4
TROUBLESHOOTING
The Unit is NOT working:
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Why do you believe the dehumidifier is not working?
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Is the power ON?
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Has the breaker tripped? – Reset breaker
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If in a wet area, is the unit plugged into a GFI protected cir-
cuit? – Excessive moisture will trip GFI. Remove from area.
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Is the unit being run off a generator? - Check output does
not fluctuate as the unit will not operate at low voltage.
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If using an extension cord - Is the cord of the correct
gauge for the distance run? (14 AWG up to 25’ and 12
AWG over 25’). Note: Verify voltage while unit is starting.
Start up will cause the highest current draw and largest
voltage drop. Even if plugged directly to outlet there can
be a significant voltage drop. Never assume the voltage is
ok without verifying.
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Is the unit draining? – Check the condensate receptacle.
If full, the float is up and the unit will not operate – drain
receptacle.
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Overpressure switch tripped. Check for fan failure or high
ambient temperature. Display panel indicates defrost.
The unit continually ices up: Note that some ice buildup on the
evaporator coils is normal but airflow should not be blocked.
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Is the fan working? – Fan not working, check run capacitor
and fan unit.
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Is warm air blowing out the front of the unit? - No warm
air, temperature may be too low. Raise temperature with
supplementary source.
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Is the air filter clean and airflow unobstructed? – Clean
filter. Unit should have a minimum of 10” clearance all
around it.
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Dirty evaporator coils? – Clean coils.
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Defrost thermostat loose or not working? – Secure or
replace.
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Defrost timer set incorrectly or defective? – Reset or
replace.
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Temperature in the operating space is too low? - Raise
temperature with supplementary source.
Unit moves some water but not as much as expected:
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Air temperature and Relative Humidity have dropped - Check
levels with calibrated humidity meter and/or thermostat.
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Unit is in defrost cycle – Unit will start after cycle.
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Air filter dirty or airflow obstructed - Unit should have a
minimum of 10” clearance all around it. Clean air filter and
ensure adequate airflow/space around unit.
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Evaporator coils dirty – Clean coils.
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Restrictive or kinked exhaust ducting (if used) – Straighten
out ducting.
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Defrost timer set incorrectly for conditions – Reset timer.
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Defrost thermostat defective - Replace
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Refrigerant charge is low – Have unit checked by qualified
technician
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Defective compressor – Replace compressor by qualified
technician as it requires recycling of refrigerant.
Unit runs continuously for days:
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Unit is working removing water - High Relative Humidity
in space.
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Humidity or water is getting into the space – Find source
and stop it.
•
Unit is undersized for space – Use larger unit or mul-
tiple units.
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Poor air movement in space – Use air movers to
increase movement.
Unit runs but does not pump water:
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Drain hose kinked or blocked – Straighten or unblock hose.
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Pump float stuck closed – Reset or replace.
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Pump not working – Check electrical operation with out-
side supply.
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Hose disconnected internally – Reconnect hose.
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Compressor capacitor bad – Check capacitor.
Fan runs but Compressor does not:
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Condensate pump not working – Check pump and float.
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Bad connection in pump circuit – Check connections.
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Bad compressor capacitor – Check capacitor.
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Defective control board – Replace.
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Defective compressor – Replace compressor by quali-
fied technician.
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Defective time delay or Thermistor – Check and/or replace.
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Defective pressure switch – Check and replace.
Fan does not run. Compressor runs briefly but cycles on/off:
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Defective fan capacitor – Check capacitor.
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Loose connection in fan circuit – Check connections.
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Fan obstructed and not turning – Remove obstruction.
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Defective fan – Replace fan.
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Defective control board – Replace control board.
