Honeywell 900 - Page 62

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Diagnostics Redundant Overview
50 900 Control Station User Guide Revision 9
May 2014
Item Status Possible Cause Controller Action What to do
RSM SWITCH
MISMATCH
The lead and reserve
controller are both
reading the switch on
the RSM, but are getting
different values.
The controller will
continue to operate
with a bad RSM.
Automatic failover is
still possible if
required.
Replace the RSM
Replace the reserve CPU
Force a failover and replace the
new reserve CPU
Contact Honeywell service
NO RSM MODULE
DETECTED
Switch on RSM is set
between two positions.
RSM Module is not
inserted
RSM Module has failed
The controller will
continue to operate
with a missing RSM.
Automatic failover is
still possible if
required.
Make sure switch is in desired
position
Install RSM module
a)
Replace RSM
BAD RSM SWITCH
(LEAD)
Switch is indicating an
invalid position
The controller will
continue to operate
with a bad RSM.
Automatic failover is
still possible if
required.
Replace RSM
Force a failover and replace the
CPU (formerly the lead, now the
reserve)
BAD RSM SWITCH
(RESERVE)
Switch is indicating an
invalid position
The controller will
continue to operate
with a bad RSM.
Automatic failover is
still possible if
required.
Replace RSM
Replace the reserve CPU
Item Status Possible Cause
CPU STATUS GOOD
ERROR IN RACK 1
ERROR IN RACK 2
ERROR IN RACK 3
ERROR IN RACK 4
ERROR IN RACK 5
ERROR IN LEAD CPU
ERROR IN RESERVE CPU
ERROR ON SERIAL PORT S1
ERROR ON SERIAL PORT S2
ERROR ON E1 NETWORK PORT
ERROR ON E2 NETWORK PORT
ERROR ON SCANNER I/O LINK
REFER TO Table 26 (page 51)
REFER TO Table 26 (page 51)
REFER TO Table 26 (page 51)
REFER TO Table 26 (page 51)
REFER TO Table 26 (page 51)
REFER TO Table 27 (page 57)
REFER TO Table 27 (page 57)
REFER TO Table 7 (page 24)
REFER TO Table 7 (page 24)
REFER TO Table 11 (page 28)
REFER TO Table 11 (page 28)
REFER TO Table 26 (page 51)
MEMORY STATUS
RTC STATUS
I/O RACK COMM PORT
STATUS
RACK I/O MODULE
STATUS
COMM PORTS
E1/E2/S1/S2 STATUS