Uline H-6621 Industrial Dehumidifier User Manual

• The breaker tripped.
• The unit is plugged into a GFI protected circuit.
• The unit is being run from a generator.
• The extension cord is not the correct gauge for the distance run. (14 AWG up to 25′ and 12 AWG over 25′)

• Reset breaker.
• Remove from area. Excessive moisture will trip GFI.
• Check output does not fluctuate, as the unit will not operate at low voltage.
• 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 okay without verifying.

• ER 1: Overflow switch remaining closed for over two minutes.
• Plugged or kinked drain hose.
• Bad connection in pump circuit.
• Defective condensate pump.
• ER 2: Internal pressure switch indicates refrigerant pressure is too high.
• Air filter is dirty or plugged. The coil is dirty.
• Loose or faulty electrical connections to pressure switch.
• Fan is not working.
• Defective pressure switch.

• Remove obstruction. Check
• connections. Replace pump.
• Clean or replace air filter. Clean coil.
• Check connections.
• Replace fan.
• Replace pressure switch.

NOTE: Some ice buildup on the evaporator coil is normal, but airflow should not be blocked.

• No warm air is blowing out of the back of the unit.
• Air filter is dirty and airflow is obstructed.
• Dirty evaporator coil.

• Ambient temperature may be too low. Raise temperature with supplementary source.
• Clean filter. Unit should have a minimum of 10″ clearance all around it.
• Clean coil.

• Air filter is dirty or airflow obstructed.
• Evaporator coil dirty.
• Restrictive or kinked exhaust ducting (if used).

• Unit should have a minimum of 10″ clearance all around it. Clean air filter and ensure adequate airflow/space around unit.
• Clean coil.
• Straighten out ducting.

• Loose connection in fan circuit.
• Fan obstructed and not turning.
• Defective fan.
• Defective control board.

• Check connections.
• Remove obstruction.
• Replace fan.
• Replace control board.