Digital Operator Alarm Display Function Corrective Action
<1>
LT-3
The DC bus charge circuit has reached 90% of its
designated life time.
Contact a Yaskawa representative or
the nearest Yaskawa sales office on
possible drive replacement.
<1>
LT-4
The IGBTs have reached 50% of their designated life
time.
Check the load, carrier frequency, and
output frequency.
<2>
TrPC
The IGBTs have reached 90% of their designated life
time.
Contact a Yaskawa representative or
the nearest Yaskawa sales office on
possible drive replacement.
<1>
This alarm message will be output only if the Maintenance Monitor function is assigned to one of the digital outputs (H2-oo = 2F). The alarm
will also trigger a digital output that is programmed for alarm indication (H2-oo = 10).
<2>
This alarm message will always be output, even if the Maintenance Monitor function is not assigned to any of the digital outputs (H2-oo =
2F). The alarm will also trigger a digital output that is programmed for alarm indication (H2-oo = 10).
n
Related Drive Parameters
Use parameters o4-03, o4-05, o4-07, and o4-09 to reset a Maintenance Monitor to zero after replacing a specific component.
Refer to Parameter List on page 329 for details on parameter settings.
NOTICE: If these parameters are not reset after the corresponding parts have been replaced, the Maintenance Monitor function will
continue to count down the performance life from the value that was reached with the old part. If the Maintenance Monitor is not reset,
the drive will not have the correct value of the performance life for the new component.
7.3 Periodic Maintenance
YASKAWA ELECTRIC SIEP C710606 16C YASKAWA AC Drive – V1000 Technical Manual
295
7
Periodic Inspection &
Maintenance
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