Delta VFD-BW Series, User Manual

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Chapter 6 Fault Code Information
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VFD-BW Series
Revision May 2009, BWE0, SW V1.05 6-3
Fault
Name
Fault Descriptions Corrective Actions
Over-current during
deceleration
1. Short-circuit at motor output: Check for
possible poor insulation at the output line.
2. Deceleration Time too short: Increase the
Deceleration Time.
3. AC motor drive output power is too small:
Replace the AC motor drive with the next
higher power model.
Over-current during
constant speed operation
1. Short-circuit at motor output: Check for
possible poor insulation at the output line.
2. Sudden increase in motor loading: Check for
possible motor stall.
3. AC motor drive output power is too small:
Replace the AC motor drive with the next
higher power model.
External Fault
1. Input EF (N.O.) on external terminal is closed
to GND. U, V, W output will be turned off.
2. Give RESET command after fault has been
cleared.
Emergency stop
1. When the multi-function input terminals MI1 to
MI6 are set to emergency stop (setting 19 or
20), the AC motor drive stops U, V, W output
and the motor coasts to stop.
2. Press RESET after fault has been cleared.
Internal EEPROM can not be
programmed.
Return to the factory.
Internal EEPROM can not be
read.
Use RESET command to reset the drive to factory
setting, if it is still abnormal, it should be sent back
to the manufacturer.
U-phase error
V-phase error
W-phase error
OV or LV
Current sensor error
OH error
Return to the factory.
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.