Delta Electronics AC Drive VFD-F Series - Manual (Page 27)

English-27
Fault
Name
Fault Descriptions Corrective Actions
Overheating
Heat sink
temperature too
high
1. Ensure that the ambient temperature falls within the specified
temperature range.
2. Make sure that the ventilation holes are not obstructed.
3. Remove any foreign objects from the heatsinks and check for
possible dirty heat sink fins.
4. Check the fan and clean it.
5. Provide enough spacing for adequate ventilation.
Low voltage
The AC motor drive
detects that the DC
bus voltage has
fallen below its
minimum value.
1. Check whether the input voltage falls within the AC motor
drive rated input voltage range.
2. Check whether the motor has sudden load.
3. Check for correct wiring of input power to R-S-T (for 3-phase
models) without phase loss.
Overload
The AC motor drive
detects excessive
drive output current.
1. Check whether the motor is overloaded.
2. Reduce torque compensation setting in Pr.7-02.
3. Take the next higher power AC motor drive model.
NOTE: The AC motor drive can withstand up to 150% of the
rated current for a maximum of 60 seconds.
Overload 1
Internal electronic
overload trip
1. Check for possible motor overload.
2. Check electronic thermal overload setting.
3. Use a higher power motor.
4. Reduce the current level so that the drive output current does
not exceed the value set by the Motor Rated Current Pr.7-00.
Overload 2
Motor overload.
1. Reduce the motor load.
2. Adjust the over-torque detection setting to an appropriate
setting. (Pr. 06-03 to Pr. 06-05)
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.
Communication
error
1. Check the connection between the AC drive and computer
for loose wires.
2. Check if the communication protocol is properly set.
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.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.
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.