SAJ PDM20 series, User Manual

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PDM20 Series
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5.2 Common Faults and Actions
The following faults may happen in use. For brief fault analysis, please refer to the
following methods.
5.2.1 No display at power on
(1) Check whether the input power is consistent with the nominal voltage of the
drive with multimeter.
(2) Check whether the three-phase rectifier bridge is intact. If the rectifier bridge is
broken down, please request service.
5.2.2 The power air switch trips off at power on.
(1) Check whether there is short circuit or ground connection between input power.
If yes, please eliminate it.
(2) Check whether the rectifier bridge has been broken down. If yes, please request
service.
5.2.3 The motor doesn’t rotate after the SPD runs.
(1) Check whether there is balanced three-phase output among U, V,W. If yes,
check whether the motor is broken or blocked. If no, please confirm whether the
motor parameters are set correctly.
(2) If there is output but the three-phase power is not balanced, please request
service.
(3) If there is no output voltage, please request service.
5.2.4 SPD shows normally at power on but the power air switch trips off after
running.
(1) Check whether short circuit occurs between output modules interval. If yes,
please request service.