44
①
Table of selection of communication wiring diameter
Function
Indoor unit and outdoor unit communication
One controller
to one indoor
unit (Two
controllers to
one indoor unit)
Communication
One-to-more
(centralized
controller)
Communication
Item
HyperLink (M1M2)
communication
(Indoor units are
powered separately)
HyperLink (M1M2)
communication
(Indoor units are
powered uniformly)
P/Q
communication
(Indoor units are
powered uniformly)
P/Q/E
communication
(Indoor units
are powered
uniformly)
X1X2
communication
D1D2
communication
Wire
diameter
2 × 1.5mm
2
Wire
resistance ≤
1.33Ω/100m
2 × 0.75mm
2
2 × 0.75mm
2
(shielded cable)
3 × 0.75mm
2
(shielded cable)
2 × 0.75mm
2
(shielded cable)
2 × 0.75mm
2
(shielded
cable)
Length
≤ 600m
(add two repeaters)
≤ 2000m
≤ 1200m
≤ 1200m
≤ 200m
≤ 1200m
CAUTION
Please select the communication wiring according to the requirements in the above reference table. Use
shielded cables for communication when strong magnetism or interference is present.
On-site wiring must comply with the relevant regulations of the local country/region and must be completed
by professionals.
Do not connect the communication wiring when the power is on.
Do not connect the power supply cable to the communication terminal; otherwise, the main control board
may be damaged.
The standard value of the screw torque of the communication wiring terminal is 0.5N·m. Insufficient torque
may cause poor contact; excessive torque may damage the screws and power supply terminals.
Both HyperLink (M1M2) communication and PQ communication are internal and external, so only one of the
two can be selected. Do not connect both HyperLink (M1M2) communication wiring and PQ communication
wiring to the same system, otherwise the indoor unit and outdoor unit cannot communicate normally.
If some of the indoor units in the same refrigerant system are non-V8 series, only P/Q/E communication
can be selected for the indoor unit and outdoor unit communication. The three-core shielded cable of
3×0.75mm2 is required to connect "P", "Q", and "E".
Do not bundle the communication wiring with the refrigerant pipeline, power supply cable, etc. When the
power supply cable and the communication wiring are laid in parallel, a distance of more than 5cm should
be maintained to prevent interference from the signal source.
When the construction personnel of the indoor unit and outdoor unit are working separately, information
communication and synchronization are required. Do not connect the outdoor unit to HyperLink (M1M2)
and the indoor unit to PQ. Do not connect the outdoor unit to PQ and the indoor unit to HyperLink (M1M2).
Bonding and connecting the communication wiring should be avoided, but if it is used, at the very least,
ensure a reliable connection by crimping or soldering and make sure the copper wire at the connection is
not exposed; otherwise, communication failure may occur.
