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TABLE 1: Diagnostic Codes
Diagnostic
Code
Failure Mode
Low Temperature
E6
Thermistor Failure
E7
Float Switch Open
Inlet Air Temperature
Out of 50°F–104°F
E8
Range, or Dew Point
Below 40°F
Outdoor
E9
Temperature Sensor
Open or Shorted
TABLE 2: Troubleshooting Guide
Symptom
Possible Reason
Dehumidifier does
No power to unit .
not turn on/run.
Pressure
Dehumidifier
drop across
blower is running
dehumidifier is
but with little or no
higher than 0 . 6 "
airflow.
WC for Models
E130/E130H .
Action
Check the low temperature sensor connection at the power board.
Remove the side access panel and verify the sensor is not damaged and
connected to the suction line .
If the sensor is connected and secured to the refrigeration line, it may need to be
replaced with Part No. 5455 – contact Technical Support to confirm.
Empty the condensate pan .
Check the float switch connection at the user interface.
If not using a float switch, verify jumper is between float switch terminals on
dehumidifier user interface.
If the problem persists, replace the float switch.
1. Verify all ductwork is properly sealed.
2. Check for air leakage that might affect the temperature or RH of the incoming air.
3. If the air temperature is in range and the dew point is above 40°F, contact
Technical Support .
1. Check the sensor connection at the
power board .
2. Remove the wires from the
terminals and measure the
resistance . A short circuit will have
a resistance very close to 0 Ohms
and an open circuit will have a
very high resistance . Use the Ohms
chart to approximate the resistance
based on outdoor temperature .
3. If the sensor is not reading correctly,
replace the sensor, Part No . 8052 .
Troubleshooting Procedure
• Check that the dehumidifier is plugged in.
• Check that the power switch is turned ON (if equipped).
• Check that the user interface is turned ON.
• Check that the circuit breaker has not tripped.
• 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.
Outdoor
Temperature
Resistance
0°F
84,500 Ohms
20°F
46,000 Ohms
40°F
26,000 Ohms
60°F
15,500 Ohms
80°F
9,500 Ohms
100°F
6,000 Ohms
Reset
Cycle Power
Self-
Correcting
Self-
Correcting
Self-
Correcting
21
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Table of Contents
Troubleshooting
