TROUBLESHOOTING
Technical Support is available Monday through Friday, 7:00 a..m.. to 5:00 p..m.. CST, at (800)
DIAGNOSTIC CODES
When an error occurs, the Diagnostic Code along with SERVICE REQUIRED will be displayed on the control screen..
TABLE 4 – Diagnostic Codes
Diagnostic
Code
Failure Mode
Action
Reset
E1 | Internal Humidity or | 1. | Check the connection between the sensor board and control board.. | Cycle Power |
| Temperature Sensor | 2. | If connection okay, replace sensor board, Part No.. 5460.. |
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| Open or Shorted |
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E2 | High Refrigeration | 1. | Verify that the fan works, the backflow damper swings freely and there is no blocked or restricted | Cycle Power |
| Pressure |
| ductwork.. |
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| 2. | If the fault persists, call Technical Support.. |
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E3 | Model 76 | 1. | Check connections between Model 76 and dehumidifier control board.. Terminals should be fully | |
| Remote Control |
| inserted and secured in the control board and Model 76 control terminals.. |
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| Communication Loss | 2. | If connections are correct and secure, turn off the dehumidifier and remove the Model 76.. Use a |
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| short section of |
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| back on and increase the dryness level setting on the Model 76.. If the dehumidifier turns on, the |
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| problem is with the wiring between the dehumidifier and control.. |
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| 3. | If the dehumidifier does not turn on, call Technical Support.. |
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E4 | Insufficient Capacity | 1. | Check the frost sensor connection at the power board.. Terminal should be fully seated on the | Cycle Power |
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| power board pins.. |
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| 2. | Remove the side access panel and verify that the sensor is secured to the suction line.. |
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| 3. | If the sensor is connected and secured to the refrigeration line proceed to the next step.. |
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| 4. | Reset the fault by cycling power to the dehumidifier.. |
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| 5. | Turn the humidity setting down (below room/home humidity level) to make a dehumidification call.. |
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| 6. | Allow the fan and compressor to run for approximately |
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| test mode by simultaneously pressing the UP ARROW and MODE buttons for 3 seconds.. The LCD |
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| will display the temperature measured by the internal sensor while also displaying AIR SAMPLING |
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| and ON, the humidity measured by the internal sensor while also displaying %RH and ON, and the |
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| frost sensor temperature while also displaying ON.. Scroll through these values and by using the |
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| UP/DOWN arrow buttons.. |
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| 7. | Record values and call Technical Support.. |
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E5 | High Temperature | 1. | Check the high temperature sensor connection at the power board.. Terminal should be fully seated | Cycle Power |
| Thermistor Failure |
| on the power board pins.. |
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| 2. | Remove the side access panel and verify the sensor is not damaged and connected to the |
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| refrigeration line coming from the compressor.. |
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| 3. | If the sensor is connected and secured to the refrigeration line, it may need to be replaced with |
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| Part No.. 5456 – contact Technical Support to confirm.. |
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E6 | Low Temperature | 1. | Check the low temperature sensor connection at the power board.. | Cycle Power |
| Thermistor Failure | 2. | Remove the side access panel and verify the sensor is not damaged and connected to the suction |
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| line.. |
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| 3. | If the sensor is connected and secured to the refrigeration line, it may need to be replaced with |
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| Part No.. 5455 – contact Technical Support to confirm.. |
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