Samsung RF4287HARS/XAA - If compressor does not operate

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TROUBLESHOOTING
4-2-8. If compressor does not operate
Refer to test function
in the manual
☞ Voltage checking method
Common Ground REG1 Heater Sink in PCB and
1) IC01 MICOM #4 ; Square wave voltage → 3V
measured after MULTI TEST
IC01 MICOM #4, COMP operates
Common PCB Ground
REG1 Heater Sink
Start
Check after 7 minutes
Repair OPEN & disconnection
Repair OPEN &
disconnection
Did 7 mins
pass after Compressor
OFF ?
No
Yes
No
Check bad contact of connector
Check bad contact of connector
No
Replace PCB
0~800Hz 50% Duty
Signal output
No
Check the wire
disconnection
No
Repair the sensor &
replace PCB
No
Yes
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Does compressor
work with manual
operation?
Is CN75 PIN #4
High?(2.5V)
Is the wiring
between Main and Sub
normal?
Is the connector
between Main and Sub
normal?
No
Is the
connector (CN301) of
COMP normal?
Replace the INVERTER
PCB ASS’Y
No
Is the DIODE voltage
between Pins for a single SPM
part normal?
Is freezer sensor normal?
Is the temperature sensor of
MAIN PCB normal?
Normal
Refer to the DIODE voltage
value in the IPM
Replace the resistance &
INVERTER PCB ASS’Y
No
Is the resistance value
at the measured position
normal?
Replace COMP ASS'Y
No
Is COMP ASS'Y
normal?
300K-F(CHIP):INVERTER PCB
R301,302,303,304,305,306,307
Did buzzer of manual operation sound?
(Check certainly after manual operation)
AW3 SM-EN 2011.3.31 2:56 PM 페 이 지 8 6 i n