Issue
Step-by-step instructions for calibrating Space Temperature sensor on a Xenta 102-AX (or I/NET MR-VAV-AX) using the M/STAT.
Environment
Xenta 102-AX
MR-VAV-AX
M/STAT
Cause
The preferred method for calibrating temperature in Xenta 102-AX or MR-VAV-AX is through the plug-in. However, this is not always an option, especially when the responsibility for calibrating is given to a third party test and balance company. Pocket references exist for navigating through the M/STAT menu, but there aren't clear step-by-step instructions to tell exactly how to perform the calibration.
Resolution
Step 1: Connect M/STAT
- Plug the M/STAT into the jack on the thermostat. The initial display shows the set temperature.
Step 2: Enter Password
- Press the Service button. This prompts you to enter the service mode password. Default password is 183. Use the +/- keys to set each digit and the enter key to submit. If the password is incorrect, the display will blink.
Step 3: Operational Parameters
- If the password is correct, the first menu option – Unit Parameters (UP) – is displayed. Hit the select button down until Operational Parameters (oP) is displayed. Press enter.
Step 4: Calibrate Space Sensor
- Hit the select button until Calibrate Space Sensor (CSS) is displayed. Press enter to view the current value.
Step 5: Enter Actual Value
- Use the +/- keys to change the value beginning with the tenths of degrees. Press select to change to the degree and ten degree digits. When the display matches the Actual Value, press enter.
Step 6: Escape Service Mode
- Press the service key to escape out of the menu. If you are finished configuring the box, escape all the way back out of the service menu before disconnecting the M/STAT. Disconnecting in configuration mode can leave the stat displaying “00” or other incorrect numbers.
