Carrier X-POWER Series Service Manual page 32

R410a DC Inverter 60Hz
5.2
Field Wiring

The control wire should be shielded wire. Using other wiring shall create signal interference, thus
leading to error operation.

The shielded nets at the two sides of shielded wires are either grounded to the earth, or connected
with each other and jointed to the sheet metal along to the earth.

Control wire could not be bound together with refrigerant pipeline and power wire. When power wire
and control wire is distributed in parallel form, keep gap between them above 300mm so as to
preventing signal interference.

Control wire could not form closed loop.

Control wire has polarity, so be careful when connecting.
5.2.1 Signal wire between outdoor unit and indoor unit
Signal wire of indoor/outdoor unit adopts 3-core shielded wire (≥0.75mm2) which has polarity, please
connect it correctly.
5.2.2 Example wiring connection
30
master unit
slave unit
slave unit slave unit
(P Q E)
(H1 H2 E) (H1 H2 E) (H1 H2 E)
To closed end of shield wire
(P Q E)
The indoor unit at the terminal of communication system should
P
paraliel connect a impedance between port P and port Q.
(open)
Q
(H1 H2 E)
Carrier service manual
Specification & Performance