Kaysun KEM-30 DRS4 Engineering Data Book
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Kaysun KEM-30 DRS4 Engineering Data Book

Dc inverter air-cooled modular chiller
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ENGINEERING DATA BOOK
DC Inverter Air-cooled Modular Chiller
KEM-30 DRS4
KEM-60 DRS4
KEM-30 DRS4 KH
KEM-60 DRS4 KH

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Summary of Contents for Kaysun KEM-30 DRS4

  • Page 1 ENGINEERING DATA BOOK DC Inverter Air-cooled Modular Chiller KEM-30 DRS4 KEM-30 DRS4 KH KEM-60 DRS4 KEM-60 DRS4 KH...
  • Page 3 DC Inverter Chiller CONTENTS Part 1 General Information ................2 Part 2 Engineering Data ................. 14 Part 3 Installation and Field Settings .............. 37...

  • Page 4: Table Of Contents

    DC Inverter Chiller Part 1 General Information Aqua Tempo Super II System ..............3 Unit Capacities ..................4 Unit Combinations ................5 System and Design Unit Selection ............6 Typical Applications ................8...

  • Page 5: Aqua Tempo Super Ii System

    DC Inverter Chiller 1 Aqua Tempo Super II System 1.1 System Schematic Figure 1-1.1: System schematic Expansion tank Water replenishment valve Water discharge valve Master unit Y-type filter, unit requiring≥ 16 mesh Differential pressure by-pass valve unit Drain valve Slave unit Two-way valve Max 16 units Max 4 units...

  • Page 6: Unit Capacities

    DC Inverter Chiller 2 Unit Capacities Table 1-2.1: Aqua Tempo Super II unit capacity range and unit appearances Capacity 30kW 60kW KEM-30 DRS4 KEM-60 DRS4 Model KEM-30 DRS4 KH KEM-60 DRS4 KH Appearance Power supply 380-415V/3Ph/50Hz...

  • Page 7: Unit Combinations

    DC Inverter Chiller 3 Unit Combinations Table 1-4.1: Unit Combinations Modules System Capacity (kW) Numbers of units 30kW 60kW           ...

  • Page 8: System And Design Unit Selection

    DC Inverter Chiller 4 System and Design Unit Selection 4.1 Selection Procedure Step 1: Total heat load calculation Calculate conditioned surface area Select the heat emitters (type, quantity, water temperature and heat load) Step 2: System configuration Decide whether to enable or disable auxiliary electric heater Step 3: Selection of outdoor units Determine required total heat load on outdoor units Set capacity safety factor...
  • Page 9 DC Inverter Chiller 4.2 Aqua Tempo Super II Leaving Water Temperature (LWT) Selection The recommended design LTW ranges for different types of heat emitter are:  For floor heating: 30 to 35⁰C  For fan coil units: 30 to 45⁰C ...

  • Page 10: Typical Applications

    DC Inverter Chiller 5 Typical Applications 5.1 Space Heating Through Floor Heating Loops Floor heating Loops are used for spaces heating. Figure 1-6.1: Space heating through floor heating loops (standard unit without hydronic module) Expansion tank Water replenishment valve Water discharge valve Master unit Y-type filter, unit...
  • Page 11 DC Inverter Chiller Figure 1-6.2: Space heating through floor heating loops (customized unit with built-in hydronic module) Expansion tank Expansion tank Water replenishment valve Water replenishment valve Water discharge valve Water discharge valve Master unit Master unit Y-type filter, Y-type filter, One-way One-way requiring≥...
  • Page 12 DC Inverter Chiller 5.2 Space Heating and Space Cooling Through Fan Coil Unit Fan coil units are used for space heating and cooling. Figure 1-6.3: Space heating and space cooling through fan coil unit (standard unit without hydronic module) Expansion tank Water replenishment valve Water discharge valve Master unit...
  • Page 13 DC Inverter Chiller Figure 1-6.4: Space heating and space cooling through fan coil unit (customized unit with built-in hydronic module) Expansion tank Water replenishment valve Water discharge valve Master unit Y-type filter, One-way requiring≥ 16 mesh unit valve Two-way Differential pressure valve by-pass valve One-way...
  • Page 14 DC Inverter Chiller 5.3 Space Heating Through Floor Heating Loops And Space Cooling Through Fan Coil Unit Floor heating loops and fan coil units are used for space heating and fan coil units are used for space cooling. In space cooling mode, the 2-way valve is closed to prevent cold water entering the floor heating loops.
  • Page 15 DC Inverter Chiller Figure 1-6.6: Space heating through floor heating loops and space cooling through fan coil unit (customized unit with built-in hydronic module) Expansion tank Water replenishment valve Water discharge valve Master unit Y-type filter, One-way requiring≥ 16 mesh unit valve Two-way...
  • Page 16 DC Inverter Chiller Part 2 Engineering Data Specifications ..................15 Dimensions and Center of Gravity ............18 Piping Diagrams .................. 20 Wiring Diagrams ................. 24 Capacity Tables ................... 26 Operating Limits ................. 28 Hydronic Performance ................ 29 Sound Levels ..................31 Accessories ..................

  • Page 17: Specifications

    DC Inverter Chiller 1 Specifications Table 2-1.1: Specifications Model name KEM-30 DRS4 KEM-60 DRS4 Power supply V/Ph/Hz 380-415/3/50 Capacity 27.5 Rated input 10.3 21.5 Cooling 2.67 2.55 SEER 4.62 Capacity Rated input Heating SCOP 4.24 3.86 Seasonal space heating energy efficiency class Max.
  • Page 18 DC Inverter Chiller Table 2-1.2: Specifications Model name KEM-30 DRS4 KH KEM-60 DRS4 KH Power supply V/Ph/Hz 380-415/3/50 Capacity 27.5 Rated input Cooling 2.39 SEER 4.25 4.03 Capacity Rated input 10.7 21.5 Heating 2.99 2.88 SCOP 3.99 3.72 Seasonal space heating energy efficiency class Max.
  • Page 19 DC Inverter Chiller Table 2-1.2: Specifications(continued) Volume Expansion tank Precharge pressure 0.15 0.15 Test pressure Water flow switch Action flow 3.6± 10% 7± 10% Vent Valve Max working pressure Safety valve Action pressure 0.6 ± 10% 0.6 ± 10% Controller KCCHT-05 MODBUS KCCHT-05 MODBUS Cooling...

  • Page 20: Dimensions And Center Of Gravity

    DC Inverter Chiller 2 Dimensions and Center of Gravity KEM-30 DRS4, KEM-30 DRS4 KH Figure 2-2.1: KEM-30 DRS4, KEM-30 DRS4 KH dimensions and center of gravity (unit: mm) 1870 barycenter barycenter Left view Front view Hole for anchor bolt Φ Ø15...
  • Page 21 DC Inverter Chiller KEM-60 DRS4, KEM-60 DRS4 KH Figure 2-2.2: KEM-60 DRS4, KEM-60 DRS4 KH dimensions and center of gravity (unit: mm) Left view Front view 1105 Front view Hole for anchor bolt Φ Ø15 Electric control box side 2220 Top view Bottom view...

  • Page 22: Piping Diagrams

    DC Inverter Chiller 3 Piping Diagrams KEM-30 DRS4 Figure 2-3.1: KEM-30 DRS4 piping diagram inlet outlet Legend DC inverter compressor Stop valve Crankcase heater Safety valve DC inverter compressor discharge temperature sensor 1 Vapor-liquid separator DC inverter compressor discharge temperature sensor 2...
  • Page 23 DC Inverter Chiller KEM-30 DRS4 KH Figure 2-3.2: KEM-30 DRS4 KH piping diagram inlet outlet Legend DC inverter compressor Safety valve Crankcase heater Vapor-liquid separator DC inverter compressor discharge temperature sensor 1 Suction temperature sensor DC inverter compressor discharge temperature sensor 2...
  • Page 24 DC Inverter Chiller KEM-60 DRS4 Figure 2-3.3: KEM-60 DRS4 piping diagr inlet outlet Legend DC inverter compressor 1 Antifreeze heater of plate heat exchanger DC inverter compressor 2 Water side antifreeze temperature sensor 2 Crankcase heater 1 Water side antifreeze temperature sensor 1 Crankcase heater 2 Stop valve DC inverter compressor discharge temperature sensor 1...
  • Page 25 DC Inverter Chiller KEM-60 DRS4 KH Figure 2-3.4: KEM-60 DRS4 KH piping diagram inlet outlet Legend DC inverter compressor 1 Water side antifreeze temperature sensor 2 DC inverter compressor 2 Water side antifreeze temperature sensor 1 Crankcase heater 1 Stop valve Crankcase heater 2 Stop valve DC inverter compressor discharge temperature sensor 1...

  • Page 26: Wiring Diagrams

    DC Inverter Chiller 4 Wiring Diagrams KEM-30 DRS4, KEM-30 DRS4 KH Figure 2-4.1: KEM-30 DRS4, KEM-30 DRS4 KH wiring diagra...
  • Page 27 DC Inverter Chiller KEM-60 DRS4, KEM-60 DRS4 KH Figure 2-4.2: KEM-60 DRS4, KEM-60 DRS4 KH wiring diagram...

  • Page 28: Capacity Tables

    DC Inverter Chiller 5 Capacity Tables 5.1 Heating Capacity Tables Table 2-5.1: KEM-30 DRS4, KEM-30 DRS4 KH heating capacity Chilled water outlet temperature (°C) Ambient 30.00 35.00 40.00 45.00 50.00 54.00 temp (°C) -14.00 21.56 7.94 20.96 8.45 20.73 9.99 19.69...
  • Page 29 DC Inverter Chiller 5.2 Cooling Capacity Tables Table 2-5.3: KEM-30 DRS4 cooling capacity Chilled water outlet temperature (°C) Ambient 5.00 7.00 10.00 13.00 15.00 20.00 temp. Capacity Power Capacity Power Capacity Power Capacity Power Capacity Power Capacity Power (°C) -10.00 30.19...

  • Page 30: Operating Limits

    DC Inverter Chiller 6 Operating Limits 6.1 Cooling operating range Figure 2-6.1: KEM-30 DRS4, KEM-30 DRS4 KH, KEM-60 DRS4, KEM-30 DRS4 KH Cooling operating range Outlet water temperature (℃) 6.2 Heating operating range Figure 2-6.2: KEM-30 DRS4, KEM-30 DRS4 KH, KEM-60 DRS4, KEM-30 DRS4 KH...

  • Page 31: Hydronic Performance

    DC Inverter Chiller 7 Hydronic Performance KEM-30 DRS4, KEM-30 DRS4 KH Figure 2-7.1: KEM-30 DRS4, KEM-30 DRS4 KH Hydronic performance Water flow rate (m KEM-60 DRS4, KEM-60 DRS4 KH Figure 2-7.2: KEM-60 DRS4, KEM-60 DRS4 KH Hydronic performance Figure 2-7.2: MC-SU60-RN8L, MC-SU60M-RN8L Hydronic performance...
  • Page 32 DC Inverter Chiller Pump head curve Figure 2-7.3: YKB-650-2-1 Hydronic performance of KEM-30 DRS4 KH Water flow rate (m Figure 2-7.4: YKB-1500-2-1 Hydronic performance of KEM-60 DRS4 KH Water flow rate (m...

  • Page 33: Sound Levels

    8 Sound Levels 8.1 Overall Table 2-8.1: Sound pressure levels Model name dB(A) KEM-30 DRS4 64.8 KEM-30 DRS4 KH 65.1 KEM-60 DRS4 71.3 KEM-60 DRS4 KH 71.4 Notes: Sound pressure level is measured at a position 1m in front of the unit and (1+H)/2m (where H is the height of the unit) above the floor in a semi-anechoic chamber.
  • Page 34 NR-40 NR-30 NR-20 NR-10 NR-0 31.5 1000 2000 4000 8000 Octave band central frequency (Hz) Figure 2-8.3: KEM-30 DRS4 KH octave band level (in cooling mode at rated compressor frequency) NR-90 NR-80 NR-70 NR-60 NR-50 NR-40 NR-30 NR-20 NR-10 NR-0 31.5...
  • Page 35 DC Inverter Chiller Figure 2-8.4: KEM-60 DRS4 octave band level (in cooling mode at rated compressor frequency) NR-90 NR-80 NR-70 NR-60 NR-50 NR-40 NR-30 NR-20 NR-10 NR-0 31.5 1000 2000 4000 8000 Octave band central frequency (Hz) Figure 2-8.5: KEM-60 DRS4 KH octave band level (in cooling mode at rated compressor frequency) NR-90 NR-80 NR-70...
  • Page 36 NR-40 NR-30 NR-20 NR-10 NR-0 31.5 1000 2000 4000 8000 Octave band central frequency (Hz) Figure 2-8.7: KEM-30 DRS4 KH octave band level (in heating mode at rated compressor frequency) NR-90 NR-80 NR-70 NR-60 NR-50 NR-40 NR-30 NR-20 NR-10 NR-0 31.5...
  • Page 37 DC Inverter Chiller Figure 2-8.8: KEM-60 DRS4 octave band level (in heating mode at rated compressor frequency) NR-90 NR-80 NR-70 NR-60 NR-50 NR-40 NR-30 NR-20 NR-10 NR-0 31.5 1000 2000 4000 8000 Octave band central frequency (Hz) Figure 2-8.9: KEM-60 DRS4 KH octave band level (in heating mode at rated compressor frequency) NR-90 NR-80 NR-70...

  • Page 38: Accessories

    DC Inverter Chiller 9 Accessories 9.1 Standard accessories Table 2-9.1: Standard accessories Quantity Name Shape KEM-30 DRS4 KEM-60 DRS4 Installation & Operation Manual Temperature testing components for total water outlet Wired controller power adapter Wired controller installation manual...
  • Page 39 DC Inverter Chiller Part 3 Installation and Field Settings Preface to Part 3 ................. 38 Unit Placement and Installation ............39 Water System Design and Installation ..........44 Electrical Wiring .................. 50 Field Settings ..................56 Commissioning and Maintenance ............57 User Interface Field Settings for KCCHT-05 MODBUS ......

  • Page 40: Preface To Part 3

    The information contained in this Engineering Data Book may primarily be of use during the system design stage of a Kaysun Aqua Tempo Super II project. Additional important information which may primarily be of use during field installation has been placed in boxes, such as the example below, titled "Notes for installers".

  • Page 41: Unit Placement And Installation

    DC Inverter Chiller 2 Unit Placement and Installation 2.1 Acceptance and Unpacking  Notes for installers  When units are delivered check whether any damage occurred during shipment. If there is damage to the surface or outside of a unit, submit a written report to the shipping company. ...
  • Page 42 DC Inverter Chiller Figure 3-2.1: Hoisting the unit the angle of inclinaton the angle of inclinaton Lifted hook 2.3 Placement Considerations Placement of outdoor units should take account of the following considerations:  Outdoor units should not be exposed to direct radiation from a high-temperature heat source. ...
  • Page 43 Inlet and outlet 1105 pipe side Electric control Inlet and outlet box side pipe side Electric control box side Drainage channel Anchor bolt Drainage channel Anchor bolt MC-SU30-RN8L, MC-SU30M-RN8L MC-SU60-RN8L, MC-SU60M-RN8L KEM-30 DRS4, KEM-30 DRS4 KH KEM-60 DRS4, KEM-60 DRS4 KH...
  • Page 44 DC Inverter Chiller 2.5 Drainage Drainage ditch should be provided to allow drainage of condensate that may form on the air side heat exchanger when the unit is running in heating mode. The drainage should ensure that condensate is directed away from roadways and footpaths, especially in locations where the climate is such that condensate may freeze.
  • Page 45 DC Inverter Chiller Table 3-2.1: Recommend minimum spacing Installation space (mm) Module KEM-30 DRS4 KEM-30 DRS4 KH ≥800 ≥2000 ≥2000 ≥800 ≥800 ≥1100 ≥6000 KEM-60 DRS4 KEM-60 DRS4 KH 2.7 Installation of Damping Devices 2.7.1 Damping devices must be provided between the unit and its foundation By means of the installation holes on the steel frame of the unit base, the unit can be fastened on the foundation through the spring damper.

  • Page 46: Water System Design And Installation

    DC Inverter Chiller 3 Water System Design and Installation 3.1 Water Circuit Checks Aqua Tempo Super II units are equipped with a water inlet and outlet for connection to a water circuit. Aqua Tempo Super II units should only be connected to closed water circuits. Connection to an open water circuit would lead to excessive corrosion of the water piping.
  • Page 47 DC Inverter Chiller Table 3-3.1: Applicable standard of water quality for the unit Total Conductivity Sulfide ions Chloride Ammonia Sulfate Silicon Iron Sodium Calcium value hardness ions ions ions ions ions 6.8- < 70ppm < 200 μV/cm < < < <...
  • Page 48 DC Inverter Chiller 3.2.5 Fouling factor Fouling refers to the accumulation of unwanted material on solid surfaces, most often in an aquatic environment. The fouling material can consist of either living organisms (biofouling) or a non-living substance (inorganic or organic). Fouling is usually distinguished from other surface-growth phenomena in that it occurs on a surface of a component, system or plant performing a defined and useful function, and that the fouling process impedes or interferes with this function.
  • Page 49 DC Inverter Chiller 3.3 Installation of Water System Pipeline water system pipeline 3.3.1 Installation of single-module Figure 3-3.1: Installation of single-module water system pipeline Water inlet Water outlet Figure 3-3.2: connection method of KEM-30 DRS4 Figure 3-3.3: connection method of KEM-60 DRS4...
  • Page 50 DC Inverter Chiller 3.3.2 Installation of multi-module water system pipeline Figure 3-3.4: Installation of multi-module water system pipeline No.n module No.(n-1) module No.1 module No.(n-1) address No.(n-2) address No.0 address Drill dead hole at the position, and move the total effluent temperature sensor at No.0 address to Pump the position...
  • Page 51 Table 3-3.6: Minimum and Maximum water flow rates Water flow rate(m Model Minimum Maximum KEM-30 DRS4 KEM-60 DRS4 13.0 3.3.5 Water circuit connection Water connections must be made correctly in accordance with the labels on the outdoor unit, with respect to the water inlet and water outlet.

  • Page 52: Electrical Wiring

    DC Inverter Chiller 4 Electrical Wiring 4.1 General  Notes for installers Caution  All installation and wiring must be carried out by competent and suitably qualified, certified and accredited professionals and in accordance with all applicable legislation.  Electrical systems should be grounded in accordance with all applicable legislation. ...
  • Page 53 Note: up to 4 units can be combined at most. Table 3-4.1: Power supply specifications Outdoor power supply Model Wiring Power supply Manual switch Fuse KEM-30 DRS4 10mm X5(<20m) 380-415V 3Ph~50Hz KEM-30 DRS4 KH KEM-60 DRS4 16mm X5(<20m) 380-415V 3Ph~50Hz 100A KEM-60 DRS4 KH...
  • Page 54 HEAT1 and COM of terminal XT1 of the main unit, as shown in Fig.3- KEM-30 DRS4 and KEM-60 DRS4 connection of control wires of pump: the control wires of AC contactor of pump must pass the connection terminas PUMP and N of terminal XT1 of the main unit, as shown in Fig.
  • Page 55 DC Inverter Chiller 4.5 Wiring Overview Figure 3-4.3: diagram combination system of KEM-30 DRS4, KEM-30 DRS4 KH...
  • Page 56 DC Inverter Chiller Figure 3-4.4: diagram combination system of KEM-60 DRS4, KEM-60 DRS4 KH...
  • Page 57 DC Inverter Chiller Table 3-4.3: Wiring requirements Required number of Maximum running Item Description Current Minimum wiring size conductors current User interface wire 200mA 0.75-1.25mm Auxiliary heater control wire 200mA Pump control wire 200mA ON/OFF signal wir 0.75mm Cool/Heat signal wire 0.75mm Alarm signal wire 200mA...

  • Page 58: Field Settings

    Single water pump control S12-2 Multiple water pumps control Normal cooling mode S12-3 Low-temperature cooling mode 0: KEM-30 DRS4 ENC2 DIP switch of outdoor unit capacity 1: KEM-60 DRS4 DIP switch of outdoor unit network address ENC4 0: master unit...

  • Page 59: Commissioning And Maintenance

    DC Inverter Chiller 6 Commissioning and Maintenance 6.1 Commissioning 6.1.1 Preparation  After the water system pipeline is flushed several times, please make sure that the purity of water meets the requirements; the system is re-filled with water and drained, and the pump is started up, then make sure that water flow and the pressure at the outlet meet the requirements.
  • Page 60 DC Inverter Chiller 6.2.2 Removing scale After long-time operation, calcium oxide or other minerals will be settled in the heat transfer surface of the water-side heat exchanger. These substances will affect the heat transfer performance when there is too much scale in the heat transfer surface and sequentially cause that electricity consumption increases and the discharge pressure is too high (or suction pressure too low).
  • Page 61 DC Inverter Chiller  When the degree of vacuum is reached, inject refrigerant into the refrigeration system with refrigerant bottle. Appropriate amount of refrigerant for injection has been indicated on the nameplate and the table of main technical parameters. Refrigerant must be injected from the low pressure side of system. ...

  • Page 62: User Interface Field Settings For Kccht-05 Modbus

    DC Inverter Chiller 7 User Interface Field Settings for KCCHT-05 MODBUS 7.1 Introduction During installation, the unit’s settings and parameters should be configured by the installer to suit the installation configuration, climate conditions and end-user preferences. The relevant settings are accessible and programmable through the PROJECT menu on the wired controller’s user interface.
  • Page 63 DC Inverter Chiller 7.2 Menu operation 7.2.1 Unlocking/Locking operation When the wired controller is locked, press and hold the "UNLOCK" button for 3s to unlock it; when " " is not displayed in the locked status, press and hold the "UNLOCK" button for 3s to lock it. When " "...
  • Page 64 DC Inverter Chiller 7.2.5 Auto-restart function The power supply to the system fails unexpectedly during operation. When the system is powered on again, the wired controller continues to operate according to the status before the last power failure, including the power-on/off status, mode, set temperature, failure, protection, wired controller address, timer, hysteresis, etc.
  • Page 65 DC Inverter Chiller When set address "01-15" and press "OK" button, the wired controller will enter the interface as follows. Figure 3-7.6: Main page for slave wired controller 10:35 A 20/11/2017 ONLIN E CO OL Tws 55 C UNITE S 55 C ERRO R 55 C...
  • Page 66 DC Inverter Chiller 7.3 Setting PROJECT MENU 7.3.1 PROJECT menu structure For PROJECT Menu 1.SET UNIT AIR-CONDITIONING 1. SET UNIT Tw_cool_Diff AIR-CONDITIONING Tw_heat_Diff 2. SET PARALLEL UNIT dT5_ON 3. SET UNIT PROTECTION dT1S5 4. SET DEFROSTING 5. SET HEATER 6. CHECK PARTS 2.SET PARALLEL UNIT 7.
  • Page 67 DC Inverter Chiller 7.3.2 Entering the password Select "PROJECT MENU", and press the "OK" button to enter the menu. The screen prompts the user to enter the password is shown as below. Figure 3-7.7: PROJRCT password screen The initial password is 6666 and cannot be changed. Press the " ▲ " and " ▼ " buttons to change the number to enter, and press the "...
  • Page 68 DC Inverter Chiller Set unit air-conditioning Select "SET UNIT AIR-CONDITIONING", and press the "OK" button to enter the interface. The interface display is as follows. Figure 3-7.10: Set unit air-conditioning interfac PROJEC T MENU SELECT THE QUERING ADDRES S Tw_heat Tw_cool _Di f f _Di f f...
  • Page 69 DC Inverter Chiller Press the " ▲ " and " ▼ " buttons to set the values and press "OK" button to save the setting and return to the previous interface, or press the "BACK" button to cancel the setting and return to the previous interface. If there is no operation in 60 seconds, the wired controller will return to the home page.
  • Page 70 DC Inverter Chiller Check parts Select "CHECK PARTS", and press the "OK" button to enter the interface. The interface display is as follows. Figure 3-7.16: Check parts interface back The screen displays conditions of all parts; users can press "BACK" button to exit after confirming. Controller select Select "CONTROLLER SELECT", and press the "OK"...
  • Page 71 DC Inverter Chiller 7.3.3 Parameters setting Table 3-7.2: Parameters setting parameters Setting range Default value Adjustment range Defrosting cycle 20 min to 120 min 35 min 5min Defrost enter temperature -5⁰C to 5⁰C 0⁰C 1⁰C Defrost exit temperature -10⁰C to +10⁰C 0⁰C 1⁰C Capacity adjustment period...

  • Page 72: Appendix

    DC Inverter Chiller 8 Appendix 8.1 Error Code Table Table 3-8.1: Error code table of KEM-30 DRS4, KEM-30 DRS4 KH, KEM-60 DRS4 and KEM-60 DRS4 KH Error cod Content Main control parameter memory EEPROM failure Phase sequence failure of main control board check...
  • Page 73 DC Inverter Chiller Table 3-8.1: Error code table of KEM-30 DRS4, KEM-30 DRS4 KH, KEM-60 DRS4 and KEM-60 DRS4 KH (continued) IPM module communication failure Superheat insufficient L0 or L1 protection occurs 3 times in 60 minutes DC bus voltage error (PTC)
  • Page 74 Ver. 2019-03...

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