Gree GMV-400WM/B-X - Page 58

D.C. Inverter Multi VRF Modular
55
——
Debugging code
Progress code
Status code
Meaning
progress
LED1
LED2
LED3
Code
Display
status
code
Display
status
Code
Display
status
08_Confirm
preheated
compressor
db
Light
08
Light
UO
Light
Preheat time for compressor is less than
8h.
Step 13:
progress 09 is “Refrigerant judgments before startup”
If the refrigerant quantity inside the system meets the requirement of operation startup,
system will display as below and start next progress.
——
Debugging code
Progress code
Status code
Meaning
progress
LED1
LED2
LED3
Code
Display
status
code
Display
status
Code
Display
status
09_Refrigerant
judgments before
startup
db
Light
09
Light
OC
Light
System refrigerant is normal. Start next
progress.
If there’s no or not enough refrigerant in the system to meet the requirement of operation
startup, system will display U4 “refrigerant shortage protection” and fails to start next progress.
Then check if there’s any leakage or add refrigerant inside until error eliminated.
——
Debugging code
Progress code
Status code
Meaning
progress
LED1
LED2
LED3
Code
Display
status
code
Display
status
Code
Display
status
09_Refrigerant
judgments before
startup
db
Light
09
Light
O4
Light
System refrigerant is not enough. System
downtime equilibrium pressure is lower
than 0.3MPa.
Step 14:
progress 10 is “Status judgments of outdoor valves before startup”
If master unit displays below, status judgments are enabled.
——
Debugging code
Progress code
Status code
Meaning
progress
LED1
LED2
LED3
Code
Display
status
code
Display
status
Code
Display
status
10_Status
judgments of
outdoor valves
before startup
db
Light
10
Light
ON
Light
Outdoor valves are being turned on.
If unit detects that valve status is not normal, it will display as below:
——
Debugging code
Progress code
Status code
Meaning
progress
LED1
LED2
LED3
Code
Display
status
code
Display
status
Code
Display
status