Electrical Wiring - Hitachi PC-ARF Technical Catalogue

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8 Control support devices

8.5.3.2 Electrical wiring

1 Make sure that indoor unit is switched off, and then, open the electrical box.

2 Disconnect the Remote Control (RCS) cable from the electrical box terminals of the indoor unit and connect it into the

PC-AMTB screw terminals "RC-A,B".

3 Disconnect the H-LINK cable from the electrical box terminals of the indoor unit and connect it into the PC-AMTB

screw terminals "HLINK1-1,2".

4 Remove wire <4> from IU electrical box (from terminal box and "CN2" connector).

5 Connect wire <1> from PC-AMTB "HLINK 2" connector to IU PCB "CN2".

6 Disconnect EVI wire <3*> from IU PCB "CN11" and switch it to connector wire <3>. The other ending of wire <3>

must be switched to PC-AMTB "EV OUT".

7 Connect wire <2> between PC-AMTB "EV IN" and IU PCB "CN11".

8 Connect power wires <5> to PC-AMTB screw terminals "POWER SUPPLY".

INDOOR UNIT BEFORE PC-AMTB CONNECTION

INDOOR UNIT AFTER PC-AMTB CONNECTION

PCB: Printed circuit board.

EVI: Indoor unit expansion valve.

Connectors in wires named after connectors in PC-AMTB and IU PCB.

TCGB0106 rev.0 - 12/2014

Indoor unit electrical box

Indoor unit electrical box