VD300 Series Inverter User Manual
Fault Shooting and Solutions
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8.2 Common Faults and Solutions
8.2.1 No Display after Power on
Use multi-meter to check inverter input power to see if it is in accordance with inverter rated voltage. If
power voltage factor is eliminated, then check 3phase rectifier bridge is okay. If rectifier bridge has
exploded, please ask for help.
Check the CHARGE light on. If the light is off, the fault is mainly in the rectify bridge or the buffer
resistor. If the light is on, the fault may be lies in the switchover power supply. Please ask for support.
8.2.2 Power Supply Air Switchover Trips off when Power on
Inspect whether the input power supply is grounded or short circuit. Please solve the problem. Inspect
whether the rectify bridge has been burnt or not. If it is damaged, ask for support.
8.2.3 Motor doesn’t Move after Inverter Run
Inspect if there is balanced three-phase output among U, V, W. If yes, then motor could be damaged,
or mechanically locked. Please solve it. If the output is unbalanced or lost, the inverter drive board or
the output module may be damaged, ask for support..
8.2.4 Inverter Displays Normally when Power on, but Switchover at the Input Side Trips when
Run
①
Inspect whether the output side of inverter is short circuit. If yes, ask for support.
②
Inspect whether ground fault exists. If yes, solve it.
③
If trip happens occasionally and the distance between motor and inverter is too far, it is
recommended to install output AC reactor.
④
If inverter in normal protection, after eliminating error, press STOP/RESET key to reset error, then
restart inverter.
⑤
After eliminating error, inverter power supply shut down, wait until LED display light off, then
restart inverter.
⑥
If above steps cannot get inverter back to normal usage, then take note of the error code
displayed, and inverter specification, product number, then contact the manufacturer.
Summary of Contents for VD300 Series
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