User's Manual

69-2715EF—07 32
If you have difficulty with your thermostat, please try the following suggestions.
Most problems can be corrected quickly and easily.
Display is blank • Check circuit breaker and reset if necessary.
• Make sure power switch at heating and cooling system is on.
• Make sure furnace door is closed securely.
• Make sure C wire is connected (see page 5).
Cannot change
system setting
to Cool
• Check that System Setup screen “Your thermostat controls” or “Your
system type” is set to match your heating and cooling equipment (see
page 29).
Fan does not
turn on when
heat is required
• Check that System Setup screen “Your fan control” is set to match your
heating equipment (see page 28).
“Wait” appears
on the screen
• Compressor protection feature is engaged. Wait 5 minutes for the
system to restart safely, without damage to the compressor.
Heat pump
issues cool air
in heat mode, or
warm air in cool
mode
• Check your setting for System Setup screen “Type of changeover valve”
to make sure it is properly configured for your system (see page 28).
Heating or
cooling system
does not
respond
• Touch MODE to set system to Heat. Make sure the temperature is set
higher than the Inside temperature.
• Touch MODE to set system to Cool. Make sure the temperature is set
lower than the Inside temperature.
• Check circuit breaker and reset if necessary.
• Make sure power switch at heating and cooling system is on.
• Make sure furnace door is closed securely.
• If “Wait” is displayed, the compressor protection timer is on. Wait
5 minutes for the system to restart safely, without damaging the
compressor (see page 26).
Heating system
is running in
cool mode
• Check that System Setup screen “Your thermostat controls” or “Your
system type” is set to match your heating and cooling equipment (see
“System Setup Options (SETTINGS > System Setup)” on page 29).
Troubleshooting
Electrical Ratings
Terminal Voltage (50/60Hz) Max. Current Rating
W-O/B 20-30 Vac 1.0 A
W2 (Aux/E) 20-30 Vac 1.0 A
Y Cooling 20-30 Vac 1.0 A
Y2 Cooling 20-30 Vac 1.0 A
G Fan 20-30 Vac 0.5 A