Sears GT Series Installation Instructions Manual page 34

UNIT S HORT Unit o versized Recalculate heating and orcooling loads.
CYCLES
Thermostat Thermostat installed near asupply airgrill; r elocate thermostat.
Readjust heat a nticipator.
Wiring a nd Check fordefective orimproperly calibrated low pressure switch.
controls
INSUFFICIENT Unit u ndersized Recalculate heating and orcooling loads. Ifexcessive, possibly adding
COOLING OR insulation and shading will
r ectify the problem
HEATING
Loss of Check for leaks in duct work or introduction of ambient air through
conditioned air by doors or windows
leakage
Airflow Lack of adequate air flow or improper distribution of air. Replace dirty
Refrigerant Low on refrigerant charge causing inemcient operation
charge
Compressor Check for defective compressor, if discharge is too low and suction
pressure is too high, compressor is not pumping properly. Replace
compressor.
Reversing Valve Defective reversing valve creating bypass of refrigerant from discharge
of suction side of compressor. Replace reversing valve
Operating Compare unit operation pressures to the pressure/temperature chart
pressures for the unit.
TXV Check TXV for possible restriction or defect. Replace if necessary.
Moisture, The refrigerant system may be contaminated with moisture or
noncondensables noncondensables. Reclaim refrigerant, replace filter dryer, evacuate the
refrigerant system, and recharge with factory recommended charge.
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