6.Troubleshooting 
174 
Error Name/Error Condition/Major Cause/Solution 
  Defective main motor 
  Disconnected or defective motor harness 
1.  Turn the power OFF and ON. 
2.  Replace the main motor if the torque load is normal. 
3.  Clean/replace the AIO and/or fusing unit if the torque load is abnormal. 
4.  Replace the motor harness. 
 
Error Name/Error Condition/Major Cause/Solution 
The FAN lock signal – High for 10 seconds, after the cooling fan motor started to 
rotate. 
Disconnected or defective fan motor harness 
1.  Turn the power OFF and ON. 
2.  Replace the cooling fan. 
3.  Replace the fan motor harness. 
 
Error Name/Error Condition/Major Cause/Solution 
The thermistor output is less than 0°C for 5 seconds after the fusing lamp turns ON. 
Disconnected or defective fusing thermistor 
1.  Reset the SC. 
2.  Replace the fusing unit. 
3.  Replace the drawer harness. 
4.  Replace the PSU. 
 
Error Name/Error Condition/Major Cause/Solution 
The fusing temperature rises 6°C or less in 1.5 seconds; and this continues 5 
times consecutively. 
  Defective or deformed thermistor 
  Incorrect power supply input at the main power socket 
The fusing temperature has not reached 45°C within 9 seconds (after the fusing 
lamp comes ON while the machine is warming-up). 
  Defective or deformed thermistor 
  Incorrect power supply input at the main power socket