Communication Wiring Figure - Haier InoSens MRV SI AU032FSEUA Service Manual

WARNING
■ Switch off the main power switch of the indoor
and outdoor machine for more than 1 minutes
before the wiring or regular inspection.
■ To prevent the destruction of wires and
electrical components by rats or other animals.
Serious, it may lead to the occurrence of fire.
■ To avoid damage to the wire, avoid contact
with refrigerant pipes, steel edges and
electrical components. Serious, it may lead to
the occurrence of fire.
CAUTION
■ Secure the power cord with a wire tie in the
machine.
Note:
when the wiring of the outdoor machine is not
using the wire, it should be fixed with the rubber
ring.
CAUTION
■ In the case of 3 phase 5 wire type, the
power supply of the indoor machine must be
connected use L1 line and N line, prohibit the
use of L1-L2, L1-L3, Otherwise the electrical
part will be damaged.

Communication wiring figure

Indoor 3
P Q A B C
wired
A B C
controller
■ To ensure that the electrical equipment used on the
installation site (main power switch, circuit breaker, wire,
conduit and wiring terminals, etc.) have been selected
according to current data, to ensure that the device in line
with national standards.
■ Check the power supply voltage in the range of 10% of the
rated voltage and the ground wire is included in the power
supply line. Otherwise, electrical parts will be damaged.
■ Check whether the power supply is satisfied. Otherwise, the
compressor will not start when the voltage is too low.
■ By measuring the insulation resistance between the ground
and the electrical device terminals, to ensure that more than
1 MΩ. Otherwise, the system can not be started until the
cause of leakage and maintenance.
Connection
■ Connect the power cord to the terminal of the indoor unit and
the outdoor mechanical and electrical gas box, connect the
ground wire to the grounding bolt of the outdoor machine and
the indoor mechanical and electrical air box.
■ Connect the external and internal communication lines to the
1 and the 2 terminals on the terminal. If the power cord is
connected, the printed circuit board will be damaged. And the
use of shielded twisted pair wire.
■ Do not connect the fastening screws on the front of the cover.
■ The power cord must be made of copper wire, and the power
supply must be in line with IEC 60245 requirements. If the
power cord length exceeds 20m, the need to increase the
size.
■ The power supply line is fixed with a round connection
terminal with an insulating protective sleeve. Not with sheet
metal contact and extrusion, in order to avoid the cut line of
skin caused by fire.
Outdoor
P Q
Indoor 4
P Q A B C
wired
A B C
controller
Inspect
Indoor 1
P Q A B C
Indoor 5
P Q A B C
A B C wired
controller
42
Communication wire with polarity
Indoor 2
P Q A B C
*
wired
A B C
controller
Indoor 6
P Q A B C
A B C
wired
controller
A B C
wired
controller