Honeywell 900 User Manual page 64

Main Menu
Diagnostics
Item Status
FLASH ERROR
POWER GOOD
SUPPLY DIAG
POWER SUPPLY
PS-1 FAILED
POWER SUPPLY
PS-2 FAILED
POWER UNKNOWN
SUPPLY
STATUS
52
Possible Cause Controller Action
1. Associated rack
Flash failed to burn
monitor block's
RACK OK pin is
turned off.
2. SYSTEM
MONITOR
block's HW OK
pin is turned off.
N/A N/A
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
No Rack If under power, I/O
communication will switch to failsafe
values
Loss of Comms
If not powered (un-
powered outputs)
Loss of AC mains
Bad Power Supply
Failed Scanner2
900 Control Station User Guide
Redundant Overview
Fix
1. Force a cold start.
2. Replace CPU board.
N/A
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.
Determine and correct cause of
communication failure.
Determine and correct cause of
communication failure.
Restore rack operation
Restore AC mains power, reset
breaker
Replace Power Supply
Replace Scanner2
Revision 9
May 2014