Honeywell VISIONPRO TB8220U Installation Instructions Manual page 15

Symptom
Fan does not turn on in a call
for heat (electric furnace).
Heating equipment is running
in the cool mode.
Heating equipment does not
turn off and heat temperature
setting is set below room
temperature (Heat On is not in
the display).
Cannot set the system setting
to Heat.
Cannot set the system setting
to Cool.
Heat On is not in the display.
Cool On is not in the display.
Wait is in the display.
TB8220U COMMERCIAL VISIONPRO™ PROGRAMMABLE THERMOSTAT
Table 7. Troubleshooting. (Continued)
Possible Cause
Fan Control in Heating is set to Gas or
Oil Furnace (Setting 0180).
Heating equipment is not a heat pump
but System Type (Installer Setup
Number 0170) is set to Heat Pump.
Heating equipment is not a heat pump
but System Type (Installer Setup
Number 0170) is set to Heat Pump.
System Type (Installer Setup Number
0170) is set to Cool Only.
System Type (Installer Setup Number
0170) is set to Heat Only or Heat Only
with Fan.
System setting is not set to Heat and/or
temperature setting is not set above
room temperature.
System setting is not set to Cool and/or
the temperature setting is not set below
room temperature.
Compressor minimum off timer is
active.
Set Fan Control in Heating to Electric
Furnace (Setting 0180).
Set System Type (Installer Setup Number
0170) to match the installed heating and/or
cooling equipment.
Set System Type (Installer Setup Number
0170) to match the installed heating and/or
cooling equipment.
Set System Type (Installer Setup Number
0170) to match the installed heating and/or
cooling equipment.
Set System Type (Installer Setup Number
0170) to match the installed heating and/or
cooling equipment.
Set the system setting to Heat and set the
temperature setting above the room
temperature.
Set the system setting to Cool and set the
temperature setting below the room
temperature.
Wait up to five minutes for the cooling or
heating (heat pump) equipment to turn on.
15
Action
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