Mitsubishi Electric PUMY-P48NKMU4 User Manual

TECHNICAL & SERVICE MANUAL
OUTDOOR UNIT
No. OCH811
REVISED EDITION-A
HFC
utilized
R410A
September 2023
Note:
•
Specifications have been
changed in REVISED
EDITION-A.
<Outdoor unit>
[Model Name]
Model name
indication
PARTS CATALOG (OCB811)
PUMY-P36NKMU4
PUMY-P48NKMU4
PUMY-P60NKMU4
PUMY-HP36NKMU2
PUMY-HP42NKMU2
PUMY-HP48NKMU2
PUMY-P36NKMU4
PUMY-P48NKMU4
PUMY-P60NKMU4
PUMY-HP36NKMU2
PUMY-HP42NKMU2
PUMY-HP48NKMU2
[Service Ref.]
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
CONTENTS
1. SAFETY PRECAUTION ·······················2
2. OVERVIEW OF UNITS ························5
3. SPECIFICATIONS ···························· 11
4. DATA ·············································· 14
5. OUTLINES AND DIMENSIONS ··········· 36
6. WIRING DIAGRAM ··························· 37
7. NECESSARY CONDITIONS
FOR SYSTEM CONSTRUCTION ········· 40
8. TROUBLESHOOTING ······················· 55
9. ELECTRICAL WIRING ·····················133
10. REFRIGERANT PIPING TASKS ·········139
11. DISASSEMBLY PROCEDURE ···········147
12. REMOTE CONTROLLER ··················168
OCH811 is void.

Mitsubishi Electric PUMY-P48NKMU4 Specifications

General

Brand	Mitsubishi Electric
Model	PUMY-P48NKMU4
Category	Air Conditioner
Language	English

Summary

Safety Precautions for Mitsubishi Electric Air Conditioners

Always Observe for Safety

General safety rules to follow before any maintenance or repair work.

Cautions Related to New Refrigerant R410A

Specific warnings and precautions for handling R410A refrigerant.

Detailed Specifications

Wiring Diagram

Necessary Conditions for System Construction

Troubleshooting

Checkpoints for Test Run

Pre-test run checks and safety procedures before operating the unit.

Countermeasures for Error During Test Run

Troubleshooting steps for specific error codes detected during test runs.

Self-Diagnosis Action by Flowchart

Flowcharts for diagnosing and resolving self-diagnosis errors.

Internal Switch Function Table

How to Check Parts

Procedures and specifications for checking the resistance of various components.

Electrical Wiring

Wiring of Main Power Supply and Equipment Capacity

Refrigerant Piping Tasks

Refrigerant Piping System

Disassembly Procedure

Remote Controller

Error Information

How to view and interpret error codes displayed on the remote controller.

Service Menu

Test Run

Error History

Self-Diagnosis

Procedures for performing self-diagnosis and checking unit attributes.

Remote Controller Check