Unit Is Operating And Blows Evaporator Air, But The Supply Air Is Not Colder Than The Return Air From The Cellar; Problems Controlling Cellar Temperature - Wine Guardian WG15 Installation, Operation And Maintenance Manual

Unit is Operating and Blows Evaporator Air, but the Supply Air
is not Colder than the Return Air from the Cellar
Possible Cause
Thermostat not set up properly
Compressor not operating
Condenser airflow is blocked
Head Pressure (HP) switch is open

Problems Controlling Cellar Temperature

**Problems are occurring even though the unit seems to be fully operational – evaporator fan
blows air into the cellar and compressor and condenser fans run
Cellar temperature is low (below 51° when
unit is running
Possible Cause
Thermostat set too low on cooling
Thermostat not controlling temperature
Cellar temperature is too cold (below 51°)
when unit is not running
Possible Cause
Too much heat loss to adjacent spaces
Cellar temperature is too high, but supply
air is cold
Possible Cause
Not enough evaporator airflow
Cellar heat loads are too high
Solution
Check thermostat setup in the manufacture's
thermostat guide
High pressure switch open (button up) (see
below)
Remove blockage
Clean coil (if needed)
Reset HP switch – see reset instructions on
page 37
Solution
Reset thermostat to higher cooling temperature
Wiring integrity compromised (shorted),
replace wiring
Solution
Increase insulation around the ductwork and
doorways
Add heater
Solution
Remove blockage in supply or return
Check and clean coil
Coil frozen – shut off unit for two hours
Install additional insulation
Replace with larger sized unit
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