Honeywell HC900 - Page 178

Diagnostics and Troubleshooting - Controller CPU indicators
166 HC900 Process Controller Installation and User Guide Revision 19
06/14
Number
of Red
Strobes
Possible Causes Lead and/or Reserve Controller
Action(s)
User Action Honeywell OI
Indication
HCDesigner/HC
Utilities Indication
4 Estimated battery life is
less than 5 days.
• ASYS and FSYS blocks’ HW
OK pins are turned off.
• Firmware upgrade is still
permitted.
Replace battery. If the lead’s status
LED is indicating
the failure, see
MEMORY in the
“Lead CPU
Diagnostics”
display.
If the reserve’s
status LED is
indicating the
failure, see
MEMORY in the
“Reserve CPU
Diagnostics”
display.
If the lead’s status
LED is indicating
the failure, see
Memory
Diagnostics in
the “Lead
Diagnostics
Overview” dialog
box.
If the reserve’s
status LED is
indicating the
failure, see
Memory
Diagnostics in
the “Reserve
Diagnostics
Overview” dialog
box.
4 Battery voltage is low.
• ASYS and FSYS blocks’
LOWBTRY pins are turned on.
• ASYS and FSYS blocks’ HW
OK pins are turned off.
• Firmware upgrade is inhibited
until both the Lead and Reserve
batteries are good.
Replace battery.
4 Flash failed to burn ASYS and FSYS blocks’ HW OK
pins are turned off.
1. Force a cold start
2. If diagnostic does not clear, replace
CPU module.
5 The Real-time Clock
(RTC) is not
programmed. This is
usually a result of the
lead’s battery failing
when it was powered-
down.
1. On power-up, time and date is
initially set to 00:00:00, January 1,
1970 on both the lead and the
reserve.
2. ASYS and FSYS blocks’ HW OK
pins are turned off.
Note: If the reserve’s battery fails
when it is powered-down. The lead
will automatically program the
reserve’s RTC with the correct date
and time when the lead and reserve
are synchronized.
Use HCDesigner, HCUtilities, or OI to
program the real-time clock (RTC).
If the lead’s status
LED is indicating
the failure, see
RTC in the “Lead
CPU Diagnostics”
display.
If the reserve’s
status LED is
indicating the
failure, see RTC in
the “Reserve CPU
Diagnostics”
display.
If the lead’s status
LED is indicating
the failure, see
Real-Time Clock
Diagnostics in
the “Lead
Diagnostics
Overview” dialog
box.
If the reserve’s
status LED is
indicating the
failure, see Real-
Time Clock
Diagnostics in
the “Reserve
Diagnostics
Overview” dialog
box.