Product specifications

Section 5 Maintenance PM861/PM864/PM865/PM866/PM891 Unit in Redundant Configuration
3BSE036351-510 A 205
PM861/PM864/PM865/PM866/PM891 Unit in Redundant Configuration
B(attery) LED is flashing Battery voltage (Internal or External) is below 3.1 V
or non-existent.
• Install new battery.
External battery cable disconnected.
• Connect external battery cable.
See Fault-Finding Ta bl e 30 on page 208.
Table 27. PM861/PM864/PM865/PM866/PM891 Redundant Configuration –
Fault-Finding Procedure
Fault Possible Cause and Corrective Action
DUAL LED is OFF on both
CPUs
The CPUs are in the process of being re-started
or configured. Allow time for this to finalize.
RCU Link Cable disconnected.
• Connect the RCU Link Cable.
Different Control Software in the two CPUs.
• Upgrade the CPUs with the same control
software.
Fault LED is ON Check controller log.
Table 26. PM8xx – Fault-Finding Procedure (Continued)
Fault Possible Cause and Corrective Action