D.C. Inverter Multi VRF Modular 
 
56 
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: 
If master unit displays as below, system is waiting for confirmation signal. 
12_Status 
judgments of 
outdoor valves 
before startup   
Ready for units to start debugging. 
If  it’s  confirmed,  press  SW7  confirmation  button.  Unit  will  display  as  below  and  start  next 
progress. 
12_Status 
judgments of 
outdoor valves 
before startup   
Manual calculation of refrigerant quantity 
is set up. 
Step  17: 
after  unit  is  confirmed  to  start  debugging,  system  select  cooling/heating  mode 
according to ambient temperature. 
A    If cooling mode is selected, relevant display is as below: