Samsung RT53 Service Manual page 52

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TROUBLESHOOTING
4-2-5. When the Compressor is not working (INVERTER PBA)
When the inverter PBA LED
is ON, it indicates that the
compressor does operate
normally
Refer to Test Function in this
manual
Forced Operation signal
sound should be checked
0~800Hz 50% Duty Signal
Output
Check the wire harness
Replace the MAIN PBA
Replace INVERTER PBA
☞ SMPS Primary Voltage checking(+16V) : REG1(+5V)
RELATED TITLES
Hotpoint,Mba
4033 Cv
Start
10 minutes have
passed since COMP
was off
Yes
When Forced Operation
mode is activated, COMP operates
Yes
Yes
COMP operation
No
Signal(CN201 ①↔③) is
High(about DC 2-2.5V
or AC 0~5.0V)
Yes
No
Is DC 16V applied to
ZD501?
Yes
CN101/CN102 Connector is Good
Yes
COMP ASS'Y is Good
Yes
LG_MULTI_F_3828A20097W_1[1] Samsung
Refrigerador
No
Check in 10 minutes
No
Temperature Sensor is normal?
Yes
Temperature sensing
part of MAIN PBA is Good
Yes
Replace MAIN PBA or
Repair the connection
No
Check the COMP wire
Check the Compressor
Check AC Power wire
No
Replace COMP ASS'Y

34648123
WD856UH
No
Replace the Sens
No
Repair the sensin
part or Replace MAIN