If the flame detection system fails, isolate the fault to the flame detector and the cable between the
detector, and the cable. The following instructions provide general guideline for troubleshooting:
1. WDT LED Off :
2. No Signal
3. Alarm LED On
4. 4-20 MA at 0 ma
5. Brown Out Message on Termiflex
6. No Change in Profile
7. Flame LED On & Flame Relay Contact Open
8. Alarm LED Off & Relay Contact Open
9. Brown Out
If IDD detector is disconnected, ALM LED will turn on, but to differentiate with ALARM Condition, WDT
LED will be flashing along with ALM LED steady ON.
On Self check Cycle failure, only ALM LED will turn on.
TROUBLESHOOTING
4.2
Symptom
Indicator
Possible Cause
Remedy
Self Check
Cycle Fail
ALM LED ON
IDD CK FAIL Message
on Termiflex
IDD Signal Too High
(>3000) leading to Sensor
Saturation
Reduce Gain, Weight Factor,
Adjust sighting
Drop count (DO) too low
Increase Dropout count value
towards Pickup count.
High Gain Value / Weight
Factor Value
Reduce Gain / WF Value
50VDC bias LED1
Steady ON during
Check-cycle
50 V bias voltage does
not go to 0 VDC during
self-Check duration
Replace IDDX
Contact Forney Support
Sensor
Disconnect
ALM LED ON
&
WDT LED Flashing
Loss of IDD Detector
Signal
Check wires on J1 Connector.
Check quick disconnect of IDD
detector is secure.
Check Detector cable wiring
for continuity.
Loss of 15VDC.
LED11 is Off.
Replace IDDX
25
372001-24 Rev. A
IDDX Flame Detector Amplifier Manual