Mitsubishi Electric PUZ-A42NKA7 User Manual

1
SERVICE MANUAL
CONTENTS
1. REFERENCE MANUAL ································· 2
2. SAFETY PRECAUTION ································· 2
3. FEATURES ····················································· 7
4. SPECIFICATIONS ·········································· 8
5. DATA ····························································· 10
6. OUTLINES AND DIMENSIONS ··················· 14
7. WIRING DIAGRAM ······································ 17
8. WIRING SPECIFICATIONS ·························· 20
9. REFRIGERANT SYSTEM DIAGRAM ············· 21
10. TROUBLESHOOTING ·································· 24
11. EASY MAINTENANCE FUNCTION·············· 84
12. FUNCTION SETTING ··································· 87
13. MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER ·····95
14. DISASSEMBLY PROCEDURE ··················· 104
R410A
Outdoor unit
[Model Name]
PUZ-A12NKA7
PUZ-A18NKA7
PUZ-A24NHA7
PUZ-A30NHA7
PUZ-A36NKA7
PUZ-A42NKA7
PUZ-A12NKA7-BS
PUZ-A18NKA7-BS
PUZ-A24NHA7-BS
PUZ-A30NHA7-BS
PUZ-A36NKA7-BS
PUZ-A42NKA7-BS
PUY-A12NKA7
PUY-A18NKA7
PUY-A24NHA7
PUY-A30NHA7
PUY-A36NKA7
PUY-A42NKA7
PUY-A12NKA7-BS
PUY-A18NKA7-BS
PUY-A24NHA7-BS
PUY-A30NHA7-BS
PUY-A36NKA7-BS
PUY-A42NKA7-BS
[Service Ref.]
PUZ-A12NKA7
PUZ-A18NKA7
PUZ-A24NHA7
PUZ-A30NHA7
PUZ-A36NKA7
PUZ-A42NKA7
PUZ-A12NKA7-BS
PUZ-A18NKA7-BS
PUZ-A24NHA7-BS
PUZ-A30NHA7-BS
PUZ-A36NKA7-BS
PUZ-A42NKA7-BS
PUY-A12NKA7
PUY-A18NKA7
PUY-A24NHA7
PUY-A30NHA7
PUY-A36NKA7
PUY-A42NKA7
PUY-A12NKA7-BS
PUY-A18NKA7-BS
PUY-A24NHA7-BS
PUY-A30NHA7-BS
PUY-A36NKA7-BS
PUY-A42NKA7-BS
PUZ-A12/18NKA7
PUY-A12/18NKA7
PARTS CATALOG (OCB636)
Notes:
•Thismanualdescribesservice
dataoftheoutdoorunitsonly.
• RoHScompliantproductshave
<G> markonthespecname
plate.
SPLIT-TYPE,HEATPUMPAIRCONDITIONERS
SPLIT-TYPE,AIRCONDITIONERS
February 2017
No. OCH636
REVISED EDITION-A
Revision:
•
CorrectedtheSHFvaluein
"5-4.STANDARDOPERATION
DATA"inREVISEDEDITION-A.
• Somedescriptionshavebeen
modified.
• OCH636 isvoid.

Mitsubishi Electric PUZ-A42NKA7 Specifications

General

Heating Capacity	5.0 kW
Power Supply	220-240 V, 50 Hz
Refrigerant	R32
Outdoor Unit Dimensions (HxWxD)	550 x 800 x 285 mm
Outdoor Unit Noise Level	49 dB(A)
Outdoor Unit Dimensions (WxHxD)	800 x 550 x 285 mm

Summary

2 SAFETY PRECAUTION

2-1. ALWAYS OBSERVE FOR SAFETY

General safety guidelines and precautions for repair services.

4 SPECIFICATIONS

5 DATA

7 WIRING DIAGRAM

8 WIRING SPECIFICATIONS

8-1. INDOOR UNIT POWER SUPPLIED FROM OUTDOOR UNIT (A-control application)

Specifications for power supply and wiring between indoor and outdoor units in A-control applications.

9 REFRIGERANT SYSTEM DIAGRAM

Service Operations

Refrigerant collecting (pump down)

Steps for safely collecting refrigerant from the unit before moving or servicing.

Refrigerant pipe airtight testing method

Method for testing the airtightness of refrigerant piping to detect leaks.

Start and finish of test run

Procedures for starting and finishing unit test runs, including operation mode settings.

10 TROUBLESHOOTING

10-1. TROUBLESHOOTING

Guide to troubleshooting by check codes, addressing recurring and non-recurring issues.

10-2. CHECK POINT UNDER TEST RUN

10-6. HOW TO CHECK THE PARTS

10-7. HOW TO CHECK THE COMPONENTS

10-8. EMERGENCY OPERATION

10-9. TEST POINT DIAGRAM

10-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS

Display function of inspection for outdoor unit

(2) Abnormal condition

11 EASY MAINTENANCE FUNCTION

11-1. Smooth maintenance

13 MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER

13-1. HOW TO "MONITOR THE OPERATION DATA"

14 DISASSEMBLY PROCEDURE