Service manual

ManualsBrandsMitsubishi ManualsAir ConditionerMSZ-GA60 VA

SERVICE MANUAL

CONTENTS

1. TECHNICAL CHANGES ··································· 3

2. PART NAMES AND FUNCTIONS ····················· 6

3. SPECIFICATION ················································ 6

4. NOISE CRITERIA CURVES ······························ 7

5. OUTLINES AND DIMENSIONS ························ 8

6. WIRING DIAGRAM ············································ 9

7. REFRIGERANT SYSTEM DIAGRAM ············· 12

8. PERFORMANCE CURVES ····························· 15

9. ACTUATOR CONTROL ··································· 26

10. SERVICE FUNCTIONS ···································· 27

11. TROUBLESHOOTING ····································· 27

12. DISASSEMBLY INSTRUCTIONS ···················· 46

13. PARTS LIST ····················································· 50

14. RoHS PARTS LIST ·········································· 52

Models

SPLIT-TYPE AIR CONDITIONERS

MUZ-GA50VA -

MUZ-GA60VA -

MUZ-GA71VA -

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 manual

MSZ-GA•VA Series (OB388)

Please void OB389 REVISED EDITION-G.

OUTDOOR UNIT

Revision H:

• Errors in TROUBLESHOOTING have

been corrected.

Summary of content (54 pages)

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Revision H: • Errors in TROUBLESHOOTING have been corrected. SPLIT-TYPE AIR CONDITIONERS Please void OB389 REVISED EDITION-G. OUTDOOR UNIT No. OB389 HFC REVISED EDITION-H utilized SERVICE MANUAL R410A Models MUZ-GA50VA MUZ-GA60VA MUZ-GA60VA MUZ-GA60VA MUZ-GA71VA MUZ-GA71VA - E1 E1 E2 E3 E1 E2 Indoor unit service manual MSZ-GA•VA Series (OB388) CONTENTS 1. TECHNICAL CHANGES ··································· 3 2. PART NAMES AND FUNCTIONS ····················· 6 3.
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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 used, serviced, or disposed of. Correct refrigerant is specified in the manuals and on the spec labels provided with our products. We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused by failure to follow the instructions. Revision A : • RoHS PARTS LIST has been added.
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1 TECHNICAL CHANGES MUZ-A18YV - E1 MUZ-A24YV - E1 MUZ-A26YV - E1 1. 2. 3. 4. 5. 6. MUZ-GA50VA - E1 MUZ-GA60VA - E1 MUZ-GA71VA - E1 Indication of capacity has been changed. (BTU base kW base) Outdoor electronic control P.C. board has been changed. Noise filter P.C. board has been changed. Length of fan motor lead wire has been changed. Shape of relay panel has been changed. Signal of terminal block has been changed. MUZ-GA60VA - E1 MUZ-GA60VA - E2 1. Compressor has been changed.
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Compressor New Specification Current Specification The incompatible refrigeration oil easily separates from Since refrigerant and refrigeration oil are compatible, refrigerant and is in the upper layer inside the suction muffler. refrigeration oil goes back to the compressor through the Raising position of the oil back hole enables to back the lower position oil back hole. refrigeration oil of the upper layer to flow back to the compressor.
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2. Refrigerant piping Specifications Use the refrigerant pipes that meet the following specifications. Outside diameter Pipe For liquid For gas mm Wall thickness 6.35 0.8 mm 9.52 0.8 mm Heat resisting foam plastic 12.7 0.8 mm Specific gravity 0.045 Thickness 8 mm 15.88 1.0 mm Insulation material • Use a copper pipe or a copper-alloy seamless pipe with a thickness of 0.8 mm (6.35, 9.52, 12.7), 1.0 mm (15.88). Never use any pipe with a thickness less than 0.8 mm (6.35, 9.52, 12.7), 1.0 mm (15.
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2 PART NAMES AND FUNCTIONS MUZ-GA50VA MUZ-GA60VA MUZ-GA71VA ACCESSORIES Air inlet (back and side) Piping Drain socket 1 Drain cap Ø33 2 Drain hose Air outlet Drain outlet 3 SPECIFICATION Outdoor model MUZ-GA50VA Function Cooling Heating Single phase 230V,50Hz 5.0(0.9-5.9) 5.9(0.9-7.8) 2.5 — 2,940/1,650 2,940/2,210 20 6.23 7.01 1,410 1,580 98.4 98.0 7.46 5.93 6.71 0.30 3.42 3.62 Power supply Electrical data Capacity Capacity Rated frequency (Min.-Max.
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Specifications and rated conditions of main electric parts Model Item Smoothing capacitor MUZ-GA60VA MUZ-GA50VA (CB1,2,3) 560μF 450V Current transformer (CT1,2) ETQ19Z68AY Current transformer (CT61) ETQ19Z53AY Fuse (F64) 250V 2A Fuse (F801) 250V 3.
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5 OUTLINES AND DIMENSIONS MUZ-GA50VA MUZ-GA60VA MUZ-GA71VA Unit: mm REQUIRED SPACE Open as a rule 500 mm or more if the front and both sides are open 515 299 40 100 mm or more 200 mm or more if there are obstacles to both sides 51 34 66 360 330 100 mm or more 500 840 121 80 Open as a rule 500 mm or more if the back, both sides and top are open 350 mm or more Service panel 155 90 35° 30° 430 850 Liquid refrigerant pipe joint Refrigerant pipe (flared) Ø6.35 (MUZ-GA50/60) Ø9.
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SYMBOL CB1~3 CT1, 2 CT61 F64 F801 F911 HC930 IPM L LEV PE NOISE FILTER P.C.BOARD GRN/YLW N S3 RED BLU WHT CT61 F64 1 2 SYMBOL MC MF NF NR64 PFC R64A,B R937A, B RS1~4 RT61 RT62 RED RT61 RT62 RT65 BLK BLK BLK RT68 LEV 6 CN795 S R CN4 1 2 1 2 CN701 RS2 RS1 T801 1 LD1 3 RS4 RS3 CT1 U U CN932 RED WHT BLK GRN MF POWER RT64 BOARD BLK WHT MC W RED V GRY PNK ORN BLU YLW LD9 IPM V CT2 W NOTES: 1.
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MUZ-GA60VA - E3 10
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SYMBOL CB1~3 CT1, 2 CT61 F64 F801 F911 HC930 HPS IPM L LEV PE NOISE FILTER P.C.
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7 REFRIGERANT SYSTEM DIAGRAM MUZ-GA50VA MUZ-GA60VA - E1 Unit: mm Refrigerant pipe Ø12.7 (MUZ-GA50VA) Muffler (with heat insulator) Ø15.88 (MUZ-GA60VA) 4-way valve #100 Stop valve (with service port) Flared connection Discharge temperature thermistor RT62 Defrost thermistor RT61 Outdoor heat exchanger Ambient temperature thermistor RT65 Compressor Flared connection Strainer Receiver #100 Stop valve LEV Outdoor heat exchanger temperature thermistor RT68 Strainer #100 Capillary tube Ø3.6 x Ø2.
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MUZ-GA60VA - E3 Unit: mm Refrigerant pipe Ø15.88 (with heat insulator) Muffler 4-way valve #100 Stop valve (with service port) Flared connection High-pressure switch Discharge temperature thermistor RT62 Defrost thermistor RT61 Outdoor heat exchanger Ambient temperature thermistor RT65 Compressor Flared connection LEV Strainer Receiver #100 Stop valve Outdoor heat exchanger temperature thermistor RT68 Strainer #100 Capillary tube Ø3.6 x Ø2.4 x 50 Refrigerant pipe Ø6.
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MAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCE Refrigerant piping : m Max. Height Max. length difference A B Model Piping size O.D : mm Liquid Gas MUZ-GA50VA 12.7 MUZ-GA60VA 30 15 6.35 15.88 MUZ-GA71VA 9.52 Indoor unit Max. Height difference B Refrigerant Piping Max.
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8 PERFORMANCE CURVES MUZ-GA50VA MUZ-GA60VA MUZ-GA71VA The standard specifications apply only to the operation of the air conditioner under normal conditions. Since operating conditions vary according to the areas where these units are installed, the following information has been provided to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve. (1) GUARANTEED VOLTAGE 198 ~ 264 V, 50 Hz (2) AIR FLOW Air flow should be set at MAX.
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23.4 27.9 22.3 21.6 25.7 20.4 19.8 23.6 18.5 18.0 21.4 16.7 16.2 19.3 17.2 12.6 15.0 11.1 10.8 12.9 lb ir ea tak in or u y-b Dr ) °C e( tur ra pe tem ake int oor Ind u ry-b air D (°C) ture pera m lb te o Ind MUZ-GA71VA at Rated frequency 14.4 13.0 MUZ-GA60VA at Rated frequency 14.8 MUZ-GA50VA at Rated frequency Indoor air Dry-bulb temperature difference (degree) 24.
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8-3. TEST RUN OPERATION (How to operate fixed-frequency operation) 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 COOL mode or 58Hz in HEAT mode. 4. Indoor fan operates at High speed. 5. After 30 minutes, test run operation finishes and EMERGENCY OPERATION starts (Operation frequency of compressor varies). 6.
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HEAT operation Condition: Indoor Outdoor Dry bulb temperature (ºC) 20.0 2 7 15 20.0 Wet bulb temperature (ºC) 14.5 1 6 12 14.5 Operation: TEST RUN OPERATION (refer to 8-3.) MUZ-GA50VA 10.0 Outdoor unit current (A) 9.0 8.0 7.0 6.0 5.0 4.0 2 5 10 15 20 25(°C) Ambient temperature(°C) MUZ-GA60VA MUZ-GA71VA 16.0 12.0 15.0 Outdoor unit current (A) Outdoor unit current (A) 11.0 14.0 10.0 13.0 12.0 11.0 10.0 2 5 10 15 20 Ambient temperature(°C) 25(°C) 9.0 8.0 7.0 6.
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PERFORMANCE DATA COOL operation at Rated frequency MSZ-GA50VA: MUZ-GA50VA CAPACITY:5.0(kW) SHF:0.65 21 INDOOR INDOOR DB(°C) WB(°C) Q SHC SHF 21 18 5.88 2.76 0.47 21 20 6.13 2.14 0.35 22 18 5.88 3.00 0.51 22 20 6.13 2.39 0.39 22 22 6.38 1.72 0.27 23 18 5.88 3.23 0.55 23 20 6.13 2.63 0.43 23 22 6.38 1.98 0.31 24 18 5.88 3.47 0.59 24 20 6.13 2.88 0.47 24 22 6.38 2.23 0.35 24 24 6.70 1.54 0.23 25 18 5.88 3.70 0.63 25 20 6.13 3.12 0.51 25 22 6.38 2.49 0.39 25 24 6.70 1.81 0.27 26 18 5.88 3.94 0.67 26 20 6.
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PERFORMANCE DATA COOL operation at Rated frequency MSZ-GA50VA: MUZ-GA50VA CAPACITY: 5.0(kW) INDOOR INDOOR DB(°C) WB(°C) 21 21 22 22 22 23 23 23 24 24 24 24 25 25 25 25 26 26 26 26 26 27 27 27 27 27 28 28 28 28 28 29 29 29 29 29 30 30 30 30 30 31 31 31 31 31 32 32 32 32 32 NOTE 18 20 18 20 22 18 20 22 18 20 22 24 18 20 22 24 18 20 22 24 26 18 20 22 24 26 18 20 22 24 26 18 20 22 24 26 18 20 22 24 26 18 20 22 24 26 18 20 22 24 26 SHF: 0.65 Q 4.90 5.15 4.90 5.15 5.45 4.90 5.15 5.45 4.90 5.15 5.45 5.75 4.
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PERFORMANCE DATA COOL operation at Rated frequency MSZ-GA60VA: MUZ-GA60VA CAPACITY: 6.0(kW) INDOOR INDOOR DB(°C) WB(°C) 21 21 22 22 22 23 23 23 24 24 24 24 25 25 25 25 26 26 26 26 26 27 27 27 27 27 28 28 28 28 28 29 29 29 29 29 30 30 30 30 30 31 31 31 31 31 32 32 32 32 32 NOTE 18 20 18 20 22 18 20 22 18 20 22 24 18 20 22 24 18 20 22 24 26 18 20 22 24 26 18 20 22 24 26 18 20 22 24 26 18 20 22 24 26 18 20 22 24 26 18 20 22 24 26 Q 7.05 7.35 7.05 7.35 7.65 7.05 7.35 7.65 7.05 7.35 7.65 8.04 7.05 7.35 7.
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PERFORMANCE DATA COOL operation at Rated frequency MSZ-GA60VA: MUZ-GA60VA CAPACITY:6.0(kW) INDOOR INDOOR DB(°C) WB(°C) 21 21 22 22 22 23 23 23 24 24 24 24 25 25 25 25 26 26 26 26 26 27 27 27 27 27 28 28 28 28 28 29 29 29 29 29 30 30 30 30 30 31 31 31 31 31 32 32 32 32 32 NOTE 18 20 18 20 22 18 20 22 18 20 22 24 18 20 22 24 18 20 22 24 26 18 20 22 24 26 18 20 22 24 26 18 20 22 24 26 18 20 22 24 26 18 20 22 24 26 18 20 22 24 26 Q 5.88 6.18 5.88 6.18 6.54 5.88 6.18 6.54 5.88 6.18 6.54 6.90 5.88 6.18 6.54 6.
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PERFORMANCE DATA COOL operation at Rated frequency MSZ-GA71VA: MUZ-GA71VA CAPACITY:7.1(kW) INPUT:2420(W) 21 Q SHC SHF 18 8.34 3.75 0.45 8.70 2.87 0.33 20 18 8.34 4.09 0.49 8.70 3.22 0.37 20 9.05 2.26 0.25 22 8.34 4.42 0.53 18 20 8.70 3.57 0.41 22 9.05 2.63 0.29 18 8.34 4.76 0.57 20 8.70 3.91 0.45 22 9.05 2.99 0.33 24 9.51 2.00 0.21 18 8.34 5.09 0.61 20 8.70 4.26 0.49 22 9.05 3.35 0.37 24 9.51 2.38 0.25 18 8.34 5.42 0.65 20 8.70 4.61 0.53 22 9.05 3.71 0.41 24 9.51 2.76 0.29 26 9.80 1.67 0.17 18 8.34 5.
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PERFORMANCE DATA COOL operation at Rated frequency MSZ-GA71VA: MUZ-GA71VA CAPACITY:7.1(kW) INDOOR INDOOR DB(°C) WB(°C) 21 21 22 22 22 23 23 23 24 24 24 24 25 25 25 25 26 26 26 26 26 27 27 27 27 27 28 28 28 28 28 29 29 29 29 29 30 30 30 30 30 31 31 31 31 31 32 32 32 32 32 NOTE 18 20 18 20 22 18 20 22 18 20 22 24 18 20 22 24 18 20 22 24 26 18 20 22 24 26 18 20 22 24 26 18 20 22 24 26 18 20 22 24 26 18 20 22 24 26 18 20 22 24 26 Q 6.96 7.31 6.96 7.31 7.74 6.96 7.31 7.74 6.96 7.31 7.74 8.17 6.96 7.31 7.74 8.
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PERFORMANCE DATA HEAT operation at Rated frequency MSZ-GA50VA : MUZ-GA50VA CAPACITY:5.9(kW) INDOOR DB(°C) 15 21 26 INPUT:1630(W) OUTDOOR WB(°C) -10 -5 0 5 10 15 20 Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT 3.72 1099 4.48 1318 5.25 1487 6.02 1606 6.79 1707 7.49 1758 8.26 1791 3.54 1183 4.25 1403 5.02 1555 5.72 1673 6.49 1758 7.20 1808 7.94 1876 3.19 1268 3.95 1487 4.66 1639 5.43 1758 6.20 1842 6.90 1893 7.67 1944 MSZ-GA60VA : MUZ-GA60VA CAPACITY:6.
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9 ACTUATOR CONTROL MUZ-GA50VA MUZ-GA60VA MUZ-GA71VA 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. 5 seconds ON 15 seconds Compressor OFF ON Outdoor fan OFF 9-2. R.V. COIL CONTROL Heating . . . . . . . . . . . . . . . . . ON Cooling . . . . . . . . . . . . . . . . . OFF Dry . . . . . . . . . . . . . . .
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10 SERVICE FUNCTIONS Contents of “SERVICE FUNCTIONS” have been removed. 11 TROUBLESHOOTING MUZ-GA50VA MUZ-GA60VA MUZ-GA71VA 11-1. CAUTIONS ON TROUBLESHOOTING 1. Before troubleshooting, check the following 1) Check the power supply voltage. 2) Check the indoor/outdoor connecting wire for miswiring. 2.
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11-2. FAILURE MODE RECALL FUNCTION Outline of the function This air conditioner can memorize the abnormal condition which has occurred once. Even though LED indication listed on the troubleshooting check table (11-4.) disappears, the memorized failure details can be recalled. This mode is very useful when the unit needs to be repaired for the abnormality which does not recur. 1.
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2. Flow chart of the detailed outdoor unit failure mode recall function Operational procedure The outdoor unit might be abnormal. Confirm if outdoor unit is abnormal according to the following procedures. Confirm that the remote controller is in the failure mode recall function. With the remote controller headed towards the indoor unit, press TOO COOL or TOO WARM button to adjust the set temperature to 25°C. 1 Does left lamp of OPERATION INDICATOR lamp on the indoor unit blink at the interval of 0.
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3. Outdoor failure mode table The left lamp of OPERATION INDICAOR lamp(Indoor unit) Abnormal point (Failure mode/protection) LED indication Remedy Condition (Outdoor P.C. board) LED 1 LED 2 Lighting Lighting Overcurrent protection stop is • Check the connection continuously performed 3 times within of the compressor 1 minute after the compressor gets connecting wire. started, or when converter protection • Refer to 11-4.
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The left lamp of OPERATION INDICATOR lamp(Indoor unit) 11-time flash Abnormal point (Failure mode/protection) LED indication (Outdoor P.C. board) LED 1 LED 2 Condition Communication error between P.C. boards Lighting 6 times Communication error occurs between the electronic control P.C. board and power board for more than 10 seconds. The communication between boards protection stop is continuously performed twice.
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11-3. INSTRUCTION OF TROUBLESHOOTING If blinking of OPERATION INDICATOR lamp cannot be checked, it can be checked with failure mode recall function. Start Indoor unit Operates. Outdoor unit does not operate. Outdoor unit operates only in Test Run operation. (Refer to 8-3.) Indoor unit operates. Outdoor unit does not operate normally. Outdoor unit does not operate even in Test Run operation. (Refer to 8-3.) Check room temperature thermistor. Refer to "Test point diagram and voltage". Refer to 11-6.
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11-4. TROUBLESHOOTING CHECK TABLE No. Symptom Indication LED1(Red) LED2(Yellow) Condition Abnormal point/Condition Outdoor unit does not operate. Remedy • Check the connection of the compressor connecting wire. • Refer to 11-6. "How to check inverter/compressor". • Check the stop valve.
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No. Symptom Indication LED1(Red) LED2(Yellow) Outdoor unit 20 operates. Once Lighting Twice Lighting 21 Condition Abnormal point/Condition Primary current protection The input current exceeds 15A. Secondary current protection The current of the compressor exceeds 15A. High-pressure protection The indoor gas pipe temperature exceeds 45°C during heating. Defrosting in cooling The indoor gas pipe temperature falls 3°C or below during cooling.
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11-5. TROUBLE CRITERION OF MAIN PARTS MUZ-GA50VA MUZ-GA60VA MUZ-GA71VA Part name Defrost thermistor (RT61) Ambient temperature thermistor (RT65) Check method and criterion Figure Measure the resistance with a tester. Refer to 11-7. “Test point diagram and voltage”, 1. “Outdoor electronic Outdoor heat exchanger control P.C. board”, for the chart of thermistor. temperature thermistor (RT68) Discharge temperature Measure the resistance with a tester.
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11-6. TROUBLESHOOTING FLOW Outdoor unit does not operate. Check of power supply Check the connecting of parts of main power supply circuit. Turn ON power supply. Is there voltage of 230 VAC in the power supply terminal block? No Check the power supply cable. Yes Is the output voltage from the noise filter P.C. board 230 VAC? No Is fuse (F64) blown? No Yes Yes Is the input voltage to the power board 230 VAC? Replace the fuse. No Replace the reactor.
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• When unit cannot operate neither by the remote controller nor by EMERGENCY OPERATION switch. Indoor unit does not operate. • When OPERATION INDICATOR lamp flashes ON and OFF every 0.5-second. Outdoor unit does not operate. B How to check mis-wiring and serial signal error (when outdoor unit does not work) Turn OFF the power supply. Is there rated voltage in the power supply? No Check the power supply. Yes Turn ON the power supply.
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The cooling operation or heating operation does not operate. Check of R.V. coil • When heating operation does not work. 1. Disconnect the lead wire leading to the compressor. 2. 3 minutes after turning ON the power supply, start EMERGENCY OPERATION in HEAT mode. Is there voltage of 230 VAC between pin1 and pin 2 at connector CN912? No Yes Turn OFF power supply of indoor and outdoor unit. Disconnect the connector CN912 in noise filter P. C. board. Is there normal resistance to R.V. coil? No 1.
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• When cooling, heat exchanger of non-operating indoor unit frosts. • When heating, non-operating indoor unit gets warm. Check of LEV Turn ON power supply to the outdoor unit after checking LEV coil is mounted to the LEV body securely. Yes Is "click - click" sound heard? Or, do you feel vibration of the LEV coil with hands? Normal No Yes Disconnect the connector CN795. Is there normal resistance to LEV coil? Replace the outdoor electronic control P.C. board. No Replace the LEV coil.
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• When OPERATION INDICATOR lamp flashes 6-time. • When thermistor is abnormal. Check of outdoor thermistors Disconnect the connector in the outdoor electronic control P.C. board or the outdoor power board No (see below table), and measure the resistance of thermistor. Is the thermistor normal? (Refer to 11-7.1.) Yes Reconnect the connector CN661, CN663 and CN3. 3 minutes after turning ON the power supply, start EMERGENCY OPERATION.
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• When the operation frequency does not go up from lowest frequency. Check of HPS MUZ-GA60VAMUZ-GA71VA E3 1. Disconnect the connector CN681 in the electronic control P.C. board. 2. Check the resistance of HPS 1 minute after the outdoor unit power supply was turned OFF. Infinity Check the resistance between each terminal. Replace HPS. 0Ω Reconnect CN681. Turn ON power supply to the indoor and outdoor unit. 3 minutes later, start EMERGENCY OPERATION.
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J Electromagnetic noise enters into TV sets or radios Is the unit earthed? No Earth the unit. Yes Is the distance between the antennas and the indoor unit within 3m, or is the distance between the antennas and the outdoor unit within 3m? Yes Extend the distance between the antennas and the indoor unit, and/or the antennas and the outdoor unit.
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11-7. TEST POINT DIAGRAM AND VOLTAGE 1. Outdoor electronic control P.C.
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2. Noise filter P.C. board MUZ-GA50VA MUZ-GA60VA MUZ-GA71VA CN901 To electronic CN902 CN903 control To power To power P.C. board board board { { 230 VAC Input { { CN912 R.V.
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3. Outdoor power board MUZ-GA50VA MUZ-GA60VA MUZ-GA71VA Connect to the compressor Voltage among phases: 5 V to 180 V 325-370 VDC Output (Red) (+) 1 Connect to the earth CN2 Connect to the controller board (+)1-5(–): Signal transmission (To electronic control P.C. board) 5 VDC pulse wave (+)2-5(–): Zero cross signal 3-4 : Not used (+)6-5(–): 15 V (+)7-5(–): 15 V (–) 3 (White) CN3 Fin temperature thermistor RT64 reception (From ) Signal electronic control P.C.
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12 DISASSEMBLY INSTRUCTIONS <"Terminal with locking mechanism" Detaching points> The terminal which has the locking mechanism can be detached as shown below. There are two types ( Refer to (1) and (2)) of the terminal with locking mechanism. The terminal without locking mechanism can be detached by pulling it out. Check the shape of the terminal before detaching. (1) Slide the sleeve and check if there is a locking lever or not. (2) The terminal with this connector has the locking mechanism.
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OPERATING PROCEDURE PHOTOS 2. Removing the inverter assembly, inverter P.C. board and power board (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;
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OPERATING PROCEDURE PHOTOS 4. Removing the defrost thermistor, discharge temperature thermistor, outdoor heat exchanger temperature thermistor and ambient temperature 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;
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OPERATING PROCEDURE PHOTOS 6. Removing the compressor and 4-way valve (1) Remove the top panel, cabinet and service panel. (Refer to 1.) (2) Remove the back panel. (Refer to 1.) (3) Remove the inverter assembly. (Refer to 2.) (4) Recover gas from the refrigerant circuit. NOTE: Recover gas from 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.
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13 PARTS LIST (non-RoHS compliant) MUZ-GA50VA MUZ-GA60VA MUZ-GA71VA 13-1. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS 27 26 31 30 29 28 25 24 1 23 2 22 3 21 4 5 6 20 7 18 17 16 8 14 9 10 11 13-2.
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PARTS LIST (non-RoHS compliant) MUZ-GA50VA MUZ-GA60VA MUZ-GA71VA 13-1. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS Part number that is circled is not shown in the illustration. No. 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 Part No.
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14 RoHS PARTS LIST (RoHS compliant) MUZ-GA50VA MUZ-GA60VA MUZ-GA71VA 14-1.
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RoHS PARTS LIST (RoHS compliant) MUZ-GA50VA MUZ-GA60VA MUZ-GA71VA 14-1. OUTDOOR UNIT STRUCTURAL PARTS, ELECTRICAL PARTS AND FUNCTIONAL PARTS No. RoHS Part number that is circled is not shown in the illustration. 1 G G 2 G 3 G 4 G G 5 G 6 G 7 G 8 G 9 G G 10 G G G 11 G G G 12 G G 13 G G 14 G 15 G 16 G G 17 G G 18 G 19 G 20 G G G 21 G G 22 G 23 G 24 G 25 G 26 G 27 G G 28 G 29 G 30 G 31 G G 32 G G Part No.
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RoHS PARTS LIST (RoHS compliant) No. RoHS MUZ-GA50VA MUZ-GA60VA MUZ-GA71VA 14-2. ACCESSORY Part No. 1 Part Name 2 Q'ty/unit Symbol in Wiring MUZ-GA50 MUZ-GA60 MUZ-GA71 VA - E1 VA VA Diagram 1 G E12 817 704 DRAIN SOCKET 2 G E12 444 705 DRAIN CAP 1 2 E1 E2 E3 E1 E2 1 2 1 2 1 2 1 2 1 2 Remarks Ø33 HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN Copyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO., LTD Distributed in Jun. 2011. No.