Error code C-1355 for Bizhub Press 1250 1250P 1052 Bizhub Pro 951

Code: C-1355
Classification: RU: RU-509 abnormality
Cause:

Error detection signals of FM21 is detected continuously for a specified period of time while the ventilation assist fan/3 (FM21) is ON.

Measures to take when alert occurs:

         The main body and the option stop immediately.                                                 
Estimated abnormal parts:
  • Jumper connector CN108
  • Ventilation assist fan/3 (FM21)
  • RU control board (RUCB)
Correction: 
        Turn OFF/ON the sub power switch (SW2) on the main body when releasing an abnormal condition.
             
      Note: 
  • The message "Please call service" is displayed on the panel. 

Solution:

  1. When HM- 102 is not connected, check if the jumper connector CN108 is connected. Connect the connector if its not connected.
  2. Check the connector connection and the wiring between RUCB and the fan, and repair it if any abnormality.
  3. Rotate the fan or I/O by hand, and repair it if any abnormality. (Wiring diagram: RU-509: 19-L). 
  4. Replace FM21
  5. Replace RUCB.
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