[Outdoor Unit] │ ├── (Max Total Piping Length: 1000m) │ ├──► [Y-Joint 1] ───► [Indoor Unit A] │ │ │ └──► [Y-Joint 2] ───► [Indoor Unit B] Critical Piping Limits : 1000 meters.
Must use 2-core stranded, shielded twisted-pair (STP) cable with a minimum cross-section of
When combining multiple outdoor modules, you must designate one Master unit and assign subsequent addresses to Slave units. Turn off all power before altering switch positions. Master Unit (Primary system controller) 1: Slave Unit 1 2: Slave Unit 2 3: Slave Unit 3 Communication Wiring (PQE Connection) midea vrf v4 plus service manual
• Check system for refrigerant leaks.• Verify that indoor air filters and coils are clean.• Check the operation of the electronic expansion valves (EEVs). Discharge temperature protection
: A single outdoor unit can support a connection ratio of up to 130% and connect up to 64 indoor units depending on the model. [Outdoor Unit] │ ├── (Max Total Piping Length:
: Overcurrent protection for the inverter compressor, often requiring resistance checks (normally 0.9 to 5 ohms ).
System startup requires rigorous physical processing to guarantee long-term reliability. The Triple Vacuum Method Master Unit (Primary system controller) 1: Slave Unit
The digital display on the outdoor unit PCB flashes specific alphanumeric codes during system faults. Below is a comprehensive diagnostic matrix for cross-referencing. Outdoor Unit Fault Codes Fault Description Primary Cause Troubleshooting Actions Communication error between outdoor units
: First, check the compressor by measuring resistance between U, V, W terminals (should be 0.9~5 Ohms) and to ground (should trend to infinity). If resistance values are normal, the issue might be with the inverter module or main PCB.
What (if any) is flashing on the outdoor or indoor display?
: The 10HP V4+W Series unit has net dimensions of 780×1000×550 mm (W×H×D) and weighs 146.0 kg.