Samsung RB195BSSB Service Manual - Page 59

When COMP does not operate

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Diagnostics 13-3) When COMP does not operate Pre-Check "Check out the COMP with the Forced Operation selected" 1. If it does not pass 5 min after a desired Temp reached,COMP does not operate. 2. During Defrost,COMP does not operate. 3. With the disconnected F-Sensor or R-Sensor,COMP does not operate because low temperature is detected. Start Is Forced Operation on? YES Is the MICOM #22 output "HIGH"(5V)? YES Is the IC70 #12 "LOW"(0.7V)? YES Is COMP RELAY normal? YES Is the contact of CONNECTOR CN70 contact normal NO Does COMP ASS'Y Function normally? YES Check wire assembly/connection NO Run Forced Operation NO Soldering checkout/ Change MICOM or PCB NO Change or repair IC04/ NO Change PCB YES Check RELAY / Change PCB - Reference • Load terminal Measure method. Insert Connector completely / Check its connection NO Change/repair COMP 59

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59
Diagnostics
“Check out the COMP with the Forced Operation selected”
1. If it does not pass 5 min after a desired Temp reached,COMP does not operate.
2. During Defrost,COMP does not operate.
3. With the disconnected F-Sensor or R-Sensor,COMP does not operate because low
temperature is detected.
Pre-Check
13-3) When COMP does not operate
NO
NO
NO
NO
YES
NO
Run Forced Operation
Is Forced Operation on?
Is the
MICOM #22 output
"HIGH"(5V)?
Is the IC70 #12
"LOW"(0.7V)?
Is COMP RELAY normal?
Is the contact
of CONNECTOR CN70
contact normal
Does
COMP ASS'Y Function
normally?
Start
YES
Soldering checkout/
Change MICOM or PCB
Change or repair IC04/
Change PCB
YES
Check RELAY /
Change PCB
- Reference
• Load terminal Measure
method.
YES
Insert Connector completely /
Check its connection
YES
Change/repair COMP
NO
YES
Check wire assembly/connection