Troubleshooting - York LX series Owner's Manual

TroubleShooting

SYMPTOM: The air conditioning does not attempt to turn on.
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Outdoor H S
85 EAT ET 68 CAUSE: The compressor timer lockout may prevent the air
COOLER MODE WARMER
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.
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H S
Outdoor EAT ET CAUSE: Lack of proper power.
85 68
COOLER MODE WARMER
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.
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Outdoor H EAT ET S CAUSE: The cooling setpoint is set too high.
85 68
COOLER MODE WARMER
REMEDY: Lower the cooling setpoint or lower the cooling set-
point limit. See Setpoint Limits (page 22).
SYMPTOM: The heating does not attempt to turn on.
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Outdoor H EAT ET S CAUSE: The heating setpoint is set too low.
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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
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Outdoor H EAT ET S
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asking for cooling, the heat comes on.
COOLER MODE WARMER
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
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Outdoor EAT ET H S
85 68 come on.
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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
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85 68 reads "DISABLED".
COOLER MODE WARMER
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 21).
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