Inovance IS620P Series - Er.410: Main Circuit Undervoltage

Chapter 6 Troubleshooting IS620P User Manual
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19. Er.410: Main circuit undervoltage
Cause:
The DC bus voltage between P and
-
is below the undervoltage level.
•
220 V drive: normal value: 310 V, overvoltage level: 200 V
•
380 V drive: normal level: 540 V, overvoltage level: 380 V
Cause Conrming Method Corrective Action
1. The main power is
unstable or fails.
•
Check the input power
specication of the drive.
Measure each phase of the RST
input voltage on the servo drive
side and check whether the
input voltage complies with the
following specication.
220 V drive:
Effective value: 220 to 240 V
Allowed error: -10% to 10% (198
to 264 V)
380 V drive:
Effective value: 380 to 440 V
Allowed error: -10% to 10% (342
to 484 V)
All the three phases must be
measured.
Increase the power capacity.
2. Instantaneous power
down occurs
3. Voltage dip occurs
during running.
•
Check the power input voltage
and check whether the same
main power is applied to other
devices, resulting insufcient
power capacity and voltage dip.
4. Phase loss exists:
Single-phase power is
supplied to the three-
phase servo drive.
•
Check whether the main circuit
RST wiring is reliable and
whether the phase loss fault
detection (H0A-00) is shielded.
Replace the cables and connect
the main circuit correctly.
Three phases: R, S, T
Single phase: L1, L2
5.The servo drive is
faulty.
•
Check whether H0B-26 (bus
voltage) is within the following
specication:
220 V drive: H0B-26 < 200 V
380 V drive: H0B-26 < 380 V
The fault remains after the main
circuit RST is powered off and re-
powered on several times.
Replace the servo drive.