Unit Is Operating And Blows Evaporator Air; Problems Controlling Cellar Temperature; Cellar Temperature Too Cold (Below 51°) When Unit Is Running; Room Temperature Is Too Cold (Below 51°) When Unit Is Not Running - Wine Guardian DP25 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
thermostat guide
Compressor not operating
Condenser airflow is blocked
Clean filter and coil (if needed)
Head pressure (HP) switch is open
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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.
Cellar Temperature too cold (below 51°) when unit is running
Possible Cause
Thermostat set too low on cooling
Heating coil (optional) not operating
Thermostat set too low on heating
Thermostat not controlling temperature
Room Temperature is too cold (below 51°) when unit is not running
Possible Cause
Too much heat loss to adjacent spaces
Cellar loads are too high
Solution
Check thermostat setup in the manufactures
High pressure switch open (button up)
Alarm will appear on thermostat
Remove blockage
Reset HP switch
See reset instructions on page 57
Solution
Reset thermostat to higher cooling
temperature
Check for temperature rise across coil
Reset thermostat to higher heating
temperature
Thermostat mounted in improper location
Solution
Increase insulation around the ductwork
Check and clean filter and coil
Coil frozen – shut off unit for two hours
Install additional insulation
Replace with larger sized unit
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