Wifi 9000 Installation Guide

69-2815EFS—05 10
Troubleshooting
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.
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.
Fan does
not turn on
when heat is
required
• Check that System Setup screen “Your fan control” is set to match your
heating equipment.
“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 <?>).
Heating or
cooling system
does not
respond
• Touch SYSTEM to set system to Heat. Make sure the temperature is set
higher than the Inside temperature.
• Touch SYSTEM 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.
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 .