When The Compressor Does Not Operate - Samsung RL44Q Series Service Manual

TROUBLESHOOTING 5. SELF DIAGNOSIS & TROUBLE SHOOTING

4-2-5. When the compressor does not operate

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.
* * L L E E D D S S e e g g m m e e n n t t T T y y p p e e
Press the Power Freeze + Fridge
Temp buttons for 6 seconds at the
same time and then press any one
of the four buttons once to go into
the Forced Operation mode.
☞ How to measure the voltage With the compressor
on, it is High Voltage (5V ±0.5V) between the
Common PCB Ground and IC10 MICOM #2.
Start
It passed 5 minutes
after COMP goes off.
YES
The Forced Operation
is on.
YES
The output of MICOM
IC10 #2 is "HIGH"
YES
The C70 #13 is "LOW"
(0.7V).
YES
The COMP RELAY is
normal.
YES
The contact of
CONNECTOR CN70 is
normal.
YES
COMP ASS'Y is normal.
YES
Normal
Check all the connections
☞ How to measure the voltage With the compressor
on, it is Low Voltage 0.7V °æ0.5V) between the
Common PCB Ground and IC70 #13.
75
NO
Check in 5 min
NO
Go into Forced
Operation
NO
Defective Soldering ;
Replace MICOM / PCB
NO
Check IC70, Replace PCB
NO
Check RELAY, Replace PCB
NO
Completely insert the
connector
NO
Repair or replace COMP
Common PCB Ground
REG1-Heat sink