Mitsubishi MUX-2A28VB Service Manual Download Page 1 | Manualshive

Page: 1 / 72

Mitsubishi MUX-2A28VB Service Manual Download Page 1

SERVICE MANUAL

CONTENTS

1. TECHNICAL CHANGES ····································2
2. PART NAMES AND FUNCTIONS······················6
3. INDOOR / OUTDOOR

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

10. ACTUATOR CONTROL····································55
11. TROUBLESHOOTING ······································56
12. DISASSEMBLY INSTRUCTIONS·····················63
13. PARTS LIST······················································68

Multi system type
Models

MUX-2A28VB -
MUX-2A59VB -
MUX-3A60VB -
MUX-3A63VB -
MUX-2A70VB -
MUX-4A73VB -

E1

E1

E1

E1

E1

E1

MUX-2A59VB -
MUX-3A60VB -
MUX-3A63VB -
MUX-2A70VB -

E1

E1

E1

E1

HFC

utilized

R410A

SPLIT-TYPE, AIR CONDITIONER

Indication of
model name

NOTE:
•As for indoor unit MSC-CA20VB -

, MSC-CA25VB -

or MSC-CA35VB -

, refer to the service manual OB393.

•This manual describes technical data of outdoor unit.
•As for indoor unit MSC-GA20VB -

, MSC-GA25VB -

or MSC-GA35VB -

, refer to the service manual OB385.

E1

E1

E1

E1

E1

E1

No. OB384

OB384--1.qxp 05.1.17 13:08 Page 1

1
2
3
...
»

Summary of Contents for MUX-2A28VB

Page 1: ...TRUCTIONS 63 13 PARTS LIST 68 Multi system type Models MUX 2A28VB MUX 2A59VB MUX 3A60VB MUX 3A63VB MUX 2A70VB MUX 4A73VB E1 E1 E1 E1 E1 E1 MUX 2A59VB MUX 3A60VB MUX 3A63VB MUX 2A70VB E1 E1 E1 E1 HFC u...

Page 2: ...ndication 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...

Page 3: ...of R22 some special tools and piping parts materials are required Refer to the table below 2 Take sufficient care not to allow water and other contaminations to enter the R410A refrigerant during stor...

Page 4: ...a charging cylinder because the refrigerant bubbles due to high pressure and high speed vaporization No No No Yes Yes New New New Gauge manifold Charge hose Torque wrench Flare tool Flare gauge Vacuum...

Page 5: ...oor unit to the flare and the union seat surfaces 4 Air purge Do not discharge the refrigerant into the atmosphere Take care not to discharge refrigerant into the atmosphere during installation reinst...

Page 6: ...nectable indoor units A MSC CA35VB E1 or MSC GA35VB E1 B MSC CA20VB E1 or MSC GA20VB E1 A MSC CA25VB E1 B or C MSC GA25VB E1 A B A B A MSC CA35VB E1 or MSC GA35VB E1 B MSC CA20VB E1 or C MSC GA20VB E1...

Page 7: ...3 20 725 98 5 2 91 3 16 Single A 3 5 1 4 5 73 1 280 97 1 5 16 2 65 Double A B 3 5 2 4 1 4 0 9 8 96 2 005 97 3 8 39 2 84 Double A B 1 4O2 0 2O2 3 25 730 97 7 2 96 3 50 MUX 2A59VB E1 Cooling Single phas...

Page 8: ...650 MC2 800 RA6V60 GA WHT BLK 90 BLK RED 146 840O640O330 65 52 730 1 0 80 Room A 1 00 Room B C MC1 350 NEO22 MC2 350 NEO22 MUX 3A60VB E1 Cooling Compressor Electrical data Fan motor Special remarks C...

Page 9: ...0 RA6V60 GA WHT BLK 90 BLK RED 146 840O640O330 67 52 730 1 0 85 Room A 0 85 Room B C MC1 620 NEO22 MC2 350 NEO22 MUX 3A63VB E1 Compressor Electrical data Fan motor Special remarks Capacity Coefficient...

Page 10: ...apacity Coefficient of performance C O P Outdoor unit power supply Indoor unit No MUX 2A70VB E1 Cooling Single phase 230V 50Hz 2 460 20 54 0 57 MC1 RN145VHSHT MC2 RN145VHSHT MC1 1 000 MC2 1 000 RA6V60...

Page 11: ...2 800 RA6V60 FA WHT BLK 79 BLK RED 80 840O850O330 76 52 730 1 1 05 Room A B 1 05 Room C D MC1 620 NEO22 MC2 350 NEO22 Single A or B 3 4 1 2 5 28 1 180 97 2 4 75 2 79 Single C or D 2 75 1 1 4 54 1 015...

Page 12: ...PROXIMATE TERESHOLD OF HEARING FOR CONTINUOUS NOISE NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 OCTAVE BAND SOUND PRESSURE LEVEL dB re 0 0002 MICRO BAR BAND CENTER FREQUENCIES Hz Test conditions Cooling DB35...

Page 13: ...TDOOR UNIT Unit mm MUX 2A59VB E1 500 840 61 264 1 0 1 0 Service panel Open as a rule 500mm or more if the front and both sides are open 100mm or more 200mm or more if there are obstacles to both sides...

Page 14: ...35 65 121 40 438 Air in Air out Air in 273 100 125 320 30 330 640 360 76 50 505050 50 Drainage 3 holes 33 C UNIT 34 Unit mm MUX 2A70VB E1 500 840 61 264 1 0 1 0 Service panel Open as a rule 500mm or...

Page 15: ...oint Refrigerant pipe flared 6 35 Gas refrigerant pipe joint Refrigerant pipe flared 9 52 Gas refrigerant pipe joint Refrigerant pipe flared 9 52 Open as a rule 500mm or more if the front and both sid...

Page 16: ...BLU BLU 1 2 BLU BLU BLU BLU BLU 1 2 21R2 21R1 BLU BLU BLU SYMBOL 21R1 21R2 52C SYMBOL MF TB1 TB2 TB3 X1 X2 21R SYMBOL C1 C2 DSAR F61 F62 MC NAME NAME NAME COMPRESSOR CAPACITOR OUTDOOR FAN CAPACITOR SU...

Page 17: ...1 X521 X522 SYMBOL MC1 MC2 MF61 NR61 SR861 SYMBOL C1 C2 C61 DSAR F61 NAME NAME NAME COMPRESSOR CAPACITOR MC1 COMPRESSOR CAPACITOR MC2 OUTDOOR FAN CAPACITOR SURGE ABSORBER FUSE 3 15A COMPRESSOR INNER P...

Page 18: ...IT SYMBOL MF61 NR61 SR861 SR863 SR865 SR866 TB1 SYMBOL C1 C2 C61 DSAR F61 MC1 MC2 NAME NAME NAME COMPRESSOR CAPACITOR MC1 COMPRESSOR CAPACITOR MC2 OUTDOOR FAN CAPACITOR SURGE ABSORBER FUSE 3 15A COMPR...

Page 19: ...IT SYMBOL MF61 NR61 SR861 SR863 SR865 SR866 TB1 SYMBOL C1 C2 C61 DSAR F61 MC1 MC2 NAME NAME NAME COMPRESSOR CAPACITOR MC1 COMPRESSOR CAPACITOR MC2 OUTDOOR FAN CAPACITOR SURGE ABSORBER FUSE 3 15A COMPR...

Page 20: ...B BRN SYMBOL SR861 SR863 SR864 SR865 SR866 SR867 SR868 TB1 TB4 T61 SYMBOL C1 C2 C61 DSAR F61 MC1 MC2 MF61 NR61 NAME NAME NAME COMPRESSOR CAPACITOR MC1 COMPRESSOR CAPACITOR MC2 OUTDOOR FAN CAPACITOR SU...

Page 21: ...frigerant flow in cooling Stop valve with service port Stop valve Stop valve 3 0 x 1 6 x 900 3 0 x 1 4 x 400 3 0 x 1 4 x 400 Strainer 100 OUTDOOR UNIT INDOOR UNIT MAX REFRIGERANT PIPING LENGTH MAX HEI...

Page 22: ...nnection Flared connection Stop valve with service port Stop valve Stop valve with service port Capillary tube Capillary tube Muffler Muffler Strainer 100 Compressor A Compressor B Refrigerant flow in...

Page 23: ...H 10m 10m No of bends 10 10 PIPING PREPARATION 1Table below shows the specifications of pipes commercially available 2Ensure that the 2 refrigerant pipes are well insulated to prevent condensation 3R...

Page 24: ...Stop valve with service port Capillary tube Capillary tube Capillary tube Capillary tube Capillary tube Compressor A Compressor B C Refrigerant flow in cooling UNIT C Indoor heat exchanger Indoor coil...

Page 25: ...Max limits UNIT No A B C Pipe length 15m 15m Total 30m LB LC 15m LA LB LC Height difference H 10m 10m 10m No of bends 10 10 Total 15 10 PIPING PREPARATION 1Table below shows the specifications of pip...

Page 26: ...Stop valve with service port Capillary tube Capillary tube Capillary tube Capillary tube Capillary tube Compressor A Compressor B C Refrigerant flow in cooling UNIT C Indoor heat exchanger Indoor coi...

Page 27: ...ted to prevent condensation 3Refrigerant bending radius must be 100mm or more Unit A 7m 0 8m 20 9m 40 10m 60 11m 80 12m 100 13m 120 14m 140 15m 160 10 m 11 m 12 m 13 m 14 m 15 m 16 m 17 m 18 m 19 m 20...

Page 28: ...onnection With insulation Refrigerant pipe 6 35 With insulation Refrigerant pipe 6 35 Flared connection Stop valve with service port Stop valve Stop valve with service port Capillary tube Capillary tu...

Page 29: ...ping length one way 7m 0 8m 20 9m 40 10m 60 11m 80 12m 100 13m 120 14m 140 15m 160 ADDITIONAL REFRIGERANT CHARGE R410A g PIPING PREPARATION 1Table below shows the specifications of pipes commercially...

Page 30: ...coil thermistor RT12 Room temperature thermistor RT11 With insulation Refrigerant pipe 9 52 With insulation Refrigerant pipe 9 52 With insulation Refrigerant pipe 9 52 With insulation Refrigerant pip...

Page 31: ...1050g 1050g Refrigerant piping length one way 2 unit total 10 m 11 m 12 m 13 m 14 m 15 m 16 m 17 m 18 m 19 m 20 m 21 m 22 m 23 m 24 m 25 m 26 m 27 m 28 m 29 m 30 m 0 10 20 30 40 50 60 70 80 90 100 110...

Page 32: ...r wet dry bulb temperature for your reference at ser vice MUX 2A28VB MUX 3A63VB MUX 2A59VB MUX 2A70VB MUX 3A60VB MUX 4A73VB E1 E1 E1 E1 E1 E1 How to measure the indoor air wet bulb dry bulb temperatur...

Page 33: ...30 70 C C 70 Dry bulb temperature Relative humidity 50 60 20 25 30 9 2 OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT COOL operation Both indoor and outdoor unit are under same temperature humidity con...

Page 34: ...A 2 0 3 0 4 0 5 0 230V 230V 230V 230V kgf F Gauge MPa Gauge 1 1 1 0 0 9 0 8 0 7 0 6 Outdoor low pressure kgf F Gauge 10 9 8 7 6 11 kgf F Gauge MPa Gauge Ambient temperature C Ambient humidity 20 50 2...

Page 35: ...17 1 01 0 32 790 3 07 0 98 0 32 813 28 18 2 82 2 37 0 84 608 2 70 2 27 0 84 638 2 59 2 18 0 84 669 2 50 2 10 0 84 699 28 20 2 94 2 12 0 72 638 2 82 2 03 0 72 676 2 74 1 97 0 72 692 2 64 1 90 0 72 722...

Page 36: ...6 27 22 2 62 1 46 0 56 806 2 45 1 37 0 56 851 2 36 1 32 0 56 866 27 24 2 76 1 21 0 44 836 2 59 1 14 0 44 874 2 52 1 11 0 44 893 27 26 2 90 0 93 0 32 866 2 74 0 88 0 32 904 2 65 0 85 0 32 923 28 18 2 3...

Page 37: ...8 3 17 1 01 0 32 853 3 07 0 98 0 32 877 28 18 2 82 2 37 0 84 656 2 70 2 27 0 84 689 2 59 2 18 0 84 722 2 50 2 10 0 84 754 28 20 2 94 2 12 0 72 689 2 82 2 03 0 72 730 2 74 1 97 0 72 746 2 64 1 90 0 72...

Page 38: ...5 2 74 0 88 0 32 976 2 65 0 85 0 32 996 28 18 2 35 1 98 0 84 804 2 16 1 81 0 84 853 2 08 1 74 0 84 869 28 20 2 47 1 78 0 72 836 2 30 1 66 0 72 877 2 22 1 60 0 72 902 28 22 2 62 1 57 0 60 869 2 45 1 47...

Page 39: ...3 4 62 1 42 0 31 1373 4 48 1 38 0 31 1412 28 18 4 11 3 40 0 83 1056 3 94 3 26 0 83 1109 3 78 3 13 0 83 1162 3 64 3 01 0 83 1214 28 20 4 29 3 03 0 71 1109 4 11 2 91 0 71 1175 3 99 2 82 0 71 1201 3 85 2...

Page 40: ...3 99 1 22 0 31 1571 3 87 1 19 0 31 1604 28 18 3 43 2 84 0 83 1294 3 15 2 61 0 83 1373 3 03 2 50 0 83 1399 28 20 3 61 2 55 0 71 1346 3 36 2 38 0 71 1412 3 24 2 29 0 71 1452 28 22 3 82 2 24 0 59 1399 3...

Page 41: ...9 3 43 1 13 0 33 884 3 33 1 10 0 33 910 28 18 3 06 2 60 0 85 680 2 93 2 49 0 85 714 2 81 2 39 0 85 748 2 70 2 30 0 85 782 28 20 3 19 2 33 0 73 714 3 06 2 23 0 73 757 2 96 2 16 0 73 774 2 86 2 09 0 73...

Page 42: ...6 0 98 0 33 1012 2 87 0 95 0 33 1033 28 18 2 55 2 17 0 85 833 2 34 1 99 0 85 884 2 25 1 91 0 85 901 28 20 2 68 1 95 0 73 867 2 50 1 82 0 73 910 2 41 1 76 0 73 935 28 22 2 83 1 73 0 61 901 2 65 1 62 0...

Page 43: ...34 1 78 0 53 1099 27 24 3 89 1 60 0 41 1010 3 74 1 55 0 41 1066 3 65 1 51 0 41 1099 3 54 1 46 0 41 1154 27 26 4 00 1 17 0 29 1066 3 89 1 14 0 29 1121 3 83 1 12 0 29 1154 3 71 1 09 0 29 1188 28 18 3 41...

Page 44: ...22 3 16 1 68 0 53 1177 2 96 1 58 0 53 1243 2 86 1 52 0 53 1265 27 24 3 34 1 38 0 41 1221 3 13 1 29 0 41 1277 3 05 1 26 0 41 1304 27 26 3 51 1 03 0 29 1265 3 31 0 97 0 29 1321 3 20 0 94 0 29 1349 28 18...

Page 45: ...254 4 03 2 20 0 55 1307 27 24 4 69 2 00 0 43 1201 4 52 1 93 0 43 1267 4 41 1 88 0 43 1307 4 27 1 82 0 43 1373 27 26 4 83 1 48 0 31 1267 4 69 1 44 0 31 1333 4 62 1 42 0 31 1373 4 48 1 38 0 31 1412 28 1...

Page 46: ...22 3 82 2 09 0 55 1399 3 57 1 95 0 55 1478 3 45 1 89 0 55 1505 27 24 4 03 1 72 0 43 1452 3 78 1 61 0 43 1518 3 68 1 57 0 43 1551 27 26 4 24 1 30 0 31 1505 3 99 1 22 0 31 1571 3 87 1 19 0 31 1604 28 18...

Page 47: ...1 61 0 56 808 2 76 1 55 0 56 842 27 24 3 22 1 42 0 44 774 3 10 1 36 0 44 816 3 02 1 33 0 44 842 2 93 1 29 0 44 884 27 26 3 31 1 06 0 32 816 3 22 1 03 0 32 859 3 17 1 01 0 32 884 3 07 0 98 0 32 910 28...

Page 48: ...35 27 22 2 62 1 46 0 56 901 2 45 1 37 0 56 952 2 36 1 32 0 56 969 27 24 2 76 1 21 0 44 935 2 59 1 14 0 44 978 2 52 1 11 0 44 999 27 26 2 90 0 93 0 32 969 2 74 0 88 0 32 1012 2 65 0 85 0 32 1033 28 18...

Page 49: ...62 1 42 0 31 1394 4 48 1 38 0 31 1434 28 18 4 11 3 40 0 83 1072 3 94 3 26 0 83 1126 3 78 3 13 0 83 1179 3 64 3 01 0 83 1233 28 20 4 29 3 03 0 71 1126 4 11 2 91 0 71 1193 3 99 2 82 0 71 1219 3 85 2 72...

Page 50: ...99 1 22 0 31 1595 3 87 1 19 0 31 1628 28 18 3 43 2 84 0 83 1313 3 15 2 61 0 83 1394 3 03 2 50 0 83 1420 28 20 3 61 2 55 0 71 1367 3 36 2 38 0 71 1434 3 24 2 29 0 71 1474 28 22 3 82 2 24 0 59 1420 3 57...

Page 51: ...1 0 31 1092 3 52 1 07 0 31 1124 28 18 3 23 2 67 0 83 840 3 09 2 55 0 83 882 2 97 2 45 0 83 924 2 86 2 36 0 83 966 28 20 3 37 2 37 0 71 882 3 23 2 28 0 71 935 3 14 2 21 0 71 956 3 03 2 13 0 71 998 28 2...

Page 52: ...0 83 1029 2 48 2 04 0 83 1092 2 38 1 96 0 83 1113 28 20 2 83 2 00 0 71 1071 2 64 1 86 0 71 1124 2 54 1 79 0 71 1155 28 22 3 00 1 75 0 59 1113 2 81 1 64 0 59 1176 2 71 1 58 0 59 1197 28 24 3 16 1 47 0...

Page 53: ...4 49 1 58 0 35 1269 4 35 1 54 0 35 1305 28 18 4 00 3 49 0 87 976 3 83 3 34 0 87 1025 3 67 3 21 0 87 1074 3 54 3 09 0 87 1122 28 20 4 17 3 14 0 75 1025 4 00 3 01 0 75 1086 3 88 2 92 0 75 1110 3 74 2 8...

Page 54: ...3 88 1 37 0 35 1452 3 76 1 33 0 35 1482 28 18 3 33 2 91 0 87 1196 3 06 2 67 0 87 1269 2 94 2 57 0 87 1293 28 20 3 50 2 64 0 75 1244 3 26 2 46 0 75 1305 3 15 2 37 0 75 1342 28 22 3 71 2 35 0 63 1293 3...

Page 55: ...ON OPEN OFF CLOSE ON CLOSE OFF OPEN SOLENOID VALVE INDOOR UNIT MC1 MC2 MF61 21R3 21R4 21RB COMPRE SSOR OUTDOOR FAN MOTOR A ON OFF OFF B ON ON OFF OFF ANY UNIT ON OFF ON OFF ON ON OFF OFF C ON OFF ON O...

Page 56: ...rol P C board 3 When removing the electrical parts be careful to the residual voltage of smoothing capacitor 4 When removing the electronic control P C board hold the edge of the board with care NOT t...

Page 57: ...Check of remote controller and receiver P C board Flash on and off at 0 5 second intervals Cause Wrong setting of switch SW2 2 on the electronic control P C board 2 time flash Cause Indoor unit Troubl...

Page 58: ...resistance between the terminals with a tester Coil wiring temperature 10 C 40 C Compressor MC MC1 MC2 INNER PROTECTOR 150 C OPEN 90 C CLOSE Check method and criterion Figure MUX 2A28VB MUX 2A59VB MUX...

Page 59: ...t No Short both terminal of fuse F61 Yes Is the resistance 0 between the fuse F61 and the terminal of CN903 Replace the outdoor control P C board Yes Replace the fuse F61 No No Check the indoor unit Y...

Page 60: ...MU MUX TYPE MUH MXZ TYPE SWITCH OVER Start Turn OFF the power supply indoor outdoor unit Set switch SW2 2 on the indoor electronic control P C board to MUX type w1 Does the unit operate OK Yes No Refe...

Page 61: ...A63 4A73VB If the pipe of indoor unit that does not operate is cooled though the combination of pipe and connecting wire is correct check the solenoid coil Refer to 7 WIRING DIAGRAM Turn OFF the power...

Page 62: ...t 230V AC To terminal block To terminal block To compressor MC1 To fan motor To fan capacitor To indoor unit A Solenoid coil 21R1 To indoor unit B Solenoid coil 21R2 To solenoid coil 21RB To solenoid...

Page 63: ...eve Locking lever 12 1 MUX 2A28VB OUTDOOR UNIT E1 OPERATING PROCEDURE PHOTOS 1 Removing the cabinet 1 Remove the screws of the top panel 2 Remove the screw of the service panel 3 Remove the screws of...

Page 64: ...the cut on the shaft and the mark on the propeller 4 Remove lead clamps and disconnect the outdoor fan motor connector 5 Remove screws fixing the fan motor 6 Remove the outdoor fan motor 4 Removing th...

Page 65: ...Remove the screws of the top panel 3 Remove the service panel 4 Remove the top panel 5 Remove the screws of the front panel 6 Remove the front panel 7 Remove the screws of the back panel 8 Remove the...

Page 66: ...align the mark on the propeller and the motor shaft cut section Set the propeller in position by using the cut on the shaft and the mark on the propeller 4 Removing the outdoor fan motor 1 Remove the...

Page 67: ...e compressor 10 Remove the compressor 6 Removing the compressor C 1 Remove the cabinet Refer to 1 2 Remove the relay panel Refer to 2 3 Remove the screws fixing back panel 4 Remove the back panel 5 Re...

Page 68: ...55 492 E02 759 492 E02 024 936 E02 289 936 E02 642 936 OUTDOOR HEAT EXCHANGER CABINET GRILLE OUT COMPRESSOR COMPRESSOR RUBBER SET BASE STOP VALVE GAS STOP VALVE LIQUID SERVICE PANEL BACK PANEL MOTOR S...

Page 69: ...CAPACITOR RELAY COMPRESSOR CONTACTOR TERMINAL BLOCK TERMINAL BLOCK SURGE ABSORBER COMPRESSOR CAPACITOR FUSE FUSE HOLDER RA6V33 2 0 440V AC 4P FIGURE A 3P FIGURE B 20 450V AC 250V 2A MF TB3 C2 X1 X2 52...

Page 70: ...70 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 6 17 MUX 2A59VB MUX 3A60VB MUX 2A70VB MUX 4A73VB 13 3 OUTDOOR UNIT STRUCTURAL PARTS E1 E1 E1 E1 18 These figures show MUX 3A60VB...

Page 71: ...1 1 1 2 1 1 1 1 6 1 2 2 1 1 1 MUX 3A60 VB E1 MUX 3A63 VB E1 MUX 2A70 VB E1 MUX 4A73 VB E1 1 1 1 1 1 2 2 2 6 1 2 2 1 1 1 E02 819 297 E02 636 515 E02 726 515 E02 922 630 E02 924 630 E02 925 630 E02 923...

Page 72: ...R CAPACITOR SURGE ABSORBER TERMINAL BLOCK 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 RA6V60 RA6V60 4P FIGURE A 3P FIGURE B 3P 3 0 440V AC 4 0 440V AC 250V 3 15A 20 450V AC 25 450V AC 30 450V AC...

Reviews:

No comments