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Electrical Wiring
DC24V
DC voltage pulse
Photocoupler input
Allowable contact voltage
and current: 24 V, 10 mA
Pulse width: 300 ms or
more
COM
No-voltage a-contact
static output
Digital
Allowable contact voltage
Input
and current: 30 V, 0.5 A
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.
When using the T10 cable:
(1) Connect B1, B2 to indoor unit 2P terminal base.
(*No polarity). Wire size is AWG#W18.
(2) Connect B5, B6 to indoor PCB T10 connector using the
accessory 6P connector. (with fuse) (*No polarity)
Total wire length is less than 330 ft. and size is
AWG#W18.
When using the CRV cable:
(1) Connect B1, B2 to indoor unit 2P terminal base.
(*No polarity). Wire size is AWG#W18.
(2) Connect B5, B6 to indoor PCB CRV connector using the
accessory 2P connector. (*No polarity)
Total wire length is less than 330 ft. and size is
AWG#W18.
NOTE
Connectors are different depending on the indoor unit PCB.
Select the cable according to the indoor unit PCB.
6
SYSTEM CONTROLLER
<Back side of system controller>
A1
A2
A3
A4
A5
A6
Basic wiring
B1:
Inter-unit control wiring. (Low voltage)
To indoor unit 2P terminal base (U1, U2)
B2:
*No polarity
B3:
Auxiliary of inter-unit control wiring
B4:
Not be used
B5:
Power supply: DC 12 V *No polarity
B6:
To CRV connector or T10 connector on indoor PCB
T10 cable
T10 cable
CRV cable
Fig. 2
Fig. 3
Fig. 4
T10 connector
Use the T10 cable.
T10 connector
Use the CRV cable.
CRV connector
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