Hitachi SJ Series, User Manual

Page: 605 / 786

18-12
Chapter 18
Tips/FAQ/Troubleshooting
E009 Undervoltage error
A decrease of the main power supply of inverter
results in a circuit breakage. To prevent this, the
inverter turns OFF its output. When P-N voltage falls
below approx. 160Vdc (200V class) or approx.
320VDC (400V class), the output is turned OFF. By
setting the parameter, you can perform retries for a
fixed number of times without generating an error.
Furthermore, undervoltage error during stop can be
disabled by setting.
E009
Error occurred after
long hours of use.
• System environment
changes
• Capacitor deterioration
• Circuit failure
• If an undervoltage occurs frequently, the inverter may have reached
its end of life or be broken down. A repair is required.
The inverter
doesn’t
start.
• PS voltage is insufficient. • Perform power supplying in accordance with the inverter voltage
class.
Occurrence

Estimated cause(s)

Exemplar measures to be taken
There was a power
failure.
• PS voltage decreased.
• If the internal power supply hasn’t been fully turned OFF, it is
possible to re-start the inverter after the power supply is recovered,
by setting the retry function while it is still on.
Error occurred with
the start of
operation.
• PS voltage decreased.
• PS capacity is
insufficient.
• When power supply voltage decreases or power supply capacity is
insufficient, re-examination of power supply environment is
required.