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Midea MSG-07CRN2 User Manual

Midea MSG-07CRN2
50 pages
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Service manual
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13. Characteristic of temperature sensor
Temp. Resistance K Temp. Resistance K Temp. Resistance K
-10 62.2756 17 14.6181 44 4.3874
-9 58.7079 18 13.918 45 4.2126
-8 56.3694 19 13.2631 46 4.0459
-7 52.2438 20 12.6431 47 3.8867
-6 49.3161 21 12.0561 48 3.7348
-5 46.5725 22 11.5 49 3.5896
-4 44 23 10.9731 50 3.451
-3 41.5878 24 10.4736 51 3.3185
-2 39.8239 25 10 52 3.1918
-1 37.1988 26 9.5507 53 3.0707
0 35.2024 27 9.1245 54 2.959
1 33.3269 28 8.7198 55 2.8442
2 31.5635 29 8.3357 56 2.7382
3 29.9058 30 7.9708 57 2.6368
4 28.3459 31 7.6241 58 2.5397
5 26.8778 32 7.2946 59 2.4468
6 25.4954 33 6.9814 60 2.3577
7 24.1932 34 6.6835 61 2.2725
8 22.5662 35 6.4002 62 2.1907
9 21.8094 36 6.1306 63 2.1124
10 20.7184 37 5.8736 64 2.0373
11 19.6891 38 5.6296 65 1.9653
12 18.7177 39 5.3969 66 1.8963
13 17.8005 40 5.1752 67 1.83
14 16.9341 41 4.9639 68 1.7665
15 16.1156 42 4.7625 69 1.7055
16 15.3418 43 4.5705 70 1.6469
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Midea MSG-07CRN2 Specifications

General IconGeneral
BrandMidea
ModelMSG-07CRN2
CategoryAir Conditioner
LanguageEnglish

Summary

Precaution

Safety Precaution

General safety instructions to prevent injury and property damage during operation and installation.

Warning

Important warnings regarding installation and usage to prevent hazards like fire or electric shock.

CAUTION

Important cautions regarding refrigerant leakage, installation, and maintenance procedures.

Function

Indoor unit functions

Details the functions and controls of the indoor unit, including operation modes and indicators.

Outdoor unit functions

Details the functions and features of the outdoor unit, such as protection and special kits.

Dimension

Indoor unit

Provides dimensional data for the indoor unit with a table of measurements.

Outdoor unit

Provides dimensional data for the outdoor unit with a table of measurements.

Specification

Model Specifications (MSG-07CRN2, MSG-07HRN2, MSG-09CRN2)

Technical specifications including power, capacity, and components for models MSG-07CRN2, MSG-07HRN2, MSG-09CRN2.

Model Specifications (MSG-09HRN2, MSG-12CRN2, MSG-12HRN2)

Technical specifications including power, capacity, and components for models MSG-09HRN2, MSG-12CRN2, MSG-12HRN2.

Model Specifications (MSG-16CRN2, MSG-16HRN2, MSG-18CRN2)

Technical specifications including power, capacity, and components for models MSG-16CRN2, MSG-16HRN2, MSG-18CRN2.

Model Specifications (MSG-18HRN2, MSG-21CRN2, MSG-21HRN2)

Technical specifications including power, capacity, and components for models MSG-18HRN2, MSG-21CRN2, MSG-21HRN2.

Refrigerant cycle diagram

Cooling only

Diagram illustrating the refrigerant flow for cooling operation only.

Heat pump mode

Diagram illustrating the refrigerant flow for heat pump operation.

Operation limits

Cooling operation

Chart showing operating limits for cooling based on outdoor and indoor temperatures.

Heating operation

Chart showing operating limits for heating based on outdoor and indoor temperatures.

Schematic diagram and Wiring diagram

Schematic diagram

Electrical schematic of the unit's internal circuits, showing component connections.

Wiring diagram (MSG-07CR, MSG-09CR, MSG-12CR)

Wiring diagram for cooling mode, models MSG-07CR, MSG-09CR, MSG-12CR.

Wiring diagram (MSG-16CR)

Wiring diagram specific to the MSG-16CR model.

Wiring diagram (MSG-18CR, MSG-21CR)

Wiring diagram for models MSG-18CR and MSG-21CR.

Wiring diagram (MSG-07HR, MSG-09HR, MSG-12HR)

Wiring diagram for models MSG-07HR, MSG-09HR, MSG-12HR.

Wiring diagram (MSG-16HR, MSG-18HR, MSG-21HR)

Wiring diagram for models MSG-16HR, MSG-18HR, MSG-21HR.

Installation details

Wrench torque sheet for installation

Specifies torque values for installation fittings based on pipe diameter.

Connecting the cables

Guidelines for selecting and connecting power cords based on unit capacity.

Pipe length and the elevation

Details on maximum pipe length and elevation differences and refrigerant addition.

Air purging of the piping and indoor unit

Procedure for removing air from the refrigeration piping to ensure proper function.

Pumping down (Re-installation)

Procedure for recovering refrigerant during re-installation to prevent loss.

Re-air purging (Re-installation)

Process for purging air from the system after re-installation.

Balance refrigerant of the 2-way, 3-way valves

Procedure for balancing refrigerant levels in the system.

Evacuation

Method for creating a vacuum in the refrigerant system to remove moisture and air.

Gas charging

Steps for adding the correct amount of refrigerant to the system.

Capacity table

MSG-07CRN2

Cooling and heating capacity data for model MSG-07CRN2.

MSG-07HRN2

Cooling and heating capacity data for model MSG-07HRN2.

MSG-09CRN2

Cooling and heating capacity data for model MSG-09CRN2.

MSG-09HRN2

Cooling and heating capacity data for model MSG-09HRN2.

MSG-12CRN2

Cooling and heating capacity data for model MSG-12CRN2.

MSG-12HRN2

Cooling and heating capacity data for model MSG-12HRN2.

MSG-16CRN2

Cooling and heating capacity data for model MSG-16CRN2.

MSG-16HRN2

Cooling and heating capacity data for model MSG-16HRN2.

MSG-18CRN2

Cooling and heating capacity data for model MSG-18CRN2.

MSG-18HRN2

Cooling and heating capacity data for model MSG-18HRN2.

MSG-21CRN2

Cooling and heating capacity data for model MSG-21CRN2.

MSG-21HRN2

Cooling and heating capacity data for model MSG-21HRN2.

Electronic function

Electronic control working environment

Specifies operating conditions for electronic controls, including voltage and temperature.

Proper symbols and their meaning

Explains symbols used in electronic functions and controls for clarity.

Function

Lists and describes various operational functions of the unit, such as remote receiving and timers.

Protection

Details the various protection mechanisms of the unit, like compressor restart delay and sensor protection.

Fan-only mode

Describes the operation when only the fan is active, with speed settings.

Cooling mode

Explains the cooling operation mode and the function of the 4-way valve.

Dehumidifying mode

Details the dehumidification operation, including 4-way valve status and fan actions.

Heating mode

Explains the heating operation mode, including 4-way valve and fan actions.

Heating mode functions

Describes heating mode operations including fan control and anti-cold wind.

Auto wind at heating mode

Explains automatic fan speed control in heating mode based on temperature.

Indoor evaporator high-temperature protection at heating mode

Details protection against high evaporator temperatures in heating mode.

Defrosting mode(available for heating mode)

Describes the defrosting function during heating, including conditions and timing.

Auto mode

Explains automatic mode selection based on temperature differences.

Force cooling function

Describes how to activate a forced cooling operation for quick cooling.

Sleep mode

Details the sleep mode function for energy saving, with temperature adjustments.

Sleep mode Auto function

Explains automatic temperature adjustment in sleep mode for cooling, heating, and auto.

Auto restart function

Explains automatic restart after power failure, restoring previous settings.

Anion (optional)

Describes the optional anion function, which starts with the indoor fan.

Model and Parameters

Model Specific Parameters

Lists key parameters like current ratings and temperature protection points for various models.

Troubleshooting

Display board

Explains the indicators on the display board and their meanings.

Troubleshooting

Table correlating failure phenomena with indicator status for cooling and heat pump modes.

Diagnostic chart

Flowchart for diagnosing operational problems related to power and PCB.

Resetting phenomenon often occurs during operation

Addresses issues with the unit resetting during operation due to voltage instability.

Operation lamp flashes and Timer lamp off

Troubleshooting for specific lamp status combinations indicating a fault.

Operation lamp flashes and Timer lamp on

Troubleshooting for specific lamp status combinations indicating a fault.

Operation lamp off and Timer lamp flashes

Troubleshooting for specific lamp status combinations indicating a fault.

Operation lamp on and Timer lamp flashes

Troubleshooting for specific lamp status combinations indicating a fault.

Operation lamp flashes, Timer lamp flashes

Troubleshooting for specific lamp status combinations related to zero-signal errors.

Characteristic of temperature sensor

Temperature Sensor Resistance Chart

Table showing resistance values of temperature sensors at various temperatures.

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