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Mitsubishi Electric MXZ-2A30VA - E1 Service Manual

Split-type air conditioners
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SPLIT-TYPE AIR CONDITIONERS

OUTDOOR UNIT

SERVICE MANUAL

Models
MXZ-2A30VA -
MXZ-2A30VA -
MXZ-2A40VA -
MXZ-2A40VA -
MXZ-2A52VA -
MXZ-2A52VA -
MXZ-3A54VA -
MXZ-3A54VA -
MXZ-3A54VA -
MXZ-3A54VA -
MXZ-3A54VA -
MXZ-3A54VA -
MXZ-3A54VA -
MXZ-4A71VA -
NOTE:
• RoHS compliant products have mark on the spec
name plate.
For servicing of RoHS compliant products, refer to the
RoHS Parts List.
MXZ-4A71VA -
E1
MXZ-4A71VA -
E2
MXZ-4A71VA -
E1
MXZ-4A71VA -
E2
MXZ-4A71VA -
E1
MXZ-4A71VA -
E2
MXZ-4A80VA -
E1
MXZ-4A80VA -
E2
MXZ-5A100VA -
E3
E4
Indoor unit service manual
MSZ-FA•VA Series (OB371)
E5
MSZ-GA•VA Series (OB378, OB388)
E6
MSZ-CB•VA Series (OB441)
MSZ-GC•VA Series (OBH468)
E7
MSZ-GE•VA Series (OBH515)
E1
MSZ-FD•VA Series (OBH488)
MXZ-4A80VA
-
E1
Revision H:
• Indoor units combinations for 42 class
have been added.
• MXZ-3A54VA-
have been added.
Please void OB377 REVISED EDITION-G.
HFC
utilized
R410A
CONTENTS
1. TECHNICAL CHANGES ··································· 2
2. PART NAMES AND FUNCTIONS ····················· 8
CORRESPONDENCE TABLE ························ 10
4. INDOOR UNITS COMBINATION ···················· 14
5. SPECIFICATION ·············································· 61
6. NOISE CRITERIA CURVES ···························· 66
7. OUTLINES AND DIMENSIONS ······················ 68
8. WIRING DIAGRAM ·········································· 75
9. REFRIGERANT SYSTEM DIAGRAM ············· 87
10. PERFORMANCE CURVES ····························· 97
11. ACTUATOR CONTROL ··································115
12. SERVICE FUNCTIONS ···································116
13. TROUBLESHOOTING ··································· 120
14. DISASSEMBLY INSTRUCTIONS ·················· 145
15. PARTS LIST ··················································· 160
16. RoHS PARTS LIST ········································ 172
17. OPTIONAL PARTS ······················ BACK COVER
and MXZ-4A71VA-
E7
No. OB377
REVISED EDITION-H
E2
E3
E4
E5
E6
E7
E1
E2
E1
E7

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  Summary of Contents for Mitsubishi Electric MXZ-2A30VA - E1

  • Page 1: Table Of Contents

    Revision H: • Indoor units combinations for 42 class have been added. • MXZ-3A54VA- and MXZ-4A71VA- have been added. SPLIT-TYPE AIR CONDITIONERS Please void OB377 REVISED EDITION-G. OUTDOOR UNIT No. OB377 SERVICE MANUAL REVISED EDITION-H utilized R410A Models MXZ-2A30VA - MXZ-4A71VA - MXZ-2A30VA - MXZ-4A71VA -...
  • Page 2: Technical Changes

    Revision A : • MXZ-3A54VA- and MXZ-4A71VA- have been added. Quick clean kit has been removed. (Refer to 2.) • MXZ-2A40VA- and MXZ-2A52VA- have been added. Revision B : • MXZ-2A30VA- and MXZ-2A40VA- have been added. • “Check of HPS” has been corrected. •...
  • Page 3 MXZ-A32WV - MXZ-4A80VA - 1. Indication of capacity has been changed. (BTU 2. Communication system has been changed. 3. Power supply way has been changed (change to supply to outdoor unit). 4. Evaporation temperature thermistor has been removed. 5. Ambient temperature thermistor has been added. 6.
  • Page 4 MXZ-3A54VA - MXZ-3A54VA - 1. Compressor has been changed. (SNB130FLDH1 SNB130FLEH1) 2. Electronic control P.C. board has been changed. MXZ-4A71VA - MXZ-4A71VA - 1. Compressor has been changed. (SNB130FLDH1 SNB130FLEH1) 2. Electronic control P.C. board has been changed. MXZ-4A80VA - MXZ-4A80VA - 1.
  • Page 5 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 air conditioners. As R410A has working pressure approximately 1.6 times as high as that of R22, some special tools and piping parts/ materials are required.
  • Page 6 New Specification Current Specification The incompatible refrigeration oil easily separates from Since refrigerant and refrigeration oil are compatible, refrigerant and is in the upper layer inside the suction muffler. refrigeration oil goes back to the compressor through the Raising position of the oil back hole enables to back the lower position oil back hole.
  • Page 7 2. Refrigerant piping Specifications Use the copper or copper-alloy seamless pipe for refrigerant that meet the following specifications. Outside diameter Wall thickness Insulation material 6.35 0.8 mm Heat resisting foam plastic 9.52 0.8 mm Specific gravity 0.045 Thickness 8 mm 12.7 0.8 mm 15.88...
  • Page 8: Part Names And Functions

    PART NAMES AND FUNCTIONS MXZ-2A30VA MXZ-3A54VA MXZ-2A40VA MXZ-4A71VA MXZ-2A52VA Air inlet Air inlet (Back and side) (Back and side) Piping Drain hose Air outlet Air outlet Drain outlet Drain outlet MXZ-3A54VA MXZ-4A71VA Air inlet (Back and side) Air outlet Drain outlet...
  • Page 9 MXZ-4A80VA MXZ-4A80VA MXZ-5A100VA Air inlet Air inlet (Back and side) (Back and side) Air outlet Air outlet Drain outlet Drain outlet ACCESSORIES MXZ-3A54VA - E2 , E3 , E4 , E5 , E6 , E7 MXZ-2A30VA MXZ-3A54VA - MXZ-4A71VA - E2 , E3 , E4 , E5 , E6 , E7 MXZ-2A40VA MXZ-4A71VA -...
  • Page 10: Indoor/Outdoor Correspondence Table

    INDOOR/OUTDOOR CORRESPONDENCE TABLE There is no combination other than this table. MXZ-2A30VA MXZ-4A71VA MXZ-4A71VA 22+22 22+22 35+35+50 22+25 22+25 35+42+42 22+35 25+25 22+22+22+22 22+42 22+22+22+25 22+50 22+22+22+35 22+60 22+22+22+42 MXZ-2A40VA 25+25 22+22+22+50 22+22 25+35 22+22+25+25 22+25 25+42 22+22+25+35 22+35 25+50 22+22+25+42 25+25 25+60...
  • Page 11 There is no combination other than this table. MXZ-4A80VA MXZ-4A80VA MXZ-4A80VA 22+22 25+25+42 22+35+35+35 22+25 25+25+50 22+35+35+42 22+35 25+25+60 22+35+35+50 22+42 25+25+71 22+35+42+42 22+50 25+35+35 25+25+25+25 22+60 25+35+42 25+25+25+35 22+71 25+35+50 25+25+25+42 25+25 25+35+60 25+25+25+50 25+35 25+35+71 25+25+25+60 25+42 25+42+42 25+25+35+35 25+50 25+42+50...
  • Page 12 There is no combination other than this table. MXZ-5A100VA MXZ-5A100VA MXZ-5A100VA MXZ-5A100VA 22+22 22+60+60 22+22+22+71 25+25+25+35 22+25 22+60+71 22+22+25+25 25+25+25+42 22+35 25+25+25 22+22+25+35 25+25+25+50 22+42 25+25+35 22+22+25+42 25+25+25+60 22+50 25+25+42 22+22+25+50 25+25+25+71 22+60 25+25+50 22+22+25+60 25+25+35+35 22+71 25+25+60 25+25+35+42 22+22+25+71 25+25 25+25+71 25+25+35+50...
  • Page 13 There is no combination other than this table. MXZ-5A100VA 22+22+22+35+50 MXZ-5A100VA 22+22+22+35+60 25+25+25+42+42 22+22+22+35+71 25+25+25+42+50 22+22+22+42+42 25+25+35+35+35 22+22+22+42+50 25+25+35+35+42 22+22+22+42+60 25+25+35+35+50 22+22+25+25+25 25+25+35+42+42 22+22+25+25+35 22+22+25+25+42 22+22+25+25+50 22+22+25+25+60 22+22+25+25+71 22+22+25+35+35 22+22+25+35+42 22+22+25+35+50 22+22+25+35+60 22+22+25+42+42 22+22+25+42+50 22+22+25+42+60 22+22+35+35+35 22+22+35+35+42 22+22+35+35+50 22+22+35+42+42 22+22+35+42+50 22+22+42+42+42 22+25+25+25+25 22+25+25+25+35...
  • Page 14: Indoor Units Combination

    INDOOR UNITS COMBINATION MXZ-2A30VA NOTE: Electrical data is for outdoor unit only. Cooling capacity (kW) Outdoor unit Power Indoor units Current power consumption factor Total Unit B combination Unit A (kW) 0.430 2.20 – 2.08 (0.9 - 3.0) (0.120 - 0.620) 0.490 2.50 –...
  • Page 15 MXZ-2A40VA NOTE: Electrical data is for outdoor unit only. Cooling capacity (kW) Outdoor unit Power Indoor units Current power consumption factor Total Unit B combination Unit A (kW) 0.430 2.20 – 2.08 (0.9 - 3.0) (0.120 - 0.620) 0.490 2.50 –...
  • Page 16 MXZ-2A52VA NOTE: Electrical data is for outdoor unit only. Cooling capacity (kW) Outdoor unit Power Indoor units Current power consumption factor Total combination Unit B Unit A (kW) 0.430 2.20 – 2.08 (0.9 - 3.0) (0.120 - 0.620) 0.490 2.50 –...
  • Page 17 MXZ-3A54VA NOTE: Electrical data is for outdoor unit only. Outdoor unit Power Cooling capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Total (kW) 0.590 2.59 ( 1.4 3.0 ) ( 0.420 0.740 ) 0.660 2.90 ( 1.4...
  • Page 18 MXZ-3A54VA NOTE: Electrical data is for outdoor unit only. Outdoor unit Power Cooling capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Total (kW) 1.45 1.65 1.295 5.69 22+25+35 ( 2.9 6.8 ) ( 0.670 1.770 ) 1.33 1.52...
  • Page 19 MXZ-3A54VA NOTE: Electrical data is for outdoor unit only. Outdoor unit Power Heating capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Total (kW) 0.820 3.60 ( 1.2 - 4.2 ) ( 0.380 - 1.090 ) 0.910 4.00 ( 1.2 - 4.5 ) ( 0.380 - 1.190 )
  • Page 20 MXZ-3A54VA NOTE: Electrical data is for outdoor unit only. Outdoor unit Power Heating capacity (kW) Indoor units Current power consumption factor combination Total Unit A Unit B Unit C (kW) 1.83 2.07 1.455 6.39 22+25+35 ( 2.6 - 9.0 ) ( 0.500 - 2.120 ) 1.68 1.91 3.21...
  • Page 21 MXZ-4A71VA NOTE: Electrical data is for outdoor unit only. Outdoor unit Power Cooling capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Total (kW) 0.590 2.59 ( 1.4 - 3.0 ) ( 0.420 - 0.740 0.660 2.90...
  • Page 22 Outdoor unit Power Cooling capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Total (kW) 2.420 10.63 60+60 ( 2.1 - 7.1 ) ( 0.580 - 2.630 1.750 7.69 22+22+22 ( 2.9 - 8.1 ) ( 0.670 - 2.390 1.880 8.26...
  • Page 23 Outdoor unit Power Cooling capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Total (kW) 1.74 2.44 2.92 1.97 8.65 25+35+42 ( 2.9 - 8.5 ) ( 0.670 - 2.700 1.61 2.26 3.23 1.96 8.61...
  • Page 24 Outdoor unit Power Cooling capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Total (kW) 1.26 1.43 2.00 2.41 1.92 8.43 22+25+35+42 ( 3.7 - 8.8 ) ( 0.800 - 2.760 1.77 1.77 1.77 1.77...
  • Page 25 Outdoor unit Power Heating capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Total (kW) 0.820 3.60 ( 1.2 - 4.2 ) ( 0.380 - 1.090 0.910 4.00 ( 1.2 - 4.5 ) ( 0.380 - 1.190 1.040 4.57...
  • Page 26 Outdoor unit Power Heating capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Total (kW) 1.820 7.99 60+60 ( 1.9 - 9.0 ) ( 0.360 - 2.040 2.87 2.87 2.87 2.020 8.87 22+22+22 ( 2.6 - 9.0 ) ( 0.500 - 2.120...
  • Page 27 Outdoor unit Power Heating capacity (kW) Indoor units Current factor power consumption combination Unit A Unit B Unit C Unit D Total (kW) 2.11 2.95 3.54 1.940 8.52 25+35+42 ( 2.6 - 9.0 ) ( 0.490 - 2.040 1.95 2.74 3.91 1.860 8.17...
  • Page 28 Outdoor unit Power Heating capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Total (kW) 1.53 1.73 2.43 2.91 1.860 8.17 22+25+35+42 ( 3.4 - 9.0 ) ( 0.600 - 1.940 2.15 2.15 2.15 2.15...
  • Page 29 MXZ-4A80VA NOTE: Electrical data is for outdoor unit only. Outdoor unit Power Cooling capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Total (kW) 0.680 2.99 ( 1.4 - 3.0 ) ( 0.400 - 0.920 0.760 3.34...
  • Page 30 Outdoor unit Power Cooling capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Total (kW) 2.860 12.56 42+50 ( 2.0 - 8.8 ) ( 0.560 - 3.190 2.880 12.65 42+60 ( 2.0 - 8.8 ) ( 0.560 - 3.150 2.880 12.65...
  • Page 31 Outdoor unit Power Cooling capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Total (kW) 1.65 3.15 3.15 7.95 2.300 10.10 22+42+42 ( 2.9 - 9.0 ) ( 0.680 - 2.880 1.53 2.93 3.49 7.95...
  • Page 32 Outdoor unit Power Cooling capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Total (kW) 2.33 2.33 3.34 2.260 9.93 35+35+50 ( 2.9 - 9.0 ) ( 0.700 - 2.870 2.15 2.15 3.70 2.260 9.93...
  • Page 33 Outdoor unit Power Cooling capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Total (kW) 2.090 9.18 22+22+42+50 ( 3.7 - 9.2 ) ( 0.780 - 2.570 1.22 1.22 2.78 2.78 2.070 9.09 22+22+50+50 ( 3.7 - 9.2 ) ( 0.770 -...
  • Page 34 Outdoor unit Power Heating capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Total (kW) 1.050 4.61 ( 1.3 - ) ( 0.340 - 1.380 1.110 4.87 ( 1.2 - ) ( 0.340 - 1.510 1.210 5.31...
  • Page 35 Outdoor unit Power Heating capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Total (kW) 2.460 10.80 42+50 ( 1.8 - 10.9 ) ( 0.460 - 3.370 2.460 10.80 42+60 ( 1.8 - 10.9 ) ( 0.460 - 3.370 2.460 10.80...
  • Page 36 Outdoor unit Power Heating capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Total (kW) 2.080 9.13 22+42+42 ( 2.7 - 11.6 ) ( 0.510 - 3.240 2.000 8.78 22+42+50 ( 2.7 - 11.6 ) ( 0.500 - 3.160 2.000 8.78...
  • Page 37 Outdoor unit Power Heating capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Total (kW) 2.74 2.74 3.92 2.010 8.83 35+35+50 ( 2.7 - 11.6 ) ( 0.510 - 3.160 2.53 2.53 4.34 2.010 8.83...
  • Page 38 Outdoor unit Power Heating capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Total (kW) 1.780 7.82 22+22+42+50 ( 3.4 - 11.6 ) ( 0.560 - 3.170 1.44 1.44 3.26 3.26 1.750 7.69 22+22+50+50 ( 3.4 - 11.6 ) ( 0.550 -...
  • Page 39 MXZ-5A100VA NOTE: Electrical data is for outdoor unit only. Outdoor unit Power Cooling capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Unit E Total (kW) 2.20 0.680 2.99 0.400 0.920 2.50 0.760 3.34 0.400...
  • Page 40 Outdoor unit Power Cooling capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Unit E Total (kW) 3.61 4.29 2.740 12.03 42+50 0.560 3.280 3.34 4.76 2.890 12.69 42+60 0.560 3.280 3.20 5.40 3.170 13.92...
  • Page 41 Outdoor unit Power Cooling capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Unit E Total (kW) 1.58 2.52 5.10 2.810 12.34 22+35+71 0.680 3.120 1.70 3.25 3.25 2.600 11.42 22+42+42 0.700 3.010 1.66 3.17...
  • Page 42 Outdoor unit Power Cooling capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Unit E Total (kW) 1.70 3.41 4.09 2.800 12.30 25+50+60 0.660 3.140 1.58 3.15 4.47 2.730 11.99 25+50+71 10.0 0.660 3.170 1.58...
  • Page 43 Outdoor unit Power Cooling capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Unit E Total (kW) 3.13 3.13 3.13 2.790 12.25 50+50+50 10.8 0.660 3.430 2.97 2.97 3.56 2.790 12.25 50+50+60 10.9 0.660 3.450...
  • Page 44 Outdoor unit Power Cooling capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Unit E Total (kW) 1.34 1.34 3.05 3.67 2.580 11.33 22+22+50+60 10.5 0.770 3.060 1.28 1.28 2.91 4.13 2.550 11.20 22+22+50+71 10.5...
  • Page 45 Outdoor unit Power Cooling capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Unit E Total (kW) 1.39 2.21 2.65 3.15 2.600 11.42 22+35+42+50 10.3 0.800 3.000 1.32 2.09 2.51 3.58 2.600 11.42 22+35+42+60 10.7...
  • Page 46 Outdoor unit Power Cooling capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Unit E Total (kW) 1.43 1.43 2.87 4.07 2.610 11.46 25+25+50+71 11.0 0.770 3.170 1.74 2.42 2.42 2.42 2.510 11.02 25+35+35+35 10.2...
  • Page 47 Outdoor unit Power Cooling capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Unit E Total (kW) 1.59 1.59 1.59 1.59 3.64 10.0 2.915 12.80 22+22+22+22+50 11.0 0.790 3.490 1.49 1.49 1.49 1.49 4.04 10.0...
  • Page 48 Outdoor unit Power Cooling capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Unit E Total (kW) 1.34 1.34 1.53 2.13 3.66 10.0 2.905 12.76 22+22+25+35+60 11.0 0.780 3.500 1.43 1.43 1.64 2.75 2.75 10.0...
  • Page 49 Outdoor unit Power Cooling capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Unit E Total (kW) 1.36 2.16 2.16 2.16 2.16 10.0 2.920 12.82 22+35+35+35+35 11.0 0.780 3.500 1.30 2.07 2.07 2.07 2.49 10.0...
  • Page 50 Outdoor unit Power Heating capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Unit E Total (kW) 3.30 1.050 4.61 0.340 1.590 3.60 1.110 4.87 0.340 1.740 4.00 1.210 5.31 0.330 1.810 5.40 1.740 7.64...
  • Page 51 Outdoor unit Power Heating capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Unit E Total (kW) 4.79 5.71 10.5 3.180 13.97 42+50 11.1 0.460 3.590 4.36 6.24 10.6 3.190 14.01 42+60 11.3 0.460 3.650...
  • Page 52 Outdoor unit Power Heating capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Unit E Total (kW) 1.89 3.01 6.10 11.0 2.860 12.56 22+35+71 12.6 0.510 3.320 2.28 4.36 4.36 11.0 2.870 12.60 22+42+42 12.6...
  • Page 53 Outdoor unit Power Heating capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Unit E Total (kW) 2.04 4.07 4.89 11.0 2.700 11.86 25+50+60 12.6 0.490 3.380 1.88 3.77 5.35 11.0 2.700 11.86 25+50+71 12.6...
  • Page 54 Outdoor unit Power Heating capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Unit E Total (kW) 3.67 3.67 3.67 11.0 2.700 11.86 50+50+50 12.6 0.490 3.250 3.43 3.44 4.13 11.0 2.690 11.81 50+50+60 12.6...
  • Page 55 Outdoor unit Power Heating capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Unit E Total (kW) 1.57 1.57 3.57 4.29 11.0 2.260 9.93 22+22+50+60 13.3 0.580 3.870 1.47 1.47 3.33 4.73 11.0 2.260 9.93...
  • Page 56 Outdoor unit Power Heating capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Unit E Total (kW) 1.61 2.59 3.10 3.69 11.0 2.400 10.54 22+35+42+50 13.3 0.600 3.900 1.52 2.42 2.91 4.15 11.0 2.300 10.10...
  • Page 57 Outdoor unit Power Heating capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Unit E Total (kW) 1.61 1.61 3.22 4.56 11.0 2.240 9.84 25+25+50+71 13.3 0.580 3.880 2.12 2.96 2.96 2.96 11.0 2.520 11.07...
  • Page 58 Outdoor unit Power Heating capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Unit E Total (kW) 1.91 1.91 1.91 1.91 4.36 12.0 2.815 12.36 22+22+22+22+50 14.0 0.790 4.080 1.78 1.78 1.78 1.78 4.88 12.0...
  • Page 59 Outdoor unit Power Heating capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Unit E Total (kW) 1.14 1.14 1.29 4.04 4.39 12.0 2.805 12.32 22+22+25+35+60 14.0 0.780 4.100 1.72 1.72 1.96 3.30 3.30 12.0...
  • Page 60 Outdoor unit Power Heating capacity (kW) Indoor units Current power consumption factor combination Unit A Unit B Unit C Unit D Unit E Total (kW) 1.64 2.59 2.59 2.59 2.59 12.0 2.820 12.38 22+35+35+35+35 14.0 0.780 4.100 1.55 2.49 2.49 2.49 2.98 12.0...
  • Page 61: Specification

    SPECIFICATION Outdoor model MXZ-2A30VA Single phase Outdoor unit power supply 230 V, 50 Hz Indoor units number Piping total length Max. 20 Connecting pipe length Max. 15 Height difference (Indoor ~ Outdoor) Refer to 9 Height difference (Indoor ~ Indoor) Refer to 9 Function Cooling...
  • Page 62 MXZ-2A40VA - Outdoor model MXZ-2A40VA - Single phase Single phase Outdoor unit power supply 230 V, 50 Hz 230 V, 50 Hz Indoor units number Piping total length Max. 30 Max. 30 Connecting pipe length Max. 20 Max. 20 Height difference (Indoor ~ Outdoor) Refer to 9 Refer to 9 Height difference (Indoor ~ Indoor)
  • Page 63 MXZ-2A52VA MXZ-3A54VA Outdoor model Single phase Single phase Outdoor unit power supply 230 V, 50 Hz 230 V, 50 Hz Indoor units number 2 to 3 Piping total length Max. 30 Max. 50 Connecting pipe length Max. 20 Max. 25 Height difference (Indoor ~ Outdoor) Refer to 9 Refer to 9...
  • Page 64 Outdoor model MXZ-4A71VA MXZ-4A80VA Single phase Single phase Outdoor unit power supply 230 V, 50 Hz 230 V, 50 Hz Indoor units number 2 to 4 2 to 4 Piping total length Max. 60 Max. 70 Connecting pipe length Max. 25 Max.
  • Page 65 Outdoor model MXZ-5A100VA Single phase Outdoor unit power supply 230 V, 50 Hz Indoor units number 2 to 5 Piping total length Max. 80 Connecting pipe length Max. 25 Height difference (Indoor ~ Outdoor) Refer to 9 Height difference (Indoor ~ Indoor) Refer to 9 Cooling Heating...
  • Page 66: Noise Criteria Curves

    NOISE CRITERIA CURVES MXZ-2A30VA MXZ-2A40VA FAN SPEED FUNCTION SPL(dB LINE FAN SPEED FUNCTION SPL(dB LINE High Cooling High Cooling High Heating High Heating NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 APPROXIMATE APPROXIMATE THRESHOLD OF THRESHOLD OF HEARING FOR NC-20 HEARING FOR NC-20...
  • Page 67 MXZ-4A71VA MXZ-4A80VA FAN SPEED FUNCTION SPL(dB LINE FAN SPEED FUNCTION SPL(dB LINE High Cooling High Cooling High Heating High Heating NC-70 NC-70 NC-60 NC-60 NC-50 NC-50 NC-40 NC-40 NC-30 NC-30 APPROXIMATE APPROXIMATE THRESHOLD OF THRESHOLD OF HEARING FOR NC-20 HEARING FOR NC-20 CONTINUOUS CONTINUOUS...
  • Page 68: Outlines And Dimensions

    OUTLINES AND DIMENSIONS MXZ-2A30VA Unit: mm MXZ-2A40VA MXZ-2A52VA REQUIRED SPACE Basically open 100mm or more without any obstruction in front and on both sides of the unit. Drainage hole Air in Open two sides of left, Air out right, or rear side. 2-10x21 Oval hole 22.3 handle...
  • Page 69 MXZ-3A54VA - Unit: mm REQUIRED SPACE Open as a rule More than 500 mm if the front and both sides are open More than 100 mm More than 200 mm if there are obstacles to both sides More than 100 mm Open as a rule 63.2 233.1...
  • Page 70 MXZ-3A54VA - Unit: mm 63.2 233.1 Air in Air in 3- 33 Drain hole Air out 4-10 x 21 Oval hole (Base bolt M10) 27.1 Indoor and outdoor connect wiring 39 x 27 hole 66.3 Gas pipe 9.52(flared)3/8 C unit connection B unit connection A unit connection Liquid pipe...
  • Page 71 MXZ-4A71VA - Unit: mm REQUIRED SPACE Open as a rule More than 500 mm if the front and both sides are open More than 100 mm More than 200 mm if there are obstacles to both sides More than 100 mm Open as a rule More than 500 mm if the back, both sides...
  • Page 72 MXZ-4A71VA - Unit: mm 63.2 233.1 Air in Air in 3- 33 Drain hole Air out 4-10 x 21 Oval hole (Base bolt M10) 27.1 Indoor and outdoor Gas pipe 66.3 connect wiring 9.52(flared)3/8(B,C,D unit) 39 x 27 hole 12.7(flared)1/2(A unit) D unit connection C unit connection B unit connection...
  • Page 73 MXZ-4A80VA - Unit: mm (200) 2-U-shape notched holes (Base bolt M10) Air in Air in Air out Drainage holes 3- 33 2-12 x 36 Oval hole Gas pipe (Base bolt M10) 9.52(flared)3/8(B,C,D unit) 12.7(flared)1/2(A unit) Indoor and outdoor connect wiring 26 x 45 hole D unit connection C unit connection...
  • Page 74 MXZ-4A80VA - MXZ-5A100VA Unit: mm 2-U Shaped notched hole (Base bolt M10) Air in Air in 3- 33 Drain hole Air out Gas pipe 2-12 x 36 Oval hole 9.52(flared) 3/8 (B,C,D,E (MXZ-5A100VA) unit) (Base bolt M10) 12.7(flared) 1/2 (A unit) Handle Indoor and Handle...
  • Page 75: Wiring Diagram

    WIRING DIAGRAM MXZ-2A30VA MXZ-2A40VA MXZ-2A52VA...
  • Page 76 MXZ-3A54VA - CN903 CN902...
  • Page 77 MXZ-3A54VA -...
  • Page 78 MXZ-3A54VA -...
  • Page 79 MXZ-3A54VA -...
  • Page 80 MXZ-4A71VA - CN903 CN902...
  • Page 81 MXZ-4A71VA -...
  • Page 82 MXZ-4A71VA -...
  • Page 83 MXZ-4A71VA -...
  • Page 84 MXZ-4A80VA -...
  • Page 85 MXZ-4A80VA -...
  • Page 86 MXZ-5A100VA...
  • Page 87: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM MXZ-2A30VA UNIT: mm Compressor Discharge R.V. coil temperature Refrigerant flow in cooling thermistor RT62 Refrigerant flow in heating Muffler Indoor unit 4-way valve Stop valve (with service port) Indoor unit Outdoor heat Stop valve exchanger (with service port) temperature thermistor FAN-OUT...
  • Page 88: Max Refrigerant Piping Length

    MXZ-2A40VA - MXZ-2A52VA UNIT: mm Compressor Discharge R.V. coil temperature Refrigerant flow in cooling thermistor RT62 Refrigerant flow in heating Muffler Indoor unit 4-way valve Stop valve (with service port) Indoor unit Outdoor heat Stop valve exchanger (with service port) temperature thermistor RT68...
  • Page 89 MXZ-2A40VA - UNIT: mm Compressor Discharge R.V. coil temperature Refrigerant flow in cooling thermistor RT62 Refrigerant flow in heating Muffler Indoor unit 4-way valve Stop valve (with service port) Indoor unit Outdoor heat Stop valve exchanger (with service port) temperature thermistor FAN-OUT RT68...
  • Page 90 MXZ-3A54VA - UNIT: mm Compressor Discharge R.V. coil temperature Refrigerant flow in cooling thermistor RT62 Oil separator Refrigerant flow in heating Capillary tube Ball valve with Indoor unit service port 4-way valve Indoor unit Muffler Indoor unit Outdoor heat exchanger temperature FAN-OUT thermistor...
  • Page 91 MXZ-3A54VA - UNIT: mm Compressor Discharge R.V. coil temperature Refrigerant flow in cooling thermistor RT62 Oil separator Refrigerant flow in heating Capillary tube Indoor unit Stop valve with 4-way valve service port Indoor unit Muffler Indoor unit Outdoor heat exchanger temperature FAN-OUT thermistor...
  • Page 92 MXZ-4A71VA - UNIT: mm Compressor Discharge R.V. coil temperature Refrigerant flow in cooling thermistor RT62 Refrigerant flow in heating Oil separator Capillary tube Indoor unit Ball valve with service port 4-way valve Indoor unit Indoor unit Muffler Indoor unit Outdoor heat exchanger temperature FAN-OUT...
  • Page 93 UNIT: mm MXZ-4A71VA - Compressor Discharge R.V. coil temperature Refrigerant flow in cooling thermistor RT62 Refrigerant flow in heating Oil separator Capillary tube Indoor unit Stop valve with 4-way valve service port Indoor unit Indoor unit Muffler Indoor unit Outdoor heat exchanger temperature FAN-OUT...
  • Page 94 MXZ-4A80VA - UNIT: mm Compressor Discharge High-pressure R.V. coil temperature switch Refrigerant flow in cooling thermistor RT62 Refrigerant flow in heating Oil separator Capillary tube Ball valve with Indoor unit service port 4-way valve Indoor unit Muffler Indoor unit Indoor unit Outdoor Ambient heat...
  • Page 95 MXZ-4A80VA - UNIT: mm Compressor High-pressure switch Discharge R.V. coil temperature Refrigerant flow in cooling thermistor RT62 Refrigerant flow in heating Oil separator Capillary tube Indoor unit Stop valve (with service port) 4-way valve Indoor unit Indoor unit Muffler Indoor unit Outdoor Ambient heat...
  • Page 96 UNIT: mm MXZ-5A100VA Compressor High-pressure Discharge R.V. coil switch temperature Refrigerant flow in cooling thermistor RT62 Refrigerant flow in heating Oil separator Capillary tube Indoor unit Stop valve (with service port) 4-way valve Indoor unit Indoor unit Muffler Indoor unit Indoor unit Outdoor Ambient...
  • Page 97: Performance Curves

    PERFORMANCE CURVES MXZ-2A30VA MXZ-3A54VA MXZ-5A100VA MXZ-2A40VA MXZ-4A71VA MXZ-2A52VA MXZ-4A80VA The standard specifications apply only to the operation of the air conditioner under normal conditions. Since operating conditions vary according to the areas where these units are installed, the following information has been pro- vided to clarify the operating characteristics of the air conditioner under the conditions indicated by the performance curve.
  • Page 98 10-1. CAPACITY AND THE INPUT CURVES MXZ-2A30VA MXZ-2A40VA MXZ-2A52VA 10.6 Outdoor intake air Dry-bulb temperature (°C) Outdoor intake air Dry-bulb temperature (°C) 25.4 24.0 25.9 23.4 22.2 23.9 21.5 20.3 21.9 19.5 18.5 19.9 17.6 16.6 17.9 15.6 14.8 15.9 13.7 12.9 13.9...
  • Page 99 MXZ-4A80VA 10.6 13.1 13.7 17.0 11.9 12.4 15.4 10.8 11.3 13.9 10.1 12.5 11.1 Outdoor intake air Dry-bulb temperature (°C) Outdoor intake air Dry-bulb temperature (°C) 25.4 24.0 25.9 27.0 31.4 31.9 35.1 23.4 22.2 23.9 24.9 29.0 29.4 32.4 21.5 20.3 21.9...
  • Page 100 10-2. CAPACITY AND INPUT CORRECTION BY INVERTER OUTPUT FREQUENCY (OUTDOOR UNIT: MXZ-2A30VA/2A40VA - 1. 22-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity <HEAT>Total input Frequency Frequency Frequency Frequency 2. 25-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity <HEAT>Total input Frequency Frequency Frequency...
  • Page 101 (OUTDOOR UNIT: MXZ-2A40VA - , MXZ-2A52VA) 1. 22-class unit in single operation <HEAT>Capacity <HEAT>Total input <COOL>Capacity <COOL>Total input Frequency Frequency Frequency Frequency 2. 25-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity <HEAT>Total input Frequency Frequency Frequency Frequency 3. 35-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity...
  • Page 102 (OUTDOOR UNIT: MXZ-3A54VA) 1. 22-class unit in single operation <HEAT>Capacity <HEAT>Total input <COOL>Capacity <COOL>Total input Frequency Frequency Frequency Frequency 2. 25-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity <HEAT>Total input Frequency Frequency Frequency Frequency 3. 35-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity...
  • Page 103 (OUTDOOR UNIT: MXZ-4A71VA) 1. 22-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity <HEAT>Total input Frequency Frequency Frequency Frequency 2. 25-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity <HEAT>Total input Frequency Frequency Frequency Frequency 3. 35-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity...
  • Page 104 (OUTDOOR UNIT: MXZ-4A71VA) 4. 42-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity <HEAT>Total input Frequency Frequency Frequency Frequency 5. 50-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity <HEAT>Total input Frequency Frequency Frequency Frequency 6. 60-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity...
  • Page 105 (OUTDOOR UNIT: MXZ-4A80VA) 1. 22-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity <HEAT>Total input Frequency Frequency Frequency Frequency 2. 25-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity <HEAT>Total input Frequency Frequency Frequency Frequency 3. 35-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity...
  • Page 106 (OUTDOOR UNIT: MXZ-4A80VA) 4. 42-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity <HEAT>Total input Frequency Frequency Frequency Frequency 5. 50-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity <HEAT>Total input Frequency Frequency Frequency Frequency 6. 60-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity...
  • Page 107 (OUTDOOR UNIT: MXZ-5A100VA) 1. 22-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity <HEAT>Total input Frequency Frequency Frequency Frequency 2. 25-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity <HEAT>Total input Frequency Frequency Frequency Frequency 3. 35-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity...
  • Page 108 5. 50-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity <HEAT>Total input Frequency Frequency Frequency Frequency 6. 60-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity <HEAT>Total input Frequency Frequency Frequency Frequency 7. 71-class unit in single operation <COOL>Capacity <COOL>Total input <HEAT>Capacity <HEAT>Total input Frequency...
  • Page 109 10-3. TEST RUN OPERATION (How to operate fixed-frequency operation) 1. Press EMERGENCY OPERATION switch to COOL or HEAT mode (COOL : Press once, HEAT : Press twice). 2. Test run operation starts and continues to operate for 30 minutes. 3. Compressor operates at rated frequency. 4.
  • Page 110 MXZ-2A40VA - MXZ-2A52VA 22-class unit 25-class unit (MPa[Gauge]) (MPa[Gauge]) 30Hz 30Hz 30Hz 30Hz Ambient temperature ( ) Ambient temperature ( ) Ambient temperature ( ) Ambient temperature ( ) Ambient humidity (%) Ambient humidity (%) Ambient humidity (%) Ambient humidity (%) 35-class unit (MPa[Gauge]) 30Hz...
  • Page 111 MXZ-3A54VA MXZ-4A71VA MXZ-4A71VA 50-class unit 60-class unit (MPa[Gauge]) (MPa[Gauge]) 40Hz 40Hz 40Hz 40Hz Ambient temperature ( ) Ambient temperature ( ) Ambient temperature ( ) Ambient temperature ( ) Ambient humidity (%) Ambient humidity (%) Ambient humidity (%) Ambient humidity (%) MXZ-4A80VA 22-class unit 25-class unit...
  • Page 112 MXZ-4A80VA MXZ-5A100VA 22-class unit 71-class unit (MPa[Gauge]) (MPa[Gauge]) 24Hz 24Hz 24Hz 24Hz Ambient temperature ( ) Ambient temperature ( ) Ambient temperature ( ) Ambient temperature ( ) Ambient humidity (%) Ambient humidity (%) Ambient humidity (%) Ambient humidity (%) MXZ-5A100VA 35-class unit 25-class unit...
  • Page 113 HEAT operation Condition : Indoor Outdoor Dry bulb temperature (°C) 20.0 20.0 Wet bulb temperature (°C) 14.5 14.5 Operation : TEST RUN OPERATION (Refer to 10-3.) MXZ-2A40VA- MXZ-2A30VA MXZ-2A40VA- 22-class unit 25-class unit 35-class unit 48Hz 48Hz 48Hz Ambient temperature ( ) Ambient temperature ( ) Ambient temperature ( ) MXZ-2A40VA-...
  • Page 114 MXZ-4A80VA 22-class unit 25-class unit 35-class unit 42-class unit 32Hz 32Hz 32Hz 32Hz Ambient temperature ( ) Ambient temperature ( ) Ambient temperature ( ) Ambient temperature ( ) 50-class unit 60-class unit 71-class unit 32Hz 32Hz 32Hz Ambient temperature ( ) Ambient temperature ( ) Ambient temperature ( ) MXZ-5A100VA...
  • Page 115: Actuator Control

    ACTUATOR CONTROL MXZ-2A30VA MXZ-2A40VA MXZ-2A52VA MXZ-3A54VA MXZ-4A71VA MXZ-4A80VA MXZ-5A100VA Relation between main sensor and actuator Actuator Purpose Sensor Outdoor Reversing Compressor fan motor valve Discharge temperature thermistor Protection Indoor coil thermistor Defrosting Protection Defrost thermistor Defrosting Gas pipe temperature thermistor (MXZ-3A54VA- Control MXZ-4A71VA-...
  • Page 116: Service Functions

    SERVICE FUNCTIONS MXZ-2A30VA MXZ-2A40VA MXZ-2A52VA MXZ-3A54VA MXZ-4A71VA MXZ-4A80VA MXZ-5A100VA 12-1. LOCKING THE OPERATION MODE OF THE CONDITIONER (COOL, DRY, HEAT) Description of the function: With this function, you can lock the operation mode of the outdoor unit. Once the operation mode is locked to either COOL/DRY mode or HEAT mode, the air conditioner operates in that mode only.
  • Page 117 12-4. AUTO LINE CORRECTING Outdoor unit has an auto line correcting function which automatically detects and corrects improper wiring or piping. <MXZ-2A> Improper wiring or piping can be automatically detected when one indoor unit is operated in COOL mode for 30 minutes. When improper wiring or piping is detected, wiring lines are corrected (A to B/ B to A) with the software.
  • Page 118 The record of auto line correcting can be confirmed in the following way: Turn OFF the power supply. Turn ON the 4th Dip Switch of SW1 on the display P.C. board. Turn ON the power supply. Confirm the correction by the blinking of LED. Number of blinks Wiring line LED2 (Yellow)
  • Page 119 The record of auto line correcting can be confirmed in the following way: Press the switch for more than 5 sec. LED will show the record of auto correcting for about 30 sec. as shown in the table below: Number of blinks Wiring line LED1(Red) LED2(Yellow)
  • Page 120: Troubleshooting

    TROUBLESHOOTING MXZ-2A30VA MXZ-2A40VA MXZ-2A52VA MXZ-3A54VA MXZ-4A71VA MXZ-4A80VA MXZ-5A100VA 13-1. CAUTIONS ON TROUBLESHOOTING 1. Before troubleshooting, check the following: 1) Check the power supply voltage. 2) Check the indoor/outdoor connecting wire for miswiring. 2. Take care of the following during servicing 1) Before servicing the air conditioner, be sure to turn OFF the unit first with the remote controller, and after confirming the horizontal vane is closed, turn OFF the breaker and/or disconnect the power plug.
  • Page 121 2. Outdoor unit failure mode table MXZ-2A LED indication Upper or left lamp of Indoor/outdoor Abnormal point OPERATION INDICATOR Condition Correspondence (Outdoor P.C. board) unit failure mode (Failure mode / protection) lamp (Indoor unit) recall function LED 1 LED 2 None (Normal) Lighting Lighting Outdoor power system...
  • Page 122 LED indication Upper or left lamp of Indoor/outdoor Abnormal point Correspondence (Outdoor P.C. board) Condition OPERATION INDICATOR unit failure mode (Failure mode / protection) recall function lamp (Indoor unit) LED 1 LED 2 8 times Goes A short or open circuit is detected in •...
  • Page 123 MXZ-3A/4A/5A Upper or left lamp of LED indication Indoor/outdoor Abnormal point OPERATION INDICATOR (Outdoor P.C. board) Condition Correspondence unit failure mode (Failure mode / protection) recall function lamp (Indoor unit) LED 1 LED 2 None (Normal) Lighting Lighting Outdoor power system 2-time flash Lighting Lighting Overcurrent protection stop is...
  • Page 124 LED indication Upper or left lamp of Indoor/outdoor Abnormal point Correspondence (Outdoor P.C. board) Condition OPERATION INDICATOR unit failure mode (Failure mode / protection) recall function lamp (Indoor unit) LED 1 LED 2 Communication error 11-time flash Communication error occurs Lighting 6 times •...
  • Page 125: Troubleshooting Check Table

    13-4. TROUBLESHOOTING CHECK TABLE MXZ-2A Indication Symptom Abnormal point / Condition Condition Correspondence LED1(Red) LED2(Yellow) Outdoor unit • Refer to 13-6 "Check of LEV". Lighting Once The indoor unit detects any abnormality in the LEV for drain. LEV for drain does not •...
  • Page 126 Indication No. Symptom Abnormal point / Condition Condition Correspondence LED1(Red) LED2(Yellow) Outdoor unit This symptom does not mean any abnormality of the operates. product, but check the following points. Cooling high-pressure Lighting 5 times The outdoor heat exchanger temperature exceeds 58°C during operation. •...
  • Page 127 MXZ-3A/4A/5A Indication Symptom Abnormal point / Condition Condition Correspondence LED1(Red) LED2(Yellow) Outdoor unit • Refer to 13-6. "Check of LEV". The indoor unit detects any abnormality in the LEV for drain. Lighting Once LEV for drain does not • Check the drain pump of the indoor unit. operate.
  • Page 128 Indication Symptom Abnormal point / Condition Condition Correspondence LED1(Red) LED2(Yellow) Outdoor unit The input current exceeds 15 A (MXZ-3A54VA, MXZ-4A71VA)/ These symptoms do not mean any abnormality of the Primary current protection operates. product, but check the following points. 17 A (MXZ-4A80VA)/18 A (MXZ-5A100VA) Once Lighting •...
  • Page 129 13-5. TROUBLE CRITERION OF MAIN PARTS MXZ-2A30VA MXZ-2A40VA MXZ-2A52VA MXZ-3A54VA MXZ-4A71VA MXZ-4A80VA MXZ-5A100VA Part name Check method and criterion Defrost thermistor (RT61) Measure the resistance with a tester. Fin temperature thermistor (RT64) Refer to 13-7. “Test point diagram and voltage”, 1. “Inverter P.C. board” , 2. “Outdoor Ambient temperature thermistor (RT65) electronic control P.C.
  • Page 130 13-6. TROUBLESHOOTING FLOW Outdoor unit does not operate. Check of power supply MXZ-2A30/2A40/2A52 Check the connecting of parts of main power supply circuit. Turn ON the power supply. Is there voltage of 230V AC in the Check the power supply cable. power supply terminal block? Is the output voltage from the power Is fuse (F61 or F64)
  • Page 131: Outdoor Unit Does Not Operate

    • When unit cannot operate neither by the remote controller nor by EMERGENCY OPERATION switch. Indoor unit does not operate. • When OPERATION INDICATOR lamp flashes ON and OFF in every 0.5-second. Outdoor unit does not operate. How to check mis-wiring and serial signal error (when outdoor unit does not work) LED indication for communication status Communication status is indicated...
  • Page 132 The cooling operation or heating operation does not operate. Check of R.V. coil MXZ-2A MXZ-3A/4A/5A CN912 Noise filter P.C. board Power P.C. board CN781 Outdoor electronic control P.C. board CN933 Inverter P.C. board • When heating operation does not work. 1.
  • Page 133 • When cooling, heat exchanger of non-operating indoor unit frosts. • When heating, non-operating indoor unit gets warm. Check of LEV Turn ON the power supply to the outdoor unit after checking LEV coil is mounted to the LEV body securely. Is "click - click"...
  • Page 134 • When heating, room does not get warm. • When cooling, room does not get cool. How to check inverter/ compressor Disconnect the terminal of the compressor. 3 minutes after turning ON the power supply, start EMERGENCY OPERATION. 1 After the outdoor fan starts running, wait for 1 minute or more before measuring the voltage.
  • Page 135 • When thermistor is abnormal. Check of outdoor thermistors Replace the thermistor except RT64. In case that RT64 is abnormal, Disconnect the connector in the following table and measure Abnormal replace the inverter P.C. board or the resistance of the thermistor to check whether the thermistor the outdoor power board since RT64 is normal or not.
  • Page 136 • Fan motor does not operate or stops operating shortly after starting the operation. Check of outdoor fan motor Disconnect CN932 from the inverter P.C. board or the outdoor electronic control P.C. board, and measure the resistance of the outdoor fan motor. Is the resistance of outdoor fan motor normal? (Refer to 13-5.) Turn ON the power supply.
  • Page 137 • When the operation frequency does not go up from lowest frequency. Check of HPS MXZ-4A80VA/5A100VA 1. Disconnect the connector CN681 in the electronic control P.C. board. 2. Check the resistance of HPS 1 minute after the outdoor unit power supply was turned OFF. Infinity Check the resistance between Replace HPS.
  • Page 138 13-7. TEST POINT DIAGRAM AND VOLTAGE 1. Inverter P.C. board MXZ-2A30VA MXZ-2A40VA MXZ-2A52VA 8V DC Back side of unit 230V AC FUSE(F801) FUSE(F901) T3.15AL250V T3.15AL250V Input 325V DC 5V DC 12V DC JK,JGO interface P.C. board (CN937) Output to drive compressor LEV A (LDW,...
  • Page 139 Defrost thermistor (RT61) 2. Outdoor electronic control P.C. board Ambient temperature thermistor (RT65) Gas pipe temperature thermistor (RT6A, 6B, 6C, 6D) MXZ-3A54VA MXZ-4A71VA MXZ-4A80VA - (Except MXZ-3A54VA- E4 , E5 , E6 , E7 and MXZ-4A71VA- E4 , E5 , E6 , E7 .) Outdoor heat exchanger temperature thermistor (RT68) Discharge temperature thermistor (RT62) 100 110 120...
  • Page 140 MXZ-4A80VA - MXZ-5A100VA Defrost thermistor (RT61) Ambient temperature thermistor (RT65) Outdoor heat exchanger temperature thermistor (RT68) Discharge temperature thermistor (RT62) 100 110 120 Temperature (°C) Temperature (°C) LED 1 LED 2 LED 3 CN641 Serial signal Room E F931 (MXZ-5A100VA) FUSE 12~24V DC T3.15AL250V...
  • Page 141 3. Noise filter P.C. board MXZ-3A54VA - MXZ-4A71VA - MXZ-4A80VA - CN901 To electronic CN902 CN903 control To power To power P.C. board board board 230V AC Input CN912 R.V. coil 230V AC CN61 230V AC 230V AC Output Output NR64 VARISTOR F64 FUSE F911 FUSE...
  • Page 142 MXZ-4A80VA - MXZ-5A100VA CN901 To electronic CN912 control CN902 CN903 R.V. coil P.C. board To power 230V AC To power board board CN61 230V AC Output 230V AC Output FUSE T6.3AL250V FUSE T2AL250V 230V AC Input 4. Power P.C. board MXZ-2A30VA MXZ-2A40VA MXZ-2A52VA...
  • Page 143 5. Outdoor Power board Fin temperature thermistor (RT64) MXZ-3A54VA MXZ-4A71VA MXZ-4A80VA MXZ-5A100VA 10 20 30 40 50 60 70 80 Temperature (°C) 325-370V DC Connect to the compressor Output (Red) Voltage among phases: 5V to 180V (–) Connect to the earth (White) Connect to the controller board (+)1-5(–): Signal transmission...
  • Page 144 6. Display P.C. board MXZ-2A30VA MXZ-2A40VA MXZ-2A52VA To inverter P.C. board (CN936) LED1 LED2 7. Interface P.C. board MXZ-2A30VA MXZ-2A40VA MXZ-2A52VA To inverter P.C. board (CN938) Serial signal room A Serial signal 230V AC room B...
  • Page 145: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS <"Terminal with locking mechanism" Detaching points> The terminal which has the locking mechanism can be detached as shown below. There are two types ( Refer to (1) and (2)) of the terminal with locking mechanism. The terminal without locking mechanism can be detached by pulling it out. Check the shape of the terminal before detaching.
  • Page 146 OPERATING PROCEDURE PHOTOS 2. Removing the inverter assembly, inverter P.C. board Photo 2 and power P.C. board (1) Remove the top panel, cabinet and service panel (Refer to 1). (2) Disconnect the power supply and indoor/outdoor connecting wire and remove the back panel (Refer to 1). Screws of the Inverter (3) Disconnect the earth wires, the lead wire to the reactor and...
  • Page 147 OPERATING PROCEDURE PHOTOS 5. Removing outdoor fan motor Photo 5 (1) Remove the top panel, cabinet and service panel Outdoor heat (Refer to 1). exchanger (2) Disconnect the power supply and indoor/outdoor temperature thermistor connecting wire. (3) Disconnect the connectors for outdoor fan motor. (4) Remove the propeller nut.
  • Page 148 14-2. MXZ-3A54VA - MXZ-4A71VA - OPERATING PROCEDURE PHOTOS 1. Removing the compressor Photo 1 Screws of the (1) Remove the screws of the top panel, and remove the top top panel panel. (2) Remove the screws of the service panel, and remove the service panel.
  • Page 149 OPERATING PROCEDURE PHOTOS Photo 3 Screw of the rear guard Screw of the back panel R.V. coil Photo 5 4 way valve Screws of the back panel LEV coil E Expansion valve E Suction pipe Screws of welded part the back panel Screw of the back panel Discharge...
  • Page 150 OPERATING PROCEDURE PHOTOS 3. Removing the 4-way valve Photo 7 (1) Remove the top panel (Photo 1). (2) Remove the service panel, the cabinet, and the back panel (Photo 1, 2, 3). 4 way valve (3) Recover gas from the refrigerant circuit. NOTE: Recover gas from the pipes until the pressure gauge shows 0 kg/cm...
  • Page 151 14-3. MXZ-3A54VA - MXZ-4A71VA - OPERATING PROCEDURE PHOTOS 1. Removing the compressor Photo 1 Screws of the (1) Remove the screws of the top panel, and remove the top top panel panel. (2) Remove the screws of the service panel, and remove the service panel.
  • Page 152 OPERATING PROCEDURE PHOTOS Photo 3 Screw of the rear guard Screw of the back panel R.V. coil Photo 5 4 way valve Screws of the back panel LEV coil E Expansion valve E Suction pipe Screws of welded part the back panel Screw of the Discharge back panel...
  • Page 153 OPERATING PROCEDURE PHOTOS 4. Removing the 4-way valve Photo 7 (1) Remove the top panel (Photo 1). (2) Remove the service panel, the cabinet, and the back panel (Photo 1, 2, 3). (3) Recover gas from the refrigerant circuit. 4 way valve NOTE: Recover gas from the pipes until the pressure gauge shows 0 kg/cm...
  • Page 154 14-4. MXZ-4A80VA - OPERATING PROCEDURE PHOTOS 1. Removing the compressor Photo 1 Screws of the top panel (1) Remove the screws of the top panel, and remove the top panel. (2) Remove the screws of the service panel, and remove the service panel.
  • Page 155 OPERATING PROCEDURE PHOTOS Photo 4 2. Removing the fan motor (1) Remove the top panel, the service panel, and the front panel (Photo 1). Screws of the outdoor fan motor (2) Disconnect the connector CN931 and CN932 on the outdoor electronic control P.C.
  • Page 156 OPERATING PROCEDURE PHOTOS 5. Removing the reactor Photo 7 (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 157 14-5. MXZ-4A80VA - MXZ-5A100VA OPERATING PROCEDURE PHOTOS 1. Removing the compressor Photo 1 (1) Remove the screws of the top panel, and remove the top Screws of the top panel panel. (2) Remove the screws of the service panel, and remove the service panel.
  • Page 158 OPERATING PROCEDURE PHOTOS Photo 5 2. Removing the fan motor Screws of the outdoor fan motor (1) Remove the top panel, the service panel, and the front panel (Photo 1). (2) Disconnect the connector CN931 and CN932 on the outdoor electronic control P.C.
  • Page 159 OPERATING PROCEDURE PHOTOS 5. Removing the reactor Photo 8 (1) Remove the top panel (Photo 1). (2) Disconnect the reactor lead wire. (3) Remove the screws of the reactor, and remove the reactor. Screws of the reactor...
  • Page 160: Parts List

    PARTS LIST (non-RoHS compliant) MXZ-2A40VA - MXZ-2A52VA - 15-1. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS...
  • Page 161 PARTS LIST (non-RoHS compliant) MXZ-2A40VA - MXZ-2A52VA - 15-1. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. Symbol Q'ty/unit in Wiring Part No. Part Name Remarks MXZ-2A40VA- MXZ-2A52VA- Diagram E02 927 232 CABINET E02 927 521 GRILLE...
  • Page 162 PARTS LIST (non-RoHS compliant) MXZ-2A40VA - MXZ-2A52VA - 15-2. OUTDOOR UNIT ELECTRICAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol in Wiring Part No. Part Name Remarks MXZ-2A40VA- MXZ-2A52VA- Diagram REACTOR 10A 23mH E02 838 337 E02 A47 440 POWER P.C.
  • Page 163 PARTS LIST (non-RoHS compliant) MXZ-2A40VA - MXZ-2A52VA - 15-3. DRAIN SOCKET Outdoor unit 42 drain hole Soft vinyl chloride hose of 25 mm inside diameter Q'ty/unit Symbol in Wiring Parts No. Parts Name Remarks MXZ-2A40VA- MXZ-2A52VA- Diagram DRAIN SOCKET E02 838 704...
  • Page 164 PARTS LIST (non-RoHS compliant) MXZ-3A54VA - MXZ-4A71VA - 15-4. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS 5 6 7 8...
  • Page 165 PARTS LIST (non-RoHS compliant) MXZ-3A54VA - MXZ-4A71VA - 15-4. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol MXZ-3A54VA- MXZ-4A71VA- in Wiring Parts No. Parts Name Remarks Diagram CABINET E02 939 232 E02 817 009 HANDLE...
  • Page 166 PARTS LIST (non-RoHS compliant) MXZ-3A54VA - MXZ-4A71VA - 15-5. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS 15-6. ACCESSORY...
  • Page 167 PARTS LIST (non-RoHS compliant) MXZ-3A54VA - MXZ-4A71VA - 15-5. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol in Wiring MXZ-3A54VA- MXZ-4A71VA- Parts No. Parts Name Remarks Diagram E02 851 501 PROPELLER RC0J60- E02 938 301...
  • Page 168 PARTS LIST (non-RoHS compliant) MXZ-4A80VA - 15-7. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS 7 8 9 10...
  • Page 169 PARTS LIST (non-RoHS compliant) MXZ-4A80VA - 15-7. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol in Wiring Parts No. Parts Name Remarks MXZ-4A80VA- Diagram M21 TK0 232 FRONT PANEL M21 TK0 027 HANDLE ASSEMBLY M21 TK5 010...
  • Page 170 PARTS LIST (non-RoHS compliant) MXZ-4A80VA - 15-8. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS 15-9. ACCESSORY...
  • Page 171 PARTS LIST (non-RoHS compliant) MXZ-4A80VA - 15-8. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol in Wiring Parts No. Parts Name Remarks MXZ-4A80VA- Diagram M21 TK0 501 PROPELLER M21 TK0 301 PM8H60- OUTDOOR FAN MOTOR...
  • Page 172: Rohs Parts List

    RoHS PARTS LIST (RoHS compliant) MXZ-2A30VA - MXZ-2A40VA - MXZ-2A52VA - 16-1. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS...
  • Page 173 RoHS PARTS LIST (RoHS compliant) MXZ-2A30VA - MXZ-2A40VA - MXZ-2A52VA - 16-1. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. Symbol Q'ty/unit in Wiring Remarks Part No. Part Name MXZ-2A30VA- MXZ-2A40VA- MXZ-2A52VA- Diagram E12 927 232...
  • Page 174 RoHS PARTS LIST (RoHS compliant) MXZ-2A30VA - MXZ-2A40VA - MXZ-2A52VA - 16-2. OUTDOOR UNIT ELECTRICAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol in Wiring Part No. Part Name MXZ-2A30VA- MXZ-2A40VA- MXZ-2A52VA- Remarks Diagram E12 838 337 REACTOR 10A 23mH...
  • Page 175 RoHS PARTS LIST (RoHS compliant) MXZ-2A30VA - MXZ-2A40VA - MXZ-2A52VA - 16-3. DRAIN SOCKET Outdoor unit 42 drain hole Soft vinyl chloride hose of 25 mm inside diameter Q'ty/unit Symbol MXZ-2A30VA- MXZ-2A40VA- MXZ-2A52VA- in Wiring Parts No. Parts Name Remarks Diagram DRAIN SOCKET E12 838 704...
  • Page 176 RoHS PARTS LIST (RoHS compliant) MXZ-3A54VA - MXZ-4A71VA - 16-4. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS 5 6 7 8...
  • Page 177 RoHS PARTS LIST (RoHS compliant) MXZ-3A54VA - MXZ-4A71VA - 16-4. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol MXZ-3A54VA- MXZ-4A71VA- in Wiring Parts No. Parts Name Remarks Diagram E12 939 232 CABINET HANDLE...
  • Page 178 RoHS PARTS LIST (RoHS compliant) MXZ-3A54VA - MXZ-4A71VA - 16-5. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS 16-6. ACCESSORY...
  • Page 179 RoHS PARTS LIST (RoHS compliant) MXZ-3A54VA - MXZ-4A71VA - 16-5. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol in Wiring MXZ-3A54VA- MXZ-4A71VA- Parts No. Parts Name Remarks Diagram E12 851 501 PROPELLER E12 938 301...
  • Page 180 RoHS PARTS LIST (RoHS compliant) MXZ-3A54VA - MXZ-4A71VA - 16-7. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS 6 7 8 9...
  • Page 181 RoHS PARTS LIST (RoHS compliant) MXZ-3A54VA - MXZ-4A71VA - 16-7. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol MXZ-3A54VA- MXZ-4A71VA- in Wiring Parts No. Parts Name Remarks Diagram E12 D36 232 CABINET HANDLE...
  • Page 182 RoHS PARTS LIST (RoHS compliant) MXZ-3A54VA - MXZ-4A71VA - 16-8. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS 16-9. ACCESSORY...
  • Page 183 RoHS PARTS LIST (RoHS compliant) MXZ-3A54VA - MXZ-4A71VA - 16-8. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol in Wiring MXZ-3A54VA- MXZ-4A71VA- Parts No. Parts Name Remarks Diagram E12 851 501 PROPELLER E12 938 301...
  • Page 184 RoHS PARTS LIST (RoHS compliant) MXZ-4A80VA - 16-10. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS 7 8 9 10...
  • Page 185 RoHS PARTS LIST (RoHS compliant) MXZ-4A80VA - 16-10. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol in Wiring Parts No. Parts Name Remarks MXZ-4A80VA- Diagram M21 L2V 232 FRONT PANEL M21 L2V 027 HANDLE ASSEMBLY...
  • Page 186 RoHS PARTS LIST (RoHS compliant) MXZ-4A80VA - 16-11. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS 16-12. ACCESSORY...
  • Page 187 RoHS PARTS LIST (RoHS compliant) MXZ-4A80VA - 16-11. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol in Wiring Parts No. Parts Name Remarks MXZ-4A80VA- Diagram M21 L2V 501 PROPELLER M21 L2V 301 OUTDOOR FAN MOTOR...
  • Page 188 RoHS PARTS LIST (RoHS compliant) MXZ-4A80VA - MXZ-5A100VA - 16-13. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS 7 8 9 10...
  • Page 189 RoHS PARTS LIST (RoHS compliant) MXZ-4A80VA - MXZ-5A100VA - 16-13. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol in Wiring Parts No. Parts Name Remarks MXZ-4A80VA- MXZ-5A100VA- Diagram M21 0A2 232 FRONT PANEL M21 0A2 027...
  • Page 190 RoHS PARTS LIST (RoHS compliant) MXZ-4A80VA - MXZ-5A100VA - 16-14. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS 16-15. ACCESSORY...
  • Page 191 RoHS PARTS LIST (RoHS compliant) MXZ-4A80VA - MXZ-5A100VA - 16-14. OUTDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS Part numbers that are circled are not shown in the illustration. Q'ty/unit Symbol in Wiring Parts No. Parts Name Remarks MXZ-4A80VA- MXZ-5A100VA- Diagram M21 L2V 501 PROPELLER M21 L2V 301...
  • Page 192: Optional Parts

    Punched hole MAC-855SG HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN Copyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO.,LTD Distributed in Dec. 2008. No.OB377 REVISED EDITION-H 6 Distributed in Sep. 2008. No.OB377 REVISED EDITION-G 6 Distributed in Dec. 2007. No.OB377 REVISED EDITION-F 8 Distributed in Aug.