Ricoh D027 Service Manual page 21

SC Tables
No. Type
Temperature and humidity sensor error 2
498 C
1.
2.
D027/D029 APPENDICES
Details (Symptom, Possible Cause, Troubleshooting Procedures)
The thermistor output of the temperature sensor was not within the
prescribed range (0.5V to 4.2V).
The thermistor output of the humidity sensor was not within the
prescribed range (0.01V to 2.4V).
Temperature and humidity sensor harness disconnected, loose,
defective
Temperature and humidity sensor defective
Check the connector and harness.
Replace the temperature/humidity sensor.
3-24 SM