If Compressor Does Not Operate - Samsung RF4287HARS Service Manual

AW3 SM-EN 2011.3.31 2:56 PM 페이지86 in
TROUBLESHOOTING

4-2-8. If compressor does not operate

Did buzzer of manual operation sound?
(Check certainly after manual operation)
0~800Hz 50% Duty
Signal output
Refer to the DIODE voltage
value in the IPM
300K-F(CHIP):INVERTER PCB
R301,302,303,304,305,306,307
Start
Did 7 mins
pass after Compressor
OFF ?
Does compressor
Refer to test function
work with manual
in the manual
operation?
Yes
No
Is CN75 PIN #4
High?(2.5V)
Replace PCB
No Is the wiring
between Main and Sub
normal?
Check the wire
disconnection
Is the connector
between Main and Sub
normal?
Is the
connector (CN301) of
COMP normal?
Is the DIODE voltage
between Pins for a single SPM
part normal?
Is the resistance value
at the measured position
normal?
Is COMP ASS'Y
normal?
Normal
No
Yes
Check after 7 minutes
Yes
No
Is freezer sensor normal?
Yes
Is the temperature sensor of
MAIN PCB normal?
Repair OPEN & disconnection
Yes
No
Yes
Check bad contact of connector
No
Yes
Check bad contact of connector
No
Yes Replace the INVERTER
PCB ASS' Y
No
Yes Replace the resistance &
INVERTER PCB ASS' Y
No
Yes
Replace COMP ASS'Y
☞ 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
86
No
Yes Repair OPEN &
disconnection
No
Yes Repair the sensor &
replace PCB
Common PCB Ground
REG1 Heater Sink