Troubleshooting - Trane Comfort Control XB200 Manual

Trouble
Table 2
-shooting
Symptom
Display will not come on.
Temperature display is incorrect.
Cannot set Heating setpoint
above 80 degrees
"Service" Flashing on and off.
"Service" solid on and "--" in
temperature display.
Temperature setting will not
change. (Example: Cannot set
heating higher or cooling lower).
Page - 18
Pub. No. 22-5204-01

Troubleshooting

Possible Cause
1. Blown fuse or tripped circuit breaker.
2. Furnace power switch OFF.
3. Furnace blower compartment door or panel
loose or not properly installed.
Temperature display needs calibration.
Deadband between Heating and Cooling set to high
Control EEPROM write error.
Indoor temperature sensor open or shorted
1. Upper and/or lower temperature limits were
reached.
2. "Keypad locked" is displayed on LCD.
Action
1. Replace fuse or reset breaker.
2. Turn switch to ON.
3. Replace door panel in proper position to engage safety interlock or
door switch.
Calibrate Sensor - User Setup Step 49.
Decrease Deadband setting - User Setup Step 42.
Press any key and Check / Re-enter Setup Choices.
Replace Control
1. Check the temperature setpoints:
Heating limits are 40 - 85F.
Cooling limits are 65 - 90F.
2. Unlock keypad - press Up+Down arrow together until icon disappears.