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Carrier 38MFC, Service Manual

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Carrier 38MFC Service Manual Download Page 21

21

1 --- EEPROM parameter error --- diagnosis and solution (E0/F4)

Error Code

E0/F4

Malfunction conditions

Indoor or outdoor PCB main chip does not receive feedback from EEPROM chip.

Possible Causes

• Installation mistake
• Defective PCB

Trouble shooting:

If the EEPROM chip  
is welded on main 
PCB, replace the 
main PCB directly. 
Otherwise, check 
whether  the 
EEPROM chip is
plugged into main PCB 
well.

Yes

No

Yes

Correct the connection.

Replace the main PCB.

Shut off the power supply and 

turn it on 5 seconds later. Is it 

still displaying the error code?

A14480

Summary of Contents for 38MFC

Page 1: ...for personal 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 p...

Page 2: ...1 60 3 208 230 1 60 Nominal Capacity 009 3 4 Ton 012 1 Ton 017 1 3 7 Ton HP 018 1 1 2 Ton AC 022 1 5 6 Tons Nominal Capacity 009 3 4 Ton 012 1 Ton 017 1 3 7 Ton HP 018 1 1 2 Ton AC 022 1 5 6 Tons 01 0...

Page 3: ...tion in Heating Mode S Condenser High Temp Protection in Cooling Mode S Ease Of Service And Maintenance Cleanable Filters S Diagnostics S Liquid Line Pressure Taps S Application Flexibility Condensate...

Page 4: ...e Flare Pipe Connection Size Liquid In OD 1 4 3 8 Pipe Connection Size Suction In OD 3 8 1 2 5 8 Condensate Drain OD ID in 0 65 0 63 Maximum Piping Length ft 65 98 Max Lift Fan Coil Above ft 25 30 Max...

Page 5: ...Outdoor Unit Charge lb 2 6 2 87 3 52 Refrigerant Lines Connection Type Flare Pipe Connection Size Liquid In OD 1 4 3 8 Pipe Connection Size Suction In OD 3 8 1 2 5 8 Condensate Drain OD ID in 0 65 0 6...

Page 6: ...D A14344 Model W in mm D in mm H in mm L1 in mm L2 in mm Operating Weight lb kg 9K 12K 30 7 780 9 8 250 21 2 540 21 6 549 10 9 276 70 5 32 0 17K HP 18K AC 29 9 760 11 2 285 23 2 590 20 9 530 11 4 290...

Page 7: ...0 13m min 6 5 0 13m min 1 8m CEILING FLOOR A07891 Fig 2 Indoor Unit Clearance CLEARANCES OUTDOOR A D B Air outlet Air inlet C E A07894 UNIT Minimum Value in mm A 24 610 B 24 610 C 80 2032 D 12 305 E 2...

Page 8: ...abnormally Optimum performance will be achieved during this operating temperature envelope A14466 Fig 4 System Operating Envelope ELECTRICAL DATA UNIT SIZE OPER VOLTAGE MAX MIN COMPRESSOR OUTDOOR FAN...

Page 9: ...m 300 volt rating and 2 64 inch thick insulation must be used CAUTION EQUIPMENT DAMAGE HAZARD Failure to follow this caution may result in equipment damage or improper operation S Wires should be size...

Page 10: ...interface CN4 Fan feedback interface CN5 Stepper motor interface P_1 Ground interface CN8 Room temperature sensor interface CN9 Pipe temperature sensor interface CN10A Display interface CN1 Electronic...

Page 11: ...line interface CN6 Indoor fan interface CN4 Fan feedback interface CN5 Stepper motor interface P_1 Ground interface CN8 Room temperature sensor interface CN9 Pipe temperature sensor interface CN10A Di...

Page 12: ...l CN16 Internal and external communication line interface CN6 Indoor fan interface CN4 Fan feedback interface CN5 Stepper motor interface P_1 Ground interface CN8 Room temperature sensor interface CN9...

Page 13: ...erface CN10A Display interface CN12 Compressor top temperature sensor optional CN7 Exhaust temperature sensor CN17 Outdoor temperature amp condenser pipe temperature sensor CN1 CN2 Four way valve cont...

Page 14: ...E FIELD PIPING FLARE CONNECTION A08104 Fig 10 Cooling CAPILLARY TUBE HEAT EXCHANGER CONDENSER HEAT EXCHANGER EVAPORATOR SERVICE VALVE LIQUID HTG LIQUID TWO PHASE CHECK VALVE HEATING MODEL ONLY REVERSI...

Page 15: ...cified below ADDITIONAL REFRIGERANT CHARGE Unit Size oz ft g m 9K 18K 0 16 15 22K 0 32 30 S Capillary tubes in outdoor unit are used as metering devices Long Line Applications 38MFC Units 1 No change...

Page 16: ...a nitrogen cylinder and regulator to system and open until system pressure is 2 psig 4 Close service valve and allow system to stand for 1 hr Dur ing this time dry nitrogen will be able to diffuse thr...

Page 17: ...of the compressor The compressor is heated when this is not operating The preheating function will deactivate If T4 is greater than 41_F 5_C or the compressor starts operating Zero Crossing Detection...

Page 18: ...unless interrupted by the cold blow algorithm This algorithm will not allow the fan to run if the indoor coil temperature drops below a preset value Defrost is controlled by the on board microprocesso...

Page 19: ...off off off 4 way valve Outdoor fan Indoor fan Indoor fan breeze 10s xx 10s 30s 10s Defrost Cycle no longer than 10 min xx 60s for 9k 12k models A14478 For 17K 22K models XX 60 for 17k model XX 90 for...

Page 20: ...In other conditions the compressor will have a 3 minutes delay at re start TROUBLESHOOTING This section provides the required flow charts to troubleshoot problems that may arise NOTE Information requi...

Page 21: ...ip Possible Causes Installation mistake Defective PCB Trouble shooting If the EEPROM chip is welded on main PCB replace the main PCB directly Otherwise check whether the EEPROM chip is plugged into ma...

Page 22: ...main PCB connected correctly Is the reactor connected well Power on Is the error extinguished Replace the indoor main PCB No Yes Measure the resistance of the reactor the one without capacitor If it...

Page 23: ...ng signal feedback for 4 minutes or the zero crossing signal time interval is abnormal Possible Causes Connection mistake Defective PCB Trouble shooting Check if the connections and power supply is no...

Page 24: ...he wires of fan motor Are all the connections good No Yes No Correct the connections No Yes Check whether the main PCB is normal through index 2 Yes Yes Check whether the fan motor is normal through i...

Page 25: ...the LED will display the failure Possible Causes Wiring mistake Defective sensor Defective PCB Trouble shooting Check the connections between temperature sensor and main PCB Are the connections good...

Page 26: ...continuity check Check if the IPM terminal resistance values are uniform Replace the IPM board or replace the main PCB if the IPM board and main PCB are integrated together No Check if the outdoor fan...

Page 27: ...it with power supply and try to restart the unit when power supply is good No Yes No Correct the connections or replace the wires Yes Power on and when the unit is in standby check if the voltage betw...

Page 28: ...eat exchanger of indoor and outdoor units Yes No Yes Yes Turn off the power supply and turn it on 10 minutes later Check if the unit can start normally No Check if the refrigerant charge volume is nor...

Page 29: ...s and connectors Yes No IPM continuity check Check if the IPM terminal resistance values are uniform Replace the IPM board or replace the main PCB if the IPM board and main PCB are integrated together...

Page 30: ...nce Value at 68_F 20_C Unit size 9K and 12K Unit size 17 18K Unit size 22K Blue Red 0 71 1 77 0 95 Blue Black Red Blue IPM continuity check Turn off the power let the large capacity electrolytic capac...

Page 31: ...70 59 0 82 0 78 0 81 0 86 1 01 MPA 75 63 0 86 0 83 0 87 0 91 1 07 MPA 80 67 0 93 0 89 0 91 0 96 1 12 Heating Chart _F _C IDT ODT 57 53 14 12 47 43 8 6 37 33 3 1 27 23 3 5 17 13 8 11 PSI 55 439 413 36...

Page 32: ...or 38 40MFC Q 012 3 A2 Control Board Input Output Values for 38 40MFC018 3 AC 38 40MFC017 3 HP A3 Control Board Input Output Values for 38 40MFC Q 022 3 A4 Temperature Sensor Values Temperature vs Res...

Page 33: ...009 1 40MFC Q 012 1 CONTROL BOARD INPUT or OUTPUT VALUE CN1 Output Pin5 6 12V Pin1 Pin4 Pulse waveform 0 12V CN14 Input Pin1 3 3V Pin2 0 3 3V Normal value about3 3V CN15 Input Pin1 0 1 8V Pin2 1 8V CN...

Page 34: ...ween the lines DC5V CONNECTOR 40MFC Q 012 3 CONTROL BOARD INPUT or OUTPUT VALUE CN14 Input Pin1 5V Pin2 0 5V Normal value about3 3V CN15 Input Pin1 5V Pin2 0 5V CN16 Input Pin3 Pin4 5V Pin1 Pin5 0 5V...

Page 35: ...ltage DC5V CN10A Maximum voltage between the lines DC5V CONNECTOR 40MFC018 3 AC 40MFQ017 3 HP CONTROL BOARD INPUT or OUTPUT VALUE CN101 Input Pin1 5V Pin2 0 5V Normal value about5V CN102 Input Pin1 5V...

Page 36: ...4 5V Pin1 Pin5 0 5V CN1 CN2 Output 230V High voltage CN11 CN22 Output Pin1 Pin5 0 230VHigh voltage CN10 CN13 Output 230V High voltage CN5 Output 230V High voltage CN6 Input 230V High voltage CN3 Input...

Page 37: ...078 117 243 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 80 176 1 17393 120 248 0 35982 1 34...

Page 38: ...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 5 39 102 30 36 79 174 7 086 119 246 2...

Page 39: ...oor unit EEPROM parameter error 1 l 1 times l P0 IPM malfunction or IGBT over strong current protection 6 l 2 times l P1 Over voltage or over low voltage protection 7 l 3 times l P2 High temperature p...

Page 40: ...r Corp S 7310 W Morris St S Indianapolis IN 46231 Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations Catalog No 38 40MF 1SM Replace...

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