Mitsubishi Electric PKFY-P12NLMU-E User Manual

TECHNICAL & SERVICE MANUAL
CONTENTS
1. SAFETY PRECAUTION
..........................
2
2. PARTS NAMES AND FUNCTIONS
........
4
3. SPECIFICATION
...................................
12
4. NOISE CRITERION CURVES
...............
15
5. OUTLINES AND DIMENSIONS
............
17
6. WIRING DIAGRAM
...............................
19
7. REFRIGERANT SYSTEM DIAGRAM
........
20
8. MICROPROCESSOR CONTROL
.........
20
9. TROUBLESHOOTING
..........................
27
10. DISASSEMBLY PROCEDURE
...........
35
Indoor unit
[Model Name] [Service Ref.]
INDOOR UNIT
R410A
Model name
indication
PARTS CATALOG (OCB715)
No. OCH715
March 2020
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
PKFY-P04NLMU-E
PKFY-P04NLMU-E.TH
PKFY-P06NLMU-E
PKFY-P06NLMU-E.TH
PKFY-P08NLMU-E
PKFY-P08NLMU-E.TH
PKFY-P12NLMU-E
PKFY-P12NLMU-E.TH
PKFY-P15NLMU-E
PKFY-P15NLMU-E.TH
PKFY-P18NLMU-E
PKFY-P18NLMU-E.TH
Note:
• This manual describes
service data of the indoor
units only.

Mitsubishi Electric PKFY-P12NLMU-E Specifications

General

Brand	Mitsubishi Electric
Model	PKFY-P12NLMU-E
Category	Air Conditioner
Language	English

Summary

1. Safety Precautions

2. Parts Names and Functions

3. Specifications

6. Wiring Diagram

8. Microprocessor Control

8-1. Cool Operation

Instructions for operating the indoor unit in COOL mode using the remote controller.

8-2. Dry Operation

Instructions for operating the indoor unit in DRY mode using the remote controller.

8-3. Fan Operation

Instructions for operating the indoor unit in FAN mode using the remote controller.

8-4. Heat Operation

Instructions for operating the indoor unit in HEAT mode using the remote controller.

8-5. Auto Operation [Automatic Cool/Heat Change Over Operation]

How to operate the unit in AUTO mode for automatic cooling/heating changeover.

9. Troubleshooting

9-1. How to Check the Parts

Procedures for checking the resistance and functionality of various internal parts.

9-2. Function of Dip Switch

Details the functions and settings of various DIP switches on the indoor controller board.

9-3. Test Point Diagram

10. Disassembly Procedure