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TROUBLESHOOTING TIPS
SYMPTOM ACTION TO TAKE
1. Check power to the thermostat Thermostat Dead
2. Check wiring diagrams
SYMPTOM ACTION TO TAKE
1. Check for break in W or Y wire
2. Allow minimum off time to pass
3. Check system options for correct settings
4. If arrow is blinking, wait until startup delay expires
5. Mode is Off (Select Heat, Cool, or Auto)
Heat Or Cool Inoperative
6. Remote system is overriding thermostat
SYMPTOM ACTION TO TAKE
1. Check wires and connections to the section marked “Comm”
2. Check thermostat address setting
3. Check communications mode setting
Control By Remote System
Not Working
4. Check setup of the remote system
Ensure that all setup items for the thermostat and the remote system are set to the proper
configurations for communication
SYMPTOM ACTION TO TAKE
1. Allow 30 minutes for thermostat to adjust.
2. Adjust calibration offset
Temperature Reading
Incorrect
3. Change setup option to display
o
F or
o
C
After installation, allow the thermostat up to 30 minutes for an accurate temperature reading
SYMPTOM ACTION TO TAKE
Display Problem 1. Cycle power to the thermostat (R).
SYMPTOM ACTION TO TAKE
1. Heat Pump is not able to meet load due to cold weather Aux Heat On Too Often
2. Thermostat is in EM Heat mode – Set thermostat to Heat or
Auto mode
In EM Heat mode, only the auxiliary heat is turned on
SYMPTOM ACTION TO TAKE
Heat Pump Heats In Cool
Mode & Cools In Heat Mode
1. Reversing valve is connected to wrong terminal - move
wire from B to O or from O to B
The wires connecting the reversing valve may be reversed - (See Note 1 - Page 9)