Transition Wiring For Remote Control Switch - Hitachi RPC-1.5FSN3 Installation & Maintenance Manual

7.4

Transition Wiring for Remote Control Switch

In the twin, triple, and quad combination of indoor units, the transition wiring for the remote control switch is
not required. However, when connecting indoor units without transition wiring for remote control switch, the
followings are limited.
(1) The following functions are available to set only to
the main unit with the remote control switch PC-ARF.
* "Remote ON/OFF function, 1 and 2"
* "Power supply ON/OFF function, 1 and 2"
* "Prohibiting operation by remote control switch"
(2) The following connection is NOT available.
(a) Connection between Main Units without Transition Wiring
When the indoor units in multiple refrigerant cycles are controlled by one remote control switch, all
the indoor units are required to be connected with the transition wirings.
Main Sub Sub
Incorrect
(b) Connection between Main Unit without Transition Wiring and Unit with Transition Wiring
When the indoor units in multiple refrigerant cycles are controlled by one remote control switch, all
the indoor units are required to be connected with the transition wirings.
Main Sub
Incorrect
(c) Connecting Remote Control Switch to Sub unit without Transition Wiring
When the indoor units are controlled by 2 remote control switches, the sub remote control switch
shall be connected to the main unit.
Main
Incorrect
32
Main Sub
Main Sub
Sub
Power Source Wiring
Transition wiring is unnecessary.
Remote
Control
Switch
(PC-ARF)
Main Sub Sub
Correct
Main Sub
Correct
Main
Correct
Main Sub
Main Sub
Sub
P5416543