4-2-13) When Cool Select Zone Damper Does Not Work (Applies Only To Models With Csz) - Samsung RB31FEJNB Series Service Manual

4. TROUBLESHOOTING
4-2-14) When Cool Select Zone Damper does not work (Applies only to models with CSZ)
MICOM & CSZ DAMPER STATE
MICOM
30 31
DAMPER
CLOSE 5V 0V
...ING 0V -
OPEN 5V 5V
* Note ; Its operations can change
based on its functions.
[Set lower than the current temp]
32 Remark
MICOM Pin #30,#31 and #32
0V
5V
0V
Start
DAMPER is under a
working condition.
Yes
CSZ temp satisfies the
set temp.
Yes
Shift Set Temp
MAIN PCB Connector
CN75 is inserted normal
Yes
Voltage is output from
Yes
DAMPER is normal
Yes
Normal
Replace PCB MAIN
78
No
Forced Operation, Temp Increased
No
Check Wiring & PCB MAIN
No
Check Connector CN75
No
Check Cold Solder, Replace PCB
No
Replace DAMPER