Measures to take when alert occurs:
- AC drive board (ACDB)
- PB control board (PBCB)
- PB drive board (PBDB1)
- Pellet supply cooling fan (FM4)
- When you isolate the faulty part, the limited use is available.
- The message "Please call service" and "Press [Help] to disengage" are displayed alternately on the touch panel.
- When you press the help key, the message "Please turn on power again" is displayed on the touch panel.
Solution:
- Check the connector connection and the wiring between PBDB1 and the fan, and repair it when there is any abnormality.
- Rotate the fan or I/O by hand, and repair it when there is any abnormality. (Wiring diagram: PB-503: 4-D).
- Replace FM4.
- Replace PBDB1.
