First, the temperature does not appear
1. Fault with the temperature sensor
If the temperature probe of the temperature sensor breaks or the wire is broken, the sensor does not have a digital display when the temperature sensor is connected, but only shows the "----" and sounds an alarm, of course, the same situation will occur if the sensor cable is connected incorrectly.
2. The function of the thermostat is faulty
If the thermostat still can't show the temperature, then it is very likely that there is a problem with the internal temperature sensing module or conversion module, and the temperature can not be adjusted if it cannot be displayed, and the thermostat can be judged to be broken.
2. Cannot be set
1. The appearance of the button is out of order
The thermostat can not be set, it is very likely that the appearance of the button failure, the key failure has two states, the first key can not complete the function of on-off, the second can clearly see the appearance of the key is damaged, if it is the first situation, it is necessary to use the multimeter on-off file to measure, to see if the function can be on-off.
2. The internal components are damaged
If the external button is good, and the function of measuring the button on and off in the future can also be completed, it is impossible to set the temperature, which is likely to be a problem with the internal electronic components, and can be measured with a multimeter.
3. Inability to manipulate
1. The time when the thermostat cannot be controlled is set below or above the normal temperature, the thermostat can not control the intelligent equipment or heating side, and the multimeter can be used to measure the output end, and when the OUT light on the surface of the thermostat is always on, the multimeter is used to measure the output voltage.
2. If the output of the thermostat is 220V, when the multimeter measures the output of no voltage, it can be judged that the thermostat is damaged, and the thermostat may output DC voltage.
summary
The first idea to judge the damage of the thermostat is to observe whether several functions can be completed, if a certain function can not be completed, first check the hardware part of the hardware is not a problem, that is, the electronic circuit is abnormal.
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