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Code
Name
Er-12
Current Detection Error
Speed Reference
FRL
Missing
GF
Ground Fault
28
Causes
The load is too large.
The drive detected a minor fault
during Auto-Tuning.
There is a phase loss in the drive
input power. (U/T1, V/T2, W/T3)
The current exceeded the current
rating of the drive.
The output current is too low.
You tried Auto-Tuning without a
motor connected to the drive.
There was a current detection
signal error.
If no speed reference is selected at
start, the drive will trigger an
"FrL" fault.
Overheating caused damage to the
motor or the motor insulation is
not satisfactory.
The motor main circuit cable is
contacting ground to make a short
circuit.
An increase in the stray
capacitance of the cable and the
ground terminal caused an
increase in the leakage current.
There was a problem with the
drive hardware.
YASKAWA TOMPYEULA5001C LA500 Installation and Operation Instructions
Possible Solutions
• Decrease the load.
• Examine the machine area to see if, for
example, the motor shaft is locked.
1.
Stop Auto-Tuning.
2.
Examine the minor fault code and
remove the cause of the problem.
3.
Do Auto-Tuning again.
Examine and repair motor wiring.
• Check the motor wiring for any short
circuits between the wires.
• Check and turn ON any magnetic
contactors used between motors.
• Replace the control board or the drive.
For information about replacing the
control board, contact Yaskawa or your
nearest sales representative.
Connect the motor and do Auto-Tuning.
Replace the control board or the drive. For
information about replacing the control
board, contact Yaskawa or your nearest sales
representative.
Select speed reference before start.
Measure the motor insulation resistance, and
replace the motor if there is electrical
conduction or unserviceable insulation.
• Examine the motor main circuit cable for
damage, and repair short circuits.
• Measure the resistance between the
motor main circuit cable and the ground
terminal. If there is electrical conduction,
replace the cable.
• If the wiring length of the cable is more
than 100 m, decrease the carrier
frequency.
• Decrease the stray capacitance.
Replace the control board or the drive. For
information about replacing the control
board, contact Yaskawa or your nearest sales
representative.
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