Инструкция на Чиллеры MDV серии King Plus бренда MDV

Service

Manual King Plus Series

таблицы и схемы — в просмотре

Part 1

General Informa�on 1 Product lineup 4 2 Opera�ng Limits 5 Part 1 - General Information 4

1 Product lineup

2 Operating Limits

2.1 Cooling operating range 60 Outdoor temperature (℃) -10 -20 -5 Outlet water temperature (℃) ① Normal mode ② Low leaving water temperature mode Part 1 - General Information Notes: Low leaving water temperature mode can be set through wired controller, please refer to the Operation Manual for…

таблицы и схемы — в просмотре

Part 2

Component Layout and Refrigerant Circuits 2 Piping Diagrams 14 8 Part 2 - Component Layout and Refrigerant Circuits 1 Layout of Func�onal Components 8

130kW

Component list 9 1 Axial flow fan 2 Brushless DC Motor 3 Motor holder assembly 4 Electric control box assembly 5 Compressor(fixed) 6 Shell and tube exchanger 7 Four-way valve assembly 8 Gas-liquid separator 9 Input pipe assembly 10 Input pipe assembly 11 Four-way valve assembly 12 Suction pipe…

185kW

No. Name 1 Top cover 2 Compressor 3 Evaporator 4 Water outlet 5 Electric control box 6 Water inlet 7 Condenser 10

260kW

11 1 Axial flow fan 2 Brushless DC Motor 3 Motor holder assembly 4 Condenser part 5 Electric control box assembly 6 Fixed speed scroll compressor 7 Four-way valve assembly 8 Suction pipe assembly 9 Gas-liquid separator 10 Input pipe assembly 11 Input pipe assembly 12 Four-way valve assembly 13 Shell…

2 Piping Diagrams

Legend

1 Compressor 12 High Pressure sensor 2 4-Way Valve 13 An�freeze low pressure switch 3 Gas-Liquid separator 14 Capilary 4 Air side heat exchanger 15 Evapora�on sensor in heating(Condenser sensor in cooling) 5 Electronic expansion Valve 16 Outdoor temperature sensor 6 Single-way electromagne�c valve…

185Kw

Part 2 - Component Layout and Refrigerant Circuits The table below describes the symbols. Symbol Symbol explanation Symbol Symbol explanation Stop valve Y-shaped filter Pressure gauge Thermometer Water flow switch Circula�ng pump Gate valve Check valve Flexible joint Automa�c discharge valve 14

1 General Control Scheme Flowchart

2 Stop opera�on ▪ Abnormal shutdown ▪ System stops 3 Standby control ▪ Crankcase heater control ▪ Water pump control 7 Special control On Startup control ▪ Compressor startup delay control ▪ Startup control for hea�ng opera�on ▪ Startup control for cooling operation On ▪ Outdoor unit duty cycling ▪…

2 Stop Opera�on

The stop opera�on occurs for one of the following reasons: Abnormal shutdown: in order to protect the compressors, if an abnormal state occurs the system makes a stop with thermo off operation and an error code is displayed on the unit PCB digital displays and on the user interface. The system stops…

4.3 Startup Control for Cooling Operation

Wiring diagram label 130kW 260kW Control functions and states Compressor Component COMP ● ● DC fan motor FAN ● ● Electronic expansion valve EXV ● ● Four-way valve 4-WAY ● ● On The fan is turned on according to the ini�al wind speed corresponding to the ambient temperature. Posi�on (step) from 0…

5.5 Electronic Expansion Valve Control

The position of the electronic expansion valve (EXV) is controlled in steps from 0 (fully closed) to 480 (fully open). At power-on: The EXV is first fully closed and then moved to the standby position (480 (steps)). Within 1min after the compressor is turned on, the EXV maintains the standby…

6.2 Duty cycling

In cascade system, outdoor unit duty cycling is used to balance the compressor running time. The master unit controls the start and stop of slave units according to the total leaving water temperature. The 0# master unit will turn on first and then 1#~15# slave unit turns on in order. For offloading…

7 Control so�ware for 185kW

1） The LOGIN window as above picture. 2） User need to input the name and password (default name: Admin, default password: Admin); user’s name and password could be changed a�er login. 3） Select the computer serial port. The system default selection is COM1 (the so�ware will checkout the available…

6） When provide a wrong USERE’S NAME, the window as Fig.4-3 will be display, while PASSWORD error,

the window shows as Fig.4-4. Fig.4-3 & Fig.4-4 7） In case the password error time exceed 6 times (i.e. the 7th times password error), the window show as Fig.4-5, and then click OK, it will exit the program. Fig.4-5 Part 3 - Control 8） In case the selected serial port is unavailable, the window as…

1） Menu includes：

“ System” “ Equipment management” “ Schedule management” “ Communica�on parameter” “ Help” 2） System configuration illustration (The ① as Fig.4-7): Not more than16 wired controllers could be connected to the computer. This kind of wired controller could be connected to the module group of : 25KW…

Fig.4-9

Provided that malfunction occur, window as Fig.4-10. Fig.4-10 Menu application Part 3 - Control 1） “System” includes： “Password Modification” “Re-login” “Exit the program”. Fig.4-11 ① Click “Password Modification” will display window as Fig.4-12 input old password as requirement, and then reset a…

Fig.4-13

If input an old password error, window as Fig.4-14 will show; if the new passwords be input do not match, the message box as Fig.4-15 will display. MDV King Plus Service Manual Fig.4-14 Fig.4-15 ②Click “Re-login”, window as Fig. 4-16 will display that interface ask user whether re-login the system…

Fig.4-18

① Click “KJR Setting”, the window as Fig. 4-20 will be display——add wired controller to the system to be monitored. Fig.4-20 a Add a wired controller: Select the wired controller address (0-15) at the “KJR Address”, fill the wired controller name at “KJR Name” and click “Save”. b Modify wired…

Fig.4-23

Fig.4-24 Note: Please select wired controller according to actual system condition. MDV King Plus Service Manual ② Click the “Module parameter setting”, a window as Fig.4-25 will pop up: add module group under connect with the wired controller Fig.4-25 a Add sub-module: Select the exis�ng wired…

drop-down box of “Sub-module address”), and click “Delete” to finish this operation

3） “Schedule management” includes: “Weekly timing setting” and “Error record” .See Fig. 4-28 Fig.4-28 ① Click “Weekly timing set” a window as Fig. 4-29 would pop up——finish the weekly schedule management setting, each wired controller represents a refrigeration system; and the existing wired…

then the Weekly Timing Function displays ON, while the key shows OFF （see Fig. 4-32）

Fig.4-30 MDV King Plus Service Manual Fig.4-31 Fig.4-32 e Save（See the ② key in the Fig.4-29）―― Save the current se�ngs or the modified se�ngs f Modify(See the ③ key in the Fig.4-29) ――Press this key the parameter of selected period become changeable, and then click “ Save ” . Press the key again…

Fig.4-34

g Delete key (See the ④ key in the figure) ――select a Period and click the key, the current selected Weekly Timing setting period could be deleted. Click the key, window as Fig. 4-35 shows, click “OK” to delete Period. Successful delete the Period, message box as Fig. 4-36 will show. Part 3…

Mode set：Operation mode: Cooling, Heating, Water Pump

Se�ng temp.：Se�ng temp. Note: The ON/OFF time of the weekly �ming can not be at the same �me point, the following will be not allowed for example if the ON time was 8:00 of Period1 and the OFF �me was 8:00; and the OFF time of Period1 was 10:00 and the ON time of Period2 was 10:00. If there is error…

b Select a wired controller: By clicking the Period of the “System diagram for weekly timing AC” at the le� side in the wired controller, or by selecting the wanted modified Period at the drop-down box of “Period”. c Detail parameter for modifying weekly �ming schedule: Time On：Turn on time, when…

Fig.4-48

Fig.4-49 MDV King Plus Service Manual 4)“Communication parameter” includes： “ Serial port set”and “History set” .See Fig.4-50. Fig.4-50 ① Click “Serial port set”, window as Fig. 4-51 will pop up—— modify or select the serial port in computer. The available serial port source is captured by so�ware…

Fig.4-54

5)“Help” includes： “User guidance” and “About”. See Fig. 4-55. Fig.4-55 ① Owner’s manual——Software application manual, i.e. this manual. ② About——some relevant so�ware informa�on. Wired controller lock/unlock Fig.4-56 Fig.4-57 34 Part 3 - Control Provided that the selected wired controller in unlock…

Fig.4-58

MDV King Plus Service Manual Fig.4-59 Fig.4-60 Provided that the selected wired controller in lock status, the key would display “Unlock KJR”(see Fig. 4-61), once successful unlock the wired controller, the message box (see Fig. 4-62) would display, then the key displays “Lock KJR”(see Fig. 4-63)…

Fig.4-63

Fig.4-64 Query system parameter Click “Query system parameter”, system will query the operating status (display the sub-module of 0 address’s operation status) and display the operative interface according to the selected wired controller (refrigeration system). In the querying, a message box (see…

Fig.4-67

Whereas, “Query overtime” would display (see Fig. 4-68). Provided that the wired controller hasn’t been selected, namely the wired controller address is empty, a message box as Fig 4-69 would pop up. The query performance failed MDV King Plus Service Manual Fig.4-68 Fig.4-69 Provided that…

Sub-module Query

Click the “Query”, system will query the operative status and display the informa�on in the opera�on interface according to the current selected sub-module. In the querying, a message box (see Fig. 4-72) would pop up: “Query success” (see Fig. 4-73) to note you the query is successful and update the…

Fig.4-74

Fig.4-75 Fig.4-76 Provided that malfunction occur, the corresponding error code will show in the Sub-module query; Provided that protection func�on perform, the corresponding protection code will show in the Sub-module query; if move the mouse arrow to the these codes, a floating window as the…

Fig.4-78

More parameters Click More Parameters, you could query more data (See Fig.4-79). If the sub-module hasn’t been selected, a message box as Fig. 4-80 would show. You must click a certain sub-module firstly, and then to click the “More parameters” key, more parameter could be queried; a message box…

Fig.4-80

Fig.4-81 System operate set 1） During setting, message boxes as following might display. Click the “System operate set” in the condi�oner of without wired controller has been selected, a message box as Fig. 4-82 would show. Fig.4-82 Click the “System operate set” in the condi�oner of although the…

Fig.4-84

Click the “System operate set” in the condi�oner of without Control Mode has been selected, a message box as Fig. 4-85 would show. Fig.4-85 Fig.4-87 2) Set wired controller separately: Do not tick the “Uniformly Set”. Select the wanted set wired controller (refrigeration system) from the wired…

Fig.4-88

Fig.4-89 Fig.4-90 Fig.4-91 3) Uniformly set all wired controllers: Tick Uniformly Set as Fig. 4-92, and then select the corresponding parameters, click the System Operate Set, system starts to set up. A message box as Fig. 4-93 will display during the se�ng. Once successful setting, a message box as…

Fig.4-92

Fig.4-93 Part 3 - Control Fig.4-94 Fig.4-95 Fig.4-96 Remark The computer can use the names of serial ports for querying: 1 Right-click the “My Computer” and select the “Properties” as Fig. 4-97. 44

Fig.4-97

Fig.4-98 2 The window “System Proper�es” will be popped-up a�er selecting the “Properties”, and then select the “Device Manager” in the “Hardware” as Fig. 4-98 3 The window “Device Manager” will be showed up after clicking the “Device Manager, as Fig. 4-99. 45

Fig.4-100

4 Click the icon “ ” in front of the “Ports（COM&LPT） ”, then can view the port names by the format as “COM” +number, these names are the usable serial port names for the computer (Note: the computer may has more serial ports or no ports), as Fig. 4-100. Part 3 - Control 46

MDVM-130BR1-KS

Part 4 - Diagnosis and Troubleshoo�ng Version: C DIP switch ON OFF(Default) S1-1 Reserved Reserved S1-2 Reserved Reserved S1-3 Low leaving water temperature mode Normal leaving water temperature mode S1-4 Reserved Reserved S2-1 Remote on/off, heating/cooling is effective Remote on/off…

Part 4 - Diagnosis and Troubleshooting

CN1

MDVM-130BR1-KS

First layer of control box Current MDV King Plus Service Manual transformer AC contactor Terminal block AC contactor Main PCB Second layer of control box Fan module PCB 51 Reactance

MDVM-260BR1-KS

Part 4 - Diagnosis and Troubleshoo�ng Label components and parts 1 AC contactor 2 Current transformer 3 Wire joint 4 Module board assembly 5 Main control board assembly 6 Reactor 7 Wire joint 52

3 PCB Introduction

3.1 Main PCB for 130/260kW Main PCB component MDV King Plus Service Manual Explanation Label Code Voltage 1 CN19 Power supply 380VAC 2 CN27 Weak current power supply (+12VDC) 12VDC 3 CN26 Metering ports 5VDC 4 CN78 XYE interface of wire controller 5VDC 5 CN20 USB programming port 5VDC 6 CN34 Main…

CN49 A System exhaust protection port 5VDC 18 CN46 Port for detec�ng ambient temperature 5VDC 19 CN54 A System compressor protection 12VDC 20 CN53 B System compressor protection 12VDC 21 CN39 Port for the an�freeze temperature sensor 5VDC 22 CN40 Total water temperature sensor interface 5VDC 23 CN38…

3.2 Fan Module Board

Fan Module Board component MDV King Plus Service Manual 5 Label 55 Code Explanation Voltage 1 CN2 Fan 1 Power UVW port AC high voltage 2 CN10 Fan 2 Power UVW port AC high voltage 3 CN1/CN4 Fan module communication port 5VDC 4 CN30 Master chip program burner 5VDC 5 CN11 Fan module power supply L1L2L3…

3.3 PCB Outline and Description for 60kW

PCB outlook view Part 4 - Diagnosis and Troubleshoo�ng No. Detail information 1 Detection of current of the compressor B (protec�on code P5) Detection of current of the compressor A (protection code P4) Current is not detected within the ini�al 5 seconds a�er the compressor is started up. When the…

MDV King Plus Service Manual T4: outdoor ambient temperature sensor (fault code E7) T3B: pipe temperature sensor of the condenser B (fault code E6 and protec�on code P7) T3A: pipe temperature sensor of the condenser A (fault code E5 and protec�on code P6) 1) T4: if there is one system that requires…

11 12 COM (O) 485 communication port (fault code E2) COM (I) 485 communication port (fault code E2) COM (O) is interconnected with P, Q and E of COM (I), used for RS-485 communica�on. 1) If faults occur between the wired controller and the main unit module, all modules will be shut down. 2) If…

2) Subordinate unit: (water flow detection will not be done)

16 Control port (reserved) 17 Electronic expansion valve of the system B 18 Electronic expansion valve of the system A Electronic expansion valve is used to control refrigerant flow under different opera�ng modes and different loads. Auxiliary electric heater A�ention: the control port value of…

28 29 Input of transformer, 220-230V AC current. (only valid for the main unit) Input of three-phase four-wire power supply (fault code E1) Three phases A, B and C of power supply should exist simultaneously, and the difference of phase angle should be 120º among them. If the condi�ons are not met…

3.6 PCB Outline and Description for 185kW

PCB outlook view Part 4 - Diagnosis and Troubleshoo�ng Components description No. Detail information Detection of current of the compressor A1 (Protec�on code P4). 1 Detection of current of the compressor B1 (Protec�on code P5). Current is not detected within the ini�al 5 seconds a�er the compressor…

4 MDV King Plus Service Manual 5 6 temperature drops below the recovery temperature 60℃. Another system will be not affected. 3) T4, T3B and T3A: when the temperature sensor is detected to suffer open circuit or short circuit, fault alarm will occur. When the main unit suffer fault of temperature…

COM (O) 485 communication port (fault code E2) COM (I) 485 communication port (fault code E2) COM (O) is interconnected with P, Q and E of COM (I), used for RS-485 communica�on. If faults occur between the wired controller and the main unit module, all modules will be shut down. If faults occur…

MDV King Plus Service Manual Electronic expansion valve is used to control refrigerant flow under different opera�ng modes and different loads. Auxiliary electric heater A�ention: the control port value of auxiliary electric heater actually detected is ON/OFF but not 220-230V control power supply…

Remote control port(ON/OFF signal, effect on NO.0 unit) 1 Dial the code S7 in the main control board to the “ON” posi�on and enter to the remote control mode (the wire controller is invalid) 2 If the port is closed, the unit is turned on, else,the unit is turned off. Remote mode control port(ON/OFF…

4 Error Code Table

4.2 MDVM-130BR1-KS Content MDV King Plus Service Manual Code E1 Power phase sequence error E2 Communica�on error E3 Total water outlet temperature sensor error E4 Outlet water temp sensor error E5 Pipe temperature sensor error in condenser A E6 Pipe temperature sensor error in condenser B E7 Outdoor…

67 No Code Trouble 1 E0 Error of outdoor EEPROM 2 E1 Power phase sequence error 3 E2 Communication error 4 E3 Total water outlet temperature sensor error (Be valid for main unit) 5 E4 Unit outlet water temperature sensor error 6 E5 Pipe temperature sensor error in condenser A 7 E6 Pipe temperature…

4.5 MDVM-260BR1-KS

Code Content Power phase sequence error E2 Communica�on error E3 Total water outlet temperature sensor error E4 Outlet water temp sensor error E5 Pipe temperature sensor error in condenser A E6 Pipe temperature sensor error in condenser B E7 Outdoor ambient temperature sensor error E8 Power…

5 Troubleshooting

5.1 Warning Warning ▪ All electrical work must be carried out by competent and suitably qualified, certified and accredited professionals and in accordance with all applicable legislation (all national, local and other laws, standards, codes, rules, regulations and other legislation that apply in a…

5.3 E1, E8 Troubleshooting

Digital display output Procedure E1: Power phase sequence error E8: Power protector output error Phase sequence error. Yes Adjust connecting wire. Yes Check power supply. Yes Replace phase lack protector. No Part 4 - Diagnosis and Troubleshoo�ng Lack of phase. No Phase lack protector is broken. No…

5.4 E2 Troubleshooting

Digital display output Procedure E2: Communica�on error No power input to unit or wired controller. Yes Inspect power supply. Yes Reconnect the communication wire or change a No Communication wire between main PCB and wired controller is disconnected or damaged new communication wire MDV King Plus…

Digital display output Procedure E3: Total water outlet temperature sensor error E4: Total water outlet temperature sensor error E5: Pipe temperature sensor error in condenser A E6: Pipe temperature sensor error in condenser B E7: Outdoor ambient temperature sensor error Eb: An�-freezing temperature…

5.6 E9 Troubleshooting

Digital display output Procedure E9: Water flow detection error Valve is not opened in the water system Yes Open the valve. Yes Adjust the installa�on posi�on properly Yes Ensure the water flow switch is connected No MDV King Plus Service Manual Water flow switch is not installed properly. No Water…

Designed the water pipe inner dimension is too less

Yes Replace water pipe. No Replace main PCB Part 4 - Diagnosis and Troubleshoo�ng 74

5.7 EC Troubleshooting

Digital display output Procedure EC: Wired controller detected that the units online have decreased Power supply of slave unit is abnormal. Yes Make sure the power supply is normal. Yes Reconnect the communication wire or change a No Communication wire between master unit and slave unit is abnormal.…

5.8 F3 Troubleshooting

Digital display output Procedure F3: Fan module communica�on error Communication between fan module PCB and Yes main PCB is abnormal Reconnect the communication wire or change a new communication wire No electromagnetic radia�on such as transformer or strong fluorescent lamp Yes Part 4 - Diagnosis…

5.9 H7 Troubleshooting

Digital display output Procedure H7: Voltage protection Yes The power supply range is out of 182~255V Adjust the power supply range to 182~255V No MDV King Plus Service Manual Replace the main PCB. Protection logic Normal opera�on Voltage ≥ 255V for 5s Voltage < 250V Or Or Voltage ≤ 182V for 5s…

5.10 H8 Troubleshooting

Digital display output Procedure H8: High pressure sensor error Sensor is not installed Yes Installed the sensor Yes Ensure the sensor is connected properly Yes Replace the sensor No Part 4 - Diagnosis and Troubleshoo�ng Sensor connection on main PCB is loose No Sensor has short-circuited or failed…

Digital display output Procedure 1PU: fan A protec�on 2PU: fan B protec�on MDV King Plus Service Manual Fan speed is less than 80rpm after starting for 40s Yes Change the fan motor No Replace the main PCB Protection logic Normal opera�on Fan speed is less than 80rpm after starting for 40s Fan motor…

5.12 P0, P2 Troubleshooting

Digital display output Procedure P0: High pressure or air discharge temperature protection in system A P2: High pressure or air discharge temperature protection in system B High pressure sensor is not installed Installed the high pressure sensor Yes Ensure the high pressure sensor is connected Part…

P0: High pressure or air discharge temperature

protection in system A P2: High pressure or air discharge temperature protection in system B Discharge temperature switch is not installed Yes Installed the discharge temperature switch Yes Ensure the discharge temperature switch is No Discharge temperature switch connection on main PCB is loose…

5.13 P1, P3 Troubleshooting

Digital display output Procedure P1: Low pressure protection in system A P3: Low pressure protection in system B Low pressure sensor is not installed Yes Installed the low pressure sensor Yes Ensure the low pressure sensor is connected No loose Part 4 - Diagnosis and Troubleshoo�ng Low pressure…

5.14 P4, P5 Troubleshooting

Digital display output Procedure P4: Current protection in system A P5: Current protection in system B Yes Abnormal power supply. Check power supply, start up the unit after normal power supply. No The fan motor stopped running in cooling mode, reversal and run Yes Check the fan motor, capacitor (1…

5.15 P9 Troubleshooting

Digital display output Procedure P9: Protection of outlet and inlet water temperature difference Outlet and inlet water temperature sensor is not Yes installed Installed the outlet and inlet water temperature sensor No Yes connection on main PCB is loose Part 4 - Diagnosis and Troubleshoo�ng Outlet…

5.16 PA Troubleshooting

Digital display output Procedure PA: Low ambient temperature drive-up protection DIP switch set�ng: S2-3 is ON Yes Set the S2-3 as OFF No MDV King Plus Service Manual Ambient temperature sensor is not installed Yes Installed the ambient temperature sensor Yes Ensure the ambient temperature sensor is…

5.17 Pb Troubleshooting

Digital display output System in standby mode, total outlet water temperature below 2℃, triggers Pb an�-freeze. Procedure Pb: System an�-freezing protec�on Anti-freezing temperature sensor is not installed Yes Installed the an�-freezing temperature sensor Yes Ensure the an�-freezing temperature…

5.18 PC, Pd Troubleshooting

Digital display output Procedure PC: Anti-freezing pressure protec�on in system A Pd: Anti-freezing pressure protection in system B Yes Water pump didn’t operate or error. Open the pump or change; inspect the power supply or control circuit of pump. No MDV King Plus Service Manual Anti-freezing…

5.19 PE Troubleshooting

Digital display output Procedure PE: Low-temperature protection of evaporator Anti-freezing temperature sensor Taf ≤3℃ for 10S Yes Wait un�l the process finishes. No Part 4 - Diagnosis and Troubleshoo�ng Replace the main PCB 88

5.20 PH Troubleshooting

Digital display output Procedure PH: Inlet and outlet water difference protection Water temperature sensor is not installed Yes Installed the water temperature sensor Yes Ensure the water temperature sensor is No Water temperature sensor connection on main MDV King Plus Service Manual PCB is loose…

5.21 H0 Troubleshooting

Digital display output Procedure H0: Outlet water temperature too low protection Outlet water temperature sensor is not installed Yes Installed the outlet water temperature sensor Yes Ensure the outlet water temperature sensor is No main PCB is loose Part 4 - Diagnosis and Troubleshoo�ng Outlet…

5.22 1F6, 2F6 Troubleshooting

Digital display output Procedure 1F6: EXV A protection MDV King Plus Service Manual 2F6: EXV B protection EXV coil connection on main PCB is loose Yes Ensure the EXV coil is connected properly Yes Fix the wire problem. No The wire between coil and main PCB is damaged No Replace the main PCB 91

5.23 Troubles and Solutions for 185kW

Troubles and Solu�ons Troubles Possible reasons Solu�ons Air or other non-condensing gas s�ll in Discharge gas from refrigerant charging inlet. Re- the system. vacuum the system if necessary. Fins in the condenser are dirty or foreign substance blocking fins. Clean condenser fins. Insufficient…

one

Compressor stops because of high pressure protection. Over high air expelling pressure. High pressure switch error. See “Over high air expelling pressure”. Upon error have been confirmed, please replace a new one. Over high air expelling pressure and air See “Over high air expelling pressure” and…

Мм

High pressure and discharged Yes Discharge temperature protection. Blower stops rotating or rotates in Yes reversed direction in cooling mode, water pump is not open or the flow. No Couldn't start the EXV. Yaa y No Pressure controller is broken Yes or the joint is loose. No * Fin heat exchanger in…

МО\ King Plus Service Manual

King Plus Discharge temperature protection. у Yes Discharge temperature Yes Replace discharge switch is broken or joint is temperature switch, ое. fixed joint. 7 № Refrigerant is too less. Yes Detect leakage for all system, append VL refrigerant. у № —ЫмММ Couldn’t open the EXV. Yes Replace the EXV…

3) Current protection

Part 4 - Diagnosis and Troubleshoo�ng 4) High temperature protection of condenser 96

5) Inlet &outlet water temperature difference protec�on

MDV King Plus Service Manual 6) Low ambient temperature star�ng up protection 7) Low temperature anti-freezing protection of cooling evaporator 97

8) Power supply phase sequence malfunction

Part 4 - Diagnosis and Troubleshoo�ng 9) Communication malfunction 98

МО\ King Plus Service Manual

King Plus 10) Water flow detection malfunction 99 ( Water flow detection malfunction } ] vs [ Water pump didn't open or error. = Open the pump or change; inspect the power supply or control circuit of pump. Yes cs Zz The water flow detection switch Yes error. iz Г The water flow switch installed у…

11) Total outlet water temperature sensor malfunc�on

Part 4 - Diagnosis and Troubleshoo�ng 12) The unit outlet water temp. sensor malfunction 100

13) The unit inlet water temperature sensor malfunction

14) Pipe temp. sensor of condenser malfunc�on 101

Мм King Plus

15) Ambient temperature sensor malfunction r Ambient temperature cers | malfunction. Yes у Уез The circuit. of ambient, [Replace temperature sensor. | temperature sensor is broken. No р The circuit. о ambient Yes temperature sensor is shorten. Replace temperature sensor. ] No у Yes The joint of…

5.24 Trouble shooting for 60/120/180

Troubles and Solutions for 60/120/180 Troubles Possible reasons Air or other non-condensing gas s�ll in the system. Fins in the condenser are dirty or foreign substance blocking fins. Discharge gas from refrigerant charging inlet. Re-vacuum the system if necessary. Clean condenser fins. Insufficient…

one

Compressor stops because of high pressure protection. Over high air expelling pressure. High pressure switch error. See “Over high air expelling pressure”. Upon error have been confirmed, please replace a new one. Over high air expelling pressure and air suction See “Over high air expelling…

таблицы и схемы — в просмотре

6 Temperature Sensor Resistance Characteris�cs

Outdoor ambient temperature sensor, air side heat exchanger pipe temperature sensor resistance characteris�cs Resistance Temperature Resistance Temperature Resistance Temperature Resistance (°C) (kΩ) (°C) (kΩ) (°C) (kΩ) (°C) (kΩ) -20 106.732 20 12.635 60 2.35 100 0.609 -19 100.552 21 12.05 61 2.264…

Leaving water temperature sensor, entering water temperature and total leaving water temperature sensor resistance characteristics MDV King Plus Service Manual Temperature Temperature (°C) Resistance (kΩ) Temperature (°C) Resistance (kΩ) Temperature (°C) Resistance (kΩ) (°C) Resistance (kΩ) -20…

6.2 Temperature-Resistance characteristic sheet for discharge temperature sensor of digital compressor for 200kW Sensor characteristic sheet Unit：temp: ℃--K, Ratio: KΩ 109 Temp Ra�o Temp Ra�o Temp Ra�o Temp. Ra�o Temp. Ra�o -40 -39 -38 -37 -36 -35 -34 -33 -32 -31 -30 -29 -28 -27 -26 -25 -24 -23 -22…

253.68280 241.24720 229.49960 218.40560 25.67960 24.75080 23.85640 23.00500 4.69216 4.56660 4.44620 4.32322 1.21948 1.19368 1.16788 1.14208 Part 4 - Diagnosis and Troubleshoo�ng 110

Ver. 2025-05

MDV Professional Equipment Midea Group Add.: Midea Headquarters Building, 6 Midea Avenue, Shunde, Foshan, Guangdong, China Postal code: 528311 MDV reserves the right to change the specifica�ons of the product, and to withdraw or replace products without prior notifica�on or public announcement. MDV…

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