Gree GMV-784WM/H-X - Operation Instructions; Refer to Controller Manuals

GMV DC Inverter VRF
61
——
Debugging code
Progress code
Status code
Meaning
Progress
LED1 LED2 LED3
Code
Display
status
Code
Display
status
Code
Display
status
08_compressor
preheat confirmation
db ON 08 ON OC ON
Compressor's preheat time has
reached 2h, and then it will enter
into the next step.
If the preheat time for compressor hasn't reached 2h, there will be abnormal phenomenon. 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
08_compressor preheat
confirmation
db ON 08 ON U0 ON
The preheat time for compressor
hasn't reached 2h.
Step 12: Unit debugging step 09 is “refrigerant judgment before startup”.
If the amount of refrigerant inside the system satisfies the requirements for starting the operation,
the display is as below. Then it 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
09_refrigerant
judgement before
startup
db ON 09 ON 0C ON
The system refrigerant judgment is
normal. It will automatically enter
into the next step.
If there is no refrigerant in the system or the amount of refrigerant does not meet the
requirements for starting operation, the unit will display U4 “Refrigerant-lacking protection”, as shown
below. The unit will enter into the next step. At this time, it is necessary to check whether there is a
leak or charge some refrigerant until the abnormality is eliminated.
—— Debugging code Progress code Status code
Meaning
Progress
LED1
LED2
LED3
Code
Display
status
Code
Display
status
Code
Display
status
09_refrigerant
judgement before
startup
db ON 09 ON U4 ON
The refrigerant in the system is
insufficient. Please charge
refrigerant until the fault
disappears.
Step 13: Unit debugging step 10 is “status judgment of main pipeline before starting”.
If the main module displays as below, it indicates the unit is starting the operation for judgment.
——
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 ON ON Starting and operating