Unit Control; General Control Method; Schematic Diagram Of Unit Control; Chapter 2: Control - Gree GMV-S120WL/A-S Service Manual

1. Unit Control

1.1 General Control Method

1.1.1Schematic Diagram of Unit Control

Main board of master outdoor unit
Temp
eratur
Electronic
expansion
senso
valve
GMV5 Home System includes one outdoor unit and 64 indoor units (indoor air conditioner,
external-coiled water tank and hydro box). Up to 6 external-coiled water tanks and hydro boxes
can be connected. Communication between indoor units and outdoor unit is connected by CAN
network 2-core (4-core needle stand) communication wire. It adopts non-polar auto addressing
method to realize communication, no need of setting address manually. During engineering
installation, it is necessary to set up outdoor unit main board DIP switch correctly to define the
special application functions. Below are the definitions:
GMV5 Home DC Inverter Multi VRF Units

Chapter 2: Control

Inverter drive control
system
Curr
ent
e
Relay
voltage
trans
output
switch
form
r
er
Wir
ed
con
troll
er
Wir
ed
con
troll
er
Indoor section (indoor air conditioner, external-coiled water tank, hydro box)(64
sets can be connected in maximum)
High
45
Wir
ed
con
troll
er
Wir
ed
con
troll
er