4 Fault Isolation
4.3 Fault Isolation Concepts
R688 HPM High-Performance Process Manager Service 331
December 2020 Honeywell
Table 58 Communications and Control Processor Hard Failure Codes
Corrective Action
(See Table 57)
Set timeout EF failure 2.
Could not read own Checkpoint.
Control processor failure detected.
Secondary incompatible database
Could not write own Checkpoint.
Primary timesynch hardware failure
Secondary timesynch hardware
failure.
Control watchdog timed out.
I/O Link watchdog timed out.
Control processor in reset.
I/O Link processor in reset.
Comm database checksum compare
failed
Reserved for future RDN Subsystem
crash codes.
UCN in primary has failed.
EHPM Firmware Image (also known
as the Application Image) has failed.