Hitachi RPI-0.8FSG1 - Simultaneous Operation

4-36
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.
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.
ATTENTION:
1. Use shielded twist pair cable for indoor
unit - remote control switch and indoor
unit - indoor unit.
2. The total length between each indoor
units, indoor unit and the remote control
switch must be 500m or shorter.
3. In case the remote control switch cables
connect, pay attention to check the cables
lest the H-LINK control cable is connected
accidentally.
Model PRC-10E
PRC-15E PRC-20E
Length 10m 15m 20m
<PC-P1H>
* Simultaneous Indoor Units Operation in Same Refrigerant Piping System
Main Switch
(PC-P1H)
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
* Simultaneous Indoor Units Operation in Plural Refrigerant Piping Systems
Main Switch
(PC-P1H)
Main
Indoor Unit
No. 1
Indoor Unit
No. 2
Indoor Unit
No. 14
Indoor Unit
No. 15
Indoor Unit
Control Cable
(H-LINK)
Indoor Unit
12AB
Remote Control Switch
AB
Indoor Unit
12AB
Use 0.75mm
2
shielded
twist pair cable.
Shielded Twist Pair Cable
for Remote Control Switch
Control Cable between
Outdoor Unit and Indoor Units
(H-Link Control Cable)
<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.
TEMP.
RUN / STOP
NO FUNCTION
FAN
COOL
HEAT
DRY
AUTO
HIGH
LOW
A/C
VENT
+
SWING
DEFROST
CENTRAL
H.STRG
SERVICE
ON/OFF TIMER
SET TEMP.
RN
HR
FILTER
T. RUN
ABNML
CHECK
ADDS
UNIT
LOUVER
Controller
Main Unit PCB
CN13 (Blue)
CN12 (Yellow)
CN13 (Blue)
CN12 (Yellow)
0
1
2
3
4
5
6
7
8
9
A
B
C
E
F
D
RSW
RSW
0
1
2
3
4
5
6
7
8
9
A
B
C
E
F
D
Set the rotary switch to No.1
1st Branch Unit PCB
1 Set
Use an optional extension cable
or field-supplied 0.32mm
2
cable.
In case of using 0.32mm
2
cable, the
total length of the cable must be within 200m.