TROUBLESHOOTING
Technical Support is available Monday through Friday, 7:00 a..m.. to 5:00 p..m.. CST, at (800)
LED CODES
The dehumidifier control board uses the Status LED to communicate current status or a fault code.. Faults can be either critical or non- critical.. When a critical fault is detected, the red LED will flash the fault code and all outputs will immediately turn off.. A critical fault can be cleared by repairing the fault and cycling power or turning the control knob to OFF.. When a
TABLE 7 – Green LED Codes
Activity | Status |
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Solid ON | Compressor ON |
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Blinking 1 sec.. ON & 1 sec.. OFF | Sampling |
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Blinking 1/2 sec.. ON & 1/2 sec.. OFF | Defrosting |
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Alternating Green & Red | Test Mode |
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TABLE 8 – Red LED Codes
Number
of Blinks
Fault Type
Failure Mode
Failure Condition
Action
1 | Critical | Internal RH | RH sensor | 1.. Check connection between sensor board and control board.. |
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| sensor fault.. | of 0% | 2.. If connection okay, call Technical Support.. |
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2 | Critical | Internal | Temperature sensor | 1.. Check connection between sensor board and control board.. |
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| temperature | reads out of | 2.. If connection okay, call Technical Support.. |
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| sensor fault.. |
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3 | Critical | Model 70 | Model 70 not communicating with | 1.. Check connections between Model 70 and control board.. |
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| communication | dehumidifier control board.. | 2.. If connections okay, turn off the dehumidifier and remove |
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| error.. |
| the Model 70.. Use a short section of |
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| reconnect the Model 70 to the control board.. Turn the |
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| dehumidifier back on and increase the dryness setting on |
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| the Model 70.. If the dehumidifier turns on, the problem is |
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| with the wiring installed between the dehumidifier and the |
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| Model 70.. |
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| 3.. If the above does not fix the problem, call Technical |
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| Support.. |
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4 | Critical | Insufficient | After 120 minutes of compressor operation, | 1.. Check the frost sensor connection at the control board.. |
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| capacity.. | the frost sensor temperature is not at least | 2.. Remove the side panel (when facing side of unit, on/off |
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| 10°F below the inlet air temperature.. | switch will be on left) and verify the temperature sensor is |
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| not damaged, is fully inserted in the sensor well, and the |
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| well is filled with thermal paste.. |
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| 3.. If the sensor is not damaged and positioned correctly, |
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| contact Technical Support.. |
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5 | Inlet air | Internal temperature sensor reads out | 1.. Circulate air through the unit by setting the Cycle Period to | |
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| temperature out | of 50°F | 1 hour and Cycle Time to 60 minutes.. After a minimum of |
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| of range.. | operation.. NOTE: If compressor is on when | 10 minutes, cycle power to the dehumidifier.. |
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| fault condition occurs, the compressor will | 2.. If fault persists, call Technical Support.. |
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| turn off.. If the compressor is not on when |
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| the fault condition occurs, there is no fault.. |
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6 | Critical | Frost sensor | Frost temperature sensor nonexistent, | 1.. Check the frost sensor connection at the control board.. |
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| failure.. | erratic or reads out of | 2.. Remove the side panel (when facing side of unit, on/off |
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| switch will be on left) and verify the temperature sensor is |
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| not damaged, is fully inserted in the sensor well, and the |
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| well is filled with thermal paste.. |
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| 3.. If the fault persists, contact Technical Support.. |
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7 | Float switch | Open circuit between float switch inputs.. | 1.. Empty the condensate pan.. | |
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| open.. |
| 2.. Check the float switch connection at the control board.. |
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| 3.. If not using float switch, verify jumper is between float |
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| switch terminals on dehumidifier control board.. |
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| 4.. If the problem persists, replace the float switch.. |
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