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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
[Model Name]
SUZ-M25VA
SUZ-M25VA-ET
SUZ-M35VA
SUZ-M35VA-ET
SUZ-M50VA
SUZ-M50VA-ET
SUZ-M60VA
SUZ-M60VA-ET
SUZ-M71VA
SUZ-M71VA-ET
SUZ-M25VA.TH
SUZ-M35VA.TH
[Service Ref.]
SUZ-M25VA.TH
SUZ-M25VAR1.TH
SUZ-M25VAR2.TH
SUZ-M25VA-ET.TH
SUZ-M25VA-ETR2.TH
SUZ-M35VA.TH
SUZ-M35VAR1.TH
SUZ-M35VAR2.TH
SUZ-M35VA-ET.TH
SUZ-M35VA-ETR2.TH
SUZ-M50VA.TH
SUZ-M50VAR1.TH
SUZ-M50VAR2.TH
SUZ-M50VA-ET.TH
SUZ-M50VA-ETR2.TH
SUZ-M60VA.TH
SUZ-M60VAR1.TH
SUZ-M60VAR2.TH
SUZ-M60VA-ET.TH
SUZ-M60VA-ETR2.TH
SUZ-M71VA.TH
SUZ-M71VAR1.TH
SUZ-M71VA-ET.TH
SUZ-M71VA-ETR1.TH
R32
CONTENTS
TECHNICAL CHANGES ........................................ 2
1. COMBINATION OF INDOOR AND OUTDOOR UNITS ..... 2
2. SAFETY PRECAUTION .................................... 3
3. PARTS NAMES AND FUNCTIONS ................. 11
4. SPECIFICATION .............................................. 12
5. NOISE CRITERIA CURVES ............................ 14
6. OUTLINES AND DIMENSIONS ...................... 15
7. WIRING DIAGRAM .......................................... 17
8. REFRIGERANT SYSTEM DIAGRAM ............. 21
9. ACTUATOR CONTROL ................................... 24
10. SERVICE FUNCTIONS .................................... 25
11. TROUBLESHOOTING ..................................... 25
12. DISASSEMBLY PROCEDURE ........................ 42
PARTS CATALOG (OCB684)
January 2020
No. OCH684
REVISED EDITION-C
Revision:
• SUZ-M25VAR2.TH,
SUZ-M35VAR2.TH,
SUZ-M50VAR2.TH,
SUZ-M60VAR2.TH
SUZ-M71VAR1.TH
SUZ-M25VA-ETR2.TH
SUZ-M35VA-ETR2.TH
SUZ-M50VA-ETR2.TH
SUZ-M60VA-ETR2.TH, and
SUZ-M71VA-ETR1.TH
have been added in
REVISED EDITION-C.
OCH684 REVISED EDITION-B
is void.
Note:
•This service manual
describes service data of
the outdoor units only.
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Related Manuals for Mitsubishi Electric Mr.SLIM SUZ-M25VAR1.TH
Summary of Contents for Mitsubishi Electric Mr.SLIM SUZ-M25VAR1.TH
- Page 1 SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS January 2020 No. OCH684 TECHNICAL & SERVICE MANUAL REVISED EDITION-C [Model Name] [Service Ref.] SUZ-M25VA.TH Revision: SUZ-M25VA • SUZ-M25VAR2.TH, SUZ-M25VAR1.TH SUZ-M35VAR2.TH, SUZ-M25VAR2.TH SUZ-M50VAR2.TH, SUZ-M25VA-ET.TH SUZ-M25VA-ET SUZ-M60VAR2.TH SUZ-M25VA-ETR2.TH SUZ-M71VAR1.TH SUZ-M35VA.TH SUZ-M25VA-ETR2.TH SUZ-M35VA SUZ-M35VAR1.TH SUZ-M35VA-ETR2.TH SUZ-M50VA-ETR2.TH SUZ-M35VAR2.TH SUZ-M60VA-ETR2.TH, and SUZ-M35VA-ET.TH SUZ-M35VA-ET...
- Page 2 TECHNICAL CHANGES Service ref. have been changed as follows. SUZ-M25VAR1.TH SUZ-M25VAR2.TH SUZ-M35VAR1.TH SUZ-M35VAR2.TH SUZ-M50VAR1.TH SUZ-M50VAR2.TH SUZ-M60VAR1.TH SUZ-M60VAR2.TH SUZ-M71VA.TH SUZ-M71VAR1.TH SUZ-M25VA-ET.TH SUZ-M25VA-ETR2.TH SUZ-M35VA-ET.TH SUZ-M35VA-ETR2.TH SUZ-M50VA-ET.TH SUZ-M50VA-ETR2.TH SUZ-M60VA-ET.TH SUZ-M60VA-ETR2.TH SUZ-M71VA-ET.TH SUZ-M71VA-ETR1.TH • Connection with SFZ will be added. SUZ-M25VA.TH SUZ-M25VAR1.TH SUZ-M35VA.TH SUZ-M35VAR1.TH SUZ-M50VA.TH SUZ-M50VAR1.TH SUZ-M60VA.TH...
- Page 3 SAFETY PRECAUTION MEANINGS OF SYMBOLS DISPLAYED ON THE UNIT This mark is for R32 refrigerant only. Refrigerant type is written on nameplate of outdoor unit. WARNING Read the OPERATION MANUAL carefully before operation. Service personnel are required to carefully read the OPERATION MANUAL and INSTALLATION MANUAL before operation. Further information is available in the OPERATION MANUAL, INSTALLATION MANUAL, and the like.
- Page 4 [1] Warning for service (1) Do not alter the unit. (2) For installation and relocation work, follow the instructions in the Installation Manual and use tools and pipe components specifically made for use with refrigerant specified in the outdoor unit installation manual. (3) Ask a dealer or an authorized technician to install, relocate and repair the unit.
- Page 5 [2] Cautions for unit using R32 refrigerant Basic work procedures are the same as those for conventional units using refrigerant R410A. However, pay careful attention to the following points. (1) Information on servicing (1-1) Checks on the Area Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure that the risk of ignition is minimized.
- Page 6 (3) Repair to intrinsically Safe Components Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that this will not exceed the permissible voltage and current permitted for the equipment in use. Intrinsically safe components are the only types that can be worked on while live in the presence of a flammable atmos- phere.
- Page 7 b) Isolate system electrically. c) Before attempting the procedure, ensure that: • mechanical handling equipment is available, if required, for handling refrigerant cylinders; • all personal protective equipment is available and being used correctly; • the recovery process is supervised at all times by a competent person; •...
- Page 8 2-4. Minimum installation area If you unavoidably install a unit in a space where all four sides are blocked or there are depressions, confirm that one of these situations (A, B or C) is satisfied. Note: These countermeasures are for keeping safety not for specification guarantee. A) Secure sufficient installation space (minimum installation area Amin).
- Page 9 ■ Indoor units Install in a room with a floor area of Amin or more, corresponding to refrigerant amount M (factory-charged refrig- erant + locally added refrigerant). * For the factory-charged refrigerant amount, refer to the spec nameplate or installation manual. For the amount to be added locally, refer to the installation manual.
- Page 10 Case 3: for floor standing (MFZ-KT) M [kg] Amin [m²] 1.00 1.10 1.20 1.30 1.40 No requirements 1.50 1.60 1.70 1.80 1.84 3.63 1.90 3.75 2.00 3.95 h0 : Refer to indoor unit installation manual. 2.10 4.15 2.20 4.34 Floor standing (MFZ-KT) 2.30 4.54 2.40...
- Page 11 PARTS NAMES AND FUNCTIONS SUZ-M25VA.TH SUZ-M25VAR1.TH Air inlet SUZ-M25VAR2.TH (back and side) SUZ-M25VA-ET.TH SUZ-M25VA-ETR2.TH SUZ-M35VA.TH Piping SUZ-M35VAR1.TH SUZ-M35VAR2.TH Air outlet SUZ-M35VA-ET.TH SUZ-M35VA-ETR2.TH Drain hose Drain outlet SUZ-M50VA.TH Air inlet SUZ-M50VAR1.TH (back and side) SUZ-M50VAR2.TH SUZ-M50VA-ET.TH SUZ-M50VA-ETR2.TH Piping Air outlet Drain hose Drain outlet SUZ-M60VA.TH SUZ-M60VAR1.TH...
- Page 12 SPECIFICATION SUZ-M25VA.TH SUZ-M35VA.TH SUZ-M50VA.TH SUZ-M60VA.TH SUZ-M71VA.TH SUZ-M25VAR1.TH SUZ-M35VAR1.TH SUZ-M50VAR1.TH SUZ-M60VAR1.TH SUZ-M71VAR1.TH SUZ-M25VAR2.TH SUZ-M35VAR2.TH SUZ-M50VAR2.TH SUZ-M60VAR2.TH Service ref. SUZ-M71VA-ET.TH SUZ-M25VA-ET.TH SUZ-M35VA-ET.TH SUZ-M50VA-ET.TH SUZ-M60VA-ET.TH SUZ-M71VA-ETR1.TH SUZ-M25VA-ETR2.TH SUZ-M35VA-ETR2.TH SUZ-M50VA-ETR2.TH SUZ-M60VA-ETR2.TH Power supply Single phase 230 V, 50 Hz Model KVB073FYXMC SVB092FBAMT SVB130FBBMT SVB172FCKMT Output 1,200 Cooling...
- Page 13 Specifications and rating conditions of main electric parts Service ref. SUZ-M25VA.TH SUZ-M35VA.TH SUZ-M50VA.TH SUZ-M60VA.TH SUZ-M71VA.TH Item SUZ-M25VAR1.TH SUZ-M35VAR1.TH SUZ-M50VAR1.TH SUZ-M60VAR1.TH SUZ-M71VAR1.TH SUZ-M25VAR2.TH SUZ-M35VAR2.TH SUZ-M50VAR2.TH SUZ-M60VAR2.TH SUZ-M71VA-ET.TH SUZ-M25VA-ET.TH SUZ-M35VA-ET.TH SUZ-M50VA-ET.TH SUZ-M60VA-ET.TH SUZ-M71VA-ETR1.TH SUZ-M25VA-ETR2.TH SUZ-M35VA-ETR2.TH SUZ-M50VA-ETR2.TH SUZ-M60VA-ETR2.TH (C61) — 620 μF 420 V 620 μF 420 V —...
- Page 14 NOISE CRITERIA CURVES SUZ-M25VA.TH SUZ-M35VA.TH SUZ-M25VAR1.TH SUZ-M35VAR1.TH SUZ-M25VAR2.TH SUZ-M35VAR2.TH SUZ-M25VA-ET.TH SUZ-M35VA-ET.TH SUZ-M25VA-ETR2.TH SUZ-M35VA-ETR2.TH FUNCTION SPL(dB(A)) FAN SPEED LINE FUNCTION SPL(dB(A)) FAN SPEED LINE COOLING COOLING High High Med. Med. HEATING HEATING NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 NC-20 NC-20...
- Page 15 OUTLINES AND DIMENSIONS Unit: mm SUZ-M25VA.TH SUZ-M35VA.TH SUZ-M25VAR1.TH SUZ-M35VAR1.TH SUZ-M25VAR2.TH SUZ-M35VAR2.TH SUZ-M25VA-ET.TH SUZ-M35VA-ET.TH SUZ-M25VA-ETR2.TH SUZ-M35VA-ETR2.TH mm (inch) Unit: mm SUZ-M50VA.TH SUZ-M50VAR1.TH SUZ-M50VAR2.TH SUZ-M50VA-ET.TH SUZ-M50VA-ETR2.TH mm (inch) OCH684C...
- Page 16 SUZ-M60VA.TH SUZ-M71VA.TH SUZ-M60VAR1.TH SUZ-M71VAR1.TH SUZ-M60VAR2.TH SUZ-M71VA-ET.TH Unit: mm SUZ-M60VA-ET.TH SUZ-M71VA-ETR1.TH SUZ-M60VA-ETR2.TH REQUIRED SPACE *1 500 mm or more when front and sides of the unit are clear 417.5 Air in Air in Air out 2-holes 10 21 *2 When any 2 sides of left, right and rear of the unit are clear Service panel Liquid refrigerant pipe joint...
- Page 17 WIRING DIAGRAM SUZ-M25VA.TH SUZ-M25VAR1.TH SUZ-M25VAR2.TH SUZ-M25VA-ET.TH SUZ-M25VA-ETR2.TH OCH684C...
- Page 18 SUZ-M35VA.TH SUZ-M35VAR1.TH SUZ-M35VAR2.TH SUZ-M35VA-ET.TH SUZ-M35VA-ETR2.TH OCH684C...
- Page 19 SUZ-M50VA.TH SUZ-M50VAR1.TH SUZ-M50VAR2.TH SUZ-M50VA-ET.TH SUZ-M50VA-ETR2.TH OCH684C...
- Page 20 SUZ-M60VA.TH SUZ-M71VA.TH SUZ-M60VAR1.TH SUZ-M71VAR1.TH SUZ-M60VAR2.TH SUZ-M71VA-ET.TH SUZ-M60VA-ET.TH SUZ-M71VA-ETR1.TH SUZ-M60VA-ETR2.TH OCH684C...
- Page 21 REFRIGERANT SYSTEM DIAGRAM SUZ-M25VA.TH SUZ-M35VA.TH SUZ-M25VAR1.TH SUZ-M35VAR1.TH SUZ-M25VAR2.TH SUZ-M35VAR2.TH SUZ-M25VA-ET.TH SUZ-M35VA-ET.TH SUZ-M25VA-ETR2.TH SUZ-M35VA-ETR2.TH Unit: mm Refrigerant pipe ø9.52 4-way valve (with heat insulator) Strainer Outdoor heat exchanger Muffler Stop valve temperature (with service port) thermistor Outdoor Muffler RT68 Discharge heat Flared connection temperature exchanger...
- Page 22 SUZ-M60VA.TH SUZ-M71VA.TH SUZ-M60VAR1.TH SUZ-M71VAR1.TH SUZ-M60VAR2.TH SUZ-M71VA-ET.TH SUZ-M60VA-ET.TH SUZ-M71VA-ETR1.TH SUZ-M60VA-ETR2.TH Unit: mm Refrigerant pipe ø 15.88 4-way valve (with heat insulator) Strainer Stop valve Muffler (with service port) Outdoor Defrost Flared connection heat thermistor Ambient Strainer exchanger RT61 temperature #100 thermistor Discharge RT65 temperature...
- Page 23 MAX. REFRIGERANT PIPING LENGTH Refrigerant piping: m Piping size O.D: mm Service ref. Max. Length A Max. Height difference B Liquid SUZ-M25VA(R1/R2).TH SUZ-M25VA-ET(R2).TH 9.52 SUZ-M35VA(R1/R2).TH SUZ-M35VA-ET(R2).TH 6.35 SUZ-M50VA(R1/R2).TH 12.7 SUZ-M50VA-ET(R2).TH SUZ-M60VA(R1/R2).TH SUZ-M60VA-ET(R2).TH 15.88 SUZ-M71VA(R1).TH 9.52 SUZ-M71VA-ET(R1).TH MAX. HEIGHT DIFFERENCE Indoor unit * Max.
- Page 24 ACTUATOR CONTROL SUZ-M25VA.TH SUZ-M35VA.TH SUZ-M50VA.TH SUZ-M25VAR1.TH SUZ-M35VAR1.TH SUZ-M50VAR1.TH SUZ-M25VAR2.TH SUZ-M35VAR2.TH SUZ-M50VAR2.TH SUZ-M25VA-ET.TH SUZ-M35VA-ET.TH SUZ-M50VA-ET.TH SUZ-M25VA-ETR2.TH SUZ-M35VA-ETR2.TH SUZ-M50VA-ETR2.TH SUZ-M60VA.TH SUZ-M71VA.TH SUZ-M60VAR1.TH SUZ-M71VAR1.TH SUZ-M60VAR2.TH SUZ-M71VA-ET.TH SUZ-M60VA-ET.TH SUZ-M71VA-ETR1.TH SUZ-M60VA-ETR2.TH 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.
- Page 25 SERVICE FUNCTIONS SUZ-M25VA.TH SUZ-M35VA.TH SUZ-M50VA.TH SUZ-M25VAR1.TH SUZ-M35VAR1.TH SUZ-M50VAR1.TH SUZ-M25VAR2.TH SUZ-M35VAR2.TH SUZ-M50VAR2.TH SUZ-M25VA-ET.TH SUZ-M35VA-ET.TH SUZ-M50VA-ET.TH SUZ-M25VA-ETR2.TH SUZ-M35VA-ETR2.TH SUZ-M50VA-ETR2.TH SUZ-M60VA.TH SUZ-M71VA.TH SUZ-M60VAR1.TH SUZ-M71VAR1.TH SUZ-M60VAR2.TH SUZ-M71VA-ET.TH SUZ-M60VA-ET.TH SUZ-M71VA-ETR1.TH SUZ-M60VA-ETR2.TH CHANGE IN DEFROST SETTING Changing defrost finish temperature <JS> To change the defrost finish temperature, cut/solder the JS wire of the outdoor inverter P.C. board. (Refer to "11-6-1. Inverter P.C.
- Page 26 11-2. TROUBLESHOOTING CHECK TABLE Abnormal point/ check Symptoms Condition Remedy Condition indication code Overcurrent protection cut-out operates 3 consecutive times • Reconnect connector of compressor. Outdoor unit 1-time blink Outdoor power sys- • Refer to 11-5. "How to check in- does not op- within 1 minute after the compressor gets started.
- Page 27 11-3. HOW TO PROCEED "SELF-DIAGNOSIS" 11-3-1. Self-diagnosis <PAR-4xMAA ("x" represents 0 or later)> Select "Service" from the Main menu, Diagnosis and press the [ ] button. Self check Remote controller check Select "Check" from the Service menu, and press the [ ] button.
- Page 28 11-3-2. Remote controller check <PAR-4xMAA ("x" represents 0 or later)> If operations cannot be completed with the remote controller, diagnose the remote controller with this function. Select "Service" from the Main menu, Diagnosis and press the [ ] button. Self check Remote controller check Select "Check"...
- Page 29 11-3-3. Self-diagnosis <PAC-YT52CRA> Retrieve the error history of each unit using the Simple MA controller. Switch to the self-diagnosis mode. button are pressed for 5 seconds or longer, the figure shown below is When the A button and the displayed. Set the address or refrigerant address No.
- Page 30 11-3-4. Remote Controller Check <PAC-YT52CRA> When the air conditioner cannot be controlled from the Simple MA controller, use this function to check the remote controller. 1 First, check the power mark. When normal voltage (12 V DC) is not applied to the remote controller, the power mark goes off. When the power mark is off, check the remote controller wiring and the indoor unit.
- Page 31 11-3-5. Self-diagnosis <Wireless remote controller> For SLZ model, refer to the indoor unit's service manual. <In the case of trouble during operation, except for SLZ model*> When a malfunction occurs to air conditioner, both indoor unit and outdoor unit will stop and operation lamp blinks to inform unusual stop.
- Page 32 • Refer to the following tables for details on the check codes. [Output pattern A] Beeper sounds Beep Beep Beep Beep Beep Beep Beep OPERATION · · · Repeated INDICATOR lamp blink pattern 0.5 s 0.5 s 0.5 s Approx. 2.5 s Approx.
- Page 33 11-4. TROUBLE CRITERION OF MAIN PARTS SUZ-M25VA.TH SUZ-M35VA.TH SUZ-M50VA.TH SUZ-M25VAR1.TH SUZ-M35VAR1.TH SUZ-M50VAR1.TH SUZ-M25VAR2.TH SUZ-M35VAR2.TH SUZ-M50VAR2.TH SUZ-M25VA-ET.TH SUZ-M35VA-ET.TH SUZ-M50VA-ET.TH SUZ-M25VA-ETR2.TH SUZ-M35VA-ETR2.TH SUZ-M50VA-ETR2.TH SUZ-M60VA.TH SUZ-M71VA.TH SUZ-M60VAR1.TH SUZ-M71VAR1.TH SUZ-M60VAR2.TH SUZ-M71VA-ET.TH SUZ-M60VA-ET.TH SUZ-M71VA-ETR1.TH SUZ-M60VA-ETR2.TH Parts name Check method and criterion Figure Measure the resistance with a tester. Defrost thermistor (RT61) Refer to “11-6.
- Page 34 11-5. TROUBLESHOOTING FLOW A How to check inverter/compressor Disconnect the connector between the compressor and the intelligent power module (IC700) Check the voltage between terminals. See 11-5. “Check of open phase”. Are the voltages balanced? Replace the inverter P.C. board. Check the compressor.
- Page 35 D Check of compressor winding Disconnect the connector between the compressor and the intelligent power module, and measure the resistance between the compressor terminals. <Measurement point> Measure the resistance between the lead wires at 3 points. BK-WH BK-RD WH-RD <Judgement> Refer to "11-4.
- Page 36 G Check of R.V. coil First of all, measure the resistance of R.V. coil to check if the coil is defective. Refer to "11-4. TROUBLE CRITERION OF MAIN PARTS". In case CN721(M25/35/50)/CN602(M60/71) is not connected or R.V. coil is open, voltage is generated between the terminal pins of the connector although any signal is not being transmitted to R.V.
- Page 37 I Check of LEV Start Turn on power supply to the outdoor unit after checking Normal LEV coil is fixed to the LEV body securely. Is "click - click" sound heard? Or, do you feel vibration of the LEV coil with a hand? Disconnect the connector CN724 is there nor- Replace the inverter P.C.
- Page 38 Electromagnetic noise enters into TV sets or radios Is the unit earthed? Earth the unit. Is the distance between the antennas Extend the distance between the antennas and and the indoor unit within 3 m, or is the the indoor unit, and/or the antennas and the distance between the antennas and the outdoor unit.
- Page 39 Check of outdoor refrigerant circuit CAUTION: Has the operation stopped Do not start the operation again to during pump down? prevent hazards. The operation has stopped to prevent the diesel explosion caused by air trapped in the refrigerant circuit. Close the stop valve, and disconnect the power plug or turn the breaker OFF.
- Page 40 11-6. TEST POINT DIAGRAM AND VOLTAGE 11-6-1. Inverter P.C. board SUZ-M25VA.TH SUZ-M35VA.TH SUZ-M50VA.TH SUZ-M25VAR1.TH SUZ-M35VAR1.TH SUZ-M50VAR1.TH SUZ-M25VAR2.TH SUZ-M35VAR2.TH SUZ-M50VAR2.TH SUZ-M25VA-ET.TH SUZ-M35VA-ET.TH SUZ-M50VA-ET.TH SUZ-M25VA-ETR2.TH SUZ-M35VA-ETR2.TH SUZ-M50VA-ETR2.TH R.V.coil Smoothing Smoothing Smoothing Defrost heater (CN721) DB61 capacitor Back side of unit capacitor (C61) capacitor (CN722) 230 V AC...
- Page 41 11-6-2. Inverter P.C. board SUZ-M60VA.TH SUZ-M71VA.TH SUZ-M60VAR1.TH SUZ-M71VAR1.TH SUZ-M60VAR2.TH SUZ-M71VA-ET.TH SUZ-M60VA-ET.TH SUZ-M71VA-ETR1.TH SUZ-M60VA-ETR2.TH Jumper wire for pre-heat control setting (JK) LEV (CN724) Jumper wire for changing defrost setting (JS) Ambient temperature thermistor/RT65 (CN672) Outdoor heat exchanger temperature thermistor R.V. coil (CN602) /RT68 (CN671) 230 V AC Discharge temperature...
- Page 42 DISASSEMBLY PROCEDURE <"Terminal with locking mechanism" Detaching points> The terminal which has the locking mechanism can be detached as shown below. There are 2 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.
- Page 43 OPERATING PROCEDURE PHOTOS/FIGURES 2. Removing the inverter assembly, inverter P.C. board Photo 4 (1) Remove the cabinet and panels. (Refer to section 1.) Screws of the heat sink Screws of the terminal block (2) Disconnect the lead wire to the reactor and the following con- support and the separator support and the back panel nectors:...
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Page 44: Table Of Contents
OPERATING PROCEDURE PHOTOS/FIGURES 5. Removing outdoor fan motor Photo 7 (1) Remove the cabinet and panels. (Refer to section 1.) (2) Disconnect the following connectors: <Inverter P.C. board> Ambient temperature CN931, CN932 (Fan motor) thermistor (3) Remove the propeller fan nut. (4) Remove the propeller fan. - Page 45 SUZ-M50VA.TH SUZ-M50VAR1.TH SUZ-M50VAR2.TH SUZ-M50VA-ET.TH SUZ-M50VA-ETR2.TH NOTE: Turn OFF the power supply before disassembly. OPERATING PROCEDURE PHOTOS/FIGURES 1. Removing the cabinet Photo 1 (1) Remove the screws of the service panel. Screws of the top panel (2) Remove the screws of the top panel. (3) Remove the screw of the valve cover.
- Page 46 OPERATING PROCEDURE PHOTOS/FIGURES 2. Removing the inverter assembly and inverter P.C. Photo 3 Screw of the P.B. support board and the separator Screw of the heat sink (1) Remove the cabinet and panels. (Refer to section 1.) Screws of support and the separator (2) Disconnect the lead wire to the reactor and the following con- the terminal block nectors:...
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Page 47: Removing Outdoor Fan Motor Photo
OPERATING PROCEDURE PHOTOS/FIGURES 3. Removing R. V. coil Photo 6 Screw of the R.V. coil (1) Remove the cabinet and panels. (Refer to section 1.) (2) Disconnect the following connectors: <Inverter P.C. board> CN721 (R.V. coil) (3) Remove the R.V. coil. Discharge temperature thermistor Outdoor heat Photo 7... -
Page 48: Removing The Compressor And 4-Way Valve
OPERATING PROCEDURE PHOTOS/FIGURES 6. Removing the compressor and 4-way valve Photo 9 Discharge pipe (1) Remove the cabinet and panels. (Refer to section 1.) Suction pipe brazed part (2) Remove the inverter assembly. (Refer to section 2.) brazed part (3) Recover gas from the refrigerant circuit. NOTE: Recover gas from the pipes until the pressure gauge shows 0 kg/cm... - Page 49 SUZ-M60VA.TH SUZ-M71VA.TH SUZ-M60VAR1.TH SUZ-M71VAR1.TH SUZ-M60VAR2.TH SUZ-M71VA-ET.TH SUZ-M60VA-ET.TH SUZ-M71VA-ETR1.TH SUZ-M60VA-ETR2.TH NOTE: Turn OFF the power supply before disassembly. OPERATING PROCEDURE PHOTOS/FIGURES 1. Removing the cabinet Photo 1 (1) Remove the screws of the service panel. (2) Remove the screws of the top panel. Screws of the top panel (3) Remove the screw of the valve cover.
- Page 50 OPERATING PROCEDURE PHOTOS/FIGURES 2. Removing the inverter assembly and inverter P.C. Photo 3 Screws of the relay panel Inverter P.C board board (1) Remove the cabinet and the service panel. (Refer to 1.) (2) Disconnect the lead wire to the reactor and the following connectors: <Inverter P.C.
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Page 51: Ambient Temperature Thermistor
OPERATING PROCEDURE PHOTOS/FIGURES Screw of 3. Removing R.V. coil Photo 5 the R.V. coil (1) Remove the cabinet and panels. (Refer to 1.) (2) Disconnect the following connector: <Inverter P.C. board> CN602 (R.V. coil) (3) Remove the R.V. coil. Brazed parts of 4-way valve 4. -
Page 52: Screws Of The Outdoor Fan Motor
OPERATING PROCEDURE PHOTOS/FIGURES 5. Removing outdoor fan motor Photo 7 Propeller fan (1) Remove the top panel, cabinet and service panel. (Refer to 1.) (2) Disconnect the following connectors: <Inverter P.C. board> CN931, CN932 (Fan motor) Propeller fan (3) Remove the propeller fan nut. (4) Remove the propeller fan. - Page 53 OCH684C...
- Page 54 HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN Copyright 2018 MITSUBISHI ELECTRIC CORPORATION Issued: Jan. 2020 No. OCH684 REVISED EDITION-C Issued: Jun. 2019 No. OCH684 REVISED EDITION-B Issued: Jan. 2019 No. OCH684 REVISED EDITION-A Published: Dec. 2018 No. OCH684 Specifications are subject to change without notice.