GMV DC Inverter VRF
57
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.
09_Refrigerant
judgments before
startup
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.
10_Status
judgments of
outdoor valves
before startup
Outdoor valves are being turned on.
If unit detects that valve status is not normal, it will display as below:
10_Status
judgments of
outdoor valves
before startup
Outdoor valves are not fully turned on.
Then check the big and small valves whether they are fully turned on. After the check,
press SW6 return button to restart the judgments.
If unit detects that valve status is normal, it will display as below and start next progress.
10_Status
judgments of
outdoor valves
before startup
Outdoor valves are turned on normally.
Step 15:
progress 11 is “Calculate refrigerant quantity manually”
No need to operate. System will start next progress.
Step 16:
progress 12 is “Confirm debugging startup”
In order to make sure all preparation work is done before startup, this step is designed for
user to confirm the startup again. Operate as below:
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