Midea Vrf V4 Plus Service Manual Repack Online
R410A (Pre-charged in outdoor units; requires field calculation for additional piping). Compressor Type: High-efficiency DC Inverter Scroll.
Outdoor units can typically be combined to achieve modular capacities up to 64 HP or more, supporting dozens of indoor units on a single refrigerant circuit. Piping Flexibility: Maximum actual piping length: Up to 150–175 meters. Total piping length: Up to 1,000 meters.
: Indicates a fault with the indoor pipe or evaporator outlet temperature sensor, often caused by a short or open circuit BLOSSOM AIR-CON Oil Balance
can be connected to a single system with a maximum connective ratio of Operational Range: Operates in cooling from -5°C to 48°C and heating from -20°C to 24°C Piping Limits: Supports a total piping length of up to and a level difference of up to between indoor and outdoor units. Advanced Performance Features High-Efficiency Hardware: Brushless DC Inverter compressors all-DC fan motors
The Midea VRF V4 Plus service manual is a comprehensive guide that covers various aspects of the system, including: midea vrf v4 plus service manual
The Midea VRF V4 Plus Service Manual typically includes the following sections:
| Parameter | Details | |-----------|---------| | Capacity range | 22.4 kW – 135 kW (8HP – 48HP) | | Compressor type | High-efficiency DC Twin Rotary (8-16HP) / Scroll (18-48HP) | | Refrigerant | R410A | | Connection method | BC box (heat recovery) or direct pipe (heat pump) | | Max piping length | Up to 1,000 m total | | Max single pipe length | 200 m equivalent | | Max height difference | Outdoor above indoor: 70 m; Indoor below outdoor: 90 m | | Operating ambient | Cooling: -5°C to 54°C; Heating: -20°C to 27°C (low ambient kit to -25°C) |
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If a compressor fault code ( or P5 ) occurs, isolate the compressor to rule out electrical insulation failures or mechanical lockups. Piping Flexibility: Maximum actual piping length: Up to
: A single outdoor unit can support a connection ratio of up to 130% and connect up to 64 indoor units depending on the model.
communication bus voltage (should fluctuate between 1–3V DC). Communication Error Between Indoor and Outdoor
In conclusion, the Midea VRF V4 Plus service manual is a valuable resource for HVAC technicians, providing essential information for troubleshooting, maintenance, and repair of this advanced VRF system.
An integrated LED display on the master unit allows technicians to observe operation status and trigger Force Cooling or system checks directly. Backup Function: non-condensables | Clean coil
The outdoor unit main PCB features a digital display (usually 2 or 4 seven-segment LEDs) and tactile buttons labeled , SW2 (Down) , and SW3 (OK/Query) . Press SW3 to enter the spot check menu. Press SW1 or SW2 to scroll through parameters.
Working on a Midea V4 Plus VRF system anytime soon? Keep these three quick tips from the service manual in mind before you head to the roof:
Undercharged refrigerant; blocked filter drier; indoor indoor air filters blocked.
| Symptom | Likely Cause | Service Action | |---------|--------------|----------------| | E3 (High pressure) | Condenser fouled, overcharge, non-condensables | Clean coil, check charge, vacuum & recharge | | E4 (Low pressure) | Leak, closed EEV, filter drier blockage | Leak check, check EEV coil resistance, replace filter | | P0 (Refrigerant deficiency) | Leak or undercharge | Leak test, repair, weigh in correct charge | | No communication | Wiring error, termination resistor | Check P/Q/E polarity, add 120Ω resistor on last indoor | | Compressor noisy | Liquid slugging, low oil | Check superheat (5-8K), perform oil recovery mode |
The Midea VRF V4 Plus service manual is a comprehensive document that covers various aspects of the system, including: