Carrier 33CS450-01 Owner's Manual download pdf (Page 23)

Carrier

Page 8.1

SECTION 8

TroubleShootingTroubleShooting

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 Setup

section to defeat the cycles per hour and

compressor timeguard.

SYMPTOM: The display is blank.

CAUSE: Lack of proper power.

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

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.

CAUSE: The heating setpoint is set too low.

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)

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Carrier 33CS450-01 Owner's Manual Page 23