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TECHNICAL & SERVICE MANUAL
Indoor unit
[Model names] [Service Ref.]
PLFY-P12NBMU-E
PLFY-P15NBMU-E
PLFY-P18NBMU-E
PLFY-P24NBMU-E
PLFY-P30NBMU-E
PLFY-P36NBMU-E
No. OCH421
REVISED EDITION-A
CONTENTS
1. TECHNICAL CHANGES
.........................
2
2. FEATURES
.............................................
2
3. PART NAMES AND FUNCTIONS
..........
3
4. SPECIFICATIONS
...................................
5
5. 4-WAY AIR FLOW SYSTEM
...................
9
6. OUTLINES AND DIMENSIONS
............
12
7. WIRING DIAGRAM
...............................
13
8.
REFRIGERANT SYSTEM DIAGRAM
......
14
9. MICROPROCESSOR CONTROL
.........
15
10. TROUBLESHOOTING
.........................
22
11. DISASSEMBLY PROCEDURE
.............
31
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
PLFY-P
12NBMU-E
PLFY-P
12NBMU-ER1
PLFY-P
15NBMU-E
PLFY-P
15NBMU-ER1
PLFY-P
18NBMU-E
PLFY-P
18NBMU-ER1
PLFY-P
24NBMU-E
PLFY-P
24NBMU-ER1
PLFY-P
30NBMU-E
PLFY-P
30NBMU-ER1
PLFY-P
36NBMU-E
PLFY-P
36NBMU-ER1
Note:
• This manual does not cover
outdoor units.
When servicing them, please
refer to the outdoor unit’s
service manual.
• RoHS compliant products
have <G> mark on the spec
name plate.
November 2008
INDOOR UNIT
Model name
indication
PARTS CATALOG (OCB421)
R410A / R22
Revision:
• PLFY-P12/15/18/24/30/36
NBMU-ER1 are added in
REVISED EDITION-A.
• Some descriptions have
been modified.
• Plase void OCH421.