Error code C-0657 for Bizhub Press 1250 1250P 1052 Bizhub Pro 951

Code: C-0657
Classification: PF: Heater low temperature abnormality
Cause:
2nd tandem PF-703 dehumidification heater /1 (HTR1) low temperature hardware abnormality.
The temperature sensor /5 (TEMS/5) detects the heater temperature lower than 0 C a specified period of time after the heater is turned ON.
  
Measures to take when alert occurs:
The main body and the option stop immediately.                                                 

Estimated abnormal parts:

  • Upper tray fan heater (HT-505)
  • AC drive board /2 (ACDB/2: HT-505)
  • PF drive board (PFUDB- PF-703)
Correction:
Turn OFF/ON the power switch (SW2) of the main body when releasing an abnormal condition.
Note: The message "Please call service" is displayed on the panel.
                      
Solution:
  1. Check the connection between ACDB/2 and the noise filter of PF-703.
  2. Check the connector connection and the wiring between ACDB/2 and the fan heater, and repair it if any abnormality.
  3. Check the connector connection and the wiring between PFUDB and the fan heater, and repair it if any abnormality. 
  4. Check the connector connection and the wiring between PFUDB and ACDB/2, and repair it if any abnormality.
  5. Check the temperature and the installation of the fan heater, and repair it if any abnormality.
  6. Replace the fan heater.
  7. Replace ACDB/2.
  8. Replace PFUDB.          
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