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Carrier 38MPRAQ09AA3, Service Manual

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Carrier 38MPRAQ09AA3 Service Manual Download Page 5

SG-38MPRA-02                                                                            Specifications subject to change without notice.                                                                                         

5

Sizes 18K and 24K

Fig. 2 — Sizes 18K and 24K

SYSTEM SIZE

HEIGHT (H) IN. (MM)

WIDTH (W) IN. (MM)

DEPTH (D) IN. (MM)

WEIGHT-NET LBS. (KG)

18K

(208/230V)

31.89 (810)

37.24 (946)

16.14 (410)

135.4 (61.4)

24K

(208/230V)

31.89 (810)

37.24 (946)

16.14 (410)

145.1 (65.8)

0.94 in(24 mm)

2.87 in (73 mm)

Summary of Contents for 38MPRAQ09AA3

Page 1: ...ER WARNING and CAUTION These words are used with the safety alert symbol DANGER identifies the most serious hazards which will result in severe personal injury or death WARNING signifies hazards which...

Page 2: ...NIT MP MODEL VOLTAGE 3 208 230 1 60 SYSTEM TYPE R OUTDOOR UNIT MAJOR SERIES MAXIMUM NUMBER OF FAN COIL UNITS THAT CAN BE CONNECTED A 1 1 NOMINAL CAPACITY 09 3 4 TON 12 1 TON 18 1 5 TONS 24 2 TONS A VA...

Page 3: ...1 4 6 35 1 4 6 35 3 8 9 52 3 8 9 52 Pipe Connection Size Suction in mm 3 8 9 52 1 2 12 7 5 8 15 9 5 8 15 9 REFRIGERANT Type R410A R410A R410A R410A Charge lbs kg 3 5 1 58 3 5 1 58 5 7 2 6 6 5 2 95 Me...

Page 4: ...Height H in mm Width W in mm Depth D in mm Weight Net lbs kg 9K 208 230V 27 64 702 33 27 845 14 29 363 107 59 48 8 12K 208 230V 27 64 702 33 27 845 14 29 363 108 47 49 2 13 78 350 B 1 42 36 A3 7 83 1...

Page 5: ...ice 5 Sizes 18K and 24K Fig 2 Sizes 18K and 24K SYSTEM SIZE HEIGHT H IN MM WIDTH W IN MM DEPTH D IN MM WEIGHT NET LBS KG 18K 208 230V 31 89 810 37 24 946 16 14 410 135 4 61 4 24K 208 230V 31 89 810 37...

Page 6: ...r outlet Air inlet C E UNIT MINIMUM VALUE IN MM A 24 609 B 24 609 C 24 609 D 4 101 E 4 101 118in 300cm ormore 19in 48cm ormore onamultipleparallel unitarrangement 4in 10cm ormoreon asingleparallelunit...

Page 7: ...s NOT recommended If installed in a high Electromagnetic field EMF area and communication issues exists a 14 2 stranded shielded wire can be used to replace L2 and S between the outdoor unit and indoo...

Page 8: ...nnections are polarity sensitive and improper wiring will result in a fault code E1 Double check the control wiring before applying power to the outside unit S L1 L2 208 230 1 60 Main Power Supply L1...

Page 9: ...320VDC to outdoor fan motor CN6 1 Ground Connector CN5 CN4 Output 220 VAC High voltage to base pan heater CN18 Output Pin5 6 12V to electronic expansion valve ABBREVIATION PARAPHRASE 4 Way Refrigeran...

Page 10: ...tage CN13 Pin1 Pin3 Pin5 Pin7 Pin9 5VDC Pin2 Pin4 Pin6 Pin8 Pin10 0 5VDC CN33 Input Pin1 0 5VDC Pin2 5VDC Discharge Temp CN8 Input Pin3 Pin4 5VDC Pin2 0VDC Pin1 Pin5 0 5VDC CN9 Input Pin2 Pin4 0VDC Pi...

Page 11: ...ARGE TEMPERATURE SENSOR FM1 OUTDOOR DC FAN SV 4 WAY VALVE FAN1 OUTDOOR AC FAN T3 CONDENSER TEMPERATURE SENSOR EEV ELECTRONIC EXPANSION VALVE T4 OUTDOOR AMBIENT TEMPERATURE SENSOR H PRO HIGH PRESSURE S...

Page 12: ...0 8 2 VOLTS V 208 230 208 230 208 230 208 230 PHASE 1 1 1 1 HERTZ HZ 60 60 60 60 FLA A 0 6 0 6 0 6 0 6 RATED HP HP 0 156 0 156 0 156 0 156 OUTPUT W 50 50 120 120 TYPE DC DC DC DC INSULATION CLASS E E...

Page 13: ...mum allowed lengths Table 12 Piping and Refrigerant Information Long Line Applications 1 No change in line set diameter size is required 2 Add refrigerant per the Additional Charge Table Table 13 Addi...

Page 14: ...and proceed as follows 1 Pump the system down to 1500 microns and allow the pump to continue operating for an additional 15 minutes 2 Close the service valves and shut off the vacuum pump 3 Connect a...

Page 15: ...operate after a period of setting time or when the louver is in place If the unit is in the HEATING mode the indoor fan is regulated by the anti cold wind function Compressor Preheating Preheating is...

Page 16: ...ompressor running frequency is more than the test frequency When the compressor running frequency is equal to the test frequency T4 is more than 59 F 15 C or no T4 or T4 fault Change setting temperatu...

Page 17: ...n T1 Tsc is lower than or equal to 1 5 F 3 C fan speed increases to 100 Outdoor Fan Control The outdoor unit runs at a different fan speed according to T4 and the compressor running frequency For diff...

Page 18: ...e unit to restart automatically The module automatically stores the current settings and in the case of a sudden power failure will restore those setting automatically within 3 minutes after power ret...

Page 19: ...es If successful you will hear beeps for two seconds Use LED and SWING to cycle through the information displayed Press LED to display the next code in the sequence Press SWING to display the previous...

Page 20: ...ldering iron plug between the terminals of the electrolytic capacitor on the other side of the outdoor PCB Fig 15 Discharge Position NOTE Fig 15 is for reference only Actual appearances may vary UNIT...

Page 21: ...Pages 30 31 E2 Zero crossing detection error diagnosis and solution Page 32 E3 The indoor fan speed is operating outside of the normal range Page 33 E4 Indoor room temperature sensor T1 is in open cir...

Page 22: ...from cell phones towers and remote boosters Shipping plates remained attached Unit will not start Operation is erratic unpredictable or unit is unresponsive Cannot set desired temp Unit is on but the...

Page 23: ...essor and condenser outdoor fan will not start Evaporator indoor fan will not start Condenser outdoor fan will not start Unit runs but shortly stops Compress or short cycles due to overload High disch...

Page 24: ...alve Power installation of feeler bulb Unit will not start Compressor will not start however the fan runs Compressor and condenser outdoor fan will not start Evaporator indoor fan will not start Conde...

Page 25: ...l not start however the fan runs Compressor and condenser outdoor fan will not start Evaporator indoor fan will not start Condenser outdoor fan will not start Unit runs but shortly stops Compress or s...

Page 26: ...x Outdoor fan motor x x x x X x x x x x Temperature sensor x x x x x x x x T2 Sensor x x x x x x x x x x Additional refrigerant x x x x x x x x x x Compressor x x x x x x x x x IPM board x x x x x x x...

Page 27: ...nsors Room temp T1 sensor Indoor coil temp T2 sensor Outdoor coil temp T3 sensor Outdoor ambient temp T4 sensor Compressor discharge temp Tp sensor Measure the resistance value of each winding by usin...

Page 28: ...the power Allow the large capacity electrolytic capacitors to discharge completely and dismount the IPM Use a digital tester to measure the resistance between P and UVWN UVW and N Table 25 IPM Contin...

Page 29: ...ROM chip on the indoor and outdoor PCB is shown in Figures 18 and 19 Fig 18 EEPROM Chip Indoor Unit Fig 19 EEPROM Chip Outdoor Unit NOTE Figures 18 and 19 are for reference only The unit is operating...

Page 30: ...voltage between S and N on the outdoor unit Red pan S Black pan N YES Is the voltage moving alternately between positive and negative Is it normal YES Is it normal YES Is the error resolved NO NO Che...

Page 31: ...s for 3 port When the air conditioner is normal running the voltage is moving alternately as positive values and negative values If the outdoor unit has a malfunction the voltage has always been the p...

Page 32: ...ve zero crossing signal feedback for 4 minutes or the zero crossing signal time interval is abnormal Recommended parts to prepare Connection wires PCB Troubleshooting Check the connections and power s...

Page 33: ...me the unit stops and the LED displays the failure F5 Recommended parts to prepare Wiring Faulty fan assembly Faulty fan motor Faulty PCB Troubleshooting YES Is it within normal parameters Replace the...

Page 34: ...n normally the PCB must have a problem and needs to be replaced If the fan can not run normally measure the resistance of each pin two If the resistance is not equal to each other the fan motor must h...

Page 35: ...module malfunctions the LED displays the failure Recommended parts to prepare Occupancy Sensor Troubleshooting NO YES NO YES Power off Wait 2 minutes then restart Is the unit still displaying an erro...

Page 36: ...ockage Faulty PCB Troubleshooting Check the power supply Is it in working order NO Check the connections and wires YES Are they in working order Ensure proper connections or replace the wires NO Power...

Page 37: ...tion If the temperature of IPM module is higher than limited value the LED displays this failure code Recommended parts to prepare Faulty PCB Connection problems Troubleshooting Check the fastening sc...

Page 38: ...Outdoor PCB faulty Troubleshooting Check the wiring between the PCB and compressor Is it improperly wired Ensure proper connections or replace the wires and connectors YES Check the IPM NO Is it func...

Page 39: ...0 06V or higher than 4 94V the LED displays the failure Recommended parts to prepare Wiring mistake Faulty sensor Faulty PCB Troubleshooting Fig 25 Multimeter Check the connection between temperature...

Page 40: ...ded parts to prepare Wiring mistake PCB faulty Display board malfunction Troubleshooting Is it still displaying the error code The unit operates normally NO Check the wirings and connection YES Is it...

Page 41: ...ng mistake Compressor malfunction Troubleshooting Check the power supply Do any exist Are they within acceptable parameters Are they properly connected Is it in working order Replace the outdoor unit...

Page 42: ...door fan assembly Compressor malfunction Faulty outdoor PCB Troubleshooting Check the wiring between PCB and compressor Does an error exist Ensure proper connections or replace the wires and connector...

Page 43: ...11 2 11 9 90 73 32 22 22 78 7 7 7 8 9 6 10 5 10 3 9 5 10 0 10 6 12 4 13 0 PSI 70 59 21 11 15 93 94 106 116 119 113 117 125 147 154 75 63 23 89 17 22 97 99 115 125 124 120 126 132 155 162 80 67 26 67 1...

Page 44: ...2 17 19 17 18 27 28 BAR 55 12 78 30 3 28 5 25 3 22 8 20 8 18 5 16 5 65 18 33 32 5 30 0 26 6 25 4 23 3 20 5 19 0 75 23 89 33 8 31 5 27 8 26 3 24 9 21 5 20 0 PSI 55 12 78 439 413 367 330 302 268 239 65...

Page 45: ...208 230V Panel Plate n o i t a r t s u l l I e r u d e c o r P 1 Turn off the air conditioner and the power breaker 2 Remove the big handle screws 3 then remove the big handle 3 Remove the top cover s...

Page 46: ...Unit Sizes 9K 12K 208 230V continued Panel Plate n o i t a r t s u l l I e r u d e c o r P 4 Remove the front panel screws 7 and remove the front panel 5 Remove the water collecting cover screws 1 an...

Page 47: ...ns subject to change without notice 47 Outdoor Unit Sizes 9K 12K 208 230V continued Panel Plate n o i t a r t s u l l I e r u d e c o r P 6 Remove the screws 6 from the right panel and then remove the...

Page 48: ...e electronic control box cover 4 hooks Hook 2 Remove the compressor connector 3 Remove the two blue wires connected to the four way valve 4 Remove the condenser coil temp sensor T3 outdoor ambient tem...

Page 49: ...NOTE Remove the panel plate and the connection of fan motor on PCB refer to Panel Plate and Electrical Parts before disassembling the fan motor n o i t a r t s u l l I e r u d e c o r P 1 Remove the...

Page 50: ...nel plate electrical parts and fan assembly refer to Panel Plate Electrical parts Fan assembly before disassembling the sound blanket Recover refrigerant from the refrigerant circuit before removing t...

Page 51: ...ve NOTE Remove the panel plate electrical parts and fan assembly refer to Panel plate Electrical parts and Fan assembly before disassembling the four way valve n o i t a r t s u l l I e r u d e c o r...

Page 52: ...ctrical parts and fan assembly refer to Panel plate Electrical parts and Fan assembly before disassembling compressor Recover refrigerant from the refrigerant circuit before removing the compressor WA...

Page 53: ...Compressor n o i t a r t s u l l I e r u d e c o r P 3 Remove the hex nuts and washers securing the compressor located on the bottom plate 4 Heat up the brazed parts then remove the discharge pipe an...

Page 54: ...V Panel Plate Procedure Illustration 1 Turn off the air conditioner and the power breaker 2 Remove the screws of the big handle Next remove the big handle 2 screws 3 Remove the top cover screws 4 and...

Page 55: ...otice 55 Outdoor Unit Sizes 18K 24K 208 230V continued Panel Plate Procedure Illustration 4 Remove the front right panel screws 2 Next remove the front right panel 5 Remove the front panel screws 9 Ne...

Page 56: ...PRA 02 Outdoor Unit Sizes 18K 24K 208 230V continued Panel Plate Procedure Illustration 6 Remove the water collecting cover screws 2 and then remove the water collecting cover 7 Remove the rear screen...

Page 57: ...02 Specifications subject to change without notice 57 Outdoor Unit Sizes 18K 24K 208 230V continued Panel Plate Procedure Illustration 8 Remove the right panel screws 8 Next remove the right panel Ri...

Page 58: ...ration 1 Release the hooks and open the electronic control box cover 4 hooks 2 Disconnect the connector for the outdoor DC fan from the electronic control board 3 Remove the compressor connector 4 Rem...

Page 59: ...y NOTE Remove the panel plate and the connection of fan motor on PCB refer to Panel Plate and Electrical Parts before disassembling the fan motor n o i t a r t s u l l I e r u d e c o r P 1 Remove the...

Page 60: ...anel plate electrical parts and fan assembly refer to Panel Plate Electrical parts Fan assembly before disassembling the sound blanket Recover refrigerant from the refrigerant circuit before removing...

Page 61: ...ve NOTE Remove the panel plate electrical parts and fan assembly refer to Panel plate Electrical parts and Fan assembly before disassembling the four way valve n o i t a r t s u l l I e r u d e c o r...

Page 62: ...ectrical parts and fan assembly refer to Panel plate Electrical parts and Fan assembly before disassembling compressor Recover refrigerant from the refrigerant circuit before removing the compressor W...

Page 63: ...d Compressor n o i t a r t s u l l I e r u d e c o r P 3 Remove the hex nuts and washers securing the compressor located on the bottom plate 4 Heat up the brazed parts then remove the discharge pipe a...

Page 64: ...006 3 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...

Page 65: ...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 66: ...2 60 140 91 195 8 122 251 6 2 5 36 5 30 86 61 141 8 92 197 6 123 253 4 3 37 4 31 87 8 62 143 6 93 199 4 124 255 2 3 5 38 3 32 89 6 63 145 4 94 201 2 125 257 4 39 2 33 91 4 64 147 2 95 203 126 258 8 4...

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