Delta VFD-M-D series

Chapter 6 Fault Code Information|VFD-M-D Series
Revision Jan. 2007, MDE2, SW V1.05 6-3
Fault
Name
Fault Descriptions Corrective Actions
Over-current during
acceleration
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.2-01.
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.
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. Output U, V, W will be turned off.
2. Give RESET command after fault has been
cleared.
Internal EEPROM can not be
programmed.
Return to the factory.
Internal EEPROM can not be
read.
Return to the factory.
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 whether the IGBT power module is
damaged.
2. Check for possible poor insulation at the output
line.