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SPLIT TYPE AIR CONDITIONER

Service Manual

AA-2121

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Summary of Contents for AA-2121

Page 1: ...1 SPLIT TYPE AIR CONDITIONER Service Manual AA 2121 ...

Page 2: ...f protecting point 16 4 Exploded view 17 4 1 Exploded view for indoor unit 17 4 2 Exploded view for outdoor unit 19 5 Refrigerant Flow Diagram 20 6 Circuit Diagram 21 6 1 Electrical wiring diagram for indoor unit 21 6 2 Electrical wiring diagram for outdoor unit 21 7 Troubleshooting 22 7 1 Check before troubleshooting 22 7 2 The air conditioner does not work 23 7 3 Some parts of the air conditione...

Page 3: ... 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 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: ...ube Pipeline connection manner Flare Max pipeline length m 15 Narrow tube mm 6 35 1 4 Refrigerant tubing diameter Wide tube mm 15 88 5 8 Data subject to change without notice 2 2 Specifications of main parts 2 2 1 Indoor unit Controller Controls Temperature control Microprocessor I C thermostat Control unit Infrared remote control transmitter Fuse 250V T3 15A Fan Fan motor Fan type Cross flow fan ...

Page 5: ...o Fuse Compressor model SHW73TC4 E Safety devices Type Internal Operating capacitor μF VAC 60 450 Fan Fan motor Fan type Propeller fan Fan motor model YDK53 6Q 1 Heat exchanger Fin Aluminum fin tube Copper Data subject to change without notice ...

Page 6: ...Thermal resistor Coiled pipe KTM 41 C9 Resistance temperature 25 KΩ 10 Power supply length m cross section mm2 2 5 2 5 Rated value 20A 250VAC Power relay JZC 32F 012 1H1 JZC 32F 012 1H1 Coil rated voltage Current coil resistance 20 12V 300Ω 10 12V 300Ω 10 Data subject to change without notice ...

Page 7: ...nction is only effective when the air conditioner is running The indoor unit will display TIMING when this function is effective The unit will be turned off at the set time and TIMING signal will disappear When the user turn off the unit ahead of the set time by remote controller or Emergency button the Timing off function will be canceled Note The set time for Timing off is 1 8 hours 3 2 3 Sleep ...

Page 8: ...he unit will judge before the starting of compressor When Trc F the indoor fan motor will run at low level and the louver is in position 5 When Trc 25 the indoor fan motor will stop The unit will enter freeze prevention operation after the compressor starts 3 2 6 Operation for dryness enzyme prevention When the unit is turned off in cooling mode the indoor unit will continue run in low fan speed f...

Page 9: ... runs When Tr Ts 1 compressor stops The control circuit will stop compressor only after it has run at least 5 minutes The compressor can be restarted 3 minutes later the turn off Fan speed control Auto When Tr Ts 2 high speed When Ts Tr Ts 2 medium speed When Tr T low speed Manual Users can select the fan speed of high medium or low level as needed when the air conditioner is in the turn on status...

Page 10: ...ow level Manual Users can select the fan speed of high medium or low level as needed Auto When Tr Ts 2 high speed When Tr Ts 2 medium speed Louver adjustment Manual vertical direction Set the blades position as needed Position 1 5 in figure 1 Auto vertical direction The range of sweeping is in position 1 4 fan speed is 5 degree second Compressor control The control circuit will stop compressor onl...

Page 11: ...ode When the louver blades are at the position 1 2 5 as shown in Fig 1 for at least 15 minutes the blades will come back to 3 position automatically and now the position for louver blades can be adjusted Note There would be no dew prevention when at high airflow level 3 4 4 Freeze prevention To prevent indoor heat exchanger freezing in cool and dry operation When Trc 3 the unit will enter freeze p...

Page 12: ...n louver blades are in position 3 and return to the original position 3 4 7 Defrosting 3 4 7 1 Defrost entry conditions Defrost condition has three branches which has something in common A Compressor is running B Compressor has been running for more than 10 minutes Difference between the three branches A The first branch a When the temperature of indoor pipe begins to descend the sum of descending...

Page 13: ...e 11 displays room temperature code 12 displays indoor pipe temperature code 13 displays outdoor pipe temperature B Code 14 displays abnormal information E0 displays normal operation P2 displays heating overload P3 displays freeze prevention protection F1 The circuit of room temperature sensor is damaged or abnormal F2 The circuit of indoor pipe temperature sensor is damaged or abnormal C The circ...

Page 14: ...sing indoor fan will continue running for 30 seconds when switching off The other things are the same to the condition when switching off normally 3 5 4 Display function The central display screen does not display symbols if air conditioner is in off status but Timer indicator lights when in Timer mode In the checking and setting conditions the screen will also display the corresponding state of t...

Page 15: ...ction for AIR REFRESH button Press AIR REFRESH button and hold on and finish the test condition after 5 seconds When entering this mode the original value is 00 for each entry The second function is only effective for temperature control button on off button and air refresh button Other buttons are not effective for the second function The second function for AUH button Press AUH button and hold o...

Page 16: ...6 77 88 99 00 1s circularly After receiving the signal from the remote controller the unit will operate by the signal During the courts of demonstration all signals of outdoor unit are ineffective 3 6 Temperature table of protecting point ＡＢＣＤＥＦＧ H I 52 55 65 50 47 32 60 55 65 ...

Page 17: ...17 4 Exploded view 4 1 Exploded view for indoor unit TYPE A TYPE B ...

Page 18: ...electric control cover assembly 1 3 evaporator assembly 1 10 wall plate 1 4 air guiding frame assembly 1 11 fixed plate 1 401 Air guiding frame 1 12 clip fixed plate 1 402 Air guiding 1 13 rear frame assembly 1 403 Air guiding 1 14 tube plate 1 404 Flap 1 15 Bearing assembly 1 405 step motor 1 16 fan assembly 1 406 Drain Pipe 1 17 motor 1 5 indoor electric control assembly 1 18 motor cover 501 ele...

Page 19: ...itor clip 27 fan 6 front plate assembly 16 bolt assembly 26 fan motor 5 handle assembly 15 special nut assembly 25 left lateral plate assembly 4 cover plate assembly 14 copper tube assembly 24 valve installation plate 3 motor bracket 13 capillary assembly 23 chassis plate assembly 2 outdoor electric control assembly 12 sound insulation assembly 22 membrane capacitor 1 condenser assembly 11 cut off...

Page 20: ...igerant pipeline To prevent heat loss and condensed water from 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 ...

Page 21: ...hock hazard be sure to disconnect power before checking servicing and or cleaning any electrical parts 6 2 Electrical wiring diagram for outdoor unit To avoid electrical shock hazard be sure to disconnect power before checking servicing and or cleaning any electrical parts Warning Warning ...

Page 22: ...nit wires are connected correctly 7 1 3 Check power supply To check whether the power supply is in the specified range 220 240V 7 1 4 Check connector and lead wire of indoor and outdoor units To check whether the insulating cover of the lead wire is damaged To check whether the lead wire and the connector are connected well To check wires High voltage will result in electric shock or death Always ...

Page 23: ...erminal block of outdoor unit And measure insulation resistance of outdoor unit Poor insulation performance No Measure the insulation resistance of the electric parts of outdoor unit Disconnect unit wires from terminal block of indoor unit Unplug the unit and measure the insulation resistance of indoor unit No Measure the insulation resistance of the electric parts of outdoor unit Poor insulation ...

Page 24: ...minal No 1 and No 2 on the terminal block 220 240V PCB Ass y of indoor unit is defective Outdoor unit is defective Ok No voltage indication Indoor PCB Ass y is defective 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 fan motor Ok Ok Not rotate Measure the resist...

Page 25: ...ot rotate Check compressor capacitor Measure the resistance of compressor coil Measure the resistance of power relay coil Measure if power 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 Remote controller may be defective Measure the resistance of 4 way reversing valve coil Cooling Heatin...

Page 26: ... blocked Compressor is in error Service valve is not open completely Air circulating capacity is not enough The air filter is blocked 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 reversing valve is d...

Page 27: ...ce by placing a probe on each terminal screw on the terminal plate Fig 2 Note that the ground line terminal should be skipped for the check 8 1 3 Outdoor unit Clamp a metallic part of the unit with the lead clip of the insulation resistance tester and measure the resistance by placing a probe on each terminal screw where power supply lines are connected on the terminal plate Fig 2 8 1 4 Measuremen...

Page 28: ...move 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 maximum value The capacitor is good if the pointer bounces to a great extent and then gradually returns to its original position The range of deflection and deflection time differ a...

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