Mitsubishi Electric MELSEC-Q QD75M User Manual page 742

15 TROUBLESHOOTING
Related buffer memory
address
Axis 1 Axis 2 Axis 3 Axis 4
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Check point
Alarm (A.1E) occurs if power is
switched on after disconnection of
the U, V, W phase power cables.
Alarm (A.24) occurs if power is
switched on after disconnection of
the U, V, W phase power cables.
Connect the interface unit to the base unit properly.
Change the interface unit.
Change the base unit.
Connect the drive unit to the base unit properly.
Change the drive unit.
Change the base unit.
Connect the drive unit to the base unit properly.
Change the base unit.
Change the drive unit.
Connect correctly.
Change the servomotor.
Repair or change cable.
Connect correctly.
Change the cable.
Change the drive unit.
Change battery unit.
Always make home position setting again.
After leaving the alarm occurring for a few minutes,
switch power off, then on again.
Always make home position setting again
15 - 79
MELSEC-Q
Corrective action