Chapter 6 Fault Code Information and Maintenance |
6-2 Revision July 2008, EG03, SW V1.06
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 heatsinks 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.7-02.
3. Increase the AC drive’s output capacity, i.e.
bigger horsepower drive.
Internal electronic overload
trip
1. Check for possible motor overload.
2. Check electronic thermal overload setting.
3. Increase motor capacity, i.e. larger horsepower
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.
Motor overload. Check the
parameter settings
(Pr.6-03 to Pr.6-05)
1. Reduce the motor load.
2. Adjust the over-torque detection setting to an
appropriate setting (Pr.06-03 to Pr.06-05).
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.
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.7-02.
3. Increase the acceleration time.
4. Replace with the AC drive with one that has a
higher output capacity (next HP size).
