Gree GUHN48NM3A1O - Electric Wiring Design

77
U-MATCH Air
Conditioners
Service Manual
4.1.3 Power Cable Connection
1. Air-conditioning unit with single-phase power supply
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Remove the front-side panel of the outdoor unit.
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Pass the cable though rubber ring.
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Connect the power supply cable to the “L, N” terminals and the grounding screw.
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2. Air-conditioning unit with 3-phase power supply
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Remove the front-side panel of the outdoor unit.
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Attach rubber ring to the cable-cross hole of the outdoor unit.
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Pass the cable though rubber ring.
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Connect the power cable to the terminal and earthing screws marked “L1, L2, L3 & N”.
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L3”terminals and the grounding screw.
4.1.4 Connection of Signal Line of Wire Controller
Caution: Take great care when carrying out the following connections, so as to avoid malfunction of the air-
conditioning unit because of electromagnetic interference.
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The signal line of the wire controller must be separated from the power line and the connecting line
between the indoor unit and the outdoor unit.
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In case the unit is installed in a place vulnerable by electromagnetic interference, it is better to use shielded
cable or double-twisted cable as the signal line of the wire controller.
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Open the cover of the electric box of the indoor unit.
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Pull the signal cable of the wire controller through the rubber ring.
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Plug the signal line of the wire controller onto the 4-bit pin socket at the circuit board of the indoor unit.
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4.1.5 Connection of wires
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Remove the board on the right side of outdoor unit and put through the wire running hole on the outdoor
unit and put on a rubber ring.
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Secure the power connecting cord and signal control cable with wire holders and then connect
corresponding adapters.
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Fit on the front side board.
4.2 Electric Wiring Design
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Duct Type
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