Only use genuine Midea-specified Y-joint kits. Install them completely horizontally or vertically to ensure equal oil and refrigerant distribution. Pressure Testing and Evacuation
175 meters (between outdoor unit and farthest indoor unit)
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The display will alternate between the parameter code and its real-time value. Critical Parameter Check List Display Code Parameter Description Expected Normal Range Operating Mode 0 (Off), 2 (Cooling), 3 (Heating) 1. Total Capacity Requirement Varies by active IDUs 2. Corrected Capacity Requirement Varies by active IDUs 3. Compressor Inverter Frequency 0 Hz to Max (approx. 120Hz) 4. Outdoor Ambient Temperature (T4) Current outdoor ambient 5. Compressor Discharge Temperature (T5) 65°C to 95°C (Shutdown > 115°C) 6. Heat Exchanger Pipe Temperature (T3) Dependent on ambient/mode 7. Opening of Electronic Expansion Valve A 0 to 480 pulses 3. Comprehensive Error Code Matrix & Solutions
Proper installation is critical for maintaining system reliability and efficiency. : Maximum Total Pipe Length : Up to 1,000m. midea vrf v4 plus service manual
| Document Title | Key Content / Model | Where to Find | |---|---|---| | | MDV-400(14)W/DRN1(D), MDV-450(16)W/DRN1(D), MDV-500(18)W/DRN1(D) | Search for "Midea V4 Plus K Series technical service manual PDF". | | Midea V4 Plus Technical & Service Manual | Water cooled vrf (V4+W series), 3 phase, 380-415v, 50Hz | Available on manualslib.com (194 pages). | | Midea V4 Plus S Series Service Manual | R410A All DC Inverter V4+S Series 60Hz | 165-page manual, also on manualslib.com. | | Midea VRF V4 Plus I Series Manual | R410A DC Inverter V4 Plus 50Hz | 110 pages on manualslib.com. | | Installation Checklist | A 14-point checklist for ensuring a proper and safe installation of a Midea VRF system. | Available via Carrier/Bryant/Midea dealer resources. | | Midea V4+W Series Manual (2014) | Full PDF (125 pages) with general information, features, and specifications. | Download from Frigus-systems.ru. |
[Outdoor Unit] │ ├── (Max Total Piping Length: 1000m) │ ├──► [Y-Joint 1] ───► [Indoor Unit A] │ │ │ └──► [Y-Joint 2] ───► [Indoor Unit B] Critical Piping Limits : 1000 meters.
Observe the oil sight glasses on the oil balance piping assemblies during system stabilization to ensure proper distribution across multi-module configurations.
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: Advanced oil balance technology and high-efficiency centrifugal oil separators (99% efficiency) ensure compressors remain lubricated even in complex multi-unit setups. Midea Aircon Error Code E5: Meaning, Fixes & Local Tips
Clarifies communication connections like PQE (unit-to-unit communication) and XYE (automation/network connection). Troubleshooting & Maintenance
Connect a vacuum pump to both the liquid and gas sides. Evacuate the system to below -101 kPa (500 Microns) and maintain this level for at least 1 hour to ensure all moisture is removed. Additional Refrigerant Charge Calculation
Measure resistance from each terminal (U, V, W) to the functional ground loop or copper piping chassis. Expected Value: Must read infinity ( ∞infinity Only use genuine Midea-specified Y-joint kits
Total piping length up to 1000m with a 110m level difference.
The manual details several advanced features that define the V4 Plus series:
To give you an idea of the detailed technical data available in the service manual, here are the specifications for the 10HP V4+W Series model:
An integrated LED display on the master unit allows technicians to observe operation status and trigger Force Cooling or system checks directly. Backup Function: Compressor Inverter Frequency 0 Hz to Max (approx