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Summary of Contents for Sinclair AST-24AI
- Page 1 SERVICE MANUAL TOWER SERIES AST-24AI...
- 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.
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Page 3: Table Of Contents
Service Manual Table of Contents Part Ⅰ : Technical Information ................1 1. Summary ......................... 1 2. Specifications ......................2 2.1 Specification Sheet ......................2 2.2 Operation Characteristic Curve ................... 4 2.3 Capacity Curve in Different Outdoor Temperature .............. 4 2.4 Cooling Data Sheet in Rated Frequency ................ - Page 4 Service Manual 9.Troubleshooting ...................... 33 9.1 Judgement by Flashing LED of Indoor ................33 9.2 How to Check Simply the Main Part of Indoor ..............34 9.3 Judgement by Flashing LED of Outdoor ................39 9.4 Maintenance Method for Normal Malfunction ..............45 10.
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Page 5: Part Ⅰ : Technical Information
Service Manual Part Ⅰ : Technical Information 1. Summary Indoor Unit: Outdoor Unit: Remote Controller: YAP1F4(WiFi) Technical Information... -
Page 7: Specifications
Service Manual 2. Specifications 2.1 Specification Sheet Parameter Unit Value Model AST-24AI Product Code CH156000800 Rated Voltage 220-240 Power Rated Frequency 50.0 Supply Phases Power Supply Mode Outdoor Cooling Capacity 7200 Heating Capacity 7500 Cooling Power Input 2250 Heating Power Input... - Page 8 Service Manual Model of Outdoor Unit AST-24AI Product Code CH156W00800 Compressor Manufacturer/Trademark ZHUHAI LANDA COMPRESSOR CO,LTD. Compressor Model QXFS-D25zX090H Compressor Oil R68EP Compressor Type Rotary L.R.A. Compressor RLA 11.0 Compressor Power Input 2420.0 "HPC115/95U1 Overload Protector KSD115℃ " Throttling Method...
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Page 9: Operation Characteristic Curve
Service Manual 2.2 Operation Characteristic Curve Cooling Heating 220V Conditions 220V Indoor:DB27°C/WB19°C Outdoor:DB35°C/WB24°C Indoor air flow:Super High Pipe length:5m Conditions Indoor:DB20°C/WB15°C Outdoor:DB7°C/WB6°C Indoor air flow:Super High Pipe length:5m 10 20 30 40 50 60 70 80 90 100 Compressor speed (rps) Compressor speed (rps) 2.3 Capacity Variation Ratio According to Temperature 2.3 Capacity Curve in Different Outdoor Temperature... -
Page 10: Cooling Data Sheet In Rated Frequency
P (MPa) T1 (°C) T2 (°C) in:8~11 in:65~75 27/19 35/24 0.9 to 1.1 Super High High AST-24AI out:11~14 out:37~43 Heating: Pressure of gas pipe Inlet and outlet pipe Rated heating condition(°C) Compressor connecting indoor and temperature of heat Fan speed of... -
Page 11: Outline Dimension Diagram
Service Manual 3. Outline Dimension Diagram 3.1 Indoor Unit Unit:mm Model 1770 AST-24AI Technical Information... -
Page 12: Outdoor Unit
Service Manual 3.2 Outdoor Unit Unit:mm Technical Information... -
Page 13: Refrigerant System Diagram
Valve Capillary Strainer Service Manual COOLING 4. Refrigerant System Diagram Outdoor unit Indoor unit Gas pipe side Valve 4-Way valve Di s charge Heat Suction Accumlator exchanger Compressor (evaporator) Heat exchanger Liquid pipe (condenser) side Valve Strainer Electronic Strainer expansion COOLING HEATING Connection pipe specification:... -
Page 14: Electrical Part
Service Manual 5. Electrical Part 5.1 Wiring Diagram ● Instruction Symbol Symbol Color Symbol Symbol Color Symbol Name Yellow Brown COMP Compressor Blue Grounding wire YEGN Yellow/Green Black Indoor Unit ● 600007001200 Technical Information... - Page 15 Service Manual ● Outdoor Unit 60000700094301 These wiring diagrams are subject to change without notice; please refer to the one supplied with the unit. Technical Information...
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Page 16: Pcb Printed Diagram
Service Manual 5.2 PCB Printed Diagram Indoor unit ● Top view Copper pin terminal of communication wire Needle stand of display board Needle stand of up&right swing Needle stand of left&right swing Door switch terminal Electrostaitc dedusting terminal Needle stand of temperature sensor Inspection needle stand for up&down position of sliding... - Page 17 Service Manual Outdoor unit ● Top view Terminal of compressor wire Terminal of electronic expansion valve Terminal of sensor Terminal of compressor overload protection Terminal of high pressure protection Terminal of outdoor fan Terminal of compressor electric heating Terminal of 4-way valve Power supply live wire Communication wire with indoor unit...
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Page 18: Function And Control
Service Manual 6. Function and Control 6.1 Function Buttons of Air Conditioner Button’s Name and Function ON/OFF button MODE button FAN button FUNCTION button ▼/▲ button ON/OFF button MODE FUNC. Introduction for icons on display screen of air conditioner Ambient temperature Timer Operation or set temperature... - Page 19 Service Manual Button’s introduction ▼/▲ button After each pressing of "▲" or "▼" button, set temperature will increase or decrease . Temperature adjustment range is . This button is invalid under auto mode. Timer setting can be set in 1h increment among 0~24h. When it is adjusted to auxiliary heating function setting through Function button,press this button to turn on or turn off auxiliary heating.
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Page 20: Remote Control Operations
Service Manual 6.2 Remote Control Operations Buttons on remote controller ON/OFF button SAVE button FAN button MODE button ▲/ button HEAT button COOL button button button SLEEP button WiFi button X-FAN/E-HEATER button QUIET button LIGHT button TIMER button Introduction for icons on display screen Set fan speed fan speed. - Page 21 Service Manual ON/OFF button Press this button can turn on or turn off the air conditioner. After turning on the air conditioner, indoor unit will give out a sound. SAVE button Under cooling mode, press this button to start up or turn off energy-saving function.When energy-saving function is started up, "SE"...
- Page 22 Service Manual button Under simple swing mode, pres this button can turn on (" " icon is displayed) or turn off (" " icon is not displayed) the left&right swing function. When the unit is turned off by remote controller, press "▲" button and " "...
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Page 23: Child Lock Function
Service Manual QUIET button Press this button can turn on or turn off QUIET function. This function is not available for this unit. LIGHT button Press this button to turn off display light on indoor unit. Press this button again to turn on display light. TIMER button ▲... -
Page 24: Description Of Each Control Operation
Service Manual 6.3 Description of Each Control Operation 1.Basic Functions 1.1 Cooling Mode When Tamb.≥Tpreset+1 , the unit will run in cooling mode. Meanwhile, compressor and outdoor fan will run. Indoor fan will run at setting fan speed; When Tamb.≤Tpreset-1 , the unit will stop running in cooling mode. Compressor and outdoor fan will stop running, while indoor fan is still running at setting fan speed;... - Page 25 Service Manual 3.3 Sleep If the controller is in cooling or dry mode, after the sleep function is started, Tpreset will be increased but it won’t increase over 3 . Then the unit will run at the increased temperature. If the controller is in heating mode, after the sleep function is started, Tpreset will be decreased and it won’t decrease over 3 .
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Page 26: Ewpe Smart App Operation Manual
Service Manual 6.4 Ewpe Smart App Operation Manual Control Flow Chart Internet Cloud intelligent Home Wi-Fi Cellular/ home Other Wi-FI appliances Home wireless router Home Wi-Fi Operating Systems Requirement for User's smart phone: iOS system Android system Support iOS7.0 and Support Android 4.4 and above version above version... -
Page 27: Part Ⅱ : Installation And Maintenance
Service Manual Part Ⅱ : Installation and Maintenance 7. Notes for Installation and Maintenance 10. If the power cord or connection wire is not long enough, Safety Precautions: please get the specialized power cord or connection wire from the manufacture or distributor. Prohibit prolong the wire by Important! yourself. - Page 28 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 29 Service Manual Main Tools for Installation and Maintenance 1. 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. Vacuum pump 9.
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Page 30: Installation
Service Manual 8. Installation 8.1 Installation Dimension Diagram Away from wall (30cm at least for piping side) Away from obstacles Away from wall (30cm at least for piping side) Away from back side Installation and Maintenance... -
Page 31: Installation Procedures
Service 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 the support of outdoor unit Drill wall holes (select it according to the actual situation) Connect pipes of indoor Fix outdoor unit unit and drainage pipe... -
Page 32: Installation Parts-Checking
Capacity of air switch Model 5. Select a location where air inlet and outlet won't be blocked. AST-24AI 6. Select a location with least affection of outdoor air. 7. Select a location with firm and flat floor. 8. Retain sufficient space for maintenance and installation. - Page 33 Service Manual Note: 1.Pay attention to dust prevention and take relevant Refer to the following table for wrench moment of force: safety measures when opening the hole. Hex nut diameter(mm) Tightening torque(N m) 2.The plastic expansion particles are not provided and Φ6(1/4") 15~20 should be bought locally.
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Page 34: Installation Of Outdoor Unit
Service Manual 3. Adjust the position of upper and lower adjusting baffle; Step Eight: place the indoor unit 1.Put the bound pipes in the wall pipe and then make them clamp the connection pipe and drain pipe as firm as possible. - Page 35 Service Manual Step two: install drain joint (only for cooling and heating unit) Handle 1. Connect the outdoor drain joint into the hole on the chassis, as shown in the picture below. N(1) 2 2. Connect the drain hose into the drain vent.(As show in yellow- blue black brown brown...
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Page 36: Vacuum Pumping And Leak Detection
Service Manual 8.7 Vacuum Pumping and Leak Detection Items to be checked Possible malfunction Has the unit been The unit may drop, shake or Use Vacuum Pump installed firmly? emit noise. 1. Remove the valve caps on the liquid valve and gas valve Have you done the It may cause insufficient cooling refrigerant leakage test? -
Page 37: Troubleshooting
Service Manual 9.Troubleshooting 9.1 Judgement by Flashing LED of Indoor Malfunction Error A/C Status Possible Causes Name Code 1. The main board and the display panel are not connected well. 2. The OVC terminal on main board is not connected well with the high pressure switch on the complete unit. -
Page 38: How To Check Simply The Main Part Of Indoor
Service Manual 9.2 How to Check Simply the Main Part of Indoor (1) High pressure protection (E1) Start Are the display panel and main board Connect the display panel with the main board well Malfunction is eliminated. connected tightly? Are the OVC terminal on the main board connected Connect the OVC terminal on the main board with Malfunction is eliminated. - Page 39 Service Manual (2) Freeze protection(E2) Start Clean the filter, check Is the problem Poor air return in indoor unit space at the top of solved? indoor unit Check whether jumper Is the problem The fan speed is abnormal cap and motor is solved? normal Is the problem...
- Page 40 Service Manual (3) Low pressure protection of compressor (E3) “E3" is displayed on the unit. Re-insert it tightly Is the terminal of low pressure switch to ensure reliable inserted well? contact. Is the malfunction eliminated? Is the system pressure higher than the acting Add refrigerant.
- Page 41 Service Manual (4) High discharge temperature protection of compressor (E4) Start Check the system; Problem is Abnormal system (blockage) eliminate the solved blockage Motor speed of Check wiring and Problem is outdoor unit is abnoral fan capacitor, solved (under cooling mode) replace motor Check the unit to Abnormal air in for...
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Page 42: Installation And Maintenance
Service Manual (5) Overcurrent protection (E5) Start Normal fluctuation is within 10% of the rated voltage on the Is the supply voltage unstable with big fluctuation? Malfunction is eliminated. nameplate Is the supply voltage too low with overload? Adjust the supply voltage to maintain it within normal range Malfunction is eliminated. -
Page 43: Judgement By Flashing Led Of Outdoor
Service Manual 9.3 Judgement by Flashing LED of Outdoor Name of malfunction Outdoor Display Error Code System high pressure protection Anti-freezing protection System low pressure protection Compressor exhaust high temperature protection Communication failure between indoor unit and outdoor unit Outdoor tube sensor open or short circuit Outdoor ambient sensor open or short circuit Exhaust sensor open or short circuit Outdoor DC fan motor malfunction... - Page 44 Service Manual 3. E3: Low pressure protection Malfunction description: The pressure of ODU low pressure side is too low Main check points: a. Is the system pressure is normal; b. Is the pressure switch is normal; c. If above two issues are normal, the mainboard circuit is with malfunction, please replace mainboard. Pressure switch terminal of low Pressure 4.
- Page 45 Service Manual 6. F2: ODU tube temp. sensor open/short circuit Malfunction description: The ODU tube temp. sensor temperature value is too high or too low that out of the normal range. Main check points: a. Pull off the ODU tube temp. sensor, check if the temp. sensor resistance value match with present temperature; b.
- Page 46 Service Manual 10. P5: Compressor phase current overcurrent protection Malfunction description: Compressor operation current is over than the setting protection value. Main check points: a. Check if the indoor and outdoor ambient temperature is over than normal cooling, heating temperature range; b.
- Page 47 Service Manual 13. HC: PFC protection Main check points: a. Check if the unit voltage input is normal; b. Check if the inductance wire is well connected; c. If the above two issues are normal, please replace the ODU mainboard. PFC inductance connection terminal 14.
- Page 48 Service Manual 20. PL: ODU DC bus bar voltage too low Malfunction description: When it is detected the voltage of DC bus bar on electrolytic capacitor is less than 200V. Main check points: a. Check if the input voltage is too low that out of normal power supply voltage range. ODU DC bus bar voltage test point is showed as following picture, please measure the voltage of DCLINE-P and DCLINE-N with multimeter DC grade.
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Page 49: 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 50 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 51: Removal Procedure
Service Manual 10. Removal Procedure Caution: discharge the refrigerant completely before removal. 10.1 Removal Procedure of Indoor Unit Step Procedure 1.Outside view of indoor unit 2.Remove the big front panel sub-assy Open the screw cover, use screwdriver to remove the screws at both side of big front panel sub-assy air-in panel, push the big front panel upwards and then separate the connector... - Page 52 Service Manual Step Procedure 3.Remove display box sub-assy screw Take out the connection wire of display from the wire groove, remove the fixing screws of display box sub-assy, and then remove the display box sub-assy. display box sub-assy big front panel sub-assy 4.
- Page 53 Service Manual Step Procedure 6.Remove electric box and wire-passing groove sub-assy Remove the four screws fixing the electric box cover and then remove the electric box cover; disconnect the wiring terminal of each electronic components and then remove related electronic components according to your requirements;...
- Page 54 Service Manual Step Procedure 8.Remove upper cover, horizontal louver, swing board swing board upper cover a.Remove 2 screws at the upper part of the upper cover and two screws at the screw back side of the air-outlet panel. horizontal louver b.After removing the air-guiding connecting robe, and then pull the horizontal louver air swing...
- Page 55 Service Manual Step Procedure guide grille 11.Remove electric heating part Remove 4 screws used for fixing the screw guide grille and then remove the guide grille. Remove 4 screws fixing the electric heating part, and then remove the electric screw heating parts.
- Page 56 Service Manual Step Procedure 13.Remove evaporator screw Remove 4 screws used for fixing the top connection board and lower connection board of evaporator and 2 screws used for fixing the side plate, pull left and right side plates outwards slightly and take screw out evaporator, baffle board and water tray.
- Page 57 Service Manual Step Procedure 15.Remove chassis Remove 9 screws, pull it downwards and then remove the chassis. chassis 16.Remove left and right side plates sub-assy Remove screws on both plates, pull it to both sides respectively and then remove left and right side plates sub-assy. right side plate sub-assy left side plate...
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Page 58: Removal Procedure Of Outdoor Unit
Service Manual 10.2 Removal Procedure of Outdoor Unit Warning Be sure to wait for a minimum of 10 minutes after turning off all power supplies before disassembly. Steps Procedure 1. Remove big handle,valve cover and top cover Remove the screw connecting the big handle and right side plate, and then remove the big handle. - Page 59 Service Manual Steps Procedure Remove the screws connecting the outer case with motor support, isolation plate and chassis; lift the outer case upwards; loosen the clasps of outer case with right side plate and left side plate, and then remove the outer case. outer case 3.
- Page 60 Service Manual Steps Procedure 4. Remove axial flow blade Remove the nut fixing axial flow blade and then remove the blade. axial flow fan motor support Remove the 6 screws fixing the motor and then remove the motor. Remove the 2 screws connecting the motor support and chassis, and then loosen the stopper to remove the motor support.
- Page 61 Service Manual Steps Procedure 6. Remove the soundproof sponge Tear off the sticking stripe and then remove the soundproof sponge. soundproof sponge 7. Remove isolation plate Remove the 2 screws connecting the isolation plate and condenser side plate; remove the 3 screws connecting the isolation plate and chassis, and then remove the isolation plate.
- Page 62 Service Manual Service Manual Steps Procedure 9. Remove compressor compressor Remove the 3 foot nuts fixing compressor and then lift the compressor upwards to remove the compressor and damping cushion. Note: Keep the ports of discharge pipe and suction pipe from foreign objects.
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Page 63: 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 64: 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 65: 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 66 Service Manual Resistance Table of Tube Temperature Sensors for Outdoor and Indoor(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 4.289...
- Page 67 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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Page 68: Technical Support
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...