Mitsubishi PU36EK3

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 PU36EK3 Specifications

General

Brand	Mitsubishi
Model	PU36EK3
Category	Air Conditioner
Language	English

Summary

Features

Redi-Charged Refrigerant System

Specifications

Wiring Diagram

Refrigerant System Diagram

Microprocessor Control

Protection Function

Explains protection mechanisms and error code displays for unit safety and fault diagnosis.

Outdoor Coil Thermistor Control

Details how outdoor coil temperature affects fan speed and unit operation modes.

Fan Control

Explains phase-controlled fan speed adjustment based on outdoor temperature for efficient operation.

Switches on Outdoor Controller Board

Operation During Power-On-Reset

Details unit behavior and system checks performed upon initial power-up.

Troubleshooting

Service Data Indication

Explains how to use switches and LEDs to display service data and check codes for diagnostics.

Troubleshooting According to Check Code

Lists diagnostic check codes, their causes, and specific troubleshooting steps for malfunctions.

Outdoor Unit Not Working

Provides common causes and check points when the outdoor unit fails to operate correctly.

Wrong Wiring on Site

Remote Controller to Indoor Unit Wiring

Indoor to Outdoor Unit Wiring

Parts List

Structural Parts

Functional Parts (PU12 EK, PU18 EK, PU18 EK1)

Functional Parts (PU24 EK Series)

Functional Parts (PU30 EK Series)

Functional Parts (PU36 EK Series)

Functional Parts (PU42 EK2 Series)

Functional Parts (PU42 EK7 Series)