20
TROUBLESHOOTING
Before investigating individual beam detectors
for faults, it is very important to check that the
system wiring is fault free. Many fault conditions
are the result of simple wiring errors. Earth faults
on a data loop or any ancillary zone wiring may
cause communication errors.
Please also refer to Table 4 on page 17 for infor-
mation on diagnostics that may be supplied by
the beam detector.
Fault fi nding
Fault
Possible Cause
Action
Device not recognised
Type code incompatibility
Contact control panel
manufacturer to check
compatibility
Unable to obtain amber fl ashing
alignment LED
No power to detector
Check wiring
Unable to obtain red fl ashing align-
ment LED
No power to detector
Check wiring
Amber fl ashing LED in operating
mode
Beam out of alignment
Align beam
Alarm condition without fi re
Beam partially obscured
Transmitter/receiver contaminated
Environmental conditions
Check beam line of sight
Clean lenses and/or refl ectors
Check for symptoms such as
condensation
Red LED illuminates after alignment
Panel software
Check analogue value at
control panel, then reset
Table 6
