Installation Guide

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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 0.4"
WC for Model
E080 or 0.6" WC
for Model E100/
E100H.
• Check dehumidifier air filter and wash or replace.
• Check for blocked ductwork and clear.
• Verify that the outlet collar with backflow damper is installed on the
outlet side of the dehumidifier.
• Check if backflow damper is blocked or stuck and remove obstruction.
Dehumidifier
blower is running
but compressor
is not.
Float Switch
open (E7 appears
on display).
• If float switch is installed, check connections at control board and
empty the condensate pan.
• If no float switch is installed, check that the jumper is installed at the
float switch terminals on the control board.
Unit is defrosting. • Frosting occurs when the incoming air is cool and dry, normally during
Spring or Fall, or the airflow is restricted. Frosting due to cold/dry
conditions is a normal part of operation and “DEFROSTING” will show on
the display. If it is not cool and dry, look for blocked ductwork or a dirty
filter.
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.
• Verify all ductwork is properly sealed. Dehumidification will restart by
itself when the incoming air temperature is within range and the dew
point is above 40°F. E8 appears on the display when inlet air conditions
prevent operation.
When zoned,
the dehumidifier
damper does
not open in
INSTALLER TEST
mode.
Incorrect
damper wiring or
bad connection.
• Verify wiring between dampers and 24 VAC transformer.
• If wired for Two Zone operation, verify that 24 VAC transformer is 40 VA
minimum.
• Check all wiring connections between dampers and control board.
• Verify the normally closed dampers are in the Primary Zone ductwork
and the normally open dampers are in the Secondary Zone ductwork.