January, 2016 120-59
Model F120 UV/IR Flame Detector
Remove the front housing and return to Safety Systems Technology for evaluation, repair
or replacement. SEE “Repairs” section of the manual for instructions on how to return
the unit to be repaired.
Make sure to remove the electronics module and wrap it in a static free bag and keep in a
dry, cool place until a new front housing can be installed.
During Normal Operation
There are several factors that may trigger a system fault:
• The Automatic Self-Check has detected a dirty lens. Clean the outside surface of the
viewing lens of any accumulated dust, dirt, lm or debris.
SEE “Maintenance” section of the manual for instructions on how to clean the lens of the
detector.
• A problem with the power supply. The 24 volt DC power supplied to the detector may be
less than 20 volts or greater than 35 volts. Replace or service the power supply.
• An internal failure has occurred in the electronics module. Replace the electronics
module and send to factory for repairs.
• The Automatic Self-Check has become inoperable.
To determine if the Automatic Self-Check has become inoperable, use a UV/IR test
lamp to test if the detector is still working. Ensure that the lens is free from any dust or
debris. The green Power and yellow Fault LED lights will be on. If the detector pass the
operation test, this could mean that the Automatic Self-Check has stopped working. The
front housing has to be repaired or replaced as the Automatic Self-Check is located in
this part of the detector.
Remove the front housing and return to Safety Systems Technology for evaluation, repair
or replacement. SEE “Repairs” section of the manual for instructions on how to return
the unit to be repaired.
Make sure to remove the electronics module from the rear housing and wrap it in a
static free bag and keep in a dry, cool place until a new front housing can be installed.
Deactivate power to the detector while the unit is inoperable.
After Cleaning the Lens
The Automatic Self-Check may report a Fault immediately after the lens of the detector
has been cleaned. This may result from using Windex or other commercial grade glass
cleaners. Use of these cleaners inhibit the transmission of UV or IR signals to the sensors.
Only use water or alcohol to clean the lens of the detector.
SEE “Maintenance” section of the manual for instructions on how to clean the lens of the
detector.
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