Gree Ultra Heat GMV-VQ72W/A-F, Service Manual, Page: 91 / 207

Ultra Heat GMV VRF Technical Service Manual_Heat Recovery Serial COMMISSIONING OPERATION
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3.1 System Function DIP Switch Settings
DIP
Switch
Name Meaning
Factory
Settings
Remark
S1
Outdoor silent
mode setting
DIP Switch
Sets the noise grades of unit
when necessary, especially for
hospital.
00
This DIP switch is used to set noise grades
at the place needing low noise.
S2
Outdoor fan
static pressure
setting DIP
switch
Sets the static pressure of the
fan according to the static
pressure of the exhaust pipeline
connected with the engineering
unit, to guarantee normal
operation of the unit.
00
This DIP switch should be set based on
actual engineering conditions, neither
over-large nor over-small. It is unnecessary
to change the factory settings in outdoor
scenarios.
S3
Centralized
control address
DIP switch
Defines and differentiates
addresses of different systems
in the case of centralized control
by multiple systems.
00000
The address DIP switch is used only when
centralized control is required. Otherwise,
the factory settings are used without being
changed. The address DIP switch is valid
only when it is set on the master unit.
S4
Module
emergency DIP
switch
Provides after sales emergency
setting for module.
00
It is better not to use the emergency
function. Repair malfunctions at the first
time when an exception occurs.
S5
Reserved DIP
switch
——
00
——
S6
Reserved DIP
switch
——
00
——
S7
Master unit
setting DIP
switch
Defines the master unit. 00
A master unit must be set, and only one
master unit can be set in each refrigerating
system. This DIP switch is mandatory. The
default factory setting is the master unit
status.

On the master module, the S3 and S7 DIP switch must be set again, and other DIP switches retain the
factory settings without special requirements.

Function DIP switch must be set only when ODUs are powered off, then the settings are valid after
ODUs are powered on.

If above DIP switch setting is incorrect, unit will work abnormally and compressor may even be
damaged.