1. There is no display when starting up, and the reason is that there is no AC 220V. The solution is to check the power cord and fuse.
2. The display is abnormal, mainly due to a malfunction of the motherboard or monitor. The solution is to check the computer motherboard or replace the monitor.
3. The fuse is blown during charging, mainly due to a current source fault. The solution is to replace the constant current switch power supply.
4. Fault 1 is displayed, mainly due to hardware circuit failure. The solution is to check the computer motherboard.
5. Fault 2 is displayed, mainly due to a blocked current circuit or a faulty current source. The solution is to check the wiring.
6. Fault three is displayed, mainly due to the charging current not meeting the requirements, and the treatment method is excessive contact resistance.
7. Fault four is displayed, mainly due to the tested product exceeding the measurement range.
