Mitsubishi Electric MXZ-2A30VA - E1 User manual

SERVICE MANUAL
CONTENTS
1. TECHNICAL CHANGES ··································· 2
2. PART NAMES AND FUNCTIONS····················· 8
3. INDOOR/OUTDOOR
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
Models
MXZ-2A30VA -
E1
MXZ-4A71VA -
E2
MXZ-2A30VA -
E2
MXZ-4A71VA -
E3
MXZ-2A40VA -
E1
MXZ-4A71VA -
E4
MXZ-2A40VA -
E2
MXZ-4A71VA -
E5
MXZ-2A52VA -
E1
MXZ-4A71VA -
E6
MXZ-2A52VA -
E2
MXZ-4A71VA -
E7
MXZ-3A54VA -
E1
MXZ-4A80VA -
E1
MXZ-3A54VA -
E2
MXZ-4A80VA -
E2
MXZ-3A54VA -
E3
MXZ-5A100VA -
E1
MXZ-3A54VA -
E4
MXZ-3A54VA -
E5
MXZ-3A54VA -
E6
MXZ-3A54VA -
E7
MXZ-4A71VA -
E1
No. OB377
REVISED EDITION-H
HFC
utilized
R410A
SPLIT-TYPE AIR CONDITIONERS
MXZ-4A80VA-E1
Please void OB377 REVISED EDITION-G.
OUTDOOR UNIT
Revision H:
• Indoor units combinations for 42 class
have been added.
•
MXZ-3A54VA-
E7
and MXZ-4A71VA-
E7
have been added.
NOTE:
• RoHS compliant products have <G> mark on the spec
name plate.
For servicing of RoHS compliant products, refer to the
RoHS Parts List.
Indoor unit service manual
MSZ-FA•VA Series (OB371)
MSZ-GA•VA Series (OB378, OB388)
MSZ-CB•VA Series (OB441)
MSZ-GC•VA Series (OBH468)
MSZ-GE•VA Series (OBH515)
MSZ-FD•VA Series (OBH488)

TECHNICAL CHANGES
2
1
MXZ-A26WV - E1 MXZ-3A54VA - E1
1. Indication of capacity has been changed. (BTU kW)
2. Capacity specification has been changed. (Cooling capacity 7.1kW 5.4kW)
3. Dimensions of unit have been changed. (W900 H900 D320 W840 H710 D330)
4. Combinations of connectable indoor units have been changed.
5. Capacity class of connectable indoor units has been changed.
6. Communication system has been changed.
7. Power supply way has been changed (change to supply to outdoor unit).
8. Compressor has been changed. (TNB220FMCH SNB130FLDH1)
9. High-pressure switch has been removed.
10.Outdoor fan motor has been changed. (PM8H60-UA RC0J60-AA)
11.Evaporation temperature thermistor has been removed.
12.Ambient temperature thermistor has been added.
13.New dip switch has been added to the controller board for "Locking the operation "mode
and "Lowering the operating noise "mode.
14.A Quick Clean Kit has been added.
MXZ-A32WV - E1 MXZ-4A71VA - E1
1. Indication of capacity has been changed. (BTU kW)
2. Capacity specification has been changed. (Cooling capacity 8.0kW 7.1kW)
3. Dimensions of unit have been changed. (W900 H900 D320 W840 H710 D330)
4. Combinations of connectable indoor units have been changed.
5. Capacity class of connectable indoor units has been changed.
6. Communication system has been changed.
7. Power supply way has been changed (change to supply to outdoor unit).
8. Compressor has been changed. (TNB220FMCH SNB130FLDH1)
9. High-pressure switch has been removed.
10. Outdoor fan motor has been changed. (PM8H60-UA RC0J60-AA)
11. Evaporation temperature thermistor has been removed.
12. Ambient temperature thermistor has been added.
13. New dip switch has been added to the controller board for "Locking the operation "mode
and "Lowering the operating noise "mode.
14. A Quick Clean Kit has been added.
Revision A :
• MXZ-3A54VA- E1 and MXZ-4A71VA- E2 have been added.
Quick clean kit has been removed. (Refer to 2.)
• MXZ-2A40VA- E1 and MXZ-2A52VA- E2 have been added.
Revision B :
• MXZ-2A30VA- E1 and MXZ-2A40VA- E2 have been added.
• “Check of HPS” has been corrected.
• RoHS PARTS LIST has been added.
Revision C :
• MXZ-2A52VA- E2 ,MXZ-3A54VA- E3 ,MXZ-4A71VA- E3 ,MXZ-4A80VA- E2 and MXZ-5A100VA- E1 have been added.
Revision D:
• MXZ-3A54VA- E4 ,and MXZ-4A71VA- E4 have been added.
• The content of pre-heat control (12-3) has been corrected.
• 5. SPECIFICATION has been corrected.
Revision E:
• MXZ-2A30VA- E1 has been added.
• 4. INDOOR UNITS COMBINATION of MXZ-5A100VA- E2 has been changed.
Revision F:
• MXZ-3A54VA- E5 and MXZ-4A71VA- E5 have been added.
Revision G:
• MXZ-3A54VA- E6 and MXZ-4A71VA- E6 have been added.
Revision H:
• Indoor units combinations for 42 class have been added.
•
MXZ-3A54VA-
E7
and MXZ-4A71VA-
E7
have been added.

3
MXZ-A32WV - E1 MXZ-4A80VA - E1
1. Indication of capacity has been changed. (BTU kW)
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. New dip switch has been added to the controller board for "Locking the operation "mode
and "Lowering the operating noise "mode.
7. A Quick Clean Kit has been added.
MXZ-A14WV - E2 MXZ-2A40VA - E1
1. Indication of capacity has been changed. (BTU kW)
2. Dimensions of unit have been changed. (W840 H640 D330 W800 H550 D285)
3. Communication system has been changed.
4. Power supply way has been changed (change to supply to outdoor unit).
5. Compressor has been changed. (SNV092FJYH SNB130FKCH)
6. Outdoor fan motor has been changed. (RA6V49 RC0J50-CF)
7. Evaporation temperature thermistor has been removed.
8. Gas pipe temperature thermistor has been removed.
9. Ambient temperature thermistor has been added.
MXZ-A18WV - E2 MXZ-2A52VA - E1
1. Indication of capacity has been changed. (BTU kW)
2. Cooling capacity specification has been changed. (5.4 kW 5.2 kW)
3. Heating capacity specification has been changed. (6.6 kW 6.4 kW)
4. Dimensions of unit have been changed. (W840 H640 D330 W800 H550 D285)
5. Communication system has been changed.
6. Power supply way has been changed (change to supply to outdoor unit).
7. Compressor has been changed. (SNV092FJYH SNB130FKCH)
8. Outdoor fan motor has been changed. (RA6V49 RC0J50-CF)
9. Evaporation temperature thermistor has been removed.
10. Gas pipe temperature thermistor has been removed.
11. Ambient temperature thermistor has been added.
MXZ-3A54VA - E1 MXZ-3A54VA - E2
MXZ-4A71VA - E1 MXZ-4A71VA - E2
1. Quick clean kit has been removed.
MXZ-2A30VA - E1
1. New model
MXZ-2A40VA - E1 MXZ-2A40VA - E2
1. Compressor has been changed. (SNB130FKCH KNB092FEDH)
2. Outdoor heat exchanger has been changed.
MXZ-2A52VA - E1 MXZ-2A52VA - E2
1. Compressor has been changed. (SNB130FKCH SNB130FKMH)
2. Inverter P.C. board has been changed.

4
MXZ-3A54VA - E2 MXZ-3A54VA - E3
1. Compressor has been changed. (SNB130FLDH1 SNB130FLEH1)
2. Electronic control P.C. board has been changed.
MXZ-4A71VA - E2 MXZ-4A71VA - E3
1. Compressor has been changed. (SNB130FLDH1 SNB130FLEH1)
2. Electronic control P.C. board has been changed.
MXZ-4A80VA - E1 MXZ-4A80VA - E2
1. Ball valve has been changed to stop valve.
2. Gas pipe temperature thermistor has been removed.
3. Pre-heat control has been added.
4. Auto line correcting function has been added.
5. Noise filter P.C. board has been changed.
6. Electronic control P.C. board has been changed.
7. Weight has been changed. (70kg 67kg)
MXZ-5A100VA - E1
1. New model
MXZ-3A54VA - E3 MXZ-3A54VA - E4
1. Compressor has been changed. (SNB130FLEH1 SNB130FGBH1)
2. Electronic control P.C. board has been changed.
3. Gas pipe temperature thermistor has been removed.
4. Pre-heat control has been added.
5. Power board has been changed.
MXZ-4A71VA - E3 MXZ-4A71VA - E4
1. Compressor has been changed. (SNB130FLEH1 SNB130FGBH1)
2. Electronic control P.C. board has been changed.
3. Gas pipe temperature thermistor has been removed.
4. Pre-heat control has been added.
5. Power board has been changed.
MXZ-2A30VA - E1 MXZ-2A30VA - E2
1. Compressor has been changed. (KNB092FEDH KNB073FGDH)
2. Inverter P.C. board has been changed.
MXZ-3A54VA - E4 MXZ-3A54VA - E5
1. Electronic control P.C. board has been changed.
2. Noise filter P.C. board has been changed.
3. Ball valve has been changed to stop valve.
4. Sub panel has been added.
MXZ-4A71VA - E4 MXZ-4A71VA - E5
1. Electronic control P.C. board has been changed.
2. Noise filter P.C. board has been changed.
3. Ball valve has been changed to stop valve.
4. Sub panel has been added.
MXZ-3A54VA - E5 MXZ-3A54VA - E6
MXZ-4A71VA - E5 MXZ-4A71VA - E6
1. Electronic control P.C. board has been changed.
MXZ-3A54VA - E6 MXZ-3A54VA - E7
MXZ-4A71VA - E6 MXZ-4A71VA - E7
1. Electronic control P.C. board has been changed.
2. Compressor has been changed. (SNB130FGBH1 SNB130FGBH1T)

5
Refrigeration
oil Refrigerant
New refrigerant
R410A
HFC-32: HFC-125 (50%:50%)
Pseudo-azeotropic refrigerant
Not included
A1/A1
72.6
-51.4
1.557
64
Non combustible
0
1730
From liquid phase in cylinder
Possible
Incompatible oil
Non
Non
Previous refrigerant
R22
R22 (100%)
Single refrigerant
Included
A1
86.5
-40.8
0.94
44.4
Non combustible
0.055
1700
Gas phase
Possible
Compatible oil
Light yellow
Non
Refrigerant
Composition (Ratio)
Refrigerant handling
Chlorine
Safety group (ASHRAE)
Molecular weight
Boiling point (°C)
Steam pressure [25°C](Mpa)
Saturated steam density [25°C](Kg/m3)
Combustibility
ODP 1
GWP 2
Refrigerant charge method
Additional charge on leakage
Kind
Color
Smell
1 :Ozone Depletion Potential : based on CFC-11
2 :Global Warming Potential : based on CO2
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. Refer to the table below.
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.
For refrigerant piping, use clean, pressure-proof parts/materials specifically designed for R410A. (Refer to 2. Refrigerant
piping.)
Composition change may occur in R410A since it is a mixed refrigerant. When charging, charge liquid refrigerant to prevent
composition change.