Multi VRF Indoor
Unit Service Manual
73
5 ELECTRICAL INSTALLATION
5�1 Precautions for Electrical Installation
The wiring must be in accordance with the local rules.
Rated supply voltage and special circuit for air conditioner must be used.
Do not pull the power cord forcefully.
All the electric installations must be carried out by specialist technicians in accordance with the local
laws, rules and these instructions.
The earthing shall be reliable and connected to the special earthing device on the construction. The
installation must be done by specialist technicians. The leak protection switch and air switch with enough
capacity must be installed. The air switch shall have both the magnetic tripping and thermal tripping functions to
ensure protection against the short circuit and overload.
● Earthed Requirements
The air conditioner belongs to I type electric appliances. The reliable earthed action is a must.
The yellow and green wire inside the air conditioner is the earthed wire. Do not use it for other purpose
The earthed resistance must meet the requirements of national standard GB17790.
There should be reliable earthed terminal for the power supply. Never connect the earth lead to the
following articles:
①
water pipe;
②
gas pipe;
③
drain pipe;
④
unreliable place considered by professionals.
5�2 DIP Switches
The DC inverter GMV unit of Gree is provided with three DIP switches, i.e. address DIP switch, capacity
dial-up and function DIP switch. Adjust the function DIP switch to set control, mode and function; Adjust the
address DIP switch to set the corresponding relationship of indoor unit and wired controller; Adjust the capacity
DIP switch to set capacity demand of indoor unit.
4.2.1 Function DIP Switch S7
Caution!
Functional
DIP switch
S7 is located on the mainboard of the indoor unit.It is operated when the user needs
to change the default setting.
Functional DIP switch S7
DIP switch Functional description:
DIP switch setting
0 (ON Position) 1
1(S / R) Setting of memory mode Standby (S) Restore (R)
2(L / I) Setting of control mode Wired control (L) Remote control (I)
3(M / S) Setting of master / slave indoor unit Master indoor unit (M) Slave indoor unit (S)
4(I / O) Setting of ambient temperature setpoint Air inlet (I) Receiver (O)
5(L / H) Setting of high / low static pressure fan Low static pressure (L) High static(H)
Functional description of function DIP switch:
DIP switch 1 (S/R):
Setting of memory mode, including the standby mode and restoration mode. The standby mode refers
to that the previous parameters will be kept but the unit will not run automatically after the power supply is
resumed. This DIP switch is factory defaulted to be at the “ON” position. For example, if the parameters of an
indoor unit set before power shutdown are High Fan and 24
, the unit will be under standby state after the
power supply is resumed and after the unit is manually started, the parameters will remain as High Fan and
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