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York YU2E18YJ6AMHO-Y Service Manual Download Page 50

50 

 

7.4.2.2

 

E2(Communication malfunction between indoor and outdoor units) diagnosis and solution. 

Error Code

 

E2

 

Malfunction 
conditions 

Indoor unit does not receive the feedback from outdoor unit 
during 120 seconds or outdoor unit does not receive the 
feedback from any one indoor unit during 180 seconds.  

Potential causes 

●

  Wiring mistake     

●

  Faulty Indoor or outdoor PCB  

Trouble shooting:

 

Summary of Contents for YU2E18YJ6AMHO-Y

Page 1: ...ew Released Service Manual Issue Date Apr 9 2019 Multi split inverter Form MYUSEJ6AMHO Y 190409 Multi split inverter R410a 60Hz HP SERIES YU2E18YJ6AMHO Y YU3E27YJ6AMHO Y YU4E36YJ6AMHO Y YU5E48YJ6AMHO...

Page 2: ...icing the indoor unit refrigeration circuit 13 4 7 Evacuation after servicing the outdoor unit refrigeration circuit 14 5 Electronic Function 16 5 1 Abbreviation 16 5 2 Electric Control Working Enviro...

Page 3: ...3 YU4E36YJ6AMHO Y WD30 metal plate 110 YU5E48YJ6AMHO Y WE30 metal plate 117...

Page 4: ...U3E27YJ6AM HO Y high wall 9 9 9 Duct 9 9 9 9 9 None 9 12 9 18 12 12 12 18 18 18 9 9 9 9 9 12 9 9 18 9 12 12 12 12 12 Multi DC Outdoor Unit Standard Combination Suggested Combination Limit YU4E36YJ6AMH...

Page 5: ...8 18 9 18 24 9 24 24 12 12 12 12 12 18 12 12 24 12 18 18 12 18 24 12 24 24 18 18 18 18 18 24 9 9 9 9 9 9 9 12 9 9 9 18 9 9 9 24 9 9 12 12 9 9 12 18 9 9 12 24 9 9 18 18 9 9 18 24 9 12 12 12 9 12 12 18...

Page 6: ...W D H W1 A B YU2E18YJ6AMHO Y mm 845 363 702 923 540 350 inch 33 3 14 3 27 6 36 0 21 3 13 8 YU3E27YJ6AMHO Y mm 946 410 810 1034 673 403 inch 37 2 16 5 31 9 40 6 26 5 15 9 YU4E36YJ6AMHO Y mm 946 410 810...

Page 7: ...7 H W A D W1 B Model Unit W D H W1 A B YU5E48YJ6AMHO Y mm 952 415 1333 1060 634 404 inch 37 5 16 3 52 5 41 7 25 0 15 9...

Page 8: ...XCHANGE CONDENSER Compressor 4 WAY VALVE COOLING HEATING T2 Evaporator temp sensor middle T1 Room temp sensor T3 Condenser temp sensor T5 Discharge temp sensor T4 Ambient temp sensor INDOOR OUTDOOR EX...

Page 9: ...ulator T2B A Evaporator temp sensor outlet T2B B T2B C 3 4 Refrigeration circuit drawing of YU4E36YJ6AMHO Y LIQUID VALVE A GAS VALVE A HEAT EXCHANGE EVAPORATOR HEAT EXCHANGE CONDENSER Compressor 4 WAY...

Page 10: ...Ambient temp sensor INDOOR OUTDOOR EXV A CAPILLARY A CHECK VALVE CAPILLARY TUBE EXV B CAPILLARY B LIQUID VALVE B GAS VALVE B EXV C CAPILLARY C LIQUID VALVE C GAS VALVE C EXV D CAPILLARY D LIQUID VALV...

Page 11: ...for all rooms 98 4 0 161x le ngth for all rooms 123 Caution Refrigerant pipe diameter is different according to indoor unit to be connected When using the extension pipe refer to the tables below When...

Page 12: ...ure Then remove the charge hose from the 3 way valve 8 Fully open the 2 wayand 3 way valves and securely tighten the cap on the 3 way valve 2 Adding refrigerant if the pipe length exceeds chargeless p...

Page 13: ...wrench to tighten the service port cap to a torque of 18N m 13 27 ft lbs Be sure to check for gas leaks 4 6 Procedure when servicing the indoor unit refrigeration circuit 1 Collecting the refrigerant...

Page 14: ...counterclockwise for 6 or 7seconds after the gas coming out then tighten the flare nut again Make sure the pressure display in the pressure indicator is a little higher than the atmosphere pressure Th...

Page 15: ...er in the cooling cycle however one time is not sufficient wait approximately 1 minute and then repeat the procedure 5 When the electronic scale displays the proper weight disconnect the charge hose f...

Page 16: ...t frequency If the temperature increase and T5 110 230 decrease the frequency to a lower level every 2 minutes till to F1 If T5 115 239 for 10 seconds the compressor stops and then restart untill T5 9...

Page 17: ...opI Heating stop protection current value 5 3 7 Indoor Outdoor Units Communication Protection If the indoor units do not receive the feedback signal from the outdoor units for 2 consecutive minutes th...

Page 18: ...all mounted Hi Wall series New Duct Cassette Console Floor Ceiling Total capacity Request Norm code HP 40 modify rate correction Cooling Mode T1 Ts 3 1 1 e c a 4 2 0 2 3 0 1 f d b Capacity area a b c...

Page 19: ...x T4FREHEATMAX1 25 24 Fmax T4FREHEATMAX2 22 21 Fmax T4FREHEATMAX3 19 18 Fmax T4FREHEATMAX4 17 16 Fmax T4FREHEATMAX5 15 14 Fmax T4FREHEATMAX6 12 11 Fmax T4FREHEATMAX7 6 5 Fmax T4FREHEATMAX8 1 0 Fmax T4...

Page 20: ...ine will turn to normal heating mode T3 TempQuitDefrost_ADD The defrosting time achieves 10min Turn to other modes or off 5 4 3 Outdoor Fan Control 5 4 3 1 Cooling Mode Under normal operating conditio...

Page 21: ...The adjustment range is 100 400p When the unit has been running for 3 minutes the outdoor receives indoor units capacity demand and T2B information and then calculates their average After comparing e...

Page 22: ...ting action In other modes a four way valve is closed When the unit is switched from heating to other modes the four way valve turns off after the compressor has been off for 2 consecutive minutes Fai...

Page 23: ...23 6 Wiring Diagrams 6 1 Wiring diagram of 1 drive 2 outdoor YU2E18YJ6AMHO Y...

Page 24: ...24 6 2 Wiring diagram of 1 drive 3 outdoor YU3E27YJ6AMHO Y...

Page 25: ...25 6 3 Wiring diagram of 1 drive 4 outdoor YU4E36YJ6AMHO Y...

Page 26: ...26 6 4 Wiring diagram of 1 drive 5 outdoor YU5E48YJ6AMHO Y...

Page 27: ...Do not forget to discharge the electricity in the capacitors The value of resistance is about 1500 ohm to 2000 ohm Electrolytic Capacitors HIGH VOLTAGE CAUTION Bulb 25 40W The voltage in P3 and P4 in...

Page 28: ...ensor T5 malfunction E4 5 times F4 Outdoor unit EEPROM parameter error E0 6 times F5 Outdoor fan speed malfunction E8 7 times F6 Indoor coil outlet pipe sensor Located on outdoor unit low pressure val...

Page 29: ...mode code Off 0 Fan only 1 Cooling 2 Heating 3 Forced cooling 4 Forced defrost A 3 Indoor unit A capacity The capacity unit is horse power If the indoor unit is not connected the digital display shows...

Page 30: ...T2E 32 Condenser pipe temperature T3 33 Outdoor ambient temperature T4 34 Compressor discharge temperature TP The display value is between 30 129 If the temperature is lower than 30 the digital displa...

Page 31: ...frequency and dF ach appears for 0 5s Compressor pre heating PH or alternative displays between running frequency and PH each appears for 0 5s Oil return process RO or alternative displays between run...

Page 32: ...Outdoor fan speed malfunction F5 F1 No A Indoor unit coil outlet temp sensor malfunction F2 No B Indoor unit coil outlet temp sensor malfunction F3 No C Indoor unit coil outlet temp sensor malfunctio...

Page 33: ...gnosis and solution Malfunction conditions Indoor or outdoor PCB main chip does not receive feedback from EEPROM chip Potential causes Installation mistake Faulty PCB Trouble shooting EEPROM a type of...

Page 34: ...etween indoor and outdoor units diagnosis and solution Malfunction conditions If indoor unit does not receive the feedback from outdoor unit during 120 seconds Potential causes Wiring mistake Faulty i...

Page 35: ...y remote controller Is all indoor unit display Turn off the all indoor units Is IPM power LED or operating LED lamp On Refer PIC2 Yes A Is all the wiring between terminal and Indoor PCB connect ok No...

Page 36: ...tage between 2 old L2 port and S port of outdoor unit The red pin of multimeter connects with 2 old L2 port while the black pin is for S port When AC is normal running the voltage will move alternatel...

Page 37: ...37 Operating Standby Pic 2 IPM for 2 zone 3 zone...

Page 38: ...38 PIC3 Main board LED when power on and unit standby Pic 2 IPM for5 zone Power Standby Operating...

Page 39: ...o crossing signal time interval is abnormal Potential causes Connection mistake Faulty PCB Trouble shooting Check if the connections and power supply is normal Correct the connections Turn on the unit...

Page 40: ...ution Malfunction conditions When indoor fan speed is too low 300RPM for a certain period of time the unit ceases operation and the LED displays a failure code Potential causes Wiring mistake Faulty f...

Page 41: ...nd need to be replaced 2 Indoor DC fan motor control chip is inside fan motor Power on and when the unit is in standby measure the voltage of pin1 pin3 pin4 pin3 in fan motor connector If the value of...

Page 42: ...the LED displays a failure Potential causes Wiring mistake Faulty sensor Faulty PCB Trouble shooting Check the connections between temperature sensor and PCB Are the connections good Correct the conne...

Page 43: ...ion conditions When the voltage signal that IPM send to compressor drive chip is abnormal the display LED will show P6 and AC will turn off Potential causes Wiring mistake IPM malfunction Faulty outdo...

Page 44: ...44...

Page 45: ...45 7 4 1 7 Over voltage or under voltage protection diagnosis and solution...

Page 46: ...ame with one of IPM module protection 7 4 1 9 Water level alarm malfunction diagnosis and solution Malfunction conditions If the sampling voltage is not 5V the LED will display the failure code Potent...

Page 47: ...in cooling mode or fan mode and indoor unit B is set to heating mode then A will change to off and B will work in heating mode Suppose Indoor unit A working in heating mode and indoor unit B is set t...

Page 48: ...48 7 4 1 11 High temperature protection of IPM board diagnosis and solution...

Page 49: ...ential causes Installation mistake Faulty PCB Trouble shooting Yes Replace the outdoor main PCB Replace the outdoor main PCB Power off then restart the unit 3 minutes later Power off then restart the...

Page 50: ...ution Error Code E2 Malfunction conditions Indoor unit does not receive the feedback from outdoor unit during 120 seconds or outdoor unit does not receive the feedback from any one indoor unit during...

Page 51: ...51...

Page 52: ...tage between 2 old L2 port and 3 port of outdoor unit The red pin of multimeter connects with 2 old L2 port while the black pin is for 3 port When AC is normal running the voltage will move alternatel...

Page 53: ...53 Operating Standby Pic 2 IPM board for 2 zone 3 zone...

Page 54: ...54 PIC3 Main board LED when power on and unit standby Pic 2 IPM for5 zone Power Standby Operating...

Page 55: ...55 PIC 4 Check point button press 1 time for check how many indoor units are connected...

Page 56: ...tion between IPM board and outdoor main control board diagnosis Error Code E3 Malfunction conditions PCB main chip does not receive feedback from IPM module during 60 seconds Potential causes Wiring m...

Page 57: ...o test the DC voltage between black pin and white pin of signal wire The normal value should be around 5V Use a multimeter to test the DC voltage between black pin and red pin of signal wire The norma...

Page 58: ...on diagnosis and solution F1 F2 F3 F4 F5 No A B C D E Indoor unit coil outlet temp sensor malfunction diagnosis and solution Error Code E4 F1 F2 F3 F4 F5 Malfunction conditions If the sampling voltage...

Page 59: ...ion diagnosis and solution Error Code E5 Malfunction conditions An abnormal voltage rise or drop is detected by checking the specified voltage detection circuit Potential causes Power supply problems...

Page 60: ...60 IPM board for 2 zone 3 zone...

Page 61: ...2 E3 N GND for 2 zone 3 zone Bridge rectifier for 2 zone 3 zone Bridge rectifier for 2 zone 3 zone IPM Module for 2 zone 3 zone Remark Measure the DC voltage between and port The normal value should b...

Page 62: ...62 IPM board for 4 zone...

Page 63: ...63 IPM board for 5 zone Bridge rectifier for 5 zone Remark Measure the DC voltage between and port The normal value should be 190V 250V IPM Module for 5 zone...

Page 64: ...e shooting PFC module protection Check whether the connecting line between main board and the PFC module IPM module is connected tightly Yes Check whether the voltage range of P N on IPM module is nor...

Page 65: ...65 Two ports of the inductance Inductance...

Page 66: ...ror Code E8 Malfunction conditions When outdoor fan speed keeps too low 300RPM or too high 2400RPM for certain time the unit will stop and the LED will display the failure Potential causes Wiring mist...

Page 67: ...in1 pin3 pin4 pin3 in fan motor connector If the value of the voltage is not in the range showing in below table the PCB must have problems and need to be replaced DC motor voltage input and output NO...

Page 68: ...68 Vs Vcc Vsp FG...

Page 69: ...n diagnosis and solution Error Code P1 Malfunction conditions If the sampling voltage is not 5V the LED will display the failure Potential causes Wiring mistake Faulty over load protector System block...

Page 70: ...70...

Page 71: ...71...

Page 72: ...n diagnosis and solution Error Code P2 Malfunction conditions If the sampling voltage is not 5V the LED will display the failure Potential causes Wiring mistake Faulty over load protector System block...

Page 73: ...73...

Page 74: ...74...

Page 75: ...sis and solution Error Code P3 Malfunction conditions If the outdoor current exceeds the current limit value the LED will display the failure Potential causes Wiring mistake Faulty over load protector...

Page 76: ...76...

Page 77: ...77...

Page 78: ...emperature protection of compressor discharge Check whether the compressor discharge temp is more than 115 C Check whether the connection is right between compressor discharge temp sensor and PCB acco...

Page 79: ...n Error Code P5 Malfunction conditions When outdoor pipe temperature is more than 65 C the unit will stop and unit runs again when outdoor pipe temperature is less than 52 C Potential causes Faulty co...

Page 80: ...Malfunction conditions When the voltage signal that IPM send to compressor drive chip is abnormal the display LED will show P6 and AC will turn off Potential causes Wiring mistake IPM malfunction Fau...

Page 81: ...main board check whether the system can work normally No Replace the compressor check whether the system can work normally Check whether the lines in E part box are connected tightly Yes Connect it ti...

Page 82: ...otection of compressor top IDU P2 ODU P0 Malfunction decision conditions If the sampling voltage is not 5V the LED will display the failure Supposed causes Faulty overload protector Wiring mistake Sys...

Page 83: ...it get warm Potential causes Faulty EXV Wire and piping connected in reverse Check of EXV please refer to part 6 in 9 5 Trouble Criterion Of Main Parts Automatic correction of wiring piping error Pres...

Page 84: ...re sensor from PCB measure the resistance value with a tester Temperature Sensors Room temp T1 sensor Indoor coil temp T2 sensor Outdoor coil temp T3 sensor Outdoor ambient temp T4 sensor Compressor d...

Page 85: ...6 0 40060 3 41 5878 37 5 87359 77 1 29078 117 0 38991 2 39 8239 38 5 62961 78 1 25423 118 0 37956 1 37 1988 39 5 39689 79 1 21330 119 0 36954 0 35 2024 40 5 17519 80 1 17393 120 0 35982 1 33 3269 41 4...

Page 86: ...5 8 084 115 2 422 4 222 8 36 34 32 76 7 82 116 2 357 3 211 4 37 32 94 77 7 566 117 2 294 2 200 7 38 31 62 78 7 321 118 2 233 1 190 5 39 30 36 79 7 086 119 2 174 0 180 9 40 29 15 80 6 859 120 2 117 1 1...

Page 87: ...25 26 27 28 29 30 31 32 33 34 35 74 76 78 80 82 84 86 88 90 92 94 96 98 2 Compressor check Measure the resistance value of each winding by using the tester Position Resistance Value ATM150D23UFZ ATF2...

Page 88: ...l resistance value Red Black Several M Red Black Several M P N U N U V V W W Red 4 AC Fan Motor Measure the resistance value of each winding by using the tester Position Resistance Value RPG20B RPG28H...

Page 89: ...8 20 Yellow Blue 76 8 20 19 8 20 252 8 20 88 8 20 150 8 20 374 3 8 20 138 8 20 5 4 way valve 1 Power on use a digital tester to measure the voltage when the unit operates in cooling it is 0V When the...

Page 90: ...90 6 EXV check Disconnect the connectors...

Page 91: ...91 Resistance to EXV coil Color of lead wire Normal Value Red Blue About 50 Red Yellow Brown Orange Brown White...

Page 92: ...92 Red Blue Red Yellow...

Page 93: ...93 Brown Orange...

Page 94: ...94 Brown White...

Page 95: ...CA30 metal plate No Part name Procedures Remarks 1 Fan assembly How to remove the fan assembly 1 Turn off the air conditioner and turn off the power breaker 2 Remove the screws of air outlet grille 4...

Page 96: ...the fan motor connector CN14 3p white from the IPM board 8 Remove the fan motor after unfastening four fixing screws 2 Panel plate How to remove the panel plate 1 Remove the screws of front panel and...

Page 97: ...e big handle 4 screws 3 Remove two screws of terminal board and seven screws of right rear panel and remove the right rear panel Screws of big handle Screws of terminal board Screws of right rear pane...

Page 98: ...onnector of the reactor 4 Unfasten the connector of the compressor 5 Disconnect following 3 pieces of connection wires and connectors between IPM and main control PCB CN1 5p white CN14 3p white CN4 re...

Page 99: ...xpansion valve A B 6p 6p red red CN25 CN23 S A S B 3p 3p white white Wires CN1 CN2 4 way valve blue blue CN5 CN6 Crankcase heating cable red red CN3 L IN red CN4 N IN black 8 Disconnect the grounding...

Page 100: ...s 4 Remove the sound insulation material and crankcase heating cable 5 Remove terminal cover of compressor and disconnect wires of crankcase electric heater and compressor from the terminal 6 Remove t...

Page 101: ...rews of reactor and remove the reactor 6 The 4 way valve How to remove the 4 way valve 1 Perform work of item 2 2 Extract refrigerant gas 3 Remove the electrical parts from item 3 4 Remove fixing scre...

Page 102: ...ures Remarks 1 Panel plate How to remove the panel plate 1 Turn off the air conditioner Turn off the power breaker 2 Remove the screws of big handle and remove the big handle 4 screws 3 Remove the scr...

Page 103: ...ove two screws of terminal board screws of water collector and fifteen screws of right rear panel and remove the right rear panel Screws of front panel Screws of front panel Screws of right front side...

Page 104: ...104 Screws of right rear panel Screws of terminal board...

Page 105: ...side panel and front panel from item 1 step 1 4 2 Remove the hex nut fixing the fan 3 Remove the fan 4 Remove the cover of electrical control box cover 5 Disconnect the fan motor connector CN14 5p whi...

Page 106: ...four screws fixing the IPM board 3 Unfasten the connector of the reactor 4 Unfasten the connector of the compressor 5 Disconnect following 3 pieces of connection wires and connectors between IPM and P...

Page 107: ...nsor 2p 2p 2p white CN18 CN19 CN22 Electronic expansion valve A B C 6p 6p 6p red red red CN25 CN23 CN20 S A S B S C 3p 3p 3p white white white Wires CN1 CN2 4 way valve blue blue CN5 CN6 Crankcase hea...

Page 108: ...igerant gas 4 Remove the sound insulation material and crankcase heating cable 5 Remove terminal cover of compressor and disconnect wires of compressor thermo and compressor from the terminal 6 Remove...

Page 109: ...of wires connected from the cover of inductance 5 Remove four screws of reactor and remove the reactor 6 The 4 way valve How to remove the 4 way valve 1 Perform work of item 1 2 2 Extract refrigerant...

Page 110: ...cedures Remarks 1 Panel plate How to remove the panel plate 1 Turn off the air conditioner Turn off the power breaker 2 Remove the screws of big handle and remove the big handle 4 screws 3 Remove the...

Page 111: ...ove two screws of terminal board screws of water collector and fifteen screws of right rear panel and remove the right rear panel Screws of front panel Screws of front panel Screws of right front side...

Page 112: ...assembly How to remove the fan assembly 1 Remove the top cover right front side panel and front panel from item 1 step 1 4 2 Remove the hex nut fixing the fan Screws of right rear panel Screws of term...

Page 113: ...ite from the driver board 6 Remove the fan motor after unfastening four fixing screws 3 Electrical parts How to remove the electrical parts 1 Perform work of item 1 2 2 Unfasten the connector of the r...

Page 114: ...ectors CN8 T3 T4 temperature sensor 2p 2p white CN33 Discharge temperature sensor 2p white CN13 T2B A B C D temperature sensor 2p 2p 2p 2p white CN18 CN17 CN21 CN20 Electronic expansion valve A B C D...

Page 115: ...d 4 Compressor How to remove the compressor 1 Perform work of item 1 2 3 2 Remove the electrical control box and partition plate 3 Extract refrigerant gas 4 Remove the sound insulation material and cr...

Page 116: ...of item 1 2 2 Extract refrigerant gas 3 Remove the electrical parts from item 3 4 Remove fixing screw of the coil and remove the coil 5 Detach the welded parts of 4 way valve and pipe 6 The expansion...

Page 117: ...ly How to remove the fan assembly 1 Turn off the air conditioner Turn off the power breaker 2 Remove the screws of air outlet grille 8 screws 3 Remove the hex nut fixing the fan 4 Remove the fan 5 Rem...

Page 118: ...crews of front side panel and remove the front side panel 1 screw 7 Disconnect the fan motor connectors FAN1 3p white and FAN2 3p white from DC motor driver board 8 Remove the fan motor after unfasten...

Page 119: ...terminal board and 15 screws of right rear panel and remove the right rear panel 3 Electrical parts How to remove the electrical parts 1 Perform work of item 1 step 5 6 and item 2 IPM board PCB board...

Page 120: ...tion wires and connectors between IPM and other parts CN2 yellow CN1 red CN6 black CN3 yellow U V W black CN9 10p white 4 Remove the fixing screws then remove the IPM board 5 Disconnect the connectors...

Page 121: ...S B S C S D S E 3p 3p 3p 3p 3p white CN10 High and low pressure switch 2p 2p white Wires CN17 CN18 4 way valve blue blue CN19 CN20 connected to crankcase heating cable black red CN24 CN25 Electric he...

Page 122: ...sound insulation material and crankcase heating cable 4 Remove terminal cover of compressor and disconnect wires of crankcase electric heater and compressor from the terminal 5 Remove the discharge p...

Page 123: ...from item 3 9 Remove fixing screw of the coil and remove the coil 10 Detach the welded parts of 4 way valve and pipe 6 The expansion valve How to remove the expansion valve 5 Perform work of item 1 2...

Page 124: ...2019 Johnson Controls Inc www johnsoncontrols com Johnson Controls reserve the right to change product features without prior notice Form MYHFEC7AMTOR3 190325...

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