Midea MKG-250A Technical & Service Manual
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Midea MKG-250A Technical & Service Manual

Midea MKG-250A Technical & Service Manual

50hz ac fan coil unit 2-pipe wall-mounted series
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Midea 50Hz AC Fan Coil Unit
2-Pipe Wall-mounted Series
Technical Service Manual(EU)
Midea reserves the right to discontinue, or change specification or designs at any time without notices and without incurring
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Summary of Contents for Midea MKG-250A

  • Page 1 Midea 50Hz AC Fan Coil Unit 2-Pipe Wall-mounted Series Technical Service Manual(EU) 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

    Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 Content 1.INTRODUCTION ................2 2.NOMENCLATURE................ 2 3.PRODUCT SCHEDULE ............... 2 4.EXTERNAL APPEARANCE ............3 5.FEATURE ..................3 6.SPECIFICATIONS ................ 5 7.DIMENSIONS ................9 8.SERVICE SPACES ..............10 9.WIRING DIAGRAMS ..............11 10.CAPACITY TABLES ..............

  • Page 3: Introduction

    Midea MKG series fan coil unit has been tested by national AC quality supervise testing center, as low noise level, high efficiency, stable operation and low power consumption make it as the advanced production in the world,. Due to their reduced dimensions and pleasing design, these units are ideally suited for Commercial and Residential environments.

  • Page 4: External Appearance

    Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 4. External Appearance C panel S panel 5. Feature  Multi-connection outlet pipe method: left/right/rear, more flexible for installation. Left piping Left back piping Right piping Right back piping ...
  • Page 5 MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series Horizontal air deflector  Built-in 3-way electromagnetic valve. Cross flow fan creates quiet and comfortable environment.   Easy maintenance has been realized as the front panel can be removed for easy access.

  • Page 6: Specifications

    Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 6. Specifications Model MKG- 250A 300A 400A H/M/L 435/396/342 523/426/351 660/534/480 Air flow H/M/L 256/233/201 308/251/206 388/314/282 Capacity H/M/L 1.94/1.84/1.68 2.64/2.4/1.99 2.94/2.58/2.34 Cooling Water flow rate H/M/L 0.35/0.33/0.3 0.47/0.43/0.36 0.53/0.46/0.42...
  • Page 7 MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series Specifications Model MKG- 500A 600A H/M/L 841/723/594 915/836/714 Air flow H/M/L 495/425/349 538/492/420 Capacity H/M/L 4.01/3.61/3.1 4.61/4.33/3.84 Cooling Water flow rate H/M/L 0.72/0.65/0.56 0.83/0.78/0.69 Water pressure drop H/M/L 47.1/33.5/29.7 51/39.5/34...
  • Page 8 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 Specifications Model MKG- 250-BA 300-BA 400-BA Power supply V/Ph/Hz 220-240/1/50 435/396/342 523/426/351 660/534/480 Air flow (H/M/L) 256/233/201 308/251/206 388/314/282 Capacity (H/M/L) 1.94/1.84/1.68 2.64/2.4/1.99 2.94/2.58/2.34 Cooling Water flow rate(H/M/L) m3/h 0.35/0.33/0.3 0.47/0.43/0.36...
  • Page 9 MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series Specifications Model MKG- 500-BA 600-BA Power supply V/Ph/Hz 220-240/1/50 841/723/594 915/836/714 Air flow (H/M/L) 495/425/349 538/492/420 Capacity (H/M/L) 4.01/3.61/3.1 4.61/4.33/3.84 Cooling Water flow rate(H/M/L) m3/h 0.72/0.65/0.56 0.83/0.78/0.69 Water pressure drop(H/M/L) 47.1/33.5/29.7...

  • Page 10: Dimensions

    Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 Dimensions C-panel Model MKG-250A MKG-300A MKG-400A MKG-500A MKG-600A 1070 1070 S-panel MKG-250-BA, MKG-300-BA, MKG-400-BA - 9 -...

  • Page 11: Service Spaces

    MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MKG-500-BA, MKG-600-BA Service Spaces - 10 -...
  • Page 12 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 - 11 -...

  • Page 13: Wiring Diagrams

    MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series Wiring Diagrams Temp.compensation value is 2 pipe 0 under cool mode(default) 1 2 3 4 1 2 3 4 S1-1 Temp.compensation value is 4 pipe 1 under cool mode 1 2 3 4...

  • Page 14: Capacity Tables

    Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 Capacity Tables Δt: Temperature Difference (° C) EWT: Enter Water Temp. (° C) DB: Dry Bulb Temp. (° C) WB: Wet Bulb Temp. (° C) TC: Total Cooling Capacity (kW)
  • Page 15 MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series 1.48 0.82 0.21 2.61 1.47 1.03 0.21 2.55 1.46 1.23 0.21 2.52 1.51 1.44 0.22 2.74 Continued: MKG-250-BA/MKG-250A Indoor Indoor temperature (D.B.) EWT ΔT temp (W.B.) WF WPD TC WF WPD TC...
  • Page 16 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 Cooling Capacity MKG-300-BA/ MKG-300A Indoor Indoor temperature (D.B.) EWT ΔT temp (W.B.) WF WPD TC WF WPD TC WF WPD TC WF WPD TC WF WPD ° C ° C °...
  • Page 17 MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series Continued: MKG-300-BA/ MKG-300A Indoor Indoor temperature (D.B.) EWT ΔT temp (W.B.) WF WPD TC WF WPD TC WF WPD TC WF WPD TC WF WPD ° C ° C ° C...
  • Page 18 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 Cooling Capacity MKG-400-BA/ MKG-400A Indoor Indoor temperature (D.B.) EWT ΔT temp (W.B.) SC WF WPD TC SC WF SC WF SC WF WPD TC SC WF WPD ° C ° C °...
  • Page 19 MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series Continued: MKG-400-BA/ MKG-400A Indoor Indoor temperature (D.B.) EWT ΔT temp (W.B.) WF WPD TC WF WPD TC WF WPD TC WF WPD TC WF WPD ° C ° C ° C...
  • Page 20 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 Cooling Capacity MKG-500-BA/MKG-500A Indoor Indoor temperature (D.B.) EWT ΔT temp (W.B.) TC SC WF TC SC WF TC SC WF TC SC WF TC SC WF ° C ° C °...
  • Page 21 MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series Continued: MKG-500-BA/MKG-500A Indoor Indoor temperature (D.B.) EWT ΔT temp (W.B.) WF WPD TC WF WPD TC WF WPD TC WF WPD TC WF WPD ° C ° C ° C...
  • Page 22 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 Cooling Capacity MKG-600-BA/ MKG-600A Indoor Indoor temperature (D.B.) EWT ΔT temp (W.B.) TC SC WF TC SC WF TC SC WF TC SC WF TC SC WF ° C ° C °...
  • Page 23 MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series Continued: MKG-600-BA/ MKG-600A Indoor Indoor temperature (D.B.) EWT ΔT temp (W.B.) SC WF WPD TC SC WF SC WF SC WF WPD TC SC WF WPD ° C ° C °...
  • Page 24 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 Heating Capacity Δt: Temperature Difference (℃) TH: Total Heating Capacity (kW) WF: Water Flow (m WPD: Water Pressure Drop (kPa) MKG-250-BA/MKG-250A Indoor temperature (W.B.) ΔT ° C ° C 1.87 0.20...
  • Page 25 MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series Heating Capacity Δt: Temperature Difference (℃) TH: Total Heating Capacity (kW) WF: Water Flow (m WPD: Water Pressure Drop (kPa) MKG-300-BA/ MKG-300A Indoor temperature (W.B.) ΔT ° C ° C 2.35...
  • Page 26 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 Heating Capacity Δt: Temperature Difference (℃) TH: Total Heating Capacity (kW) WF: Water Flow (m WPD: Water Pressure Drop (kPa) MKG-400-BA/ MKG-400A Indoor temperature (W.B.) ΔT ° C ° C 2.84...
  • Page 27 MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series Heating Capacity Δt: Temperature Difference (℃) TH: Total Heating Capacity (kW) WF: Water Flow (m WPD: Water Pressure Drop (kPa) MKG-500-BA/MKG-500A Indoor temperature (W.B.) ΔT ° C ° C 3.63 0.39...
  • Page 28 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 Heating Capacity Δt: Temperature Difference (℃) TH: Total Heating Capacity (kW) WF: Water Flow (m WPD: Water Pressure Drop (kPa) MKG-600-BA/ MKG-600A Indoor temperature (W.B.) ΔT ° C ° C 3.76...

  • Page 29: Sound Levels

    MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series 7. Sound Levels Noise level under three speeds of fan [dB(A)] Series Model MKG-250 MKG-300 C panel MKG-400 MKG-500 MKG-600 MKG-250-B MKG-300-B S panel MKG-400-B MKG-500-B MKG-600-B - 28 -...
  • Page 30 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 MKG-250BA MKG-300BA - 29 -...
  • Page 31 MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MKG-400BA MKG-500BA - 30 -...
  • Page 32 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 MKG-600BA - 31 -...

  • Page 33: Exploded View

    MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series 8. Exploded View C panel Part Name Quantity Part Name Quantity Filter Louver Evaporator I Panel dalle Evaporator II Panel Evaporator Ⅲ Panel frame ass'y - 32 -...
  • Page 34 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 Coil temp sensor Stepper motor Evaporate connect board Screw cover Display board ass'y Pipe clamp Motor Drainage pan Base pan assembly Bearing base Motor spud Evaporator left clapboard E-part box ass'y Water inlet pipe ass'y 11.1...

  • Page 35: Installation

    MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series Part Name Quantity Part Name Quantity Panel ass'y Pipe clamp Panel decorative plates Chassis ass'y Electrical cover Drainage pan ass'y Panel frame ass'y Cross fan Screw cover Bearing block Sealing plug Evaporator ass'y 21.1...

  • Page 36: Installation Order

    Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 the terminal. If connection or fixing is not perfect, it will cause heat-up or fire at the connection. • Wiring routing must be properly arranged so that control board cover is fixed properly.
  • Page 37 MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series • Wiring; • Test operation. - 36 -...

  • Page 38: Inspecting And Handling The Unit

    Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 13.2 Accessory Name Shape Quantity Function Installation board Screw ST3.9x25 for installation board Secure the installation board Plastic expanded tube Wrapping tape Drain pipe Sealing clay Wall conduit cover Remote controller (including operation manual)
  • Page 39 MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series  A place which is convenient to maintenance.  A place which provides the space around the indoor unit as required right in the diagram.  There is strong electromagnetic wave existing.

  • Page 40: Connection Pipe

    Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 When connection extension drain hose, insulate the connecting part of extension drain hose with a shield pipe.  Connection pipe 1. When install the water pipe of G unit, please following it Put down two screws between the pipe holder and unit, and then get down pipe holder.
  • Page 41 MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series 2. For the left-hand and rear-left-hand piping, install the piping as shown. Bend the connective pipe to be laid at 43mm height or less from the wall. 3. Fix the end of the connective pipe.

  • Page 42: Water Pipe Installation

    Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 to side to see that it is securely hooked. • Piping can easily be made by lifting the indoor unit with a cushioning material between the indoor unit and the wall.
  • Page 43 MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series 13.6 Wiring Cautions: • The reserved function is indicated in broken line table, users can select it when necessary. • An all-pole disconnection device which has at least 3mm separation distance in all pole and a residual current device (RCD) with the rating of above 10mA shall be incorporated in the fixed wiring according to the national rule.
  • Page 44 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 Please adopt the shielded twisted-pair wire, and connect the shielded layer to E Insert 2 & 3 together is OK The reserved wire control function is indicated in broken line table, users can purchase the wire controller when necessary.

  • Page 45: Troubleshooting

    MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series Every air-conditioner in network has only one network address to distinguish each other. Address code of air-conditioner in LAN is set by code switch on Network Interface Module (NIM), and the set range is 0-63.
  • Page 46 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 E2: T1 evaporator sensor malfunction E3: T1 ev aporator sensor malfunction. Exist T1 connecting wire between sensor and Reconnect and ensure that the mainboa rd gets loose. connection is reliable.
  • Page 47 MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series 13.7.4 E8: Fan motor malfunction - 46 -...
  • Page 48 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 E 8 : F a n f a u l t Y e s I s t h e m o t o r f a n s t u ck...
  • Page 49 MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series If one of the following malfunctions occur, stop operation, shut off the power, and contact with your dealer. • The operation lamp is flashing rapidly (twice every second) • This lamp is still flashing rapidly after turn off the power and turn on again.

  • Page 50: Controller

    Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 Up to the set time, the air • Check whether the timer operation The TIMER ON indicator conditioner will automatically start is started when the “TIME ON” is goes off after a lapse of and the appropriate indicator will certain time.
  • Page 51 MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series  Introduction of Function Buttons on the Remote Controller 1. TEMP DOWN Button: Push the TEMP DOWN button to decrease the indoor temperature setting or to adjust the timer in a counter-clockwise direction.

  • Page 52: Operational Guidelines

    Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906  Introduction of Indicators 1. TRANSMISSION Indicator: This indicator lights when remote controller transmits signals to indoor unit. 2. MODE Display: Shows the current operation mode - AUTO, COOL, DRY or HEAT. HEAT only available for heat pump model.
  • Page 53 MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series 3. Push the ON/OFF button to start the air conditioner. The OPERATION lamp on the display panel of the indoor unit lights. The operating mode of AUTO FAN SPEED is automatically set and there are no indicators shown on the display panel of the remote controller.

  • Page 54: Optional Controller

    Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 6) After setting the TIMER there will be a one-half second delay before the remote controller transmits the signals to the Air Conditioner. Then after approximately another 2 seconds, the set temperature will re-appear on the digital display.
  • Page 55 MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series 3. Indoor setting temperature range: 17° C ~30° C. 4. LCD (Liquid Crystal Display). 5. Touch key 6. Can switch Fahrenheit degree and Centigrade degree. 14.2.2 Function summarize KJR-29B is the touch key wired controller.
  • Page 56 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 unit, or use the swing button on the wired remote controller to control the indoor unit for swinging. (2) ON/OFF button Press the ON/OFF button to control the indoor unit on and off state. When the unit is turned off, press the ON/OFF button, the unit will be turned on and the operating icon lights up.
  • Page 57 MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series then the timer will be canceled simultaneously. (7) Clock setting Long press the timer/clock setting button for 3 seconds, and then enter into the clock setting state. The hour position of the clock will flash, and can press Temp setting buttons to adjust the hour value.
  • Page 58 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 (12) Follow me function When the system is running and the operating mode is Cooling, Heating or Auto, press the left button will activate the Follow Me function. Press left button again will cancel follow me function. When the operating mode is changed, and then will cancel this function as well.

  • Page 59: Preparation Before Installation

    MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series The wiring should adapt to the wired controller current. Otherwise, electric leakage or heating may occur and result in fire. The specified cables shall be applied in the wiring. No external force may be applied to the terminal.

  • Page 60: Wiring Figure

    Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 ※ Dimensions: 120*120*20mm Figure A ※ Wiring principle sketch ※ Wiring figure: 1) Connect two terminals of embedded 4-core shielding wire with the switching wires of wired remote controller and signal receiving board. Make sure the sequence of 4 terminals (A, B, C and D) should correspond to the wire sequence of signal switching wires (A, B, C and D).

  • Page 61: Back Cover Installation

    MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series ※ Back cover installation 1) Use straight head screwdriver to insert into the buckling position in the bottom of a wired controller, and spin the screwdriver to take down the back cover. (Pay attention to spinning direction, if not you maybe damage the back cover.)
  • Page 62 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 4) Adjust the length of two plastic screw bars in the accessory to be the standard length from the electrical box screw bar to the wall. Make sure when install the screw bar to the electrical box screw bar, make it as flat as the wall.

  • Page 63: Front Cover Installation

    MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series 2) Shielded wiring When the wired controller is stalled with electrician box, the back cover of wired controller is already reserved one hole for wire outlet. It is also available for the shielded wire passing by the wall.
  • Page 64 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 ※ Wired controller initial parameters setting: Change the related functions of the controller through adjusting the initial parameters, details refer to table 1 2. The wired controller initial parameter includes two codes "XY", the first code "X"...
  • Page 65 MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series - 64 -...
  • Page 66 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 Caution: 14.2.3 Central Controller: MD-CCM30 CCM30 is new designed and it is a touch key centralized controller. It can be connected up to 64 indoor units, and the connection length can be up to 1200m. The CCM30 centralized controller has the air filter cleaning reminding function and it is convenient to remind users to clean the air filter.
  • Page 67 MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series General functions and description (1) Query key Any time when you press the key, the selected operation mode is to query the operational state of the air conditioner. By default, the first in-service air conditioner will be queried.
  • Page 68 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 (3) Fan key Under the setting operation mode, press this key to set the fan of the indoor unit to run in the automatic, high, medium or low level of air.
  • Page 69 MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series (9) Downward key In the main page, press this key can enter the query mode. By default, it is the first in-service air conditioner. In any other time, press this key will select the next row corresponding position air conditioner.
  • Page 70 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 ① Temperature adjusting method Press this key " ", the setting temperature will decrease 1℃. If you hold down this key, the setting temperature will decrease one by one. When reached the lowest allowed set temperature, it cannot decrease.
  • Page 71 MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series LED display - 70 -...
  • Page 72 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 Other operations ※ Various locking functions 1. Centralized controller locking The centralized controller locking state will be recorded when powered off. It won't dismiss when re-power on until receiving the unlocking order.
  • Page 73 MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series ① Can lock or unlock through the computer. ② Can operate by a centralized controller. In the centralized controller setting interface, press LOCK key to lock or unlock. If the current state is remote controller locking, press the key to unlock.
  • Page 74 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 ※ Emergency stop and forced on When the emergent stop switch of the centralized controller is connected, all the air conditioners in the centralized controller network will be shut down compulsorily, and the LED flashes as 0.5Hz.The centralized controller and computer and all functional modules are disabled from startup and shutdown until the emergent stop switch is broken.
  • Page 75 MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series will not be sent to the air conditioner, and the current operation of the air conditioner is not affected (except locking operation). ※ Use " " key to TURN ON and TURN OFF the unit Only can operate all air conditioners, not for single in the centralized controller network: Long press "...
  • Page 76 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 and hold on then press QUERY key " ", can clear FL reminding. At the same time, the accumulated time of centralized controller powered on will be cleared. 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 a.
  • Page 77 MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series Table 2.1: The code of selecting the Table 2.2: The code of different times clear filter function of reminding clear filter Function code Function setting Parameter code Time (hour) Only display, no function...
  • Page 78 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 you set the address of every indoor unit manually. Fault and protection codes Fault code Content Other faults Water level detection malfunction Reserved Cleaning malfunction Inverter module protection Current of compressor is too large (4 Times)
  • Page 79 MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series Protection code Content Other protection Reserved Reserved Reserved Reserved Reserved Reserved Compressor’s current is too large Voltage of power supply is too high or too low Pressure of discharge is too low Pressure of discharge is too high Temp.
  • Page 80 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906  In the setting page, if the selected air conditioner is in the remote controller locked state (in case of non-single unit operation, as long as one unit is in the remote controller locked state, it is deemed the locked state), the flag ( ) is displayed constantly.
  • Page 81 MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series The LCD displays the main page, 60 air conditioners are in service, of which 28 are powered on and 32 off. In the matrix, the bid dots from (16+, 00) to (32+, 15) are luminous, and the small dots are not luminous. It indicates the 32 air conditioners with the addresses from 16 to 47 are powered off.

  • Page 82: Dimensions (Unit: Mm)

    Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 The LCD display displays the setting page, and queries the air conditioner with the address of 01. The mode of the air conditioner with the address 01 is: Cooling, high fan speed, swing on, setting temperature 22°...
  • Page 83 MCAC-UTSM-201906 Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series CCM30/BKE-A CCM30/BKE-B 48.5 CCM30/BKE-A CE-CCM30/BKE-A - 82 -...

  • Page 84: Installation Diagram

    Midea 50Hz AC Fan Coil Unit Two-pipe Wall-mounted Series MCAC-UTSM-201906 ※ Installation diagram ※ Terminal instruction F O R C E D O N E N G . ST O P - 83 -...

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