Part 7 Electric And Controller Installation; Precautions; Installation Of The Power Cable - Gree GMV5 Series Service Manual

Part 7 Electric and Controller Installation

I. Precautions
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.
The power cable and communication cable can be identified in the following ways:
Method 1: Use sheaths in different colours.
Single-phase unit
L N
L N
Grounding
screw 1. Reliable grounding is required.
2. The screw for fixing the conducting
wire must be tightened. It must be
replaced if slipped screw head exists.
3. The external conducting wire must
be fixed by a clip. Otherwise, personal
injury or fire may occur.
Color label for
the power cable
Power cable
Method 2: Use different types of cables.
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.
Single-phase unit
L
L
Grounding
screw
1. Reliable grounding is required.
2. The screw for fixing the conducting wire
must be tightened. It must be replaced if
slipped screw head exists.
3. The external conducting wire must be
fixed by a clip. Otherwise, personal injury
or fire may occur.
Power cable (three-core)
(The yellow green cable
is the ground cable.)
Elaborate the method with the installation personnel on site no matter which method is adopted.
II. Installation of the Power Cable

1. Precautions

1) The air conditioning unit is category 1 electrical appliance which requires reliable grounding.
2) The grounding resistance must meet the requirement of local law.
3) 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.
4) A reliable ground 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
5) The power cable and the communication cable must be laid separately with a distance of greater
than 20 cm. Otherwise, the communication of the unit will be affection.
GMV5 DC INVERTER VRF UNITS SERVICE MANUAL
D1 D2 H1 H2
Indoor/outdoor unit Wired controller
communication D1 D2
H1 H2
Color label for the
communication cable
Communication cable
Indoor/outdoor
of the wired controller
communication cable
N
D1 D2 H1 H2
N
Indoor/outdoor unit Wired controller
communication D1 D2 H1 H2
Indoor/outdoor
Communication
communication cable of the wired
cable (two-core)
controller (two-core)
Three-phase unit
Grounding
screw
1. Reliable grounding is required.
2. The screw for fixing the conducting
wire must be tightened. It must be
replaced if slipped screw head exists.
3. The external conducting wire must
be fixed by a clip. Otherwise, personal
injury or fire may occur.
Color label for
the power cable
Power cable
Three-phase unit
Grounding
screw
1. Reliable grounding is required.
2. The screw for fixing the conducting wire
must be tightened. It must be replaced if
slipped screw head exists.
3. The external conducting wire must be
fixed by a clip. Otherwise, personal injury
or fire may occur.
Power cable (five-core)
(The yellow green cable
is the ground cable.)
66
D1 D2 H1 H2
Indoor/outdoor unit Wired controller
communication D1 D2 H1 H2
Color label for the
communication cable
Indoor/outdoor
Communication cable
communication cable
of the wired controller
D1 D2 H1 H2
Indoor/outdoor unit Wired controller
communication D1 D2
H1 H2
Indoor/outdoor Communication
communication cable of the wired
cable (two-core) controller (two-core)