When manual
oi
is selected, the detector is tested
either by pressing and holding the manual
oi
button
(if installed) or by shining a W867 Test Lamp into the
detector viewing windows. The “Startup and
Checkout Procedure (Manual
oi
Test)” section of this
manual explains this procedure. For problems
encountered during the manual
oi
test, refer to Table
6 - Manual
oi
Troubleshooting.
AUTOMATIC
oi
SELECTED
The Automatic
oi
feature (if selected) tests the detec-
tor approximately once each minute, checking the
cleanliness of the optical surfaces, sensor sensitivity,
and proper functioning of the electronic circuitry.
Proper operation of the detector is indicated by simul-
taneous blinking of both the UV and IR sensor LEDs
every 5 seconds. If a problem is detected for three
consecutive automatic
oi
tests, a fault signal is gen-
erated. If the detector passes three consecutive
automatic
oi
tests, the fault signal will then be
cleared. If a detector fault is indicated, observe the
detector LEDs as well as the status of the detector
relays, then refer to Tables 1 and 7 for status and
troubleshooting information.
Perform the “Startup and Checkout Procedure
(Manual
oi
Test)” in this manual to verify the proper
operation of the Fire relay and LEDs.
FIELD TESTING UV/IR DETECTORS
Det-Tronics UV/IR flame detectors contain sensitive
electronic components (ICs, transistors, etc.) that can
be damaged by electrostatic discharge (ESD).
Common causes of damage include improper han-
dling during installation/service, ground faults, power
supply transients, and lightning strikes. All Det-
Tronics systems are designed with extensive protec-
tion circuitry, however, damage can still occur.
The following field test procedure has been devel-
oped to test Det-Tronics UV/IR flame detectors for
ESD-damaged components:
1.
Disable (bypass) all automatic fire extinguishing
and shutdown equipment prior to testing. If the
detector is part of a Det-Tronics controller-based
system, simply move the controller key switch to
the Test mode.
11
95-8385
Condition
Indication
Corrective Action
Normal operation with
Fault relay de-energized
Check the operation of the power source and the
manual
oi
test not
LEDs not blinking
continuity of the detector wiring. If the detector appears
initiated
to be “dead” with power applied, remove power and
(Manual
oi
Selected)
replace the motherboard.
Manual
oi
Test
Fire relay did not energize
The other sensor has failed to respond.
and the LEDs of only one
• Check the cleanliness of the viewing window and
sensor are illuminated
repeat the test.
• If the sensor fails to respond again, replace the sensor
module.
• If the sensor still does not respond, replace the
motherboard.
Manual
oi
Test
Fire relay did not energize
Both sensors have failed to respond.
and the LEDs of neither
• Check input power and external wiring.
sensor are illuminated
• Check the cleanliness of both viewing windows.
If the detector still does not respond:
• If using a test lamp, check the battery, window, etc. to
be sure that the test lamp is working properly.
• If using the manual
oi
switch, check the switch for
proper operation and wiring.
If the detector still does not respond, replace the
motherboard.
Table 6—Manual
oi
Troubleshooting
