Gree GMV-S280W/A-X

GMV5 Home DC Inverter Multi VRF Units
215
startup
the next step.
If there is no or not enough refrigerant inside the system to meet the operation startup
requirements, system will display U4 Refrigerant shortage protection and fail to continue with the
next progress. In this case, check for leakage or add refrigerant until error disappears.
Commissioning
code
Progress code
Status code
Meaning
Progress
LED1
LED2
LED3
Code
Display
status
Code
Display
status
Code
Display
status
09_Refrigerant
detection before
startup
db
ON
09
ON
U4
ON
System detects insufficient
refrigerant and stops to balance
the pressure lower than 0.3Mpa.
Step 14: Progress 10 is Outdoor unit valves detection before startup.
If master unit displays as follows, it means valves detection is being started.
Commissioning
code
Progress code
Status code
Meaning
Progress
LED1
LED2
LED3
Code
Display
status
Code
Display
status
Code
Display
status
10_
Outdoor unit valves
detection before
startup
db
ON
10
ON
ON
ON
Outdoor unit valves are
being inspected.
If the unit detects that valve status is not normal, it will display as follows:
Commissioning code
Progress code
Status code
Meaning
Progress
LED1
LED2
LED3
Code
Display
status
Code
Display
status
Code
Display
status
10_
Outdoor unit valves
detection before
startup
db
ON
10
ON
U6
ON
Outdoor unit valves are
not fully opened.
In this case, check the big and small valves whether they are fully opened or not. After the
check, press SW6 to return to the previous step and restart valves detection.
If it is detected that valve status is normal, system will display as follows and automatically
enter the next progress.
Commissioning
code
Progress code
Status code
Meaning
Progress
LED1
LED2
LED3
Code
Display
status
Code
Display
status
Code
Display
status
10_
Outdoor unit valves
detection before startup
db
ON
10
ON
OC
ON
Outdoor unit valves are
opened properly.