Daewoo FR-490M Service Manual page 26

3) Self-diagnosis table
Error
Defect function
mode
F 1 Open F-sensor
F 2 Short F-sensor
E 1 Open D-sensor
E 2 Short D-sensor
F 3 Defect defrost
F 4 Defect switch
F 5 Defect compressor
Gas leakage
Defect freezing cycle
Defect F-sensor
After repairing, must initialize micro-processor, if not, then the error message in monitor is not erased. The method for
initialization is to short the terminal of capacitor CO10.
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- The voltage of port 3 in micom is lower than 0.2V or not.
- The connection state of connector(C3) in M-PCB is good or not.
- The characteristics of diode D02, D04 are good or not.
- The resistance value of R6 is the same as standard value or not.
- The voltage of port 3 in micom is lower than 0.2V or not.
- The connection state of connector(C3) in M-PCB is good or not.
- The characteristics of diode D02, D04 are good or not.
- The resistance value of R6 is the same as standard value or not.
- The voltage of port 4 in micom is lower than 0.2V or not.
- The connection state of connector(C3) in M-PCB is good or not.
- The characteristics of diode D03, D05 are good or not.
- The voltage of port 4 in micom is lower than 0.2V or not.
- The connection state of connector(C3) in M-PCB is good or not.
- The characteristics of diode D03, D05 are good or not.
- D-sensor is good or not.
- The applied voltage in D-sensor is higher than 2.94V or not.
- The resistance value of R5 is the same as standard value or not.
- Defrost heater is good or not. (Resistance of heater is 327¡ 260Ω.)
- The thermal fuse is good or not.
- The relay(RY3) for defrost is good or not.
- The port 26, 27, 28, 29 and 30 in micom are high level or not.
- Each switch(button) is good or not.
- F-sensor is good or not.
- The resistance value of R021, R022 in F-PCB is good or not.
- The compressor is good or not.
- The gas in freezing cycle is leaked or not.
24
Check method