Electrical Wiring - Sanyo ECO-i AHX0752 Technical Data Manual

4. System Controller

Electrical wiring

How to connect electrical wiring
(1) Connect B1, B2 to indoor PCB T10 connector using
the accessory 6P connector. (with fuse) (*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:
Power supply: DC12V *No polarity
To T10 connector on indoor PCB
B2:
B3: Not be used
B4: Auxiliary of inter-unit control wiring
B5:
Inter-unit control wiring. (Low voltage)
To indoor unit 2P terminal base (U1, U2)
B6:
*No polarity
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.
Control of W-3WAY ECO-i SYSTEM
B1
B2
B3
B4
B5
B6
System controller
<Back side of system controller>
A1
A2
A3
A4
A5
A6
RC1
Inter-unit
control wiring
1-1
3-49
Indoor unit PCB
T10
(YEL)
Accessory connctor
Wire joint connection
U1
U2
2P terminal base
Indoor unit
Fig. 3-31
Fig. 3-32
RC2 RC3
2-1 3-1
1
B6
B5
B4
B3
B2
2
B1
3
4
System controller
5
6
7
8