CARBEST CoolSky| 495003/4950031/495004/4950041
2.4 System wiring
WARNING:
1. Please disconnect the main power supply at first. Failure to comply with these instruc-
tions will result in electric shock hazard and further cause death or serious injury.
2. The air conditioning equipment is reserved for grounding to prevent electric shock haz-
ard. Please ensure that the equipment has been connected to a 230V/50Hz circuit with
reliable grounding.
IMPORTANT:
Electrical installation must be carried out by professionals and wiring must be conducted in
accordance with national electrical codes and industry standards.
Fixing plate
Cable gland on control box from
which the main power line will be
introduced.
Connecting wire of outdoor
ambient temperature sensor
and outdoor coil temperature
sensor.
Wire harness of
outdoor unit
control box for wiring
Corresponding
terminal on control
box
Maintenance port of
control box
Wire harness of four-
way valve
• First of all, remove the maintenance cover of
the maintenance port of the control box.
Introduce the main power line into the control
box (for about 150mm long) from the cable
gland on the control box. The cable gland
needs to be tightened to prevent the main
power line from being pulled and causing the
connection to become loose.
• Connect the white wire in the control box to the
white wire or zero wire of the main power line,
the black wire to the black wire or live wire of
the main power line, and the yellow-green wire
to the yellow-green wire or ground wire of the
main power line. All wires are recommended to
be connected by special wiring terminals, which
must be connected well and firmly.
• Put the connected wires back into the
maintenance port of the control box and fix the
maintenance cover again. Insert the plug-in wire
harness of outdoor unit pulled out from the
return air outlet of air conditioner into the
corresponding six-core terminal plug of the
control box. The three-core plug pulled out from
the return air outlet of air conditioner should be
correspondingly inserted into the three-core
terminal plug. Make sure that all plug-in
terminals are inserted in place.
• Connect other plug-in wires on the control box
correspondingly as follows:
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EN