www.cellarcool.com | Page 23
OPTIMUM SERIES
TROUBLESHOOTING GUIDE
Unit has ice forming on the evaporator
Possible cause
Solution
Evaporator coil is dirty
Clean coil with a vacuum. If coil is very dirty, use a spray bottle with a
small amount of liquid dish detergent. Spray coil, let set for 5 minutes,
then flush with fresh water.
Something is blocking the supply and/or return air
Remove blockage
Evaporator fan is not turning on
Call installing technician to troubleshoot
The temperature of the room to which the unit is exhausting has
dropped below 50°F
Raise the temperature of the exhaust room
Unit has not gone through an Anti-Frost Cycle
Check for ice in the depth of the coil. Melt with blow drier until coil is
warm to the touch. Soak up water with a towel.
Unit continues to ice
Observe ice formation pattern. If only part way up the coil face, unit
could be low on refrigerant. If all the way up, the coil may be dirty or
airflow is blocked.
Unit does not run/power up
Possible cause
Solution
Unit is not plugged in
Make sure the unit is plugged into an outlet
No power to outlet
Contact an electrician
Line voltage is incorrect rating for unit
Check line voltage to make sure there is 110V-120V
Room at setpoint
Lower setpoint
Thermostat not calling for cooling
Lower setpoint
Faulty thermostat or wiring
Call Customer Service at 1-800-343-9463
Cellar temperature is too warm
Possible cause
Solution
Temperature of the room unit is exhausting to has exceeded 85°F
Intake temperature needs to drop below 85°F
Unit is undersized for the cellar
Order correctly sized unit
Something is blocking the supply and/or return air on evaporator or
condenser side of the unit
Remove airflow obstruction
Unit is mounted too low in the cellar
Relocate unit so the distance from the ceiling and top of the unit is no
more than 18”
One or more of the fans is not turning on
Call Customer Service at 1-800-343-9463
Compressor is not turning on
Call Customer Service at 1-800-343-9463
Compressor keeps cycling on overload
Make sure all fans are working and there is no airflow obstruction
Poor seal around door
Make sure there are no air gaps around the door. If door seal is
damaged, replace it.
Controller set too high
Lower the setpoint
Evaporator coil is frosted or iced up
Observe ice formation pattern. If only part way up the coil face, unit could
be low on refrigerant. If so, call Customer Service at 1-800-343-9463.
System runs constantly
Possible cause
Solution
Leaky door seal or poorly insulated cellar
Fix leaky door seal and insulate cellar in accordance with this manual
(page 8)
