Gree GMV-784WM/H-X - Maintenance Procedures; Outdoor Heat Exchanger Cleaning; Drain Pipe Maintenance

GMV DC Inverter VRF
62
If the unit has detected the abnormal status, the display is as below:
——
Debugging code
Progress code
Status code
Meaning
Progress
LED1
LED2
LED3
Code
Display
status
Code
Display
status
Code
Display
status
10_ status judgment of
main pipeline before
starting
db ON 10 ON U6 ON Main pipeline is abnormal
At this time, it is necessary to check whether the gas valve and the liquid valve are completely
open or whether the main pipeline is blocked. Once inspection is completed, you can return to the
previous step by pressing SW4 button to re-enter the judgment.
If inspection valve of the unit is normal, the display is as below. The unit will automatically enter
into the next step.
—— Debugging code Progress code Status code
Meaning
Progress
LED1
LED2
LED3
Code
Display
status
Code
Display
status
Code
Display
status
10_ status judgment of
main pipeline before
starting
db ON 10 ON OC ON
The main pipeline is turned on
normally
Step 14: Unit debugging step 11 is “reserved function”.
The main module display is as below. The unit automatically enters into the next step.
——
Debugging code
Progress code
Status code
Meaning
Progress
LED1
LED2
LED3
Code
Display
status
Code
Display
status
Code
Display
status
11_ reserved function db ON 11 ON AE ON
——
Step 15: Unit debugging step 12 is “reserved function”.
The master module display is as below. Then the unit automatically enters into the next step.
——
Debugging code
Progress code
Status code
Meaning
Progress
LED1
LED2
LED3
Code
Display
status
Code
Display
status
Code
Display
status
12_reserved function
db
ON
12
ON
01
ON
——
Step 16: After the unit debugging method is confirmed, the system automatically selects cooling
or heating mode according to the ambient temperature.
Once cooling/heating mode is selected, the relevant display is as below.