Panasonic 26PSU1U6 Tech Data - Service Manual - Page 139

Outdoor Unit Control PCB, Layout Diagram CR-CH4872R

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2-5 Outdoor Unit Control PCB (1) Layout Diagram (CR-CH4872R) 2. Processes and functions Suction temperature (TS) sensor Heat exchanger temperature (C1) sensor Heat exchanger temperature (C2) sensor MDC Outdoor air temperature (TO) sensor Compressor discharge temperature (TD) sensor EEPROM IC Refrigerant recovery switch (S005) Quiet mode plug (CN028) Refrigerant System address switch (S002) EXCT plug (CN026) Automatic address setting switch (S001) Snowfall sensor Refrigerant System address switch (S003) Cooling test Test pin (CN036) 2 Operation circuit fuse (F002) Serial 1 plug Power LED (D115) LED 1, 2 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) Fan motor plug (CN004) 2-9

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2-9
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)
2