Honeywell 900 - Page 71

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Lead/Reserve CPU Diagnostics Diagnostics
Revision 9 900 Control Station User Guide 59
May 2014
Class Status Possible Cause Controller Action Fix
LOW BATTERY Battery voltage is low.
1. Associated rack
monitor block’s
RACK OK pin is
turned off.
2. SYSTEM
MONITOR
block’s LOW
BATTERY pin is
turned on.
3. SYSTEM
MONITOR
block’s HW OK
pin is turned off.
Replace battery.
FLASH ERROR Flash failed to burn
1. Associated rack
monitor block’s
RACK OK pin is
turned off.
2. SYSTEM
MONITOR
block’s HW OK
pin is turned off.
1. Force a cold start.
2. Replace CPU board.
RTC GOOD N/A N/A N/A
NOT
PROGRAMMED
RTC not programmed
1. Time and date is
set to 00:00:00,
January 1, 1970.
2. Associated rack
monitor block’s
RACK OK pin is
turned off.
3. SYSTEM
MONITOR
block’s HW OK
pin is turned off.
Program RTC.
BAD DATA Bad date and time
See NOT
PROGRAMMED.
1. Program RTC.
2. Cycle power.
3. Replace CPU.
4. Replace boards in rack.
5. Replace rack.
PROGRAMMIN
G FAILURE
RTC failed to program
See NOT
PROGRAMMED.
See BAD DATA.
READ FAILURE Unable to read RTC
See NOT
PROGRAMMED.
See BAD DATA.