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Honeywell 900 User Manual Page 65

Control station.
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Redundant Overview
Item
Status
REDUNDANT P/S IS
NOT PRESENT
POWER SUPPLY
PS-1 FAILED
POWER SUPPLY
PS-2 FAILED
BOTH POWER
SUPPLIES ARE
GOOD
LEAD CPU
CPU-A
POSITION
CPU-B
CPU IS MISSING
Revision 9
May 2014
Possible Cause
Controller Action
Single Power Supply
Rack continues to
configuration
function properly
Redundant Power
Backplane not
detected
A scanner has
I/O rack continues to
redundant power
function normally
supplies installed and
using the remaining
the one identified as
power supply
PS-1 is not working
Failed Power Supply
Failed Redundant
Power Backplane
detection circuit
Failed Rack backplane
status signal
Failed Scanner2 status
input
A scanner has
I/O rack continues to
redundant power
function normally
supplies installed and
using the remaining
the one identified as
power supply
PS-2 is not working
Failed Power Supply
Failed Redundant
Power Backplane
detection circuit
Failed Rack backplane
status signal
Failed Scanner2 status
input
N/A
None
CPU-A is currently the
N/A
lead
CPU-B is currently the
N/A
lead
Reserve CPU is not
The lead controller
installed or not
will continue to
powered.
control the process,
but failover is not
possible.
CPU rack backplane
failure
900 Control Station User Guide
Main Menu
Diagnostics
Fix
No action required if single
power supply rack
If dual power supply is
installed:
Replace Redundant
Power Backplane
Replace rack backplane
Replace Scanner2
Verify that the power supply
is connected to a power
source
Replace power supply
Requires unit shutdown –
replace Redundant Power
Backplane
Requires unit shutdown –
replace rack backplane.
Requires unit shutdown – replace
Scanner2.
Contact Honeywell Service.
Verify that the power supply
is connected to a power
source
Replace power supply
Requires unit shutdown –
replace redundant power
backplane
Requires unit shutdown –
replace rack backplane.
Requires unit shutdown –
replace Scanner2.
Contact Honeywell Service.
None
N/A
N/A
Install reserve CPU
Apply power to reserve CPU
Replace CPU rack backplane
Contact Honeywell Service.
53

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