Chapter 4 Operation
31
Figure 4-7 Inverter de-energy interface
(4) After pressing ENTER to confirm, the DC bus
capacitor begins to discharge. When the de-energy process
is completed, the indication on the LCD is shown in Figure
4-8. It is recommended that the voltage of DC BUS capacitor
should be measured to ensure it reaches the safe voltage
before maintenance.
Figure 4-8 De-energy completed
(5) If “De-energy” fails, as shown on the LCD in Figure
4-9, the AC circuit breaker should be turned off and keep the
DC circuit breaker turned off as well for the manual
discharging. The inverter should not be maintained until the
voltmeter shows that there is no electric charge left in the DC
bus capacitor.
