Samsung RB215BSSB Service Manual - Page 62

When COMP COOLING FAN does not operate

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Diagnostics 3) When COMP COOLING FAN does not operate Start NO Is COMP operating? YES Is it COMP COOLING FAN ON condition? YES Operate Forced Operation NO Stand by for FAN ON condition Confirm FAN operating condition Ambient Temp Range Load Operation Status Higher than 71.6℉(22℃) Comp Fan operates immediately upon COMP ON Comp Between 62.6℉(17℃)~69.8℉(21℃) Comp Fan operates in 3 min after COMP ON Fan Between 53.6℉(12℃)~69.8℉(16℃) Comp Fan operates in 6 min after COMP ON DELAY Between 44.6℉(7℃)~51.8℉(11℃) Comp Fan operates in 9 min after COMP ON Lower than 42.8℉(6℃) Comp Fan gets off regardless of COMP Is MICOM Pin #28 "HIGH"(5V)? YES Is IC3 #15 "LOW"(0.7V)? YES Is RELAY(K74)normal? NO Check soldering /Change PCB NO Check soldering /Change PCB NO YES Is contact of Connector CN71� PIN (BLUE) normal? YES Check wire assembled status/Chang MAIN PCB ASS'Y Check Relay / Change PCB NO Check contact of Connector CN71 again - Reference • Load terminal Measure method. 62

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62
Diagnostics
3) When COMP COOLING FAN does not operate
NO
NO
NO
NO
NO
NO
Operate Forced Operation
Is COMP operating?
Is it COMP
COOLING FAN ON
condition?
Is MICOM Pin
#28 "HIGH"(5V)?
Is IC3 #15
"LOW"(0.7V)?
Is RELAY(K74)normal?
Is contact of
Connector CN71
¸
PIN (BLUE)
normal?
Start
YES
Stand by for FAN ON condition
Confirm FAN operating condition
Check soldering /Change PCB
YES
Check soldering /Change PCB
YES
Check Relay / Change PCB
YES
Check contact of Connector
CN71 again
YES
YES
Check wire assembled
status/Chang MAIN PCB ASS’Y
Ambient Temp Range
Load Operation Status
Comp Fan operates immediately upon COMP ON
Comp Fan operates in 3 min after COMP ON
Comp Fan operates in 6 min after COMP ON
Comp Fan operates in 9 min after COMP ON
Comp Fan gets off regardless of COMP
Higher than 71.6
℉
(22
℃
)
Between 62.6
℉
(17
℃
)~69.8
℉
(21
℃
)
Between 53.6
℉
(12
℃
)~69.8
℉
(16
℃
)
Between 44.6
℉
(7
℃
)~51.8
℉
(11
℃
)
Lower than 42.8
℉
(6
℃
)
Comp
Fan
DELAY
- Reference
•
Load terminal Measure method.