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MICOM voltage
DOOR OPEN : 5V
DOOR CLOSE : 0V
Diagnostics
8-4) When FAN & DAMPER does not operate
"Check out the F-FAN with the Forced Operation selected"
1. Freezer FAN, Refrigerator DAMPER and COMP COOLING FAN remains off while COMP is turned off.
2. When Comp is ON, Damper does not always remain ON (including Forced Operaation) and when Refrigerator
temp reaches to set temp, Damper remains OFF.
3. When R-Room & Freezer get closeed after being opened, each Fan & Damper starts up immediately.
(Comp ON condition)
1) When Freezer FAN(F-FAN) does not operate
Start Forced Operation
Is it during
Forced Operation?
Start
NO
YES
Normal F-FAN
Does Fan operate with
DOOR S/W presses?
YES
YES
Change DOOR S/W
Is DOOR S/W normal?
NO
YES
Check soldering / Change PCB
Is voltage of MICOM
#49 normal?
NO
YES
Re-insert Connector CN71
Is insertion of
CN71(W/BLUE) of MAIN
PCB normal?
NO
YES
Check soldering / Change PCB
Is voltage of MICOM
Pin #34 "HIGH"(5V)?
NO
YES
Check soldering / Change PCB
Is IC3 #17 "LOW"?
NO
YES
Check RELAY / Change PCB
Is Freezer-Fan RELAY normal?
NO
YES
Re-insert Connector CN71
Is insertion of
CN71(BLUE) of MAIN PCB
normal?
NO
YES
Change or repair FAN
Is FAN ASS'Y normal?
NO
YES
Check wire assembly & connection status
Note