1-48
FM
I
LM
Y
BL
WH
BK
RD
5
4
3
2
1
CNU
F
250V
3.15A
ZNR
Printed circuit board
Power source
1 Phase 220/240V 50Hz
Wireless
R-Amp
Display
CNM
Y/GN
Y/GN
G
LB
BR
52C-4 52C-3 S 20S
52X1
52C
52X
1
PC
CNGCNHCNE
23D
52C
RD
OR
WH
BK
BL
RD
WH
BK
TH
1
TH
2
1
2
3
4
1
2
RD 63H
52X
A
52X
B
RD
WH
WH
BK
BK
WH
RD
RD
RD
RD
RD
BL
Cc
BL
BK
BK
BK
23
DH
51C
WH
BK
BK
RDOR
OR
OR
CF
0
20S
OR
ORRD
3
4
2
6
52X
B
CM
52X
A
FM0
( )
Indoor unit
Outdoor unit
Models SRK501HENF-L, 561HENF-L
Notes (1) ; denotes magentized relay ×: denotes demagnetized relay
(2) Th
1
is room temperature sensor. Th
2
(the heat exchanger sensor) is the hot start, hot keep, and frost prevention sensor. (for details, refer to pages 71, 72, 74)
Meaning of marks
Symbol Parts name Symbol Parts name
C
C
Capacitor for CM Th
1, 2
Thermistor
CF
O
Capacitor for FM
O
ZNR Varistor
CM Compressor motor 20S 4 way valve. coil
F Fuse 51C Motor protector for CM
FM
I
Fan motor (Indoor unit) 52C Magnetic contactor for CM
FM
O
Fan motor (Outdoor unit) 52X
A, B, 1
Auxiliary relay
LM Louver motor 63H High pressure switch
PC Photo coupler 23DH Thermostat (Defrost)
Table of relay operations
Operation
Cooling Heating Defrost
Relay symbol Control part
52X
1
20S ××
52X
A
FM
O
××
52X
B
××
52C CM
Color symbol
BK Black
BL Blue
BR Brown
RD Red
OR Orange
WH White
Y Yellow
LB Light blue
Y/GN Yellow/Green
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