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 IC70 #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
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
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
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