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8000B Series

6.2 Common Faults and Solutions

Inverter may have following faults or malfunctions during operation, please

refer to the following solutions.

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 rectication bridge is burst out, ask for support.

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.

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..

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.

SAJ 8000B series User Manual

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