44 • T3A Transmitter
product’s service life. The presence of such substances in an area does not preclude the use of
this device, but the likelihood of the shortened lifetime of the sensor element, as a result,
should be noted. Use of the T3A in these environments may require more frequently
scheduled maintenance to ensure safe and reliable system performance.
Troubleshooting
The troubleshooting guide describes symptoms, probable causes, and recommended action for
problems you may encounter with the T3A.
NOTE:
This troubleshooting guide describes T3A problems only. See the controller
operator’s manual for problems you may encounter with the controller.
Desiccant Replacement
Each T3A comes with a desiccant bag installed in the junction box. The contents are blue
when it is dry. As the desiccant absorbs moisture, it turns amber. Periodically check the
desiccant and replace it if it has turned amber.
T3A Fault Codes
Problem
Cause(s)
Solution(s)
F1
Check
Sensor
Cable
The control board has lost
communication with the digital
sensor interface adapter board.
1. Check connection between the
sensor housing connector header
and the digital sensor interface
adapter board plug-in.
2. Replace the sensor interface
adapter board
F4
Check
Sensor
Board
The control board has lost
communication with the sensor
interface board.
1. Replace the sensor interface board.
F5
Try to
Zero
Again
The unit did not zero correctly,
due to:
• the presence of gas,
• a sensor error, or
• a sensor interface board error.
1. Re-zero the device in clear air.
2. Replace the sensor element.
3. Replace the sensor interface board.
F6
Try to
Calibrate
Again
The unit did not calibrate
correctly, due to:
• the absence of gas,
• a sensor error, or
• a sensor interface board error.
1. Recalibrate the sensor element and
verify that gas is present during
calibration.
2. Replace the sensor element.
3. Replace the sensor interface board.
* System faults will activate the fault terminal on the device.