ABB AC 800M

Section 5 Maintenance FOUNDATION Fieldbus – CI852
3BSE 027 941 R301 131
FOUNDATION Fieldbus – CI852
Table 25. FOUNDATION Fieldbus CI852 – Fault-Finding
Fault Possible Cause and Corrective Action
R(un) and F(ault)
LEDs are not ON
The CI852 board is in the process of being restarted or
configured. Allow time for this to finalize.
If the condition persists, and all units on the CEX-bus have
non-illuminated LEDs:
• Check the CEX-bus fuse inside the PM8xx processor unit.
• Initiate a reset signal (INIT) from the PM8xx processor
unit.
• Replace the CI852 unit.
F(ault) LED is ON Use the Control Builder software to demand status information
from the CI852 unit and proceed accordingly:
• Initiate a reset signal (INIT) from the PM8xx processor
unit.
• Replace the CI852 unit.