Because the constant temperature and humidity machine is a high-precision instrument, once the fault occurs, the user often cannot solve it by himself. Here is a brief description of the maintenance problems of the common fault of the constant temperature and humidity machine:
I. Temperature and humidity controller shows abnormal temperature
Checking steps:
1. Check if the over-temperature protector of the control panel is set at 150 °C;
2. Check if the circulation motor of the equipment room is damaged or not.
3. Check if the temperature of the solid state relay burns out the short circuit: if the heater is not burned, use the three-meter electric meter AC voltage file, the voltage gear position is opened to 600 volts, and the red and black rods are respectively placed on the line number labeled T. The solid state relay is connected to both sides of the AC, and the temperature setting value of the temperature part is set to 0 ° C. At this time, the indicator of the solid state relay of the temperature part does not light up, and if the measured voltage value does not change, it is maintained at 10V. The following represents a short circuit in the state of solid state relay burnout.
solve:
1. If not, please turn the panel over-temperature protector to the position of 150 °C, or use the temperature plus 30 °C position;
2, the manufacturer's customer service department should be notified to replace the cycle motor;
3. Replace the solid state relay of the temperature part (the solid state relay marked with T as the line number)
2. Temperature and humidity controller shows abnormal humidity
Inspection steps: 1. Check if the under-water over-temperature protector in the control room is set at 150 °C;
2. Check whether the pipeline is too dirty in the machine room, causing the water flow to be unsatisfactory;
3. Check if there is water in the water tank. If it is not water, check whether the water tank has water.
4. Check if the solid state relay in the humidity part is burnt. Short circuit: If the heater is not burnt, use the three-meter electric meter AC voltage file and set the humidity part humidity setting value to 0%. At this time, the humidity part of the solid state relay The indicator light will not light up, or set the humidity part setting to 0% first, and then see if the water in the humidification tank in the machine room is boiling.
Solution: 1. If not, immediately transfer the under-water over-temperature protector to the position of 150 °C;
2. Turn off the main power supply at the rear of the machine, then open the drain valve under the humidifying bucket to the position parallel to the pipeline. When the water in the water tank is drained, use the wrench to open the humidifying bucket and open the interior. Remove the scale from the humidity for a long time, then remove the silicone tube and wash it in the water. After the maintenance is completed, follow the removal method and put it back in the opposite direction. After the device is finished, the drain valve below the humidification tank should be closed to the pipeline. Vertical position, then turn on the main power supply behind the machine;
3, the upper and lower water tanks are all water, please add water to the water tank, you can solve. If there is no water in the water tank and there is water in the water tank, the water pump in the water tank will be broken.
4. Replace the solid state relay of the humidity part (the solid state relay marked with H as the line number)
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