Mitsubishi Electric MUZ-GA50VA-E1 Service Manual Download Page 53 | Manualshive

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MUZ-GA50VA MUZ-GA60VA MUZ-GA71VA
14-1. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND
FUNCTIONAL

PARTS

Symbol

in Wiring

Diagram

Q'ty/unit

Remarks

Part No.

RoHS

No.

Part Name

MUZ-GA50

VA -

E1

MUZ-GA60

VA -

E1

E2

E1

E2

MUZ-GA71

VA -

E12 819 297
E12 851 630
E12 853 630
E12 938 301
E12 851 501
E12 851 290
E12 853 290
E12 819 232
E12 819 009
E12 D84 521
E12 853 646
E12 C34 506
E12 853 506
E12 939 900
E12 C06 900
E12 C37 900
E12 853 900
E12 851 661
E12 819 661
E12 821 662
E12 822 662
E12 851 640
E12 853 640
E12 851 493
E12 853 299
E12 935 490
E12 D02 490
E12 891 961
E12 C18 961
E12 819 650
E12 819 245
E12 D01 450
E12 C96 450
E12 C97 450
E12 D02 450
E12 935 374
E12 823 375
E12 851 337
E12 935 444
E12 935 309
E12 851 308
E12 935 440
E12 B79 440
E12 819 233
E12 817 009
E12 851 515
E12 851 936
E12 853 936
E12 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

G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G
G

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
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
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 FILTER P.C. BOARD
AMBIENT TEMPERATURE THERMISTOR
THERMISTOR SET
POWER BOARD
POWER BOARD
BACK PANEL(OUT)
HANDLE
MOTOR SUPPORT
CAPILLARY TUBE(TAPER PIPE)
CAPILLARY TUBE(TAPER PIPE)
CAPILLARY TUBE

RC0J60-

Including ice guard

3RUBBERS/SET
3RUBBERS/SET
SNB130FLDH1
SNB130FLEH1
SNB130FGBH
TNB220FMCH
Ø12.7
Ø15.88
Ø6.35
Ø9.52

3P
3P

Including heat sink and RT64

Including heat sink and RT64

Ø3.6xØ2.4x50
Ø3.6xØ2.4x50
Ø1.8xØ0.6x1000

MF

HPS

MC
MC
MC
MC

LEV

21S4
21S4

TB1
TB2

L

RT65

RT61,RT62,RT68

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

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

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

3

1

1

1

1
1
1
1

1

1
1

1

1
1
1
1
1
1
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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

DEFROST, DISCHARGE

OUTDOOR HEAT EXCHANGER

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

E3

Part number that is circled is not shown in the illustration.

RoHS PARTS LIST (RoHS compliant)

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Summary of Contents for MUZ-GA50VA-E1

Page 1: ...ST 50 14 RoHS PARTS LIST 52 Models SPLIT TYPE AIR CONDITIONERS MUZ GA50VA E1 MUZ GA60VA E1 MUZ GA60VA E2 MUZ GA60VA E3 MUZ GA71VA E1 MUZ GA71VA E2 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 H Indoor unit service ma...

Page 2: ... and RoHS PARTS LIST have been changed Revision E REFRIGERANT SYSTEM DIAGRAM has been changed for MUZ GA60VA E2 Revision F MUZ GA60VA E3 has been added Revision G The fan guard for MUZ GA50VA E MUZ GA60VA E and MUZ GA71VA E has been changed Use the specified refrigerant only Never use any refrigerant other than that specified Doing so may cause a burst an explosion or fire when the unit is being u...

Page 3: ...hat of R22 some special tools and piping parts materials are required Refer to the table below 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 For refrigerant piping use clean pressure proof parts materials specifically designed for R410A Refer to 2 Refrigerant pi...

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: ...e 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 ...

Page 6: ... 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 840x850x330 58 2 2 0 NEO22 Heating 8 1 0 9 9 6 2 940 2 210 10 6 2 390 98 0 10 3 3 31 55 53 800 620 MUZ GA71VA Single phase 230V 50Hz 20 8 93 0 30 SNB130FLDH or SNB130FLDH1 SNB130FLEH1 SNB13...

Page 7: ...mperature 6 C 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 R...

Page 8: ...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 Ø12 7 MUZ GA50 Ø15 88 MUZ GA60 71 Liquid refrigerant pipe joint Refrigerant pipe flared Ø6 35 MUZ GA50 60 Ø9 52 MUZ GA71 REQUIRED SPACE ...

Page 9: ...C 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 CT61 FUSE T2AL 250V F64 CT1 2 CURRENT TRA...

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: ...00 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 Ø3 6 x Ø2 4 x 50 Capillary tube Ø1 8 x Ø0 6 x 1000 Refrigerant flow in cooling Compressor ...

Page 13: ...100 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 Ø3 6 x Ø2 4 x 50 Refrigerant flow in cooling Compressor 4 way valve Refriger...

Page 14: ... 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 20 g m x 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 55 g m x Refrigerant piping length m 7...

Page 15: ...fference 1 Attach at 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 ...

Page 16: ...nput 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 factors Input...

Page 17: ...5 60 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 ...

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

Page 19: ... 1320 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 71 136...

Page 20: ...70 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 ...

Page 21: ...4 1638 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 5...

Page 22: ...42 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 ...

Page 23: ...51 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 ...

Page 24: ...60 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 ...

Page 25: ... 3 67 1493 4 56 1751 5 37 1930 6 26 2070 7 14 2169 7 96 2229 8 84 2289 INDOOR 10 5 0 5 10 15 20 DB C Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT 15 21 26 CAPACITY 8 1 kW INPUT 2450 W OUTDOOR WB C INDOOR 10 5 0 5 10 15 20 DB C Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT 15 21 26 5 10 1625 6 16 1950 7 21 2200 8 26 2375 9 32 2525 10 29 2600 11 34 2650 4 86 1750 5 83 2075 6 89 ...

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: ...tage 2 Check the indoor outdoor connecting wire for miswiring 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 and 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 cabine...

Page 28: ...n 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 2 Turn ON the power supply Preparation of the remote controller While pressing both OPERATION SELECT button and TOO COOL button on the remote controller at the same time press RESET button First release RESET button Hold down the o...

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

Page 30: ...onverter 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 Cduring cooling or the indoor gas pipe tempera...

Page 31: ...erformed 10 times Zero cross signal cannot be detected while the 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 ...

Page 32: ...t 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 Refer to 11 6 How to check of mis wiring and s...

Page 33: ...Replace the power board Bus bar voltage protection 1 Check the voltage of power supply Replace the power board or the outdoor electronic control P C board Refer to 11 6 Check of bus bar voltage Bus bar voltage protection 2 13 times Goes out Outdoor fan motor Refer to 11 6 Check of outdoor fan motor Lighting 8 times Current sensor protection Replace the power board Lighting 11 times Communication b...

Page 34: ...f 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 C during operation The frequency of the compressor is kept 80Hz or more and the discharge temperature is kept under 39 C for more than 20 minutes The outdoor hea...

Page 35: ...rminals using a tester Winding temperature 10 C 40 C Normal GA50 GA60VA E1 E2 GA60VA E3 GA71VA 0 40 Ω 0 49 Ω 0 86 Ω 1 06 Ω 1 29 Ω 1 49 Ω Outdoor fan motor Measure the resistance between lead wires using a tester Part temperature 10 C 40 C Color of lead wire Normal RED BLK 13 4 Ω 16 4 Ω BLK WHT WHT RED R V coil Measure the resistance using a tester Part temperature 10 C 40 C Normal MUZ GA60VA E3 Ot...

Page 36: ...uit Is there voltage of 230 VAC in the power supply terminal block Is the output voltage from the noise filter P C board 230 VAC Is the input voltage to the outdoor electronic control P C board 325 VDC 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 230 VAC Replace the fuse Re...

Page 37: ...ply Check once more if the indoor outdoor connecting wire is not mis wiring Short circuit outdoor terminal block S2 and S3 1 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 si...

Page 38: ...onnector 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 230 VAC between pin1 and pin 2 at connector CN912 1 Turn OFF power supply of indoor and outdoor unit and disconnect the connector CN781 in the outdoor electronic ...

Page 39: ...ENCY 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 in...

Page 40: ...t exchanger temperature Ambient temperature Fin temperature Symbol RT61 RT62 RT68 RT65 RT64 Connector Pin No Thermistor Board Between CN661 pin1 and pin2 Between CN661 pin3 and pin4 Between CN661 pin7 and pin8 Between CN663 pin1 and pin2 Between CN3 pin1 and pin2 Outdoor electronic control P C board Outdoor power board When RT64 is abnormal replace the outdoor power board Yes No No Yes Yes No Fixe...

Page 41: ...ormal I Check of bus bar voltage Check the voltage of power supply Confirm outdoor unit failure mode recall function Refer to 11 2 2 Blink 5 times Confirm LED1 indication lamp on the outdoor electronic control P C board Replace the power board Blink 9 times Replace the outdoor electronic control P C board Turn OFF power supply before removing P C board Confirm LED1 indication lamp on the outdoor e...

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: ...AND VOLTAGE 1 Outdoor electronic control P C board MUZ GA50VA MUZ GA60VA MUZ GA71VA LED 1 LED 2 CN801 325 VDC 370 VDC Input CN932 20 90 VAC GND 5 V 5 VDC pulse wave To fan motor Defrost thermistor RT61 Discharge temperature thermistor RT62 Outdoor heat exchanger temperature thermistor RT68 Rush current relay R V coil 12 VDC 15 V 15 V CN931 CN661 CN701 Signal transmission To power board 5 VDC pulse...

Page 44: ...0 VAC Input 230 VAC Output CN901 To electronic control P C board MUZ GA50VA MUZ GA60VA MUZ GA71VA F64 FUSE T2AL250V F911 FUSE T1AL250V 2 Noise filter P C board CN902 To power board CN903 To power board 230 VAC Output NR64 VARISTOR ...

Page 45: ...used 6 5 15 V 7 5 15 V Signal reception From electronic control P C board 5 VDC pulse wave CN3 Fin temperature thermistor RT64 325 370 VDC 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 5 VDC pulse wav...

Page 46: ...rew of the top panel Screws of the cabinet Screws of the cabinet Screws of the top panel Screws of the cabinet Screw of the service panel Screw of the valve cover Screw of the motor support Set screws of the back panel Screws of the back panel 1 Slide the sleeve and check if there is a locking lever or not 2 The terminal with this connector has the locking mechanism Slide the sleeve Pull the termi...

Page 47: ...e relay 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 w...

Page 48: ...ture thermistor 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 5 Pull out the discharge te...

Page 49: ...the pipes until the pressure gauge shows 0 kg cm2 0 MPa 5 Detach the brazed part of the suction and the discharge pipe connected with compressor 6 Remove the compressor nuts 7 Remove the compressor 8 Detach the brazed part of 4 way valve and pipe 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 reactor Pho...

Page 50: ... 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 13 2 ACCESSORY 33 34 ...

Page 51: ...OP 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 POWE...

Page 52: ...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 53: ...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 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...

Page 54: ...SHI ELECTRIC ENGINEERING CO LTD Distributed in Jun 2011 No OB389 REVISED EDITION H Distributed in Jun 2010 No OB389 REVISED EDITION G 6 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...

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