York 21RT-47RT Installation, Operation And Maintenance Manual
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York 21RT-47RT Installation, Operation And Maintenance Manual

Water-cooled chiller
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YCWE Modular
Water-Cooled Chiller
Installation, Operation and
FORM NO.: 6U6W-A01C-NB-EN
Maintenance Manual
YCWE Modular
Water-Cooled Chiller
21RT-47RT
R410A Refrigerant
Cooke Industries - Phone: +64 9 579 2185
Email: sales@cookeindustries.co.nz
Web: www.cookeindustries.co.nz

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Summary of Contents for York 21RT-47RT

  • Page 1 YCWE Modular Water-Cooled Chiller Installation, Operation and FORM NO.: 6U6W-A01C-NB-EN Maintenance Manual YCWE Modular Water-Cooled Chiller 21RT-47RT R410A Refrigerant Cooke Industries - Phone: +64 9 579 2185 Email: sales@cookeindustries.co.nz Web: www.cookeindustries.co.nz...

  • Page 2: Table Of Contents

    Table of Contents Table of Contents Part 1: Introduction of Unit ............................2 1.1. Description of Unit Model ..........................2 1.2. Parameter Table of High-efficient Single-cooling Unit ..................3 1.3. Outline Dimensions of the Unit ........................4 1.4. Operating Range ............................... 7 1.5.
  • Page 3 Table of Contents Part 7: Description for Modbus protocol interface ..................... 77 7.1. Device connection ............................77 7.2. Modbus Protocol ............................. 77 Cooke Industries - Phone: +64 9 579 2185 Email: sales@cookeindustries.co.nz Web: www.cookeindustries.co.nz...
  • Page 4 The warranty coverage must meet the following conditions: The installation must be carried out by trained professionals. The start-up of the machine must be carried out by professional maintenance personnel of the professional York Company Maintenance Service Center or designated special company personnel.

  • Page 5: Part 1: Introduction Of Unit

    Each module includes the scroll compressor, condenser, evaporator, expansion valve and microcomputer control center, etc. 1.1. Description of Unit Model Name Code Position Code 1: Y–York Code 2: C– Chillers Code 3: W – Water-cooled Type Code 4: E–Scroll Compressor...

  • Page 6: Parameter Table Of High-Efficient Single-Cooling Unit

    Introduction of Unit 1.2. Parameter Table of High-efficient Single-cooling Unit Model YCWE021XSME YCWE032XSME YCWE042XSME Refrigerant R410A R410A R410A Nominal Refrigeration 76.2 114.2 151.9 Capacity Refrigeration Nominal Input Power 14.4 21.6 28.7 kW/kW 5.29 5.29 5.29 Heat Recovery Volume 90.6 135.8 180.6 Heat Recovery...

  • Page 7: Outline Dimensions Of The Unit

    Introduction of Unit 1.3. Outline Dimensions of the Unit YCWE021XSME50 YCWE021XSME50-A Cooke Industries - Phone: +64 9 579 2185 Email: sales@cookeindustries.co.nz Web: www.cookeindustries.co.nz...
  • Page 8 Introduction of Unit YCWE032XSME50 YCWE042XSME50 Cooke Industries - Phone: +64 9 579 2185 Email: sales@cookeindustries.co.nz Web: www.cookeindustries.co.nz...
  • Page 9 Introduction of Unit YCWE032XSME50-A YCWE042XSME50-A Note:  The picture is the schematic diagram, and the internal structure shall be subject to the real object.  Connection mode of water inlet-outlet pipe is the clamp connection Cooke Industries - Phone: +64 9 579 2185 Email: sales@cookeindustries.co.nz Web: www.cookeindustries.co.nz...

  • Page 10: Operating Range

    Introduction of Unit 1.4. Operating Range Voltage Range Standard of Power Supply: 380VAC -3N-50Hz / 400VAC-3N-50Hz Maximum allowable fluctuation range of the power supply voltage shall be ±10% Unbalance rate of the three-phase voltage shall be less than 2% Temperature Range Items Range Usage environment for 7-inch screen controller...

  • Page 11: Water Pressure Drop Curve For The Unit

    Introduction of Unit Altitude: ≤2000m Water flow: 70-130% rated water flow Water side pressure: ≤10bar Installation Site: see the Chapter of “Selection for Installation Position” Water Quality: see the Chapter of “Water Treatment” 1.5. Water Pressure Drop Curve for the Unit Water Pressure Drop Curve for Condenser (Shell-tube Type Heat Exchanger): Water Pressure Drop (kPa) Flow Rate (m...

  • Page 12: Part 2: Installation Requirements

    Installation Requirements Part 2: Installation Requirements 2.1. Inspection Items Before Installation  Whether the nameplate information of the unit is the same as the order  Whether the unit's attached files are complete  Whether the unit's attached accessories are consistent with the items listed on the packing list (The controller is ordered separately without being placed in the unit) ...

  • Page 13: Selection For The Installation Position Of The Unit

    The unit shall be installed in the area whose altitude is below 2000m. If it is more than this range, it may cause damage to the unit or injury to the personnel. Please contact York's Special Maintenance Center if it is unavoidable ...
  • Page 14 Installation Requirements Installation Space In order to ensure the daily maintenance and service of the unit, enough space shall be reserved between the units. Unit without Shell: Unit with Shell: Vibration Reduction: It is recommended to install the shock absorber between the foundation and the unit supporting leg. If the rubber damping pad is selected, its thickness shall be over 20 mm;...

  • Page 15: Remove Compressor's Transport Fixed-Parts

    Installation Requirements Shock Absorber Optimal Load Optimal Load Optimal Load Optimal Load Standard Unit Total for Point A (kg) for Point B (kg) for Point C (kg) for Point D (kg) YCWE021~023 YCWE032~034 YCWE042~047 Shock Absorber Optimal Load Optimal Load Optimal Load Optimal Load Unit (With Shell)

  • Page 16: Installation Of Water System

    Installation Requirements Compressor’s vibration-reduction bracing-component is a white sheet metal part, and the following marks are pasted on the bracing-component. Quantity of compressor’s vibration-reduction bracing-component: YCWE021~023 - 4 pcs YCWE032~034 - 4 pcs YCWE042~047 - 8 pcs 2.6. Installation of Water System Pipe’s Prefabrication Requirements ...
  • Page 17 Installation Requirements can also be cut off during maintenance without affecting the normal operation of other units. Caution: Before the cut-off, it is necessary to confirm that the corresponding unit is in shutdown state, and when it is cut-off for a long time in the winter, the cut-off unit must drain the water completely, in order to prevent the heat exchanger from the frost damage.
  • Page 18 Installation Requirements the water system, the total water outlet temperature sensor of the water system must be installed after the installation of the auxiliary electrical heating.  The minimum flow of the unit shall not be less than 70% of the rated flow of the unit at any time, and its maximum flow shall not exceed 130% of the rated flow of the unit at any time.
  • Page 19 Installation Requirements Installation Diagram of Water System (For Reference Only): Diagram of Cooling Application At the system’s chilled water’s (using side) and cooling water’s (heat-source side) three-way valve default state, the main board only provides control points Cooling: if the chilled water’s (using side) three-way valve is de-energized, the cooling water’s (heat source side) three-way valve will be de-energized Heating: if the chilled water’s (using side) three-way valve is energized, the cooling water’s (heat source side) three-way valve will be energized...

  • Page 20: Buffer Tank

    If the site’s requirements for the water’s temperature fluctuation is high, please contact the personnel of the York office. The recommended installation position of the buffer tank is the backwater side of the unit. Please refer to the following installation method.

  • Page 21: System Outlet/Return Water Temperature Sensor

    Installation Requirements disconnection action value of the water flow switch shall be set to 60% of the rated water flow; In each module’s attached accessories package, there will be attached with one chilled-water flow switch. The module’s water flow switch is required to be installed on the evaporator’s outlet pipe of each module (installed by the user), and its turn-off value has been set before delivery.

  • Page 22: Water Treatment

    Installation Requirements Piece 1: the sensor shall be installed with the casing pipe. Its inside and outside are the 3/8-18 and 1/2-14 NPT threads respectively Piece 2: 1/2-14 NPT internal thread base. It shall be welded to the main water pipe Note: 3/8-18 NPT external thread lock shall be screwed on the sensor’s casing pipe tightly.

  • Page 23: Part 3: Electrical Connection

    Electrical connection Part 3: Electrical Connection 3.1 Safety Precautions It is earnestly requested to be strictly observe the various safety-related important matters listed in the “Safety Precautions”. Symbols Used in This Manual Warning: The warning must be observed to avoid physical injury to the user. Caution: The warning must be observed to avoid damage to parts.

  • Page 24: Communication Wiring And Address Setting

    Electrical connection 3.2. Communication wiring and address setting 3.2.1 Wiring for the modular application  Wiring for the wire controller: The whole system can be composed of 1-8 units, and the control quantity of the wire controller cannot be more than 8 units. ...
  • Page 25 Electrical connection 3.2.2 Wiring of the master unit (1 # module)  System evaporator water flow switch / System condenser water flow switch  Remote switch / External interlock  System chilled water pump / System condenser water pump / System evaporator three-way valve / System condenser three-way valve / Cooling tower fan and water pump / Auxiliary electric heater / Unit alarm ...
  • Page 26 Electrical connection 3.2.3 Module’s water flow switch and water valve’s wiring (all modules)  Water side’s shut-off valve for module’s evaporator and condenser ＯＵＴＰＵＴ ＯＵＴＰＵＴ ２２０ＶＡＣ ２２０ＶＡＣ Caution: It must correspond to the module, for example, the water valve on the 2# module water pipe must be connected to the 2# module machine.
  • Page 27 Electrical connection Module No.: The setting of the DIP address has been set at the delivery of the unit. If module’s centralized control shall be adopted on the site, it is required to reset the address of each module (the addresses set at the delivery are all the 1 #).

  • Page 28: Recommendation For The Power Cable Of The Unit

    The above wire diameter and the specification for the circuit breaker are only for each single module, and for the total circuit breaker and the power line’s specification, their selection shall be determined according to the total load, and you can contact York’s after-sales personnel 3.4. Installation and wiring of the unit 3.4.1 Power distribution diagram of system...

  • Page 29: Installation Of Wire Controller

    Electrical connection 3.5. Installation of wire controller 3.5.1 Working environment of control system and related standards Items Parameter Working -20°C～60°C RH＜93% Non-condensing environment: Storage -30°C～70°C environment Vibration 10Hz£ f< 57Hz, 0.15mm 57Hz ≤f≤200 Hz, 20m/s 2 environment 10 times for 1 octave per minute 3.5.2 Split for front panel Caution: As printed circuit board is on the front pnael of controller, be cautious when using flat-head screwdriver.
  • Page 30 Electrical connection 3.5.4 Wiring description for wire controller 3.5.4.1 The connection between the wire controller and the unit is shown in the following figure Note: One controller can only control one unit. Wire Controller 1# Module +12V +12V 0V 1. Communication cables between host and wire controller should be 85% net type shielded wire of four-core, which length is within 15m.
  • Page 31 Electrical connection 3.5.5 Dialing plate (SW1) Dialing code for wire controller SW1-1 SW1-2 SW1-3 SW1-4 SW1-5 SW1-6 After the Installation and setting, pull out the battery isolating bar and snap the front and back panels together 3.5.6 Precautions for installation of wire controller ...

  • Page 32: Unit Electrical Schematic Diagram

    Cooke Industries - Phone: +64 9 579 2185 Email: sales@cookeindustries.co.nz Web: www.cookeindustries.co.nz...
  • Page 33 Cooke Industries - Phone: +64 9 579 2185 Email: sales@cookeindustries.co.nz Web: www.cookeindustries.co.nz...
  • Page 34 Cooke Industries - Phone: +64 9 579 2185 Email: sales@cookeindustries.co.nz Web: www.cookeindustries.co.nz...

  • Page 35: Part 4: Operation Instructions Of Wire Controller

    Operation instructions of wire controller Part 4: Operation instructions of wire controller 4.1 Appearance Description The wire controller can be used for performing on-off control by the on-off key, and the key is in the form of a button (mechanical-type); The rest of the control keys are in the form of touch-screen, and the touch screen and the display part compose the entire screen, therefore they are indivisible.

  • Page 36: Power-On Initialization

    Operation instructions of wire controller (3)--Air-conditioning temperature and tank temperature display area as well as the set value display area (4)--Number of display code (5)--Operation mode display area (6)--Status display areas such as screen lock, communication, etc. (7)--Key area 4.2 Power-on initialization Entry conditions: power up Exit condition: 1）...
  • Page 37 Operation instructions of wire controller Communication flashing display: display of flashing icon Others will not be shown 4.4.2 Screen saver status Backlight off 4.4.3 Daily display status Serial Display content (daily display) Number Display Area Power Power On Time display The current date and time of the system can be modified by wire controller, and area the default value is 2000-1-1 0:00.

  • Page 38: Keys

    Operation instructions of wire controller Diagram of temperature display Schematic for the display of negative temperature (the display should be as compact as the diagram, and the numerical value shall be right-justified) 4.4.4 Alarm status 1) Display of communication fault between the wire controller and the unit When a communication fault occurs between the wire controller and the unit, will flash, and there will be flashing display of the fault code in temperature display area;...

  • Page 39: Mechanical Switch Key

    Operation instructions of wire controller 4） If the backlight is on, under daily display state, when press the running key, such as the mode/temperature key, etc., the first press will not trigger the operation, and this will only transfer the state from the daily display state to the operation interface, and the saved setting value will be displayed, and then the second keypress will change the setting value.
  • Page 40 Operation instructions of wire controller Precondition: under daily display state or mode setting state: 1） Press any mode setting key to enter the mode setting state; 2） Display the “SET” icon of the temperature display area; 3） Short press the key and the heat recovery Selection key icon will flash;...
  • Page 41 Operation instructions of wire controller Operation steps: Conditions for entry time and date settings When it is in the daily display state, long pressed for 5 seconds to enter the system clock setting, and the sign and “SET” will display, and the year start will falsh in the timing display area.
  • Page 42 Operation instructions of wire controller 4.9.2.2 Timing setting function Function keys: Operation steps: a) Conditions for entering the timing setting In the daily display state, long press key for 5 senconds, then it enters the timed setting state to read the timing setting value into the register. At this time, the and “SET”...
  • Page 43 Operation instructions of wire controller Press to restore the default value and transfer to the next setting object. If the timing ON and OFF are not set, the timing mode setting can be skipped. d) Timing mode setting Enter the timing mode setting and flickeringly display the original timing mode setting. If it is empty in previous time, the default value shall be ONCE.
  • Page 44 Operation instructions of wire controller Caution: If the timing ON or OFF time is set, and the timing mode is WEEKLY, but the specific week is not set, then if the setting timing is saved, it will not be performed because there is no specific day.
  • Page 45 Operation instructions of wire controller System level Parameter item Name Set range Note Restore the default value 1-Reset 0 - backwater constant-water-temperature Selection for cooling control control; 1 - outflow-water constant-water-temperature control 0 - backwater constant-water-temperature Selection for heating control control;...
  • Page 46 Operation instructions of wire controller Limit value for low exhaust Un-settable pressure Protection factor for excessively Un-settable Represent 1. 0~2.5 low exhaust pressure Shielding time for water flow Un-settable Seconds switch detection Delay for water flow switch Un-settable Seconds detection Selection for hot and cold mode 0-HMI, 1-BAS ON-OFF selection...
  • Page 47 Operation instructions of wire controller 4.9.3 Inquiry function 4.9.3.1 Fault inquiry function Function keys: Operation steps: a) Conditions to enter the fault inquiry In daily display state, long press for more than 5 seconds to enter the fault inquiry state b) Display description for fault inquiry Daily fault display: flashes,...
  • Page 48 Operation instructions of wire controller Short press to exit the fault inquiry and return to the daily display status. Or do not perform keypad operation for 10 seconds to exit the fault inquiry and return to the daily display state. Note: During the operation, pressing other irrelevant keys shall be invalid.
  • Page 49 Operation instructions of wire controller DI10 DI11 DI12 DI13 DI14 DI15 DI16 DI17 DI18 DI19 DI20 DI21 DI22 DI23 DI24 DI25 DI26 DI27 DI28 DI29 DI30 DI31 DI32 Fault name Fault code Communication fault Fault of the communication with the HMI Water temperature sensor fault of the controlled system System’s chilled water flow fault System’s cooling water flow fault...
  • Page 50 Operation instructions of wire controller The exhaust gas temperature is too high 2_2 Deviation of exhaust gas temperature is too high 1 Deviation of exhaust gas temperature is too high 2 Low suction gas superheat 1 Low suction gas superheat 2 Low discharge superheat 1_1 Low discharge superheat 1_2 Low discharge superheat 2_1...
  • Page 51 Operation instructions of wire controller AI23 2 # exhaust pressure EVE1 EEV2 1# suction gas superheat 2# suction gas superheat Software version for module A Software version for wire controller c) Operation Press to display the previous and next parameter status words d) Conditions for exiting the inquiry of unit’s operation status Short press to exit and return to the daily display status...
  • Page 52 Operation instructions of wire controller d) Exit condition Short press to cancel wire controller’s key lock function. The ON-OFF key of wire controller and the key area of touch screen will lock the operability of the recovery, and the display interface will disappear.

  • Page 53: Part 5: Operation Description For Hmi 7-Inch Touch Screen

    Operation description for HMI 7-inch touch screen Part 5: Operation description for HMI 7-inch touch screen 5.1. Overview The 7-inch touch screen controller is developed for modular water-cooled chiller and heat pump, and the user can configure and modify the unit’s parameters through the human-machine interface and can see the running data and the program data through the touch screen.
  • Page 54 Operation description for HMI 7-inch touch screen 5.3.1 Main interface Figure 1 Main interface This default window interface will appear after the HMI controller is energized for one-minute start-up. At the start, system’s default access level is the observer, and the user of this level can turn over the data for display only, as shown in Figure 1.
  • Page 55 Operation description for HMI 7-inch touch screen 5.3.3 Function area The unit contains various parts information and it needs to classify and process different information, therefore each function in the left function area shall respectively correspond to one class of information area. The display content in the function area is related to the access level.
  • Page 56 Operation description for HMI 7-inch touch screen Figure 3. Password input box If the inputting password is wrong, the dialog box will pop up to indicate that inputting password is wrong, as shown in Figure 4 below. If 5 times of incorrect password is input continuously, the input ofpassword will be prohibited within 15 minutes, as shown in Figure 5 below.

  • Page 57: Module Status Interface

    Operation description for HMI 7-inch touch screen 5.4. Module status interface Figure1.1. Module status Interface Under module status interface, the right display area will display various information related to the module. In order to display the information of the corresponding module, the user firstly needs to select the corresponding module number through the “Unit Selection”...
  • Page 58 Operation description for HMI 7-inch touch screen DI1 module’s chilled water flow switch DI2 module’s cooling water flow switch DI3 1# high-voltage switch DI4 1# low-voltage switch DI5 1-1 compressor overload DI6 1-2 compressor overload DI7 Remote switch DI8 external interlock DI9 Power supply protection DI10 2#high-voltage switch DI11 2# low-voltage switch...

  • Page 59: Module Status Interface

    Operation description for HMI 7-inch touch screen 5.5. Module status interface The fault interface will display the fault information obtained from the unit communication, and each fault information will include the date, time, module number and fault description. It will have a buffer time of 6 seconds when entering the fault interface, on account of that it is necessary to read the fault information from the control panel.
  • Page 60 Operation description for HMI 7-inch touch screen Figure 8. Fault interface at the time of the fault When entering the operator level, there will appear a button of clearing the fault in fault interface, as shown in Figure 9. Click this button, and then you can send a command of clearing fault to unit’s main module through communication.

  • Page 61: Human-Machine Interface

    Operation description for HMI 7-inch touch screen 5.6. Human-machine interface The settings and information related to human-machine interface controller will be displayed in human-machine interface. There will be different display contents under different levels, as shown in the following table. Region Item Access level...
  • Page 62 Operation description for HMI 7-inch touch screen Setting for brightness Set backlight’s brightness for the screen of human-machine interface controller. Standby time setting Under the condition of not touching the touch screen, set the time required for the closing of the screen and the required time that the touch screen returns to the standby status Language setting Setting the display language of the human-machine interface...
  • Page 63 Operation description for HMI 7-inch touch screen The display of human-machine interface under maintenance level is shown in Figure 15. Figure 15. Human-machine interface under maintenance level Safety Under maintenance level the security interface will display “Restore Password” button, and the current level password can be restored to the default by clicking the “Restore Password”...

  • Page 64: System's Configuration Interface

    Operation description for HMI 7-inch touch screen Brand Settings This setting can be used to change the display of the brand image on the upper left corner, and the change value should be set before the delivery. 5.7. System’s configuration interface System’s configuration interface is accessible only for the operator level or maintenance level, as shown in Figure 18.
  • Page 65 Operation description for HMI 7-inch touch screen Selection for running mode Operator ON-OFF selection Operator Power-down memory Operator Clear cumulative running time Maintenance EXV refrigeration initial steps Maintenance EXV heating/heat recovery initial steps Maintenance EXV refrigeration minimum steps Maintenance EXV heating/heat recovery minimum steps Maintenance Oil warm-up time Operator...
  • Page 66 Operation description for HMI 7-inch touch screen Figure 19. Options dialog box In the dialog box, there are three options - Cooling, heating and heat recovery. For water pump circulation, select corresponding options as needed, and then click OK to confirm the option. If you want to change this modification, you can click EXIT ON or OFF type: The configuration item in this type has only two options: ON and OFF, therefore you can click the target item...

  • Page 67: Schedule Interface

    Operation description for HMI 7-inch touch screen Figure 21. Digital input box 5.8. Schedule interface The schedule interface is accessible only for operator level or maintenance level, as shown in Figure 22. The schedule interface can help the user to set various timing ON-OFF actions, as shown below. Figure 22.
  • Page 68 Operation description for HMI 7-inch touch screen Figure 23. Schedule settings page The method for deleting ON-OFF timing is as follows: select the ON-OFF item which is expected to be deleted by clicking it, and then click it to delete this selected item. The “Reset Schedule”...

  • Page 69: Diagnosis Interface

    Operation description for HMI 7-inch touch screen Figure 2. The holiday page that has been set 5.9. Diagnosis interface The Diagnosis interface is accessible only for the maintenance level, as shown in Figure 26. The Diagnosis interface can help the test and maintenance personnel to directly perform hardware function diagnosis and control for the unit’s control board, and the configurable parameters of this interface are as follows.

  • Page 70: Fault Information

    Operation description for HMI 7-inch touch screen Diagram 26. Diagnosis interface If you intend to perform diagnosis control, firstly you must configure corresponding module for the item of “EXV mandatory action module” and configure the “Mandatory command options” at the same time, and then control corresponding item.
  • Page 71 Operation description for HMI 7-inch touch screen Exhaust temperature 2-1# sensor fault Exhaust temperature 2-2# sensor fault 1# suction temperature sensor fault 2# suction temperature sensor fault 1# low-pressure sensor 2# low-pressure sensor 1# high-pressure sensor 2# high-pressure sensor Module’s chilled water flow fault Module’s cooling water flow fault 1# high-voltage switch fault 1# low-voltage switch fault...

  • Page 72: Interface Definition

    Operation description for HMI 7-inch touch screen 5.11 Interface definition The liquid-crystal display touch screen has a power interface, and the power supply adopts DC12V. The “+” shall be connected to the DC power supply 12V, and the “-” shall be connected to the earthed power supply. A RS485 communication interface is connected with unit’s control board for communication, A1 is connected with A of unit control board 485 interface, and B1 is connected with B of unit control board 485 interface, as shown in the following figure: RS485 interface...

  • Page 73: Part 6: Maintenance

    Maintenance Part 6: Maintenance 6.1. Unit’s operation process  Check whether the external packing of the unit is in good condition  Check whether the attached accessories and the files are complete  Carefully read this IOM  Hoisting and unpacking ...

  • Page 74: Fault And Troubleshooting

    Maintenance condensation temperature of the refrigerant on the condensation side, its absolute value of the difference value should be among 3-8°C. If the temperature difference exceeds this value range, it indicates that the work efficiency of the heat exchanger has been reduced. Since certain chemical treatments shall be required during the cleaning process, the cleaning work must be done by the professionals.
  • Page 75 Maintenance If the pressure sensor’s output exceeds the range Circuit’s 2# low-pressure sensor (0~2200kpa) for 5s emergency stop Manual operation If the pressure sensor’s output exceeds the range Circuit’s 1# high-pressure sensor (0~4800kpa) for 5s emergency stop Manual operation If the pressure sensor’s output exceeds the range Circuit’s 2# high-pressure sensor (0~4800kpa) for 5s...
  • Page 76 Maintenance When the circuit’s exhaust pressure > high limit setpoint -300kPa, the circuit’s loading shall be limited; When 1150 <= suction pressure < 1550kPa, the limit value = maximum limit value of exhaust pressure + (1150-suction pressure) * 1.85; When the suction pressure is > 1550kPa, the limit value = the maximum limit value of the exhaust pressure + (1150-1550) * 1.85;...
  • Page 77 Maintenance The fault will automatically reset when the compressor’s Automatically; If it occurs for Excessive high exhaust Circuit’s exhaust temperature ≥ 110°C for 3s and when all the three times within 1 hour, the temperature 1_2 emergency stop exhaust temperatures within the circuit drop to 70°C circuit will be locked The fault will automatically reset when the compressor’s Automatically;...

  • Page 78: Fault Analysis

    Maintenance When the system’s cooling outflow water temperature ≥ the high setpoint of the cooling outflow water System’s temperature for 3s, cooling water there will be fault Main machine’s outlet alarm; Automatically; If it occurs for three times within 1 hour, the circuit will be locked emergency stop temperature is when the system’s...
  • Page 79 Note: If there are other problems or technical problems that need help, please call our York Service Center. Only professional York Maintenance Service Center can provide trained professional maintenance personnel and necessary equipment to carry out correct machine maintenance and ensure the ideal operation conditions of machine.
  • Page 80 Description for Modbus protocol interface Part 7: Description for Modbus protocol interface 7.1. Device connection Unit’s electric control cabinet provides the RS485 communication interface convenient for the user's monitoring the operation condition of the unit and system integrating. As long as the users follow the standard MODBUS protocol and comply with the protocol point table provided by us, they can monitor the unit easily.
  • Page 81 Description for Modbus protocol interface Set value for hot water tank Setting Range Shall Be the 3, 6, 16 °C, ×10 temperature Same as Unit’s Set Value Set value for refrigeration backwater temperature - 3, 6, 16 °C, ×10 saline water Set value for refrigeration outflow water temperature - 3, 6, 16...
  • Page 82 Description for Modbus protocol interface System’s Cooling Outflow Water °C, ×10 System’s Chilled Water Pump 1-On，0-Off Status System’s Cooling Water Pump 1-On，0-Off Status System’s Chilled Water 1-On，0-Off Three-Way Valve System’s Cooling Water 1-On，0-Off Three-Way Valve Cooling Tower’s Fan and Water 1-On，0-Off Pump Load...
  • Page 83 Description for Modbus protocol interface AI25 1044 AI26 1045 AI27 1046 AI28 1047 AI29 1048 AI30 1049 AI31 1050 AI32 1051 DI17-32 1052 bit0-15:DI17-31,1-ON,0-OFF DI1-16 1053 bit0-15:DI1-16,1-ON,0-OFF DO17-32 1054 bit0-15:DO17-32,1-ON,0-OFF DO1-16 1055 bit0-15:DO1-16,1-ON,0-OFF EXV1 Steps 1056 EXV2 Steps 1057 EXV3 Steps 1058 EXV4 Steps 1059...
  • Page 84 Description for Modbus protocol interface Fault of Outflow Temperature Sensor of System Bit5 Chilled Water ★ Fault of Backwater Temperature Sensor of Bit6 System Cooling Water★ Fault of Outflow Temperature Sensor of System Bit7 Cooling Water ★ Bit8 Exhaust temperature 1-1# sensor fault Bit9 Exhaust temperature 1-2# sensor fault Bit10...
  • Page 85 Description for Modbus protocol interface Bit11 The exhaust gas temperature is too high 2_2 Bit12 Deviation of exhaust gas temperature is too high 1 Bit13 Deviation of exhaust gas temperature is too high 2 Bit14 Low suction gas superheat 1 Bit15 Low suction gas superheat 2 Bit0...
  • Page 86 Content of Toxic and Harmful Substances Content of Toxic and Harmful Substances Toxic or Hazardous Substance or Element Component Hexavalent Polybrominated Polybrominated Cadmium Mercury Name Chromium Biphenyl Diphenyl Ether Lead ( （Cd） (Hg) (Cr (VI)) (PBB) (PBDE) Compressor ○ ○ ○...
  • Page 87 YORK Guangzhou Air Conditioning & Refrigeration Co., Ltd. Phone: +86 763 4681111 Fax: +86 763 4681114 © 2019 Johnson Controls, Inc. www.johnsoncontrols.com FORM NO: 6U6W-A01C-NB-EN SUPERSEDES: 6U6W-A01C-NA-EN * Johnson Controls is committed to the continuous product improvement. Please note the product design may change without notification.

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