Midea Vrf V4 Plus Service Manual May 2026

Technical Service Report: Midea VRF V4 Plus Series

1. Introduction

The Midea VRF (Variable Refrigerant Flow) V4 Plus series represents a high-efficiency, intelligent commercial air conditioning system. This service manual provides comprehensive technical data for installation, operation, maintenance, and troubleshooting of the V4 Plus range, including heat pump (YCOE) and heat recovery (YAPE) models.

Part 6: Troubleshooting: A critical section for technicians, listing fault codes and step-by-step diagnostic procedures.  2. Technical Features & Highlights 

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Real-World Application: Using the Manual for Common Faults

Let’s walk through a typical scenario: System reports Error P6 (Low pressure protection).

Communication Check: Most "E1" errors are caused by poor shielding or loose connections on the communication wire. Always use 2-core shielded cable. Technical Service Report: Midea VRF V4 Plus Series 1

8. Wiring & Control Logic Diagrams

Fold-out (or multi-page digital) ladder diagrams. These show the exact sequence of operation:

6. Troubleshooting with Error Codes (The Goldmine)

This is the most-thumbed section. The V4 Plus uses a 4-digit LED code on the outdoor main PCB. The manual lists over 100 error codes, such as: Part 6: Troubleshooting : A critical section for

High Efficiency: Utilizes brushless DC inverter scroll or twin rotary compressors and DC fan motors to optimize power consumption.

Extended Piping: Supports total piping lengths up to 1000m and a height difference of 110m, making it suitable for skyscrapers.