3
Maintenance and inspection
1. The keyboard, control circuit board and driver circuit board are equipped with CMOS integrated circuits.
Please pay special attention when using.
If you touch the circuit board directly with your fingers, static induction may damage the integrated chip on the
circuit board.
2. Do not change the wiring or remove the terminal wiring during power on. Do not check the signal during
operation. It will damage the equipment.
1. Do not touch the terminal of the inverter, there is high voltage on the terminal.
Danger of electric shock.
2. Before power on, be sure to install the terminal cover. When removing the cover, be sure to disconnect the
power supply.
Danger of electric shock.
3. Non professional technicians are not allowed to carry out maintenance and inspection.
Danger of electric shock.