Spectrex 40/40L-LB UV/IR Flame Detector Series - Manual (Page 51)

TM 40/40L, Rev (6) February 2013
Troubleshooting 39
4.2 Troubleshooting
This section is intended to be a guide to correct problems which may happen
during normal operation.
Table 18: Troubleshooting Table
Problem Cause Corrective Action
LEDs Off
Fault Relay at N.O
0-20mA at 0mA
No power at the
unit  Check that the correct power
is sent to the detector.
 Check power polarity.
 Check wiring in the detector.
 Send the detector back for
repairs.
Yellow LED flashes
at 4 Hz
Fault Relay at N.O
0-20mA at 0mA
Fault Detector
 Low Voltage
 Faulty Detector
 Check the voltage at the
detector; verify at least 24V
at the detector terminal.
 Send the detector back for
repairs.
Yellow LED flashes
at 4 Hz
Fault Relay at N.O
0-20mA at 2mA
BIT Fault
 Faulty Detector
 Clean detector window.
 Re-power the detector.
 Replace the detector.
Red LED
constantly on If no fire exists,
then, detector
alarm latched
Perform Reset to the detector.
Alarm Relay at On
0-20mA at 20mA Alarm condition  Check cause for alarm.
 If no alarm, re-power the
detector.
 Send the detector back for
repairs.