XNX Universal Transmitter Quick Start Guide
71
Fault Description
Appli-
cable
Sensors
Latching/
Non-Latch-
ing
Frequencyof
Diagnostic
EventHistoryData ActionForResolution
F108
XNX mA Output
Loop Failure
All Latching 2 seconds
mA output error (measured mA
- set mA)
Check wiring of mA output from XNX.
Check that switches S1 and S2 are set
correctly. Note that if F108 is not resolved
quickly, an F149 (Internal Communica-
tion Failure - mA) will also be generated.
When the cause of F108 is resolved, both
the F108 and F149 will be cleared.
F109
Simulated Warning/
Fault
All Non-latching Enabled by user 0
Performing an alarm/fault reset will clear
all simulation.
F110
Sensor software
mismatch
Optima Latching
Only checked at
power up
Sensor firmware version x10
Contact Honeywell Analytics’ Service
Department.
F111
Negative Drift ECC, mV Non-latching 2 seconds
Raw gas concentration of
sensor
Check sensor location for external
interference. Perform zero calibration. If
problem persists after zero calibration and
no interference exists, replace sensor.
Negative Drift; may
indicate a failed IR
sensor
Optima,
Excel
Non-latching
XNX polls sen-
sor every 2 sec-
onds, diagnos-
tic frequency
controlled by
sensor
Sensor fault or warning code
Check sensor location for external
interference. Perform zero calibration. If
problem persists after zero calibration and
no interference exists, replace sensor.
F112
Sensor 24 VDC
Supply Bad
Optima,
Excel
Non-latching
XNX polls sen-
sor every 2 sec-
onds, diagnos-
tic frequency
controlled by
sensor
Sensor fault or warning code
(Note 4)
Check the wire of the 24V power supply
to the transmitter and the power supply
operation. Also check the wiring between
the transmitter and the Optima/Excel.
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