7.3 Periodic Maintenance
350 YASKAWA ELECTRIC SIEP C710616 27C YASKAWA AC Drive A1000 Technical Manual
■ Related Drive Parameters
Parameters o4-03, o4-05, o4-07, and o4-09 can be used to reset a Maintenance Monitor back to zero after a specific
component has been replaced. Refer to Parameter Table on page 400 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.
<1>
LT-3
The DC bus charge circuit has reached 90% of its designated life
time.
Replace the drive.
<1>
LT-4 The IGBT’s have reached 50% of their designated life time. Check the load, carrier frequency, and output frequency.
<2>
TrPC The IGBT’s have reached 90% of their designated life time. Replace the drive.
<1> This alarm message will be output only if the Maintenance Monitor function is assigned to one of the digital outputs (H2- = 2F). The alarm
will also trigger a digital output that is programmed for alarm indication (H2- = 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- =
2F). The alarm will also trigger a digital output that is programmed for alarm indication (H2- = 10).
Alarm Display
Function Corrective Action
LED Operator LCD Operator
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