Ricoh M0A0

6.Troubleshooting
251
SC No.
Level
Error Name/Error Condition/Major Cause/Solution
SC542-
02
A
Fusing lamp (Center) not reloaded (Broken heater wire)
The heater (Center) thermistor does not reach the reload temperature 23 seconds after the start
of motor rotation.
 The overtemperature prevention mechanism started working
 Clear the SP: fusing SC.
 Replace the thermistor.
SC No.
Level
Error Name/Error Condition/Major Cause/Solution
SC543-00
A
Fusing (Center) thermopile high-temperature detected (software)
The temperature is detected to stay at 250 degrees C or higher for one second.
 Shorted triac
 Failure in the BiCU
 Clear the SP: fusing SC.
 Replace the BiCU.
SC No.
Level
Error Name/Error Condition/Major Cause/Solution
SC544-
00
A
Fusing (Center) thermopile high-temperature detected (hardware)
The hardware high-temperature error sensor flag is detected (250 degrees C or higher).
 Damaged triac (shorted)
 Failed engine control board
 Failed fusing thermopile
 Failed fusing thermistor
 Abnormal fusing control software behavior
 The PWM signal is continuously supplied from the IH inverter (due to a software or
temperature sensor error).
 Clear the SP: fusing SC.
 Replace the PSU.
 Replace the Engine Board.
 Replace the fusing thermopile.
 Replace the fusing thermistor.
 Replace the Fusing Unit.
SC No.
Level
Error Name/Error Condition/Major Cause/Solution
SC545-
00
A
Fusing (Center) lamp stays ON
The thermistor (center) has not detected the target temperature, even after the fusing lamp stays
ON for more than 11 seconds after reloading.
 Deformed or floating thermistor