Gree Ultra Heat GMV-V72W/A-F, Service Manual, Page: 79 / 240

Ultra Heat GMV VRF Technical Service Manual 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.
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 DIP switch must be set again, the S7 DIP switch cannot be further set,
and other DIP switches retain the factory settings without special requirements.

If above DIP switch setting is incorrect, unit will work abnormally and compressor may even be
damaged.
3.1.1 Outdoor silent mode setting DIP switch (S1)
The outdoor silent mode setting DIP switch (S1) is used to set noise grades at the place needing
low noise, such as hospital, hotel at night, no matter in the daytime or nighttime. The silent modes of unit
include standard mode, low noise mode, medium noise mode, superlow noise mode. The setting