1 HFC utilized R410A NOTE RoHS compliant products have G mark on the spec name plate For servicing of RoHS compliant products refer to the RoHS Parts List Contents of SERVICE FUNCTIONS 10 have been removed No OB389 REVISED EDITION F I...

Page 2: ...mber E02 851 900 E02 939 900 RoHS PARTS LIST number E12 851 900 E12 939 900 2 Revision C MUZ GA60 71VA have been added Check of outdoor thermistors 11 6 F has been corrected Contents of SERVICE FUNCTIONS 10 have been removed as these models do not have the functions E2 Revision D PARTS LIST and RoHS PARTS LIST have been changed Revision E REFRIGERANT SYSTEM DIAGRAM has been changed for MUZ GA60VA ...

Page 3: ... of R22 some special tools and piping parts materials are required Refer to the table below 2 Take sufficient care not to allow water and other contaminations to enter the R410A refrigerant during storage and installation since it is more susceptible to contaminations than R22 3 For refrigerant piping use clean pressure proof parts materials specifically designed for R410A Refer to 2 Refrigerant p...

Page 4: ...rque wrench Flare tool Flare gauge Vacuum pump adapter Electronic scale for refrigerant charging No Not Substitutable for R410A Yes Substitutable for R410A No 12 7 mm and 15 88mm 1 Tools dedicated for the air conditioner with R410A refrigerant The following tools are required for R410A refrigerant Some R22 tools can be substituted for R410A tools The diameter of the service port on the stop valve ...

Page 5: ... the vacuum pump for air purging for the purpose of environmental protection 5 Additional charge For additional charging charge the refrigerant from liquid phase of the gas cylinder If the refrigerant is charged from the gas phase composition change may occur in the refrigerant inside the cylinder and the outdoor unit In this case capacity of the refrigeration cycle decreases or normal operation c...

Page 6: ...on oil Model kW r h K h A A W A A A W mm kg dB rpm kg Compressor Fan motor Special remarks Coefficient of performance C O P 1 Capacity Electrical data Single phase 230V 50Hz 20 11 2 0 30 TNB220FMCH 1 300 U V 1 41 W U 1 41 V W 1 41 RC0J60 AA BLK WHT 15 2 WHT RED 15 2 RED BLK15 2 840o850o330 58 2 2 0 NEO22 Cooling 7 1 0 9 8 3 3 8 2 940 1 650 10 4 2 360 98 7 10 1 2 93 53 51 800 480 Heating 8 1 0 9 9 ...

Page 7: ...mperature 6 Model Item Smoothing capacitor Current transformer Current transformer Fuse Fuse Fuse Intelligent power module High pressure switch Intelligent power module Reactor Expansion valve coil Power factor controller Resistor Resistor Resistor Solenoid coil relay Terminal block Terminal block Relay R V coil MUZ GA50VA CB1 2 3 CT1 2 CT61 F64 F801 F911 HC930 HPS IPM L LEV PFC R64A B R937A B RS1...

Page 8: ...d both sides are open 100 mm or more 200 mm or more if there are obstacles to both sides Open as a rule 500 mm or more if the back both sides and top are open 350 mm or more 100 mm or more Service panel Gas refrigerant pipe joint Refrigerant pipe flared 12 7 MUZ GA50 15 88 MUZ GA60 71 Liquid refrigerant pipe joint Refrigerant pipe flared 6 35 MUZ GA50 60 9 52 MUZ GA71 REQUIRED SPACE ...

Page 9: ...N902 2 1 CN5 6 5 4 3 1 CN2 2 7 TAB4 V MC W U V WHT RT61 RT62 RT68 LEV Terminal block Connector 3 Symbols below indicate 2 Use copper conductors only for field wiring diagram for servicing refer to the indoor unit electric wiring 1 About the indoor side electric wiring NOTES SYMBOL NAME SYMBOL NAME CURRENT TRANSFORMER FUSE T1AL 250V LEV EXPANSION VALVE COIL L REACTOR IPM INTELLIGENT POWER MODULE CT...

Page 10: ...10 MUZ GA60VA E3 ...

Page 11: ...3 1 CN2 2 7 V MC W U V WHT RT61 RT62 RT68 LEV Terminal block Connector 3 Symbols below indicate 2 Use copper conductors only for field wiring diagram for servicing refer to the indoor unit electric wiring 1 About the indoor side electric wiring NOTES SYMBOL NAME SYMBOL NAME CURRENT TRANSFORMER FUSE T1AL 250V LEV EXPANSION VALVE COIL L REACTOR IPM INTELLIGENT POWER MODULE HPS HIGH PRESSURE SWITCH C...

Page 12: ...r 100 Receiver Outdoor heat exchanger temperature thermistor RT68 Ambient temperature thermistor RT65 Strainer 100 MUZ GA60VA E2 Unit mm Outdoor heat exchanger Flared connection Defrost thermistor RT61 Discharge temperature thermistor RT62 Flared connection Stop valve Stop valve with service port Capillary tube 3 6 2 4 50 Capillary tube 1 8 0 6 1000 Refrigerant flow in cooling Compressor 4 way val...

Page 13: ... Receiver Outdoor heat exchanger temperature thermistor RT68 Strainer 100 Strainer 100 Ambient temperature thermistor RT65 MUZ GA60VA E3 Unit mm Outdoor heat exchanger Flared connection Defrost thermistor RT61 Discharge temperature thermistor RT62 Flared connection Stop valve Stop valve with service port Capillary tube 3 6 2 4 50 Refrigerant flow in cooling Compressor 4 way valve Refrigerant flow ...

Page 14: ...UZ GA50VA MUZ GA60VA Refrigerant piping length one way Outdoor unit precharged 1 800 15m 160 20m 260 25m 360 30m 460 7m 0 10m 60 ADDITIONAL REFRIGERANT CHARGE R410A g Calculation Xg 20g m Refrigerant piping length m 7 Outdoor unit precharged 2 000 0 165 440 715 990 1 265 Refrigerant piping length one way 15m 10m 7m Model MUZ GA71VA 20m 25m 30m Calculation Xg 55g mo Refrigerant piping length m 7 NO...

Page 15: ...t least 2 sets of wet and dry bulb thermometers to the indoor air intake as shown in the figure and at least 2 sets of wet and dry bulb thermometers to the indoor air outlet The thermometers must be attached to the position where air speed is high 2 Attach at least 2 sets of wet and dry bulb thermometers to the outdoor air intake Cover the thermometers to prevent direct rays of the sun 3 Check tha...

Page 16: ...on factors Input correction factors Input correction factors Capacity correction factors Correction of Cooling capacity The operational frequency of compressor Correction of Cooling total input The operational frequency of compressor Correction of Heating total input The operational frequency of compressor Correction of Heating capacity The operational frequency of compressor Capacity correction f...

Page 17: ...30 70 35 C 15 20 50 25 60 30 70 35 C 5 6 7 8 9 32 18 Ambient temperature C Ambient humidity Outdoor low pressure Outdoor unit current A Ambient temperature C Ambient humidity MUZ GA60VA MUZ GA60VA 1 Press EMERGENCY OPERATION switch to COOL or HEAT mode COOL Press once HEAT Press twice 2 Test run operation starts and continues to operate for 30 minutes 3 Compressor operates at rated frequency in CO...

Page 18: ...UZ GA71VA MUZ GA50VA MUZ GA60VA 10 0 9 0 8 0 7 0 6 0 5 0 4 0 2 5 10 15 20 25 16 0 15 0 14 0 13 0 12 0 11 0 10 0 2 5 10 15 20 25 12 0 11 0 10 0 9 0 8 0 7 0 6 0 2 5 10 15 20 25 1 Condition 2 Operation TEST RUN OPERATION refer to 8 3 HEAT operation Dry bulb temperature C Indoor 20 0 14 5 2 1 Outdoor 7 6 15 12 20 0 14 5 Wet bulb temperature C ...

Page 19: ...20 29 20 6 13 4 10 0 67 1260 5 88 3 94 0 67 1335 5 70 3 82 0 67 1365 29 22 6 38 3 51 0 55 1305 6 15 3 38 0 55 1388 6 00 3 30 0 55 1425 29 24 6 70 2 88 0 43 1365 6 45 2 77 0 43 1440 6 30 2 71 0 43 1485 29 26 6 90 2 14 0 31 1440 6 70 2 08 0 31 1515 6 60 2 05 0 31 1560 30 18 5 88 4 88 0 83 1200 5 63 4 67 0 83 1260 5 40 4 48 0 83 1320 30 20 6 13 4 35 0 71 1260 5 88 4 17 0 71 1335 5 70 4 05 0 71 1365 3...

Page 20: ...2 22 0 39 1785 4 90 4 46 0 91 1470 4 50 4 10 0 91 1560 5 15 4 07 0 79 1530 4 80 3 79 0 79 1605 5 45 3 65 0 67 1590 5 10 3 42 0 67 1680 5 75 3 16 0 55 1650 5 40 2 97 0 55 1725 6 05 2 60 0 43 1710 5 70 2 45 0 43 1785 4 33 2 03 0 47 1590 4 15 1 95 0 47 1620 4 63 1 62 0 35 1650 4 45 1 56 0 35 1695 4 33 2 21 0 51 1590 4 15 2 12 0 51 1620 4 63 1 80 0 39 1650 4 45 1 74 0 39 1695 4 93 1 33 0 27 1710 4 75 ...

Page 21: ...638 6 48 4 80 0 74 1716 7 35 4 56 0 62 1638 7 05 4 37 0 62 1736 6 84 4 24 0 62 1775 7 65 3 83 0 50 1697 7 38 3 69 0 50 1804 7 20 3 60 0 50 1853 8 04 3 06 0 38 1775 7 74 2 94 0 38 1872 7 56 2 87 0 38 1931 8 28 2 15 0 26 1872 8 04 2 09 0 26 1970 7 92 2 06 0 26 2028 7 05 5 50 0 78 1560 6 75 5 27 0 78 1638 6 48 5 05 0 78 1716 7 35 4 85 0 66 1638 7 05 4 65 0 66 1736 6 84 4 51 0 66 1775 7 65 4 13 0 54 1...

Page 22: ...2 44 0 38 2418 5 19 4 67 0 90 2067 4 98 4 48 0 90 2106 5 55 4 33 0 78 2145 5 34 4 17 0 78 2204 5 91 3 90 0 66 2223 5 70 3 76 0 66 2262 6 30 3 40 0 54 2291 6 12 3 30 0 54 2340 6 63 2 78 0 42 2369 6 42 2 70 0 42 2418 5 88 2 70 0 46 1911 5 40 2 48 0 46 2028 6 18 2 10 0 34 1989 5 76 1 96 0 34 2087 5 88 2 94 0 50 1911 5 40 2 70 0 50 2028 6 18 2 35 0 38 1989 5 76 2 19 0 38 2087 6 54 1 70 0 26 2067 6 12 ...

Page 23: ...2 38 0 25 2464 9 37 2 34 0 25 2538 8 34 6 42 0 77 1952 7 99 6 15 0 77 2050 7 67 5 90 0 77 2147 8 70 5 65 0 65 2050 8 34 5 42 0 65 2172 8 09 5 26 0 65 2220 9 05 4 80 0 53 2123 8 73 4 63 0 53 2257 8 52 4 52 0 53 2318 9 51 3 90 0 41 2220 9 16 3 76 0 41 2342 8 95 3 67 0 41 2416 9 80 2 84 0 29 2342 9 51 2 76 0 29 2464 9 37 2 72 0 29 2538 8 34 6 76 0 81 1952 7 99 6 47 0 81 2050 7 67 6 21 0 81 2147 8 70 ...

Page 24: ...2 81 0 37 3026 6 14 5 47 0 89 2586 5 89 5 24 0 89 2635 6 57 5 06 0 77 2684 6 32 4 87 0 77 2757 6 99 4 55 0 65 2782 6 75 4 38 0 65 2830 7 46 3 95 0 53 2867 7 24 3 84 0 53 2928 7 85 3 22 0 41 2965 7 60 3 11 0 41 3026 6 96 3 13 0 45 2391 6 39 2 88 0 45 2538 7 31 2 41 0 33 2489 6 82 2 25 0 33 2611 6 96 3 41 0 49 2391 6 39 3 13 0 49 2538 7 31 2 71 0 37 2489 6 82 2 52 0 37 2611 7 74 1 93 0 25 2586 7 24 ...

Page 25: ...OUTDOOR WB INDOOR 10 5 0 5 10 15 20 DB Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT 15 21 26 4 28 1294 5 17 1552 6 05 1751 6 94 1891 7 82 2010 8 64 2070 9 52 2109 4 08 1393 4 90 1652 5 78 1831 6 60 1970 7 48 2070 8 30 2129 9 15 2209 3 67 1493 4 56 1751 5 37 1930 6 26 2070 7 14 2169 7 96 2229 8 84 2289 MSZ GA50VA MUZ GA50VA MSZ GA60VA MUZ GA60VA CAPACITY 8 1 kW INPUT 2450 W OUTDOOR WB IN...

Page 26: ... seconds HEAT 5 seconds ON or OFF ON or OFF 9 1 OUTDOOR FAN MOTOR CONTROL The fan motor turns ON OFF interlocking with the compressor ON The fan motor turns ON 5 seconds before the compressor starts up OFF The fan motor turns OFF 15 seconds after the compressor has stopped running Discharge temperature thermistor Indoor coil temperature thermistor Defrost thermistor Fin temperature thermistor Outd...

Page 27: ...y voltage 2 Check the indoor outdoor connecting wire for mis wiring 2 Take care of the following during servicing 1 Before servicing the air conditioner be sure to turn OFF the main unit first with the remote controller then after confirming the horizontal vane is closed turn OFF the breaker and or disconnect the power plug 2 Be sure to turn OFF the power supply before removing the front panel the...

Page 28: ... and confirm the abnormal point with the indoor unit failure mode table Refer to indoor unit service manual Make sure to check at least two consecutive blinking cycles W2 Turn ON the power supply Preparation of the remote controller 1 While pressing both OPERATION SELECT button and TOO COOL button on the remote controller at the same time press RESET button 2 First release RESET button And release...

Page 29: ...ure mode recall function mentioned above 2Press OPERATE STOP ON OFF button of the remote controller the set temperature is displayed with the remote controller headed towards the indoor unit 3Press EMERGENCY OPERATION switch so that the memorized abnormal condition is deleted 4Release the failure mode recall function according to Releasing the failure mode recall function mentioned above Repair th...

Page 30: ...or when converter protection stop or bus bar voltage protection stop is continuously performed 3 times within 3 minutes after start up Thermistor shorts or opens during compressor running 28A current flows into intelligent power module High pressure is detected with the high pressure switch HPS during operation The outdoor heat exchanger temperature exceeds 70 during cooling or the indoor gas pipe...

Page 31: ...e compressor is operating A failure is detected in the operation of the converter during operation The bus bar voltage exceeds 400V or falls to 200V or below during compressor operating The bus bar voltage exceeds 400V or falls to 50V or below during compressor operating Communication error between P C boards Current sensor Zero cross detecting circuit Converter Bus bar voltage 1 Bus bar voltage 2...

Page 32: ... signal Left lamp 2 time flash Cause Indoor unit Trouble of room temp erature indoor coil thermistor Left lamp 3 time flash Cause Indoor unit Trouble of indoor fan motor Left lamp 5 time flash Cause Outdoor unit Outdoor power system abnormality Left lamp 6 time flash Cause Outdoor unit Trouble of thermistor in outdoor unit Left lamp 7 time flash Cause Outdoor unit Trouble of outdoor control system...

Page 33: ...re protection High pressure protection 8 times Goes out Converter protection Replace the power board Bus bar voltage protection 1 Replace the power board Bus bar voltage protection 2 13 times Goes out Outdoor fan motor Refer to 11 6 G Check of outdoor fan motor Lighting 8 times Current sensor protection Replace the power board Lighting 11 times Communication between P C boards protection Check the...

Page 34: ...ty of the product but check the following points Check if indoor filters are clogged Check if refrigerant is short Check if indoor outdoor unit air circulation is short cycled Twice Lighting Once Lighting The discharge temperature exceeds 100 during operation The frequency of the compressor is kept 80Hz or more and the discharge temperature is kept under 39 for more than 20 minutes The outdoor hea...

Page 35: ...e using a tester Part temperature 10 C 40 C Linear expansion valve LEV WHT RED YLW BRN ORN BLU Color of lead wire Normal WHT RED RED ORN YLW BRN BRN BLU 37 4 Ω 53 9 Ω GA50 60VA 1 29 Ω 1 49 Ω GA71VA U RED WHT BLK V W W V U Normal RED BLK BLK WHT WHT RED 13 4 Ω 16 4 Ω Pressure 3 7 0 15 MPa 4 8 MPa Open Close 0 05 0 1 High pressure switch HPS MUZ GA60VA MUZ GA71VA E3 Color of lead wire Measure the re...

Page 36: ...rcuit Is there voltage of 230V AC in the power supply terminal block Is the output voltage from the noise filter P C board 230V AC Is the input voltage to the outdoor electronic control P C board 325V DC Check the power supply cable Replace the outdoor electronic control P C board Replace the noise filter P C board Is fuse F64 blown Is the input voltage to the power board 230V AC Replace the fuse ...

Page 37: ...upply Check once more if the indoor outdoor connecting wire is not mis wiring Short circuit outdoor terminal block S2 and S3 W1 B Turn ON the power supply Check the wiring Correct them Turn OFF the power supply Remove the short circuit between outdoor terminal block S2 and S3 Turn ON the power supply Is there amplitude of 10 to 20V DC between outdoor terminal block S2 and S3 Confirmation of serial...

Page 38: ...connector CN912 in noise filter P C board Is there normal resistance to R V coil 1 Disconnect the lead wire leading to the compressor 2 3 minutes after turning ON the power supply start EMERGENCY OPERATION in COOL mode Is there voltage of 230V AC between pin1 and pin 2 at connector CN912 W 1 Turn OFF power supply of indoor and outdoor unit and disconnect the connector CN781 in the outdoor electron...

Page 39: ...RGENCY OPERATION Is output balanced Clarify the causes by counting time until the inverter stops 0 to 10 seconds compressor rare short 10 to 60 seconds compressor lock 60 seconds to 5minutes refrigerant circuit defective 5 minutes or more normal Measure the voltage between each lead wire leading to the compressor U BLK V WHT V WHT W RED W RED U BLK Is there output voltage Turn OFF power supply of ...

Page 40: ...oor power board Disconnect the connector in the outdoor electronic control P C board or the outdoor power board see below table and measure the resistance of thermistor Is the thermistor normal Refer to 11 7 1 Does the unit operate for 10 minutes or more without showing thermistor abnormality Replace the thermistor W Normal Replace the outdoor electronic control P C board Yes No No Yes Yes No Fixe...

Page 41: ...ontrol P C board 2 Check the resistance of HPS 1 minute after the outdoor unit power supply was turned OFF Check the resistance between each terminal Reconnect CN681 Turn ON power supply to the indoor and outdoor unit 3 minutes later start EMERGENCY OPERATION Is HPS protection displayed immediately after compressor starts Replace HPS Replace the electronic control P C board Normal ...

Page 42: ...ise 4 Layout of indoor outdoor unit of the air conditioner indoor outdoor wiring earth wire antennas wiring from antennas receiver 5 Electric field intensity of the broadcast station affected by the electromagnetic noise 6 Presence or absence of amplifier such as booster 7 Operation condition of air conditioner when the electromagnetic noise enters in 1 Turn OFF the power supply once and then turn...

Page 43: ... 5V DC pulse wave GND power board CN781 CN795 12V DC pulse wave LEV 20 10 0 10 20 30 40 100 90 80 70 60 50 40 30 20 10 0 0 10 20 30 40 50 60 70 80 200 180 160 140 120 100 80 60 40 20 0 Resistance k Resistance k Temperature Temperature Defrost thermistor RT61 Ambient temperature thermistor RT65 Outdoor heat exchanger temperature thermistor RT68 Fin temperature thermistor RT64 0 10 20 30 40 50 60 70...

Page 44: ...30V AC Input 230V AC Output CN901 To electronic control P C board MUZ GA50VA MUZ GA60VA MUZ GA71VA F64 FUSE 250V 2A F911 FUSE 250V 1A 2 Noise filter P C board CN902 To power board CN903 To power board 230V AC Output NR64 VARISTOR ...

Page 45: ... used 6 5 15V 7 5 15V Signal reception From electronic control P C board 5V DC pulse wave CN3 Fin temperature thermistor RT64 325 370V DC Output Red White Connect to the compressor Voltage among phases 5V to 180V Connect to the earth CN5 Primary current detection Connect to the noise filter CN2 Connect to the controller board 1 5 Signal transmission To electronic control P C board 5V DC pulse wave...

Page 46: ...king lever MUZ GA50VA MUZ GA60VA MUZ GA71VA NOTE These photos are MUZ GA71VA Other models are almost the same as MUZ GA71VA OPERATING PROCEDURE PHOTOS 1 Removing the cabinet 1 Remove the screws of the service panel 2 Remove the screws of the top panel 3 Remove the screw of the valve cover 4 Remove the service panel 5 Remove the top panel 6 Remove the valve cover 7 Disconnect the power supply and i...

Page 47: ...elay panel 6 Remove the inverter assembly 7 Disconnect all connectors and lead wires on the electronic control P C board 8 Remove the electronic control P C board from the inverter assembly 9 Remove the screws fixing the power board assembly 10 Disconnect all connectors and lead wires on the power board 11 Remove the power board from the inverter assembly 12 Disconnect all connectors and lead wire...

Page 48: ...1 Remove the top panel cabinet and service panel Refer to 1 2 Remove the back panel Refer to 1 3 Disconnect the following connectors Electronic control P C board CN661 Discharge temperature thermistor defrost thermistor and outdoor heat exchanger temperature thermistor CN663 Ambient temperature thermistor 4 Pull out the defrost thermistor from its holder Photo 6 5 Pull out the discharge temperatur...

Page 49: ...s until the pressure gauge shows 0 kg cm2 0 MPa 5 Detach the welded part of the suction and the discharge pipe connected with compressor Photo 9 6 Remove the compressor nuts 7 Remove the compressor 8 Detach the welded part of 4 way valve and pipe Photo 8 7 Removing the reactor 1 Remove the top panel Refer to 1 2 Disconnect the reactor lead wire 3 Remove the screws of the reactor and remove the rea...

Page 50: ...13 10 12 2 5 6 7 8 16 14 20 22 23 24 25 29 30 31 3 13 PARTS LIST non RoHS compliant MUZ GA50VA MUZ GA60VA MUZ GA71VA 13 1 OUTDOOR UNIT STRUCTURAL PARTS ELECTRICAL PARTS AND FUNCTIONAL PARTS 11 15 17 18 21 28 27 26 ...

Page 51: ... SWITCH COMPRESSOR RUBBER SET COMPRESSOR RUBBER SET COMPRESSOR COMPRESSOR STOP VALVE GAS STOP VALVE GAS STOP VALVE LIQUID STOP VALVE LIQUID EXPANSION VALVE EXPANSION VALVE EXPANSION VALVE COIL OIL SEPARATOR R V COIL 4 WAY VALVE VALVE COVER SERVICE PANEL OUTDOOR ELECTRONIC CONTROL P C BOARD OUTDOOR ELECTRONIC CONTROL P C BOARD OUTDOOR ELECTRONIC CONTROL P C BOARD TERMINAL BLOCK TERMINAL BLOCK REACT...

Page 52: ...GA71VA 13 2 ACCESSORY Symbol in Wiring Diagram Q ty unit Remarks Part No No Part Name MUZ GA50 VA E1 MUZ GA60 VA E1 MUZ GA71 VA E1 E02 817 704 E02 444 705 1 2 DRAIN SOCKET DRAIN CAP 33 1 2 1 2 1 2 1 2 PARTS LIST non RoHS compliant ...

Page 53: ...53 ...

Page 54: ...13 10 12 2 5 6 7 8 16 14 20 22 23 24 25 29 30 31 3 14 RoHS PARTS LIST RoHS compliant MUZ GA50VA MUZ GA60VA MUZ GA71VA 14 1 OUTDOOR UNIT STRUCTURAL PARTS ELECTRICAL PARTS AND FUNCTIONAL PARTS 11 15 17 18 21 28 27 26 ...

Page 55: ...SSOR STOP VALVE GAS STOP VALVE GAS STOP VALVE LIQUID STOP VALVE LIQUID EXPANSION VALVE EXPANSION VALVE EXPANSION VALVE COIL OIL SEPARATOR R V COIL R V COIL 4 WAY VALVE 4 WAY VALVE VALVE COVER SERVICE PANEL OUTDOOR ELECTRONIC CONTROL P C BOARD OUTDOOR ELECTRONIC CONTROL P C BOARD OUTDOOR ELECTRONIC CONTROL P C BOARD OUTDOOR ELECTRONIC CONTROL P C BOARD TERMINAL BLOCK TERMINAL BLOCK REACTOR NOISE FI...

Page 56: ...DA KU TOKYO 100 8310 JAPAN C C Copyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO LTD Distributed in Sep 2007 No OB389 REVISED EDITION F 6 Distributed in Jul 2007 No OB389 REVISED EDITION E 6 Distributed in Jun 2007 No OB389 REVISED EDITION D 6 Distributed in Apr 2007 No OB389 REVISED EDITION C 6 Distributed in Aug 2006 No OB389 REVISED EDITION B 6 Distributed in Jun 2006 No OB389 REVISED EDITION A...

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