Mitsubishi Electric EZMOTION MR-E Super MR-E-10A-QW003 Instruction Manual page 158

10. TROUBLESHOOTING
Display
AL.1A Motor
combination
error
AL.20 Encoder error 2 Communication error
AL.24 Main circuit
error
www.DataSheet4U.com
AL.30 Regenerative
error
Name Definition
Wrong combination
of servo amplifier
and servo motor.
occurred between
encoder and servo
amplifier.
Ground fault
occurred at the
servo motor powers
(U,V and W phases)
of the servo
amplifier.
Permissible
regenerative power
of the built-in
regenerative resistor
or regenerative
option is exceeded.
Regenerative
transistor fault
Cause
Wrong combination of servo amplifier
and servo motor connected.
1. Encoder connector (CN2)
disconnected.
2. Encoder fault
3. Encoder cable faulty
(Wire breakage or shorted)
1. Power input wires and servo motor
power wires are in contact at main
circuit terminal block (TE1).
2. Sheathes of servo motor power
cables deteriorated, resulting in
ground fault.
3. Main circuit of servo amplifier failed.
Checking method
Alarm (AL.24) occurs if the servo
is switched on after disconnecting
the U, V, W power cables from
the servo amplifier.
1. Wrong setting of parameter No.0
2. Built-in regenerative resistor or
regenerative option is not
connected.
3. High-duty operation or continuous
regenerative operation caused the
permissible regenerative power of
the regenerative option to be
exceeded.
Checking method
Call the status display and check
the regenerative load ratio.
4. Power supply voltage is abnormal.
MR-E- A-QW003: 260VAC or
more
5. Built-in regenerative resistor or
regenerative option faulty.
6. Regenerative transistor faulty.
Checking method
1) The regenerative option has
overheated abnormally.
2) The alarm occurs even after
removal of the built-in
regenerative resistor or
regenerative option.
10 - 7
Action
Use correct combination.
Connect correctly.
Change the servo motor.
Repair or change the cable.
Connect correctly.
Change the cable.
Change the servo amplifier.
Set correctly.
Connect correctly.
1. Reduce the frequency of positioning.
2. Use the regenerative option of larger
capacity.
3. Reduce the load.
Check the power supply.
Change servo amplifier or regenerative
option.
Change the servo amplifier.