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TROUBLESHOOTING (CONTINUED)
TABLE 4 – 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
or dew point below
40°F
1. Verify all ductwork is properly sealed.
2. If no signs of leak points, contact Technical Support.
Self-Correcting
E9 Outdoor Temperature
Sensor Open or
Shorted
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 very high resistance. The table at right can
be used to approximate the resistance based on
outdoor temperature.
3. If the sensor is not reading correctly, replace the
sensor, Part No. 8052.
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
Self-Correcting
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