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General System Events
Error Message
Event Memory Write
Failure On
Low Battery Fault On
Main Board Voltage
Reference Fault On
August 2013
Table 5-1. General System Events (Continued)
Probable Cause
Internal software fault
Discharged battery. Open-circuit
voltage of two series-wired batteries
must be greater than 19.5 Vdc.
Note: Low-battery fault messages do
not disappear immediately when
corrected. The control unit only
rechecks the battery voltage once per
minute.
The control unit has detected system-
common reference fault
• Use the control unit configuration
program to download the event log and
forward an electronic copy to KIDDE
Technical Services. Refer to the
configuration program user's guide.
• Re-initialize the control unit by first
removing, and then re-applying,
primary and secondary power sources
• Functionally test the system
• Disconnect battery leads from main
circuit board TB3 and use digital volt-
ohm meter to measure battery open-
circuit voltage. Replace batteries if
open-circuit voltage is less than 19.5
Vdc.
• Reconnect batteries to TB3 if open-
circuit voltage is greater than 19.5 Vdc.
Let batteries re-charge for 48 hours.
Re-place batteries if fault remains after
48 hours.
• Check the power-supply connector, J12,
from the power supply to the main
printed-circuit board
• Check for proper setting of printed-
circuit-board AC Selection Switch. Refer
to Figure 2-8.
• Remove secondary and primary power.
Label and disconnect all field wiring.
Caution:
Disconnect all electrical control heads
and short together and tape wiring to
actuator
• Remove main printed-circuit board by
reversing the steps in Section 2-6.
Inspect connections of power-supply
connector flying leads to power supply.
Tighten if necessary.
• Ensure AC Selector Switch on power
supply is correctly set for line voltage.
Refer to Figure 2-5.
• Re-install printed-circuit board, connect
field wiring, and apply primary and
secondary power if loose connection(s)
or incorrect AC Selector-Switch setting.
Perform functional tests as necessary
• Replace power supply if no loose
connections or AC Selector-Switch
problem.
• Replace printed-circuit board if fault
remains after replacement of the power
supply.
5-4
Corrective Action
s (if applicable)
P/N 06-236530-001
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