If a fire signal was not generated and the LEDs indicate
response by
neither
sensor, both sensors have failed to
respond.
— Check input power and external wiring.
— 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 the detector still does not respond, replace the
detector.
MANUAL oi
When manual
oi
is selected, the automatically initiated
oi
test is disabled.
Regardless of the
oi
selection, internal diagnostic
circuitry will respond to failures such as a loss of input
power or to certain electronic failures. These failures
will be indicated at the LCU and also by the detector’s
LEDs. If such a failure occurs, check the operation of
the power source and the continuity of the detector
wiring. If the detector appears to be “dead” with power
applied, it must be returned to the factory for repair.
AUTOMATIC oi
The Automatic
oi
feature (if selected) tests the detector
at the selected interval (once per minute for UV and
from once a minute to once every four hours for IR),
checking the cleanliness of the optical surfaces, sensor
sensitivity, and proper functioning of the electronic
circuitry. If a problem is detected for three consecutive
automatic
oi
tests, a fault signal is generated at the
LCU (also indicated by the UV sensor LEDs). If the
detector passes three subsequent automatic
oi
tests,
the fault signal will be cleared
UV Fault
To correct a UV
oi
fault, clean the viewing window and
oi
ring of the UV sensor, and also check the
oi
ring
opening for proper orientation. If the fault does not
clear (or fault reoccurs), a faulty sensor or electrical
problem is indicated. First replace the UV sensor
module. If the problem persists, replace the detector.
IR Fault
To correct an IR
oi
fault, clean the viewing window and
oi
ring of the IR sensor, and also check the module and
oi
ring opening for proper orientation. If the fault does
not clear (fault reoccurs), a faulty sensor or electrical
problem is indicated. Check the connection of the
connector plug on the IR module. Also check the
condition of the wires. Repair or replace if needed. If
the problem persists, replace the IR sensor module. If
the problem still persists, replace the detector.
General Fault
If a general fault is indicated, check input power to the
detector as well as continuity of system wiring. Also
check the detector viewing windows for contamination
such as paint overspray, snow, etc. that could
simultaneously affect both sensors. Since simultaneous
failure of both sensor modules is unlikely, the problem is
most likely caused by loss of input power or failure of
the detector’s electronic circuitry.
Background Radiation
Background radiation as such does not cause a
problem with the detector in most applications, unless
both UV and flickering IR non-fire radiation sources
occur simultaneously. If a UV or IR background
radiation indication occurs:
— Determine its cause. The presence of background
radiation could indicate a problem in the protected
area. For example, background IR could be
caused by overheating equipment.
— Determine whether or not repositioning the detector
could eliminate response to the background
radiation without reducing coverage of the
hazardous area.
IX-8
Содержание Eagle Quantum 95-8470-05
Страница 116: ...Figure A1 A 10...
Страница 122: ...Figure B1 B 6...
Страница 125: ...APPENDIX D D 1 95 8470...
Страница 128: ...LON is a registered trademark of Echelon Corporation Modbus is a registered trademark of Modicon Inc...