Delta VFD11AMS21AFSHA, User Manual

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Chapter 14 Error Codes

MS300
(High Speed Model)
14-2
ID No.
Display Descriptions
4
When (one of) the output terminal(s) is grounded, short circuit current is more
than 50 % of AC motor drive rated current, the AC motor drive power module
may be damaged.
NOTE: The short circuit protection is provided for AC motor drive protection,
not for protecting the user.
Corrective Actions
 Check the wiring connections between the AC motor drive and motor for
possible short circuits, also to ground.
 Check whether the IGBT power module is damaged.
 Check for possible poor insulation at the output.
6
Over-current during stop. Hardware failure in current detection.
Corrective Actions
 Return to the factory.
7
DC-BUS over-voltage at constant speed (230V: 450 VDC; 460 V: 900 VDC)
Corrective Actions

Check if the input voltage spike without the rated AC motor drive input
voltage range.
 Check for possible voltage transients.
 If DC-BUS over-voltage due to regenerative voltage, please increase the
acceleration time or add an optional brake resistor.
8
DC-BUS over-voltage during deceleration (230V: 450 VDC; 460V: 900 VDC)
Corrective Actions
 Check if the input voltage spike without the rated AC motor drive input
voltage range.
 Check for possible voltage transients.
 If DC-BUS is over-voltage due to regenerative voltage, please increase
the deceleration time or add an optional brake resistor.
9
DC-BUS over-voltage at constant speed (230V: 450 VDC; 460V: 900 VDC)
Corrective Actions
 Check if the input voltage spike without the rated AC motor drive input
voltage range.
 Check for possible voltage transients.

If DC-BUS is over-voltage due to regenerative voltage, please increase
the deceleration time or add an optional brake resistor.
10
DC-BUS over-voltage at stop. Hardware failure in voltage detection.
Corrective Actions
 Check if the input voltage spike without the rated AC motor drive input
voltage range.
 Check for possible voltage transients.