Midea MGCSL-F30W/RN1

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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:

J
Jaclyn GriffinSep 12, 2025
What to do if my Midea MGCSL-F30W/RN1 compressor can’t start?
- J
  John DavisSep 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).
J
Jason BaldwinAug 22, 2025
What to do if my Midea MGCSL-F30W/RN1 compressor stops because of motor Overload?
- C
  Carlos TorresAug 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).
M
Mary ReedAug 25, 2025
What causes a Midea MGCSL-F30W/RN1 compressor to stop due to freeze-proof protection (Cooling operation)?
- S
  Steven GarciaAug 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).
C
Christopher DayAug 27, 2025
What causes over low air suction pressure in Midea MGCSL-F30W/RN1 Chiller (Cooling operation)?
- J
  joseph94Aug 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).
K
kcastilloAug 28, 2025
Why is the air suction pressure over high in my Midea MGCSL-F30W/RN1 Chiller (Cooling operation)?
- A
  andrewkleinAug 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
gina87Aug 29, 2025
Why is the air suction pressure over high in my Midea Chiller (Heating operation)?
- N
  nancyjohnsonAug 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 PriceSep 18, 2025
What could cause abnormal noise from the compressor in my Midea MGCSL-F30W/RN1?
- C
  Colin KennedySep 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).
V
Victoria RobertsonSep 14, 2025
What to do if my Midea Chiller compressor stops because of integrate temperature sensor or air discharge temperature protection?
- L
  larryhughesSep 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).
T
Tracey HarrisSep 10, 2025
How to fix over low air discharge pressure in Midea MGCSL-F30W/RN1 Chiller (Heating operation)?
- N
  Nancy DavisSep 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”.
M
Michelle GarciaSep 6, 2025
How to fix over low air discharge pressure in Midea MGCSL-F30W/RN1 (Cooling operation)?
- J
  Jamie GuzmanSep 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 MGCSL-F30W/RN1 Specifications

General

Brand	Midea
Model	MGCSL-F30W/RN1
Category	Chiller
Language	English

Summary

Features

Operational Range and Features

Details low ambient cooling, wide outlet water temp, and hydraulic module.

Control and Modularity

Specification

General Specifications

Overviews electrical, mechanical, and performance parameters for chiller units.

Model-Specific Specifications

Wiring Diagrams

Chiller Wiring Diagrams by Module Size

Electrical wiring diagrams for various chiller module capacities.

Networking Communication Schematics by Module Size

Communication wiring for networked chiller systems across different module sizes.

Electric Characteristics

Electrical Characteristics Table

Details electrical properties like voltage, current, and power for various models.

Troubleshooting

Failure & Protection Codes by Module Type

Lists fault and protection codes for various chiller module types.

General Troubles and Solutions

Provides common troubleshooting steps and solutions for chiller system issues.

Installation

Unit Installation Procedures

Covers transportation, space, foundation, damping, and basic wiring precautions.

Water System Installation

Details pipeline, water quality, flow, tank, pump, and expansion tank installation.

Electrical Wiring and Connections

Covers power supply, wiring requirements, steps, and diagrams.

Commissioning

Preparation Steps

Outlines the necessary steps before starting the commissioning process.

Test Run Procedures

Details the procedure for conducting a trial run and performance checks.

Maintenance

General Maintenance and Component Care

Covers routine maintenance, scale removal, and replacement procedures.

Control System

Module PCB Layouts and Component Details

Visual guides and descriptions of PCBs and components for various chiller modules.

Wired Controller Operation and Installation

Covers wired controller functions, setup, and installation procedures.

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