Midea MGB-F65W/RN1

174 pages

To Next Page

To Next Page

Loading...

Air-cooled modular chiller unit 50Hz MCAC-ATSM-2011-12

2

Content

1 General information ................................................................................ 3

2. Features ................................................................................................... 5

3. Specification ........................................................................................... 9

4 Dimension .............................................................................................. 21

5 Refrigeration system drawing .............................................................. 33

6. Piping diagram ...................................................................................... 36

7 Wiring diagrams..................................................................................... 42

8 Electric characteristics ......................................................................... 56

9 Capacity tables ...................................................................................... 58

10 Exploded view ...................................................................................... 74

11 Troubleshooting ................................................................................... 96

12 Installation .......................................................................................... 108

13 Commissioning .................................................................................. 132

14 Maintenance ....................................................................................... 135

15 Control system .................................................................................. 137

Appendix ................................................................................................. 174

Questions and Answers:

S
Steven HernandezSep 12, 2025
What to do if my Midea MGB-F65W/RN1 compressor can’t start?
- A
  Andrew RobinsonSep 12, 2025
  If the compressor won't start, check for a tripped overcurrent relay or burnt fuse (replace), power to the control circuit (check wiring), high or low voltage protection (refer to air suction and discharge pressure error sections), burnt contactor coils (replace), incorrect phase sequence (reconnect any two of the three phases), water system error or shorted flow-type volume controller (check water system), or error signals from the wire controller (identify and address the error).
U
usanchezAug 22, 2025
What to do if my Midea Chiller compressor stops because of motor Overload?
- J
  jennifer34Aug 22, 2025
  If the compressor stops due to motor overload, the issue might be high air expelling and suction pressure (refer to those sections), voltage problems (ensure voltage isn't 20V above or below rated), a motor short circuit (check motor resistor connections), or an overload assembly error (replace the assembly).
A
Ashley WuAug 25, 2025
What causes a Midea Chiller compressor to stop due to freeze-proof protection (Cooling operation)?
- D
  David MaddoxAug 25, 2025
  The compressor might stop due to freeze-proof protection because of insufficient chilling water flow (check/repair the pump or flow control), gas in the water loop (discharge the air), or a thermal resistor error (replace it if confirmed).
R
Regina CooperAug 26, 2025
What causes over low air suction pressure in Midea MGB-F65W/RN1 (Cooling operation)?
- M
  morrisrobertAug 27, 2025
  Low air suction pressure can occur due to several reasons: insufficient water flow (adjust flow based on temperature difference), low inlet chilled-water temperature (check installation), refrigerant leaks or insufficient refrigerant (find and repair leaks or recharge), or scaling in the evaporator (descale).
L
llarsonAug 28, 2025
Why is the air suction pressure over high in my Midea MGB-F65W/RN1 Chiller (Cooling operation)?
- E
  emily90Aug 28, 2025
  High air suction pressure in cooling mode can result from overcharged refrigerant (discharge excess) or high inlet chilled-water temperature (check water pipeline insulation).
G
george81Aug 30, 2025
Why is the air suction pressure over high in my Midea Chiller (Heating operation)?
- C
  Connor PetersonAug 30, 2025
  Excessive air suction pressure during heating can be due to overheated air at the air heat exchanger (check ambient temperature) or overcharging of refrigerant (discharge the excess).
C
Christine FuentesSep 18, 2025
What could cause abnormal noise from the compressor in my Midea Chiller?
- T
  Tiffany JohnsSep 18, 2025
  Abnormal compressor noise can be due to liquid refrigerant entering the compressor from the evaporator, causing liquid slugging (adjust refrigerant charge), or the compressor aging (replace the compressor).
M
Mr. Troy PriceSep 13, 2025
What to do if my Midea MGB-F65W/RN1 compressor stops because of integrate temperature sensor or air discharge temperature protection?
- K
  Kimberly MortonSep 14, 2025
  If the compressor stops due to the integrated temperature sensor or air discharge temperature protection, check for high or low voltage (ensure it's within 20V of the rated voltage), high air expelling pressure or low air suction pressure (refer to those sections), or a component error (check the integrated temperature sensor after the motor cools down).
L
Lisa LopezSep 10, 2025
How to fix over low air discharge pressure in Midea Chiller (Heating operation)?
- C
  Calvin GonzalezSep 10, 2025
  Low air discharge pressure during heating may be caused by low chilling water temperature (check it) or refrigerant leakage or insufficient refrigerant volume (test for leaks and recharge). If the air suction pressure is too low, see the section on “Excessive low air suction pressure”.
T
Tiffany ArellanoSep 6, 2025
How to fix over low air discharge pressure in Midea MGB-F65W/RN1 Chiller (Cooling operation)?
- M
  matthewberrySep 6, 2025
  Low air discharge pressure during cooling operation might be caused by a low surrounding temperature (measure the temperature) or a refrigerant leak or insufficient refrigerant (find the leak and recharge). If the suction pressure is low, refer to the “low suction pressure” section.

Midea MGB-F65W/RN1 Specifications

General

Brand	Midea
Model	MGB-F65W/RN1
Category	Chiller
Language	English

Summary

3 Specification

3.1 MGB-F25 WRN1 and MGB-F30 WRN1 Specifications

Provides detailed technical specifications for specific chiller models.

5 Refrigeration System Drawing

5.1 2530 KW Module Refrigeration System Sketch

5.2 556065 KW Module Refrigeration System Sketch

5.3 130 KW Module Refrigeration System Sketch

5.4 185 KW Module Refrigeration System Sketch

5.5 250 KW Module Refrigeration System Sketch

6 Piping Diagram

6.1 2530 KW Module Water Pipeline Sketch

6.2 30 KW Module Water Pipeline Sketch

6.3 556065 kw Module Water Pipeline Sketch

6.4 130 KW Module Water Pipeline Sketch

6.5 185 KW Module Water Pipeline Sketch

6.6 250 KW Module Water Pipeline Sketch

7 Wire Diagrams

7.1 Chiller Wiring Diagram

Provides electrical wiring diagrams for various chiller modules.

7.2 Networking Communication Schematic

8 Electric Characteristics

8.1 Electric Characteristics Table

9 Capacity Tables

9.1 MGB-F(D)25 WRN1 Cooling Capacity

Presents cooling capacity and power data for 25/30KW units at various temperatures.

9.2 MGB-F(D)30 WRN1 Cooling Capacity

Provides cooling capacity and power data for 30KW units at various temperatures.

9.3 MGB-F55 WRN1 Cooling Capacity

Details cooling capacity and power data for 55KW units at various temperatures.

9.4 MGB-F60 WRN1 Cooling Capacity

Lists cooling capacity and power data for 60KW units at various temperatures.

9.5 MGB-F65 WRN1, MGB-D65 WRN1 Cooling Capacity

Presents cooling capacity and power data for 65KW units at various temperatures.

9.6 MGB-F130 WRN1 Cooling Capacity

Details cooling capacity and power data for 130KW units at various temperatures.

9.7 MGB-F185 WRN1 Cooling Capacity

Shows cooling capacity and power data for 185KW units at various temperatures.

9.8 MGBT-F250 WRN1 Cooling Capacity

Lists cooling capacity and power data for 250KW units at various temperatures.

11 Troubleshooting

11.1 Failure & Protection Codes of the Module

Lists fault codes and their meanings for 25/30KW modules.

11.2 New 30 kw Module Failure & Protection Codes

Provides fault codes for new 30KW module variants.

11.3 556065 kw Module (Fixed Speed) Failure & Protection Codes

Troubleshooting codes for 55/60/65KW fixed speed units.

11.4 65 kw Digital Module Failure & Protection Codes

Lists fault codes for 65KW digital modules.

11.5 130 kw Module Failure & Protection Codes

Troubleshooting codes for 130KW modules.

11.6 185 kw Module Failure & Protection Codes

Lists fault codes for 185KW modules.

11.7 250 kw Module Failure & Protection Codes

Troubleshooting codes for 250KW modules.

11.8 Troubles and Solutions

Provides common issues and their corresponding solutions.

12 Installation

12.1 Unit Installation

Covers general installation procedures, including transportation and unit placement.

12.2 Water System Installation

Outlines procedures for connecting and maintaining the chilled water system.

12.3 Wiring Installation

Details electrical wiring procedures, precautions, and power supply specifications.

13 Commissioning

13.1 Preparation

Steps to take before starting the unit for the first time.

13.2 Test Run

Procedures for conducting an initial trial run and parameter adjustment.

14 Maintenance

14.1 Maintenance for Main Components

14.6 Refrigeration System

14.7 System Anti-Freezing

15 Control System

15.1 PCB Outline and Description

15.1.1 2530 kw Module PCB Details

15.1.3 New 30 kw Module PCB Details

15.1.5 556065 kw Module PCB Details

15.1.7 65 kw Digital Module PCB Details

15.1.9 185 kw Module PCB Details

15.1.11 250 kw Module PCB Details

15.2 Wired Controller Operation

Related product manuals

Midea MGB-F60W/RN1

Midea MGB-F30W/RN1

Midea MGB-F130W/RN1

Preview: Midea MGB Series

Midea MGB Series

Midea MGB-D65W/RN1

Midea MGB-D30W/RN1

Midea MGBT-F30W/RN1

Midea MGBT-F120W/RN1

Midea MGBT-F180W/RN1

Midea MGBT-F250W/RN1

Preview: Midea MGA-F30W/SN1

Midea MGA-F30W/SN1

Midea MGCSL-D30W/RN1