Installation Manual

TROUBLESHOOTING
IO-DV090 IO-DV090
WWW.CLEANCOMFORT.COM
14
Technical Description of
Dehumidier Operation
The DV090 uses a refrigeraon system similar to an air
condioner's to remove heat and moisture from incom-
ing air, and add heat to the supply air that is discharged
from the dehumidier. Hot, high-pressure refrigerant gas
is routed from the compressor to the condenser coil (See
Figure 9). The refrigerant is cooled and condensed by
giving up its heat to the supply air being discharged from
the unit. The refrigerant liquid then passes through a
strainer and capillary tubing which causes the refrigerant
pressure and temperature to drop. It next enters the
evaporator coil where it absorbs heat from the incoming
air and evaporates. The evaporator operates in a ooded
condion, which means that all the evaporator tubes
contain liquid refrigerant during normal operaon. A
ooded evaporator should maintain nearly constant
pressure and temperature across the enre coil, from
inlet to outlet.
The mixture of gas and liquid refrigerant enters the
accumulator aer leaving the evaporator coil. The ac-
cumulator prevents any liquid refrigerant from reaching
the compressor. The compressor evacuates the cool
refrigerant gas from the accumulator and compresses
it to a high pressure and temperature to repeat
the process.
Troubleshooting
Neither fan nor compressor running.
Dehumidication is being called for. No fan call.
1. Unit unplugged or no power to outlet.
2. Humidity control set too high.
3. Loose connecon in internal or control wiring.
4. Defecve Compressor relay.
5. Defecve control transformer.
Compressor is not running. Dehumidication
is being called for. No fan call.
1. Defecve compressor run capacitor.
2. Loose connecon in compressor circuit.
3. Defecve compressor overload.
4. Defecve compressor.
5. Defrost thermostat open.
6. Defecve compressor relay
Compressor cycles on and o. Dehumidication
is being called for. No fan call.
1. Low ambient temperature and/or humidity causing
unit to cycle through defrost mode.
2. Defecve compressor overload.
3. Defecve compressor.
4. Defrost thermostat defecve.
5. Dirty air lter(s) or air ow restricted.
6. Defecve fan relay.
Fan is not running. Dehumidication or
fan is being called for.
1. Loose connecon in fan circuit.
2. Obstrucon prevents fan impeller rotaon.
3. Defecve fan.
4. Defecve fan relay.
Low dehumidication capacity (evaporator is
frosted continuously). Dehumidication is
being called for.
1. Defrost thermostat loose or defecve.
2. Low refrigerant charge.
3. Dirty air lter(s) or air ow restricted.
4. Excessively restricve ducng connected to unit.
Figure 9: Refrigeraon System of DV090 Dehumidier