Honeywell C300 - Display Shows FAIL; Isolated (Lonely) Node

10. C300 Controller Troubleshooting
10.4. Fixing common problems
240
Series 8 C300 Controller User's Guide
Honeywell
R500
April 2017
Display shows FAIL
The C300 Controller detects failure during system integrity checks, such as Watch Dog
Timer (WDT), error detection circuits, Field Programmable Gate Array (FPGA)
readback, microprocessor static configuration registers, and Read Only Memory (ROM)
checksum.
Diagnostic Check
 The 4-character display on the controller displays FAIL.
 In the Monitoring tab, the C300 Controller icon turns red.
Cause
The controller software has detected a background diagnostic failure that
does not allow operation to continue.
Solution
Recycle power to the controller. If error persists, replace the controller.
Refer to the section C300 Controller module and IOTA replacem ent for
details.
Check the Trace log for breadcrumbs that occurred prior to the event.
Refer to the section Using CTools for capturing diagnostic data for more
information. Provide the results of the trace log to TAC for analysis.
Isolated (lonely) Node
For a redundant C300 Controller pair, Fault Tolerant Ethernet (FTE) communications
with partner and FTE network are lost.
Diagnostic Check
 The Primary controller determines if switchover needs to be
initiated. If the Secondary was known to be in better condition than
the Primary at the time of fault determination, then the Primary
should fail so the Secondary will switchover. But, the new
Secondary (old Primary) still cannot restore FTE communications.
 The Secondary controller should reboot once, in an attempt to
restore communications. The Primary controller will be able to report
the problem in the Secondary. If the Secondary cannot restore FTE
communications, it should be able to resynchronize over the
redundancy link and be a partially functional backup.
Cause 1
Secondary controller is defective.
Solution
Replace the Secondary controller that initiated switchover when fault
was detected. Refer to the section C300 Controller module and IOTA
replacement for details.
If Secondary controller synchronizes after replacement, the removed
controller is defective. Otherwise, proceed to Cause 2.