Sinclair MULTI VARIABLE Series Service Manual
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Sinclair MULTI VARIABLE Series Service Manual

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SERVICE MANUAL
MULTI VARIABLE SERIES
MV-E14BI, MV-E18BI

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Summary of Contents for Sinclair MULTI VARIABLE Series

  • Page 1 SERVICE MANUAL MULTI VARIABLE SERIES MV-E14BI, MV-E18BI...
  • Page 2 “Original instructions”   IMPORTANT NOTE: Read this manual ca r efully befo r e installing or operating your new air conditioning unit. Make sure to save this manual for future reference.

  • Page 3: Table Of Contents

    Service Manual Table of Contents Part Ⅰ : Technical Information ................1 1. Summary ..........................1 2. Specifications ........................2 3. Outline Dimension Diagram ................6 4. Refrigerant System Diagram ................7 5. Electrical Part ........................8 5.1 Wiring Diagram .........................8 5.2 PCB Printed Diagram ......................10 6.

  • Page 4: Part Ⅰ : Technical Information

    Service Manual Part Ⅰ : Technical Information 1. Summary Outdoor Unit MV-E14BI MV-E18BI...

  • Page 5: Specifications

    Service Manual 2. Specifications Model MV-E14BI Product Code CB228W08401 Rated Voltage 220-240 Power Rated Frequency supply Phases Cooling capacity 4100 Heating capacity 4400 Cooling Power Input 1200 Heating Power Input 1180 Cooling Current Input 5.32 Heating Current Input 4.53 Rated Power Input 1780 Rated Current 7.90...
  • Page 6 Service Manual Cross-sectional Area of Power Cable Conductor Recommended Power Cable(Core) Connection Pipe Connection Method Flare Connection Not Additional Gas Connection Pipe Length Connection Pipe Gas Additional Charge Outer Diameter of Liquid Pipe Φ6 (Metric) Outer Diameter of Gas Pipe Φ9.52 (Metric) Outdoor...
  • Page 7 Service Manual Model MV-E18BI Product Code CB228W08501 Rated Voltage 220-240 Power Rated Frequency supply Phases Cooling capacity 5200 Heating capacity 5400 Cooling Power Input 1450 Heating Power Input 1300 Cooling Current Input 6.43 Heating Current Input 5.77 Rated Power Input 1.78 Rated Current SEER...
  • Page 8 Service Manual Cross-sectional Area of Power Cable Conductor Recommended Power Cable(Core) Connection Pipe Connection Method Flare Connection Not Additional Gas Connection Pipe Length Connection Pipe Gas Additional Charge Outer Diameter of Liquid Pipe Φ6 (Metric) Outer Diameter of Gas Pipe Φ9.52 (Metric) Outdoor...

  • Page 9: Outline Dimension Diagram

    Service Manual 3. Outline Dimension Diagram Unit:mm...

  • Page 10: Refrigerant System Diagram

    Service Manual 4. Refrigerant System Diagram outdoor indoor filter A heat exchanger filter outdoor heat exchanger 4-way valve B heat exchanger filter high pressure switch discharge silencer C heat exchanger discharge temperature sensor filter D heat exchanger gas -liquid separator filter A1:A－unit electronic expansion valve B1:B-unit electronic expansion valve C1:C-unit electronic expansion valve D1:D-unit electronic expansion valve...

  • Page 11: 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 ● 6361000012602 These circuit diagrams are subject to change without notice, please refer to the one supplied with the unit.

  • Page 12: Pcb Printed Diagram

    Service Manual 5.2 PCB Printed Diagram ● Top view Overload protection terminal of compressor Terminal of temperature sensor High-pressure protection terminal Low-pressure protection terminal Terminal of outdoor fan Electric heating terminal of chassis 4-way valve terminal Electric heating terminal of compressor Terminal of electronic expansion valve A Terminal of electronic...

  • Page 13: Function And Control

    Service Manual 6. Function and Control 1 Basic functions of the system 1.1 Cooling Mode 1.1.1 Cooling conditions and process: If the compressor is in stop status and start the unit for cooling operation, when one of the indoor units reaches the cooling operation condition, the unit start cooling operation;...
  • Page 14 Service Manual 1.3.3 Outdoor fan control in heating mode The outdoor fan starts before 5s of the starting of compressor and then it will run in high speed for 40s; The fan shall run at every speed for at least 80s; When the compressor stops, the outdoor fan stops after 1min.
  • Page 15 Service Manual 2.4 Communication malfunction Detection of the quantity of installed indoor units: After 3min of energizing, if the outdoor unit does not receive the communication data of certain indoor unit, the outdoor unit will judge that indoor unit is not installed and will treat it as it is not installed. If the outdoor unit receives the communication data of that indoor unit later, the outdoor unit will treat that unit as it is installed.

  • Page 16: 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 17 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 18 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 19 Service Manual To ensure safety, please be mindful of the following precautions. ●When installing or relocating the unit, be sure to keep the refrigerant circuit free from air or substances other than the specified refrigerant. Any presence of air or other foreign substance in the refrigerant circuit will cause system pressure rise or compressor rupture, resulting in injury.
  • Page 20 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.

  • Page 21: 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 22: Electrical Connections

    Service Manual 8.1 Electrical Connections 1. Remove the handle at the right side plate of the outdoor unit (one screw). 2. Remove the cable clamp, connect the power connection Handle cable with the terminal at the row of connection and fix the connection.

  • Page 23: Installing The Outdoor Unit

    Service Manual 8.2 Installing the Outdoor Unit Install the drain fitting and the drain hose(for model with Use bolts to secure the unit to a flat, solid floor. Install the drain fitting and the drain hose(for heat pump only) When mounting the unit on a wall or the roof, make Do not install the outdoor unit in pits or air vents model with heat pump only) sure the support is firmly secured so that it cannot...

  • Page 24: Installation Dimension Diagram

    Service Manual 8.3 Installation Dimension Diagram Use suitable instruments for the refrigerant R32. ● Do not use any other refrigerant than R32. Do not use mineral oils to clean the unit. 50cm or more The installation must be done by trained and qualified service personnel with reliability according to this manual. Space to the cover 50cm or more...

  • Page 25: Check After Installation

    Service Manual 8.4 Check after Installation Check Items Problems Owing to Improper Installation Is the installation reliable? The unit may drop, vibrate or make noises May cause unsatisfactory cooling (heating) Has the gas leakage been checked? effect Is the thermal insulation of the unit May cause condensation and water dropping sufficient? May cause condensation and water dropping...

  • Page 26: Maintenance

    Service Manual 9. Maintenance 9.1 Precautions before Performing Inspection or Repair There are high-capacity electrolytic capacitors on the outdoor mainboard. Thus, even the power is cut off, there is high voltage inside the capacitors and it needs more than 20min to reduce the voltage to safety value. Touching the electrolytic capacitor within 20min after cutting the power will cause electric shock.

  • Page 27: Flashing Led Of Indoor/Outdoor Unit And Primary Judgement

    Service Manual 9.2 Flashing LED of Indoor/Outdoor Unit and Primary Judgement 1. Requirement of malfunction display When several malfunctions happen at the same time, malfunction codes will be displayed circularly. 2. Malfunction display method (1) Hardware malfunction: it will be displayed immediately, please refer to “Malfunction status sheet”; (2) Operation status: it will be displayed immediately, please refer to “Malfunction status sheet”;...

  • Page 28: 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 Unit A freeze protection Unit A freeze protection Viewing malfunction code...
  • Page 29 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 If the above cases are existed? normally;...
  • Page 30 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: For 14/18K Start Check if power supply is normal Turn on the unit after power supply Power supply is abnormal?
  • Page 31 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 32 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 33 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 34 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 35 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 36 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 37 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 38 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 39 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...

  • Page 40: Maintenance Method For Normal Malfunction

    Service Manual 9.4 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 41 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...

  • Page 42: 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. NOTE:only grille has some differences Step rocedure 1. Before disassembly Complete axonometric drawing. 2.
  • Page 43 Service Manual Step rocedure 4. Remove top panel top panel Remove the connection screws connecting the top panel and the front panel, and then remove the top panel. 5. Remove front grille Remove the connection screws connecting the front grille and the front panel, and then loosen the clasp to remove the front grille.
  • Page 44 Service Manual Step rocedure 7. Remove right side plate right side plate Remove the screws connecting the right side plate with the chassis and the valve support. Then remove the right side plate. 8. Remove rear grill Remove the screws connecting the rear grill and left side plate, and then remove the rear grill.
  • Page 45 Service Manual Step rocedure 10. Remove axial flow blade Remove the nut on the blade and then remove the axial flow blade. axial flow blade 11. Remove motor and motor support Remove the 4 tapping screws fixing the motor and disconnect the leading wire insert of the motor.
  • Page 46 Service Manual Step rocedure 13. Remove 4-way valve assy Unsolder the welding joint connecting the 4-way valve assy with compressor suction and discharge port, the valve with the outlet pipe of condenser. Then lift the 4-way valve 4-way valve assy to remove it. assy (NOTE: Discharge the refrigerant completely before unsoldering.)
  • Page 47 Service Manual Step rocedure 16. Remove compressor compressor Remove the 3 foot nuts fixing the compressor and then remove the compressor. 17. Remove condenser assy Remove the screws fixing the condenser support and then remove the condenser support. condenser assy Remove the screws connecting the condenser support and the chassis assy, and then remove the condenser assy.

  • Page 48: 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 49: 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 50: 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 51 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 52 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...
  • Page 54 PARTS GUIDE MULTI VARIABLE SERIES MV-E14BI, MV-E18BI...
  • Page 55 MV-E14BI...
  • Page 56 Description Part Code Note Qty Price Code MODEL: MV-E14BI Outdoor unit Front Grill 22413046 Front Panel Assy 0153305105 Chassis Sub-assy 01700000013P Gas-liquid Separator 07223048 Drainage Joint 26113009 Compressor Gasket 76710247 Compressor and Fittings 00103919G Magnet Coil 4300040045 4-Way Valve Assy 030152000293 Temperature Sensor 3900007301...
  • Page 57 MV-E18BI...
  • Page 58 Description Part Code Note Qty Price Code MODEL: MV-E18BI Outdoor unit Front Grill 22413046 Front Panel Assy 0153305105 Chassis Sub-assy 01700000013P Gas-liquid Separator 07223048 Drainage Joint 26113009 Compressor Gasket 76710247 Compressor and Fittings 00103919G Magnet Coil 4300040045 4-Way Valve Assy 030152000293 Temperature Sensor 3900007301...
  • Page 60 SINCLAIR CORPORATION Ltd. 1-4 Argyll St. London W1F 7LD Great Britain www.sinclair-world.com This product was manufactured in China (Made in China). REPRESENTATIVE SINCLAIR EUROPE spol. s r.o. Purkynova 45 612 00 Brno Czech Republic TECHNICAL SUPPORT NEPA spol. s r.o. Purkynova 45...

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Mv-e18biMv-e14bi

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