Troubleshooting - Venstar T2900 Installation Instructions Manual

SECTION 8

TroubleShooting

SYMPTOM: The air conditioning does not attempt to
I2:00 74
Pm
C OOL turn on.
AUTO
72 H EAT
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 Setup
section to defeat the cycles per hour and
compressor timeguard.
8
SYMPTOM: The display is blank.
74
I2:00
Pm
CAUSE: Lack of proper power.
C OOL
AUTO
72 H
EAT
REMEDY: Make sure power is turned on to the furnace
and that you have 24vac between R & W. If C is
used, 24vac between R & C.
SYMPTOM: The air conditioning does not attempt to
I2:00 74
Pm
C OOL
AUTO
72 H EAT
turn on.
CAUSE: The cooling setpoint is set too high.
REMEDY: Consult the Owner's Manual in the Setup
section to lower the cooling setpoint limit.
SYMPTOM: The heating does not attempt to turn on.
I2:00 74
Pm
C OOL CAUSE: The heating setpoint is set too low.
AUTO
72 H
EAT
REMEDY: Consult the Owner's Manual in the Setup
section to raise the heating setpoint limit.
NOTE: Due to the Random Start feature, outputs may not energize for up to 30
seconds when the thermostat is first powered (see page 16.4 of the
Owner's Manual)
Page 8.1