Delta VFD-B User Manual page 166

Fault
Fault Descriptions
Name
Over-current during
acceleration
Over-current during
deceleration
Over-current during
constant speed operation
External Fault
Emergency stop
Internal EEPROM can not be
programmed.
Internal EEPROM can not be
read.
U-phase error
V-phase error
W-phase error
OV or LV
Current sensor error
OH error
Software protection failure
Password is locked.
Auto accel/decel failure
Revision July 2008, BE16, SW V4.08 & V5.00
Chapter 6 Fault Code Information|VFD-B Series
Corrective Actions
1. Short-circuit at motor output: Check for
possible poor insulation at the output lines.
2. Torque boost too high: Decrease the torque
compensation setting in Pr.7-02.
3. Acceleration Time too short: Increase the
Acceleration Time.
4. AC motor drive output power is too small:
Replace the AC motor drive with the next
higher power model.
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.
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.
1. Input EF (N.O.) on external terminal is closed
to GND. Output U, V, W will be turned off.
2. Give RESET command after fault has been
cleared.
1. When the multi-function input terminals MI1 to
MI6 are set to emergency stop (setting 19 or
20), the AC motor drive stops output U, V, W
and the motor coasts to stop.
2. Press RESET after fault has been cleared.
Return to the factory.
Return to the factory.
Return to the factory.
Return to the factory.
Keypad will be locked. Turn the power ON after
power OFF to re-enter the correct password. See
Pr.00-07 and 00-08.
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.
6-3