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 9
Status
Condition
Recommended Action
4-20 Fault
(Open Loop)
The 4-20 mA output loop is not functioning properly;
the output mA level does not match the output set
point of the device.
Check field wiring, termination points, and resistance of the 4-20
mA loop. Ensure that the 4-20 mA output terminal of the AutroPath
HC800 Receiver is connected to ground through an appropriate
sized load (see instruction manual for details).
RAM Fault
System RAM test failed.
Cycle power to the unit. (If problem does not clear, return to
factory.)
Data Flash
Fault
Data can no longer be read/written to flash memory
inside the processor.
Cycle power to the unit. (If problem does not clear, return to
factory.)
Flash CRC
Fault
Non-Volatile Memory Operation Failed.
Cycle power to the unit. (If problem does not clear, return to
factory.)
AFE Fault
Receiver gain circuit failed.
Cycle power to the unit. (If problem does not clear, return to
factory.)
Internal
Voltage Fault
Internal step-down power supply out of range condi-
tion.
Cycle power to the unit. (If problem does not clear, return to
factory.)
Active Signal
Saturated
Active sensor is receiving too much light intensity
from transmitter.
1. For installation with module separation distances between
5 and 40 meters, the range reduction aperture kit (supplied) is
required.
2. Transmitter lamp voltage should be lowered to reduce signal to
receiver.
Ref. Signal
Saturated
Reference sensor is receiving too much light intensity
from transmitter.
1. For installation with module separation distances between
5 and 40 meters, the range reduction aperture kit (supplied) is
required.
2. Transmitter lamp voltage should be lowered to reduce signal to
receiver.
Low Voltage
Supply voltage to AutroPath HC800 is less than 16V. Supply voltage needs to rise above 16V. Check supply voltage
and power wiring.
High Voltage
Supply voltage to AutroPath HC800 is greater than
33V.
Supply voltage needs to drop below 33V. Check supply voltage
and power wiring.
Heater Fault
Heater is not working.
Fault will clear if heater is configured to be off. If heater is required,
return to factory for repair.
Broken Link
If communication link is being used, communication
has been lost between receiver and transmitter.
(Annunciation of this status condition is configurable
and is disabled by default.)
Check field wiring and ensure that the Rx/TX communication link
lines are connected as specified in the instruction manual. Return
unit to factory if problem persists.
Failed Zero
Calibration
This fault will persist through power cycle until a suc-
cessful calibration is completed; calibration will time
out at 10 minutes
If the calibration process is allowed to time out, the fault is set and
can only be reset with a successful calibration.
Calibrate
Active
at Startup
Zero calibration line is pulled low during power up,
resulting in a Zero Calibration active during power-
up.
1. Check receiver wiring to verify any wired connection to terminal
6 (Reset/Cal) is not connected to ground.
2. Upon power-up of the unit, make sure a magnet is not
positioned very close to the receiver bulkhead area where
magnetic switch resides.
Beam Block
The receiver doesn’t see the light signal from the
transmitter continuously for 1 minute or the time set
by user (Min 1 minute, Max 6 hours, default 1 minute)
1. Clear beam obstruction.
2. Check alignment and re-align if necessary.
Low Signal
Indicated when the received light intensity is below
30% of full scale at gain 100
1. Clean windows of receiver and transmitter.
2. Check alignment and re-align if necessary.
Negative Drift
–9% of Scale
A constant under range condition where the gas
reading is at or below –10% of full scale reading for
a period of one minute or more. (Gas detection is still
enabled, but output reading will be lower than actual
gas concentration applied.)
1. Zero calibration in clean air environment.
2. Dense fog may be in beam path.
Over Range
Overange condition is indicated by a steady 20.5 mA
output, as this is maximum gas concentration that
will be displayed.
Gas is likely present in high concentration; react accordingly.
table 6—autropath Hc800 Receiver Fault conditions (continued)
