Samsung CM1929, Service Manual

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24
6. Troubleshooting
6-2 Error Codes & Corrections
CODE CAUSE CORRECTIONS
E1 1 . Improper input power freqency .
2 . Defective Ass’y Main P .C .B Check if power frequency is 50Hz .
Replace Ass’y Main P .C .B or MICOM
E3 1 . Overtheating inside cavity
(no load or little load aging)
2 . Air ventilation blocked around exhaust
area
3 . Ventilation motor failure and magnetron
overheating
Check if the oven was operating without load or too
little load and plug the power cord in again . If error
code ‘E3’ appears again in the window display,
check resistance of Thermistor sensor and replace
if defective .
Check of any blocking mterials exhaust area
around the Air Exhaust or ventilation opening and
follow the instuctions above .
Check if the ventilation motor is operative
magnetron overheating and replace the motor if
defective .
E41 1 . Main Relay (RY1) or Power Relay1(RY2)
failure
2 . Loose lead wires of relay
3 . Primary or Monitor S/W failure
4 . Loose lead wires of Primary or Monitor
S/W
5 . H .V .Trans input power sensing circuitry
failure
Check Main Relay (RY1), Power Relay1 (RY2)
Primary S/W and Monitor S/W and replace if
defective .
Check if lead wires are loosened and connect
firmly if loose.
Check the circuitry and replace if defective .
(Refer to Operating Sequence
as shown in page 32 .)
E42 1 . Main Relay (RY5) failure
2 . Loose lead wires of Power relay (RY5)
3 . Primary or Monitor S/W failure
4 . Loose lead wires of Primary or Monitor
S/W
5 . Fuse(10A)blown out on neutral area of
Ass’y Noise Filter .
6 . H .V .Trans input power sensing circuitry
failure
Check Power Relay2,Primary S/W,Monitor S/W
or Fuse and replace if defective .
Check if lead wires are loosened and repair as
necessary .
Check the circuitry .(Refer to Operating
Sequence as shown in page 32 .)
E5 1 . Memory IC(EEPROM IC) failure
2 . MICOM failure Check Memory (IC3) and replace if defective .
Replace Ass’y Main P .C .B or MICOM .