YASKAWA Z1000U Technical Manual page 252

7.3 Periodic Maintenance
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), 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
HOA Keypad Alarm Display
LT-1
LT-2
LT-3
252
to indicate the specific components that may need maintenance.
Table 7.5 Maintenance Alarms
The cooling fans have reached 90% of their designated
life time.
The DC bus capacitors have reached 90% of their
designated life time.
The DC bus charge circuit has reached 90% of its
designated life time.
Function
YASKAWA SIEP YAIZ1D 01C Z1000U HVAC MATRIX Drive Bypass Technical Manual
Corrective Action
Replace the cooling fan.
Contact a Yaskawa representative or the
nearest Yaskawa sales office on
possible drive replacement.
Contact a Yaskawa representative or the
nearest Yaskawa sales office on
possible drive replacement.