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-oo = 2F
<1>
),
the terminal will close when the cooling fan, DC bus capacitors, or DC bus pre-charge relay reach 90% of the expected
performance life, or when the IGBTs have reached 50% of their expected performance life. Additionally the HOA keypad
will display an alarm like shown in Table 7.5 to indicate the specific components that may need maintenance.
<1> Details on this function can be found in the standard Z1000 Programming Manual (SIEPC71061645) at
www.yaskawa.com.
Table 7.5 Maintenance Alarms
HOA Keypad Alarm Display Function Corrective Action
LT-1
The cooling fans have reached 90% of their designated
life time.
Replace the cooling fan.
LT-2
The DC bus capacitors have reached 90% of their
designated life time.
Contact a Yaskawa representative or the
nearest Yaskawa sales office on
possible drive replacement.
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.
7.3 Periodic Maintenance
272
YASKAWA ELECTRIC SIEP YAIZ1B 01E YASKAWA AC Drive – Z1000 Bypass Technical Manual
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