Wiring; Outdoor Unit Wiring - Midea MSMBAU-09HRDN1-QRD0GW(B) Installation Manual

Wiring

Safety Precautions
WARNING
• Be sure to disconnect the power supply before
working on the unit.
• All electrical wiring must be done according to
local and national regulations.
• Electrical wiring must be done by a qualified
technician. Improper connections may cause
electrical malfunction, injury and fire.
• An independent circuit and single outlet must
be used for this unit. If the
electrical circuit capacity is not enough or there
is a defect in the electrical work, it can lead to
shock, fire, 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 supply connection is made
through a switch that disconnects all poles, with
contact gap of a least 3mm.
CAUTION
• Connect the outdoor wires before connecting the
indoor wires.
• Make sure you ground the unit. The grounding
wire should be away from gas pipes, water pipes,
lightning rods, telephone or other grounding
wires. Improper grounding may cause electrical
shock.
• DO NOT connect the unit with the power source
until all wiring and piping is completed.
• Make sure that you do not cross your electrical
wiring with your signal wiring, as this can cause
distortion and interference.
 Page 20 
Follow these instructions to prevent distortion when the
compressor starts:
• The unit must be connected to the main outlet.
Normally, the power supply must have a low output
impedance of 32 ohms.
• No other equipment should be connected to the
same power circuit.
• The unit' s power information can be found on the
rating sticker on the product.
NOTE: The fuse is made of ceramic.

Outdoor Unit Wiring

WARNING
Before performing any electrical or wiring work, turn off
the main power to the system.
1. Prepare the cable for connection
Cross-section area of power
Rated Current of
Appliance (A)
 6
6 - 10
10 - 16
16 - 25
25- 32
32 - 45
8
Nominal Cross-Sectional
Area (mm²)
0.75
1
1.5
2.5
4
6