Inovance SV820N Series - Page 102

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5 Troubleshooting
5
Probable Cause ConrmingMethod Corrective Action
3. Bleeder resistor failure
If an external bleeder resistor is used
(2002-1Ah=1/2), measure resistance
between P and C.
Forbleederresistorspecication,referto
the"1.5BleederResistorSpecication"
section on page 21.
Ifresistanceis"∞",wirebreakingoccursin
the bleeder resistor.
If an external bleeder resistor is used,
replace it with a new one between P and
C.
Set 2002-1Bh (power of external bleeder
resistor) and 2002-1Ch (resistance
of external bleeder resistor) correctly
accordingtothespecicationsoftheused
bleeder resistor.
4. The resistance of the
bleeder resistor is
too large, and energy
absorptionduringbraking
isinsufcient.
Measure the resistance of the external
bleeder resistor between P and C.
Compare the measured value with the
recommended value.
Connect a new external bleeder resistor of
recommended resistance between P and
C.
Set 2002-1Bh (power of external bleeder
resistor) and 2002-1Ch (resistance
of external bleeder resistor) correctly
accordingtothespecicationsoftheused
bleeder resistor.
5. The motor is in abrupt
acceleration/deceleration
status. The maximum
brakingenergyexceeds
the energy absorption
value.
Conrmtheacceleration/deceleration
time during running and measure the DC
busvoltagebetweenPandCtocheck
whether the voltage exceeds the fault
threshold during deceleration.
Ensure that the input voltage of main
circuitiswithinthespecications.Then
increase the acceleration/deceleration time
within the allowed range.
6. The bus voltage
sampling value has a
large deviation from the
actually measured value.
Checkwhether200B-1Bh(busvoltage)
iswithinthefollowingspecications:
220Vdrive:200B-1Bh>420V
Measure the DC bus voltage between
PandCandcheckwhethertheDC
bus voltage is normal and smaller than
200B-1 Bh.
Contact Inovance for technical support.
7. The servo drive is faulty.
The fault persists after the main circuit is
powered off and on several times.
Replace the servo drive.
■ E3.410: Main circuit undervoltage
Cause:
The DC bus voltage between P and N is lower than the overvoltage threshold.
220Vdrive:Normalvalue:310V,overvoltagethreshold:200V.
Probable Cause ConrmingMethod Corrective Action
1. The power supply of
main circuit is unstable or
power failure occurs.
Measure whether the input voltage of
the main circuit (RST) on non-drive side
and drive side is within the following
specications:
220Vdrive:
Effectivevalue:220V–240V
Allowederror:–10%to+10%(198Vto
264 V)
The voltages of all three phases need to
be measured.
Improve the power capacity.
2. Instantaneous power
failure occurs.
3. The power voltage drops
during running.
Checkthepowerinputvoltageand
checkwhethermainpowerisapplied
tootherdevices,resultingininsufcient
power capacity and a voltage dip.