8000m Series
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6.2 Common Faults and Solutions
Inverter may have following faults or malfunctions during operation, please refer
to the following solutions.
6.2.1 No display after power on
• Inspect whether the voltage of power supply is the same as the inverter rated
voltage or not with multi-meter. If the power supply has problem, inspect and
solve it.
• Inspect whether the three-phase rectify bridge is in good condition or not. If the
rectification bridge is burst out, ask for support.
6.2.2 Power supply air switch trips off when power on
• Inspect whether the input power supply is grounded or short circuit. Solve this
problem.
• Inspect whether the rectify bridge has been burnt or not. If it is damaged, ask for
support.
6.2.3 Motor doesn’t run after inverter works
• Inspect if there is balanced three-phase output among U, V, W. If yes, then
motor could be damaged, or mechanically locked.
• If the output is unbalanced or lost, the inverter drive board or the output module
may be damaged, ask for support..
6.2.4 Inverter displays normally when power on, but switch at the input side
trips when running
• Inspect whether the output side of inverter is short circuit. If yes, ask for
support.
• Inspect whether ground fault exists. If yes, solve it.
• If trip happens occasionally and the distance between motor and inverter is too
far, it is recommended to install output AC reactor.
• Inspect whether the output module is burnt or not. If yes, ask for support.
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