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No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
670
CTL
D
Engine start up error
The BICU fails to respond within the prescribed time when the machine
is turned on.
 Connections between BICU and controller board are loose,
disconnected, or damaged.
1. Replace the BICU.
2. Replace the controller board.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
672
CTL
D
Controller start up error
After the machine is powered on, the communication between the
controller and the operation panel is not established, or communication
with the controller is interrupted after a normal startup.
After startup reset of the operation panel, the attention code (FDH) or
the attention acknowledge code (FEH) is not sent from the controller
within 30 seconds.
After the controller issues a command to check the communication line
with the controller at 30-second intervals, the controller fails to respond
twice.
 Controller stalled
 Controller board installed incorrectly
 Controller board defective
 Operation panel connector loose or defective
 The controller is not completely shut down when the
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