Gree GMV6 DC Inverter VRF Units Service Manual
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If there are two levels of menus on the master unit, you can press the SW4 back button to return to
the previous level. Press the SW4 query button again to exit query status.
If you do not press any button on the master unit in 5 minutes, the system will automatically exit the
current screen and the unit will resume displaying the current status.
4.3 Restoration to Default Settings
Restoration to default settings 1 (clearing all settings)
On the main board of the master unit, press and hold the SW1 up button and SW4 back button for
over 10 seconds to restore the system default settings. All modules display as follows:
LED1
LED2
LED3
Meaning
Address
code
Display
status
Function
code
Display
status
Status code
Display
status
Restoration to default
settings 1
ADD
On
01
On
0C
Blinks for 3
seconds
At this time, the system clears all settings, including engineering numbers of the indoor and outdoor
units, quantities of the indoor and outdoor units, and commissioning completion status.
Restoration to default settings 2 (clearing all settings except the commissioning status)
On the main board of the master unit, press and hold the SW2 down button and SW4 back button
for over 10 seconds to clear all the system settings. All modules display as follows:
LED1
LED2
LED3
Meaning
Address
code
Display
status
Function
code
Display
status
Status code
Display
status
Restoration to default
settings 2
ADD
On
02
On
0C
Blinks for 3
seconds
At this time, the system clears all settings, including engineering numbers of the indoor and outdoor
units, but stores quantities of the indoor and outdoor units, and commissioning completion status.
Restoration to default settings 3 (clearing only function settings of the outdoor unit)
On the main board of the master unit, press and hold the SW3 back button and SW4 back button for
over 10 seconds to clear all the system settings. All modules display as follows:
LED1
LED2
LED3
Meaning
Address
code
Display
status
Function
code
Display
status
Status code
Display
status
Restoration to default
settings 3
ADD
On
03
On
0C
Blinks for 3
seconds
At this time, the system clears all settings, but stores engineering numbers of the indoor and
outdoor units, quantities of the indoor and outdoor units, and commissioning completion status.
4.4 Fire Alarm Function Setting
The VRF unit system reserves a fire alarm interface "CN44", which connects with the external fire
alarm system. In case of an external fire, the unit urgently shuts down for protection based on the
received signal. Then, the unit enters the standby status.
4.5 Indoor Unit Function Applications
For details, see the service manual of the indoor unit.