TAblE 2 – Troubleshooting Guide
Symptom
Possible Reason
Troubleshooting Procedure
Dehumidifier does not
turn on/run.
No power to unit.
• Check that the dehumidifier is plugged in.
• Check that the power switch is turned ON.
• Check that the control is turned ON.
• Check that the circuit breaker has not tripped.
Dehumidifier blower is
running but with little or
no airflow.
Pressure drop across dehumidifier
is higher than 0.6”w.c.
• Check dehumidifier air filter and wash or replace.
Dehumidifier blower is
running but compressor
is not.
Float switch open.
• If float switch installed, check connections at control board and empty condensate pan.
• If no float switch installed check that the jumper is installed at the float switch terminals
on the control board.
Coil frosting.
• Lack of or reduced airflow. Check dehumidifier air filter and wash or replace.
• Check that there is nothing blocking the inlet or outlet of the dehumidifier.
• Inlet air conditions below 60°F. Increase the humidity setting.
Inlet air temperature is outside of
the 50°F – 104°F range or the dew
point is below 40°F and there is a
demand for dehumidification.
• No action. The compressor will not run if inlet conditions are out of range.
Dehumidifier is not
draining properly.
Drain line blocked or unit not level. • Verify that the unit is level.
• Check the drain line blockages and for a continuous downward slope.
Dehumidifier is
producing hot air.
Normal function.
• Air is reheated across the condenser coil, resulting in a temperature rise between inlet
and outlet.
TROUblESHOOTING
(CONTINUED)
TAblE 1 – Diagnostic Codes (continued)
Diagnostic
Code
Failure Mode
Action
Reset
E7
Float Switch Open
1. Empty the condensate pan.
2. Check the float switch connection at the control board.
3. If not using a float switch, verify jumper is between float switch terminals on dehumidifier
control board.
4. If the problem persists, replace the float switch.
Self-Correcting
E8
Inlet Air Temperature
Out of 50°F – 104°F
range, or dew point
below 40°F
1. If temperature is out of range, no action, normal operation.
2. If air temperature is between 50°F –104°F with a dewpoint above 40°F, contact Technical
Support.
Self-Correcting
9
