Midea MTA1-76HR Technical Manual
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Midea MTA1-76HR Technical Manual

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Midea R22 T1 side-discharge duct manual
Midea R22 T1 Side-discharge Outdoor Unit
& Duct Indoor Unit Technical Manual
Applicable Model:
Midea reserves the right to discontinue, or change specification or designs at any time without
notices and without incurring obligations.
0
Indoor unit
MTA1-76HR
MTA1-76CR
MTA1-96HR
MTA1-96CR
MCAC-UTSM-201301-01
Outdoor unit
MONB-76H
MONB-76C
MONB-96H
MONB-96C

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Vince
January 21, 2025

Ineed manual to calibrate the temperature of media thermostat because tue lower settings temperature only 20c thermostat model KJR-12B/DP(T)-E-J

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Summary of Contents for Midea MTA1-76HR

  • Page 1 & Duct Indoor Unit Technical Manual Applicable Model: Indoor unit Outdoor unit MTA1-76HR MONB-76H MTA1-76CR MONB-76C MTA1-96HR MONB-96H MTA1-96CR MONB-96C Midea reserves the right to discontinue, or change specification or designs at any time without notices and without incurring obligations.

  • Page 2: Table Of Contents

    MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual Content 1. GENERAL INFORMATION ..............3 1.1 M ......................3 EASUREMENTS 1.2 E ....................3 XTERNAL APPEARANCE 1.3 N ......................4 OMENCLATURE 2. SPECIFICATION & PERFORMANCE ..........5 2.1F ........................5 EATURES 2.2 R ....................
  • Page 3 Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01 3.9 E ....................27 LECTRIC CONNECTION 3.10 T ......................... 29 RIAL RUN 4. TROUBLE SHOOTING ..............30 4.1 P ........30 HENOMENA NOT ATTRIBUTABLE TO FAULTS OF AIR CONDITIONER 4.2 F ................ 31 AULTS OF AIR CONDITIONER AND CAUSE 4.3 F...

  • Page 4: General Information

    MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual 1. General information 1.1 Measurements Dimension Type Model Power Supply (mm, W×H×D) Indoor MTA1-76HR 1,366×450×716 220-240V~, 50Hz, 1Ph Cooling and heating 8HP Outdoor MONB-76H 1,120×1,558×400 380-415V~, 3Ph, 50Hz Indoor MTA1-76CR 1,366×450×716 220-240V~, 50Hz, 1Ph...

  • Page 5: Nomenclature

    Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01 1.3 Nomenclature Indoor unit Outdoor unit...

  • Page 6: Specification & Performance

    MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual 2. Specification & performance 2.1Features  High capacity of cooling and heating, and energy saving.  Thin size, even can installed at limited place.  All round steel shell, for high quality protection of transportation.

  • Page 7: Refrigerant Circuit

    Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01 2.2 Refrigerant circuit Compressor: R22, scroll compressor is supplied by Hitachi. Evaporator (Heat exchanger): Copper tube and aluminum fin type heat exchanger. Fan: Two axial fans adopting two speed levels. High Pressure Switch: When the discharge pressure of compressor is up to 3.3MPa or higher, the protection switch will be triggered, and if the discharge pressure is down to 2.4MPa, the protection...

  • Page 8: Unit Structure

    MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual 2.3 Unit structure...

  • Page 9: Specifications

    Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01 2.4 Specifications Model MTA1-76HR MTA1-76CR MTA1-96HR MTA1-96CR Power supply 220-240V~, 1Ph, 50Hz 220-240V~, 1Ph, 50Hz Btu/h 76,000 76,000 96,000 96,000 Capacity 22,300 22,300 28,100 28,100 Cooling Input 8,100 8,100 10,300 10,300 2.75 2.75 2.75...
  • Page 10 MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual Model MONB-76H MONB-76C MONB-96H MONB-96C Power supply 380-415V~, 3Ph, 50Hz 380-415V~, 3Ph, 50Hz Ambient temp in cooling ° C 17～43 17～43 17～43 17～43 Ambient temp in heating ° C -7~24 -7~24 Rated input...

  • Page 11: Dimension (Unit: Mm)

    Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01 2.5 Dimension (Unit: mm) Indoor unit...

  • Page 12: Service Space

    MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual Outdoor unit 2.6 Service space Indoor unit...
  • Page 13 Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01 Outdoor unit Top view of the outdoor unit (single unit installed) Top view of the outdoor unit (multiple units installed)

  • Page 14: Wiring Diagram

    Midea R22 T1 side-discharge duct manual MCAC-UTSM-201301-01 2.7 Wiring diagram MTA1-76HR, MTA1-96HR...
  • Page 15 Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01 MTA1-76CR, MTA1-96CR...
  • Page 16 Midea R22 T1 side-discharge duct manual MCAC-UTSM-201301-01 MONB-76H, MONB-96H...
  • Page 17 Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01 MONB-76C, MONB-96C...

  • Page 18: Capacity Tables

    MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual 2.8 Capacity tables Cooling: MTA1-76HR Gross Cooling Capacity (kW) Outdoor DB(° C) 29.40 35.00 Indoor WB(° C) 16.10 19.40 22.80 16.10 19.40 22.80 DB(℃) 23.90 13.0 13.7 14.3 15.1 10.0 15.8 10.5 16.6 11.1...
  • Page 19 Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01 Outdoor DB(° C) 40.60 46.10 Indoor WB(° C) 16.10 19.40 22.80 16.10 19.40 22.80 DB(° C) 23.90 11.7 12.3 12.9 13.6 14.3 15.0 10.0 26.70 12.2 12.8 13.5 10.3 14.1 10.9 14.8 11.4 15.6...
  • Page 20 MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual Cooling: MFA1-96 Gross Cooling Capacity (kW) Outdoor DB(° C) 29.40 35.00 Indoor WB(° C) 16.10 19.40 22.80 16.10 19.40 22.80 DB(° C) 23.90 16.2 10.8 17.1 11.4 17.9 11.9 18.8 12.5 19.7 13.2 20.7...
  • Page 21 Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01 Gross Cooling Capacity (kW) Outdoor DB(° C ) 40.60 46.10 Indoor WB(° C ) 16.10 19.40 22.80 16.10 19.40 22.80 DB(° C) 23.90 14.7 15.5 10.3 16.3 10.8 17.1 11.4 10.2 17.9 11.9 10.7...

  • Page 22: Electric Characteristics

    Midea R22 T1 side-discharge duct manual MCAC-UTSM-201301-01 2.9 Electric characteristics Indoor unit Power supply Model Voltage Min. Max. MTA1-76HR 220~240 4.96 MTA1-76CR 220~240 4.96 MTA1-96HR 220~240 MTA1-96CR 220~240 Notes: MCA: Min. Current Amps. (A) MFA: Max. Fuse Amps. (A) kW: Fan Motor Rated Output (kW) FLA: Full Load Amps.

  • Page 23: Sound Levels

    Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01 2.10 Sound levels Indoor units Model Noise level MTA1-76HR 55 dB(A) MTA1-76CR 55 dB(A) MTA1-96HR 55 dB(A) MTA1-96CR 55 dB(A) Outdoor units As the following picture, the nominal noise level is the maximum value between the tested value from...

  • Page 24: Static Pressure Curve

    MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual Model Noise level MONB-76H 60 dB(A) MONB-76C 60 dB(A) MONB-96H 60 dB(A) MONB-96H 60 dB(A) 2.11 Static pressure curve MTA1-76...

  • Page 25: Installation

    Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01 MTA1-96 3. Installation 3.1 Installating indoor units  As the following picture, when install the indoor unit, select the enough solid and level site with enough space for installation and maintance.  The inspection orifice should be larger than the units.
  • Page 26 MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual  Use Ф10 or bigger screws. The screw material is high-quality carbon steel whose surface is zinc plated or undergoes other anti-rust treatment, or stainless steel.  Fix the pendant bolts firmly and reliably in light of the specifice situsation.

  • Page 27: Designing And Connecting The Duct

    Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01  When in steel beam and girder structure, set and use supportive angle steel.  After install the indoor units, use a hoisting device to hoist the indoor unit, and align it with the installation screws to adjust the horizontality.
  • Page 28 MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual View of top side View of air inlet side  All pipelines must be connected closely and soundly without leak of air. The pipelines must be adiabatic and free from condensation. The key points of duct connection are as following picture.

  • Page 29: Installing Outdoor Units

    Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01 3.3 Installing outdoor units  When installing the unit, leave a space for installation and maintenance shown in the following figure. Install the power supply at the right side of the outdoor unit.
  • Page 30 MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual  1 unit should be fixed 4 screws which match with M12 foundation bolts.  The distance of the foundation bolt is shown in following figure.  Snow protection facilities must be installed in the snowfall areas. If the snow protection facilities are incomplete, faults may occur.

  • Page 31: Connecting Refrigerant Pipe

    Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01 3.4 Connecting refrigerant pipe  Size of the outdoor unit pipes. Model Gas side (mm) Liquid side (mm) Ф9.52 Ф19.0 MONB-76H Ф9.52 Ф19.0 MONB-76C Ф9.52 Ф19.0 MONB-96H Ф9.52 Ф19.0 MONB-96C  Allowed length of refrigerant pipe and height difference.
  • Page 32 MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual  Schematic diagram of connection between indoor unit and outdoor unit.  The indoor unit and outdoor unita are categorized int system A and system B. When installing and connecting the indoor unit and outdoor unit, identify the label carefully , and make sure that indoor unit corresponds to the outdoor unit exactly.

  • Page 33: Vacuum

    Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01  Insert a flare nut into the pipe and flare the pipe. Outside Diameter A (mm) (mm) Max. Min. Ф9.52 12.4 12.0 Ф19.1 23.3 22.9  Put the connecting tubing at the proper position, wrench the nuts with hands, then fasten it with a wrench.
  • Page 34 MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual Expel air by refrigerant  Use the refrigerant in the outdoor unit to expel air.  Screw up the pipe nuts at A, B, C and D completely.  Loosen and remove the square-head cover of valves A and B, and rotate the square-head spool of valve B counterclockwise for 45 degrees.

  • Page 35: Refrigerant Replenishment Quantity

    Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01  Use a vacuum pump to expel the air.  Loosen and remove the maintenance orifice nut of valve A, and connect the filter hose of the manifold valve to the maintenance orifice of valve A. (Tighten both valve A and valve ...

  • Page 36: Leak Detection And Heat Insulation

    MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual 3.7 Leak detection and Heat insulation  Use soap water or a leak detector to check whether gas leakage exists at the adapers.  Density threshold: Density of the Freon gas that does not harm the human body. Density threshold of R22: 0.3kg/m...

  • Page 37: Install The Drain Pipe

    Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01  Imperfect heat insulation may lead to condensate drips. 3.8 Install the drain pipe  In order to prevent faults caused by condensate of the refrigerant pipe and drain pipe, perform condensate prevention and heat insulation properly.

  • Page 38: Electric Connection

    MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual bushes to preserve heat of the drain pipe. Ohterwise, condensate will occur. 3.9 Electric connection  Use special power supply for the air conditioner. Design power supplies specific to the indoor unit and outdoor unit. The supply voltage must comply with the nominal voltage.
  • Page 39 Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01  Cooling and heating units electric wire diagram  Cooling only units electric wire diagram  Pay attention to the phase sequence of the power supply. If the phase sequence is reversed, the compressor will not start.

  • Page 40: Trial Run

    MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual 3.10 Trial run  Perform the trial run only after the outdoor unit has been powered on for over 12 hours.  Check that all valves should be opened before trial run. ...

  • Page 41: Trouble Shooting

    Midea R22 T1 side-discharge duct manual MCAC-UTSM-201301-01 4. Trouble shooting 4.1 Phenomena not attributable to faults of air conditioner  The system does not run.  After pressing the ON/OFF button, the system does not run immediately.  If the Run indicator is on, it indicates the air conditioner runs in the normal status.

  • Page 42: Faults Of Air Conditioner And Cause

    MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual  Shift from cooling mode to air supply mode.  In order to prevent frosting of the indoor heat exchanger, the air conditioner shifts to air supply mode automatically, and resumes to cooling mode in a short time.

  • Page 43: Faults Of Remote Controller And Cause

    Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01 Symptom Possible causes Way of handing The condenser or evaporator is Clean the heat-exchanger. too dirty. The filter is blocked. Clean the filter. The intake orifice or exhaust Remove foreign mattes to keep well orifice of the indoor and outdoor ventilated.
  • Page 44 MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual  The transmitting symbol does not blink. Symptom Check item Cause Pressing ON/OFF button, the remote Check whether the batteries of When the batteries are exhausted, the controller signal remote controller are low.

  • Page 45: Indoor Unit Malfunction And Protection Codes

    Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01 4.4 Indoor unit malfunction and protection codes  Names of indicators in receiving kit Display content Fault or protection meaning All lamps Lack of neutral line. flashing at 5Hz Timer lamp T1, room temperature sensor, fault of open circuit, short circuit.
  • Page 46 MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual Timer lamp flashing at 5Hz, Operation lamp flashing at 5Hz Defrosting lamp flashing at 5Hz For these series products, if the condenser temperature sensor malfunction is displayed, it is enough to check whether wiring has problem. If the wiring is correct, the PCB should be replaced.

  • Page 47: Outdoor Unit Malfunction And Protection Codes

    Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01 4.5 Outdoor unit malfunction and protection codes Type LED1 LED2 Remarks ● ● Phase sequence or lack of phase. Manual reset. ☆5 ☆5 Ambient temperature sensor error. Auto reset, after eliminate error. ☆1 High temperature protection of Auto reset, after eliminate error.
  • Page 48 MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual Ambient temperature sensor error, Condenser temperature sensor error High temperature protection of condenser...

  • Page 49: Midea R22 T1 Side-Discharge Duct Manual Mcac-Rtsm

    Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01 System high pressure protection...
  • Page 50 MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual Discharge temperature protection...
  • Page 51 Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01 System low pressure protection Current overload protection...

  • Page 52: Maintenance

    MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual 5. Maintenance  Only the professionals can perform repair. Before maintain the unit, turn off the main power switch.  Do not use water or air with a temperature higher than 50° C to clean the filter or panel.
  • Page 53 Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01 For convenient repairing and maintenance, the reserved inspection orifice should larger than the base of the indoor unit and the connecting duct is detachable. When remove the base of air conditioner and the fan motor assembly which are very heavy, it is necessary that two persons do it together.
  • Page 54 MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual  Once the hole on the fan clapboard is higher than the pin on the front board, move the assembly to make the pin through the hole.  One person supports the bottom of fan motor assembly; another one fixes the M8 screws to make the fan motor assembly fixed on the front board.

  • Page 55: Exploded View

    Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01 6. Exploded view MTA1-76HR...
  • Page 56 MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual Part Name BOM code Part Name BOM code Main control board Top cover ass'y 201270900020 15.3 201370900071 assembly Lower flange, return air 201270900016 15.4 Transformer 202300900093 inlet Evaporator right seal plate 201270900015 15.5...
  • Page 57 Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01 MONB-76H...
  • Page 58 MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual Part Name BOM code Part Name BOM code High pressure valve ass'y of Cover 201248900022 201648900066 system B Middle plate ass'y 201248900036 11.1 High pressure valve 201600780304 High pressure valve Side plate ass'y of rear 201248900008 11.2...
  • Page 59 Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01 MTA1-96HR...
  • Page 60 MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual Part Name BOM code Part Name BOM code Top cover ass'y 201270900020 15.3 Relay 202300800003 Lower flange, return air 201270900016 15.4 Transformer 202300900093 inlet Evaporator right seal plate 201270900015 15.5 Wire joint, 7p...
  • Page 61 Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01 MONB-96H...
  • Page 62 MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual Part Name BOM code Part Name BOM code Cover 201248900022 11.1 High pressure valve 201600780304 High pressure valve Middle plate ass'y 201248900023 11.2 201648900067 connector, system B High pressure valve Side plate ass'y of rear...
  • Page 63 Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01 MTA1-76CR...
  • Page 64 MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual Part Name BOM code Part Name BOM code Main control board Top cover ass'y 201270900020 15.3 201370900071 assembly Lower flange, return air inlet 201270900016 15.4 Transformer 202300900093 Evaporator right seal plate 201270900015 15.5...
  • Page 65 Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01 MONB-76C...
  • Page 66 MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual Part Name BOM code Part Name BOM code High pressure valve ass'y, Cover 201248900022 201648900066 system B Bracket ass'y, net 201295100579 Side plate ass'y of rear 201248900008 Cover ass'y, E-box 201295100612 Valve plate...
  • Page 67 Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01 MTA1-96CR...
  • Page 68 MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual Part Name BOM code Part Name BOM code Top cover ass'y 201270900020 15.3 Relay 202300800003 Lower flange, return air inlet 201270900016 15.4 Transformer 202300900093 Evaporator right seal plate 201270900015 15.5 Wire joint, 7p...
  • Page 69 Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01 MONB-96C...
  • Page 70 MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual Part Name BOM code Part Name BOM code High pressure valve ass'y, Cover 201248900022 201648900066 system B Bracket ass'y, net 201295100579 Side plate ass'y of rear 201248900008 Cover ass'y, E-box 201295100612 Valve plate...

  • Page 71: Accessories

    Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01 7. Accessories Accessory name Quantity Notes Owner’s manual Installation manual Throttling assemble For refrigerant system installation. Water connective pipe Connect to water drainage pipe. Display board subassembly Connect to receiving panel. Protective sleeve For refrigerant inlet and outlet pipes.

  • Page 72: Introduction Of Function Buttons On The Remote Controller

    MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual 8.2 Introduction of function buttons on the remote controller Notes: This illustration is for explanation purposes only. The actual shape or button names of the remote controller may be slightly different. ① TEMP Button: Push the TEMP button to decrease the indoor temperature setting or to adjust the TIMER in a counter-clockwise direction.

  • Page 73: Names And Functions Of Indicators On Remote Controller

    Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01 off the operation). ⑨ ON/OFF Button: Push this button to start the unit operation. Push the button again to stop the unit operation. ⑩ FAN SPEED Button: This button is used for setting Fan Speed in the sequence that goes from AUTO, LOW, MED to HIGH, then back to AUTO.

  • Page 74: Operating The Remote Controller

    MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual display. ④ TIMER Display: This display area shows the settings of TIMER. That is, if only the starting time of operation is set, it will display the TIMER ON. If only the turning off time of operation is set, it will display the TIMER OFF.
  • Page 75 Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01 on the display panel of the indoor unit starts flashing. ※ Use the MODE select button to select AUTO. In the multi system, to avoid mode conflict; auto-mode is taken as cool mode.
  • Page 76 MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual ※ Push the TEMP button to set the desired temperature from 21 to 28 ° C ° C ※ Push the ON/OFF button. The operation lamp lights and the air conditioner start to operate in the DRY mode.
  • Page 77 Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01 temperature will re-appear on the digital display. c. Set the STARTING & STOPPING time ※ Press the CANCEL button to cancel any former settings. ※ Push the TIMER button and the remote controller will show the last set time for START operation and the signal "h"...

  • Page 78: Wired Controller: Kjr-10B (Optional)

    MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual 9. Wired Controller: KJR-10B (Optional) KJR-10B/DP(T)-E 9.1 Remote controller specifications Model KJR-10B/DB(T)-E Power Supply Voltage 5.0V DC Ambient Temperature Range -15° C～43° C Ambient Humidity Range RH40%~RH90% Performance Features 1. Operating mode: Cool, heat, dry, fan and auto.

  • Page 79: Introduction Of Function Buttons On The Wired Controller

    Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01 9.2 Introduction of function buttons on the wired controller ① MODE button: It is used to select mode, push the button one time, then the operation modes will change in turn as follows: Note: No heating mode if wired controller is set as the cooling only.
  • Page 80 MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual ⑦ ON/OFF button: Push the button at the condition of off, the OPERATION lamp lights, and the wired controller enter in to on operation, simultaneously sends the information of operation mode set currently, temperature, fan speed, timer, etc. Push the button at the condition of on, the OPERATION lamp extinguishes, simultaneously sends the off.

  • Page 81: Names And Functions Of Indicators On Wired Controller

    Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01 9.3 Names and functions of indicators on wired controller ① Mode Display: Press MODE button can select ‘AUTO’, COOL’, ‘DRY’, ‘HEAT’ and ‘FAN’ mode. Note: HEAT is invalid for cooling only wired controller.

  • Page 82: Operating The Wired Controller

    MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual 9.4 Operating the wired controller AUTO Operation ※ Insert the power supply of indoor unit, and operation lamp of indoor unit will flash. ※ Push MODE to select AUTO. ※ Set the desired temperature by pushing the TEMP ▲ and TEMP ▼ , usually the temperature range is set from 17°...
  • Page 83 Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01 ※ Push the ON/OFF, the operation lamp of indoor unit lights, and the air conditioner will start to dehumidify. ※ Press the ON/OFF again, stop the air conditioner. Notes: The FAN SPEED and ECONOMICAL buttons are invalid in the dry mode.
  • Page 84 MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual ※ 0.5 seconds later, after finishing the adjustment, the wired controller sends the information of timer, the timer off and timer on setting are completed. Cancel the Timer Setting ※ Push the TIME ON and TIME OFF, OK once more.

  • Page 85: Wired Controller Installation

    Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01 10) Query for Initialization Function Parameters After setting the initialization function, use the following method for query: ※ Long press FAN SPEED for 2 seconds to enter into the query interface. ※ After enter to the interface, the LCD temperature display area, minute display area will display a series of numbers, which is the current initialization parameter value.
  • Page 86 MCAC-RTSM-201301-01 Midea R22 T1 side-discharge duct manual  Assemblies on the installation site Quantity Name Remarks Embedded Embedded into wall onto wall Take 0.05mm ×5 cable below 5-core shielded cable 15m length. Switch box Wiring Tube (Insulating sleeve and tightening screw) ...
  • Page 87 Midea R22 T1 side-discharge duct manual MCAC-RTSM-201301-01 ※ Fix the back cover on the wall or switch box according to the following picture. When installing the wired controller cover, be sure to reserve a hole in the wall to avoid the wired controller back cover being fixed directly to the wall which is not allowed for wire joint extrudes out of the wired controller back cover.

This manual is also suitable for:

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