Delta Electronics AC Motor Drive VFD-EL User Manual page 165

Chapter 6 Fault Code Information and Maintenance|
Fault
Fault Descriptions
Name
Ground fault
Auto accel/decel failure
Communication Error
Software protection failure
Analog signal error
PID feedback signal error
Phase Loss
6-4
Corrective Actions
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 whether the IGBT power module is
damaged.
2. Check for possible poor insulation at the
output line.
1. Check if the motor is suitable for operation by
AC motor drive.
2. Check if the regenerative energy is too large.
3. Load may have changed suddenly.
1. Check the RS485 connection between the AC
motor drive and RS485 master for loose wires
and wiring to correct pins.
2. Check if the communication protocol, address,
transmission speed, etc. are properly set.
3. Use the correct checksum calculation.
4. Please refer to group 9 in the chapter 5 for
detail information.
Return to the factory.
Check the wiring of ACI
1. Check parameter settings (Pr.10.01) and
AVI/ACI wiring.
2. Check for possible fault between system
response time and the PID feedback signal
detection time (Pr.10.08)
Check input phase wiring for loose contacts.
Revision August 2008, 2ELE, V1.02