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Chapter 6 Fault Code Information and Maintenance|
6-2 Revision August 2008, 03VE, SW V2.04
Fault Name Fault Descriptions Corrective Actions
Ground fault
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 protection of the user.
1. Check the wiring connections between the
AC motor drive and motor for possible
short circuits, also to ground.
2. Check whether the IGBT power module is
damaged.
3. Check for possible poor insulation at the
output line.
Short-circuit is
detected between
upper bridge and
lower bridge of the
IGBT module
Return to the factory
DC BUS over-voltage
during acceleration
(230V: DC 450V;
460V: DC 900V)
DC BUS over-voltage
during deceleration
(230V: DC 450V;
460V: DC 900V)
DC BUS over-voltage
in constant speed
(230V: DC 450V;
460V: DC 900V)
1. Check if the input voltage falls within the
rated AC motor drive input voltage range.
2. Check for possible voltage transients.
3. If DC BUS over-voltage due to
regenerative voltage, please increase the
Deceleration Time or add an optional
brake resistor.
Hardware failure in
voltage detection
Check if input voltage is within specification
range and monitor if there is surge voltage.
DC BUS voltage is
less than Pr.06-00
during acceleration
DC BUS voltage is
less than Pr.06-00
during deceleration
DC BUS voltage is
less than Pr.06-00 in
constant speed
DC BUS voltage is
less than Pr.06-00 at
stop
1. Check if the input voltage is normal
2. Check for possible sudden load
Phase Loss
Check Power Source Input if all 3 input phases
are connected without loose contacts.
For models 40hp and above, please check if
the fuse for the AC input circuit is blown.