46
Troubleshooting
•
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 26).
•
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 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 26).
•
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 26).
•
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.
•
SYMPTOM:
When the Program button is pressed, the display
reads “DISABLED”.
CAUSE:
Program mode is set to
NON PROGRAM.
REMEDY:
Set Program Mode (Setup 1) to 1,
5/2,
or
7 Day.
See Selecting Your Program Mode (page 25).
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