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Code
Cause
Corrections
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
1. Overheating 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 if any blocking amterials exist exhaust area around
the Air Exhaust or ventilation openings and follow the
instructions above.
Check if the ventilation motor is operative magnetron over-
heating and replace the motor if defective.
1. Main Relay (RY1) or Power Relay
(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 Relay (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.
1. Power 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 circuit
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.
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.
6-1 Electrical Malfunction(continued)
