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Midea V4+R Series User Manual

Midea V4+R Series
104 pages
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Commercial Air Conditioners
Service
Manual
R410A
iOS Version Android Version
Midea CAC After-service Application
iOS Version
Midea CAC News Application
Add.: Midea Headquarters Building, 6 Midea Avenue, Shunde, Foshan, Guangdong, China
Postal code: 528311
Tel: +86-757-26338346 Fax: +86-757-22390205
cac.midea.com global.midea.com
Note: Product specifications change from time to time as product improvements and
developments are released and may vary from those in this document.
Commercial Air Conditioner Division
Midea Group

Table of Contents

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Midea V4+R Series Specifications

General IconGeneral
BrandMidea
ModelV4+R Series
CategoryAir Conditioner
LanguageEnglish

Summary

Part 1 General Information

Indoor and Outdoor Unit Capacities

Details the capacities and ranges for various indoor and heat recovery ventilator units.

External Appearance

Illustrates the physical appearance of different indoor and outdoor unit types, including MS boxes.

Outdoor Unit Combinations

Provides information on recommended combinations of outdoor units for system capacity, including branch joints.

Combination Ratio

Explains the limitations and calculation of indoor to outdoor unit capacity ratios for system design.

Part 2 Component Layout and Refrigerant Circuits

Functional Component Layout

Identifies and locates key functional components within the outdoor units, with diagrams.

Piping Diagrams

Presents schematic diagrams illustrating the refrigerant piping for different outdoor unit models.

Refrigerant Flow Diagrams

Illustrates refrigerant flow during various operating modes like cooling, heating, and defrosting.

Part 3 Control

Control Scheme Flowchart

Provides a flowchart detailing the overall control logic and activation conditions for system operations.

Stop Operation

Explains the reasons and conditions under which the system stops operation, including abnormal shutdowns.

Standby Control

Details control mechanisms for standby mode, focusing on crankcase heater operation based on temperature.

Startup Control

Describes procedures and component states during system startup for both cooling and heating modes.

Normal Operation Control

Outlines component control during normal cooling and heating operations, including compressor output and fan control.

Protection Control

Details protection mechanisms for high pressure, low pressure, discharge temperature, compressor current, and inverter modules.

Special Control

Covers specific control functions like outdoor unit duty cycling and oil return operation for system optimization.

Part 4 Field Settings

Outdoor Unit Field Settings

Explains how to set PCB switches for operational parameters like start-up time, night silent time, and static pressure.

Part 5 Diagnosis and Troubleshooting

Electric Control Box Layout

Shows the layout of components within the outdoor unit's electric control box for servicing.

Outdoor Unit Main PCB

Details ports, buttons, and components on the outdoor unit's main printed circuit board.

Error Code Table

Lists error codes, their content, and remarks for diagnosing system faults and failures.

Troubleshooting Procedures

Provides step-by-step procedures for diagnosing and resolving specific error codes and system issues.

5 Appendix to Part 5

Temperature Sensor Resistance Characteristics

Provides tables correlating temperature sensor resistance with actual temperatures for diagnostic use.

Refrigerant System Operating Parameters

Lists normal operating parameters for cooling and heating modes for system performance verification.

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