Cooper & Hunter NORDIC MULTI LIGHT Series Service Manual
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Summary of Contents for Cooper & Hunter NORDIC MULTI LIGHT Series
- Page 1 NORDIC MULTI LIGHT SERIES Service manual Air conditioners Models: CHML-U36RK4 CHML-U42RK5 Thank you for choosing Cooper&Hunter air conditioner, please read this service manual carefully before operation and retain it for future reference.
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Page 2: Table Of Contents
Service Manual Table of Contents Part Ⅰ : Technical Information ...............1 1. Summary ........................1 2. Specifications ......................2 3. Outline Dimension Diagram ................4 4. Refrigerant System Diagram ..............5 5. Electrical Part ......................6 5.1 Wiring Diagram ........................6 5.2 PCB Printed Diagram ......................8 6. -
Page 3: Part Ⅰ : Technical Information
Service Manual Part Ⅰ : Technical Information 1. Summary Outdoor Unit CHML-U36RK4 CHML-U42RK5 Technical Information... -
Page 4: Specifications
Service Manual 2. Specifications CHML-U36RK4 CHML-U42RK5 Model Rated Voltage 220-240 220-240 Power Rated Frequency supply Phases Cooling capacity(max~min) 10500(2600~12000) 12000(2600~12000) Heating capacity(max~min) 12000(2600~13500) 12000(2600~14500) Cooling Power Input 3100 3450 Heating Power Input 3200 3500 Cooling Current Input Heating Current Input Rated Power Input 4000 4000... - Page 5 Service Manual Cross-sectional Area of Power Cable Conductor Recommended Power Cable(Core) Connection Pipe Connection Method Flare Connection Flare Connection Not Additional Gas Connection Pipe Length Connection Pipe Gas Additional Charge Outer Diameter of Liquid Pipe (Metric)1 Φ6 Φ6 Outer Diameter of Gas Pipe (Metric)1 Φ9.52 Φ9.52 Outer Diameter of Liquid Pipe (Metric)2...
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Page 6: Outline Dimension Diagram
Service Manual 3. Outline Dimension Diagram 1016 1098 Unit:mm Technical Information... -
Page 7: Refrigerant System Diagram
Service Manual 4. Refrigerant System Diagram Heat Exchanger Filter Four-way Valve Silencer High Pressure Swicth Outdoor Unit Compressor Electronic Expansion Valve Gas/Liqiud Separator Filter Stop Valve Heating Cooling Heat Exchanger Indoor Unit Heat Exchanger Heat Exchanger Heat Exchanger Heat Exchanger Schematic Diagram of Free Match Series Inverter Heat Pump System Technical Information... -
Page 8: Electrical Part
Service Manual 5. Electrical Part 5.1 Wiring Diagram ●Instruction Symbol Symbol Color Symbol Symbol Color Symbol Name White GREEN COMP Compressor Yellow Brown Grouding wire Blue YEGN Yellow/Green Black Violet Orange Outdoor Unit ● (1)Model:CHML-U36RK4 60000700131601 Technical Information... - Page 9 Service Manual (2)Model:CHML-U42RK5 60000700132801 These circuit diagrams are subject to change without notice, please refer to the one supplied with the unit. Technical Information...
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Page 10: Pcb Printed Diagram
Service Manual 5.2 PCB Printed Diagram ● Top view 11 12 13 14 1 T25AH 250V: Fuse 2 N: terminals of neureal wire 3 AC-L: terminals of line wire 4 PFC electrocircuit U/V/W: terminals of compressor OVC-COMP: terminals of overload protector LPP: terminals of high pressure switch EVA-EVE: terminals of... -
Page 11: Function And Control
Service Manual 6. Function and Control 1. Function Control 1) Cooling mode a. Turning on the unit for cooling operation, and if any one of the indoor units satisfy the cooling operation condition, the system will start for cooling operation; and the electronic expansion valve, the outdoor fan and the compressor start operation. b. - Page 12 Service Manual 5) System high-pressure protection a. When the high-pressure switch detects the system pressure higher than limit ,then the high-pressure switch cuts off, the system will stop to run. b.If high-pressure protection is detected for two times within one hour, only by cutting off the power and then reenergize that the compressor can restart.
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Page 13: Part Ⅱ : Installation And Maintenance
Service Manual Part Ⅱ : Installation and Maintenance 7. Notes for Installation and Maintenance Safety Precautions: 10. If the power cord or connection wire is not long enough, please get the specialized power cord or connection wire Important! from the manufacture or distributor. Prohibit prolong the wire by yourself. - Page 14 Service Manual Safety Operation of Flammable Refrigerant Qualification requirement for installation and maintenance man ●All the work men who are engaging in the refrigeration system should bear the valid certification awarded by the authoritative organization and the qualification for dealing with the refrigeration system recognized by this industry. If it needs other technician to maintain and repair the appliance, they should be supervised by the person who bears the qualification for using the flammable refrigerant.
- Page 15 Service Manual Safety Precautions for Installing and Relocating the Unit: To ensure safety, please be mindful of the following precautions. Warnings 1. When installing or relocating the unit, be sure to keep the refrigerant circuit free from air or substances other than the specified refrigerant.
- Page 16 Service Manual Main Tools for Installation and Maintenance 1. Level meter, measuring tape 2. Screw driver 3. Impact drill, drill head, electric drill 4. Electroprobe 5. Universal meter 6. Torque wrench, open-end wrench, inner hexagon spanner 7. Electronic leakage detector 8.
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Page 17: Installation Manual
Service Manual 8. Installation Manual Installation procedures Start installation Preparation before installation Read the requirements select installation Prepare tools for electric connection location Select indoor unit Select outdoor unit installation location installation location Install wall-mounting Install the support of outdoor unit (select it according to the actual situation) frame, drill wall holes Connect pipes of indoor... -
Page 18: Preparation Before Installation
Service Manual 8.1 Preparation before Installation 8.1.1 Standard parts Please use the following standard parts supplied by Cooper&Hunter. Pars of Outdoor Unit Remark Quantity Namber Name Picture Owner’s manual Tube connector subassy 8.1.2 Selecting installation site Forbidden Items! It indicates that improper operation might lead to human casualty or sever injury. Items need to be followed. - Page 19 Service Manual When the outdoor unit is totally surrounded by walls, the installation space of the unit should be as required in Fig.1. ＞1000 ＞ ＞2000 ＞ ＞2000 unit:mm Fig.1 8.1.3 Piping Connection The maximum pipe length is shown in the following table. When the distance between units (piping length) is out of the range listed below, normal run of the unit can not be guaranteed.
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Page 20: Installation Instruction
Service Manual 8.2 Installation Instruction 8.2.1 Outline and dimension of the outdoor unit CHML-U36RK4 Outline dimension andMounting holes 1080 Fig.2 CHML-U42RK5 Outline dimension andMounting holes 1080 Fig.3 Installation and Maintenance... - Page 21 Service Manual 8.2.2 Installation of the Connection Pipe Connecting piping for indoor unit and outdoor unit are in manifold mode. (As shown below). Fig.4 1) Piping between the Indoor and Outdoor Units ● If the liquid and gas stop valves which have the sign of A , B, C, D or E have not been connected to the indoor units, please turn off the screw cap with the spanner airproof.
- Page 22 Service Manual 2) Allowable pipe length and drop height among indoor and outdoor units If the total refrigerant pipe length (liquid pipe) is smaller than that listed in the table below, no additional refrigerant will be charged. Model CHML-U36RK4 CHML-U42RK5 Total Liquid Pipe Lenght (a+b+c+d+e) Allowable Length and Height Fall of the Refrigerant Pipe...
- Page 23 Service Manual 3) Installation of the Protection Layer of the Refrigerant Pipe a. The refrigerant pipe should be insulated by the insulating material and plastic tape in order to prevent condensation and water leakage. b. The joints of the indoor unit should be wrapped with the insulating material and no gap is allowed on the joint of the indoor unit, as shown in Fig.7.
- Page 24 Service Manual indoor unit and the refrigerant pipe. ② . The amount of the additional refrigerant charge is dependent on the diameter and length of the liquid refrigerant pipe which is decided by the actual yield installation requirement. ③ . Record the additional refrigerant charge for future maintenance. b.
- Page 25 Service Manual 2) Earthing Requirements ● The air conditioner is classified into the Class I appliances, so its earthing must be reliable. ● The yellow-green line of the air conditioner is the earth line and can not be used for other purpose, cut off or fixed by the tapping screw; otherwise it would cause the hazard of electric shock.
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Page 26: Troubleshooting
Service Manual 9. Troubleshooting 9.1 Malfunction Indicator The error code will be displayed on the wired controller and the main board of the outdoor unit. The meaning of each error, as shown in table 13. The indicator display Name of malfunction Indoor display Yellow light Red light... -
Page 27: Malfunction Checking And Elimination
Communication failure with Unit A Communication failure with Unit A Communication failure with Unit B Communication failure with Unit B Service Manual Communication failure with Unit C Communication failure with Unit C Communication failure with Unit D Communication failure with Unit D Gas pipe temperature sensor malfunction of A Flash 18 times Unit A freeze protection... - Page 28 Service Manual Energize the unit Please check: 1. if the indoor and outdoor heat exchanges are dirty, if there is obstacle to affect the radiation; 2. if the indoor and outdoor fans are running normally; If the above cases are existed? 3.
- Page 29 Service Manual 2. PFC protection malfunction, capacity charging malfunction Main checking points: If the wiring of the induction is connected well and if the induction is broken; If the mainboard is broken; Flow chart: Start Start Check if power supply is normal Check If the power supply is normal Turn on the unit after power supply...
- Page 30 Service Manual 3. Compressor desynchronizing malfunction Main checking points: If the pressure of the system is too high; If the eletric expansion valve is working normally or it is broken; If the radiation of the unit is good; Flow chart: The unit appears desynchronizing as soon as energizing and starting The stop duration of the compressor is longer...
- Page 31 Service Manual Desynchronizing happens during operation Check if fan Replace the fan capacitor Outdoor unit is working? terminal is connected well Improve radiation situation of the unit Unit radiation is good? (such as cleaning Replace the outdoor unit the heat exchanger, improve ventilation Turn on the unit after the power...
- Page 32 Service Manual 4. Compressor overload, diacharge protectionmalfunction Main checking points: If the eletric expansion valve is connected well or it is broken; If there is refrigerant leakage; If the overload protector is broken; Flow chart: Start If the overload protector is connected well? Check the resistance between the two ends of the overload protector in ambient temperature, if the resistance is below 1k...
- Page 33 Service Manual 5. Start failuremalfunction Main checking points: If the connection wire of the compressor is connected properly; If the stop duration of the compressor is sufficient; If the compressor is broken; If the refrigerant charging amount is too much; Flow chart: Energize and start the unit...
- Page 34 Service Manual 6. Temperature sensor malfunction Main checking points: If the temperature sensor is damaged or broken If the terminal of the temperature sensor is loosended or not connected; If the mainboard is broken; Flow chart: Start Check whether the wiring terminal between temperature sensor and controller is loosened or poorly contacted? Insert the temperature...
- Page 35 Service Manual 7. DC fan malfunction Main checking points: If the outdoor fan is blocked by foreign objects; The connection wire of DC fan is connected reliably? If it is loose? Flow chart: Start Turn on the unit Check if the after removing the outdoor fan is blocked by foreign objects...
- Page 36 Service Manual 8. Communication malfunction Main checking points: If the connection wire between the indoor unit and outdoor unit is connected well, if the wires inside the unit is connected well; If the indoor mainboard or outdoor main board is broken; Flow chart: Communication malfunction of some indoor units...
- Page 37 Service Manual All the indoor units appear communication malfunction De-energize,check if the connection wire of indoor and outdoor unit and the wire of the eletric box is connected correctly Reconnect according to Eliminate the malfunction Connected correctly? the wiring diagram De-energize, check if the connection wire between the outdoor mainboard and the filter board according to the wiring diagram...
- Page 38 Service Manual 9. Anti-high temperatureand overload malfunction Main checking points: If the outdoor ambient temperature is within the normal range; If the indoor fan and outdoor fan are running normally; If the indoor and outdoor radiation environment is good; Flow chart: Start It is a normal protection, please If the outdoor ambient temperature...
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Page 39: Maintenance Method For Normal Malfunction
Service Manual 9.3 Maintenance Method for Normal Malfunction 1. Air Conditioner Can't be Started Up Possible Causes Discriminating Method (Air conditioner Status) Troubleshooting Confirm whether it's due to power failure. If yes, No power supply, or poor After energization, operation indicator isn’t bright wait for power recovery. - Page 40 Service Manual 4. ODU Fan Motor Can't Operate Possible causes Discriminating method (air conditioner status) Troubleshooting Connect wires according to wiring diagram to Wrong wire connection, or poor Check the wiring status according to circuit make sure all wiring terminals are connected connection diagram firmly...
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Page 41: Exploded View And Parts List
Service Manual 10. Exploded View and Parts List (1) Model:CHML-U36RK4 10 11 12 13 16 17 18 19 The component picture is only for reference; please refer to the actual product. Part Code Description CHML-U36RK4 Front Grill 26905200121 Handle 26233053 Front Side Plate Sub-Assy 01305508 Front Side Plate... - Page 42 Service Manual Fan Motor 1570280201 Motor Support Assy 000046000051 Reactor 43130186 Compressor and Fittings 009001000231 Compressor Gasket 009012000004 Drainage Joint 26113009 Sensor Sub-assy 39004100006G Compressor Overload Protector(External) 00180030 Bolt 70210051 Electric Expand Valve Fitting 4304413234 Strainer 07210022 Bidirection Strainer 07220016 Cut off Valve 07130239 Electric Expand Valve Fitting...
- Page 43 Service Manual (2) Model:CHML-U42RK5 16 17 18 19 12 13 10 11 The component picture is only for reference; please refer to the actual product. Part Code Description CHML-U42RK5 Front Grill 26905200121 Handle 26233053 Front Side Plate Sub-Assy 01305508 Front Side Plate 01305065P Insulated Board (Cover of Electric Box) 20113003...
- Page 44 Service Manual Fan Motor 1570280201 Motor Support Assy 00046000051 Reactor 43130186 Compressor and Fittings 009001000231 Compressor Gasket 009012000004 Drainage Joint 26113009 Sensor Sub-assy 39004100006G Compressor Overload Protector(External) 00180030 Bolt 70210051 Electric Expand Valve Fitting 4304413222 Strainer 07210022 Bidirection Strainer 07220016 Cut off Valve 07130239 Electric Expand Valve Fitting...
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Page 45: Removal Procedure
Service Manual 11. Removal Procedure Warning: Be sure to wait for a minimum of 20 minutes after turning off all power supplies and discharge the refrigerant completely before removal. CHML-U36RK4 CHML-U42RK5 NOTE: Take CHML-U42RK5 for example. Steps Procedure 1. Before disassembly Complete axonometric drawing. - Page 46 Service Manual Steps Procedure 3. Remove top cover Top cover Remove the screws connecting the top cover with outer case, right side plate and left side plate; lift the top cover upwards to remove it. 4. Remove front side plate Remove the screws connecting the front side plate with chassis and middle isolation sheet, and then remove the front side plate.
- Page 47 Service Manual Steps Procedure 6. Remove grille Remove the 4 screws connecting the grille and outer case, and then remove the panel grille. Grille 7. Remove outer case Outer case Remove screws connecting outer case and motor support, middle isolation sheet and chassis, pull the outer case upwards slightly, loosen clasps between outer case and left side plate, and then remove the outer case.
- Page 48 Service Manual Steps Procedure Motor support 9. Remove blade, motor, motor support a.Remove nuts fixing axial flow blade with wrench, and then remove the axial flow blade. Motor b.Remove screws connecting motor support and chassis, loosen damper block and then remove the motor support.
- Page 49 Service Manual Steps Procedure 12. Remove connection pipe sub-assy Connection pipe sub-assy Remove all spot welds connected with connection pipe, and then remove the connection pipe sub-assy. 13. Remove compressor Compressor Remove the 3 foot nuts fixing compressor and then lift the compressor upwards to remove the compressor and damping cushion.
- Page 50 Service Manual Steps Procedure 15. Remove compressor mounting plate sub-assy Remove the 4 foot nuts fixing compressor mounting plate sub-assy and chassis, to compressor mounting remove the compressor mounting plate sub- plate sub-assy assy. 16. Remove PFC electrical inductance PFC electrical inductance Remove the screws fixing PFC electrical inductance and isolation sheet, to remove the...
- Page 51 Service Manual Steps Procedure 18. Remove left side plate Remove screws connecting left side plate and support plate of condenser, chassis, and then remove the left side plate. Left side plate 19. Remove condenser Remove screws connecting condenser and chassis, and then remove the condenser. Remove screws connecting support plate of condenser and condenser, and then remove the support plate of condenser.
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Page 52: Appendix
Service Manual Appendix: Appendix 1: Reference Sheet of Celsius and Fahrenheit Conversion formula for Fahrenheit degree and Celsius degree: Tf=Tcx1.8+32 Set temperature Fahrenheit Fahrenheit Fahrenheit display Fahrenheit display Fahrenheit display Fahrenheit Celsius （℃） Celsius （℃） Celsius （℃） temperature temperature temperature （℉）... -
Page 53: Appendix 3: Pipe Expanding Method
Service Manual Appendix 3: Pipe Expanding Method Pipe Note: Pipe cutter Improper pipe expanding is the main cause of refrigerant leakage.Please expand the pipe according to the following steps: Leaning Uneven Burr A:Cut the pip ● Confirm the pipe length according to the distance of indoor unit and outdoor unit. ●... -
Page 54: Appendix 4: List Of Resistance For Temperature Sensor
Service Manual Appendix 4: List of Resistance for Temperature Sensor Resistance Table of Ambient Temperature Sensor for Indoor and Outdoor Units(15K) Temp( C) Resistance(kΩ) Temp( C) Resistance(kΩ) Temp( Resistance(kΩ) Temp( Resistance(kΩ) 138.1 18.75 3.848 1.071 128.6 17.93 3.711 1.039 121.6 17.14 3.579 1.009... - Page 55 Service Manual Resistance Table of Tube Temperature Sensors for Indoor and Outdoor (20K) Temp( C) Resistance(kΩ) Temp( C) Resistance(kΩ) Temp( Resistance(kΩ) Temp( Resistance(kΩ) 181.4 25.01 5.13 1.427 171.4 23.9 4.948 1.386 162.1 22.85 4.773 1.346 153.3 21.85 4.605 1.307 20.9 4.443 1.269 137.2...
- Page 56 Service Manual Resistance Table of Discharge Temperature Sensor for Outdoor(50K) Temp( C) Resistance(kΩ) Temp( Resistance(kΩ) Temp( C) Resistance(kΩ) Temp( Resistance(kΩ) 853.5 18.34 4.75 799.8 93.42 17.65 4.61 89.07 16.99 4.47 703.8 84.95 16.36 4.33 660.8 81.05 15.75 4.20 620.8 77.35 15.17 4.08 580.6...
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