The general troubleshooting of dehumidifiers can refer to the following sequence:
（1） Maintenance sequence for non dehumidification faults of dehumidifiers:
1. Dehumidifier ventilation system malfunction:
<1> Air inlet and outlet grilles: A. Artificial damage or aging and cracking; B. Severe obstruction of air inlet or outlet;
<2> Air filter screen: blocked or damaged by dust;
<3> Evaporator: A. Dust accumulation on the fins of the evaporator condenser; B. Ice on the surface of the evaporator;
<4> Fan motor: A. Capacitor damaged; B. Fan motor clamp shaft; C. Loose rotor and shaft; D. Shaft bending deformation; E. Bearing damage (oil bearing, lubricating oil volatilization; ball bearing, ball wear); F. The winding is burnt out;
<5> Blade: A. Loose fixing screws; B. Fan blades deformed or damaged; C. Severe dust accumulation on the wind blades seriously affects the air output; D. There is also a phenomenon of the small dehumidifier fan blades getting stuck due to severe dust accumulation.
2. Electrical system malfunction:
<1> The compressor and fan do not rotate: A. The power supply is cut off; B. The switch is not closed; C. Socket disconnection; D. Low voltage; E. The circuit breaker is disconnected; F. The safety tube is burnt out; J. Three minute compressor protection.
<2> Compressor not running, fan running: A. Relay failure; B. Capacitor failure; C. Overload protection.
<3> Compressor and fan both running: refrigeration system malfunction.
3. Refrigeration system malfunction:
<1> Full refrigerant leakage;
<2> Cooling system blockage: A. Dirty blockage; B. Oil blockage; C. Welding plug;
<3> Excessive refrigerant;
<4> The compressor has no displacement (malfunction).
4. Compressor failure:
<1> Poor compression, high and low pressure chamber blowby< 2> Damaged running parts, compressor holding shaft.
（2） Maintenance sequence for increased noise in dehumidifiers:
1. The ground is uneven and the dehumidifier is placed unevenly;
2. Loose parts on the dehumidifier;
3. There are foreign objects inside the dehumidifier;
4. The fan blades are damaged or deformed, causing the dynamic balance to be disrupted;
5. Starter failure;
6. There is a collision between pipelines (copper pipes);
7. The fan is out of oil;
8. Fan bearing failure (oil bearing, lubricating oil volatilization; ball bearing, ball wear);
9. Excessive compressor noise;
10. Excessive refrigerant or lubricating oil filling can cause liquid hammer.
（3） The maintenance sequence of the dehumidifier flowing water to the ground fault:
1. The placement of the dehumidifier is unbalanced, and the sink is excessively tilted, resulting in water overflow;
2. The drainage hole or pipe of the water tank is blocked;
3. The sink is damaged and leaking;
4. Leakage or aging or rupture of the outlet pipe connection.