Hitachi RPI-1.0FSG1 - Page 343

4-39
OPTIONAL FUNCTION
(4.4 Remote Control Switch)
<PC-P1H>
(1) By installing an additional remote control switch, a maximum of 16 units can be controlled from two
different locations.
Main and Sub Control Switch
Determine one of the two remote control switches to be the main switch and the other as a sub
switch. Set the sub remote control switch by referring to the “4.4.4 (31) Optional Function Setting”.
Then turn off and on the power source.
(2) Wiring Method
(a) Perform wiring between units as shown in the following figure:
(Three Unit Case)
* Simultaneous Indoor Units Operation in Same Refrigerant Piping System
(b) Decide the number of units. The method should be the same as in “Simultaneous Indoor Unit
Operation with One Remote Control Switch”.
* Simultaneous Indoor Units Operation in Plural Refrigerant Piping Systems
Connector Cable
Between Units
Main Switch
(Remote
Control Switch)
Main
Indoor Unit
No. 1
Indoor Unit
Outdoor Unit
Refrigerant
System 1
Main
Indoor Unit
No. 1
Indoor Unit
Main
Indoor Unit
No. 1
Indoor Unit
Control Cable
(H-LINK)
Outdoor Unit
Refrigerant
System 2
Outdoor Unit
Refrigerant
System 3
Connector Cable
Between Units
Main Switch
(Remote
Control Switch)
Sub Switch
(Remote
Control Switch)
Control Cable
(H-LINK)
Main
Indoor Unit
No. 1
Indoor Unit
No. 2
Indoor Unit
No. 14
Indoor Unit
No. 15
Indoor Unit
ATTENTION:
1. When a main remote control switch malfunctions, unit operation stops. The units cannot be operated
with only a sub-remote control switch.
2. When a main switch and a sub-switch are simultaneously operated, the units will operate according to
either one of the modes after 30 seconds.