Product specifications

Fault-Finding Procedures Section 5 Maintenance
204 3BSE036351-510 A
Fault-Finding Procedures
The following sections describe elementary fault-finding procedures. For complete
instructions contact ABB Support.
PM8xx Processor Unit in Single CPU Configuration
Table 26. PM8xx – Fault-Finding Procedure
Fault Possible Cause and Corrective Action
F(ault) LED is ON Controller Re-start, (INIT), in progress.
• Wait for Controller restart to finalize.
Missing firmware.
• Upgrade firmware.
Firmware upgrade in progress.
• Wait for FW upgrade to finalize.
Firmware upgrade failure.
• Use serial FW upgrade.
Missing TB852
• Check TB852 connection
(PM861, PM864, PM865).
Other
• Check controller log.
F(ault) LED is flashing Firmware upgrade in progress:
• Wait for FW upgrade to finalize.
Other
• Check controller log.
R(un) LED is OFF No application loaded in the Controller.
• Download application.
Controller application failed.
• Restart Controller (INIT push button).
• Download application.