Mitsubishi Electric MXZ-A18WV Page 71 Service Manual Download

Page: 71 / 85

DISASSEMBLY INSTRUCTIONS

OPERATING PROCEDURE

PHOTOS

1. Removing the cabinet.

1. Removing the cabinet.
(1) Remove the screws of the top panel.
(2) Remove the top panel.
(3) Remove the screw of the service panel.
(4) Remove the service panel.
(5) Remove the screws of the front panel.

13-1. MXZ-A18WV -

OUTDOOR UNIT

Photo 1

2. Removing the inverter assembly

(1) Remove the top panel, service panel and front panel.
(2) Remove indoor/outdoor connecting wire and power supply

cable.

(3) Remove the compressor connector on the compressor side.
(4) Remove the connectors for fan motor, LEV, thermistor and

R.V. coil from the electronic control P.C. board.

(5) Remove the screws of the inverter assembly.
(6) Remove the inverter assembly.

Photo 3

Photo 4

Photo 2

Compressor
connector

Screws of the front panel

Screws of the top panel

Screws of the front panel

Screws of the top panel

Screws of the
front panel

LEV, R.V.coil
and thermistor
connectors

Fan motor
connector

Screw
of the
service
panel

Screw of the relay panel

OB319--3.qxp 03.12.3 0:58 PM Page 71

Summary of Contents for MXZ-A18WV

Page 1: ...71 14 PARTS LIST 78 15 OPTIONAL PARTS 83 Inverter controlled multi system Models MXZ A18WV MXZ A26WV MXZ A32WV E1 E1 E1 No OB319 HFC utilized R410A SPLIT TYPE HEAT PUMP AIR CONDITIONERS MXZ A18WV E1 Indication of model name NOTE The description for MXZ A18WV has been transferred here from service manual OB307 REVISED EDITION A SPECIFICATION PERFORMANCE CURVES and PARTS LIST of MXZ A18WV have been ...

Page 2: ......

Page 3: ...PM8H60 VA 6 Refrigerant has changed R22 R410A 7 Refrigerant system diagram has changed High pressure switch has decreased 2 1 Accumulator has removed Receiver has added MXZ 32SV MXZ A32WV 1 Combinations of connectable indoor units have increased 2 Capacity class of connectable indoor units has become larger 3 Compressor has changed THV247FBA TNB220FMCH 4 Outdoor fan motor has changed RA6V60 BA PM8...

Page 4: ...hat 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 storage and installation since it is more susceptible to contaminations than R22 3 For refrigerant piping use clean pressure proof parts materials specifically designed for R410A Refer to 2 Refrigeran...

Page 5: ...he 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 pump adapter Electronic scale for refrigerant charging No Not Substitutable for R410A Yes Substitutable for R410A No 12 7 mm and 15 88 mm 1 Tools dedicated for the air conditioner with R410A refrigerant The following tools are r...

Page 6: ...cked with indoor 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 reinstallation or repairs to the refrigerant circuit Use the vacuum pump for air purging for the purpose of environmental protection 5 Additional charge For additional charging charge the refri...

Page 7: ...e indoor units 07 07 07 09 07 12 09 09 09 12 12 12 MXZ A18WV E1 OUTDOOR UNIT ACCESSORIES Air outlet Drain outlet Air inlet Back and side MXZ A18WV E1 Drain socket Drain cap 1 2 1 2 MXZ A18WV MXZ A26WV MXZ A32WV E1 E1 E1 INDOOR OUTDOOR CORRESPONDENCE TABLE 3 MXZ A26WV MXZ A32WV E1 E1 Air outlet Drain outlet Air inlet Back and side ...

Page 8: ...4 09 26 12 12 12 18 12 24 12 26 18 18 18 24 18 26 07 07 07 07 07 09 07 07 12 07 07 18 07 07 24 07 07 26 07 09 09 07 09 12 07 09 18 07 09 24 07 09 26 07 12 12 07 12 18 07 12 24 07 12 26 07 18 18 07 18 24 07 18 26 09 09 09 09 09 12 09 09 18 09 09 24 09 09 26 09 12 12 09 12 18 09 12 24 09 12 26 09 18 18 09 18 24 12 12 12 12 12 18 12 12 24 12 12 26 12 18 18 12 18 24 MXZ A26WV E1 ...

Page 9: ...7 18 24 07 18 26 09 09 09 09 09 12 09 09 18 09 09 24 09 09 26 09 12 12 09 12 18 09 12 24 09 12 26 09 18 18 Combination of the connectable indoor units 09 18 24 12 12 12 12 12 18 12 12 24 12 12 26 12 18 18 12 18 24 07 07 07 07 07 07 07 09 07 07 07 12 07 07 07 18 07 07 07 24 07 07 07 26 07 07 09 09 07 07 09 12 07 07 09 18 07 07 09 24 07 07 09 26 07 07 12 12 07 07 12 18 07 07 12 24 07 07 18 18 07 09 ...

Page 10: ...Outdoor unit power consumption kW Current A Power factor 230V NOTE Electrical data is for outdoor unit only MXZ A18WV E1 NOTE Electrical data is for outdoor unit only 07 09 12 07 07 07 09 07 12 09 09 09 12 12 12 90 90 90 90 90 90 90 90 90 4 73 5 14 6 76 9 32 9 37 9 03 9 28 8 91 8 55 3 3 0 9 4 0 3 6 0 9 4 5 4 0 0 9 4 8 6 1 1 53 6 70 6 2 1 53 6 80 6 5 1 55 7 00 6 5 1 55 7 0 6 55 1 56 7 1 6 6 1 58 7 ...

Page 11: ... 5 7 2 2 0 8 5 7 2 2 0 8 5 7 2 2 1 8 5 7 2 2 1 8 5 7 2 2 1 8 5 6 9 2 9 8 1 7 1 2 9 8 5 7 2 2 9 8 5 7 2 2 9 8 5 7 2 2 9 8 5 7 2 2 9 8 5 7 2 2 9 8 5 7 2 2 9 8 5 7 2 2 9 8 5 7 2 2 9 8 5 0 710 0 400 0 920 0 760 0 400 1 010 1 000 0 400 1 290 1 440 0 420 1 630 1 930 0 400 2 130 2 580 0 410 2 710 1 180 0 600 1 600 1 300 0 600 1 770 1 710 0 600 2 200 2 400 0 560 2 710 2 360 0 560 3 050 2 360 0 560 3 200 1...

Page 12: ... 5 7 2 2 9 8 5 7 2 2 9 8 5 7 2 2 9 8 5 7 2 2 9 8 5 7 2 2 9 8 5 7 2 2 9 8 5 7 2 2 9 8 5 7 2 2 9 8 5 7 2 2 9 8 5 7 2 2 9 8 5 7 2 2 9 8 5 7 2 2 9 8 5 7 2 2 9 8 5 2 390 0 680 2 530 2 350 0 690 2 570 2 320 0 700 2 540 2 350 0 680 2 520 2 350 0 680 2 520 2 330 0 680 2 520 2 300 0 660 2 490 2 300 0 660 2 490 2 030 0 690 2 650 2 350 0 690 2 620 2 370 0 700 2 570 2 390 0 680 2 530 2 390 0 680 2 530 2 350 0...

Page 13: ...0 1 8 10 5 9 0 1 9 11 0 9 0 1 9 11 0 9 0 1 9 11 0 8 7 2 6 10 6 8 8 2 6 11 0 9 0 2 6 11 0 9 0 2 6 11 0 9 0 2 6 11 0 9 0 2 6 11 0 9 0 2 6 11 0 9 0 2 6 11 0 9 0 2 6 11 0 9 0 2 6 11 0 1 050 0 340 1 380 1 110 0 340 1 510 1 210 0 330 1 570 2 270 0 330 2 710 2 700 0 330 3 060 3 220 0 360 3 520 2 020 0 480 2 760 2 120 0 480 3 000 2 130 0 480 3 110 2 470 0 460 3 140 2 520 0 460 3 140 2 520 0 460 3 140 2 17...

Page 14: ... 2 6 11 0 9 0 2 6 11 0 9 0 2 7 11 0 9 0 2 7 11 0 9 0 2 7 11 0 9 0 2 7 11 0 9 0 2 7 11 0 9 0 2 6 11 0 9 0 2 7 11 0 9 0 2 7 11 0 9 0 2 7 11 0 9 0 2 7 11 0 9 0 2 7 11 0 2 020 0 510 3 040 2 180 0 530 3 150 1 940 0 510 2 950 1 940 0 510 2 950 1 940 0 510 2 950 1 850 0 490 2 830 1 850 0 490 2 830 1 850 0 490 2 830 2 170 0 530 3 230 2 160 0 530 3 180 2 000 0 510 3 030 2 000 0 510 3 030 2 000 0 510 3 030 ...

Page 15: ... 2 0 8 8 7 85 2 0 8 8 7 95 2 0 8 8 7 9 2 1 8 8 8 0 2 1 8 8 8 0 2 1 8 8 8 0 2 1 8 8 8 0 2 1 8 8 6 9 2 9 8 1 7 1 2 9 8 6 7 7 2 9 9 0 7 85 2 9 9 0 7 95 2 9 9 0 8 0 2 9 9 0 7 3 2 9 8 9 7 75 2 9 9 0 0 710 0 400 0 920 0 760 0 400 1 010 1 000 0 400 1 290 1 440 0 420 1 630 1 930 0 400 2 130 2 580 0 410 2 710 1 180 0 600 1 600 1 300 0 600 1 770 1 710 0 600 2 200 2 480 0 560 2 710 2 750 0 560 3 050 2 810 0 ...

Page 16: ... 9 9 0 8 0 2 9 9 0 8 0 2 9 9 0 8 0 2 9 9 0 8 0 2 9 9 0 7 8 3 7 9 2 7 85 3 7 9 2 7 95 3 7 9 2 8 0 3 7 9 2 8 0 3 7 9 2 8 0 3 7 9 2 7 85 3 7 9 2 2 370 0 700 2 920 2 390 0 680 2 880 2 390 0 680 2 880 2 350 0 690 2 920 2 320 0 700 2 890 2 350 0 680 2 860 2 350 0 680 2 860 2 330 0 680 2 860 2 300 0 660 2 830 2 300 0 660 2 830 2 030 0 690 3 010 2 350 0 690 2 970 2 370 0 700 2 920 2 390 0 680 2 880 2 390 ...

Page 17: ...0 3 7 9 2 8 0 3 7 9 2 8 0 3 7 9 2 7 9 3 7 9 2 8 0 3 7 9 2 8 0 3 7 9 2 8 0 3 7 9 2 8 0 3 7 9 2 8 0 3 7 9 2 8 0 3 7 9 2 8 0 3 7 9 2 2 210 0 810 2 650 2 150 0 790 2 620 2 130 0 770 2 590 2 130 0 770 2 590 2 210 0 810 2 620 2 120 0 790 2 590 2 100 0 770 2 560 2 070 0 770 2 560 2 140 0 810 2 670 2 210 0 810 2 650 2 150 0 790 2 620 2 130 0 770 2 590 2 210 0 810 2 620 2 120 0 790 2 590 2 100 0 770 2 560 ...

Page 18: ... 10 5 9 4 1 8 10 5 9 4 1 9 11 2 9 4 1 9 11 2 9 4 1 9 11 2 9 4 1 9 11 2 9 4 1 9 11 2 8 7 2 6 10 6 8 8 2 6 11 1 9 4 2 6 11 6 9 4 2 6 11 6 9 4 2 6 11 6 9 4 2 6 11 6 8 9 2 6 11 6 9 4 2 6 11 6 1 050 0 340 1 380 1 110 0 340 1 510 1 210 0 330 1 570 2 270 0 330 2 710 2 700 0 330 3 060 3 220 0 360 3 520 2 020 0 480 2 760 2 120 0 480 3 000 2 130 0 480 3 110 2 470 0 460 3 140 2 710 0 460 3 140 2 710 0 460 3 ...

Page 19: ...9 4 2 7 11 6 9 4 2 7 11 6 9 4 2 7 11 6 9 4 2 7 11 6 9 4 3 4 11 6 9 4 3 4 11 6 9 4 3 4 11 6 9 4 3 5 11 6 9 4 3 5 11 6 9 4 3 5 11 6 9 4 3 4 11 6 2 100 0 510 3 330 2 100 0 510 3 330 2 100 0 510 3 330 2 210 0 530 3 400 2 050 0 510 3 230 2 050 0 510 3 230 2 050 0 510 3 230 1 960 0 490 3 100 1 960 0 490 3 100 1 960 0 490 3 100 2 170 0 530 3 420 2 250 0 530 3 410 2 090 0 510 3 320 2 090 0 510 3 320 2 090...

Page 20: ...5 11 6 9 4 3 4 11 6 9 4 3 5 11 6 9 4 3 4 11 6 9 4 3 4 11 6 9 4 3 5 11 6 9 4 3 5 11 6 9 4 3 4 11 6 9 4 3 5 11 6 9 4 3 4 11 6 9 4 3 4 11 6 1 940 0 590 3 390 1 890 0 580 3 270 1 890 0 580 3 270 1 890 0 580 3 270 1 910 0 590 3 340 1 820 0 580 3 220 1 820 0 580 3 220 1 750 0 550 3 130 1 960 0 590 3 390 1 920 0 590 3 370 1 870 0 580 3 230 1 870 0 580 3 230 1 890 0 590 3 320 1 800 0 580 3 200 1 800 0 580...

Page 21: ...k k Compressor Electrical data Fan motor Special remarks Capacity System Coefficient of performance C O P Outdoor unit power supply MXZ A18WV E1 Single phase 230V 50Hz 2 Total capacity 24 Total capacity 24 Max 30 chargeless 20 Max 20 10 10 2 460 20 90 0 8 98 0 57 SNV 092FJYH ROTARY 1 450 U V 2 56 V W 2 56 W U 2 56 RA6V49 AA WHT BLK 139 9 BLK YLW 34 2 BLK RED 205 3 840 69 o640o330 52 725 620 2 1 75...

Page 22: ...0FMCH ROTARY 2 000 U V 1 41 V W 1 41 W U 1 41 PM8H60 UA BLK WHT 15 2 WHT RED 15 2 RED BLK 15 2 900o900o320 35 69 2 3 5 870 NEO22 13 4 at 100 10 0 at 25 10 0 at 25 10 0 at 25 10 0 at 25 10 0 at 25 10 0 at 25 10 0 at 25 17 0 at 50 Cooling 7 2 2 9 8 5 2 530 9 18 2 090 720 2 560 8 98 3 44 46 44 550 490 Heating 9 0 2 6 11 0 2 630 9 44 2 150 530 3 050 9 24 4 19 48 46 560 490 w w w w w w w w w w MXZ A32W...

Page 23: ...DB 35 WB 24 Heating DB 7 WB 6 Cooling High FUNCTION FAN SPEED Heating High 49 SPL dB A 50 LINE MXZ A18WV E1 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 APPROXIMATE TERESHOLD OF HEARING FOR CONTINUOUS NOISE NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 OCTAVE BAND SOUND PRESSURE LEVEL 0dB 0 0002 MICRO BAR BAND CENTER FREQUENCIES Hz Test conditions Cooling DB 35 WB 24 Heating DB 7 WB 6 Cooli...

Page 24: ...3 Air in Air out REQUIRED SPACE Open as a rule More than100mm if the front and both sides are open More than 100mm 200mm or more if there are obstacles to both sides Open as a rule More than 200mm if the back both sides and top are open More than 350mm More than 100mm Note The dimensions given along the arrrows above are required to guarantee the air conditioner s performance Install the unit in a...

Page 25: ...oth sides clearance fully 2 Service space 100 500 350 500 100 service space More than More than More than More than More than 200 27 16 16 355 387 40 200 500 250 270 35 35 74 Air in Drainage holes 3 33 Air out Air in Base bolt M10 2 U shape notched holes Base bolt M10 2 12O36 Oval hole 250 380 8 50 531 3 900 900 460 317 23 Indoor and outdoor connect wiring 23O45 hole 30 33 320 23 10 88 6 35 flared...

Page 26: ... 33 Air out Air in Base bolt M10 2 U shape notched holes Base bolt M10 2 12O36 Oval hole 531 3 900 480 8 350 900 460 317 50 23 Indoor and outdoor connect wiring 23O45 hole 30 33 320 23 10 88 Gas pipe 12 7 flared 1 2 A B unit 9 52 flared 3 8 C D unit 6 35 flared 1 4 Liquid pipe D unit connection C unit connection B unit connection A unit connection 1 Installation space Note Leave front and both sid...

Page 27: ...4 R V COIL OUTDOOR FAN MOTOR COMPRESSOR RELAY FAN MOTOR RELAY SOLENOID COIL RELAY NAME HIGH PRESSURE PROTECT THERMISTOR SYMBOL L L63 LEV B NR63 R62 R64B RT6A RT6B GAS PIPE TEMPERATURE B THERMISTOR GAS PIPE TEMPERATURE A THERMISTOR RESISTOR RESISTOR VARISTOR EXPANSION VALVE B COIL NORMAL MODE CHOKE COIL NAME REACTOR CURRENT TRANSFORMER SMOOTHING CAPACITOR SMOOTHING CAPACITOR IPM POWER TRANSISTOR MO...

Page 28: ...B4 BLU N N N UNIT A INDOOR UNIT B INDOOR UNIT C INDOOR TAB2 TAB1 BREAKER CIRCUIT GRN YLW BLU BLK N L TB1 PE TO INDOOR UNIT CONNECTING 12V POWER BOARD P C BOARD FILTER NOISE ELECTRONIC CONTROL P C BOARD SG79Y271H01 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 ele...

Page 29: ...3 N F 1A CT2 CT1 5 4 3 2 1 BLK BLK BLK BLK TAB4 X64 3 15A F912 R64 L YLW RED BLK WHT R S 1 4 3 2 POWER SUPPLY N 230V 50Hz CN801 3 2 1 2 1 CN701 6 7 1 2 3 4 5 CN702 5 4 3 2 1 CN781 3 15A F801 POWER BOARD P C BOARD FILTER NOISE ELECTRONIC CONTROL P C BOARD SG79Y270H01 Terminal block Connector 3 Symbols below indicate 2 Use copper conductors only for field wiring diagram for servicing refer to the in...

Page 30: ... be connected When using extension pipes refer to the tables below When diameter of refrigerant pipe is different from that of outdoor unit union use optional Different diameter pipe For further information on Different diameter pipe see page BACK COVER Indoor unit Extension pipe diameter class Pipe diameter Liquid 6 35 1 4 Liquid 6 35 1 4 07 09 Gas 9 52 3 8 Gas 9 52 3 8 Liquid 6 35 1 4 Liquid 6 3...

Page 31: ...nsion pipes refer to the tables below When diameter of refrigerant pipe is different from that of outdoor unit union use optional Different diameter pipe For further information on Different diameter pipe see page BACK COVER Indoor unit Extension pipe diameter class Pipe diameter Liquid 6 35 1 4 Liquid 6 35 1 4 07 09 Gas 9 52 3 8 Gas 9 52 3 8 Liquid 6 35 1 4 Liquid 6 35 1 4 12 Gas Gas 12 7 1 2 Liq...

Page 32: ...3 8 Gas 9 52 3 8 Liquid 6 35 1 4 Liquid 6 35 1 4 12 Gas Gas 12 7 1 2 Liquid 6 35 1 4 Liquid 6 35 1 4 18 Gas 12 7 1 2 Gas 12 7 1 2 Liquid 6 35 1 4 Liquid 6 35 1 4 24 Gas 15 88 5 8 Gas 15 88 5 8 Liquid 9 52 3 8 Liquid 9 52 3 8 26 Gas 15 88 5 8 Gas 15 88 5 8 9 52 3 8 or 12 7 1 2 Indoor unit D Ball valve with service port Ball valve with service port Distributor Receiver LEV A LEV B LEV C LEV D Oil se...

Page 33: ...ntake air wet dry bulb temperature and the indoor outlet air wet dry bulb temperature for your reference at service How to measure the indoor air wet bulb dry bulb temperature difference 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 atta...

Page 34: ...32WV E1 E1 07 class 8 5 7 8 7 1 6 4 5 8 5 1 9 3 8 5 7 8 7 0 6 3 5 6 26 class 24 class 10 6 9 7 8 8 7 9 7 1 6 3 13 1 11 9 10 8 9 7 8 7 7 7 13 7 12 4 11 3 10 1 9 0 8 0 17 0 15 4 13 9 12 5 11 1 9 7 18 class 12 class 09 class 25 4 23 4 21 5 19 5 17 6 15 6 13 7 11 7 24 0 22 2 20 3 18 5 16 6 14 8 12 9 11 1 07 class 09 class 24 class 26 class 25 9 23 9 21 9 19 9 17 9 15 9 13 9 12 0 31 4 29 0 26 6 24 1 21...

Page 35: ... 100 150 0 5 1 0 1 5 0 50 100 150 0 5 1 0 1 5 COOL Capacity Frequency Hz Frequency COOL Total input Hz Hz HEAT Capacity Frequency Frequency HEAT Total input Hz COOL Capacity Frequency Hz Frequency COOL Total input Hz HEAT Capacity Frequency 0 50 100 150 0 5 1 0 1 5 Frequency HEAT Total input Hz COOL Capacity Frequency Hz Frequency COOL Total input Hz HEAT Capacity Frequency Hz Hz Frequency HEAT To...

Page 36: ... 2 09 class unit in single operation 3 12 class unit in single operation 4 18 class unit in single operation 0 50 100 150 0 5 1 0 1 5 COOL Capacity Frequency Hz 0 50 100 150 0 5 1 0 1 5 COOL Total input Frequency Hz 0 50 100 150 0 5 1 0 1 5 HEAT Capacity Frequency Hz 0 50 100 150 0 5 1 0 1 5 HEAT Total input Frequency Hz 5 24 class unit in single operation 0 50 100 150 0 5 1 0 1 5 HEAT Total input...

Page 37: ... 5 COOL Capacity Frequency Hz 0 50 100 150 0 5 1 0 1 5 COOL Total input Frequency Hz 0 50 100 150 0 5 1 0 1 5 HEAT Capacity Frequency Hz 6 26 class unit in single operation 0 50 100 150 0 5 1 0 1 5 HEAT Total input Frequency Hz ...

Page 38: ...on button 3 Compressor starts running at rated frequency 4 Indoor fan runs at High speed and continues for 30 minutes 5 To cancel this operation press emergency operation button or any button on remote controller Indoor Outdoor Set air flow to High speed Inverter output frequency is 45Hz 2 HEAT operation DB C 20 0 WB C 14 5 DB C 2 7 15 20 0 WB C 1 6 12 14 5 15 20 25 30 50 60 70 35 0 5 0 6 0 7 0 8 ...

Page 39: ...arts running at rated frequency 4 Indoor fan runs at High speed and continues for 30 minutes 5 To cancel this operation press emergency operation button or any button on remote controller 2Air flow speed High 3Inverter output frequency 33Hz Indoor Outdoor Set air flow to High speed Inverter output frequency is 45Hz 2 HEAT operation DB C 20 0 WB C 14 5 DB C 2 7 15 20 0 WB C 1 6 12 14 5 15 20 25 30 ...

Page 40: ...tarts running at rated frequency 4 Indoor fan runs at HI speed and continues for 30 minutes 5 To cancel this operation press emergency operation button or any button on remote controller 2Air flow speed High 3Inverter output frequency 33Hz Indoor Outdoor Set air flow to High speed Inverter output frequency is 45Hz 2 HEAT operation DB C 20 0 WB C 14 5 DB C 2 7 15 20 0 WB C 1 6 12 14 5 15 20 25 30 3...

Page 41: ...tton 3 Compressor starts running at rated frequency 4 Indoor fan runs at High speed and continues for 30 minutes 5 To cancel this operation press emergency operation button or any button on remote controller Indoor Outdoor Set air flow to High speed Inverter output frequency is 32Hz 2 HEAT operation DB C 20 0 WB C 14 5 DB C 2 7 15 20 0 WB C 1 6 12 14 5 5 10 15 20 25 2 3 4 5 6 7 Ambient temperature...

Page 42: ...tton 3 Compressor starts running at rated frequency 4 Indoor fan runs at High speed and continues for 30 minutes 5 To cancel this operation press emergency operation button or any button on remote controller 2Air flow speed High 3Inverter output frequency 24Hz Indoor Outdoor Set air flow to High speed Inverter output frequency is 32Hz 2 HEAT operation DB C 20 0 WB C 14 5 DB C 2 7 15 20 0 WB C 1 6 ...

Page 43: ...ton 3 Compressor starts running at rated frequency 4 Indoor fan runs at High speed and continues for 30 minutes 5 To cancel this operation press emergency operation button or any button on remote controller 2Air flow speed High 3Inverter output frequency 24Hz Indoor Outdoor Set air flow to High speed Inverter output frequency is 32Hz 2 HEAT operation DB C 20 0 WB C 14 5 DB C 2 7 15 20 0 WB C 1 6 1...

Page 44: ...y operation button 3 Compressor starts running at rated frequency 4 Indoor fan runs at High speed 5 To cancel this operation press emergency operation button or any button on remote controller Air flow speed High Inverter output frequency 24Hz Indoor Outdoor Set air flow to High speed Inverter output frequency is 32Hz 2 HEAT operation DB C 20 0 WB C 14 5 DB C 2 7 15 20 0 WB C 1 6 12 14 5 5 10 15 2...

Page 45: ...y operation button 3 Compressor starts running at rated frequency 4 Indoor fan runs at High speed 5 To cancel this operation press emergency operation button or any button on remote controller Air flow speed High Inverter output frequency 24Hz Indoor Outdoor Set air flow to High speed Inverter output frequency is 32Hz 2 HEAT operation DB C 20 0 WB C 14 5 DB C 2 7 15 20 0 WB C 1 6 12 14 5 5 10 15 2...

Page 46: ...y operation button 3 Compressor starts running at rated frequency 4 Indoor fan runs at High speed 5 To cancel this operation press emergency operation button or any button on remote controller Air flow speed High Inverter output frequency 24Hz Indoor Outdoor Set air flow to High speed Inverter output frequency is 32Hz 2 HEAT operation DB C 20 0 WB C 14 5 DB C 2 7 15 20 0 WB C 1 6 12 14 5 5 10 15 2...

Page 47: ... RT63 Gas pipe temperature thermistor RT6B Gas pipe temperature thermistor RT6A Indoor Unit A Indoor Unit A Outdoor fan motor MF x 61 x 62 Defrost thermistor RT62 LEV A LEV B Outdoor unit control microprocessor Compressor primary current Compressor secondary current Fin temperature thermistor RT65 R V coil 21S4 Input signal Output signal High pressure protect thermistor RT68 MXZ A18WV E1 11 1 INVE...

Page 48: ...SSR61 Indoor Unit A Indoor Unit C Indoor Unit B Gas pipe temperature thermistor RT6A B C Muffler Comp Discharge temperature thermistor RT61 Indoor Unit A Evaporation temperature thermistor RT63 Outdoor fan motor MF Defrost thermistor RT62 LEV A LEV E LEV B LEV C Indoor Unit B Indoor Unit C Outdoor unit control microprocessor R V coil 21S4 High pressure switch 63H1 Input signal Output signal Outdoo...

Page 49: ...stor RT61 Indoor Unit A Evaporation temperature thermistor RT63 Outdoor fan motor MF Transistor module Drive circuit Fan motor drive micropro cessor Defrost thermistor RT62 LEV A LEV E LEV B LEV C LEV D Indoor Unit B Indoor Unit C Indoor Unit D Outdoor unit control microprocessor Comp ressor primary current Fin temperature thermistor RT65 R V coil 21S4 Input signal Output signal High pressure swit...

Page 50: ...s to enter defrosting mode 1 When temperature of defrosting thermistor is 3 or less 2 When specified non defrosting time is counted in the control p c board is satisfied Total time of compressor operating Going to defrosting mode at both condition of 1 and 2 2 Defrosting operation 1 Compressor stops for 50 seconds Indoor fan is off Defrosting lamp lights 2 4 way valve reverses flow Compressor oper...

Page 51: ...tails of Fan Control a The number of rotation will be increased when the temperature of the outdoor heat exchanger is high b The number of rotation will be decreased when the temperature of the outdoor heat exchanger is low The number of rotation will be lowered to around 100 rpm rotation per minute when just a few indoor units are operating or when the outside temperature is low When the number o...

Page 52: ...supposed to be defective check the copper foil pattern for disconnection and the components for bursting and discoloration 3 When troubleshooting refer to the flow chart on this page and the check table on page 53 54 55 and 56 Lead wiring Housing point 12 1 Cautions on troubleshooting 1 Before troubleshooting check the following 1 Check the power supply voltage 2 Check the indoor outdoor connectin...

Page 53: ...lied to the power module 5 times Goes out High pressure protection When high pressure protect thermistor detects 69 or more 3 times Goes out Discharge temperature overheat protection When the discharge temperature thermistor detects 116 or above Protection will be released at 100 or below 4 times Goes out Fin temperature overheat protection When the fin temperature thermistor detects 87 or above 4...

Page 54: ...ency Check points LED 1 Red These symptoms do not mean any abnormality of the product but check the following points Air filter clogging Amount of gas Short cycle of indoor outdoor air flow Once Lighting Current protection When the outdoor unit input current exceeds 13A 6 times Lighting Overload protection When the compressor load exceeds the specified value Twice Lighting High pressure protection...

Page 55: ...ighting 5 times 5 times Lighting Current sensor When the output from compressor current sensor becomes 25A or more while the compressor is operating Check if the connection lead wires of com pressor are correctly connected 6 times Evaporation temperature thermistor When a short or open circuit occurs in the evaporation temperature thermistor during compressor operating Check if the connection wire...

Page 56: ...ow in COOL and 35 C or below in HEAT lasts for 20 minutes 5 times Lighting High pressure protection When outdoor heat exchanger temperature thermistor detects 58 or more LED 2 Yellow Indication Abnormal point Detecting method Symptom It is repeated that outdoor unit stops and restarts 3 minutes later Check points LED 1 Red 5 times Goes out High pressure protection When outdoor heat exchanger tempe...

Page 57: ...short circuit WHT Protector specification Short Open 87I15 135I5 YLW P ORN RED BLK 123 0Ω 150 0Ω 30 0Ω 36 0Ω 181 0Ω 221 0Ω abnormal Measure the resistance using a tester Part temperature 10 C 40 C R V coil Measure the resistance using a tester Part temperature 10 C 40 C Linear expansion valve LEV WHT RED YLW BRN ORN BLU Color of lead wire Normal WHT RED RED ORN YLW BRN BRN BLU Abnormal Open or sho...

Page 58: ...Is the resistance between terminal of reactor L A A Check of power supply Outdoor unit does not operate LED display display OFF MXZ A18WV MXZ A26 A32WV Turn on power supply No Yes Yes No No Yes No Yes Yes No Replace the power board Start Check the connecting of parts of main power supply circuit Is there voltage of 230V AC in the power supply terminal block Is the output voltage from the noise fil...

Page 59: ...al block and check the connection of the connector CN601 unit A CN602 unit B MXZ A18WV CN601 unitA CN602 unitB CN603 unitC CN604 unitD MXZ A26 A32WV in the outdoor electronic control P C board 4 Disconnect the lead wire to the compressor 3 minutes after turning on the power supply start EMERGENCY OPERATION Is there voltage from 5V DC to 10V DC between No 3 and N in the outdoor terminal block Repla...

Page 60: ...ise filter P C board Is there normal resistance to R V coil Start 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 230V AC between pin1 and pin 2 at connector CN912 1 Turn off power supply of indoor and outdoor unit and disconnect the connector CN851 MXZ A18WV CN781 MXZ A26 A32WV in the out...

Page 61: ...and Disconnect the connector CN771 LEV A CN772 LEV B MXZ A18WV CN791 LEV A CN792 LEV B CN793 LEV C CN794 LEVD CN795 LEV E MXZ A26 A32WV Is there normal resistance to LEV coil Normal Replace the outdoor electronic control P C board Replace the LEV coil When cooling heat exchanger of non operating indoor unit frosts When heating non operating indoor unit get warm LED display LED1 LED2 Lighting Light...

Page 62: ...0V 58Hz HEAT 150V 58Hz Is voltage output W Turn off power supply of indoor and outdoor unit and measure the compressor winding resistance between the compressor terminals Is there resistance of 0 53 to 0 66 between the each terminals Replace the outdoor electronic control P C board Reconnect the lead wire of compressor to former and turn on power supply to indoor and outdoor unit 3 minutes later s...

Page 63: ...D U BLK Output voltage COOL 150V 48Hz HEAT 170V 64Hz Is voltage output W Turn off power supply of indoor and outdoor unit and measure the compressor winding resistance between the compressor terminals Is the resistance between each terminal normal Is the input voltage to the outdoor electronic control P C board 370V or more Reconnect the lead wire of compressor to former and turn on power supply t...

Page 64: ...tor is abnormal When the LED display is a table below MXZ A18WV MXZ A26 A32WV Normal Yes No Abnormal Reconnect the connector CN661 and CN662 on the outdoor electronic control P C board and CN3 on the power board and disconnect the lead wire leading to the compressor 3 minutes after turning on the power supply start EMERGENCY OPERATION Thermistor Discharge temperature thermistor Defrost thermistor ...

Page 65: ...here voltage of 12V DC between CN851 pin3 and pin6 1 Disconnect the lead wire leading to the compressor 3 minutes after turning on the power supply start EMERGENCY OPERATION 2 Check the voltage between pin 3 and pin 4 pin 3 and pin 5 at the fan motor connector Replace the noise filter P C board Fan motor does not operate or stops operating shortly after starting the operation MXZ A18WV MXZ A26 A32...

Page 66: ...First of all check the high pressure switch can be shorted turn OFF the power and turn ON again 1 minute later Indoor unit dose not operate different operating models in multisystem When you try to run two indoor unit simultaneously one for cooling and the other for heating the unit which transmits signal to the outdoor units earlier decides the operation mode The other unit indicates as shown in ...

Page 67: ...hermistor RT65 MXZ A18WV Outdoor electronic control P C board E1 230V AC 50Hz Input Gas pipe temperature A thermistor RT6A Gas pipe temperature B thermistor RT6B CN 661 Defrost thermistor RT62 Discharge temperature thermistor RT61 Evaporation temperature thermistor RT63 High pressure protect thermistor RT68 CN 662 CN663 Fin temperature thermistor RT65 CN771 Room A Linear expansion valve LEV 12V DC...

Page 68: ...mperature thermistor RT68 Rush current relay R V coil 12V DC 15V 15V CN931 CN661 CN701 Signal transmission To power board 5V DC pulse wave GND CN702 Signal reception From power board 5V DC pulse wave GND power board CN781 CN795 12V DC pulse wave LEV E CN604 CN603 CN602 CN601 CN791 CN792 CN793 CN794 CN681 CN662 20 10 0 10 20 30 40 100 90 80 70 60 50 40 30 20 10 0 0 10 20 30 40 50 60 70 80 200 180 1...

Page 69: ...board Electronic control board 230V AC 50Hz Input CN911 Outdoor Fan Fan speed High 230V AC 230V AC 50Hz Output F912 FUSE 3 15A 250V NR63 VARISTOR CN912 R V Coil 230V AC CN911 Outdoor Fan Fan speed Low 230V AC MXZ A18WV Noise filter P C board E1 F911 FUSE 1A 250V F912 FUSE 3 15A 250V NR63 VARISTOR F911 FUSE 1A 250V ...

Page 70: ...V 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 5V DC pulse wave 2 5 Zero cross signal 3 4 Not used 6 5 15V 7 5 15V Signal reception From electronic control P C board 5V DC pulse wave CN3 Fin temperature thermistor ...

Page 71: ...ove indoor outdoor connecting wire and power supply cable 3 Remove the compressor connector on the compressor side 4 Remove the connectors for fan motor LEV thermistor and R V coil from the electronic control P C board 5 Remove the screws of the inverter assembly 6 Remove the inverter assembly Photo 3 Photo 4 Photo 2 Compressor connector Screws of the front panel Screws of the top panel Screws of ...

Page 72: ...at sink 7 Remove the hooks fixing the electronic control P C board 8 Disconnect all the connectors and the terminal on the electronic control P C board 9 Remove the electronic control P C board 4 Removing the propeller and fan motor 1 Remove the top panel service panel and front panel 2 Remove the fan motor connector CN911 from the noise filter P C board Remove the inverter assembly and then lead ...

Page 73: ...ce panel and front panel 2 Remove the connector coming out of the compressor 3 Remove the compressor connector coming out of the electronic control P C board Fig 1 4 Remove the electronic control P C board 5 Remove the screws fixing the heat sink from the electronic control P C board Tightening torque IPM M4 1 18 I0 2 Nm DS M3 0 78 I0 2 Nm AFM M3 5 0 98 I0 2 Nm Caution Be sure to keep silicon oil ...

Page 74: ... and power supply cable 3 Remove the top panel service panel front panel and back panel 4 Remove the inverter assembly 5 In case of removing 4 way valve detach welded parts first 6 Remove the terminal cover then pull out the lead wire from the terminal of compressor Remove the soundproof felt 7 Detach welded parts of compressor suction and discharge pipes 8 Remove the compressor nuts and remove th...

Page 75: ...the noise filter P C board connector CN912 6 Remove the screws of the electrical parts and remove the electrical parts 7 Remove the propeller 8 Remove the screws of the separator and remove the separator 9 Remove the sound proof felt 10 Detach the welded parts of the compressor suction and dis charge pipes Photo 3 11 Remove the compressor nuts and remove the compressor Photo 1 Screws of service pa...

Page 76: ...anel Photo 1 Gas recovery is not required if the unit is pumped down 3 Remove the LEV coil 4 Detach the welded parts of expansion valves and pipes 4 way valve R V coil Welded parts LEV coils Expansion valves Photo 5 Photo 6 2 Removing the fan motor 1 Remove the top panel the service panel and the front panel Photo 1 2 Disconnect the connector CN911 on the outdoor electronic control P C board 3 Rem...

Page 77: ... OPERATING PROCEDURE PHOTOS 5 Removing the reactor 1 Remove the top panel Photo 1 2 Disconnect the reactor lead wire 3 Remove the screws of the reactor and remove the reactor Photo 7 Screws of the reactor ...

Page 78: ...735 936 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 FAN GUARD CABINET HANDLE PROPELLER OUTDOOR FAN MOTOR COMPRESSOR RUBBER SET COMPRESSOR BASE STOP VALVE GAS STOP VALVE LIQUID LEV COIL LEV COIL EXPANSION VALVE CAPILLARY TUBE 4 WAY VALVE R V COIL SERVICE PANEL BACK PANEL OUT HANDLE MOTOR SUPPORT OUTDOOR HEAT EXCHANGER TOP PANEL MUFFLER CAPILLARY TUBE CAPILLARY TUBE RA6V49 3RUB...

Page 79: ...INAL BLOCK FUSE HOLDER FUSE GAS PIPE TEMPERATURE THERMISTOR SET THERMISTOR SET ELECTRONIC CONTROL P C BOARD FIN TEMPERATURE THERMISTOR FUSE VARISTOR FUSE No L TB2 TB1 F61 RT6A RT6B RT61 RT62 RT63 RT68 RT65 F912 NR63 F801 F911 1 1 1 1 1 1 1 1 1 1 1 1 20A 250VAC 3 15A 250V 1A 250V DISCHARGE DEFROST EVAPORATOR HIGH PRESSURE PROTECT 2 7 4 9 1 3 5 6 8 Part numbers that are circled are not shown in the ...

Page 80: ...80 MXZ A26WV MXZ A32WV 14 4 OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS E1 E1 3 2 1 4 13 16 22 23 24 25 5 6 12 11 7 89 10 17 15 14 18 19 20 21 2 ...

Page 81: ...ALVE LEV COIL EXPANSION VALVE EXPANSION VALVE LEV COIL EXPANSION VALVE EXPANSION VALVE LEV COIL EXPANSION VALVE EXPANSION VALVE LEV COIL EXPANSION VALVE BASE ASSEMBLY UNION PIPE COVER BALL VALVE 3 8 BALL VALVE 5 8 REAR PANEL POWER RECEIVER 4 WAY VALVE HIGH PRESSURE SWICH EXPANSION VALVE LEV COIL TOP PANEL REAR GUARD HEAT EXCHANGER SIDE PANEL CAPILLARY TUBE CAPILLARY TUBE SET CAPILLARY TUBE CAPILLA...

Page 82: ...EMPERATURE THERMISTOR ELECTRONIC CONTROL P C BOARD ELECTRONIC CONTROL P C BOARD REACTOR NOISE FILTER P C BOARD TERMINAL BLOCK TERMINAL BLOCK GAS PIPE TEMPERATURE THERMISTOR GAS PIPE TEMPERATURE THERMISTOR R V COIL THERMISTOR SET FUSE FUSE FUSE VARISTOR SET No MF RT65 L TB2 5 TB1 RT6A B C RT6A B C D 21S4 RT61 62 63 68 F801 F911 F912 NR63 1 1 1 1 1 1 1 3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 4 1 1 1 1 1 1 1 P...

Page 83: ...gth B 9 52 3 8 12 7 1 2 12 7 1 2 12 7 1 2 9 52 3 8 15 88 5 8 Length C 9 52 12 7 3 8 1 2 12 7 9 52 1 2 3 8 12 7 15 88 1 2 5 8 15 2 Outlet guide Changes air discharge direction Model name Model code Applied unit MAC 855SG 51H 855 MXZ A26WV MXZ A32WV 610 4 534 534 386 416 51 8 150 109 4 29 2 760 8 760 8 29 2 6 4 6 4 832 386 Punched hole Punched hole 5 6 5 6 MAC 855SG 1 MXZ A26WV MXZ A32WV 14 6 ACCESS...

Page 84: ...RIC ENGINEERING CO LTD Distributed in Dec 2003 No OB319 7 Made in Japan New publication effective Dec 2003 Specifications subject to change without notice HEAD OFFICE MITSUBISHI DENKI BLDG 2 2 3 MARUNOUCHI CHIYODA KU TOKYO100 8310 JAPAN ...

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