CDE360 Vector Control AC Drive Chapter 7 Fault Detection and Diagnostics
Display
Fault Name
Possible Causes
Solutions
Er23
CBC fault
The load is too heavy.
Reduce the load
Motor is stalling.
Check the motor and
mechanical condition.
The selected drive power grade is
too small.
Select drive power grade
properly.
Er/AL24
VFD
overload
The input voltage is too low.
Adjust the voltage to normal
range.
Start again quickly when motor in
high speed rotating.
Start again when motor is stop.
The load is too heavy and the
holding time is too long.
Decrease the overload time and
decrease the load.
The acceleration/deceleration time
is too short.
Increase the
acceleration/deceleration time.
The V/F curve ratio is too high
when drive in V/F control.
Set the parameters of V/F curve
and torque boost properly.
The selected drive power grade is
too small.
Select drive power grade
properly.
Er/AL25
Motor
overload
The input voltage is too low.
Adjust the voltage to normal
range.
The DC brake current is set to high.
Decrease the value of DC brake
current.
Motor is stalling or load changed
too large.
Check the load and set the
parameter of torque boost
properly.
The drive power grade is not
matched with motor power grade.
Select the suitable motor.
The V/F curve ratio is too high
when drive in V/F control.
Set the parameters of V/F curve
and torque boost properly.
The common motor running with
lower speed, heavy load and long
time.
Change a Frequency
conversion motor or Increase
the aim frequency.
Er/AL26
Motor under
load
The AC drive running current is
lower than F0.10.
Check that the load is
disconnected.
Set the parameter of F0.10
properly.