TROUBLESHOOTING GUIDE
SYMPTOM |
| TROUBLESHOOTING PROCEDURE / POSSIBLE REASON |
Dehumidifier is producing |
| • Reheat of outgoing air will cause a temperature increase across the dehumidifier. |
hot air. |
| • Unit will possibly run continuously initially. After unit has “dried” home, |
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| dehumidifier will cycle, reducing load. |
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Dehumidifier Blower is running, |
| • Normally Open Damper was used instead of Normally Closed Damper in backflow. |
but no airflow. |
| • Total HVAC system static is higher than 0.8” w.c. |
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Dehumidifier not adequately |
| • Unit will need time to “dry” materials in home before effectively changing RH. |
dehumidifying. |
| • Too little airflow through dehumidifier. |
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| • Total HVAC system static is higher than 0.8” w.c. |
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| • Compressor is not turning on. |
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| • System undercharged. |
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Dehumidifier is not |
| • Check condensate trap to be sure it is clear. |
draining properly. |
| • Check drain line for continuous slope. |
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HVAC fan does not turn |
| • Make sure there is power to the HVAC equipment. |
on when cycle time dial is |
| • Check the wiring diagram for the R, C, W, Y, GH, and GS at the HVAC equipment, |
in “TEST” mode. |
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| thermostat, and the dehumidifier. | |
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| • Make sure the sensor is connected to the Outdoor Temperature Sensor terminals |
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| or the System Setup block is set to “TIMED” mode. |
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| • Check the voltage across the R and C terminals at the dehumidifier. Voltage |
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| should be 18 VAC minimum - 30 VAC maximum. |
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| • In “TEST” Mode, the HVAC fan will activate for 1 minute, DO NOT LEAVE IN TEST |
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| MODE AS DEHUMIDIFIER WILL NOT OPERATE. |
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The dehumidifier damper does |
| • Follow all of the system checkout procedures. |
not open in “TEST” Mode. |
| • Check the wiring diagram for the damper and 24 VAC transformers. |
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Fan cycling operates |
| • If the HVAC equipment is making a Heat or Cool call, or the fan is in Continuous |
continuously after the dial |
| Operation, fan cycling will remain on until the requirement set by the cycle |
is taken off “TEST” mode. |
| period dip switch and knob is met. |
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| • If the interval is set at 1 HOUR and the cycle time is set at 60 minutes, fan |
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| cycling will be on continuously. Change the setting to a lower amount if this is |
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| not desired. |
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