Table of Contents
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SPLIT-TYPE, AIR CONDITIONER
SERVICE MANUAL
Multi system type
Models
MUX-2A28VB -
MUX-2A59VB -
MUX-3A60VB -
MUX-3A63VB -
MUX-2A70VB -
MUX-4A73VB -
NOTE:
•As for indoor unit MSC-CA20VB -
or MSC-CA35VB -
, refer to the service manual OB393.
E1
•This manual describes technical data of outdoor unit.
•As for indoor unit MSC-GA20VB -
or MSC-GA35VB -
, refer to the service manual OB385.
E1
E1
E1
E1
E1
E1
E1
CONTENTS
MUX-2A59VB -
E1
MUX-3A60VB -
E1
MUX-3A63VB -
E1
MUX-2A70VB -
E1
Indication of
model name
10. ACTUATOR CONTROL····································55
11. TROUBLESHOOTING ······································56
12. DISASSEMBLY INSTRUCTIONS·····················63
, MSC-CA25VB -
E1
E1
13. PARTS LIST······················································68
, MSC-GA25VB -
E1
E1
HFC
utilized
R410A
1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················6
CORRESPONDENCE TABLE ···························6
4. SPECIFICATION·················································7
5. NOISE CRITERIA CURVES ·····························12
6. OUTLINES AND DIMENSIONS ······················ 13
7. WIRING DIAGRAM ··········································16
8. REFRIGERANT SYSTEM DIAGRAM ··············21
9. PERFORMANCE CURVES ······························32
No. OB384
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Troubleshooting
Related Manuals for Mitsubishi MUX-2A28VB
Summary of Contents for Mitsubishi MUX-2A28VB
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Page 1: Table Of Contents
SPLIT-TYPE, AIR CONDITIONER No. OB384 utilized SERVICE MANUAL R410A Multi system type Models MUX-2A28VB - MUX-2A59VB - MUX-3A60VB - MUX-3A63VB - MUX-2A70VB - MUX-4A73VB - CONTENTS MUX-2A59VB - MUX-3A60VB - 1. TECHNICAL CHANGES ····································2 MUX-3A63VB - 2. PART NAMES AND FUNCTIONS······················6 MUX-2A70VB - 3. -
Page 2: Technical Changes
TECHNICAL CHANGES MUX-A10WV- MUX-2A28VB- MUX-A20WV- MUX-3A60VB- 1. Indication of capacity has been changed. (BTU kW) MUX-A19WV- MUX-2A59VB- MUX-A22WV- MUX-3A63VB- MUX-A25WV- MUX-2A70VB- MUX-A26WV- MUX-4A73VB- 1. Indication of capacity has been changed. (BTU kW) 2. Size of stop valve (Gas) has been changed. ([12.7 [9.52) - Page 3 INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT • This room air conditioner adopts HFC refrigerant (R410A) which never destroys the ozone layer. • Pay particular attention to the following points, though the basic installation procedure is same as that for R22 conditioners. 1 As R410A has working pressure approximate 1.6 times as high as that of R22, some special tools and piping parts/ materials are required.
- Page 4 Conversion chart of refrigerant temperature and pressure (MPa [Gauge]) R410A NOTE : The unit of pressure has been changed to MPa on the international system of units(SI unit system). f [Gauge]) The conversion factor is: 1(MPa [Gauge]) =10.2(kgf/f -0.5 -30 -20 -10 1.Tools dedicated for the air conditioner with R410A refrigerant The following tools are required for R410A refrigerant.
- Page 5 2 Flaring work and flare nut Flaring work for R410A pipe differs from that for R22 pipe. For details of flaring work, refer to Installation manual “FLARING WORK”. Dimension of flare nut Pipe diameter R410A 6.35 9.52 3.Refrigerant oil Apply the special refrigeration oil (accessories: packed with indoor unit) to the flare and the union seat surfaces. 4.Air purge •...
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Page 6: Part Names And Functions
(Back and side) Air outlet Air outlet Piping Piping Drainage hose Drainage hose Drain outlet Drain outlet INDOOR / OUTDOOR CORRESPONDENCE TABLE MUX-2A28VB - MUX-2A59VB - MUX-3A60VB - MUX-3A63VB - MUX-2A70VB - MUX-4A73VB - OUTDOOR UNIT MUX-4A73VB- MUX-2A28VB- MUX-2A59VB- MUX-3A60VB-... -
Page 7: Specification
SPECIFICATION NOTE: As for specification of the indoor units, refer to service manual OB393 (MSC-CA20/25/35VA- ) or OB385 (MSC-GA20/25/35VA- Outdoor model MUX-2A28VB - MUX-2A59VB - Cooling Cooling Function Single phase Single phase Outdoor unit power supply 230V,50Hz 230V,50Hz Single Double... - Page 8 NOTE: As for specification of the indoor units, refer to service manual OB393 (MSC-CA20/25/35VA- ) or OB385 (MSC-GA20/25/35VA- Outdoor model MUX-3A60VB - Function Cooling Single phase Outdoor unit power supply 230V,50Hz Double Single Single Double Triple Indoor unit No. A+B or A+C B or C A+B+C 2.6+2.8...
- Page 9 NOTE: As for specification of the indoor units, refer to service manual OB393 (MSC-CA20/25/35VA- ) or OB385 (MSC-GA20/25/35VA- Outdoor model MUX-3A63VB - Cooling Function Single phase Outdoor unit power supply 230V,50Hz Single Single Double Double Triple Indoor unit No. B or C A+B or A+C A+B+C 3.5+2.4...
- Page 10 NOTE: As for specification of the indoor units, refer to service manual OB393 (MSC-CA20/25/35VA- ) or OB385 (MSC-GA20/25/35VA- Outdoor model MUX-2A70VB - Cooling Function Outdoor unit power supply Single phase 230V,50Hz Single Double Indoor unit No. A or B Capacity 3.5O2 Dehumidification 1.4O2...
- Page 11 NOTE: As for specification of the indoor units, refer to service manual OB393 (MSC-CA20/25/35VA- ) or OB385 (MSC-GA20/25/35VA- MUX-4A73VB - Outdoor model Cooling Function Outdoor unit power supply Single phase 230V,50Hz Double Triple Triple Single Single Double Double Four A+C or A+D A+C+D A+B+C Indoor unit No.
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Page 12: Noise Criteria Curves
NOISE CRITERIA CURVES MUX-2A59VB - MUX-2A28VB- SPL(dB LINE FUNCTION SPL(dB LINE FUNCTION MUX-3A60VB - COOL COOL MUX-3A63VB - MUX-2A70VB - Test conditions. Test conditions. Cooling :DB35: WB24: Cooling : DB27: WB19: NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30... -
Page 13: Outlines And Dimensions
OUTLINES AND DIMENSIONS Unit: mm OUTDOOR UNIT REQUIRED SPACE MUX-2A28VB- Air in Air in Drainage 3holes [33 Air out Service panel Liquid refrigerant pipe joint Refrigerant pipe (flared) [6.35 Gas refrigerant pipe joint Refrigerant pipe (flared) [9.52 MUX-2A59VB- Open as a rule... - Page 14 Unit: mm OUTDOOR UNIT Open as a rule MUX-3A60VB- 500mm or more if the front and both MUX-3A63VB- sides are open 100mm or more 200mm or more if 100mm or more Drainage there are obstacles 3 holes {33 Air in on both sides Air in Open as a rule...
- Page 15 Unit: mm OUTDOOR UNIT Open as a rule 500mm or more if MUX-4A73VB- the front and both sides are open Drainage 100mm or more 3 holes Air in 200mm or more if 100mm or more there are obstacles on both sides Air in Air out Open as a rule...
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Page 16: Wiring Diagram
WIRING DIAGRAM MUX-2A28VB - MODEL WIRING DIAGRAM OUTDOOR UNIT POWER SUPPLY ~ / N 230V 50Hz S MC CIRCUIT BREAKER 21R1 TO INDOOR UNIT No.A CONNECTING 21R2 TO INDOOR UNIT No.B CONNECTING SYMBOL NAME SYMBOL NAME SYMBOL NAME COMPRESSOR CAPACITOR... - Page 17 MUX-2A59VB - MUX-2A70VB - MODELS WIRING DIAGRAM OUTDOOR UNIT POWER SUPPLY 230V 50Hz CIRCUIT BREAKER CN90 OUTDOOR CONTROL X521 P.C. BOARD TO INDOOR X522 UNIT A CONNECTING X522 X521 NR61 TO INDOOR UNIT B CONNECTING CN91 2 3 4 MF61 NAME SYMBOL SYMBOL...
- Page 18 MUX-3A60VB - MODEL WIRING DIAGRAM OUTDOOR UNIT...
- Page 19 MUX-3A63VB - MODEL WIRING DIAGRAM OUTDOOR UNIT...
- Page 20 MUX-4A73VB - MODEL WIRING DIAGRAM OUTDOOR UNIT...
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Page 21: Refrigerant System Diagram
MAX. REFRIGERANT PIPING LENGTH & MAX. HEIGHT DIFFERENCE Indoor unit A Indoor unit B Max. length difference Outdoor unit MUX-2A28VB- E1 Additional piping max. length 15m ADDITIONAL REFRIGERANT CHARGE (R410A:g) Refrigerant piping length (one way) Outdoor unit UNIT No. precharged... - Page 22 Unit : mm MUX-2A59VB- INDOOR UNIT OUTDOOR UNIT Room temperature thermistor Refrigerant pipe RT11 [9.52 (With insulation) Indoor Stop valve Muffler heat with service port UNIT A exchanger Flared connection Indoor coil Compressor(A) Stop valve thermistor RT12 Capillary tube Strainer Refrigerant pipe Outdoor [6.35...
- Page 23 MAX.REFRIGERANT PIPING LENGTH & MAX. HEIGHT DIFFERENCE Indoor unit A Indoor unit B Outdoor unit MUX-2A59VB - E1 UNIT No. Pipe length Height difference (H) No. of bends Max. limits ADDITIONAL REFRIGERANT CHARGE (R410A:g) Refrigerant piping length (one way) Outdoor unit precharged unit 1000g...
- Page 24 Unit : mm MUX-3A60VB- INDOOR UNIT OUTDOOR UNIT Room temperature thermistor Refrigerant pipe [9.52 RT11 (With insulation) Indoor Stop valve Muffler heat with service port UNIT A exchanger Flared connection Indoor coil Compressor(A) Stop valve thermistor RT12 Capillary tube Strainer Refrigerant pipe [3.0 x [1.4 x 950 Outdoor...
- Page 25 MAX.REFRIGERANT PIPING LENGTH & MAX. HEIGHT DIFFERENCE Indoor unit C Indoor unit A Indoor unit B Outdoor unit MUX-3A60VB - E1 UNIT No. Pipe length Height difference (H) No. of bends Max. Total Total limits ADDITIONAL REFRIGERANT CHARGE (R410A:g) Refrigerant piping length (one way) Outdoor unit precharged unit...
- Page 26 Unit : mm MUX-3A63VB- INDOOR UNIT OUTDOOR UNIT Room temperature thermistor Refrigerant pipe [9.52 RT11 (With insulation) Indoor Stop valve Muffler heat with service port UNIT A exchanger Flared connection Compressor(A) Indoor coil Stop valve thermistor Strainer #100 RT12 Capillary tube Refrigerant pipe [3.0 x [1.6 x 900 [6.35...
- Page 27 MAX.REFRIGERANT PIPING LENGTH & MAX. HEIGHT DIFFERENCE Indoor unit A Indoor unit B Indoor unit C Outdoor unit MUX-3A63VB - UNIT No. Pipe length Height difference (H) No. of bends Unit A Max. Unit B Total Total limits Unit C ADDITIONAL REFRIGERANT CHARGE (R410A:g) Refrigerant piping length (one way) Outdoor unit...
- Page 28 Unit : mm MUX-2A70VB- INDOOR UNIT OUTDOOR UNIT Room temperature thermistor Refrigerant pipe [9.52 RT11 (With insulation) Indoor Stop valve Muffler heat with service port UNIT A exchanger Flared connection Indoor coil Compressor(A) Stop valve thermistor RT12 Capillary tube Strainer Refrigerant pipe [6.35 [3.0 x [1.4 x 700...
- Page 29 MAX.REFRIGERANT PIPING LENGTH & MAX. HEIGHT DIFFERENCE Indoor unit A Indoor unit B Outdoor unit MUX-2A70VB - E1 UNIT No. Pipe length Height difference (H) No. of bends Max. limits ADDITIONAL REFRIGERANT CHARGE (R410A:g) Refrigerant piping length (one way) Outdoor unit precharged unit 950g...
- Page 30 Unit : mm MUX-4A73VB- INDOOR UNIT OUTDOOR UNIT Room temperature Solenoid thermistor Refrigerant pipe valve RT11 Strainer {9.52 21RA (With insulation) #100 Indoor Capillary tube Stop valve Muffler [3.0 x [1.4 x 1000 heat with service port UNIT A exchanger Flared connection Solenoid valve Indoor coil...
- Page 31 MAX.REFRIGERANT PIPING LENGTH & MAX. HEIGHT DIFFERENCE Indoor unit A Indoor unit B Indoor unit C Indoor unit D Outdoor unit MUX-4A73VB- E1 UNIT No. Pipe length Height difference (H) No. of bends Total Total Max. limits Total Total ADDITIONAL REFRIGERANT CHARGE (R410A:g) Refrigerant piping length (one way, 2 unit total) Outdoor unit UNIT No.
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Page 32: Performance Curves
PERFORMANCE CURVES MUX-2A28VB - MUX-3A63VB - MUX-2A59VB - MUX-2A70VB - MUX-3A60VB - MUX-4A73VB - The standard data contained in these 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 pro- vided to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve. - Page 33 Air flow should be set at MAX. The unit of pressure has been changed to MPa on the international system of units(SI unit system). f [Gauge] ) The conversion factor is : 1(MPa[Gauge]) =10.2(kgf/f MUX-2A28VB- (kgf/F[Gauge])(MPa[Gauge]) Single operation (Unit A or B) 230V 230V (˚C)
- Page 34 MUX-3A60VB- (kgf/F[Gauge])(MPa[Gauge]) Single operation (Unit A) (kgf/F[Gauge])(MPa[Gauge]) Single operation (Unit B or C) 230V 230V 230V 230V (˚C) (˚C) (˚C) (˚C) Ambient temperature(˚C) Ambient temperature(˚C) Ambient temperature(˚C) Ambient temperature(˚C) Ambient humidity(%) Ambient humidity(%) Ambient humidity(%) Ambient humidity(%) MUX-3A63VB- Single operation (Unit A) (kgf/F[Gauge])(MPa[Gauge]) (kgf/F[Gauge])(MPa[Gauge]) Single operation (Unit B or C)
- Page 35 PERFORMANCE DATA COOL operation (230V) MSC-CA20VB - MSC-GA20VB - (Single) : MUX-2A28VB - CAPACITY : 2.4(kW) SHF : 0.74 INPUT : 760(W) DB( : ) OUTDOOR INDOOR INDOOR DB( : ) WB( : ) SHC SHF INPUT SHC SHF INPUT...
- Page 36 PERFORMANCE DATA COOL operation (230V) MSC-CA20VB - MSC-GA20VB - (Single) : MUX-2A28VB - CAPACITY : 2.4(kW) SHF : 0.74 INPUT : 760(W) DB( : ) OUTDOOR INDOOR INDOOR DB( : ) WB( : ) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT 2.35 1.32 0.56...
- Page 37 PERFORMANCE DATA COOL operation (230V) MSC-CA20VB - MSC-GA20VB - (Single : Room B) : MUX-2A59VB - CAPACITY : 2.4(kW) SHF : 0.74 INPUT : 820(W) DB( : ) OUTDOOR INDOOR INDOOR DB( : ) WB( : ) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT...
- Page 38 PERFORMANCE DATA COOL operation (230V) MSC-CA20VB - MSC-GA20VB - (Single : Room B) : MUX-2A59VB - CAPACITY : 2.4(kW) SHF : 0.74 INPUT : 820(W) DB( : ) OUTDOOR INDOOR INDOOR DB( : ) WB( : ) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT 2.35 1.32 0.56...
- Page 39 PERFORMANCE DATA COOL operation (230V) MSC-CA35VB - MSC-GA35VB - (Single : Room A) : MUX-2A59VB - CAPACITY : 3.5(kW) SHF : 0.73 INPUT : 1320(W) DB( : ) OUTDOOR INDOOR INDOOR DB( : ) WB( : ) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT...
- Page 40 PERFORMANCE DATA COOL operation (230V) MSC-CA35VB - MSC-GA35VB - (Single : Room A) : MUX-2A59VB - CAPACITY : 3.5(kW) SHF : 0.73 INPUT : 1320(W) DB( : ) OUTDOOR INDOOR INDOOR DB( : ) WB( : ) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT 3.43 1.88 0.55...
- Page 41 PERFORMANCE DATA COOL operation (230V) MSC-CA25VB - MSC-GA25VB - (Single : Room A) : MUX-3A60VB - CAPACITY : 2.6(kW) SHF : 0.75 INPUT : 850(W) DB( : ) OUTDOOR INDOOR INDOOR DB( : ) WB( : ) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT...
- Page 42 PERFORMANCE DATA COOL operation (230V) MSC-CA25VB - MSC-GA25VB - (Single : Room A) : MUX-3A60VB - CAPACITY : 2.6(kW) SHF : 0.75 INPUT : 850(W) DB( : ) OUTDOOR INDOOR INDOOR DB( : ) WB( : ) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT 2.55 1.45 0.57...
- Page 43 PERFORMANCE DATA COOL operation (230V) MSC-CA25VB - MSC-GA25VB - (Single : Room B) : MUX-3A60VB - CAPACITY : 2.9(kW) SHF : 0.71 INPUT : 1110(W) DB( : ) OUTDOOR INDOOR INDOOR DB( : ) WB( : ) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT...
- Page 44 PERFORMANCE DATA COOL operation (230V) MSC-CA25VB - MSC-GA25VB - (Single : Room B) : MUX-3A60VB - CAPACITY : 2.9(kW) SHF : 0.71 INPUT : 1110(W) DB( : ) OUTDOOR INDOOR INDOOR DB( : ) WB( : ) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT 2.84 1.51 0.53...
- Page 45 PERFORMANCE DATA COOL operation (230V) MSC-CA35VB - MSC-GA35VB - (Single : Room A) : MUX-3A63VB - CAPACITY : 3.5(kW) SHF : 0.73 INPUT : 1320(W) DB( : ) OUTDOOR INDOOR INDOOR DB( : ) WB( : ) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT...
- Page 46 PERFORMANCE DATA COOL operation (230V) MSC-CA35VB - MSC-GA35VB - (Single : Room A) : MUX-3A63VB - CAPACITY : 3.5(kW) SHF : 0.73 INPUT : 1320(W) DB( : ) OUTDOOR INDOOR INDOOR DB( : ) WB( : ) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT 3.43 1.88 0.55...
- Page 47 PERFORMANCE DATA COOL operation (230V) MSC-CA20VB - MSC-GA20VB - (Single : Room B or C) : MUX-3A63VB - CAPACITY : 2.4(kW) SHF : 0.74 INPUT : 850(W) DB( : ) OUTDOOR INDOOR INDOOR DB( : ) WB( : ) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT...
- Page 48 PERFORMANCE DATA COOL operation (230V) MSC-CA20VB - MSC-GA20VB - (Single : Room B or C) : MUX-3A63VB - CAPACITY : 2.4(kW) SHF : 0.74 INPUT : 850(W) DB( : ) OUTDOOR INDOOR INDOOR DB( : ) WB( : ) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT 2.35 1.32 0.56...
- Page 49 PERFORMANCE DATA COOL operation (230V) MSC-CA35VB - MSC-GA35VB - (Single) : MUX-2A70VB - CAPACITY : 3.5(kW) SHF : 0.73 INPUT : 1340(W) DB( : ) OUTDOOR INDOOR INDOOR DB( : ) WB( : ) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT 4.11 2.25 0.55...
- Page 50 PERFORMANCE DATA COOL operation (230V) MSC-CA35VB - MSC-GA35VB - (Single) : MUX-2A70VB - CAPACITY : 3.5(kW) SHF : 0.73 INPUT : 1340(W) DB( : ) OUTDOOR INDOOR INDOOR DB( : ) WB( : ) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT 3.43 1.88 0.55 1313...
- Page 51 PERFORMANCE DATA COOL operation (230V) MSC-CA25VB - MSC-GA25VB - (Single : Room C ) : MUX-4A73VB - CAPACITY : 2.75(kW) SHF :0.73 INPUT : 1050(W) DB( : ) OUTDOOR INDOOR INDOOR DB( : ) WB( : ) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT...
- Page 52 PERFORMANCE DATA COOL operation (230V) MSC-CA25VB - MSC-GA25VB - (Single : Room C) : MUX-4A73VB - CAPACITY : 2.75(kW) SHF : 0.73 INPUT : 1050(W) DB( : ) OUTDOOR INDOOR INDOOR DB( : ) WB( : ) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT 2.70 1.47 0.55...
- Page 53 PERFORMANCE DATA COOL operation (230V) MSC-CA35VB - MSC-GA35VB - (Single : Room A) : MUX-4A73VB - CAPACITY : 3.4(kW) SHF : 0.77 INPUT : 1220(W) DB( : ) OUTDOOR INDOOR INDOOR DB( : ) WB( : ) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT...
- Page 54 PERFORMANCE DATA COOL operation (230V) MSC-CA35VB - MSC-GA35VB - (Single : Room A) : MUX-4A73VB - CAPACITY : 3.4(kW) SHF : 0.77 INPUT : 1220(W) DB( : ) OUTDOOR INDOOR INDOOR DB( : ) WB( : ) SHC SHF INPUT SHC SHF INPUT SHC SHF INPUT 3.33 1.98 0.59...
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Page 55: Actuator Control
ACTUATOR CONTROL OUTDOOR UNIT ACTUATOR CONTROL MUX-2A28VB - MUX-2A59VB - MUX-2A70VB - INDOOR UNIT INDOOR UNIT ACTUATOR ACTUATOR – COMPRE- COMPRE- – SSOR SSOR – – ANY UNIT ON ANY UNIT ON OUTDOOR OUTDOOR MF61 FAN MOTOR FAN MOTOR ON (CLOSE) -
Page 56: Troubleshooting
TROUBLESHOOTING MUX-2A28VB - MUX-3A63VB - MUX-2A59VB - MUX-2A70VB - MUX-3A60VB - MUX-4A73VB - 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 mis-wiring. 2. Take care the following during servicing. - Page 57 11-2. Instruction of troubleshooting Start Indoor unit OPERATION Indoor unit Indoor unit Indoor unit operates. INDICATOR operates. operates. doesn't receive Outdoor unit lamp on the But indoor Outdoor unit the signal from doesn't operate indoor unit is unit doesn't doesn't remote controller.
- Page 58 11-3. Trouble criterion of main parts MUX-2A28VB - MUX-2A59VB - MUX-3A60VB - MUX-3A63VB - MUX-2A70VB - MUX-4A73VB - Figure Part name Check method and criterion Measure the resistance between the terminals with a tester. (Coil wiring temperature-10°C ~ 40°C) Normal...
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Page 59: Troubleshooting Flow
11-4.Troubleshooting flow Compressor and / or outdoor fan doesn’t operate. A A Check of outdoor unit Start Is there 230V AC Check the power supply between L - N on the TB1 and connecting wire. of outdoor unit? Press the EMERGENCY OPERATION switch of all indoor units. - Page 60 Compressor and / or outdoor fan doesn’t stop. B B Check of outdoor unit Start Turn OFF the power supply. After 1 minute, turn ON power supply again. Is there 12V DC between Does compressor or Replace the outdoor 1–2 on the outdoor outdoor fan motor stop? control P.C.
- Page 61 Measure the voltage of solenoid coil's connector that check the solenoid coil. Refer to 7.WIRING DIAGRAM. corresponds to the indoor unit, which is operated. MUX-2A28VB Check wiring of outdoor Is voltage 230V? unit and relay. (Refer to page 16.) Replace the outdoor control P.C.
- Page 62 11-5. Test point diagram and voltage MUX-2A59VB - MUX-3A60VB - MUX-3A63VB - MUX-2A70VB - MUX-4A73VB - Outdoor control P.C. board To indoor unit B Solenoid coil 21R2 To indoor unit D Solenoid coil 21R4 To fan capacitor To indoor unit A To indoor unit C Solenoid coil 21R1 Solenoid coil 21R3...
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Page 63: Disassembly Instructions
2Pull the terminal while pull out the terminal pushing the locking slowly. Locking lever lever. Connector 12-1. MUX-2A28VB - OUTDOOR UNIT OPERATING PROCEDURE PHOTOS 1. Removing the cabinet Photo 1 (1) Remove the screws of the top panel. Screws of the front panel (2) Remove the screw of the service panel. - Page 64 OPERATING PROCEDURE PHOTOS 2. Removing the relay panel Photo 4 (1) Remove the service panel and the cabinet.(Refer to 1.) Screws of (2) Remove the following connectors. Hook the outdoor • Outdoor fan motor fan motor Lead • Solenoid coil (21R, 21R1, 21R2) Lead wire clamp Propeller...
- Page 65 12-2. MUX-2A59VB - MUX-3A60VB - MUX-3A63VB - MUX-2A70VB - MUX-4A73VB - NOTE : These photos are MUX-3A60VB. OUTDOOR UNIT Other models are almost the same as MUX-3A60VB. OPERATING PROCEDURE PHOTOS 1.Removing the cabinet Photo 1 Top panel (1) Remove the screws of the service panel. (2) Remove the screws of the top panel.
- Page 66 OPERATING PROCEDURE PHOTOS 2. Removing the relay panel Photo 4 (1) Remove the cabinet. (Refer to 1.) (2) Disconnect the following connectors. Solenoid coil connector . Outdoor fan motor Screws of the (21RA, 21RB, 21R1, . Only MUX-3A60VB and MUX-3A63VB outdoor fan motor 21R2, 21R3, 21R4) Solenoid coil (21RB, 21R3, 21R4)
- Page 67 OPERATING PROCEDURE PHOTOS 5. Removing the compressor (A, B) Photo 5 (1) Remove the cabinet. (Refer to 1.) (2) Remove the relay panel. (3) Remove the soundproof felt. (4) Remove the terminal cover on the compressor. Terminal cover (5) Disconnect lead wires from the compressor. Suction pipe (6) Recover gas from the refrigerant circuit.
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Page 68: Parts List
PARTS LIST MUX-2A28VB - 13-1. OUTDOOR UNIT STRUCTURAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol Part No. Part name in Wiring Remarks MUX-2A28VB- Diagram E02 755 630 OUTDOOR HEAT EXCHANGER E02 815 232... - Page 69 MUX-2A28VB - 13-2. OUTDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS Q'ty/unit Symbol in Wiring Remarks Part name Part No. MUX-2A28VB- Diagram PROPELLER E02 665 501 OUTDOOR FAN MOTOR RA6V33- E02 677 301 TERMINAL BLOCK E07 056 374 E02 900 351 OUTDOOR FAN CAPACITOR 2.0+ /440V AC...
- Page 70 MUX-2A59VB - MUX-3A60VB - MUX-2A70VB - MUX-4A73VB - 13-3. OUTDOOR UNIT STRUCTURAL PARTS 9 10 These figures show MUX-3A60VB.
- Page 71 13-3. OUTDOOR UNIT STRUCTURAL PARTS Part numbers that are circled are not shown in the illustration. Symbol Q'ty / unit Part Name in Wiring Part No. Remarks MUX-2A59 MUX-3A60 MUX-3A63 MUX-2A70 MUX-4A73 Diagram TOP PANEL E02 819 297 MOTOR SUPPORT E02 636 515 MOTOR SUPPORT E02 726 515...
- Page 72 E02 890 383 SURGE ABSORBER DSAR E07 056 374 TERMINAL BLOCK HEAD OFFICE: MITSUBISHI DENKI BLDG.,2-2-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN C C Copyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD Distributed in Jan. 2005. No.OB384 6 New publication, effective Jan. 2005 Made in Japan...