Gree GMVVQ224WM/C-X Owner's Manual page 67

GMV Heat Recovery DC Inverter VRF
—
Progress
08_compressor
preheat confirmation
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.
—
Progress
09_refrigerant
judgement before
startup
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.
—
Progress
09_refrigerant
judgement before
startup
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.
—
Progress
10_ status judgment of
main pipeline before
starting
If the unit has detected the abnormal status, the display is as below:
—
Progress
10_ status judgment of
main pipeline before
starting
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.
Debugging code Progress code
LED1 LED2
Display
Code Code
status
db ON 08
Debugging code Progress code
LED1
Display
Code Code
status
db ON 09
Debugging code Progress code
LED1
Display
Code Code
status
db ON 09
Debugging code Progress code
LED1
Display
Code Code
status
db ON 10
Debugging code Progress code
LED1
Display
Code Code
status
db ON 10
Status code
LED3
Display
Code
status
ON U0
Status code
LED2 LED3
Display Display
Code
status status
ON 0C ON
Status code
LED2 LED3
Display Display
Code
status status
ON U4 ON
Status code
LED2 LED3
Display Display
Code
status status
ON ON ON
Status code
LED2 LED3
Display Display
Code
status status
ON U6 ON
63
Meaning
Display
status
The preheat time for
ON compressor hasn't reached
2h.
Meaning
The system refrigerant judgment is
normal. It will automatically enter
into the next step.
Meaning
The refrigerant in the system is
insufficient. Please charge
refrigerant until the fault
disappears.
Meaning
Starting and operating.
Meaning
Main pipeline is abnormal.