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Service Manual

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SPLIT TYPE CEILING CASSETTE AIR CONDITIONER

Service Manual

AA-2118

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Summary of Contents for AA-2118

Page 1: ...Service Manual 1 SPLIT TYPE CEILING CASSETTE AIR CONDITIONER Service Manual AA 2118 ...

Page 2: ...s 10 Temperature Table of Prevent Point 12 4 Dimensional Data 13 5 Performance Charts 15 6 Refrigerant Flow Diagram 16 7 Circuit Diagram Electrical Wiring Diagram for Indoor Unit 18 Electrical Wiring Diagram for Outdoor Unit 19 8 Troubleshooting Check before Troubleshooting 20 Air Conditioner Does Not Work 20 Some Parts of Air Conditioner Do Not Work 22 Air Conditioner Operates But Abnormalities a...

Page 3: ...32 DB 27 WB 43 DB Cooling Min 21 DB 15 WB 21 DB 1 2 Operating Conditions Rated Operating Conditions Indoor Temperature Outdoor Temperature Cooling 27 DB 19 WB 35 DB 24 WB Heating 20 7 DB 6 WB Tubing Length m 4 0 Max Operating Value Indoor Temperature Outdoor Temperature Cooling 32 DB 23 WB 43 DB DB Dry bulb temperature WB Wet bulb temperature ...

Page 4: ...imer ON OFF 24 hours Fan speed Indoor Outdoor High Medium Low Auto High Horizontal Manual Airflow direction Vertical Auto Air filter Anti mold washable Compressor Rotary type Hermetic Refrigerant g R22 600 Refrigerant control Capillary tube Indoor dB A 40 Noise Outdoor dB A 52 Pipeline connection manner Flare Max pipeline length m 9 0 Narrow tube mm 6 35 1 4 Refrigerant tubing diameter in Wide tub...

Page 5: ...otor model Welling RPG20E 2 Pole Rotation of motor rpm 220V High speed 4 1250 Rated power output W 16 Coil resistance Ambient temp 20 Ω red purple 290 15 purple white 403 15 μF 1 0 Fan Operating capacitor VAC 450 Louver motor Type Step motor Model ZTC1 01 Rated voltage V 12VDC 10 Coil resistance Ambient temperature 25 Ω 80Ω 10 Heat exchanger Fin Aluminum fin Copper tube Row 1 Row pitch mm 1 4 Face...

Page 6: ...ighly C R 3 53 C S 4 02 Operating capacitor μF VAC Highly 25 450 Fan Fan motor Type Propeller fan Amount Diameter mm 1 Ф400 Fan motor model amount Welling YDK19 6V 2 Pole Rotation of motor 220V High speed rpm 6 860 Rated power output W 19 Coil resistance Ambient temp 20 Ω white gray 254 15 brown white 150 15 Safety devices Open 130 8 Close 82 15 μF 2 0 Operating capacitor VAC 450 Heat exchanger Fi...

Page 7: ...ure KTEC 41 C12 Thermal resistor Coiled pipe KTM 41 C9 Resistance temperature 25 K Ω 10 Power supply length m cross section mm2 2 5 AWG16 Rated value 15A 250VAC Power relay JQX 102F 012 P Coil rated voltage Current coil resistance 20 12V 10 20A 160Ω Outdoor unit Data subject to change without notice ...

Page 8: ...ure compensation in heating mode There is no temperature compensation in cooling and dehumidification mode 3 1 3 Sleep mode For better comfort in sleeping and energy saving Temperature will be adjusted automatically when the sleep mode is set The set temperature will increase 1 after running 1 2 hour in cooling and dehumidification mode and 1 after another 1 2 hour Temperature will decrease 2 afte...

Page 9: ...sion 1 Characters on control 4 way reversing valve closes When Tr Ts 2 the running mode is the same to the cooling operation When Ts 1 Tr Ts 2 compressor and external fan motor run continuously And internal fan motor runs between low wind for 10 seconds and breeze for 20 seconds continuously When 15 Tr Ts 1 compressor and external fan motor work for 3 minutes then stop for 9minutes When compressor...

Page 10: ...r the turn off 3 3 Protect functions 3 3 1 Delay starting protection for the compressor Compress will restart working 3 minutes 5 minutes in heating later the turn off of compressor or power off to keep the pressure balance of the cooling system 3 3 2 Cooling air flow protection In heating operation when Trc F and compressor stops or the running time of compressor is not more than 5 minutes Air co...

Page 11: ... Compressor and outdoor fan motor will stop working after entering into defrost running 55 seconds later 4 way reversing valve will close Another 5 seconds compressor starts running When the time of the compressor running is for more than 10 minutes or outdoor coiled temperature is above 20 Compressor stops 55 seconds later 4 way reversing valve will open Another 5 seconds later compressor and out...

Page 12: ...ating 1 The starting conditions of auxiliary electric heating a In heating or Auto mode b Compressor runs for more than 1 minute c Tr 14 d Ts Tr 6 e Indoor fan motor is running 2 Auxiliary electric heating will be closed under the one of the following conditions a Tr 18 b Ts Tr 2 c Trc A 2 d Indoor fan motor stops working e The unit enters into defrosting operation Note The electric heating will b...

Page 13: ...Service Manual 13 4 Dimensional data 4 1 Unit 4 1 1 Indoor unit 4 1 2 Outdoor unit The above figures are only schematic and they may be slightly different from the actual appliances you bought Note ...

Page 14: ... ABSORPTION BAR BRACKET ASSEMBLY 11 BEARING ASSEMBLY 2 AIR FILTER 12 INDOOR FAN 3 WIND ABSORPTION BAR 13 LEFT FILTER BRACKET ASSEMBLY 4 AIR GUIDING BOARD 14 COVER ASSEMBLY 5 FAN MOTOR UPPER COVER ASSEMBLY 15 TRANSFORMER 6 RIGHT FILTER BRACKT ASSEMBLY 16 INDOOR ELETRIC ...

Page 15: ...l 15 CONTROL ASSEMBLY 7 INDOOR FAN MOTOR 17 Air outlet guid 8 EVAPORATOR ASSEMBLY 18 DRAIN CANAL ASSEMBLY 9 Air supply shelf Ass y 19 DRAIN CANAL INSTALL BOARD 10 Air shutter Ass y 20 Exploded view for outdoor unit ...

Page 16: ...air conditioner when the outdoor ambient temperature reaches an abnormally high level while in heating mode Points of rating condition Note The speed of the indoor unit is high 6 Refrigerant Flow Diagram Outdoor unit Indoor unit Compressor Service valve Service valve Pipe Pipe Joint Joint Capillary tube Strainer Indoor heat exchanger Outdoor heat exchanger ...

Page 17: ...dropping on the floor the wide and narrow tube of air conditioner should be wrapped with thermal insulating materials For using capillary tube and the tubes are in low temperature the thickness of thermal insulating materials shall be more than 8mm Model AA 2118 Narrow tube Ф6 35mm 1 4 Wide tube Ф9 52mm 3 8 ...

Page 18: ...e Manual 18 7 Circuit Diagram 7 1 Electrical wiring diagram for indoor unit To avoid electrical shock hazard be sure to disconnect power before checking servicing and or cleaning any electrical parts Warning ...

Page 19: ...ing any electrical parts Terminal Board M C Blue White Gray S Fan Motor Brown M Brown Blue Blue Blue Red R White M S C E Compressor YEL GRE Red To Indoor Unit Run Capacitor C1 Run Capacitor C2 Overload Protector compressor is used diagram if internal protector Note No overload protector in the 1 4 5 2 3 N YEL GRE YEL GRE Outdoor Wiring Diagram JUZ8 817 136 Warning ...

Page 20: ...e protector is open or fuse is burnt A Setting leakage protector to ON it opens immediately can not reset There is possibility of ground fault Check insulation resistance The insulation resistance shall be more than 2MΩ B Leakage protector is OFF C The fuse is open in several minutes after turning air conditioner on Disconnect unit wires from terminal block of outdoor unit And measure insulation r...

Page 21: ...ce transformer No No No Yes Yes Check power supply Check if something residue cover on transmitting part of the remote controller 1 Power failure 2 Check the breaker Clean it Check if infrared receiver on indoor unit is dirt Clean it Check fuse on indoor PCB Ass y Check the resistance of fan motor coil of indoor unit Parts of indoor PCB Ass y or switches are defective Measure the resistance of pow...

Page 22: ... is too low for heating operation Adjust the set temperature Measure the voltage between terminal No 1 and No 2 on the terminal block 220V 10 PCB Ass y of indoor unit is defective Outdoor unit is defective Yes Ok No voltage indication Indoor PCB Ass y is defective Measure the resistance of the louver motor coil Check the connector Check the fan rotation Check if foreign matter is in the fan cover ...

Page 23: ...r supply voltage is too low Overload protector activates The temperature of compressor is too high Refrigerant is not enough Fill it Rotor may be blocked Yes No Check the fan rotation Check if foreign matter is in the fan cover Check if fan motor is broken or foreign matter in bearing Measure the resistance of motor coil Check the capacitor of the fan motor Ok Ok Not rotate ...

Page 24: ...e Remote controller may be detective Measure the coil resistance of 4 way reversing valve Check the voltage between terminal No 5 and N0 2 on the terminal block AC220 Ok 4 way reversing valve is defective PCB Ass y of indoor unit is in error NO voltage Measure the voltage between terminal No 5 and No 2 on the terminal block ov Cooling Heating Cooling Heating ...

Page 25: ... in error Replace it Service valve is not open completely Open it completely Air circulating capacity is not enough The air filter is blocked Clean it 4 way reversing valve fails Replace it Fan running speed is at low Change it to high or medium Connection between indoor and outdoor units is in poor thermal insulated Wide and narrow tubes are thermal insulated separately Cooling air flow 4 way rev...

Page 26: ... Measure insulation resistance The insulation is in good condition if the resistance exceeds 2 M Ω 9 1 1 Power supply wires Clamp the ground pins of the power plug with the lead clip of the insulation resistance tester and measure the resistance by placing a probe on either of the power wires Fig 1 Then measure the resistance between the ground wire and the other power wire Fig 1 9 1 2 Indoor unit...

Page 27: ...B ass y from the electrical component box Then pull out the fuse from the PCB ass y Fig 5 Check for continuity using a multimeter as shown in Fig 6 9 3 Checking motor capacitor Remove the lead wires from the capacitor terminals and then place a probe on the capacitor terminals as shown in Fig 7 Observe the deflection of the pointer setting the resistance measuring range of the multimeter to the ma...

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