5.5 Maintenance and Inspection Inverter doesn’t need daily inspection and maintenance. To ensure long-term reliability, follow the instructions below to perform regular inspection. Turn the power off and wait for the charge indicator (LED) to go out before inspection to avoid potential shock hazard from the charge stored in high-capacity capacitors. (1) Clean up the accumulation of any dust inside the inverter. (2) Check if there are any loose terminal screws and tighten them. (3) Insulation tests (a) Disconnect all leads connecting the INVERTER with external circuits when performing insulation tests on external circuits. (b) Internal insulation test should be performed against the main circuit of the INVERTER body only. Use a high resistance DC 500V meter with insulating resistance higher than 5Mℌ. Caution! Do not perform this test against the control circuit.
E310
Insulation Test Diagram
5-12