Midea SMK-D140HHN1-3 Service Manual
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Midea SMK-D140HHN1-3 Service Manual

Midea SMK-D140HHN1-3 Service Manual

High temperature hydro module
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High Temperature Hydro Module
SMK-D140HHN1-3

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Summary of Contents for Midea SMK-D140HHN1-3

  • Page 1 R410A Commercial Air Conditioners Service Manual High Temperature Hydro Module SMK-D140HHN1-3...
  • Page 3 High Temperature Hydro Module CONTENTS 1 External Appearance .................. 3 2 Nomenclature .................... 3 3 System Schematic ..................4 4 Specifications ..................... 5 5 Electric Control Box Layout ................ 6 6 Working Range ..................11 7 Refrigerant Flow Diagrams ............... 12 8 High Temperature Hydraulic Module Control Logic........
  • Page 4 High Temperature Hydro Module 202003...
  • Page 5 High Temperature Hydro Module 1 External Appearance Figure 1.1: Appearance 2 Nomenclature 202003...

  • Page 6: System Schematic

    High Temperature Hydro Module 3 System Schematic Figure 3.1: Hydraulic box connection method 202003...

  • Page 7: Specifications

    High Temperature Hydro Module 4 Specifications SMK- D140HHN1-3 Power supply 1P~ 220-240V 50/60Hz Heating Capacity 7/6℃ OAT WIT: 40 / WOT: 45 ºC Working range heating HEAT -20℃~30℃ -20℃~43℃ ambient temperature range 0℃~40℃ sound pressure level water flow rate nominal m³/h m³/h m³/h...
  • Page 8 High Temperature Hydro Module 5 Electric Control Box Layout 202003...
  • Page 9 High Temperature Hydro Module 5.1 Main PCB NO. Port code Port Content Port voltage code X1X2 CN15 Port for communication with wired controller 0 or 18VDC N1N2 Port for signal of free electricity 0 or 12VDC M1M2 Port for signal of valley electricity 0 or 12VDC CN17 Port for communication with outdoor unit...
  • Page 10 High Temperature Hydro Module Port code Port Content Port voltage code CN23 Reserved CN24 Pot for fan 220V AC Port for communication with PC 2.5-2.7VDC Port for water flow switch 0 or 12VD Twin Port for outlet water temperature sensor 0-5V DC(varying) Twout Port for inlet water temperature sensor...

  • Page 11: Inverter Module

    High Temperature Hydro Module Inverter Module Port Port Content Port voltage code code Compressor connection port U 380V AC Compressor connection port V 380V AC Compressor connection port W 380V AC CN502 Power supply port for inverter PCB (L) 310V AC CN501 Power supply port for inverter PCB (N) 310V AC...

  • Page 12: Installation Cables

    High Temperature Hydro Module Installation Cables 202003...

  • Page 13: Working Range

    High Temperature Hydro Module 6 Working Range Heating Mode water outlet temperature /℃ continuous heating warm-up operation range DHW Mode water outlet temperature /℃ continuous heating warm-up operation range main cooling operation range 202003...

  • Page 14: Refrigerant Flow Diagrams

    High Temperature Hydro Module 7 Refrigerant Flow Diagrams ONLY HEATING Indoor heating + Hydro box Or only Hydro box 202003...
  • Page 15 High Temperature Hydro Module MAIN HEATING (Outdoor heat exchanger works as evaporator） Indoor units in cooling mode +Hydro box Indoor units in cooling/heating + Hydro box 202003...
  • Page 16 High Temperature Hydro Module MAIN COOLING (Outdoor heat exchanger works as evaporator） Indoor units in cooling mode +Hydro box Indoor units in cooling/heating + Hydro box 202003...
  • Page 17 High Temperature Hydro Module HEAT RECOVERY (Free to provide hot water) All indoor units in cooling mode + Hydro box 202003...
  • Page 18 High Temperature Hydro Module 8 High Temperature Hydraulic Module Control Logic 8.1 Start/Stop/ Mode Change 202003...
  • Page 19 High Temperature Hydro Module 8.2 High Temperature Hydraulic Module Control Principle 8.2.1 Compressor Control The compressor frequency is calculated according to the deviation between Tc and Tcs. Tc: Measured high pressure saturation temperature Tcs: Target high pressure saturation temperature 8.2.2 EXV1 Control EXV1 opening degree is calculated according to the deviation of DSH= T7C-Tc from the DSHS DSH=T7C-Tc: measured discharge superheat DSHS: Target discharge superheat...
  • Page 20 High Temperature Hydro Module 8.2.4 Frequency Limit and Protection Control High Pressure limits the frequency 202003...
  • Page 21 High Temperature Hydro Module Low Pressure limits the frequency 202003...
  • Page 22 High Temperature Hydro Module Discharge Temperature Limits the frequency protection 202003...
  • Page 23 High Temperature Hydro Module Compressor current limits the frequency protection 202003...
  • Page 24 High Temperature Hydro Module Inverter module temperature limits the frequency protection 202003...
  • Page 25 High Temperature Hydro Module 9 Appearance of the Wired Controller 202003...

  • Page 26: Status Icons

    High Temperature Hydro Module 10 Status Icons 202003...
  • Page 27 High Temperature Hydro Module 11 Using Home Pages The hydraulic module features the heating function and water heating function, which can be classified into the hydraulic module that supports heat mode only (''FOR SERVICEMAN'' > ''Heat mode setting'' > ''HEAT MODE=YES'' and ''FOR SERVICEMAN'' >...
  • Page 28 High Temperature Hydro Module 11.1 Scenario 1 Only heating mode is available and the hydraulic module is operating in water outlet temperature control mode. (For more information, please read the Engineering Data Book.) 202003...
  • Page 29 High Temperature Hydro Module 11.2 Scenario 2 Only heating mode is available and the hydraulic module operates in water outlet room control mode. (For more information, please read the Engineering Data Book.) Note: The wired controller must be installed indoors, where heating is required. The wired controller is equipped with a temperature sensor for detecting room temperature.
  • Page 30 High Temperature Hydro Module 11.3 Scenario 3 Only heating mode is available. (For more information, please read the Engineering Data Book) 202003...
  • Page 31 High Temperature Hydro Module 11.4 Scenario 4 Both heating mode and DHW mode are available. (For more information, please read the Engineering Data Book) 202003...
  • Page 32 High Temperature Hydro Module 11.5 Scenario 5 Only heating mode is available and there are multiple set points for the heating mode. (For more information, please read the Engineering Data and see ''Multiple Set Points'' on Page XX in this document.) The settings of multiple set points do not affect the main interface.
  • Page 33 High Temperature Hydro Module 11.6 Scenario 6 Group control of the hydraulic module. When multiple hydraulic modules heat water in one water tank, the group control function of the hydraulic module should be used. (For more information, please read the Engineering Data.) The group control function is only valid for the DHW mode. Notes: 1.
  • Page 34 High Temperature Hydro Module To enable the group control function, you need to set the DIP switch on the main board as follows: for the master hydraulic module, turn digit 11; for the slave hydraulic module, turn digit 10: To enable the group control function, you need to set the DIP switch on the main board as follows: for the master hydraulic module, turn digit 11;...

  • Page 35: Basic Application

    High Temperature Hydro Module 12 Basic Application 12.1 Unlocking the screen If the icon is displayed on the screen, it indicates that the wired controller has been locked. If you press any key, the icon blinks. Press and hold the UNLOCK key, the icon will disappear.
  • Page 36 High Temperature Hydro Module 12.2 Enabling/Disabling Mode and Setting Temperature Both heat mode and DHW mode can be enabled and disabled through the wired controller 12.2.1 Heat Mode There are two control methods for the heat mode: • Water outlet temperature control •...
  • Page 37 High Temperature Hydro Module 202003...
  • Page 38 High Temperature Hydro Module Room Temperature Control In room temperature control mode, set the desired room temperature. The hydraulic module will control the operating of the hydraulic module according to the room temperature collected by the wired controller. The desired room temperature can be set manually, or through the timer function and weather temperature curve.
  • Page 39 High Temperature Hydro Module Assume that the temperature adjustment function in heat mode or mode on/off function are locked on the wired controller. If you adjust temperature or enable/disable a mode, the following interface is displayed: If you press NO, you will return to the main interface. If you press YES, you will enter the CHILD LOCK interface. 202003...
  • Page 40 High Temperature Hydro Module If temperature adjustment function or mode on/off function are locked on the centralized controller, the icon on the top will be lit. If you adjust temperature or enable/disable a mode on the wired controller, the following interface is displayed: In this case, the hydraulic module can be only unlocked on the centralized controller.
  • Page 41 High Temperature Hydro Module 12.2.2 DHW Mode • Take the following steps to set the DHW mode: MENU > FOR SERVICEMAN > DHW MODE. • Set DHW MODE to YES. • The water tank temperature ranges from 25°C to 80°C. Press ON/OFF to turn on/off heat mode.
  • Page 42 High Temperature Hydro Module If temperature adjustment function or mode on/off function are locked on the centralized controller, the icon on the top will be lit. If you adjust temperature or enable/disable a mode on the wired controller, the following interface is displayed: In this case, the hydraulic module can be only unlocked on the centralized controller.

  • Page 43: Heat Mode

    High Temperature Hydro Module 13 Functions 13.1 Heat Mode In heat mode, PRESET TEMP.\WEATHER TEMP. SET\MULTIPLE SET POINT are available. 13.1.1 Pre-set Temperature In heat mode, PRESET TEMP.\WEATHER TEMP. SET\MULTIPLE SET POINT are available. • PRESET TEMP. =PRESET TEMPERATURE • The PRESET TEMP.
  • Page 44 High Temperature Hydro Module For example: The time is 8:00 and temperature is 60℃. If PRESET TEMP. is set as follows, the hydraulic module will operate according to the following curve.  Notes for installers and service engineers Important Notes ...
  • Page 45 High Temperature Hydro Module 13.1.2 Weather Temperature Set • WEATHER TEMP. SET=WEATHER TEMPERATURE • On the WEATHER TEMP.SET page, you cannot set the desired water outlet temperature. The desired water outlet temperature is calculated according to the outside ambient temperature. The higher the outside ambient temperature, the lower the desired water temperature.
  • Page 46 High Temperature Hydro Module H_weather_Twout Shift value L_weather_Twout L_ODU_T4 H_ODU_T4 H_ODU_T4: high outdoor temperature (indicates the high temperature point among outdoor ambient temperature) L_ODU_T4: low outdoor temperature (indicates the low temperature point among outdoor ambient temperature) L_weather_Twout: the desired leaving water temperature when the outdoor temperature equals or drops below the low ambient temperature (indicates that the desired water outlet temperature is lower than the low temperature point of the outdoor ambient temperature) H_weather_Twout: the desired leaving water temperature when the outdoor temperature equals or rises above the high...
  • Page 47 High Temperature Hydro Module 13.1.3 Multiple Set Point Function When the hydraulic module is connected to multiple terminals that raise different water temperature requirements, you need to use the multiple set point function. The multiple set point function is used to set the desired water outlet temperature of space1 and space2.
  • Page 48 High Temperature Hydro Module Desired Thermo status (energy demand status) temperature space 0 space 1 ON/OFF space 2 ON/OFF ON/OFF Resulting desired temp. 202003...
  • Page 49 High Temperature Hydro Module 13.2 Domestic Hot Water DOMESTIC HOT WATER (DHW) has DISINFECT/DHW PUMP 2 items. 13.2.1 Disinfection Mode In disinfection mode, legionella bacteria can be killed. In disinfection mode, the water tank temperature will forcedly rise to 70℃ to 80℃. The disinfection temperature can be set on the FOR SERVICEMAN interface Choose MENU >...
  • Page 50 High Temperature Hydro Module Use ‘’◄‘’, ‘’►‘’, ‘’▼‘’, ‘’▲‘’ to scroll and use ‘’▼‘’, ''▲'' to adjust the parameters when setting ''OPERATE DAY'' and ''START''. If the OPERATE DAY is set to FRIDAY and the START is set 23:00, the disinfect function will activate at 23:00 on Friday. If the disinfect function is running, the following page will appear Note: When the hydraulic module operates in disinfection mode, if you press the On/Off key, the pressing is invalid and the...
  • Page 51 High Temperature Hydro Module 13.2.2 DHW Pump The DHW PUMP function is used to control the start time of the water tank and pump so that hot water can flow out of the tap at any time. Choose MENU > DOMESTIC HOT WATER > DHW PUMP. Press OK. The following interface is displayed. Use ''◄'’, ''►'’, ''▼'', ''▲'' to scroll and use ''▼'', ''▲'‘...
  • Page 52 High Temperature Hydro Module For example: You have set the parameter about the DHW PUMP (See ''FOR SERVICEMAN'‘ > ''DHW MODE SETTING'' on ''Engineering Data''). PUMP RUNNING TIME is 30 minutes. Set as follows: START 06:00 07:00 8:00 09:00  Notes for installers and service engineers Important Notes ...
  • Page 53 High Temperature Hydro Module 13.3 Schedule Function The SCHEDULE menu contains the following items: 1) TIMER 2) WEEKLY SCHEDULE 3) SCHEDULE CHECK 4) CANCEL TIMER 13.3.1 TIMER Function If the timer function is enabled, the icon will be displayed on the main interface of the wired controller. If the weekly schedule function is enabled, the timer function will be disabled.
  • Page 54 High Temperature Hydro Module For example: Six groups of schedules are set, as shown in the following table: START MODE TEMP. 01:00 03:00 07:00 09:00 HEAT 11:30 13:00 14:00 16:00 HEAT 15:00 19:00 18:00 23:30 HEAT The hydraulic module will operate as shown in the following figure: HEAT 01:00 03:00...
  • Page 55 High Temperature Hydro Module 13.3.2 Weekly Schedule Timer and weekly schedule cannot take effect at the same time. The time which is set later will take effect first. If the weekly schedule is set, the icon will be displayed on the main interface. Choose MENU >...
  • Page 56 High Temperature Hydro Module 13.3.3 Schedule Check Schedule check can only check the weekly schedule. Go to ''MENU'' > ''SCHEDULE'' >''SCHEDULE' CHECK''. Press ''OK''. The following page will appear: Press ''▼'', ''▲'', the timer from Monday to Sunday will appear. 13.3.4 Cancel Timer Go to ''MENU'' >...
  • Page 57 High Temperature Hydro Module You have to reset TIMER/WEEKLY SCHEDULE, if you change the LEAVING WATER TEMP. to the ROOM TEMP. or you change the ROOM TEMP. to the LEAVING WATER TEMP. 202003...
  • Page 58 High Temperature Hydro Module 13.4 Options OPTIONS menu contents as follows: 1) SILENT MODE 2) HOLIDAY AWAY 3) HOLIDAY HOME 13.4.1 Silent Mode The silent mode is used to reduce the noise of the hydraulic module, which may degrade the capability of the hydraulic module. You can set the hydraulic module to always operate in silent mode or to enter silent mode within a period of time.
  • Page 59 High Temperature Hydro Module 13.4.2 Holiday Away If the holiday away mode is enabled, the icon will be displayed on the main interface. The holiday away mode can prevent water from freezing during holidays and start heating and water heating before you are back home thus guaranteeing comfort and hit water at home.
  • Page 60 High Temperature Hydro Module SETTING VALUE HOLIDAY AWAY DHW MODE DISINFECT HEAT MODE FROM 02-01-2019 UNTIL 16-01-2019 When DISINFECT is set to ON, and you set the disinfection mode, the hydraulic module will automatically perform disinfection at the set disinfection time prior to the end of the holiday. For example, if FROM=2019-01-02, UNTIL=2019-01- 16, and disinfection time is set to 23:00 on Friday, disinfection begins from 23:00 on 2015-12-11.
  • Page 61 High Temperature Hydro Module 13.4.3 HOLIDAY HOME Mode In holiday home mode, the hydraulic module can operate according to the schedule settings of the holiday mode without affecting the normal schedule. Period Then… Before and after your holiday Your normal schedules will be used. During your holiday The configured holiday setting will be used.
  • Page 62 High Temperature Hydro Module  Notes for installers and service engineers Important Points  If both HOLIDAY AWAY and HOLIDAY HOME are set to ON, FROM and UNTIL set on the HOLIDAY AWAY page cannot coincide or overlap with those set on the HOLIDAY HOME page. If they coincide or overlap, the following page is displayed: 202003...

  • Page 63: Child Lock

    High Temperature Hydro Module 13.5 Child Lock The CHILD Lock function is used to prevent children error operation. The mode setting and temperature adjusting can be locked or unlocked by using CHILD LOCK function. Go to'' MENU'' > ''CHILD LOCK''. The page is displayed: Input the correct password, and the following page will appear: Use ''▼'' and ''▲'' to scroll and'' ON/OFF'' to select LOCK or UNLOCK.
  • Page 64 High Temperature Hydro Module If you press NO, you will return to the home page. If you press YES, you will go to the CHILD LCOK page. 202003...

  • Page 65: Service Information

    High Temperature Hydro Module 13.6 Service Information 13.6.1 About Service Information Service information menu contents are as follows: 1) SERVICE CALL 2) ERROR CODE 3) PARAMETER 4) DISPLAY 13.6.2 How to go to Service Information Menu Go to ''MENU'' > ''SERVICE INFORMATION''. Press ''OK'' . The following page will appear: The service call can show the service phone or mobile number.
  • Page 66 High Temperature Hydro Module Press OK and the following page will appear: Press OK to show the mean of the error code： NOTE: A total of twenty fault codes can be recorded. The parameter function is used to display the main parameter, and there are two pages to show the parameter: 202003...
  • Page 67 High Temperature Hydro Module The display function is used to set the interface: Use ''OK'' to enter and use ''◄'', ''►'', ''▼'', ''▲'' to scroll. 202003...

  • Page 68: Operation Parameters

    High Temperature Hydro Module 13.7 Operation Parameters Spot check the operating parameters of the hydraulic module and some operating parameters of the ODU. This menu is for installer or service engineer reviewing the operation parameter of hydro box and ODU units. •...
  • Page 69 High Temperature Hydro Module The parameters of high temperature hydraulic module are as follows: 202003...
  • Page 70 High Temperature Hydro Module The parameters of ODU units are as follows: 202003...
  • Page 71 High Temperature Hydro Module Parameter Meaning OPERATION MODE Operating Mode CURRENT Current COMPRESSOR FREQUENCY Compressor frequency COMP. RUN TIME 1 Compressor operating time COMP. RUN TIME 2 COMP. RUN TIME 3 COMP. RUN TIME 4 EXPANSION VALVE 1 EXV1 openness EXPANSION VALVE 2 EXV2 openness TWOUT...
  • Page 72 High Temperature Hydro Module 13.8 User Settings Code Description Default Min. Max. Adjustment Unit Value Value Value Step Water outlet temperature of ° C TwoutS heating mode set on the main interface Room temperature of heating ° C mode set on the main interface TtankS Water tank temperature of...
  • Page 73 High Temperature Hydro Module PRESET TEMP. TIME6 PRESET TEMP. time 6 00:00 00:00 23:50 1/10 h/min Temper.6 PRESET TEMP. 6 ° C weather temp. set Temperature setting curve on/off: OFF = 0, ON = 1 shift value Temperature setting curve °...
  • Page 74 High Temperature Hydro Module HOLIDAY AWAY DHW Holiday away DHW mode MODE on/off: 0 = Off，1 = On HOLIDAY AWAY Holiday away disinfection DISINFECT mode on/off: 0 = Off，1 = On Holiday away heat mode HOLIDAY AWAY HEAT MODE on/off: 0 = Off，1 = On HOLIDAY AWAY Holiday away start date Current...
  • Page 75 High Temperature Hydro Module 13.9 On- Site FOR SERVICEMAN Settings 13.9.1 About FOR SERVICEMAN FOR SERVICEMAN is used for installers and service engineers. • Setting the function of equipment. • Setting the parameters. 13.9.2 How to go to “FOR SERVICEMAN” Go to ''MENU'' >...
  • Page 76 High Temperature Hydro Module 13.9.4 Meanings of each setting item Code Description Defaul Min. Max. Adjustme Unit Value Value nt Step Value DHW MODE DHW MODE DHW mode on/off: 0 = SETTING NON， 1 = YES DISINFECT MODE Disinfection on/off: 0 = NON，...
  • Page 77 High Temperature Hydro Module MULTIPLE multiple set point 1 Multiple set point 1 on/off: SET POINT 0 = OFF, 1 = YES SETTING multiple set point 2 Multiple set point 2 on/off: 0 = OFF, 1 = YES HOLIDAY TwoutS_H.A_H Water outlet temperature °...
  • Page 78 High Temperature Hydro Module 13.9.5 Setting of Special Functions Maximum Power Limitation Function This function can limit the power consumption of the hydraulic module. Choose MENU > FOR SERVICEMAN > POWER INPUT LIMITATION. Press OK. The following interface is displayed. Select speed.
  • Page 79 High Temperature Hydro Module 14 Menu Structure Overview 14.1 Structure 202003...

  • Page 80: Maintenance

    High Temperature Hydro Module 15 Maintenance Note: Before repair and maintenance, ensure that the hydraulic module is powered off. ● Water pressure Check if the water pressure is above 0.3 bar. Add water if necessary. ● Water filter Clean the water filter. ●...

  • Page 81: Error Code Table

    High Temperature Hydro Module 16 Error Code Table Error Code Item EPROM failure Undefined address of hydraulic module Protection against excessively high temperature of the inverter module Unmatched compressor model Report error H4 after 3 x L0 or L1 failure is displayed. Low pressure protection (Unrecoverable) Discharge temperature protection (Unrecoverable) EXV1 R134A electronic expansion valve failure...
  • Page 82 High Temperature Hydro Module 17 Accessories Installation Manual User Manual Connecting pipe Connected to the water- assembly outlet pipe side (Including safety valve) Water discharge hose Connected to the outlet of the drainage pan Wired controller To control the unit Water temperature For detecting water tank sensor...
  • Page 83 Ver. 2020-03 Commercial Air Conditioner Division Midea Group Add.: Midea Headquarters Building, 6 Midea Avenue, Shunde, Foshan, Guangdong, China Postal code: 528311 Tel: +86-757-26338346; Fax: +86-757-22390205 cac.midea.com / global.midea.com Note: Product specifications change from time to time as product improvements and developments are released and may vary from those in this...

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