Code: C-0421
Classification: PF: PF power source abnormality
Cause:
Abnormality of the 12V power for the PF drive board (PFUDB) of the 2nd tandem PF-703/706.
An error detection signal of the PFUDB (blowout of 12V ICP) is detected.
Measures to take when alert occurs:
The main body and the option stop immediately.
Estimated abnormal parts:
- PF drive board (PFUDB: PF-703/706)
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:
- Check the connector connection and the wiring on PFUDB, and repair it if any abnormality.
- Replace PFUDB.