Unit Is Operating And Blows Evaporator Air; Room Temperature Too Cold (Below 51 Degrees) When Unit Is Running; Room Temperature Too Cold (Below 51 Degrees) When Unit Is Not Running; Humidity Too Low Or Supply Air Is Too Cold, Without Optional Humidifier - Wine Guardian PRO Series 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 room
Possible Cause
Thermostat not set up
properly
Compressor not operating
Condenser airflow is blocked

Room temperature too cold (below 51 degrees) 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 too cold (below 51 degrees) when unit is not running

Possible Cause
Too much heat loss to adjacent spaces

Humidity too low or supply air is too cold, without optional humidifier

Possible Cause
Not enough evaporator airflow
Defective thermal expansion valve
Temperature set too cold
Solution
Check thermostat setup in the
manufactures operations guide
High pressure switch open (button up)
Remove blockage
Clean filter and coil (if needed)
Head Pressure (HP) switch is open
Reset HP switch See reset instructions on pg. 60
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
Solution
Remove blockage in supply or return ductwork
Check and clean filter and coil
Coil frozen – shut off unit for two hours
If under warranty call for service
If not under warranty call a refrigeration
technician
Raise temperature setpoint
52