... into AC 110/220V or 24V outside battery.4. Turn on the ON / OFF switch, if the indicator light get bright and the voltage ... is in good condition. Please move the switch to “test” position.5. Please turn on the “A” district button, if all the ... , B1 and C1 together, please turn on the A, B, and C button and turn off others. If you press button “1 ...