Manual

Unit is operating and blows evaporator air,

but the supply air is not colder than the return air from the cellar

Possible Cause Solution

Thermostat not set up properly Check thermostat setup on page 37

Compressor not operating High pressure switch open (button up)

Alarm will appear on thermostat

Condenser airflow is blocked Remove blockage

Clean filter and coil (if needed)

Head pressure (HP) switch is open Reset HP switch

See reset instructions on page 55

page 53

Cellar Temperature too cold (below 51°) when unit is running

Possible Cause Solution

Thermostat set too low on cooling Reset thermostat to higher cooling

temperature

Heating coil (optional) not operating Check for temperature rise across coil

Thermostat set too low on heating Reset thermostat to higher heating

temperature

Thermostat not controlling temperature Thermostat mounted in improper location

Cellar Temperature is too cold (below 51°) when unit is not running

Possible Cause Solution

Too much heat loss to adjacent spaces Increase insulation around the ductwork

Check and clean filter and coil

Coil frozen – shut off unit for two hours

Cellar loads are too high Install additional insulation

Replace with larger sized unit

Problems Controlling Cellar Temperature

NOTE: Problems are occurring even though the unit seems to be fully operational

evaporator fan blows air into the cellar and compressor and condenser fan runs.