Midea MGRH5A-PA1Z Manual
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Midea MGRH5A-PA1Z Manual

R410a 50hz aqua mini full dc inverter unitary chiller
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Full DC Inverter Unitary Chiller
Applicable Model:
Midea reserves the right to discontinue, or change specification or designs at any time without notices and
without incurring obligations.
Midea R410A 50Hz
Aqua Mini
MGRH5A-PA1Z
MGRH7A-PA1Z
MGRH10A-PA1Z
MGRH12A-PA3Z
MGRH14A-PA3Z
MGRH16A-PA3Z
DM16-01.01.24en

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Summary of Contents for Midea MGRH5A-PA1Z

  • Page 1 DM16-01.01.24en Midea R410A 50Hz Aqua Mini Full DC Inverter Unitary Chiller Applicable Model: MGRH5A-PA1Z MGRH7A-PA1Z MGRH10A-PA1Z MGRH12A-PA3Z MGRH14A-PA3Z MGRH16A-PA3Z Midea reserves the right to discontinue, or change specification or designs at any time without notices and without incurring obligations.
  • Page 2 Aqua Mini Full DC Inverter Unitary Chiller 50Hz Content 1. Outdoor units lineup ............2 2.Features ................4 3. Description of main components ........8 4. Specifications ..............10 5. Dimensions ..............14 6. Piping Diagram ..............15 7. Wiring Diagram ............... 16 8.

  • Page 3: Outdoor Units Lineup

    Aqua Mini Full DC Inverter Unitary Chiller 50Hz 1. Outdoor units lineup MGRH5A-PA1Z, MGRH7A-PA1Z Power Supply Compressor Heat Hydraulic Model Capacity A/C mode Refrigerant (V/Ph/Hz) type exchanger module MGRH5A-PA1Z 220-240/1 /50 5.0kW DC Inverter Plate type Heat pump Built-in R410A...
  • Page 4 Aqua Mini Full DC Inverter Unitary Chiller 50Hz 2.Features 2.1 High efficient DC inverter compressor Full DC inverter mini chiller adopts highly intelligent inverter-driven compressor. This advanced technology enables the output of the outdoor unit to be modulated by the real heat load demands.. This advanced system ensures precise temperature regulation and highly efficient energy usage, making a significant contribution to limiting the impact on the environment.
  • Page 5 Aqua Mini Full DC Inverter Unitary Chiller 50Hz 2.4 High efficiency 3.39 3.31 3.21 3.23 3.20 3.11 10kW 12kW 14kW 16kW 3.30 3.31 3.24 3.25 10kW 12kW 14kW 16kW 2.5 Wide operation temperature range  Stable and safe running at wide ambient temperature range, cooling performance from -5 ˚C to 46˚C, heating from -15˚C to 27˚C.
  • Page 6 Aqua Mini Full DC Inverter Unitary Chiller 50Hz a. Metallic protective cabinet with rustproof polyester paint; b. Built-in with voltage protection, current protection, anti-freezing protection, water flow protection and etc., effectively guarantee the system to work safely. 2.7 User friendly remote control Switch SW4_1(10kW) or SW3_1(12-16kW) on the PCB to ON to enable the following remote control functions.
  • Page 7 Aqua Mini Full DC Inverter Unitary Chiller 50Hz Fast respond resulting in higher efficiency and improved reliability. 100% 2.11 Water pump starts/stops compulsory function Press “Check” button for 3 seconds to start the water pump operating when the unit is standby. Press “Check”...

  • Page 8: Description Of Main Components

    Aqua Mini Full DC Inverter Unitary Chiller 50Hz 3. Description of main components Structure Panels and base are made from galvanized steel plate painted with epoxy power to ensure total resistance to atmospheric pollution, condensate collection pan as standard. Condenser coils: The coils are made from high performance and seamless copper tuber and high surface area aluminum fins to ensure optimum heat exchange capability.
  • Page 9 Aqua Mini Full DC Inverter Unitary Chiller 50Hz 10~16KW 1 Operation panel 11 Electrical panel 2 Water manometer 12 High pressure switch 13 4-ways valve 3 Automatic discharge valve 4 Axial-flow fan 14 Expansion tank 5 Differential pressure switch 15 Pump 16 Low pressure switch 6 Condenser 7 Accumulater...

  • Page 10: Specifications

    Aqua Mini Full DC Inverter Unitary Chiller 50Hz 4. Specifications MGRH5A-PA1Z MGRH7A-PA1Z Model Power supply V-Ph-Hz 220-240, 1, 50 220-240, 1, 50 Capacity Cooling*(1) Input 1.55 2.25 Capacity 6.57 7.88 Cooling*(2) Input 1.27 1.84 Capacity Heating*(3) Input Capacity 6.32 8.29...
  • Page 11 Aqua Mini Full DC Inverter Unitary Chiller 50Hz 2. Heating: (*3) warm water inlet/outlet temperature: 40/45°C,outdoor ambient temperature 7°C DB/6°C WB . (*4) warm water inlet/outlet temperature: 30/35°C,outdoor ambient temperature 7°C DB/6°C WB . 3. It is tested 1m away in front of the unit in a semi-anechoic room(sound pressure). 4.
  • Page 12 Aqua Mini Full DC Inverter Unitary Chiller 50Hz 1. Cooling: (*1) chilled water inlet/outlet temperature: 12/7°C,outdoor ambient temperature 35°C DB. (*2) chilled water inlet/outlet temperature: 23/18°C,outdoor ambient temperature 35°C DB. 2. Heating: (*3) warm water inlet/outlet temperature: 40/45°C,outdoor ambient temperature 7°C DB/6°C WB . (*4) warm water inlet/outlet temperature: 30/35°C,outdoor ambient temperature 7°C DB/6°C WB .
  • Page 13 Aqua Mini Full DC Inverter Unitary Chiller 50Hz Note: Specifications are based on the following conditions: 1. Cooling: (*1) chilled water inlet/outlet temperature: 12/7°C,outdoor ambient temperature 35°C DB. (*2) chilled water inlet/outlet temperature: 23/18°C,outdoor ambient temperature 35°C DB. 2.Heating: (*3) warm water inlet/outlet temperature: 40/45°C,outdoor ambient temperature 7°C DB/6°C WB . (*4) warm water inlet/outlet temperature: 30/35°C,outdoor ambient temperature 7°C DB/6°C WB .
  • Page 14 Aqua Mini Full DC Inverter Unitary Chiller 50Hz 5. Dimensions MGRH5A-PA1Z, MGRH7A-PA1Z (Unit: mm) MGRH10A-PA1Z, MGRH12A-PA3Z, MGRH14A-PA3Z, MGRH16A-PA3Z (Unit : mm)

  • Page 15: Piping Diagram

    Aqua Mini Full DC Inverter Unitary Chiller 50Hz 6. Piping Diagram MGRH5A-PA1Z, MGRH7A-PA1Z HEAT PUMP 1 compressor 6 electronic expansive valve 11 accumulator 2 high pressure switch 7 liquid receiver 12 low pressure switch 3 4-way value(only HEAP PUMP) 8 plate heat exchanger...

  • Page 16: Wiring Diagram

    Aqua Mini Full DC Inverter Unitary Chiller 50Hz 7. Wiring Diagram MGRH5A-PA1Z, MGRH7A-PA1Z...
  • Page 17 Aqua Mini Full DC Inverter Unitary Chiller 50Hz MGRH10A-PA1Z...
  • Page 18 Aqua Mini Full DC Inverter Unitary Chiller 50Hz MGRH12A-PA3Z,MGRH14A-PA3Z, MGRH16A-PA3Z...

  • Page 19: Electric Characteristics

    Aqua Mini Full DC Inverter Unitary Chiller 50Hz 8. Electric Characteristics Outdoor Unit Power Supply Compressor Model Voltage Phase Min. Max. TOCA MGRH5A-PA1Z 50Hz 220~240V 198V 264V 10.1 14.6 29.5 0.195 1.65 MGRH7A-PA1Z 50Hz 220~240V 198V 264V 10.1 15.6 29.5 0.195...

  • Page 20: Capacity Tables

    Aqua Mini Full DC Inverter Unitary Chiller 50Hz 9. Capacity Tables MGRH5A-PA1Z Cooling Ambient temp.(℃) 21.00 25.00 30.00 35.00 40.00 46.00 Chilled water outlet temp. (℃) 5.00 5.60 1.37 4.10 5.27 1.41 3.75 4.97 1.45 3.43 4.70 1.50 3.14 4.40 1.57...
  • Page 21 Aqua Mini Full DC Inverter Unitary Chiller 50Hz MGRH7A-PA1Z Cooling Ambient temp.(℃) 21.00 25.00 30.00 35.00 40.00 46.00 Chilled water outlet temp. (℃) 5.00 7.84 1.98 3.95 7.38 2.04 3.61 6.96 2.11 3.31 6.58 2.17 3.03 6.17 2.28 2.70 5.67 2.39 2.37 6.00...
  • Page 22 Aqua Mini Full DC Inverter Unitary Chiller 50Hz MGRH10A-PA1Z Cooling Ambient temp.(℃) 21.00 25.00 30.00 35.00 40.00 46.00 Chilled water outlet temp. (℃) 5.00 11.20 2.60 4.31 10.54 2.68 3.94 9.95 2.76 3.60 9.40 2.85 3.30 8.81 2.99 2.95 8.10 3.14 2.58 6.00...
  • Page 23 Aqua Mini Full DC Inverter Unitary Chiller 50Hz MGRH12A-PA3Z Cooling Ambient temp.(℃) 21.00 25.00 30.00 35.00 40.00 46.00 Chilled water outlet temp. (℃) 5.00 12.54 2.98 4.21 11.81 3.07 3.85 11.14 3.16 3.52 10.53 3.26 3.23 9.86 3.42 2.88 9.08 3.60 2.52 6.00...
  • Page 24 Aqua Mini Full DC Inverter Unitary Chiller 50Hz Cooling MGRH14A-PA3Z Ambient temp.(℃) 21.00 25.00 30.00 35.00 40.00 46.00 Chilled water outlet temp. (℃) 5.00 13.99 3.43 4.07 13.18 3.54 3.72 12.43 3.65 3.41 11.75 3.76 3.12 11.01 3.95 2.79 10.13 4.15 2.44 6.00...
  • Page 25 Aqua Mini Full DC Inverter Unitary Chiller 50Hz MGRH16A-PA3Z Cooling Ambient temp.(℃) 21.00 25.00 30.00 35.00 40.00 46.00 Chilled water outlet temp. (℃) 5.00 16.23 3.99 4.07 15.29 4.11 3.72 14.42 4.24 3.40 13.63 4.37 3.12 12.77 4.59 2.78 11.75 4.82 2.44 6.00...

  • Page 26: Operation Limits

    Aqua Mini Full DC Inverter Unitary Chiller 50Hz 10. Operation Limits COOLING 4 5 7 DELIVERY WATER TEMPERATURE HEATING DELIVERY WATER TEMPERATURE a) Ethylene Glycol Solutions Water and ethylene glycol solutions used as a thermal vector in the place of water reduce the performance of the unit.

  • Page 27: Fouling Factors

    Aqua Mini Full DC Inverter Unitary Chiller 50Hz Note: During winter leaving the unit unused, please drain water out completely from unit if no anti-freeze were charged into pipeline, or keep power on (at standby or off status) and ensure that water is contained inside of unit.

  • Page 28: Water Pressure Drop

    Aqua Mini Full DC Inverter Unitary Chiller 50Hz 11. Water Pressure Drop MGRH5A-PA1Z, MGRH7A-PA1Z MGRH10A-PA1Z Heat exchanger pressure drop (water side) 研发提供...
  • Page 29 Aqua Mini Full DC Inverter Unitary Chiller 50Hz MGRH12A-PA3Z MGRH14A-PA3Z...
  • Page 30 Aqua Mini Full DC Inverter Unitary Chiller 50Hz MGRH16A-PA3Z...

  • Page 31: Sound Level

    12. Sound Level O u t d o o r U n i t M i c r o 1 . 4 m 1 . 0 m Model Noise level (dB(A)) MGRH5A-PA1Z MGRH7A-PA1Z MGRH10A-PA1Z MGRH12A-PA3Z MGRH14A-PA3Z MGRH16A-PA3Z Note: 1).High/low air flow of outdoor fan motor.

  • Page 32: Exploded View

    Aqua Mini Full DC Inverter Unitary Chiller 50Hz 13. Exploded View MGRH5A-PA1Z MGRH7A-PA1Z...
  • Page 33 Aqua Mini Full DC Inverter Unitary Chiller 50Hz 28.4 28.6 28.5 28.7 28.3 28.2 28.1 Part Name Quantity Part Name Quantity Welded parts of fixed plate Discharge temp sensor ass'y Welded part of support Liquid receiver ass'y 20.1 Bearing base Accumulator cylinder 20.2 Fixed plate of inlet pipe...
  • Page 34 Aqua Mini Full DC Inverter Unitary Chiller 50Hz MGRH10A-PA1Z...
  • Page 35 Aqua Mini Full DC Inverter Unitary Chiller 50Hz 25.6 25.9 25.1 25.7 25.2 25.3 25.8 25.4 25.5 Part Name Quantity Part Name Quantity Right-front plate ass'y Gas-liquid separator Four-way valve parts Differential pressure switch Four-way valve ass'y Hydraulic meter Pressure switch Display box ass'y Welded parts of base Outdoor electrical control box ass'y...
  • Page 36 Aqua Mini Full DC Inverter Unitary Chiller 50Hz MGRH12A-PA3Z, MGRH14A-PA3Z, MGRH16A-PA3Z...
  • Page 37 Aqua Mini Full DC Inverter Unitary Chiller 50Hz 25.4 25.9 25.1 25.5 25.2 25.3 25.6 25.10 25.8 25.7 25.11 Part Name Quantity Part Name Quantity Right-front plate ass'y Differential pressure switch Four-way valve parts Hydraulic meter Four-way valve ass'y Display box ass'y Pressure switch Outdoor electrical control box ass'y 25.1...

  • Page 38: Installation

    Aqua Mini Full DC Inverter Unitary Chiller 50Hz 14. Installation a) Installation of general information General warning These units have been designed to chilled and hot water and must be used in applications compatible with their performance characteristics; these appliances are designed for residential or similar applications. Incorrect installation, regulation and maintenance or improper use absolves the manufacturer from all liability, whether contractual or otherwise, for damage to people, animals or things.
  • Page 39 Aqua Mini Full DC Inverter Unitary Chiller 50Hz b) Installation of outdoor unit 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 40 Aqua Mini Full DC Inverter Unitary Chiller 50Hz Installation space (units: mm)  Since the gravity center of the unit is not at its physical center, so please be careful when lifting it with a sling.  Never hold the inlet of the outdoor unit to prevent it from deforming. ...
  • Page 41 A hydraulic safety valve shall be mounted in water system, which should open constantly. 1). Connecting drawing of pipeline system For MGRH5A-PA1Z & MGRH7A-PA1Z 1 Pressure gauge Installer connections Factory connections...
  • Page 42 Aqua Mini Full DC Inverter Unitary Chiller 50Hz If the installation requires a useful head higher than that obtained by installing a pump assembly and storage tank, it is recommended that an additional pump is installed on the unit. Provided the additional pump installed inside of unit, the pump must connected close to plate heat exchanger.
  • Page 43 If the system flow is more than the maximum unit flow rate, bypass the evaporator as shown in the diagram to obtain a lower evaporator flow rate. Minimum and maximum water flow rates Item Water flow rate(m Model Minimum Maximum MGRH5A-PA1Z 0.77 0.95 MGRH7A-PA1Z 1.08 1.32 MGRH10A-PA1Z 1.54 1.89...
  • Page 44 Aqua Mini Full DC Inverter Unitary Chiller 50Hz the chilled water system shuts down during summer. The lower temperature in a heating system is often the ambient temperature at fill conditions(for example, 50 F or 10℃). h). Water quality control When industrial water is used as chilled water, little furring may occur;...
  • Page 45 Aqua Mini Full DC Inverter Unitary Chiller 50Hz Size and position of connections For MGRH5A-PA1Z & MGRH7A-PA1Z model water inlet auto-water replenishing orifice security discharge water outlet Water outlet of plate heat exchanger Water Auto-water Security Model (mm) (mm) (mm)
  • Page 46 Aqua Mini Full DC Inverter Unitary Chiller 50Hz i). Electrical connection The unitary mini chillers leave the factory already wired, and require the installation of an omni polar 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 47 Aqua Mini Full DC Inverter Unitary Chiller 50Hz j) Electrical Power Connection 1) MGRH5A-PA1Z, MGRH7A-PA1Z Power Cable Power Supply Outdoor units Residual Current CIrcuit-breaker For the functional connection of the unit, bring the power supply cable to the electrical panel inside the unit...
  • Page 48 3) MGRH12A-PA3Z, MGRH14A-PA3Z, MGRH16A-PA3Z PUMP2 Remote alarm Remote shutdown Remote cooling/heating wire controller Residual Current Circuit-breaker AC 380-415V 50Hz Auxiliary Connection 1) MGRH5A-PA1Z, MGRH7A-PA1Z PUMP 2 BOI L ON/OFF 220~240 V 220~240 V AC CAN TACTOR Reserved Addtitiona l pum p Switch 1.“PUMP2”wiring terminal supplies ON/OFF signals only.
  • Page 49 Aqua Mini Full DC Inverter Unitary Chiller 50Hz 2) MGRH10A-PA1Z,MGRH12A-PA3Z, MGRH14A-PA3Z, MGRH16A-PA3Z a. Additional pump Main control board 220-240V 220-240V AC contactor Additional pump “PUMP2” terminal only provides passive switching signal. Additional water pump must be controlled by the AC contactor. b.
  • Page 50 ● Please use 3-core shielded wire to connect the wired controller and the shielding layer must be grounded. ● When connecting wired controller, outdoor unit control panel is mainly used for display which can check parameters and inquiry, can’t be used to set mode and temperature.. The Specification of Power: MGRH5A-PA1Z MGRH7A-PA1Z MGRH10A-PA1Z MGRH12A-PA3Z MGRH14A-PA3Z...

  • Page 51: Checking And Starting Up The Unit

    All electrical and hydraulic connections are tight and have been completed correctly. - Use grommet A for the electrical power cable and grommet B for the other external wires. To complete the electrical connections: MGRH5A-PA1Z model. - Remove the inspection panel by unscrewing the five screws. For example,...
  • Page 52 Aqua Mini Full DC Inverter Unitary Chiller 50Hz To access the control panel, open the door: -remove the screw 1 and screw 2; -lift the door 3.

  • Page 53: Running And Maintenance

    Aqua Mini Full DC Inverter Unitary Chiller 50Hz 16. Running and Maintenance a) Operating characteristics Set point in cooling mode (factory set) = 12°C, Hysteresis = 3°C. The compressor starts with water temperatures above 12°C. The compressor shuts down with water temperatures of less than 9°C. Set point in heating mode (factory set) = 40°C, Hysteresis = 4°C.

  • Page 54: Routine Maintenance

    Aqua Mini Full DC Inverter Unitary Chiller 50Hz Routine maintenance Never perform any cleaning operations before having disconnected the unit from the mains power supply. If the supply cord is damaged, it must be replaced by the manufacturer or its service agent or a similarly qualified manufacturer or its service agent or a similarly qualified.

  • Page 55: Shutting Down For Long Periods

    Aqua Mini Full DC Inverter Unitary Chiller 50Hz Prohibition The refrigerant circuit must not be filled with a refrigerant other than that indicated of specification. The use of a different refrigerant may cause serious damage to the compressor. Oxygen, acetylene or other inflammable or poisonous gases must never be used in the refrigerant circuit as they may cause explosion or poisoning.

  • Page 56: Standard Controller

    Aqua Mini Full DC Inverter Unitary Chiller 50Hz 17. Controller 17.1 Standard controller It is built-in with the chiller at the factory. The front panel of the device functions as the user interface and is used to perform all operations relating to the device.
  • Page 57 Aqua Mini Full DC Inverter Unitary Chiller 50Hz When freezing the keys, this icon will be constantly light. It will be off when unfreezing keys. Temperature unit icon When the control panel displays temperature, this icon will be constantly light. Current unit icon When the control panel displays current, this icon will be constantly light.
  • Page 58 Aqua Mini Full DC Inverter Unitary Chiller 50Hz ② At this moment, last 2 digits of the nixie tube display “01” which means the first group setting begins. Press “ ” to the next step. By this time, mode icon will flicker and press “ ”...
  • Page 59 Aqua Mini Full DC Inverter Unitary Chiller 50Hz simultaneously for 3s to unlock. 17.1.4 Factory Reset In main interface, long press “ ” for 3s, the unit will close and recovers to factory default mode. Display panel will display ”OFF”.
  • Page 60 Aqua Mini Full DC Inverter Unitary Chiller 50Hz 17.2 Optional wired controller (KJR-120F/BMK-E, KJR-120F1/BMK-E) Features a. Touch key operation; b. LCD displays operation parameters; c. Multiple timer; d. Real-time clock (battery life:5~8 years). 17.2.1 Overview MODE FUNCTIONS (Press for 3sec to (Press for 3sec to cancel timer) unlock)
  • Page 61 Aqua Mini Full DC Inverter Unitary Chiller 50Hz 2. Mode area: Indicate the main unit operating mode; details refer to its’ manual; 3. Setting temperature: 2 status can be displayed: 4. Timing ON/OFF indication : Indicate the timing information; details refers to page 10 of the manual;...
  • Page 62 Aqua Mini Full DC Inverter Unitary Chiller 50Hz 17.2.2 Operation instructions a. Turn On and Turn Off the main unit 1) Press the On/Off key to control On and Off status of the main unit. 2) Under Off status, press the On/Off key “ ”...
  • Page 63 Aqua Mini Full DC Inverter Unitary Chiller 50Hz 2) Setting water temperature: Method 1:Press the “▲” or “▼” to adjust the water temperature after the controller is powered on. Press “OK” key or wait for 7 seconds to confirm. Method 2:Setting water temperature in parameters function. Press “FUNCTIONS” key under main interface once to enter water temperature setting interface.
  • Page 64 Aqua Mini Full DC Inverter Unitary Chiller 50Hz WATER TEMP. TIMER MODE Press twice FUNCTIONS (Press for 3sec to (Press for 3sec to cancel timer) unlock) At this time the hour of the clock will flash, which means the current setting is the hour of Timer 1 “On”, press the “▲”...
  • Page 65 Aqua Mini Full DC Inverter Unitary Chiller 50Hz Example of Timing setting Main page Press “FUNCTIONS” key twice to enter hour setting interface of “Timer 1 On” Press the “▲” or “▼” key to set the hour number of “Timing 1 On” to be 07 Press “...
  • Page 66 Aqua Mini Full DC Inverter Unitary Chiller 50Hz d. Setting clock WATER TEMP. TIMER MODE Press 3 times FUNCTIONS (Press for 3sec to (Press for 3sec to cancel timer) unlock) Press the “FUNCTION” key 3 times to enter clock setting. The hour of the clock will flash, which means the current setting is the hour of the clock, press the “▲”...
  • Page 67 Aqua Mini Full DC Inverter Unitary Chiller 50Hz Force opening water pump WATER TEM P. TIMER MODE Press 5 times FUNCTIONS (Press for 3sec to (Press for 3sec to cancel timer) unlock) Press the “FUNCTIONS” key 5 times to force open the water pump. The water pump icon will flash. Press “...
  • Page 68 Aqua Mini Full DC Inverter Unitary Chiller 50Hz Check content when wired controller setting is 1: (The checking content is the same as the PCB’s checking.) Order Contents Running mode: 0-shutdown,1-Pump mode,2-Cooling,3-Heating,4-Forced cooling, 5-Forced heating. Fan speed:0-Shutdown,1~7-Fan speed. Total capacity requirements. The revised capacity requirements.

  • Page 69: Troubleshooting

    Aqua Mini Full DC Inverter Unitary Chiller 50Hz 18.Troubleshooting 18.1 PCB parts instructions MGRH5A-PA1Z, MGRH7A-PA1Z PFC&IPM panel 8  7  9  6  5  4  3  10  12  11  2  1  1. Input rectifier bridge port 1 2. Input rectifier bridge port 2 3.
  • Page 70 Aqua Mini Full DC Inverter Unitary Chiller 50Hz Main control panel 13  9  11  8  12  10  14  15  20  21  7    22  6  23    24  25  26  27    5  28  29  4  3  1. Power L 2.
  • Page 71 Aqua Mini Full DC Inverter Unitary Chiller 50Hz DC filter panel 1  2  3  5  4  1. IPM Power supply N 2. IPM Power supply P 3. PFC output power P 4. PFC output power N 5. DC 380V (DC fan power supply port)
  • Page 72 Aqua Mini Full DC Inverter Unitary Chiller 50Hz MGRH10A-PA1Z Main control panel 27  30  29  1  26  2    25  3  4    24  5.1  5.2  23  6    7.1  22  7.2  8  21  20  9  10  19  18  11  17 ...
  • Page 73 Aqua Mini Full DC Inverter Unitary Chiller 50Hz 15. Rectifier bridge input port N 16. Rectifier bridge input port L 17. 8A fuse tube 18. Solenoid valve port(Reserved) 19. Exhaust valve electric heater port 21. Plate heat exchanger electric heater 22.
  • Page 74 Aqua Mini Full DC Inverter Unitary Chiller 50Hz 1. +18V output port 2. Input Port P for IPM 3. Power supply port U of the compressor 4. Power supply port V of the compressor 5. Power supply port W of the compressor 6.
  • Page 75 Aqua Mini Full DC Inverter Unitary Chiller 50Hz 1. Input port for switching power supply 2. Debugging port 3. Connection port for operation and display panel 4. Tin/Tb1/Tout/Tb2 temperature sensor port Note: Tin: water inlet temperature Tout: water outlet temperature Tb1: Temperature 1 of plate heat exchanger Tb2: Temperature 2 of plate heat exchanger Discharged temperature sensor port (Tp)
  • Page 76 Aqua Mini Full DC Inverter Unitary Chiller 50Hz IPM module     8  7  6  5  4  3  +15V output port communication port to main control board IPM input port N Compressor connection port W Compressor connection port V Compressor connection port U IPM input P Power supply port for switching power supply...
  • Page 77 Aqua Mini Full DC Inverter Unitary Chiller 50Hz Filter board   11  1  10    9  2  8  3  7  6  Power supply port L3 Power supply port L2 Power input port L1 Power input port N Ground wire Loaded power supply port for main control board Power supply port for main control board Power output port L1 after filtering Power output port L2 after filtering...
  • Page 78 Aqua Mini Full DC Inverter Unitary Chiller 50Hz For 12-16kW 19.3. Query function for the built-in controller a. To enter parameter checking function Press “ ” and “ ” simultaneously for 3s to enter into the interface of parameter checking function. At this moment, first 2 digits of the digital tube will display sequence number and the last 2 digits is specific parameters.
  • Page 79 Aqua Mini Full DC Inverter Unitary Chiller 50Hz 10-16kW Content Note Clock displays when standby. Inlet water temperature displays when running. dF displays when defrosting. Pb displays when anti-freeze Normal display running. d0 displays when oil return, d8 displays when remote control is off.

  • Page 80: Error Code

    Aqua Mini Full DC Inverter Unitary Chiller 50Hz 18.4 Error code table 5/7kW Error Note Content Code EEPROM malfunction Communication malfunction between main chip and IPDU. T3,T4 sensor malfunction The same as Voltage protection malfunction 10-16kW DC fan motor malfunction A fan in the A region run for more than 5 minutes in heating mode There are two times E6 fault in 10 minutes (recovery after power off) Inlet water temperature sensor malfunction for 5/7kW models.
  • Page 81 Aqua Mini Full DC Inverter Unitary Chiller 50Hz 10-16kW Error Code Content Note EEPROM malfunction Communication malfunction between main chip and IPDU. T3,T4 sensor malfunction Voltage protection malfunction The same as 5/7kW DC fan motor malfunction A fan in the A region run for more than 5 minutes in heating mode There are two times E6 fault in 10 minutes (recovery after power off) Inlet water temperature sensor malfunction for 10~16kW models.
  • Page 82 Aqua Mini Full DC Inverter Unitary Chiller 50Hz E9 malfunction: EEPROM malfunction The malfunction may be caused by two reasons: 1) The EEPROM is not inserted well; 2) Outdoor main PCB is broken. LED displays E9 EEPROM malfunction Check whether EEPROM is installed properly. Installed properly again.
  • Page 83 Aqua Mini Full DC Inverter Unitary Chiller 50Hz E4 malfunction : T3,T4 sensor malfunction HH malfunction : Inlet water temperature sensor malfunction for 5/7kW models. C0 malfunction : Inlet water temperature sensor malfunction for 10-16kW models. EC malfunction: Outlet water temperature sensor malfunction for 5/7kW models. C1 malfunction: Outlet water temperature sensor malfunction for 10-16kW models.
  • Page 84 Aqua Mini Full DC Inverter Unitary Chiller 50Hz E6 malfunction: DC fan motor malfunction LED displays E6 Outdoor unit DC fan cannot work. Refers to the wiring diagram to check whether Connect again. the unit wiring is correct or not. Check the voltage Check whether the power and voltage of the DC between “+”,”-”...
  • Page 85 Aqua Mini Full DC Inverter Unitary Chiller 50Hz P1 malfunction: High pressure protection LED displays P1 High pressure protection Judge whether the wiring connection is correct. Connect again. Judge wire body is broken or not. To confirm: short-circuit high pressure switch and check whether Replace high pressure switch.
  • Page 86 Aqua Mini Full DC Inverter Unitary Chiller 50Hz P2: Low pressure protection LED displays P2 Low pressure protection Connect well again. Whether wiring connection between low pressure switch and PCB is connected well or properly. Whether the low pressure switch is damaged. Short-circuit low pressure switch and check whether the Replace low pressure switch .
  • Page 87 Aqua Mini Full DC Inverter Unitary Chiller 50Hz P3: Compressor current protection It will protect when input current is more than 22A(31A for 10-16kW ). It will recover when input current is less than 22A (31A for 10-16kW ). It will recover automatically. LED displays P3 Compressor current protection Check whether the input current of the power wire is more than 22A.
  • Page 88 Aqua Mini Full DC Inverter Unitary Chiller 50Hz P4: Compressor discharged temperature protection  When the discharged temperature of the compressor is higher than 115°C, the unit will stop running. When the discharged temperature of the compressor is lower than 83°C , the unit resumes normal operation automatically. LED displays P4 Discharged temperature protection of the compressor Check whether the discharged temperature of the compressor is higher than 115°C.
  • Page 89 Aqua Mini Full DC Inverter Unitary Chiller 50Hz P5: Condenser high temperature protection When condenser temperature is higher than 62 degrees, the unit will stop operating. When pipe temperature outside is lower than 52 degrees, the unit will resume operate. LED displays P5 Condenser high temperature protection Check whether condenser temperature is higher than 62...
  • Page 90 Aqua Mini Full DC Inverter Unitary Chiller 50Hz P6: IPM Module protection LED displays P6 IPM module protection Check whether the input power is Adjust to the right range. correct. The power is 220-240V, 1N, Then check whether the Check whether P-N voltage on the IPM module 50Hz.
  • Page 91 Aqua Mini Full DC Inverter Unitary Chiller 50Hz P8: Typhoon protection LED displays P8 Typhoon protection Check if strong wind blows outdoor unit or two Stop the unit to prevent strong wind outdoor units blows each other. to blow the outdoor fan. Replace the outdoor main PCB Check whether the fan motor is damaged.
  • Page 92 Aqua Mini Full DC Inverter Unitary Chiller 50Hz Note: when the ambient temperature is less than 8℃, inlet water temperature and temperature of plate heat exchanger is less than 2℃, crankcase heater of plate works. CP appears. If inlet water temperature and temperature of plate heat exchanger is more than 7℃, crankcase heater stops working and CP code disappears.
  • Page 93 Aqua Mini Full DC Inverter Unitary Chiller 50Hz C8 malfunction: System water flow protection CP malfunction: Anti-idling protection for water pump LED displays C8/CP System water flow protection or anti-idling protection for water pump Repair the leaks and add the water again. Whether system water flow leaks.

  • Page 94: Optional Accessories

    Aqua Mini Full DC Inverter Unitary Chiller 50Hz 19. Optional Accessories Remark Name Specification Wired controller KJR-120F/BMK-E (with Midea logo) Customized Wired controller KJR-120F1/BMK-E (without Midea logo) Customized...
  • Page 95 Aqua Mini Full DC Inverter Unitary Chiller 50Hz Appendix Accessories Item Name of accessory Shape Installation and operation manual Rubber sealed ring Outlet connection pipe Straight screwdriver -----...
  • Page 96 Aqua Mini Full DC Inverter Unitary Chiller 50Hz Temperature-Resistance characteristic sheet for pipe temperature sensor， ambient temperature sensor，inlet water temperature sensor and outlet water temperature sensor. Unit：Temp:℃--K, Ratio:KΩ Sensor characteristic sheet Temp. Ratio Temp. Ratio Temp. Ratio Temp. Ratio 115.266 12.6431 2.35774 0.62973...

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