This document applies the following issues:
1. When the trigger is not pulled, the trigger signal is always on
2. When the safety lock does not touch the workpiece, the safety lock is always on
3. When there is no above action, it will automatically shine
Cause analysis and treatment
By unplugging the signal pin of signal interface one, if there is [Safety lock signal] and [Trigger button signal] when one or both are on, directly replace the main control board
If it is unplugged and does not light up, it means that the line is short-circuited, and the corresponding on-off can be measured through the multimeter, and the specific circuit logic can refer to the safety lock and trigger button
Since the main function of the device is that the protection voltage is too large, causing the internal device of the motherboard to burn, and the voltage here is normal, it will not exceed the power supply voltage. Therefore, it is likely that the customer's site environment causes strong static electricity or instantaneous high voltage to break it down.
Recommendations and improvement measures:
1 It is recommended that the customer keep the welding platform well grounded and the machine shell well grounded. If necessary, separate piles are driven
2 The welding torch is placed in the designated position when not in use, do not place it arbitrarily.
3 Wearing electrostatic protective equipment has a certain protective effect on personnel and machines.