HR 235 with a H2-00 code

[Ricoh Dicoh]

Thought i had a service manual for this machine but i don't. So what is this code?

[Ricoh Dicoh]

AR*

[Akitu]

From the manual:

H2 00 Content Thermistor open detection
Details Thermistor open detection
Fusing unit not installed
Cause Thermistor defect
Control PWB failure
Fusing section connector contact failure
Fusing unit not installed
Check
and
remedy
Check the harness and the connector of
the thermistor and the MCU.
Clear the display of self-diagnostics with
SIM 14.
Remarks Thermistor open