Gree GMVVQ224WM/C-X - Page 67

GMV Heat Recovery DC Inverter VRF
63
—
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.
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.