Power supply issue
Reason: The power supply is not connected, the positive and negative poles are reversed, the working voltage is too low (<12V DC) or too high (>24V DC), which damages the instrument.
solve:
Check if the power line is connected and ensure that the wiring is correct (positive and negative poles are not reversed).
Use a multimeter to measure the supply voltage and ensure it is within the range of 12-24V DC.
Check if the power adapter or power module is working properly.
Wiring error or poor contact
Reason: Loose or detached connections of signal and power lines, or corrosion of internal circuits.
solve:
Recheck and tighten all wiring terminals.
Check if the circuit is damaged or corroded, and replace the cables if necessary.
Water ingress or internal damage to the instrument
Reason: Poor sealing may cause rainwater or condensation to enter, or damage to the components of the instrument itself.
solve:
Check if the sealing ring of the instrument housing is intact and ensure waterproofing during installation.
If water has entered or internal damage is suspected, it needs to be returned to the factory for repair.