Inovance SV820N Series - Page 103

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5 Troubleshooting
5
Probable Cause ConrmingMethod Corrective Action
4. Phaselossexists:Single-
phase power supply is
used for the 3-phase
servo drive.
Checkwhetherthemaincircuitwiring
is correct and reliable, and whether the
phase loss fault detection (200A-01h) is
shielded.
Replace the cables and wire the power
cablescorrectly:
Three-phase:R,S,T
Single-phase:L1,L2
5. The servo drive is faulty.
Checkwhether200B-1Bh(Busvoltage)
iswithinthefollowingspecications:
220Vdrive:200B-1Bh<200V
The fault persists after the main circuit
(RST) is powered off and on for several
times.
Replace the servo drive.
■ E3.420: Main circuit phase loss
Cause:
1 or 2 phase(s) loss occurs on the three-phase servo drive.
Probable Cause ConrmingMethod Corrective Action
1. The three-phase power
cables are not connected
well.
Checkwhetherthepowercables(RST)on
servo drive side and non-servo drive side are in
good condition and connected securely.
Replace the cables and wire the
powercablescorrectly:
2. The single-phase power
supply is used for the
three-phase servo drive.
Conrmthepowerinputspecicationofthe
servodriveandtheactualinputvoltage.Check
whether the input voltage of the main circuit
satisesthefollowingspecications:
220Vdrive:
Effectivevalue:220Vto240V
Allowederror:–10%to+10%(198Vto264V)
380Vdrive:
Effectivevalue:380Vto440V
Allowederror:–10%to+10%(342Vto484V)
The voltages of all three phases need to be
measured.
For three-phase servo drive of
0.75kW(H01-10=5),single-
phase power supply is allowed.
Iftheinputvoltagesatisesthe
specicationsontheleft,setH0A-
00=2 (inhibit faults and warnings).
If the input voltage does not
satisfythespecications,replace
or adjust the power capacity
accordingtothespecicationson
the left.
3. The three-phase power
supply is unbalanced
or the voltages of three
phases are too low.
4. The servo drive is faulty.
The fault persists after the main circuit (RST) is
powered off and on several times.
Replace the servo drive.
■ E3.430: Control power undervoltage
Cause:
AC input phase loss of control power exists.
Probable Cause ConrmingMethod Corrective Action
Control power input is
unstable.
Checkwhetherthecontrolpowercablesarewell
connected and whether the AC input voltage of
controlpowersatisesspecications.
Connect the motor power cables
again or replace them.