Honeywell XNX Fixed Gas Detector Warnings and Errors Codes
XNX warning and fault codes indicate a range of issues with the device and its connected sensors. These can include communication failures, sensor faults, calibration errors, and system-related problems. Each code requires specific troubleshooting steps to resolve. Below are the warnings and error codes you may encounter for the Honeywell XNX Fixed Gas Detector:
Troubleshooting the Honeywell XNX Fixed Gas Detector
Before addressing individual fault codes, try the following:
- Soft Reset
Some faults (e.g. F161) can be cleared by performing a soft reset via the XNX calibration menu. - Check Wiring
Many faults are caused by poor or incorrect wiring between the XNX and connected sensors (such as Optima Plus or Excel). - Calibration
Warning messages may indicate that calibration is overdue. Recalibrate the instrument as required. - Sensor-Specific Checks
For sensor-related issues, refer to guidance for the specific sensor type (e.g. EC or IR).
Fault Codes
F106: Real Time Clock Failure
Indicates an incorrectly set clock or a failing internal battery. If the battery has failed, the XNX POD may need replacing.
Note: Due to firmware limitations, the clock will stop running on 1 January 2036.
F161: mA Input Fault
Typically caused by a faulty mA signal from a connected sensor.
Troubleshooting:
- Check wiring connections
- Perform a soft reset
- Replace the sensor if required
F158: Sensor/Personality Part Number Mismatch
Indicates a mismatch between the installed sensor and the transmitter configuration.
Action: Ensure the sensor part number matches the XNX configuration.
Fault 2: Cell Failure
Indicates an issue with the sensor cell.
Action: Check connections and replace the sensor if necessary.
Fault 3: Negative Reading
Suggests a calibration issue.
Action: Recalibrate the unit.
Fault 4: EEPROM Corruption
Indicates corrupted internal memory.
Action: Reconfigure the unit using the mobile app. If the issue persists, contact support.
Fault 9: Sensor Fault (CH:xx)
Indicates a sensor failure.
Action: Check wiring and replace the detector if required.
Fault 10: mA Output Error
Indicates a fault with the mA output module.
Action: Replace the module.
Fault 11: Relay Output Error
Indicates a relay module failure.
Action: Replace the relay module.
Fault 12: Detector In Fault
Indicates a detector-related issue.
Action: Check detector connections.
Warning Codes
W001: Power Supply / Operation Warning
Indicates issues with power supply or general operation.
Action: Check power input and consider adding environmental protection (e.g. sunshade).
W002: Temperature Warning
A short (2-second) warning indicating excessive temperature.
Action: Relocate the XNX or improve ventilation to prevent overheating.
W006: Sensor Warning
Indicates a potential sensor issue, possibly due to interference or sensor-specific faults (e.g. Optima Plus or Excel).
W009: Sensor / Diagnostic Warning
Indicates a sensor fault or diagnostic frequency issue.
Action: Check wiring and ensure the correct sensor type is installed.
