Electric Installation; Precautions - Gree GMV-S120WL/A-S Service Manual

12. Electric Installation

12.1 Precautions

Dangerous!
① The electric installation personnel must get related qualification.
②The air conditioning unit is category 1 electrical appliance which requires reliable
grounding.
③ The grounding resistance must meet the requirement of local low.
④ The yellow green cable inside the air conditioning unit is a grounding cable. It cannot be
used for other purposes or be cut off. Do not fix it with tapping screws. Otherwise, an electric
shock may be caused.
⑤ A reliable grounding terminal must be provided for the power. Do not connect the
grounding cable to any of the following:
a. Water pipes; b. Gas pipes; c. Drainage pipe; d. Other places deemed as unreliable.
⑥ The power cable and the communication cable must be laid separately with a distance of
greater than 20cm. Otherwise, the communication of the unit will be affected.
⑦ Both the power cable and communication cable must be connected properly. If the power
cable is connected to the communication port, the main board will be burnt.
During installation, the power cable and communication cable can be identified in the
following ways:
Method 1: Use sheaths in different colors.
The diameter of the power cable is larger than that of the communication cable. Alternatively,
adopt three cores or more for the power cable and two cores for the communication cable.
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