Samsung RSG5D series, Service Manual

Page: 71 / 111

71
TROUBLE SHOOTING
4-2-5) When the Comp does not operate(AC)
Start
Check in 5 minutes.
Replace F-Sensor
Replace MICOM & PCB
YES
NO
NO
NO
NO
YES
It passed 5 minutes
after COMP goes off.
YES
The Forced Operation is on?
YES
The output of MICOM
#69 is “HIGH”(5V)
YES
The IC75 #15 is “LOW”?
(about 0.7V)
YES
The COMP Relay is good?
F-Sensor is good?
Repair the sensing
part or replace PCB
Replace MAIN PCB or
Repair the Connection
There was the Forced Operation
signal sound(Make sure to check
after the Forced Operation.
NO
YES
F-Sensor is good?a
Replace MICOM & PCB
Normal
Check RELAY Replace PCB
NO
NO
YES
COMP ASS’Y is good?
Repair or replace COMP
NO
YES
The Contact of Connector
CN71 is good?
Completely insert the
Connector
NO
Pre Check
Check the Compressor during the Forced Operation.
1. It takes more than 5 minutes before the Compressor starts operating since it becomes the set temperature.
2. The Compressor does not work during the defrost.
3. It also takes more than 5 minutes to run the compressor again when an instant power failure is detected.