Filter
Top Products
SC
86
8-2. Electrical Wiring
B1
Indoor unit PCB
CRV
(CN91: WHT)
2P terminal base
Indoor unit
System controller
Accessary connector
Wire joint connection
B2
B3
B4
B5
B6
U1
U2
How to connect electrical wiring
(1) Connect B1, B2 to indoor PCB CRV connector
using accessary 2P connector. (*No polarity)
Total wire length is less than 985 ft. and size is
AWG#18.
(2) Connect B5, B6 to indoor unit 2P terminal base.
(*No polarity). Wire size is AWG#18.
Basic wiring
B1:
B2:
B3: Not be used
B4: Auxiliary of inter-unit control wiring
B5:
B6:
Terminals for remote monitoring
A1: Input for turning on air conditioners concurrently.
A2: Input for turning off air conditioners concurrently.
A3:
Common input for turning air conditioners on or off.
A4: ON operation state indicator output.
A5: Alarm indicator output.
A6: Common indicator output.
Basic wiring diagram of control wiring
A max. of 64 indoor units and 30 outdoor units
can be connected in 1 system.
Up to 10 system controllers can be connected
in 1 system.
Fig. 8-3
Power supply: DC12V *No polarity
To CRV connector (CN91) on indoor PCB
Inter-unit control wiring. (Low voltage)
To indoor unit 2P terminal base (U1, U2)
*No polarity
Inter-unit
control wiring
System controller
RC1
1-1
RC2 RC3
2-1 3-1
Fig. 8-4
A1
<Back side of system controller>
A2
A3
A4
A5
A6
B6
B5
B4
B3
B2
B1
07-115 SSHP_II 5/7/07 4:00 PM Page 86