Page 25
Wiring
TAKE NOTE OF FUSE SPECIFICATIONS
The air conditioner’s printed circuit board
(PCB) is designed with a fuse that provides
overcurrent protection. The specications
of the fuse are printed on the circuit board,
such as:
Indoor unit: T5A/250VAC, T10A/250VAC.
(applicable for unit adopts R32 refrigerant)
Outdoor unit: T20A/250VAC(for <24000Btu/h
unit), T30A/250VAC(for >24000Btu/h unit)
Wiring
Safety Precautions
WARNING
• Disconnect the power supply before
working on the unit.
• All wiring must be performed according to
local and national regulations.
• Wiring must be done by a qualied
technician. Improper connections may
cause electrical malfunction, injury, or re.
•
•
•
An i ndependent circuit and single outlet
must be used for this unit. DO NOT plug
another appliance or charger into the
same outlet. If the cannot handle the load
or there is a defect in the wiring, it can
lead to shock, re, and unit and property
damage.
Connect the power cable to the terminals
and fasten it with a clamp. An insecure
connection may cause fire.
Make sure that all wiring is done correctly
and the control board cover is properly
installed. Failure to do so can cause
overheating at the connection points, fire,
and electrical shock.
• Ensure that main power supply connection
is made through a switch that disconnects
all poles, with contact gap of at least 3mm
(0.118”).
• DO NOT modify the length of the power
cord or use an extension cord.
CAUTION
• Connect the outdoor wires before
connecting the indoor wires.
• Make sure you ground the unit. The
grounding wire should be located away
from gas pipes, water pipes, lightning rods,
telephone wires or other grounding wires.
Improper grounding may cause electrical
shock.
• DO NOT connect the unit to the power
source until all wiring and piping is
completed.
• Make sure that you do not cross your
electrical wiring with your signal wiring.
This may cause distortion and interference.
To prevent distortion when the compressor starts
(you can nd the unit’s power information on
the rating sticker):
• The unit must be connected to the main
outlet. Normally, the power supply must
have a impedance of 32 ohms.
• No other equipment should be connected
to the same power circuit.
Outdoor Unit Wiring
WARNING
Before performing any electrical or wiring
work, turn o the main power to the system.
1. Prepare the cable for connection
a. You must rst choose the right cable size.
Be sure to use H07RN-F cables.
Table 7.1: Minimum Cross-Sectional Area of
Power and Signal Cables in North America
Rated Current of
Appliance (A)
AWG
≤ 7 18
7 - 13 16
13 - 18 14
18 - 25 12
25 - 30 10
7
NOTE: The fuse is made of ceramic.
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