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Midea MGA-F30W/SN1 - User Manual

Midea MGA-F30W/SN1
72 pages
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MCAC-2008-11 Air-cooled Modular Chiller
1
Contents
1. Nomenclature…………..………………………………………………...
2. Product Schedule………………………………………………………..
3. Features…………………………………………………………………...
4. Specification……………………………………………………………...
5. Dimension…………………………………………………………………
6. Piping Diagrams & Pipe Connection Drawing……………………...
7. Wiring Diagrams……………………….………………………………..
8. Electric Characteristics…………………………………………….......
9. Capacity Tables…………………………………………………………
10. Exploded View………………………………………………………….
11. Troubleshooting……………..…………………………………………
12. Installation……………………………..………………………………..
13. Debugging...…………………………..………………………………
14. Maintenance…..…………………………..……………………………
15. Control……………………………..…………………………………….
※ Manufacture reserves the right to discontinue, or change at any time, specifications or designs without
notices and without incurring obligations.

Table of Contents

Questions and Answers

  • P
    Phillip JonesAug 14, 2025
    Why is the discharge pressure high on my Midea MGA-F30W/SN1 Chiller (cooling mode)?
    • B
      Brian ColemanAug 14, 2025
      High discharge pressure in a Midea Chiller during cooling can occur if air or another gas enters the system. To resolve this, discharge the gas from the refrigerant charging hole and re-vacuum if necessary. It can also happen if the fins are dirty or blocked; in this case, splash the fins of the condenser. Finally, check the condenser motor and repair it if it's faulty, because insufficient condenser wind flow or motor failure can also cause high discharge pressure.
  • A
    Andrea HillAug 18, 2025
    How to fix abnormal noise from Midea MGA-F30W/SN1 compressor?
    • P
      Priscilla HartAug 18, 2025
      Abnormal noise from the compressor in your Midea Chiller can be caused by compressor liquid pumping due to liquid refrigerant entering. Adjust the refrigerant volume and inspect the expansion valve and suction gas degree of superheat to solve this.
  • W
    wilsonbrentAug 21, 2025
    What causes low suction pressure in Midea MGA-F30W/SN1 Chiller (cooling) and how to fix it?
    • K
      Kevin PerezAug 21, 2025
      Low suction pressure in a Midea Chiller (cooling mode) can be due to insufficient water flow. To address this, measure the temperature difference between the inlet and outlet water and adjust the water flow accordingly. It can also be caused by a refrigerant leak or insufficient refrigerant, in which case you should perform leak-hunting and recharge the system.
  • D
    Donald FowlerAug 25, 2025
    What causes high discharge pressure in Midea MGA-F30W/SN1 (heating mode)?
    • B
      Bill BrownAug 26, 2025
      High discharge pressure in a Midea Chiller during heating can occur if air or another gas enters the system. To fix this, discharge the gas from the refrigerant charging hole, re-vacuuming if needed. Also, scaling in the waterside heat exchanger can cause this issue, so descaling is required.
  • S
    Sarah HansonAug 28, 2025
    Why is the suction pressure high on my Midea MGA-F30W/SN1 Chiller (cooling mode)?
    • P
      Patrick CarterAug 28, 2025
      High suction pressure in a Midea Chiller (cooling mode) is often due to the system being overcharged with refrigerant. To resolve this, discharge the excess refrigerant.
  • T
    Terri MooreAug 31, 2025
    What to do if Midea Chiller compressor stops due to anti-freeze protection (Cooling)?
    • S
      Sarah MitchellAug 31, 2025
      If the compressor in your Midea Chiller stops due to anti-freeze protection during cooling, it could be due to insufficient chilled water. This can be caused by a failure of the water pump or water flow switch. Maintain or replace these components as necessary.
  • R
    Robert BowenSep 3, 2025
    What causes low discharge pressure in Midea Chiller (cooling mode)?
    • C
      Christina TaylorSep 3, 2025
      Low discharge pressure in a Midea Chiller during cooling may indicate a refrigerant leak or insufficient refrigerant. Conduct leak-hunting procedures and recharge the system as necessary.
  • J
    Jonathan LopezSep 7, 2025
    What causes low discharge pressure in Midea Chiller (heating mode)?
    • S
      seangraySep 7, 2025
      Low discharge pressure in a Midea Chiller during heating may be due to a refrigerant leak or insufficient refrigerant. You should perform leak-hunting and recharge the system.
  • H
    Henry EatonSep 10, 2025
    Why does the Midea MGA-F30W/SN1 Chiller compressor stop due to low-pressure protection?
    • R
      Rebekah GibsonSep 12, 2025
      If the compressor stops in your Midea Chiller due to low-pressure protection, it may be because the filter before or after the electric expansion valve is blocked. Replace the filter to resolve this issue.

Summary

1. Nomenclature

2. Product Schedule

3. Features

4. Specification

5. Dimension

5.1 30 kW modular outline

Shows dimensional drawings for 30kW units.

5.2 65 kW modular outline

Shows dimensional drawings for 65kW units.

6. Piping Diagrams & Pipe Connection Drawing

6.1 Refrigeration system sketch drawing for 30 kW module unit

Illustrates the refrigeration flow for 30kW units.

6.2 Refrigeration system sketch drawing for 65 kW

Explains refrigeration flow for 65kW units based on 30kW.

6.3 Water pipe sketch drawing for 30 kW module unit system

Shows the water piping layout for 30kW systems.

6.4 Water pipe sketch drawing for 65 kW module unit system

Illustrates the water piping for 65kW systems.

6.5 Sketch drawing of units combination system(30 kW, 65 kW)

Depicts how multiple units are combined in a system.

6.6 Sketch drawing of auxiliary electric heater installation

Shows the installation diagram for auxiliary heaters.

7. Wiring Diagrams

7.1 Outdoor wiring diagram: MGA-F(D)30 W;SN1 & MGA-F(D)65 W;SN1 module for main unit

Provides the main outdoor wiring schematic for 30kW/65kW units.

7.2 Outdoor wiring diagram: MGA-F(D)30 W;SN1 & MGA-F(D)65 W;SN1 module for auxiliary unit

Details the outdoor wiring for auxiliary units.

8. Electric Characteristics

9. Capacity Tables

9.1 Cooling

Presents cooling capacity data under various conditions.

9.2 Heating

Provides heating capacity data under various conditions.

10. Exploded View

10.1 MGA-F30 W;SN1

Shows an exploded view and part numbers for the MGA-F30W/SN1 model.

10.2 MGA-F65 W;SN1

Displays an exploded view and part numbers for the MGA-F65W/SN1 model.

10.3 MGA-D30 W;SN1

Presents an exploded view and part numbers for the MGA-D30W/SN1 model.

10.4 MGA-D65 W;SN1

Shows an exploded view and part numbers for the MGA-D65W/SN1 model.

11. Troubleshooting

11.1 Failure & Protection Codes of the Module

Lists error codes and their corresponding module troubles.

11.2 Troubles and Solutions

Details common problems and their resolution steps.

12. Installation

12.1 Unit Installation

Covers the general process of installing the unit.

12.2 Water System Installation

Details the procedures for installing water pipelines and systems.

12.3 Wiring Installation

Outlines the procedures for installing electrical wiring.

13. Testing

1. Preparation

Steps to prepare the unit before testing.

2. Testing

Procedures for conducting system tests.

14. Maintenance

Maintenance for main components

Focuses on maintaining key components.

Descaling

Process for removing mineral deposits from heat exchangers.

Turn off the unit in winter

Instructions for winter shutdown procedures.

First start after the unit stops

Steps for restarting after a long period of inactivity.

Accessory replacement

Guidance on using genuine replacement parts.

Refrigeration system

Procedures for checking and handling refrigerant.

15. Control System

15.1 PCB Outline and Description

Details the PCB layout and component descriptions.

15.2 Failure & Protection Codes of the Module

Lists error codes and their corresponding module protections.

15.3 Controllers

Details the operation of wired and touch screen controllers.

Midea MGA-F30W/SN1 Specifications

General IconGeneral
BrandMidea
ModelMGA-F30W/SN1
CategoryChiller
LanguageEnglish

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