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. 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 overheating and replace the motor if
defective.
E41
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.
E42
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.
E5
(CM1929/1
629/1329)
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.
