Simultaneous Operation - Hitachi RPI-0.8FSG1 Service Manual

OPTIONAL FUNCTION
(4.4 Remote Control Switch)

4.4.2 Simultaneous Operation

Simultaneous Indoor Unit Operation with Remote Control Switch
[All power sources must be turned off!!]
Up to 16 indoor units can be simultaneously controlled using one remote control switch. The operation
mode such as fan, cooling or heating, the setting of air flow, the setting of temperature and the setting of
run/stop can only be set uniformly for all units. However, on/off operation of each thermostat can be done
individually. Defrosting, protective devices function, etc. are individually performed.
<PC-2H2>
* The total length of the wire shall be 200m or
shorter. (for 0.75mm2 wire 500m or shorter)
* Use the fllowing three cable wire in the
system parts.
Model PRC-10E
Length
<PC-P1H>
* Simultaneous Indoor Units Operation in Same Refrigerant Piping System
Main
Indoor Unit
Main Switch
(PC-P1H)
* Simultaneous Indoor Units Operation in Plural Refrigerant Piping Systems
Outdoor Unit
Refrigerant
System 1
Main
Indoor Unit
Main Switch
(PC-P1H)
NOTE:
Pay attention not to overlap the indoor units' addresses in case that each of intoor units have a different
refrigerant system.
(1) Perform wiring between indoor units as shown in the following figure.
Indoor Unit
1 2 A B
A B
Remote Control Switch
4-36
PRC-15E PRC-20E
10m 15m 20m
No. 1 No. 2
Indoor Unit Indoor Unit
No. 1
Indoor Unit
Indoor Unit
1 2 A B
Shielded Twist Pair Cable
for Remote Control Switch
Control Cable between
Outdoor Unit and Indoor Units
(H-Link Control Cable)
Use 0.75mm 2 shielded
twist pair cable.
0
8
RSW
Main Unit PCB
FAN HIGH SWING LOUVER ON/OFF TIMER SET TEMP.
COOL
HEAT LOW ADDS RN HR
DEFROST NO FUNCTION UNIT
DRY A/C SERVICE ABNML FILTER
+ CENTRAL
AUTO VENT H.STRG T. RUN CHECK
RUN / STOP TEMP.
Controller
Set the rotary switch to No.1
Control Cable
(H-LINK)
No. 14
Indoor Unit
Outdoor Unit
Refrigerant
System 2
Main No. 1
Indoor Unit Indoor Unit
ATTENTION:
1. Use shielded twist pair cable for indoor
2. The total length between each indoor
3. In case the remote control switch cables
1 Set
CN12 (Yellow)
CN12 (Yellow)
CN13 (Blue)
0
CN13 (Blue)
1st Branch Unit PCB
8
In case of using 0.32mm
RSW
total length of the cable must be within 200m.
No. 15
Indoor Unit
Outdoor Unit
Refrigerant
System 3
Main No. 1
Indoor Unit Indoor Unit
unit - remote control switch and indoor
unit - indoor unit.
units, indoor unit and the remote control
switch must be 500m or shorter.
connect, pay attention to check the cables
lest the H-LINK control cable is connected
accidentally.
Use an optional extension cable
2
or field-supplied 0.32mm cable.
2
cable, the
Control Cable
(H-LINK)