Inovance IS620P Series - Er.420: Power Cable Phase Loss

IS620P User Manual Chapter 6 Troubleshooting
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20. Er.420: Power cable phase loss
Cause:
•
One phase or two phases get lost on the three-phase servo drive.
Cause Conrming Method Corrective Action
1. The RST cables are
not connected well.
•
Check whether the RST cables
on the servo drive side and the
non-servo drive side are in good
condition and connected securely.
Replace the cables and
connect the main circuit
correctly.
2. The single-phase
power is supplied to the
three-phase servo drive.
•
Conrm the power input
specication and the actual input
voltage. Check whether the input
voltage of each phase of the
main circuit satises 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)
•
For the servo drive of 0.75
kW (H01-02 = 5), it can be
applied by single-phase
power supply.
•
If the input voltage satises
the left specication, you can
set H0A-00 = 2 (Forbid faults
and alarms)
•
If the input voltage does not
satisfy the left specication,
replace the power supply or
adjust power capacity.
3. The three-phase power
supply is unbalanced or
the voltage is too low.
4. The servo drive is
faulty.
•
The fault remains after the main
circuit is powered off and re-
powered on several times.
Replace the servo drive.