45
Part No. 6-847684-00 Rev. D01
Troubleshooting Guide
Symptom
Possible Cause
Corrective Action
a. AC power is not turned on.
b. Blown internal fuse.
c. AC power wiring is not
connected.
d. Three-wire power supply
harness is not connected
between power supply and
annunciator board
e. Faulty power supply
assembly.
a. Check AC power source.
b. Replace fuse.
c. Check AC entrance wiring at power
supply terminals. Verify two-pin
plastic connector is plugged into
power supply circuit board.
d. Check connections on each end
including orientation of cable
connectors. Reconnect if necessary.
e. Replace power supply assembly.
1) No visual indicators
illuminated on entire alarm
panel
a. 20-wire ribbon cable(s)
between annunciator module
and digital display or multi-
signal modules not
connected.
b. Faulty 20-wire ribbon cable.
c. Faulty digital display or multi-
signal module.
d. Faulty annunciator module.
2) No visual indicators
illuminated on isolated
module(s). Green
annunciator module POWER
indicator is illuminated.
a. Reconnect ribbon cable(s).
b. All alarm panels have two 20-wire
ribbon cables (attached to
annunciator connectors “J1” and
“J2”). Remove suspect cable (both
ends) and replace with other cable. If
problem is corrected, replace faulty
cable.
c. If alarm panel contains another
working digital display or multi-signal
module, unplug ribbon cable from
working module and connect to non-
working module. If module does not
illuminate, replace faulty digital
display or multi-signal module.
d. Replace faulty annunciator module.
3) Constant audible alarm that
can not be silenced by
pressing front panel MUTE
button. No visual alarm
on any digital display or
multi-signal module.
a. Faulty digital display or multi-
signal module.
b. Faulty 20-wire ribbon cable.
c. Faulty annunciator module.
a. Disconnect digital display and/or
multi-signal modules one at a time
from 20-wire ribbon cables. If
disconnecting a module cancels
audible alarm, replace that faulty
module.
b. After all modules have been
disconnected from 20-wire ribbon
cables, disconnect each cable, one at
a time from annunciator module. If
disconnecting ribbon cable cancels
alarm, replace that faulty cable.
c. If both 20-wire ribbon cables have
been removed from annunciator
module, and audible alarm has not
cancelled, replace faulty annunciator
module.
