Troubleshooting of dehumidifier

No dehumidification

1. Ventilation system failure:

①Air inlet grille and outlet grille: A. Man-made damage or aging and cracking; B. The wind in or out is severely blocked;

②Air filter: blocked or damaged by dust;

③Evaporator: A. Dust on evaporator condenser fins; B. Icing on the surface of the evaporator;

④Fan motor: A. The capacitor is damaged; B. Fan motor holding shaft; C. Rotor and shaft are loose; D. Bending of the shaft; E. Bearing damage; F. Burning of windings;

⑤Feng Ye: A. The fixing screws are loose; B. The fan blades are deformed or damaged; C. The dust on the wind leaves is serious, which seriously affects the air output; D. The fan blades of small dehumidifiers still have the phenomenon that they are stuck due to serious dust accumulation.

2. Electrical system failure:

①Neither the compressor nor the fan rotates: A. The power supply is cut off; B. The switch is not closed; C. The socket is disconnected; D. The voltage is too low; E. The circuit breaker is open; F. The fuse is blown.

②The compressor does not rotate, the fan rotates: A. Starter failure; B. Capacitor failure; C. Overload protection.

③Compressor and fan are both running: the refrigeration system is faulty.

3. Refrigeration system failure:

① All refrigerant leaks;

② The refrigeration system is blocked: A. Dirty blockage; B. Oil blocking; C. Welding blockage

③ Excess refrigerant;

④The compressor has no displacement (fault).

4. Compressor failure:

① Poor compression, blow-by in the high and low pressure chambers;

② The running parts are damaged and the compressor is holding the shaft.

The maintenance sequence of the dehumidifier noise increase failure:

1. The ground is uneven and the dehumidifier is not stable;

2. Loose parts on the dehumidifier;

3. There are foreign objects in the dehumidifier;

4. Damaged or deformed fan blades cause the dynamic balance to be destroyed;

5. Starter failure;

6. There is a collision between the pipelines;

7. The fan is short of oil;

8. Fan bearing failure;

9. The compressor noise is too loud;

10. Too much refrigerant or lubricating oil is charged, causing liquid shock.

Water to the ground

1. The dehumidifier is placed unbalanced, and the sink is excessively inclined, causing water to overflow;

2. The drain hole or drain pipe of the sink is blocked;

3. The sink is damaged and leaks;

4. Water leakage at the outlet pipe connection or aging and cracking of the outlet pipe.

Dehumidification becomes worse

1. The air filter has serious dust accumulation, and the airflow is blocked;

2. The air outlet sucks obstacles and the airflow is blocked;

3. The fan speed slows down;

4. The airtightness of the room is poor, and a large amount of outdoor humid air infiltrates;

5. The room size is too large;

6. Excessive indoor moisture;

7. There is more dust on the evaporator fins, which reduces the effect of freezing and dehumidification;

8. Frost on the surface of the evaporator;

9. There is more oil in the evaporator, which reduces the effect of refrigeration and dehumidification;

10. Insufficient refrigerant charge;

11. Refrigerant leakage;

12. The capillary has the wrong specifications, the pipe diameter is large, and the throttling and pressure reduction is not enough;

13. Ice blockage in the refrigeration system;

14. Part of the refrigeration system is plugged;

15. There is air in the refrigeration system;

16. The compressor has poor compression and reduced displacement.