Samsung CM1929 - Error Codes & Corrections

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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
rmly 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.