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TroubleShooting
SYMPTOM: The air conditioning does not attempt to turn on.
CAUSE: The cooling setpoint is set too high.
REMEDY: Lower the cooling setpoint or lower the cooling set-
point limit. See Setpoint Limits (page 22).
SYMPTOM: The air conditioning does not attempt to turn on.
CAUSE: The compressor timer lockout may prevent the air
conditioner from turning on for a period of time.
REMEDY: Consult the Owner's Manual in the Installer Setup
section to defeat the Cycles Per Hour (page 22).
SYMPTOM: The display is blank.
CAUSE: Lack of proper power.
REMEDY: Make sure the power is on to the furnace and that
you have 24vac between R & C.
SYMPTOM: The heating does not attempt to turn on.
CAUSE: The heating setpoint is set too low.
REMEDY: Raise the heating setpoint or raise the heating set-
point limit. See Setpoint Limits (page 22).
SYMPTOM: When controlling a residential heat pump, and
asking for cooling, the heat comes on.
CAUSE: The thermostat reversing valve jumper is set for “B”.
REMEDY: Set the reversing valve jumper for “O”.
SYMPTOM: When calling for cooling, both the heat and cool
come on.
CAUSE: The thermostat equipment jumper is configured for
“HP” and the HVAC unit is a Gas/Electric.
REMEDY: Set the equipment jumper for “Gas”.
D_TSTATD2200C-2_Manual_HR.pdf 34 8/29/13 1:11 PM
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