D.C. Inverter Multi VRF Modular
55
08_Confirm
preheated
compressor
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.
09_Refrigerant
judgments before
startup
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.
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:
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