Midea DLCERAA12AAJ Service Manual Download Page 36 | Manualshive

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36

32808001101

Specifications subject to change without notice.

DIAGNOSIS AND SOLUTION (CONT)

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Summary of Contents for DLCERAA12AAJ

Page 1: ...nal injury Understand these signal words DANGER WARNING and CAUTION These words are used with the safety alert symbol DANGER identifies the most serious hazards which will result in severe personal in...

Page 2: ...DLCERAH18AAK 2 00 24 000 208 230 1 DLCERAH24AAK A R 09 A MAJOR SERIES UNIT TYPE R OUTDOOR UNIT MAXIMUM NUMBER OF FAN COIL UNITS THAT CAN BE CONNECTED TO THE OUTDOOR UNIT A 1 1 OUTDOOR UNIT DLC E K H...

Page 3: ...2 12 7 1 2 12 7 5 8 16 Refrigerant Type R410A R410A R410A R410A Charge lbs kg 1 30 0 59 1 30 0 59 2 09 0 95 2 64 1 20 Metering Device EEV EEV EEV EEV Outdoor Coil Face Area Sq Ft 4 15 4 15 4 78 4 78...

Page 4: ...1 2 12 7 3 8 9 52 1 2 12 7 1 2 12 7 5 8 16 Refrigerant Type R410A R410A R410A R410A R410A Charge lbs kg 2 11 0 96 1 76 0 80 2 11 0 96 2 82 1 28 3 97 1 80 Metering Device EEV EEV EEV EEV EEV Outdoor C...

Page 5: ...40 2 Heat Pump System Size Height H in mm Width W in mm Depth D in mm Weight Net lbs kg 12K 115V 21 85 555 30 31 770 11 81 300 69 0 31 3 9K 208 230V 21 85 555 30 31 770 11 81 300 63 0 28 6 12K 208 230...

Page 6: ...DIMENSIONS OUTDOOR CONT 31 50 800 20 24 514 21 81 554 2 36 6 0 3 37 8 5 5 13 39 340 0 47 1 2 12 24 311 12 80 325 13 11 333 2 76 7 0 H H1 H2 D1 D2 D3 2 43 6 1 8 4 17 1 06 0 87 2 2 R 0 79 R 20 R 0 24 R...

Page 7: ...32808001101 7 Specifications subject to change without notice DIMENSIONS OUTDOOR CONT Unit inch mm Fig 3 Size 24K...

Page 8: ...above the maximum anticipated snow depth 118in 300cm ormore 19in 48cm ormore onamultipleparallel unitarrangement 4in 10cm ormoreon asingleparallelunit arrangement 24in 60cm ormore 59in 150cm ormoreona...

Page 9: ...d to the outdoor unit The field supplied 14 3 stranded wire with ground with a 600 volt insulation rating power communication wiring from the outdoor unit to indoor unit consists of four 4 wires and p...

Page 10: ...4 WAY CN 50 DC FAN OPTIONAL DC FAN CN 7 3 AC FAN OPTIONAL AC FAN 5 CN 25 CN 60 OPTIONAL CRANKCASE HEATER CN 17 OPTIONAL L B E U BROWN YELLOW OR BLACK 72 1 225 81 7 S N N 9 32 5 6833 D E R L B E U Y G...

Page 11: ...FAN CAPACITOR OPTIONAL AC FAN 5 3 Y G Notes This symbol indicates the element is optional the actual shape shall prevail CN 32 CN 9 REACTOR 1005AL OPTIONAL BLUE BLUE MAIN BOARD CN 25 RED BLUE 2 1 1 1...

Page 12: ...only Applicable to the units adopting AC motor only Y G CN30 CN10 CN1 CONDENSER TEMPERATURESENSOR OUTDOORAMBIENT TEMPERATURESENSOR WHITE BLACK DISCHARGESENSOR K C A L B D E R CN17 RED BLACK BLACK CN2...

Page 13: ...3 7 7 Notes This symbol indicates the element is optional the actual shape shall prevail S Yellow Red Blue According to the real objects 16022000B23636 COMPRESSOR BLUE BLACK CN 21 CN29 CN28 CN27 BLUE...

Page 14: ...E DIAGRAMS LIQUID SIDE GAS SIDE HEAT EXCHANGE EVAPORATOR HEAT EXCHANGE CONDENSER COMPRESSOR 2 WAY VALVE 3 WAY VALVE 4 WAY VALVE COOLING HEATING T2 Evaporator temp sensor T1 Room temp sensor ACCUMULATO...

Page 15: ...ts the maximum lengths allowed Table 7 Piping and Refrigerant Information System Size 12V 115V 9K 208 230V 12K 208 230V 18 208 230V 24K 208 230V Piping Min Piping Length ft m 9 8 3 9 8 3 9 8 3 9 8 3 9...

Page 16: ...requires a vacuum pump capable of pulling a vacuum of 500 microns and a vacuum gage capable of accurately measuring this vacuum depth The deep vacuum method is the most positive way of assuring a sys...

Page 17: ...arts Compressor discharge temperature protection Compressor discharge temp T5 239_F 115_C for 5s compressor stops Fan Speed is Out of Control When the indoor fan speed remains too low 300RPM the unit...

Page 18: ...nning Rules The auto fan adheres to the following rules Fig 20 Auto Fan Fig 21 Compressor Temperature Protection When the condenser temperature temperature is higher than the setting value the compres...

Page 19: ...ze and can not be changed The louver angle is the same as in the cooling mode Low indoor room temperature protection In the DRYING mode if the room temperature is lower than 50_F 10_C the compressor s...

Page 20: ...button three times in ten seconds the buzzer rings for two seconds The air conditioner enters into the information enquiry status Press the LED DISPLAY or AIR DIRECTION button to check the next or fr...

Page 21: ...imum value 19 99 19 99 A0 A1 A9 100 101 109 b0 b1 b9 110 111 119 c0 c1 c9 120 121 129 d0 d1 d9 130 131 139 E0 E1 E9 140 141 149 F0 F1 F9 150 151 159 Indoor fan speed Outdoor fan speed 0 OFF 1 2 3 4 Lo...

Page 22: ...electricity power in capacitor Electrolytic Capacitors HIGH VOLTAGE CAUTION Fig 25 Electrolytic Capacitors For other models please connect discharge resistance approximately 100 40W or a soldering ir...

Page 23: ...ge detection 1 time O F0 Overload current protection 2 times O F1 Outdoor ambient temperature sensor T4 open circuit or short circuit 3 times O F2 Condenser coil temperature sensor T3 open circuit or...

Page 24: ...ication EEPROM Programmer Port Test Port bridge IPM for compressor IPM for DC FAN P Fig 27 Size 12k 115V T4 TP T3 N L H N N Rdi Have Low Fre YES NO No U BLUE V RED W BLACK TESTPORT PMV DC FAN DR_L DR_...

Page 25: ...blems Table 12 LED Codes No Problems LED3 Green LED2 Red IU display 1 Standby for normal O X 2 Operation normally X O 3 IPM malfunction or IGBT over strong current protection X P0 4 Over voltage or to...

Page 26: ...EEPROM chip Supposed causes S Installation mistake S PCB faulty Troubleshooting Yes Replace the indoor outdoor main PCB Power off then restart the unit 2 minutes later EEPROM A read only memory whose...

Page 27: ...stake S Indoor or outdoor PCB faulty Troubleshooting Measure Vs is it a positive fluctuation Vs represents the voltage S and N of the outdoor unit Red pan S Black pan N Power off then restart the unit...

Page 28: ...t When air conditioner is running normal the voltage moves alternately between 50V to 50V If the outdoor unit has a malfunction the voltage will move alternately with positive value If the indoor unit...

Page 29: ...itions When the PCB does not receive a zero crossing signal feedback for 4 minutes or the zero crossing signal time interval is abnormal Supposed causes S Connection mistake S PCB faulty Troubleshooti...

Page 30: ...tops and the LED displays the failure Supposed causes S Wiring mistake S Fan assembly faulty S Fan motor faulty S PCB faulty Troubleshooting Power off then restart the unit 2 minutes later Shut off th...

Page 31: ...put voltage 115V NO COLOR SIGNAL VOLTAGE 1 Red Vs Vm 140V 190V 2 3 Black GND 0V 4 White Vcc 14 17 5V 5 Yellow Vsp 0 5 6V 6 Blue FG 14 17 5V 2 Outdoor DC Fan Motor control chip is in the outdoor PCB Po...

Page 32: ...on decision conditions If the sampling voltage is lower than 0 06V or higher than 4 94V the LED displays the failure Supposed causes S Wiring mistake S Sensor faulty S PCB faulty Troubleshooting Check...

Page 33: ...6_F Tcool 2 _C does not run for 4 seconds and this situation occurs 3 times the display area displays EC and the air conditioner will turn off Supposed causes S T2 sensor faulty S Indoor PCB faulty S...

Page 34: ...ction circuit Supposed causes S Power supply problems S System blockage S PCB faulty S Wiring mistake S Compressor malfunction Troubleshooting Check the power supply Check the connections and wires St...

Page 35: ...posed causes S Wiring mistake S IPM malfunction S Outdoor fan assembly faulty S Compressor malfunction S Outdoor PCB faulty Troubleshooting Check the wiring between main the PCB and the compressor Cor...

Page 36: ...36 32808001101 Specifications subject to change without notice DIAGNOSIS AND SOLUTION CONT Fig 36 P U Fig 37 P V...

Page 37: ...32808001101 37 Specifications subject to change without notice DIAGNOSIS AND SOLUTION CONT Fig 38 P W Fig 39 N U...

Page 38: ...38 32808001101 Specifications subject to change without notice DIAGNOSIS AND SOLUTION CONT Fig 40 N V Fig 41 N W...

Page 39: ...age detection circuit Supposed causes S Power supply problems S System leakage or block S PCB faulty Troubleshooting Check the power supply Check the connections and wires Stop the unit No Yes No Corr...

Page 40: ...de P2 Malfunction decision conditions If the sampling voltage is not 5V the LED displays the failure Supposed causes S Power supply problems S System leakage or block S PCB faulty Troubleshooting Yes...

Page 41: ...ction etc Supposed causes S Wiring mistake S IPM malfunction S Outdoor fan assembly faulty S Compressor malfunction S Outdoor PCB faulty Troubleshooting Check the wiring between main PCB and compresso...

Page 42: ...Disconnect the temperature sensor from the PCB measure the resistance value with a tester Fig 43 Tester Temperaturesensors Room temp T1 sensor Indoor coil temp T2 sensor Outdoor coil temp T3 sensor O...

Page 43: ...CONT Compressor Checking Measure the resistance value of each winding by using the tester Fig 44 Tester Table 15 Compressor Checking Position Resistance Value ASN98D22UFZ ASM135D23UFZ ATF235D22UMT ATF...

Page 44: ...sistancebetween P and UVWN UVW and N Table 16 IPM Continuity Check Digital Tester Normal Resistance Value Digital Tester Normal Resistance Value Red Black Several M Red Black Several M P N U N U V V W...

Page 45: ...0 1 BAR 75 63 8 6 8 3 8 7 9 1 10 7 BAR 80 67 9 3 8 9 9 1 9 6 11 2 F C ODT IDT 75 23 89 85 29 44 95 35 105 40 56 115 46 11 PSI 70 59 119 113 117 125 147 PSI 75 63 124 120 126 132 155 PSI 80 67 135 129...

Page 46: ...65 32 5 30 0 26 6 25 4 23 3 BAR 75 33 8 31 5 27 8 26 3 24 9 F C ODT IDT 57 53 13 89 11 67 47 43 8 33 6 11 37 33 2 78 0 56 27 23 2 78 5 17 13 8 33 10 56 PSI 55 439 413 367 330 302 PSI 65 471 435 386 3...

Page 47: ...remove the panel plate 1 Stop the air conditioner and turn OFF the power breaker 2 Remove the big handle first and then remove the top cover 3 screws 3 Remove the front panel screws 7 4 Remove the rig...

Page 48: ...How to remove the fan assembly 1 Remove the nut securing the fan and remove the fan 2 After removing the top cover release the hooks and open the electronic control box cover 3 Disconnect the fan mot...

Page 49: ...32808001101 49 Specifications subject to change without notice DISASSEMBLY INSTRUCTIONS SIZES 12K 115V CONT 5 4 Remove the fan motor screws 4 then remove the motor...

Page 50: ...trical parts How to remove the electrical parts 1 After you complete the steps in item 1 and 2 remove the compressor connector 2 Pull out the two blue wires connected to the four way valve 3 Pull out...

Page 51: ...ct to change without notice DISASSEMBLY INSTRUCTIONS SIZES 12K 115V CONT 4 Disconnect the electronic expansion valve wire from the control board 5 Remove the ground wires 6 Remove the wires 1 2 3 7 Re...

Page 52: ...oil 4 Detach the welded parts of the four way valve and pipe 5 Remove the four way valve assembly The picture of four way valve may be different from your actual valve 5 Compressor How to remove the c...

Page 53: ...nel plate How to remove the panel plate 1 Stop the air conditioner and turn OFF the power breaker 2 Remove the big handle first then remove the top panel 3 screws 3 Remove the front panel screws 6 4 R...

Page 54: ...08 230V CONT 2 Fan assembly How to remove the fan assembly 1 After removing the panel plate using section 1 remove the hex nut securing the fan then remove the fan 2 Release the hooks and open the ele...

Page 55: ...he fan motor connector and from the electronic control board 4 Remove the fan motor screws 4 Then remove the fan motor 3 Electrical parts How to remove the electrical parts 1 After completing the work...

Page 56: ...ZES 9 12K 208 230V CONT 3 Pull out connectors of the condenser coil temp sensor T3 outdoor ambient temp sensor T4 and discharge temp sensor T5 4 Disconnect the electronic expansion valve wire 5 Remove...

Page 57: ...e the coil 4 Detach the welded parts of the four way valve and pipe 5 Remove the four way valve assembly The picture of four way valve may differ from your actual valve 3 4 5 Compressor How to remove...

Page 58: ...No Part name Procedures Remarks Panel plate How to remove the panel plate 1 Stop the air conditioner and turn OFF the power breaker 2 Remove the top panel screws 3 3 Remove the front panel screws 9 4...

Page 59: ...assembly 1 After removing the panel plate using section 1 remove the hex nut securing the fan then remove the fan 2 After removing the top cover release the hooks then open the electronic control box...

Page 60: ...8K 208 230V CONT 3 Disconnect the connector for fan motor from the electronic control board 4 Remove the fan motor screws Then remove the fan motor 3 Electrical parts How to remove the electrical part...

Page 61: ...NSTRUCTIONS SIZES 18K 208 230V CONT 2 Pull out the two blue wires connected to the four way valve 3 Remove the connectors of the condenser coil temp sensor T3 outdoor ambient temp sensor T4 and discha...

Page 62: ...ions subject to change without notice DISASSEMBLY INSTRUCTIONS SIZES 18K 208 230V CONT 5 Remove the electric heaters 6 Remove the grounding screw 7 Remove the wires 1 2 3 or L1 L2 S Then remove the el...

Page 63: ...e the coil 4 Detach the welded parts of four way valve and pipe 5 Remove the four way valve assembly The picture of four way valve may differ from your actual valve 3 5 Compressor How to remove the co...

Page 64: ...Panel plate How to remove the panel plate 1 Stop the air conditioner and turn OFF the power breaker 2 Remove the big handle first then remove the top cover 7 screws 3 Remove the front panel screws 11...

Page 65: ...24K 208 230V CONT 2 Fan assembly How to remove the fan assembly 1 Remove the panel plate using the steps in section 1 2 Remove the nut securing the fan then remove the fan 3 Release the hooks and remo...

Page 66: ...NSTRUCTIONS SIZES 24K 208 230V CONT 4 Disconnect the fan motor connector from the electronic control board 5 Remove the fan motor screws 4 of the fan motor then remove the motor 5 4 T3 T4 T5 sensor Pr...

Page 67: ...ts Electrical 1 How to remove the electrical parts 2 Pull out the two blue 3 After completing the work in sections 1 and 2 remove the compressor connector wires connected with the four way valve 1 2 3...

Page 68: ...SEMBLY INSTRUCTIONS SIZES 24K 208 230V CONT 4 5 Disconnect the pressure switch connector 6 7 Remove the ground wires Disconnect the electronic expansion valve wire from the control board 6 7 5 Remove...

Page 69: ...en remove the coil 4 Detach the welded parts of four way valve and pipe 5 Remove the four way valve assembly The picture of four way valve may differ from your actual valve 5 Compressor How to remove...

Page 70: ...27 41 5878 37 99 5 87359 77 171 1 29078 117 243 0 38991 2 28 39 8239 38 100 5 62961 78 172 1 25423 118 244 0 37956 1 30 37 1988 39 102 5 39689 79 174 1 2133 119 246 0 36954 0 32 35 2024 40 104 5 17519...

Page 71: ...9 35 95 35 78 75 167 8 084 115 239 2 422 4 25 222 8 36 97 34 32 76 169 7 82 116 241 2 357 3 27 211 4 37 99 32 94 77 171 7 566 117 243 2 294 2 28 200 7 38 100 31 62 78 172 7 321 118 244 2 233 1 30 190...

Page 72: ...01 2 125 257 4 39 2 33 91 4 64 147 2 95 203 126 258 8 4 5 40 1 34 93 2 65 149 96 204 8 127 260 6 5 41 35 95 66 150 8 97 206 6 128 262 4 6 42 8 36 96 8 67 152 6 98 208 4 129 264 2 7 44 6 37 98 6 68 154...

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