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5.5 Maintenance and Inspection
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、 The maintenance project is as follows：
Ensure the temperature and humidity around the inverter are suitable, and have good
ventilation, and keep away from heat source.
Check the inside of the inverter and replace the old or damaged parts in time.
Clean up the accumulation of any dust inside the inverter.
Check grounding to ensure proper grounding.
Check if there are any loose terminal screws and tighten them.
2、 Insulation pressure test diagram
Models 401/402/403/405：
Caution! Do not perform this test against the control circuit.
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