Slimline LS
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TROUBLESHOOTING GUIDE
Ice is forming on the evaporator coil
Possible Cause
Solution
Evaporator coil is dirty
Clean coil with a vacuum brush attachment or blow out with
compressed air
There is something blocking the supply and/or return air
Remove blockage
Evaporator fan is not turning on
Call a service tech to troubleshoot
If unit continues to ice
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.
Unit does not run/power up
Possible Cause
Solution
Unit is not plugged in
Make sure the unit is plugged into an outlet
Line voltage rating is incorrect for the system
Check line voltage to make sure it is 110V-120V
Room temperature equals the setpoint on the controller
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
The temperature of the room to which the unit is exhausting exceeds
85°F. Make sure the exhaust area behind the unit is well ventilated. If
you are unsure about ventilation, call customer service at
1-800-343-9463
Intake temperature must drop below 85°F
The unit is undersized for the room
Order correctly sized unit
There is something blocking the supply and/or return air on
evaporator or condenser side of the unit
Unit is mounted too low in the room
Relocate unit so the distance from the ceiling and top of the unit is
no more than 18 inches
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
Poor seal around door
Make sure there are no air gaps around the door. If door seal is
damaged, replace it.
Setpoint too high
Lower the setpoint
Evaporator coil is frosted or iced up
Observe ice formation pattern. If only part way up the coil face,
the unit could be low on refrigerant. If so, contact your installing
technician to assist with troubleshooting.
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)
