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SYMPTOM
FIRE LEDs
flashing, internal sounder
constant and external alarms
sounding.
Controls inactive.
TM0064
POSSIBLE CAUSE
1. Spurios trigger of device.
2. Device fault.
3. Loop PCB 29-020549-
000 or 29-020550 defective.
4. Terminal PCB 29-
020517-000 defective.
5. Main processor PCB 29-
020460-000 Rev 8
defective.
6. VFD PCB defective.
1. ACCESS keyswitch
INHIBIT position.
2. ACCESS/INHIBIT
switch faulty.
Page 87 of 91
ACTION
1. Press SILENCE
ALARMS. The external
alarms should silence and
FIRE LEDs stay on
constant.
2. Press SYSTEM RESET.
The VFD should return to
STATUS NORMAL. The
FIRE LEDs should be
extinguished.
1. Identify the defective
device from the VFD.
2. Isolate the device using
the appropriate menu
selection.
3. Renew the device and de-
isolate.
1. Check if LOOP FAULT
LED on terminal PCB is
illuminated.
2. Renew PCB if LED is lit.
Renew terminal PCB.
Renew processor PCB.
Renew VFD PCB.
Switch to ACCESS
Replace keyswitch.
NOTE Emergency SW1 of
SKI on 460 processor PCB
provides override to
permanent ACCESS.
Issue 2.01
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