SERVICE MANUAL
Contents
1. 1 2 rii Relay Rating 250 20 P 7 4 Printed Wirng Board Material Paper Base Phenolic Resin UND s Transformer Rating 4220240 Fan motor 220 240VAC 50Hz 41W 4 Pole Type C Protector re off 135 Power Supply Cord 1 OUTDOOR UNIT AU MP20 A Compressor Rating AC220V 50Hz 1730W Type PH31VNET 5 Protector Rating Type INTERNAL Fan motor i 220 240VAC 50Hz 71W 6 Pole MLAOO2 2 2 MICRO COMPUTER CONTROL SYSTEM 1 Electronic Control Diagram Indoor unit AH MP20 a m TOON BA NVA NV3 Cd 1531 5531 d334 EEU ICON SCONE ANOJ INV3 Sn19 1000 Adidf Mdf 3MS LOH jeje li Jefe di ac dq oso TR zx RS B dIN3 L 3dld aN i L LHL E Goe oK W 9452555 izin 0462 16 e a bd g mE O89 A0 gt 24 MV CC OOO MV OE d EEE CEE CE gt CX gt 00 Va 15840 ws Bar RIS eSLleSls III eSLlesls Ie iw Aw 9C TIT mo EM na HOLIMS LOLMS Q E Q ONINV312 9 5 Mee GEN 1VISOIS3HL EMM TWNUSLNI l ZOLNOS i voe ZOLNO T Du LINN2. BOEROA NOU PNYINOLLD 135 T00 HO CE EE E CN GT AO OPTED 50031 01 031 601031 N3349 N3349 N33H9 23230 32130 edu HOWE 0333 01 2922 30 92r91 99 2 20 4 201031 3ONVHO 2 1 PLASMA CLUSTER Plasma cluster ion mode SSR2 ON Relay Cluster unit inside OFF Minus ion mode SSR2 Relay Cluster unit inside ON 1 Cluster generator checking STEP 1 Time LED Yellow Judgement Check circuit NC O T O 10 3 DIAGNOSIS PROCEDURE When indoor fan motor is out of order or compressor lock occurs indoor fan motor outdoor fan motor and louver are all stopped and the operation LED red turns on or off synchronously with the timimg of the timer LED When the thermistor for room temperature or pipe temperature is open or short state the operation LED turns on or off synchrnoously with the timing of the timer LED by pushing continously for more than 5 seconds AUX button during suspension of operation 1sec 1sec Timer LED Indoor Operation fan motor LED Comp lock Operation LED Thermistor Operation short state LED Thermistor Operation open state LED Timing chart of Timer LED and Operation LED of DIAGNOSIS PROCEDURE When Ol button the remote controller or AUX button in the unit is pushed the unit is free from DIAGNOSIS
3. ff HOOALNO onl T A look M 5 Dn Een il m AM TWNINYAL E L oer xl P5 v sees LP Z HOLIMS AS 2 PRINTED WIRING DIAGRAM 1 Indoor AH MP20 TO TERMINAL BOARD TO TERMINAL BOARD BOTTOM N TOP N i 4 ms i 1 FROM HH TERMINAL a BOARD BOTTOM 4 18 OWN EL C E FROM CLEANING SWITCH 2 FROM CLUSTER NS LU 2 AN GENERATOR Ju FROM n FAN MOTOR T gt 65 um ai TO TERMINAL BOARD TOP N BCN101 BCN201 FROM TERMINAL BOARD TOP 1 BLACK FROM FAN MOTOR FROM THERMISTOR FROM CLUSTER GENERATOR FROM CLEANING SWITCH 1 FROM LOUVER MOTOR CHAPTER 3 FUNCTIONS 1 FUNCTION 1 TEMPERATURE CONTROL CHARACTERISTIC 1 1 COOL operation In the COOL mode the thermostat circuit is controlled by five thermostat lines C1 thru C5 Room temperature C 18 32 Preset temperature 1 2 DRY In the DRY mode the thermostat circuit is controlled by three thermostat lines D1 thru D3 o N a C Room temperature C 18 32 Preset temperature C 2 OPERATION MODES 2 1 COOL operation The compressor turns on or off at the thermostat lines C3 and C4 The outdoor fan motor is also controlled with the compressor koom temperature 7 Preset temper
4. unit is not properly installed all lamps on the indicator panel will blink operation are all stop and Remote signal is not accept 11 CHAPTER 4 TROUBLESHOOTING The machine does not function at all with remote controller and switch on the indoor unit Check the cleaning switch 2 1 CN9 CN8 and lead wires Replace the cleaning switch 2 1 YES or reset connector Using a tester measure the measure the secondary voltage voltage between anodes of D1 of transformer and D2 PWB ass NO NO Is the measured value approx 17 5 Vac YES Replace the PWB with a new one Is the WPE1 NO open circuit YES Replace the fuse and varistor Replace the transformer with with new ones a new one 12 The machine does not function with remote controller Push button on the wireless remote controller Are batteries of the NO wireless remote controller proper YES YES Replace the batteries with new ones Replace the wireless YES remote controller Is transmitting NO indicator of the remote controller active 7 Does beep sound from the indoor unit _ NO Is indicator lamp of YES Using a tester indoor unit proper measure the voltage PWB is normal Inspect the outdoor unit between terminals of resistor R26 NO on the PWB ass y Replace the PWB with a new one Pu
5. When automatic air conditioning is selected the operation mode and preset temperature are set automatically according to the room temperature on starting operation 11 2 When JP5 is OFF Auto restart function is not available Room temperature Operation Mode Preset Temperature at operation start Above 28 C 26 C gt 28 C COOL 24 gt 26C Below 24 C oae ORY Room temperature at operation start When DRY mode is selected by the micro computer with AUTO operation the fan speed lamps on the indoor unit panel will indicate identically with the fan speed symbols on the remote control dispaly as the FAN speed setting is changed accordingly Despite as the FAN speed setting is changed accordingly Despite the actual fan speed will not change as it is determined autometically by the micro computer AUTOMATIC FAN SPEED When the automatic fan speed is selected in cool operation the fan speed is automatically changed by the thermostat lines C1 to C3 in cool operation a COOL operation States D amp D States D amp D State CAL Room temperature Room temperature transition Preset temperature 2 TEST MODE the output of operation is switched by pushing the AUX button in the unit or the OI button in the remote controller Normal outputs are shown in Table Keep pushing the AUX buttons and supply the power the system will go to the test mode In this mode
6. 119 __ Connections 1 2 1 4 Drainpipng 0 0020 4 Others Safety device Net dimensions 2 EXTERNAL DIMENSION 1 Indoor unit AH MP20 2 Outdoor unit AU MP20 3 WIRING DIAGRAM Indoor Unit AH MP20 AAT 1 DISPLAY UNT2 _ INDOOR UNIT OUTDOOR O O 3 1H tO MD 1_ OUT BK ME M LE LL BNI CONTROL BOARD UNT L DISPLAY m 1080 1 UNTI LL ln Mi _ LH le 2 Dreesen HD THERMISTOR TERMINAL BOARD S TERMINAL PPE TEMP TENPEUSE _ BOARD THERMISTOR mio ME ROOM TEMP Sort ZA BR SUPPLY CN3 ON EE LOUVER MOTOR i EN LM thi 24504001 GMU TERI 1 Quews dM men Lou Pad Lae o FIN HIGH VOLTAGE MOTOR yet BR BROWN ne GREEN YELLOW 064 Outdoor Unit AU MP20 INDOOR UNIT OUTDOOR UNIT Od d INTERNAL 7 MOTOR CONTROL BK BLACK RED BL BLUE WH WHITE G Y GREEN YELLOW FAN MOTOR CAPACITOR RUNNING CAPACITOR _ 97 COMPRESSOR CHAPTER 2 ELECTRIC CIRCUIT 1 ELECTRIC PARTS 1 INDOOR UNIT AH MP20 X E
7. 14 Loose 3 screws fixing the bulkhead 25 2 Disassembling procedure of the fan 1 Loose the fan nut and fan can take out 2 Loose 2 screw fixing the fan motor angle 3 Cut the nylon band and loose 4 screws fixing the fan motor Sl EN 4 26
8. D lt Outdoor unit QUU Capillary tube Compressor gt lt o Condenser OC 2 PERFORMANCE CURVES Indoor air temp 27 C Indoor humidity 47RH Indoor fan speed Hi 19000 Power supply 50Hz 220V 18000 Cooling capacity BTU h kW 17000 16000 45 2500 2000 Power input W Inside Outlet air temp C 1 LN 30 31 32 33 34 35 36 37 38 39 40 Outside air temp C 16 MODEL AH MP20 1 INDOOR UNIT 1 Disassembling procedure of the indoor unit 1 Open the open panel remove 2 Air Filters 4 Remove the screw fixing the Cord holder 5 Close the Open panel pushing the nail of the Front panel and lift the Front panel up 17 7 Remove a screw fixing the Control box cover 10 Remove the Thermistor of the Evaporator 18 13 Remove 2 screws fixing the Control box and remove it 16 Remove 3 screws fixing the Evaporator 17 Remove the Evaporator from the Cabinet 14 Remove a screw fixing the drain pan and pull Drain pan toward you 18 Remove 4 screws fixing the Side cover R and pull the Cross flow fan 2 The Electric Control box 1 Remove the screw fixing the Receiving filter 4 Remove a screw fixing the Cord holder and 2 screw fixing the Terminal board 2 Remove the 2 Switch and Photo detector unit DD 5 Remove 2 screws fixing the Transformer and pull t
9. SHARP SERVICE MANUAL SPLIT SYSTEM ROOM AIR CONDITIONER INDOOR UNIT AH MP20 OUTDOOR UNIT AU MP20 CONTENTS Page SPECIFICA TIONS 2 EX TERNAL DIMENSIONS inneke TIENES 3 WIRING DIAGRAMS REM 4 ELECIRICAL PARTS RR 5 MICROCOMPUTER CONTROL SYSTEM ane 6 PRINTED WIRING DIAGRAM Han Na E RN Fu CR Su ERR Dau 7 FUNTION m area 8 TROUBLESHOOTING Cousin cd eke ddan iten buena 12 REFRIGERATION CYCLE AND PERFORMANCE CURVES eenen eene nenensenrenenrennn 15 DISASSEMBLING PROGEDURE set teens 17 REPLACEMENT PARTS 27 SHARP CORPORATION 1 CHAPTER 1 PRODUCT SPECIFICATION 1 SPECIFICATION 1 AH MP20 AU MP20 INDOOR UNIT OUTDOOR UNIT 20 AU MP20 Moisture removal _ Electrical data Compressor Refrigerant system Noise level at cooling Mid 37 tow 5 Fan system Air flow quantity High 47 5 at cooling 34 Low
10. ature C 2 2 DRY On the switch on the compressor always starts to operate for 2 minutes with fan speed DL The microcomputer reads the room temperature 2 minutes after this first compressor operation This room temperature is set as the preset temperature The preset temperature ranges from 18 C to 32 C When the room temperature is below 18 the preset temperature is set to 18 and when the room temperature is over 32 the preset temperature is set to 32 C Dry operation is divided into three zones Cooling zone Dehumidifying zone and Circulating zone by thermostat lines D1 to D3 and the compressor and the fan motor are controlled in each zone as shown in Table Q Do 60 U e Room temperature C 18 32 Preset temperature J Compressor speed 3 FAN SPEED Fan speeds are given by the indoor fan motor DL HH which are available in the following operation mode Fan Fan switch AH MP20 speed AUTO DL Hay DH COOLSOFT 80 Ee COOLLOW COOL ee 1020 COOLHIGH 1170 Lou 4 TEST OUTPUTS IN EACH OPERATION MODE If the AUX button on the unit is pressed for 5 seconds or more during operation cool test operation starts The operation LED red flickers bonnes Outdoor Indoor Valve Coil during test run Fan Motor Fan oN ORE EE ui x 2 To put the system in the heating t
11. est run mode start the cooling LQ Cooling Circulat operation and select the heating mode the remote control In cool and heat mode continuous compressor on operation is performed In ing dry mode the operation is in dehumidifiying zone In fan only mode the ON ON L UL indoor fan motor runs continusly nei ON ON UL D OFF midiflying 5 TIMER 5 1 ON OFF Timer When the unit operates during one hour after the OFF time is set ther mostart setting is automatically shifted in operation and dry operation When the ON timer is set in cool POWER ON START operation operation starts before 0 to 30 minutes depends on the room If the connecting wire POWER ON JP99 is cut on the PWB temperature so that preset temperature is obtaind at set time ass y when the power is supplied by turning on a circuit breaker the air conditioner automatically starts of operation in AUTO Refer to Printed Wiring Board 5 2 hour timer When ONE HOUR timer is set the unit turns off automatically after one hour The one hour timer operation has priority over other time operation such as the TIMER ON and TIMER OFF If the ONE HOUR TIMER button is pressed again during operation the unit will operate AUTO RESTART 11 1 additionally for another one hour When JP5 is ON Power failuer occurs during operation the unit will restart in the AUTOMATIC AIR CONDITIONING same operation mode as before recovery
12. he F Control board unit EET MUZE T ONA en by 20 3 The Drain pan and related 1 Remove the screw fixing the Drain pan on both side 2 Turn left the Drain hose 21 4 The Louver frame unit and related 3 Remove the connector of louver motor and take off the 1 Remove the screw fixing the frame guide on both side and take off the louver unit wire and holder 2 mn me A T 4 Put the one of the vertical louver A LAAN 2 Remove 2 screws fixing and cover r and take off them 22 5 How to remove the display cover 1 Put the center of the front panel under the display cover 2 Side it to one side 6 How to remove the hi voltage unit 1 Remove 2 screws fixing holder 2 Take off the high voltage unit ass y from the holder 3 Remove the connector of high voltage unit ass y i l I9 inn 23 MODEL AU MP20 2 OUTDOOR UNIT 1 Disassembling procedure of the control box 1 Loose 3 screws fixing the control cover 5 Loose 1 screw fixing the cabinet rear side 2 Loose 1 screw fixing the side cover 8 Loose 7 screws fixing the rear cabinet 24 9 Loose 1 screw fixing the rear cabinet left side 12 Remove the terminal cover gum 10 Cut nylon band 13 Remove 3 terminal 11 Loose 1 screw fixing the control box
13. sh the button When the signal is received does the voltag change NO Replace the photo YES detector unit with a new one Replace the PWB with a new one 13 The room is not cooled at all or not cooled The compressor does not operate Fig 1 Temperature properties of indoor thermistors Kn 100 Push the button AUX on the indoor unit for more than 5 sec 80 Ta measure the resistance fi ihe connector as shown at ri rst remove right 1 Heat exchange thermistor TH 40 25 C resistance 15 Using a tester measure voltage at the terminals on the terminal board Is the voltage between terminal and 1 of the terminal board the power supply voltage NO YES Measure resistances of TH1 and TH2 Are the resistances conformed Fig 1 NO oom temperature Heat thermistor TH ihermistor THE d Replace the thermistor ass y with a new one Replace the PWB ass y with a new one The control circuit is normal compressor may be defective The running capacitor may be defective Refrigerant may be leaked outdoor fan motor may be defective e The outdoor fan motor capacitor may be defective 14 CHAPTER 5 REFRIGERANTION CYCLE AND PERFORMANCE CURVES 1 REFRIGERANT CYCLE Indoor unit Flare coupling Z Flare coupling S lt N
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