Ricoh M160 Service Manual page 263

SC No. Level
SC554-00 A
SC No. Level
SC557-00 C
SM
Error Name/Error Condition/Major Cause/Solution
Fusing (End) thermistor high-temperature detected (hardware)
The hardware high-temperature error sensor flag is detected.

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 Unit.
Error Name/Error Condition/Major Cause/Solution
Zero-crossing frequency exceeded
The number of zero-crossing interrupts exceeds a certain value
in 500 ms.
The frequency of the commercial power supply line is unstable
or noise occurs.
None
6-19
Service Call
M160/M161