Mitsubishi PU42EK72 User Manual

TECHNICAL & SERVICE MANUAL
SPLIT-TYPE, AIR CONDITIONERS
CONTENTS
1. FEATURES ························································2
2. TECHNICAL CHANGE······································3
3. COMBINATION OF INDOOR AND OUTDOOR UNITS ··············4
4. PART NAMES AND FUNCTIONS·····················4
5. SPECIFICATIONS ·············································5
6. DATA··································································6
7. OUTLINES AND DIMENSIONS ························9
8. WIRING DIAGRAM··········································13
9. REFRIGERANT SYSTEM DIAGRAM ···················18
10. MICROPROCESSOR CONTROL····················19
11. TROUBLESHOOTING ·····································21
12. DISASSEMBLY INSTRUCTIONS····················25
13. PARTS LIST·····················································29
<Outdoor unit>
Models
Outdoor unit
TM
PU12EK
PU18EK PU18EK
1
PU24EK PU24EK1 PU24EK2 PU24EK3
PU30EK PU30EK1 PU30EK2 PU30EK3
PU36EK PU36EK1 PU36EK2 PU36EK3
PU42EK2 PU42EK21
PU42EK7 PU42EK71 PU42EK72
No. OC247
REVISED EDITION-E
L
I
S
T
E
D
CUS
•Please void OC247 REVISED EDITION-D.
Revision:
•Wiring diagram for PU12EK has been modified in
”8. WIRING DIAGRAM”.
•Transformer and outdoor controller board for
PU12EK has been modified in ”13. PARTS LIST”.
Note:
•Refer to other manual as for Indoor Units.
Model name
indication
OC247-E--1.qxp 04.8.11 4:25 PM Page 1

Mitsubishi PU42EK72 Specifications

General

Refrigerant	R410A
Cooling Capacity	42000 BTU/h
Outdoor Unit Dimensions (W x H x D)	950 x 340 mm
Power Supply	220-240V, 50Hz
Indoor Unit Noise Level	45 dB

Summary

Features of Mitsubishi Electric Air Conditioners

Redi-charged Refrigerant System

Features a pre-charged refrigerant system reducing installation time and costs.

High Reliability and Easy Servicing

Units include self-diagnosis, time delay, and auto-restart for reliability.

Wiring Diagram and Service Notes

Important Servicing Cautions

Refrigerant System Diagrams

Microprocessor Control Functions

Protection Function

Details system protection mechanisms and error code displays.

Operational Control Logic

Switch Functions and Operation Modes

Troubleshooting Guide

Service Data Indication via Switches

Check Code Indication Details

Details how error codes are indicated and interpreted by LEDs.

Troubleshooting by Check Code

Lists causes and checks for specific error codes (LEDs).

Unit Not Working Troubleshooting

Troubleshooting steps when the outdoor unit fails to operate.

Component Checking Procedures

Disassembly Instructions

Electrical Parts Disassembly

Heat Exchanger & Compressor Disassembly