Midea MGA-D10/N1 Manual
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Midea MGA-D10/N1 Manual

R410a mini split chiller 50hz
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MCAC-ATSM-2014-01
1. Model Names of Outdoor Units ...................................... 2
2. External Appearance ....................................................... 2
3. Nomenclature ................................................................... 3
4. Features ............................................................................ 4
5. Descriptions of Standard Unit ........................................ 6
6. Specifications .................................................................. 8
7. Dimensions .................................................................... 12
8. Service Space ................................................................. 13
9. Piping Diagram .............................................................. 14
10. Wiring Diagrams .......................................................... 15
11. Electric Characteristics ............................................... 17
12. Capacity Tables ............................................................ 18
13. Operation Limits .......................................................... 26
14. Hydraulic Performance ................................................ 28
15. Sound Levels ............................................................... 29
16. Exploded Views............................................................ 30
17. Troubleshooting ........................................................... 38
18. Installation .................................................................... 51
19. Maintenance ................................................................. 60
20. Controller ...................................................................... 62
※The specifications, designs, and information in this book are subject to change without notice for
product improvement.
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R410A Mini Split Chiller 50Hz
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  • Page 1: Table Of Contents

    MCAC-ATSM-2014-01 R410A Mini Split Chiller 50Hz Content 1. Model Names of Outdoor Units ........2 2. External Appearance ............2 3. Nomenclature ..............3 4. Features ................4 5. Descriptions of Standard Unit ........6 6. Specifications ..............8 7. Dimensions ..............12 8.

  • Page 2: Model Names Of Outdoor Units

    1. Model Names of Outdoor Units Capacity Heat Compressor Power Supply Model Refrigerant A/C mode Water pump box (kW) exchanger type (V-Ph-Hz) MGA-D10/N1 R410A 10.5 Plate type Digital scroll Heat pump CE-SBX/N1-01 220-240, 1, 50 MGA-D12/N1 R410A Plate type Digital scroll Heat pump...

  • Page 3: Nomenclature

    M G A- D 14 / S N1 Refrigerant N1: R410A Power supply S:380-415V,50Hz,3Ph -:220-240V,50Hz,1Ph Capacity(14kW) Compressor type D: Digital scroll compressor F: Fixed scroll compressor Product series code A: Split chiller C: Unitary chiller Light commercial chiller system Midea...

  • Page 4: Features

    R410A Mini Split Chiller 50Hz MCAC-ATSM-2014-01 4. Features 4.1 R410A environment friendly refrigerant, no harm to ozone layer. No harm to ozone leyer Greenhouse effect is small 4.2 Easy for installation Air-cooled system, no need cooling water tower, packaged design, easy for installation. 4.3 Energy saving and high reliability a.
  • Page 5 The setting and operation order can be send to the main board and the running condition can be displayed by the wired controller. It can connect max. 16PCBs. It is available for all Midea air cooled scroll chillers. The MODBUS gateway can be customized, it is available by communication port X,Y and E in wired controller.

  • Page 6: Descriptions Of Standard Unit

    Condensate collection pan as standard. Compressor Midea mini split chillers are equipped with Copeland brand high efficiency, reliable and silence digital scroll compressor, the capacity can be stepless adjusted , the chiller can bring you more comfortable living condition with less energy consumption.
  • Page 7 MCAC-ATSM-2014-01 R410A Mini Split Chiller 50Hz Outdoor unit MGA-D10/N1 MGA-D12/N1, MGA-D14/SN1, MGA-D16/SN1 Water pump box...

  • Page 8: Specifications

    R410A Mini Split Chiller 50Hz MCAC-ATSM-2014-01 6. Specifications Model MGA-D10/N1 MGA-D12/N1 Code 220090400050 220090400030 Power supply V-Ph-Hz 220-240, 1, 50 220-240, 1, 50 Capacity 10.5 Cooling*(1) Input 3912 3978 Capacity 13.0 Heating*(2) Input 4216 4260 Max. input consumption 6150 6200 Max.
  • Page 9 MCAC-ATSM-2014-01 R410A Mini Split Chiller 50Hz Net/ Gross weight 109/115 122/128 Model CE-SBX/N1-01 CE-SBX/N1-01A Code 220095700030 220095700010 Water pump box Net dimension (W×H×D) 905×370×366 905×370×366 Packing dimension (W×H×D) 1057×439×436 1057×439×436 Net/ Gross weight 54/59 54/59 Type R410A R410A Refrigerant Charged volume Φ9.53 Φ9.53 Liquid side...
  • Page 10 R410A Mini Split Chiller 50Hz MCAC-ATSM-2014-01 Model MGA-D14/SN1 MGA-D16/SN1 Code 220090400020 220090400040 Power supply V-Ph-Hz 380-415, 3, 50 380-415, 3, 50 Capacity Cooling*(1) Input 4453 4904 Capacity Heating*(2) Input 4828 4943 Max. input consumption 6400 6600 Max. input current 12.4 12.5 Starting current Model...
  • Page 11 MCAC-ATSM-2014-01 R410A Mini Split Chiller 50Hz Net/ Gross weight 54/59 55/56 Type R410A R410A Refrigerant Charged volume Φ9.53 Φ9.53 Liquid side Refrigerant pipe diameter Φ19 Φ19 Gas side Pipe diameter Water inlet/outlet DN32 DN32 Controller Wired controller KJRM-120D/BMK-E Cooling: 10℃~43℃ Cooling: 10℃~43℃...

  • Page 12: Dimensions

    R410A Mini Split Chiller 50Hz MCAC-ATSM-2014-01 7. Dimensions 7.1 Outdoor unit Unit: mm Dimensions Model MGA-D10/N1 MGA-D12/N1 1250 MGA-D14/SN1 1250 MGA-D16/SN1 1250 7.2 Water pump box...

  • Page 13: Service Space

    MCAC-ATSM-2014-01 R410A Mini Split Chiller 50Hz 8. Service Space...

  • Page 14: Piping Diagram

    R410A Mini Split Chiller 50Hz MCAC-ATSM-2014-01 9. Piping Diagram Remark: Name Name Name Compressor Capillary Liquid receiver High pressure switch Liquid receiver Low pressure switch 4 -way valve Plate heat exchanger Crankcase heater Condenser PWM valve Filter Water temperature sensor...

  • Page 15: Wiring Diagrams

    MCAC-ATSM-2014-01 R410A Mini Split Chiller 50Hz 10. Wiring Diagrams 10.1 MGA-D10/N1...
  • Page 16 R410A Mini Split Chiller 50Hz MCAC-ATSM-2014-01 10.2 MGA-D12/N1 10.3 MGA-D14/SN1 MGA-D16/SN1...

  • Page 17: Electric Characteristics

    Total 5×20mm Model Power supply values(2) 250V (V-Ph-Hz) F.L.I. F.L.A. L.R.A. F.L.I. F.L.A. F.L.I. F.L.A. F.L.I. F.L.A. F.L.I. F.L.A. Fuse 1 (kW) (kW) MGA-D10/N1 220-240-1-50 5.0 23.2 26.8 7.54 34.8 MGA-D12/N1 220-240-1-50 5.0 23.2 0.37 7.63 35.1 MGA-D14/SN1 380-415-3-50 5.75 82.4...

  • Page 18: Capacity Tables

    R410A Mini Split Chiller 50Hz MCAC-ATSM-2014-01 12. Capacity Tables 12.1 Cooling capacity Model MGA-D10/N1 (° C) (° C) (kW) 10.9 11.2 11.5 11.8 12.1 12.4 (kW) (kW) △Pev (kPa) 47.3 47.6 50.0 50.3 54.0 57.0 (kW) 10.4 10.8 11.1 11.5 11.8...
  • Page 19 MCAC-ATSM-2014-01 R410A Mini Split Chiller 50Hz Model MGA-D12/N1 (° C) (° C) (kW) 12.4 12.7 13.0 13.3 13.6 13.9 (kW) (kW) △Pev (kPa) 46.6 47.8 49.6 51.8 54.6 60.0 (kW) 11.9 12.2 12.5 12.8 13.1 13.4 (kW) (kW) △Pev (kPa) 37.0 37.1 40.6...
  • Page 20 R410A Mini Split Chiller 50Hz MCAC-ATSM-2014-01 Model MGA-D14/SN1 Ta. (° C) Tw (° C) Pf (kW) 14.8 15.1 15.4 15.7 16.1 16.4 Pa (kW) Pat (kW) Qev (m △Pev (kPa) 49.3 50.0 51.7 53.0 56.1 57.8 Pf (kW) 14.1 14.4 14.7 15.0 15.3...
  • Page 21 MCAC-ATSM-2014-01 R410A Mini Split Chiller 50Hz Model MGA-D16/SN1 (° C) (° C) (kW) 15.5 15.7 16.0 16.3 16.5 16.8 (kW) (kW) △Pev (kPa) 54.9 57.6 59.4 62.1 65.2 67.7 (kW) 14.9 15.2 15.5 15.8 16.1 16.4 (kW) (kW) △Pev (kPa) 51.0 52.9 50.9...
  • Page 22 R410A Mini Split Chiller 50Hz MCAC-ATSM-2014-01 12.2 Heating capacity Model MGA-D10/N1 Ta. U.R.87% (° C) Tw (° C) — Pt (kW) — Pa (kW) — Pat (kW) — Qc (m △ Pc (kPa) — 29.4 28.4 27.0 Pt (kW) Pa (kW)
  • Page 23 MCAC-ATSM-2014-01 R410A Mini Split Chiller 50Hz Model MGA-D12/N1 (° C) (° C) Ta. U.R.87% — Pt (kW) 11.0 10.9 10.8 — Pa (kW) — Pat (kW) — Qc (m △ Pc (kPa) — 41.6 41.0 40.3 Pt (kW) 12.2 12.1 12.0 11.9 Pa (kW)
  • Page 24 R410A Mini Split Chiller 50Hz MCAC-ATSM-2014-01 Model MGA-D14/SN1 (° C) (° C) Ta. U.R.87% — Pt (kW) 10.4 10.5 10.6 — Pa (kW) — Pat (kW) — Qc (m △ Pc (kPa) — 25.8 27.2 27.0 Pt (kW) 13.1 13.0 13.0 12.9 Pa (kW)
  • Page 25 MCAC-ATSM-2014-01 R410A Mini Split Chiller 50Hz Model MGA-D16/SN1 (° C) (° C) Ta. U.R.87% — Pt (kW) 11.5 11.4 11.3 — Pa (kW) — Pat (kW) — Qc (m △ Pc (kPa) — 25.0 25.0 24.8 Pt (kW) 14.2 14.1 14.0 13.9 Pa (kW)

  • Page 26: Operation Limits

    R410A Mini Split Chiller 50Hz MCAC-ATSM-2014-01 13. Operation Limits Outdoor ambient temperature: 10℃～43℃ Cooling operation Outlet water temperature: 5℃-17℃ Outdoor ambient temperature: -15℃～24℃ Heating operation Outlet water temperature: 45℃-50℃ Cooling Heating 13.1 Ethylene glycol solution Water and ethylene glycol solutions used as a thermal vector in the place of water reduce the performance of the unit.
  • Page 27 13.3 Minimum water volume Model MGA-D10/N1 MGA-D12/N1 MGA-D14/SN1 MGA-D16/SN1 Minimum water volume (L) If the total water volume in the system is less than the value in the table above, the additional water tank is necessary in order to avoid the compressor On/Off frequency.

  • Page 28: Hydraulic Performance

    (*) To obtain the useful head of the installation, subtract the pressure drop of the plate heat exchanger. 14.2 Heat exchanger pressure drop (water side) Model Water flow l/sec 0.222 0.278 0.333 0.389 0.444 0.500 0.556 MGA-D10/N1 Pressure drop Model Water flow l/sec 0.333 0.389 0.444 0.500 0.556 0.611 0.667 0.722...

  • Page 29: Sound Levels

    MCAC-ATSM-2014-01 R410A Mini Split Chiller 50Hz 15. Sound Levels MGA-D10/N1 MGA-D12/N1, MGA-D14/SN1, MGA-D16/SN1 Outdoor Unit Microphone 1.0m Note: H= 0.5 × height of outdoor unit Note: The point A is in the middle of the whole outdoor panel. Model Noise level dB(A)

  • Page 30: Exploded Views

    R410A Mini Split Chiller 50Hz MCAC-ATSM-2014-01 16. Exploded Views 16.1 MGA-D10/N1 Matched water pump box- CE-SBX/N1-01...
  • Page 31 MCAC-ATSM-2014-01 R410A Mini Split Chiller 50Hz MGA-D10/N1 Part Name Quantity Part Name Quantity Top cover ass'y 7.25 Wire joint Rear Supporter 7.26 Compressor capacitor Condenser ass'y 7.27 Wire clamp High pressure valve ass'y Separator Low pressure valve Big handle Partition board ass'y...
  • Page 32 R410A Mini Split Chiller 50Hz MCAC-ATSM-2014-01 16.2 MGA-D12/N1 Matched water pump box- CE-SBX/N1-01A...
  • Page 33 MCAC-ATSM-2014-01 R410A Mini Split Chiller 50Hz MGA-D12/N1 Part Name Quantity Part Name Quantity Top cover ass'y 4-way valve ass'y Accumulator cylinder 11.1 4-way valve Condenser ass'y 11.2 4-Ways valve solenoid Valve plate 11.3 Low pressure valve Front clapboard ass'y Compressor E-part box ass'y Base AC contactor...
  • Page 34 R410A Mini Split Chiller 50Hz MCAC-ATSM-2014-01 16.3 MGA-D14/SN1 Matched water pump box- CE-SBX/SN1-01...
  • Page 35 MCAC-ATSM-2014-01 R410A Mini Split Chiller 50Hz MGA-D14/SN1 Part Name Quantity Part Name Quantity Top cover ass'y 11.1 4-way valve Accumulator cylinder 11.2 4-Ways valve solenoid Condenser ass'y 11.3 Low pressure valve Valve plate Compressor Front clapboard ass'y Base E-part box ass'y Compressor electric heater AC contactor Discharge pipe ass'y...
  • Page 36 R410A Mini Split Chiller 50Hz MCAC-ATSM-2014-01 16.4 MGA-D16/SN1 Matched water pump box- CE-SBX/SN1-01A...
  • Page 37 MCAC-ATSM-2014-01 R410A Mini Split Chiller 50Hz Part Name Quantity Part Name Quantity Top cover ass'y 11.1 4-way valve Accumulator cylinder 11.2 4-Ways valve solenoid Condenser ass'y 11.3 Low pressure valve Valve plate Compressor Front clapboard ass'y Base E-part box ass'y Compressor electric heater AC contactor Discharge pipe ass'y...

  • Page 38: Troubleshooting

    R410A Mini Split Chiller 50Hz MCAC-ATSM-2014-01 17. Troubleshooting 17.1 Troubles cause and solution Troubles Causes Solution 1. Voltage is out of operation range. Check wiring and circuit Water pump doesn’t work. 2. Water flow in the water pump box is Check whether the water system is blocked with abnormal sundries.
  • Page 39 MCAC-ATSM-2014-01 R410A Mini Split Chiller 50Hz E0: Water flow test malfunction LED indicates E0 Check the water pump, and repair or replace it The water pump gets faulty. if necessary. Check the water flow switch, and repair or Water flow switch gets faulty. replace it if necessary.
  • Page 40 R410A Mini Split Chiller 50Hz MCAC-ATSM-2014-01 E1: Phase sequence malfunction LED indicates E1 Check whether the phase order of 3-phase power supply is incorrect. Exchange the power wire of any two phases. Check whether the 3-phase power supply lacks Check the power supply and power wire. phase.
  • Page 41 MCAC-ATSM-2014-01 R410A Mini Split Chiller 50Hz E3: Inlet water temperature sensor checking channel is abnormal LED indicates E3 Check whether the wiring of inlet water temperature sensor is broken. Connect the wiring well. Check whether the inlet water temperature sensor is broken: see whether the resistance of inlet water Replace the inlet water temperature sensor.
  • Page 42 R410A Mini Split Chiller 50Hz MCAC-ATSM-2014-01 E5: Outlet water temperature sensor checking channel is abnormal LED indicates E5 Check whether the wiring of outlet water temperature sensor is broken. Connect the wiring well. Check whether the outlet water temperature sensor is broken: see whether the resistance of outlet water Replace the outlet water temperature sensor.
  • Page 43 MCAC-ATSM-2014-01 R410A Mini Split Chiller 50Hz E7: Plate heat exchanger temperature sensor 1 checking channel is abnormal LED indicates E7 Check whether the wiring of plate heat exchanger temperature sensor 1 is broken. Connect the wiring well. Check whether the plate heat exchanger temperature sensor 1 is broken: see whether the resistance of Replace the plate heat exchanger plate heat exchanger temperature sensor is wrong.
  • Page 44 R410A Mini Split Chiller 50Hz MCAC-ATSM-2014-01 E9: Digital scroll compressor discharge temperature sensor is abnormal (thermostat display E4) LED indicates E9 Check whether air outlet is blocked Clear the sundries to ensure smooth by sundries. discharge. Check whether the condenser coil fin Clean the condenser.
  • Page 45 MCAC-ATSM-2014-01 R410A Mini Split Chiller 50Hz P0: Current protection LED indicates P0 Check whether the compressor motor Check the compressor, and repair or replace it gets faulty. if necessary. Reduce the refrigerant. Check whether the refrigerant is charged too much (the high pressure>...
  • Page 46 R410A Mini Split Chiller 50Hz MCAC-ATSM-2014-01 P1: High pressure protection LED indicates P1 High pressure protection. Whether the wiring between the high pressure switch and main control board is connected well and Connect it well. correctly. Whether the high pressure switch is broken. Validate: Short connect the high pressure switch socket, check whether the system can run normally.
  • Page 47 MCAC-ATSM-2014-01 R410A Mini Split Chiller 50Hz P2: Low pressure protection LED indicates P2 Low pressure protection. The wiring between the low pressure switch and main control board is connected well or correctly. Connect it well. Whether the low pressure switch is broken. Validate: Short connect the low pressure switch Replace low pressure switch.
  • Page 48 R410A Mini Split Chiller 50Hz MCAC-ATSM-2014-01 P3: Discharge temperature protection Refer to the E9 to solve the problem P4: Inlet–outlet water temperature difference protection LED indicates P4 Check whether inlet–outlet water temperature-sensor Replace the temperature-sensor kits. kits gets faulty. Check whether the sequence of the four Fix it well.
  • Page 49 MCAC-ATSM-2014-01 R410A Mini Split Chiller 50Hz P6: Plate heat exchanger low temperature protection LED indicates P6 Check whether the temperature-sensor kit at the Replace the temperature-sensor kit. plate heat exchanger side gets faulty. Clean the water side heat exchanger or pipe. The heat exchange of water side is insufficient.
  • Page 50 R410A Mini Split Chiller 50Hz MCAC-ATSM-2014-01 Pb: System anti-frozen protection LED indicates Pb Check whether the circulation water is insufficient: Check the water system and make (Q<0.6×Q adjustment. rated Check whether the plate heat exchanger temperature Replace the temperature sensor. sensor is abnormal.

  • Page 51: Installation

    MCAC-UTSM-2014-01 R410A Mini Split Chiller 50Hz 18. Installation 18.1 Installation of general information General warning 1. These units have been designed to chill and heat water and must be used in applications compatible with their performance characteristics; these appliances are designed for residential or similar applications. 2.
  • Page 52 R410A Mini Split Chiller 50Hz MCAC-UTSM-2014-01 18.2 Installation 18.2.1. Choice of installation site Before installing the unit, agree with the customer the site where it will be installed, taking the following points into consideration: - check that the fixing points are adequate to support the weight of the unit; - pay scrupulous respect to safety distances between the unit and other equipment or structures to ensure that air entering the unit and discharged by the fans is free to circulate.
  • Page 53 MCAC-UTSM-2014-01 R410A Mini Split Chiller 50Hz 18.3.2 Refrigerant piping Note: 1. Refrigerant piping connection is on the right side of outdoor unit. 2. The piping connects to refrigerant piping connection. 3. Install the refrigerant piping towards left, right or back. 4.
  • Page 54 R410A Mini Split Chiller 50Hz MCAC-UTSM-2014-01 Caution Too large torque will harm the bell-mouth and too small will cause leakage. Please determine the torque according to the table below: Flare dimension A Pipe gauge Tightening torque Flare shape Min (mm) Max 15～16N.m Φ6.4 (153～163kgf.cm)
  • Page 55 MCAC-UTSM-2014-01 R410A Mini Split Chiller 50Hz 5. After vacuuming, close the Lo-lever of manifold valve and turn off vacuum pump. When doing vacuuming for more than 15 minutes, please confirm that the indicator of multi-meter points to-1.0X105Pa(-76cmHg) 6. Totally open the Hi-stop valve and Lo-stop valve. 7.
  • Page 56 R410A Mini Split Chiller 50Hz MCAC-UTSM-2014-01 4) The flexible pipe should be used on water pump side. (The bending angle should not exceed 90° . The bending part is preferably in the middle of the pipe, the bigger the bending radius, the better it is. Do not bend the pipe more than 3 times.) 5) Bending the connecting pipe of thin wall.
  • Page 57 - Before emptying, place the mains switch in the “off” position. - Make sure the installation fill/top-up water cock is closed. - Open the drain cock outside the unit and all the installation and terminal air vent valves. Size and position of connections Model MGA-D10/N1 MGA-D12/N1 MGA-D14/SN1 MGA-D16/SN1 R5/4”...
  • Page 58 R410A Mini Split Chiller 50Hz MCAC-UTSM-2014-01 18.6 Electrical connection 18.6.1 Notice The split mini chillers leave the factory already wired, and require the installation of an omnipolar thermal overload switch, a lockable mains disconnecting switch for the connection to the mains power supply , and the connection of the flow switch to the corresponding terminals.
  • Page 59 MCAC-UTSM-2014-01 R410A Mini Split Chiller 50Hz Electrical panel layout Name Name Name Power control board Terminal board Transformer Fan capacitor Emergency switch Compressor capacitor Compressor contactor 18.6.3 Outdoor unit wiring specifications Specifications Notes Model Name Quantity (for reference) (purchased by customers) 10.5/12kW Overall power core RVV-300/500 3×6.0mm...

  • Page 60: Maintenance

    R410A Mini Split Chiller 50Hz MCAC-UTSM-2014-01 19. Maintenance 19.1 Shut down for long periods If it is previewed not to use the machine for long periods, after deactivating the chiller: ● Make sure the remote switch SA1 is in the "OFF" position, or alternatively disconnect the unit from the power supply.
  • Page 61 MCAC-UTSM-2014-01 R410A Mini Split Chiller 50Hz ● Empty and dry the entire refrigerant circuit using a vacuum pump connected to the low and high pressure tap until the vacuometer reads about 10Pa. Wait a couple of minutes and check that this value does not rise to more than 200Pa.

  • Page 62: Controller

    R410A Mini Split Chiller 50Hz MCAC-UTSM-2014-01 20. Controller 20.1 Standard wired controller: KJRM-120D/BMK-E 20.1.1 Operating instructions of buttons 10.ON/OFF key 1. Operation icon 2. Mode area 11.Right, Left key 3. Setting temperature 12.OK key 4. Timing On/Off 13. Setting key 5.
  • Page 63 MCAC-UTSM-2014-01 R410A Mini Split Chiller 50Hz ○ 7 . Reserved; ○ 8 . Clock: Under normal status display clock; during timing setting it displays the setting timing time; ○ 9 . Water temperature: Under normal status display water temperature; during water temperature setting it displays the setting numerical value;...
  • Page 64 R410A Mini Split Chiller 50Hz MCAC-UTSM-2014-01 1) Setting water temperature: under main page directly press the “▲” or “▼” to adjust the water temperature, or press “Setting” key to enter and then press “▲” or “▼” to adjust. At that time the LCD will display “Setting temperature”...
  • Page 65 MCAC-UTSM-2014-01 R410A Mini Split Chiller 50Hz TIMER Example of Timing setting Main page Press “Setting” key twice to enter hour setting interface of “Timer 1 On” Through the “▲” or “▼” key, set the hour number of “Timing 1 On” to be 07 Press “...
  • Page 66 R410A Mini Split Chiller 50Hz MCAC-UTSM-2014-01 Press “SET” key 3 times to enter the working mode setting when the main unit is off power. press the “▲” or “▼” key to adjust , press “OK” key or wait for 7 seconds to be effective, and back to the main page; During setting process to press “Cancel”...
  • Page 67 MCAC-UTSM-2014-01 R410A Mini Split Chiller 50Hz c. The adjusting logic of heating mode: (the parameter of δ1,δ2,Tj1 and Tj2 are decided by the outdoor unit) T s- δ ≤ T s+1 - < δ ≥ T s +1 - T s- 1+δ...
  • Page 68 R410A Mini Split Chiller 50Hz MCAC-UTSM-2014-01 3) Press the “▲” or “▼” key to adjust the main unit serial number can query 16 sets main units status information from #0～#15. Press “ ” or “ ” to adjust the spot check sequence number of one main unit then can query all the status information of this unit.
  • Page 69 MCAC-UTSM-2014-01 R410A Mini Split Chiller 50Hz The wiring procedure and principles are shown in the figure: 20.1.7 Basic conditions of operating the wired controller： 1) Applicable range of supply voltage: Input voltage is 10V AC. 2) Operating environment temperature of wired controller: -10° C~+43° C. 3) Operating RH of wired controller: RH 40%~RH90%.
  • Page 70 R410A Mini Split Chiller 50Hz MCAC-UTSM-2014-01 20.2 Wired controller KJR-120A/MBTE(Optional) 20.2.1 NAMES OF KEYS ON THE WIRED CONTROLLER AND THE KEYPAD OPERATION DESCRIPTION ON/OFF TEMP SET TIMER SET CANCEL MODE PAGEUP ALARM CLEAR PAGEDOWN QUERY ADDRESS / - ADDRESS/+ CLOCK LOCK HYSTERESIS ADDRESS SET...
  • Page 71 MCAC-UTSM-2014-01 R410A Mini Split Chiller 50Hz Press the button, then can clear some errors which need to operate manually for recovery. These errors represent there are problems while the unit is operating, but will not affect the system safety. If this type of error came out frequently then it needs to check and maintain the unit.
  • Page 72 R410A Mini Split Chiller 50Hz MCAC-UTSM-2014-01 Press the button can return to the interface previous and not save the setting information when the timer switch is ON. If press the button for 3 seconds continuously, all the setting information of the timer will be cleared. ADDRESS/+ button Press this button at Check mode, when select the next modular, the operation status of the next modular will display;...
  • Page 73 MCAC-UTSM-2014-01 R410A Mini Split Chiller 50Hz When there is only one wired controller, it is necessary to execute this setting, the address of wired controller should be set to '0'(main wired controller). ○ 17 TIMER QUERY button Press the button can inquire the timer setting information, such as the week, the setting operation mode, the starting period, the end period and the setting temperature and so on.
  • Page 74 R410A Mini Split Chiller 50Hz MCAC-UTSM-2014-01 1.Through the hysteresis setting, the system can adjust the load effectively. 2.The adjusting logic of cooling mode : (the parameter of δ ,δ ,Tj1 and Tj2 are (The parameter of δ1,δ2,Tj1 and Tj2 are decided by the outdoor unit) (the parameter of δ...
  • Page 75 MCAC-UTSM-2014-01 R410A Mini Split Chiller 50Hz 20.2.4 OUTLINE OF FUNCTIONS This wired controller provides the following functions: 1. Connect with the outdoor unit through the terminals P, Q and E. Connect with the upper unit through the terminals X, Y and E(reserved).Connect with other wired controllers through the terminals P, Q and E. 2.
  • Page 76 R410A Mini Split Chiller 50Hz MCAC-UTSM-2014-01 NOTE: Please connect the attached shorted-wires to the corresponding communication port COM(I) or COM(O) in the main control board of the last parallel unit (dial code ). Directly connect to the last parallel unit if only one unit is connected.
  • Page 77 MCAC-UTSM-2014-01 R410A Mini Split Chiller 50Hz CLOCK set week ADDRESS/- ADDRESS/+ set hour ADDRESS/- ADDRESS/+ ADDRESS/+ ADDRESS/- set minute set done WEEKLY TIMER SETTING TIMER SET Set Timer Period 2 Select week ADDRESS/+ ADDRESS/- Set Period 2 start hour ADDRESS/- ADDRESS/+ Set Period 1 start hour ADDRESS/+...
  • Page 78 R410A Mini Split Chiller 50Hz MCAC-UTSM-2014-01 NOTE: In operating, press the key "CANCEL", to turn back to the previous step or the normal display interface. WEEKLY TIMER QUERY TIMER QUERY Select query week ADDRESS/+ ADDRESS/- Select query Period 1 ADDRESS/- ADDRESS/+ or Period 2 Select query start...
  • Page 79 MCAC-UTSM-2014-01 R410A Mini Split Chiller 50Hz 6.During changing or installing the battery, pay attention to the “+”,“-” poles of the battery and install it correctly, or will damage the control panel or battery, even worse will put lives at risk. Note：...
  • Page 80 R410A Mini Split Chiller 50Hz MCAC-UTSM-2014-01 Appendix Temperature-Resistance characteristic sheet. Unit： ℃--K Room temperature sensor \Pipe temperature sensor Table 115.266 12.6431 2.35774 0.62973 108.146 12.0561 2.27249 0.61148 101.517 11.5 2.19073 0.59386 96.3423 10.9731 2.11241 0.57683 89.5865 10.4736 2.03732 0.56038 84.219 1.96532 0.54448 79.311...

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