Electrical Wiring - Haier MVAH018MV2AA Service Manual

9.6 Electrical wiring

• Electrical construction should be made with specific mains circuit by the qualified personnel according to the
installation instruction. Electric shock and fire may be caused if the capacity of power supply is not sufficient.
• During arranging the wiring layout, specified cables should be used as the mains line, which accords with
the local regulations on wiring. Connecting and fastening should be performed reliably to avoid the external
force of cables from transmitting to the terminals. Improper connection or fastness may lead to burning or
fire accidents.
• There must be the ground connection according to the criterion. Unreliable grounding may cause electrical
shocks. Do not connect the grounding line to the gas pipe, water pipe, lightening rod and telephone line.
• Only copper wire can be used. Breaker for electric leakage should be provided, or electric shock may occur.
• The wiring of the mains line is of Y type. The power plug L should be connected to the live wire and plug N
connected to null wire while should be connected to the ground wire. For the type with auxiliary electrically
heating function, the live wire and the null wire should not be misconnected, or the surface of electrical heating
body will be electrified. If the power line is damaged, replace it by the professional personnel of the manufacturer
or service center.
• The power line of indoor units should be arranged according to the installation instruction of indoor units.
• The electrical wiring should be out of contact with the high-temperature sections of tubing as to avoid melting the
insulating layer of cables, which may cause accidents.
• After connected to the terminal tier, the tubing should be curved into be a U-type elbow and fastened with the
pressing clip.
• Controller wiring and refrigerant tubing can be arranged and fixed together.
• The machine can't be powered on before electrical operation. Maintenance should be done while the power is
shut down.
• Seal the thread hole with heat insulating materials to avoid condensation.
• Signal line and power line are separately independent, which can't share one line. [Note: the power line, signal
line are provided by users. Parameters for power lines are shown as below: 3×(1.0-1.5) mm
signal line: 2×(0.75-1.25)mm
• 5 butt lines (1.5mm) are equipped in the machine before delivery, which are used in connection between the valve
box and the electrical system of the machine. The detailed connection is displayed in the circuit diagram.
Supply Wiring Drawing
• Indoor units and outdoor units should be connected to the power source separately. Indoor units must share one
single electrical source, but its capacity and specifications should be calculated. Indoor & outdoor units should be
equipped with the power leakage breaker and the overflow breaker.
WARNING
ATTENTION
2
( shielded line)]
28
2
; parameters for