Why is there no display on the display of the high tembiricha muffle choto?

1. Check whether the power supply interface of the thermostat on the muffle furnace is off or loose.

2. Observe whether the power indicator light inside the temperature controller is lit, if it is lit, check whether the display cable is faulty; if the internal indicator light is off (the interior is dark), troubleshoot it according to the following method.

3. Check whether the connector inside the controller is off or loose.

4. Check whether the power supply circuit of the controller is broken (instrument test).

5. Check whether the switching power supply has a DC 5V output. Disconnect the serial port cable on the back of the controller, turn on the power switch, and use a meter to test whether the switching power supply has a DC 5V output, or visually check whether the indicator light next to the switching power supply is on. Make sure that the output voltage of the switching power supply is normal.

6. Check whether there is a short circuit inside the controller. Disconnect the serial port cable on the back of the controller, use a meter to test whether there is a short circuit between the 6 pins and 9 pins of the serial port. Make sure that there is no internal short circuit (that is, there is no short circuit between the 6 pins and 9 pins of the serial port on the back of the controller. Short-circuit phenomenon).

7.Comprehensive circuit failure, remove or replace with the manufacturer.