High-low temperature damp heat test box common breakdown and maintenance method

The following Shanghai Qianshi Technology will introduce you to the common faults and maintenance of the high and low temperature heat and humidity alternating test box:
Frequent failures of the high-low temperature heat and humidity alternating test box:
1. Slow heating or no warming:
Check whether the heating system is faulty: if the heating pipe is damaged, if the heating pipe is loose, if the control instrument is burned out, the circuit is
No circuit breakers, etc.
2. No humidity:
Look first for water shortages, see if the humidifier is normal, and finally check the electronic control section.
3. Only high temperature, no low temperature:
The compressor is working properly. It may be the lack of refrigerant in the compressor, or it may be blocked by the radiator, resulting in poor heat dissipation.
The pipeline may be blocked or leaked, as long as there is a one-to-one investigation.
4. The temperature and humidity in the box are not uniform:
It may be a problem with the stirring fan. First check the fan's operation. If there is noise, the motor is burned, the bearing is
Compressor leakage:
A short circuit between the compressor motor winding and the case causes leakage of the cabinet. The compressor is leaking and the box voltage is high, close to the supply voltage.
Thermostat leakage:
Because most thermostats of the high-low temperature heat and humidity alternating test box are installed on the inner wall, temperature changes inside the box will expose the thermostat. When condensate flows into the thermostat,
The resistance value between the thermostat contact and the cabinet decreases, resulting in leakage.
No shortage of oil, etc.:
The faults corresponding to the faults of the high-low temperature heat and humidity alternating test box are eliminated as above, and if customers have problems, they can be eliminated one by one.
Some components in the cabinet are damaged or the conductors are aged and damaged.
Maintenance method:
1, check the user power connector, whether the ground is normal, there is no short circuit ground wire;
2. Check whether the refrigeration of the high-low temperature heat-heat alternating test box is normal after power-on, and whether the person touches the box has obvious hemp feel;
3, first check the insulation of the compressor, use a megohmmeter to check whether the resistance to ground ≥ 20M
4. Check the insulation of suspect component thermostats, lamps and external circuits;

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