When Comp Cooling Fan Does Not Operate - Samsung RS2511 Series Service Manual

Diagnostics

3) When Comp Cooling Fan does not operate

Start
Is COMP operating?
Is it COMP COOLING FAN ON
condition?
Is MICOM Pin #31
"HIGH"(5V)?
Is IC3 #17
"LOW"?
Is RELAY(RY77)
normal?
Is contact of Connector
CN71(ORANGE) normal?
Check wire assembled status of
FAN MOTOR
NO
YES
NO
YES
Higher than (64.4 °F/18 °C)
Comp Fan
Between (55.4 °F/13 °C)
DELAY
and (62.6 °F/17°C)
Lower than (53.6 °F/12°C)
NO
YES
NO
YES
NO
YES
NO
YES
Operate Forced Operation
Stand by for FAN ON condition
Confirm FAN operating condition
Ambient Temp
Comp Fan operates in 5 min after COMP ON
Comp Fan gets off regardless of COMP
Check soldering / Change PCB
Check soldering / Change PCB
Check Relay / Change PCB
Check contact of Connector
CN71 again
39
Range Load Operation Status
Comp Fan operates immediately
upon COMP ON