Use the Honeywell magnetic wand to activate the four software switches located around the LCD screen: Up , Down , Escape (X) , and Enter (✓) .
Allow the gas reading to return to zero before resuming normal monitoring mode to prevent false alarms at your controller. Troubleshooting Common Display Codes Xnx Universal Transmitter Quick Start Guide
The you are connecting (toxic, oxygen, or combustible) Use the Honeywell magnetic wand to activate the
| Fault Code | Description | Recommended Action | |------------|-------------|--------------------| | F112 | 24 VDC supply bad | Check wiring of 24V power supply to transmitter and sensor supply operation | | F113 | Sensor internal 5V power supply defect (Excel) | Remove and return to Honeywell for repair | | F116 | Optima lamp failure / Excel loop failure | Check that supply voltage is stable. Check wiring between Optima/Excel and the transmitter. Check loop impedance | | F117 | Sensor loop failure (losing/has lost mA signal) | Check switches S3 and S4 are set correctly. Power down before changing switch settings. Perform a Soft Reset after resolving the issue | | F118 | Excel real‑time clock issue | Reset date/time in Excel, recycle Excel power. If not retained, return to Honeywell for repair | | W002 / F103 | Temperature error | Check for heat sources. Install sun shield or relocate transmitter. Verify temperature reading in Info → Transmitter Status menu | | W022 | mV sensor calibration needed | Generated after accepting a new mV sensor or changing gas selection. Perform a span calibration | | W015 | Excel internal software error | Remove and return to Honeywell for repair | Check wiring between Optima/Excel and the transmitter
Apply the calibration gas at a flow rate of 300 to 500 mL/min. Allow the reading to stabilize (typically 1 to 2 minutes). Swipe to save the span calibration data.
Using the hex key provided (size 3mm), loosen the set screw on the main cover. Unscrew the cover counter-clockwise. Do not lose the O-ring—this is your environmental seal.