LNS GT 326-E, Instruction Manual, Page: 140 / 218

9 TROUBLESHOOTING GUIDE
9 - 25
GT 326-E
AL021 Reserve
AL022 Input power phase loss
Clearing Method Turn OFF the power supply and restart the servo drive.
Potential Cause Checking Method Corrective Actions
Control power
supply is in error.
Check the power cable and
connections of R, S, and T. Check
whether the power cable is loose
or the possible loss of phase on
input power.
If the fault does not clear even
when the three-phase power is
connected correctly, please
contact your distributor for
assistance or contact with Delta.
AL023 Pre-overload warning
Clearing Method Turn OFF the power supply and restart the servo drive.
Potential Cause Checking Method Corrective Actions
The drive is going to
overload.
1. Check the load condition of the
servo motor and drive.
2. Check the setting value of P1-56.
Check whether the setting value of
P1-56 is too small.
1. Please refer to the
correction actions of
ALE06.
2. Increase the setting value of
P1-56 or set P1-56 to
100 and above.
AL024 Encoder initial magnetic field error
Clearing Method Turn OFF the power supply and restart the servo drive.
Potential Cause Checking Method Corrective Actions
The magnetic field of
the encoder U, V, W
signal is in error.
1. Check if the servo motor is
properly grounded.
2. Check if the encoder signal cables
are placed in separate conduits
from the cables connected to R, S,
T and U, V, W terminals to prevent
the interference.
3. Check if the shielded cables are
used when performing encoder
wiring.
If the error does not clear after
each checking is done, please
contact your distributor for
assistance or contact with Delta.