Ricoh M160 Service Manual page 260

Service Call
SC No. Level
SC544-00 A
SC No. Level
SC545-00 A
M160/M161
Error Name/Error Condition/Major Cause/Solution
Fusing (Center) thermopile 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
Fusing (Center) lamp stays ON
The thermistor (center) has not detected the target temperature,
even after the fusing lamp stays ON for more than 30 seconds
after reloading.

Deformed or floating thermistor

Broken fusing lamp wire

The overtemperature prevention mechanism started
working

Clear the SP: fusing SC.

Replace the fusing thermistor.

Replace the fusing (Center) lamp.
6-16 SM