Mitsubishi Electric MXZ-4C36NAHZ Technical & Service Manual
Split-type, heat pump air conditioners
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Also See for MXZ-4C36NAHZ:
- Technical & service manual (164 pages) ,
- Service manual (148 pages) ,
- Installation manual (52 pages)
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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
TECHNICAL & SERVICE MANUAL
[Model Name]
<Outdoor unit>
MXZ-4C36NAHZ
MXZ-5C42NAHZ
MXZ-8C48NAHZ
MXZ-8C48NA
MXZ-8C60NA
<Branch box>
PAC-MKA50BC
PAC-MKA30BC
PAC-MKA51BC
PAC-MKA31BC
OUTDOOR UNIT: MXZ-4C36NAHZ
BRANCH BOX: PAC-MKA51BC
[Service Ref.]
MXZ-4C36NAHZ
MXZ-4C36NAHZ-U1
MXZ-5C42NAHZ
MXZ-5C42NAHZ-U1
MXZ-8C48NAHZ
MXZ-8C48NAHZ-U1
MXZ-8C48NA
MXZ-8C48NA-U1
MXZ-8C60NA-U1
PAC-MKA50BC
PAC-MKA30BC
PAC-MKA51BC
PAC-MKA31BC
Model name
indication
CONTENTS
TECHNICAL CHANGES ......................................... 2
1. SAFETY PRECAUTION .................................... 3
2. OVERVIEW OF UNITS ...................................... 6
3. SPECIFICATIONS ............................................ 10
4. DATA ................................................................ 14
5. OUTLINES AND DIMENSIONS ...................... 36
6. WIRING DIAGRAM ......................................... 40
7. NECESSARY CONDITIONS FOR SYSTEM CONSTRUCTION .... 47
8. TROUBLESHOOTING .................................... 52
9. PRECAUTIONS AGAINST REFRIGERANT LEAKAGE .... 140
10. DISASSEMBLY PROCEDURE ...................... 141
PARTS CATALOG (OCB573)
HFC
utilized
R410A
February 2019
No. OCH573
REVISED EDITION-F
Revision:
• Some descriptions have
been modified in REVISED
EDITION-F.
OCH573 REVISED EDITION-E
is void.
Notes:
• This service manual
describes technical data of
outdoor unit and branch box.
As for indoor units, refer to
its service manual.
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Summary of Contents for Mitsubishi Electric MXZ-4C36NAHZ
- Page 1 5. OUTLINES AND DIMENSIONS ...... 36 6. WIRING DIAGRAM ......... 40 7. NECESSARY CONDITIONS FOR SYSTEM CONSTRUCTION ..47 8. TROUBLESHOOTING ........52 9. PRECAUTIONS AGAINST REFRIGERANT LEAKAGE ..140 OUTDOOR UNIT: MXZ-4C36NAHZ 10. DISASSEMBLY PROCEDURE ...... 141 PARTS CATALOG (OCB573) BRANCH BOX: PAC-MKA51BC...
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Page 2: Technical Changes
TECHNICAL CHANGES Service ref. have been changed as follows. MXZ-4C36NAHZ MXZ-4C36NAHZ-U1 MXZ-5C42NAHZ MXZ-5C42NAHZ-U1 MXZ-8C48NAHZ MXZ-8C48NAHZ-U1 MXZ-8C48NA MXZ-8C48NA-U1 • The shape of piping around a stop valve (T7W E04 410) has been changed. • The shape of valve bed has been changed. -
Page 3: Overview Of Units
100% and below 100%. 5 When the system includes 1 unit of ducted units, the number of the maximum connectable indoor units is decreased as follows: 3 for MXZ-4C36NAHZ-U1, 4 for MXZ-5C42NAHZ-U1, and 6 for MXZ-8C48NA(HZ)-U1 and MXZ-8C60NA-U1 OCH573F... - Page 4 8-8. TEST POINT DIAGRAM Outdoor multi controller circuit board MXZ-4C36NAHZ MXZ-5C42NAHZ MXZ-8C48NAHZ MXZ-8C48NA MXZ-4C36NAHZ-U1 MXZ-5C42NAHZ-U1 MXZ-8C48NAHZ-U1 MXZ-8C48NA-U1 MXZ-8C60NA-U1 <CAUTION> TEST POINT 1 is high voltage. CN51 External signal Model selection Pump down Test run Manual defrost Model selection output CN102 Connect to the M-P.B...
- Page 5 Brief Check of POWER MODULE Outdoor power circuit board If they are short-circuited, it means that they are broken. MXZ-4C36NAHZ Measure the resistance in the following points (connectors, etc.). MXZ-5C42NAHZ 1. Check of POWER MODULE MXZ-8C48NAHZ 1 Check of DIODE circuit...
- Page 6 M-NET power circuit board Connect to the outdoor multi MXZ-4C36NAHZ controller circuit board (CN102) 1–2: 24–30 V DC MXZ-5C42NAHZ 3–4: 24–30 V DC MXZ-8C48NAHZ MXZ-8C48NA MXZ-4C36NAHZ-U1 MXZ-5C42NAHZ-U1 MXZ-8C48NAHZ-U1 MXZ-8C48NA-U1 MXZ-8C60NA-U1 Connect to the electrical parts box Connect to the outdoor power circuit board (CNAC1) 1–3: 220–240 V AC...
- Page 7 8-9. INTERNAL SWITCH FUNCTION TABLE (1) Function of switches MXZ-4C36NAHZ(-U1) MXZ-5C42NAHZ(-U1) MXZ-8C48NAHZ(-U1) MXZ-8C48NA(-U1) MXZ-8C60NA-U1 ■ The black square ( ) indicates a switch position. Continue to the next page. OCH573F...