CLEAN COMFORT DV090, Инструкция по установке и эксплуатации

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TROUBLESHOOTING
IO-DV090 IO-DV090
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Technical Description of
Dehumidifier Operation
The DV090 uses a refrigeration system similar to an air
conditioner's to remove heat and moisture from incom-
ing air, and add heat to the supply air that is discharged
from the dehumidifier. 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 flooded
condition, which means that all the evaporator tubes
contain liquid refrigerant during normal operation. A
flooded evaporator should maintain nearly constant
pressure and temperature across the entire coil, from
inlet to outlet.
The mixture of gas and liquid refrigerant enters the
accumulator after 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.
Dehumidification is being called for. No fan call.
1. Unit unplugged or no power to outlet.
2. Humidity control set too high.
3. Loose connection in internal or control wiring.
4. Defective Compressor relay.
5. Defective control transformer.
Compressor is not running. Dehumidification
is being called for. No fan call.
1. Defective compressor run capacitor.
2. Loose connection in compressor circuit.
3. Defective compressor overload.
4. Defective compressor.
5. Defrost thermostat open.
6. Defective compressor relay
Compressor cycles on and off. Dehumidification
is being called for. No fan call.
1. Low ambient temperature and/or humidity causing
unit to cycle through defrost mode.
2. Defective compressor overload.
3. Defective compressor.
4. Defrost thermostat defective.
5. Dirty air filter(s) or air flow restricted.
6. Defective fan relay.
Fan is not running. Dehumidification or
fan is being called for.
1. Loose connection in fan circuit.
2. Obstruction prevents fan impeller rotation.
3. Defective fan.
4. Defective fan relay.
Low dehumidification capacity (evaporator is
frosted continuously). Dehumidification is
being called for.
1. Defrost thermostat loose or defective.
2. Low refrigerant charge.
3. Dirty air filter(s) or air flow restricted.
4. Excessively restrictive ducting connected to unit.
Figure 9
:
Refrigeration System of DV090 Dehumidifier