If Compressor Does Not Operate; If Compressor Does Not Operate - Samsung RFG298AA series Service Manual

TROUBLESHOOTING

4-2-8. If compressor does not operate

Refer to test function
in the manual
Did buzzer of manual operation sound?
(Check certainly after manual operation)
0~800Hz 50% Duty
Signal output
Replace PCB
Check the wire
disconnection
Refer to the DIODE voltage value in
the SPM
300K-F(CHIP) : INVERTER PCB
R509,510,511,512,513,514,515
Start
Did 7 minutes pass
after Compressor OFF?
Yes
Does compressor work
with manual operation?
Yes
No
No
Is CN75 PIN #4
High?(2.5V)
Yes
No
Is the wiring between
Main and Sub normal?
Yes
Is the connector between
Main and Sub normal?
Yes
Is the connector(CN03)
of COMP normal?
Yes
Is the DIODE voltage
between Pins for a single SPM
part normal?
Yes
Is the resistance value
at the measured position
normal?
Yes
Is COMP ASS'Y
normal?
Yes
Normal
82
No
Check after 7 minutes
Yes
Is freezer sensor normal?
Yes
Is the temperature sensor of
MAIN PCB normal?
Yes
Repair OPEN & disconnection
No
Check bad contact of connector
No
Check bad contact of connector
No
Replace the INVERTER
PCB ASS' Y
No
Replace the resistance &
INVERTER PCB ASS' Y
No
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
No
Repair OPEN &
disconnection
No
Repair the sensor &
replace PCB
Common PCB Ground
REG1 Heater Sink