13-4) When Fan Does Not Operate - Samsung RB215BSSB Service Manual

Diagnostics

13-4) When FAN does not operate

Note
"Check out the F-FAN with the Forced Operation selected"
1. F-Room FAN, R-Room FAN and COMP COOLING FAN remains OFF while COMP is off.
(R-FAN can be on with the defrost function.)
2. When Comp is ON,R-FAN does not always remain ON (including Forced Operaation) and
when R-Room temp reaches to set temp,R-FAN remains OFF.
3. When R-Room &F-Room are closed after being opened,each FAN starts up with a delay time
(5sec ~1min) immediately.(Comp ON condition)
1) When F-Room FAN(F-FAN)does not operate
Freezer Door Switch input #42
Check wire assembled status/Change MAIN PCB ASS'Y
Start
Is it during Forced Operation?
YES
Does Fan
operate with DOOR S/W
presses? (Including
Delay Time)
NO
Is DOOR S/W normal?
YES
Is the voltage
of MICOM #42 5V (Close
condition)?
YES
Is insertion of
CN71⑪PIN(YELLOW)of MAIN
PCB normal?
YES
Is voltage
of MICOM Pin #27
"HIGH"(5V)?
YES
Is voltage of IC70 #14 "LOW"(0.7V)?
YES
Is F-FAN RELAY(SSR71) normal?
60
NO
Start Forced Operation
YES
Normal R-FAN
NO
Change DOOR S/W
NO
Check soldering /Change PCB
NO
Re-insert ConnectorCN71
NO
Check soldering /Change PCB
NO
Check IC70 /Change PCB
NO
Check RELAY /Change PCB
- Reference
• Load terminal Measure method.