Hitachi America Ltd. RCU SERIES
16
5. Operation
5.1 Display description
Figure 5.1 keypad display description
5.2 Operation
1
Refer to wiring diagram in Chapter 4.2 and connect inverter, RCU, and control I/O
Check the RCU P (+) terminal is connected to the inverter DC Link (+) and the RCU
N (-) terminal is connected to the inverter DC Link (-). If this condition were not
satisfied, RCU could be broken.
2
After power is supplied to inverter, Check if RCU display on keypad behaves
properly. If the display is not good, please check wiring with the inverter.
3
Enter the DI 1-RUN and DI 2-Enable signal to RCU.
4
When regenerative energy is generated by inverter driving mode, RCU has a
regenerative state. If the magnitude of the regenerative current is not displayed or
fault code (Fxx) is displayed, check the operation status and the status of the wiring
and control signal input, please.
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