Gree U-MATCH Series Service Manual page 81

U-Match Series DC Inverter Service Manual
①. The power cord and the wire of the fresh air valve are high-voltage, while the communication cord and connection
wire of the wired controller are low-voltage. They should run separately against electromagnetic interference.
②. The high-voltage and low-voltage lines should pass through the rubber rings at different electric box covers.
③. Do not bundle the connection wire of the wired controller and the communication cord together, or arrange them in
parallel, otherwise improper operation would occur.
④. The high-voltage and low-voltage lines should be fixed separately and securely, with internal big clamps for the
former and small clamps for the latter.
⑤. Tighten the indoor/outdoor connection cord and power cord respectively on the terminal boards with screws. Faulty
connection may cause a fire.
⑥. If the indoor unit connection cord (to the outdoor unit) and power supply are wired incorrectly, the air conditioner may
be damaged.
⑦. Connect the indoor unit connection cord properly based on the corresponding marks as shown in Figure 3-2-9.
⑧. Ground both the indoor and outdoor units by attaching a ground wire.
⑨. Unit shall be grounded in compliance with the applicable local and national codes.
(6) Electric wiring of outdoor unit side
Note: When connecting the power supply cord, make sure that the phase of the power supply
matches with the exact terminal board. If not, the compressor will rotate reversely and run improperly.
Remove the big handle 24k /front board (36-60k) of the outdoor unit and insert the end of the
communication cord and the power cable into the terminal board.
 Single phase:
1) Separate Power Supply for indoor unit and outdoor unit:
L1
L2
Figure 3-2-16
CAUTION!
Figure 3-2-17
78
1 2 H1 H2