25
Samsung Electronics
Troubleshooting
Code
Cause
Corrections
E1
1. Improper input power
Check if power frequency is 50Hz.
frequency
2. Defective Ass’y Main PCB
Replace Ass’y Main PCB or MICOM.
E21
1. Thermistor sensor failure
Check resistance of thermistor sensor
2. Thermistor sensor open
and replace if defective.
3. Loose connector CN2
Check the circuitry around thermistor sensor.
E22
1. Thermistor sensor failure
Check resistance of Thermistor sensor
and replace if defective.
2. Thermistor sensor short
If Thermistor sensor is short, replace.
3. Thermistor sensor wire short
Check the circuitry around Thermistor sensor.
E3
1. Overheating inside cavity
Check if the oven was operating
(no load or little load aging)
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.
2. Air ventilation blocked around
Check if any blocking amterials exist
exhaust area
around the Air Exhaust or ventilation
openings and follow the instructions above.
3. Ventilation motor failure and
Check if the ventilation motor is operative
magnetron overheating
and replace the motor if defective.
E41
1. Main Relay (RY1) or
Check Main Relay (RY1), Power Relay (RY2)
Power Relay (RY2) failure
Primary S/W and Monitor S/W and replace
2. Loose lead wires of relay
if defective.
3. Primary or Monitor S/W
Check if lead wires are loosened
failure
and connect firmly if loose.
4. Loose lead wires of Primary
or Monitor S/W
5. H.V.Trans input power sensing
Check the circuitry and replace if defective.
circuitry failure
(Refer to Operating Sequence
as shown in page 42.)
E42
1. Power Relay (RY5) failure
Check Power Relay2, Primary S/W,
2. Loose lead wires of
Monitor S/W or Fuse
Power Relay (RY5)
and replace if defective.
3. Primary or Monitor S/W failure
Check if lead wires are loosened
4. Loose lead wires of
and repair as necessary.
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
Check the circuitry. (Refer to Operating Sequence
circuit failure
as shown in page 42.)
E5
1. Memory IC (EEPROM IC)
Check Memory IC (IC3) and replace if defective.
(CM-1829
failure
/1429)
2. MICOM failure
Replace Assy Main PCB or MICOM.
6-2 Error Codes & Corrections
