Gree GMV-Y72WM/C-F Owner's Manual page 66

If unit detects that valve status is not normal, it will display as below:
——
Debugging code Progress code
LED1
progress
Code
10_Status
judgments of
db
outdoor valves
before startup
Then check the big and small valves whether they are fully turned on. After the check,
press SW6 return button to restart the judgments.
If unit detects that valve status is normal, it will display as below and start next progress.
——
Debugging code Progress code
LED1
progress
Code
10_Status
judgments of
db
outdoor valves
before startup
Step 15: progress 11 is "Calculate refrigerant quantity manually"
No need to operate. System will start next progress.
Step 16: progress 12 is "Confirm debugging startup"
In order to make sure all preparation work is done before startup, this step is designed for
user to confirm the startup again. Operate as below:
If master unit displays as below, system is waiting for confirmation signal.
——
Debugging code Progress code
LED1
progress
Code
12_Status
judgments of
db
outdoor valves
before startup
If it's confirmed, press SW7 confirmation button. Unit will display as below and start next
progress.
——
Debugging code Progress code
LED1
progress
Code
12_Status
judgments of
db
outdoor valves
before startup
Step 17: after unit is confirmed to start debugging, system select cooling/heating mode
LED2
Display Display
code
status status
Light 10 Light
LED2
Display Display
code
status status
Light 10 Light
LED2
Display Display
code
status status
Light 12 Light
LED2
Display Display
code
status status
Light 12 Light
Photovoltaic Direct-driven Inverter VRF
Status code
LED3
Display
Code
status
U6 Light Outdoor valves are not fully turned on.
Status code
LED3
Display
Code
status
OC Light Outdoor valves are turned on normally.
Status code
LED3
Display
Code
status
AP Blink Ready for units to start debugging.
Status code
LED3
Display
Code
status
Manual calculation of refrigerant
AE Light
quantity is set up.
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Meaning
Meaning
Meaning
Meaning