Delta Electronics VFD-M Series, User Manual

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Chapter 6 Fault Code Information and Maintenance
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6-2 Revision May 2008, ME14, SW V3.04
Fault Name Fault Descriptions Corrective Actions
The AC drive temperature sensor
detects excessive heat.
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 on the
heat sinks and check for possible dirty
heat sink fins.
4. Provide enough spacing for adequate
ventilation.
The AC drive detects that the DC
bus voltage has fallen below its
minimum value.
Check whether the input voltage falls within
the rated AC drive’s input voltage.
The AC drive detects excessive
drive output current.
Note: The AC drive can withstand
up to 150% of the rated current for
a maximum of 60 seconds.
1. Check whether the motor is overloaded.
2. Reduce torque compensation setting as
set in Pr.54.
3. Increase the AC drive’s output capacity.
Internal electronic overload trip
1. Check for possible motor overload.
2. Check electronic thermal overload
setting.
3. Increase motor capacity.
4. Reduce the current level so that the
drive output current does not exceed
the value set by the Motor Rated
Current Pr.52.
Motor overload. Check the
parameter settings (Pr.60 to
Pr.62)
1. Reduce the motor load.
2. Adjust the over-torque detection setting
to an appropriate setting.
Over-current during acceleration:
1. Short-circuit
at motor output.
2. Torque boost too high.
3. Acceleration time too short.
4. AC drive output capacity is
too small.
1. Check for possible poor insulation at
the output line.
2. Decrease the torque boost setting in
Pr.54.
3. Increase the acceleration time.
4. Replace with the AC drive with one that
has a higher output capacity (next HP
size).
Over-current during deceleration:
1. Short-circuit
at motor output.
2. Deceleration time too short.
3. AC drive output capacity is
too small.
1. Check for possible poor insulation at
the output line.
2. Increase the deceleration time.
3. Replace with the AC drive with one that
has a higher output capacity (next HP
size).