Line of Sight Infrared Hydrocarbon Gas Detector AutroPath HC800 , 116-P-HC800/IGB, Rev. A, 2016-03-03
P/N 95-8744, v4.2 , rev. 3/16
Autronica Fire and Security AS
Page 30
tRoublEShootinG
A Fault status is indicated by a yellow LED and also
by the 4–20 mA output. Refer to Table 9 for assistance
in correcting malfunctions with the AutroPath HC800
Detector.
REplacinG autRopath hc800
tRanSMittER/REcEivER ElEctRonicS
MoDulE
WarnInG
Do not open when an explosive gas atmosphere
may be present.
CautIon
only Autronica authorized personnel are allowed
to perform this repair.
CautIon
Replacement of the AutroPath HC800 transmitter
or receiver module requires disassembly of the
device housing. Remove power to the device
before disassembly.
CautIon
The AutroPath HC800 detector contains
semiconductor devices that are sensitive to
electrostatic discharge (eSD). Use normal
precautions for handling eSD sensitive devices.
Handle the device by the housing, taking care not
to touch electronic components or terminals.
Fault Condition
Corrective Action
Low 24 volts
24 Vdc operating voltage is out of range. Verify proper wiring to the detector and correct voltage
output from the power source. Power supply faults are self-clearing when the condition is corrected.
If the fault does not clear, consult the factory.
Dirty Optics
Perform cleaning procedure, then recalibrate as required. (Refer to “Maintenance” for details.)
Calibration Fault
If the calibration process is allowed to time-out, the fault is set and can only be reset with a
successful calibration.
Negative Signal Output
This fault is indicated when the signal output drops below –0.5 LFL-m. Normally detection capability
is not compromised in this condition.
The device was probably zero calibrated with background gas present.
If the condition persists, purge with clean air and repeat the zero calibration. Ensure that the heaters
are on and the windows are not fogged.
Calibration line active at start-
up
The only way to clear this fault is to correct the wiring and reapply power.
Be sure that the calibration line is not shorted and that the calibration switch is open. If the fault does
not clear, consult the factory.
Signal Saturation
Add aperture to the transmitter module or adjust lamp voltage if needed.
EE Error
Return unit to the factory.
Other Faults
Consult the factory.
table 9—troubleshooting Guide
