Hitachi America Ltd. RCU SERIES
4. Wiring
4.1 Cautions in wiring
Connect the ground cable surely.
If multiple units are to be installed, Do not make the loop with the
ground cables like figure (b) below.
RCU
#1
RCU
#2
RCU
#3
RCU
#1
RCU
#2
RCU
#3
( O )
( X )
Only a competent electrician should carry out the wiring.
Make sure that the input main voltage is switched off.
Fasten the terminal screws to the relevant torque value and make
sure that there are not loose terminals.
The signal cables must be isolated from the power cables. For an
unavoidable case, install perpendicular to each other as shown below.
Link the RCU output-side terminals (R, S, T) between main input
power and input AC reactor or filter of the inverter. Otherwise,
malfunction of the RCU or inverter could result.
Main
Power
INV
RCU
( O )
Main
Power
INV
RCU
( X )
Call 1(800)985-6929 for Sales
Call 1(800)985-6929 for Sales