Inovance SV820N Series - Page 99

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5 Troubleshooting
5
■ E3.201: Overcurrent
Cause:
Hardware overcurrent is detected.
Probable Cause ConrmingMethod Corrective Action
1. References are input
simultaneously at the
servo drive startup or
the reference input is too
early.
Checkwhetheranreferenceisinput
beforethekeypaddisplays"ry."
Referencesequence:Afterthekeypad
displays "ry", turn on S-ON signal and
input reference.
Ifallowed,addreferenceltertime
constant or increase acceleration/
deceleration time.
2. The motor cables are in
poor contact.
Checkwhethertheservodrivepower
cables and motor UVW cables are loose.
Tighten the cables that are loose or are
disconnected.
3. The motor cables are
grounded.
After ensuring the servo drive power
cables and motor cables are connected
securely, measure whether the insulation
resistance between the servo drive UVW
cablesandgroundcable(PE)isMΩ-
level.
Replace the motor if the insulation is
poor.
4. The motor UVW cables
are short circuited.
Disconnectthemotorcablesandcheck
whether they are short circuited and
whether burrs exist.
Connect the motor cables correctly.
5. The motor is damaged.
Disconnect the motor cables and
measure whether the resistance
between motor cables UVW is balanced.
Replace the motor if the resistance is
unbalanced.
6. The gain setting is
improper and the motor
oscillates.
Checkwhetherthemotoroscillatesor
generates a shrill noise during motor
startup and running. You can view
"currentfeedback"byusingthedrive
Inovance servo commissioning software.
Carry out gain adjustment.
7. The encoder cable
is incorrectly wired,
corrosive, or inserted
loosely.
Checkwhethertheencodercable
is used according to the standard
conguration.Checkwhetherthecable
is aging, corrosive or loose.
Turn off the S-ON signal, rotate the
motorshaftmanually,andcheckwhether
200B-12h (Electrical angle) changes as
the motor rotates.
Re-weld, fasten or replace the encoder
cable.
8. The servo drive is faulty.
The fault persists after the motor cables
are disconnected and the servo drive is
powered on again.
Replace the servo drive.
9. Bleeder resistor
overcurrent
Checkwhetherexternalbleederresistor
resistance value is small or the bleeder
resistor is short-circuited (P and C ends
at main circuit input terminal).
Select new resistance value and model of
the bleeder resistor.
Perform the wiring again.
■ E3.202: Soft-start relay wire-breaking
Cause:
Soft-startrelayiswire-breaking.