Fault Code Information - Delta VFD-EL-W Series User Manual

Chapter 6 Fault Code Information and Maintenance

6.1 Fault Code Information

The following messages display when the operation command source is set as digital keypad.
Fault Name
Over-current
Abnormal increase in current.
Over-voltage
The DC bus voltage exceeds its
maximum allowable value.
Overheating
Heat sink temperature is too high.
Low voltage
The AC motor drive detects that
the DC bus voltage has fallen
below its minimum value.
Overload
The AC motor drive detects
excessive drive output current.
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
Overload 2
Motor overload.
CC (current clamp)
OV hardware fault
OC hardware fault
6-2
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VFD-EL-W
Fault Descriptions Corrective Actions
1. Check if the motor power corresponds with the AC
motor drive output power.
2. Check the wiring connections to U/T1, V/T2, and
W/T3 for possible short circuits.
3. Check the wiring connections between the AC motor
drive and motor for possible short circuits, and for
short to ground.
4. Check for loose contacts between the AC motor drive
and the motor.
5. Increase the Acceleration Time.
6. Check for possible excessive loading on the motor.
1. Check if the input voltage is in the rated AC motor
drive input voltage range.
2. Check for possible voltage transients.
3. DC bus over-voltage may also be caused by motor
regeneration. Either increase the Deceleration Time
or add an optional brake resistor (and brake unit).
1. Ensure that the ambient temperature is in the
specified temperature range.
2. Make sure that the ventilation holes are not
obstructed.
3. Provide enough spacing for adequate ventilation. (see
Chapter 1)
1. Check whether the input voltage is in the AC motor
drive rated input voltage range.
2. Check for abnormal load on the motor.
3. Check for correct input power wiring to R-S-T (for
three-phase models) without phase loss.
1. Check whether the motor is overloaded.
2. Reduce the torque compensation setting (Pr.07.02).
3. Use the next higher power AC motor drive model.
1. Check for possible motor overload.
2. Check the electronic thermal overload setting.
3. Replace the drive with a larger capacity model.
4. Reduce the current level so that the drive output
current does not exceed the value in the Motor Rated
Current (Pr.07.00).
1. Reduce the motor load.
2. Adjust the over-torque detection settings to
appropriate values (Pr.06.03–Pr.06.05).
Return the unit to the factory.
Return the unit to the factory.