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HIGH DEW POINT / HIGH HUMIDITY ALERT
If the dehumidifier measures the dew point of the air to be 4°F or more or 6%RH or more above the setting for 72 consecutive hours, the ALERT
LIGHT will turn on and the display will show "HI" . The dehumidifier will continue to operate as normal when the ALERT LIGHT is on . If the dew
point falls within 4°F of the setting or relative humidity falls within 6%RH of the setting, the ALERT LIGHT will turn off .
The dehumidifier measures the conditions of the incoming air every five (5) minutes even if the dehumidifier is turned off (using the ON/OFF button)
to determine if there is a high dew or humidity condition . Should the dehumidifier be turned off, the alert setting defaults to 57°F or 60%RH .
TROUBLESHOOTING
Technical Support is available Monday through Friday, 7:00 a .m . to 5:00 p .m . CST, at (800) 334-6011 . Use the guides on the following pages to
identify and correct system faults . Contact Technical Support before replacing the unit or any components and for additional troubleshooting .
DIAGNOSTIC CODES
When an error occurs, the Diagnostic Code along with SERVICE REQUIRED will be
displayed on the control screen . The ALERT LIGHT will turn on when an error occurs .
TABLE 2 – Diagnostic Codes
Diagnostic
Code
Failure Mode
E1
Internal Humidity or
Temperature Sensor
Open or Shorted
E2
High Refrigeration
Pressure
E3
Model 76
Remote Control
Communication Loss
E4
Insufficient Capacity
E5
High Temperature
Thermistor Failure
10
Action
1 . Cycle power to clear error code .
2 . If error code reoccurs replace User Interface, Part No . 5475 .
1 . Verify that the fan works, the backflow damper swings freely and there is no blocked or
restricted ductwork .
2 . If the fault persists, call Technical Support .
1 . Check connections between Model 76 and dehumidifier control board . Terminals should be fully
inserted and secured in the control board and Model 76 control terminals .
2 . If connections are correct and secure, turn off the dehumidifier and remove the Model 76 .
Use a short section of 4-wire cable to reconnect the Model 76 to the control board . Turn the
dehumidifier back on and increase the dryness level setting on the Model 76 . If the dehumidifier
turns on, the problem is with the wiring between the dehumidifier and control .
3 . If the dehumidifier does not turn on, call Technical Support .
1 . Check the frost sensor connection at the power board . Terminal should be fully seated on the
power board pins .
2 . Remove the side access panel and verify that the sensor is secured to the suction line .
3 . If the sensor is connected and secured to the refrigeration line proceed to the next step .
4 . Reset the fault by cycling power to the dehumidifier .
5 . Turn the humidity setting down (below room/home humidity level) to make a dehumidification call .
6 . Allow the fan and compressor to run for approximately 10-15 minutes and then enter diagnostic
test mode by simultaneously pressing the UP ARROW and MODE buttons for 3 seconds . The
LCD will display the temperature measured by the internal sensor while also displaying AIR
SAMPLING and ON, the humidity measured by the internal sensor while also displaying %RH
and ON, and the frost sensor temperature while also displaying ON . Scroll through these values
and by using the UP/DOWN arrow buttons .
7 . Record values and call Technical Support .
1 . Check the high temperature sensor connection at the power board . Terminal should be fully
seated on the power board pins .
2 . Remove the side access panel and verify the sensor is not damaged and connected to the
refrigeration line coming from the compressor .
3 . If the sensor is connected and secured to the refrigeration line, contact Technical Support .
90-1854
Reset
Cycle Power
Cycle Power
Self-Correcting
Cycle Power
Cycle Power
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