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II-9
SM831148
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2. Processes and functions
Fan motor plug (CN004)
EEPROM IC
MDC
Heat exchanger temperature (C2) sensor
Heat exchanger temperature (C1) sensor
Suction temperature (TS) sensor
Outdoor air temperature (TO) sensor
Compressor discharge temperature (TD) sensor
Refrigerant recovery switch
(S005)
Quiet mode plug (CN028)
EXCT plug (CN026)
Automatic address
setting switch (S001)
Snowfall sensor
Cooling test
Test pin (CN036)
Operation circuit fuse
(F002)
LED 1, 2
Serial 1 plug
Terminal plug (CN015)
Serial 2 plug
If the operation circuit fuse
(F002) has blown,
determine and correct the
cause for the blown fuse,
then change the socket
from the serial 1 plug to
the serial 2 plug.
Position detection plug
(CN003)
Refrigerant System
address switch (S002)
Refrigerant System
address switch (S003)
Power LED
(D115)
2-5 Outdoor Unit Control PCB
(1) Layout Diagram (CR-CH4872R)