820-0003
IPES IR3 Flame Detector
Operating Manual
Page
24
of
37
8.0 Troubleshooting
Troubleshooting
Table
If testing reveals a Fault condition or failure to detect a flame, follow the troubleshooting procedures in the
table below. The table describes a variety of possible failures and corrective actions.
If the troubleshooting procedures do not correct the problem, contact ESP Safety Inc.
Failure Symptoms
Possible Cause
Corrective Procedure
Red LEDs do not glow.
No power supply.
Detach the base with the cable entry from the
IPES‐IR3 enclosure and make sure that the
terminals are supplied with a voltage of 24±8
VDC.
Fault relay contacts are open;
signaling LEDs blink frequently.*
Optical interference (dust)
Clean the IPES‐IR3 window
with:
●
Commercially available optical lens
cleaning pads
●
Optical Lens Cleaning Solution and optical
grade suede chamois
●
Flushing the surface with Isopropyl
Alcohol
A clean soft cloth or cotton swab dampened
with Isopropyl Alcohol. After wiping the
surface with alcohol, wipe it again with a dry
cloth in order to remove residual film.
IPES does not react to the test
flame.
Optical interference (dust, or contaminated
with substances) preventing passage of
radiation to the detector.
Wipe the protection windows with a soft cloth
wetted with denatured isopropyl alcohol (IPA)
and then wipe with a clean dry cloth to remove
any residue of dirt.
The sensor module (“front” half of the detector) contains no user‐
serviceable components and should never be opened. The terminal
compartment is the only part of the enclosure that should be opened
by the user in the field.
