Ulvac MS120A, Инструкция по эксплуатации

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48
YO20-0938-DI-001-00
Indication Alarm Name Status
PF
（PF）
Abnormal voltage in the
main circuit Main-circuit DC voltage fluctuates excessively more
than that during regeneration.
Cause Measures Reference
An open-phase has occurred in the
input power.
Check the input power supply wiring for breaks
and miss-wiring.
➡
Install wiring for the power supply correctly.
3.6.1
Excessive fluctuations in voltage
of the input power supply.
Check the power supply voltage.
➡
Take measures to stabilize the power supply.
3.6.1
Phase voltage imbalance
Inverter failure
Contact to ULVAC service center.
End of
Document
Indication Alarm Name Status
STo
（STo）
Inputting external
interlock signals An external interlock signal was input to the wiring
for remote operation.
Cause Measures Reference
An external interlock signal is
input. Check the external interlock conditions.
➡
Release the external interlocks.
3.6.2
The external interlock is broken or
not wired.
Check the wiring for remote control for breaks and
miss-wiring.
For local operation, check that pins 13 and 14 are
short-circuited.
➡
Install wiring for remote control correctly.
3.6.2
Indication Alarm Name Status
LT-2
（LT-2）
LT-3
（LT-3）
LT-4
（LT-4）
Expiration of maintenance
period The period that the inverter needs to be
replaced has expired.
Cause Measures Reference
The period that the inverter
needs to be replaced has
expired.
It is recommended to overhaul including
replacement of the inverter.
➡
Contact the ULVAC service center.
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this manual