YASKAWA T1000A - Page 318

7.3 Periodic Maintenance
318 YASKAWA ELECTRIC SIEP C710616 30B YASKAWA AC Drive T1000A Technical Manual
n Alarm Outputs for Maintenance Monitors
An output can be set up to inform the user when a specific components has neared its expected performance life.
When one of multi-function digital output terminals has been assigned the maintenance monitor function (H2- = 2F),
the terminal will close when the cooling fan, circulation fan, DC bus capacitors, or DC bus pre-charge relay reach 90% of
the expected performance life, or the IGBTs have reached 50% of their expect performance life. Additionally the digital
operator will display an alarm like shown in Table 7.5 to indicate the specific components that may need maintenance.
Table 7.5 Maintenance Alarms
n 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 367 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.
Alarm Display
Function Corrective Action
LED Operator LCD Operator
<1>
<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).
LT-1 The fans have reached 90% of their designated life time. Replace the fan.
<1>
LT-2
The DC bus capacitors have reached 90% of their designated life
time.
Replace the drive.
<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>
LTPC The IGBT’s have reached 90% of their designated life time. Replace the drive.