Presentation is loading. Please wait.

Presentation is loading. Please wait.

TECHNICAL TRAINING INVERTER-Y IntroductionTROUBLESHOOTING.

Similar presentations


Presentation on theme: "TECHNICAL TRAINING INVERTER-Y IntroductionTROUBLESHOOTING."— Presentation transcript:

1 TECHNICAL TRAINING INVERTER-Y IntroductionTROUBLESHOOTING

2 CONTENTS  Error Indication  Error Diagnosis & Troubleshooting Guide  Tools, Equipment

3 ERROR INDICATION

4 From indoor units When any error occurs, indoor LED display will keep blinking – green light: The blinking pattern not indicate error details The error details have to retrieved from handset in error code form. LED blinks here

5 ERROR INDICATION Indoor : wireless handset -- G17 (McQuay) -- G18 (Acson) New -- GS01 (McQuay) New -- GS02 (Acson) : wired handset -- Netware 3 (standard for Ceiling Concealed)

6 ERROR INDICATION Using wireless handset G17/18 to retrieve error code: 1. For G17, hold down ON TIMER CANCEL or OFF TIMER CANCEL for 5 seconds. For G18, Hold down TIMER CANCEL for 5 seconds until “ ” indication flashes on the handset temperature display section. G18 G17 ON TIMER CANCEL OFF TIMER CANCEL

7 ERROR INDICATION 2. Then, press the same button repeatedly. A series of error code will appear until ID buzzer produces a long beep. The corresponding error code is indicated on the handset temperature display section. 3. ID unit buzzer will produce a long beep if the handset error code matched with unit error. 4. A short and two consecutive beeps is not the unit error. 5. The code display will cancel itself if the button is not pressed for 1 minute.

8 Remove battery from remote controller Replace battery again into remote controller Press Mode & ON/OFF buttons together The “ 00 “ will show at temperature section Press Mode button to 5:00 Press ON/OFF once Repeat the normal step for faulty diagnosis by remote controller step ON/OFF button Mode button OFF TIMER CANCEL button ON TIMER CANCEL button ERROR INDICATION How to retrieved last state error

9 ERROR INDICATION Using wireless handset GS01/02: 1. Hold down ON TIMER CANCEL or OFF TIMER CANCEL for 5 seconds until “ ” indication flashes on the handset temperature display section. ON TIMER CANCEL OFF TIMER CANCEL

10 ERROR INDICATION 2. Then, press the same button repeatedly. A series of error code will appear until ID buzzer produces a long beep. The corresponding error code is indicated on the handset temperature display section. 3. ID unit buzzer will produce a long beep if the handset error code matched with unit error. 4. A short and two consecutive beeps is not the unit error. 5. The code display will cancel itself if the button is not pressed for 1 minute.

11 ERROR INDICATION Using wired handset Netware 3:  The error will show at last 2 digits of the clock display.  Netware 3 also can retrieved last state memory by :  Press SLEEP & TIMER ACTIVE simultaneously and the error will be flashed on the last 2 digits of the clock display.

12 ERROR INDICATION No. ERROR CODEERROR DESCRIPTION 5LCY 10/15 DR 20/25 CR 5LCY 10/15 ER 5LCY 30/40/50/60 CR 5MSY 20/25/30 BR 100Normal√√√√ 2A1INDOOR PCB ERROR√√√√ 3A3DRAIN PUMP ABNORMAL√x√√ 4A5ANTIFREEZE PROTECTION√√x√ 5A6INDOOR FAN MOTOR ABNORMAL√√√√ 6A7AIR SWING MOTOR LOCK√x√√ 7A8ABNORMAL POWER SUPPLY VOLTAGExx√x 8C4 INDOOR HEAT EXCHANGER THERMISTOR SHORT/OPEN√√√√ 9C9INDOOR ROOM THERMISTOR SHORT/OPEN√√√√ Error code description for Y-series inverter : = will be explain in error diagnosis

13 ERROR INDICATION No. ERROR CODEERROR DESCRIPTION 5LCY 10/15 DR 20/25 CR 5LCY 10/15ER 5LCY 30/40/50/60 CR 5MSY 20/25/30 BR 10E1OUTDOOR PCB ERRORx√√√ 11E3HIGH PRESSURE PROTECTIONxx√x 12E4LOW PRESSURE PROTECTIONxx√x 13E5COMPRESSOR OVERLOAD√√√√ 14E6COMPRESSOR LOCK /START-UP ERROR√√x√ 15E7OUTDOOR FAN MOTOR LOCK√√√√ 16E8AC INPUT OVER CURRENT√√x√ 17E9EXV ERRORxx√x 18EA4 WAY VALVE ERRORx√x√ 19F3DISCHARGE PIPE OVERHEAT√√√√ Error code description for Y-series inverter :

14 ERROR INDICATION N o. ERROR CODEERROR DESCRIPTION 5LCY 10/15 DR 20/25 CR 5LCY 10/15 ER 5LCY 30/40/50/60 CR 5MSY20/25/30 BR 20F6HEAT EXCHANGER OVERHEAT√√x√ 21H0COMPRESSOR SENSOR SYSTEM ABNORMALx√x√ 22H3HIGH PRESSURE SWITCH ERRORxx√x 23H6POSITION SENSOR ABNORMAL ( compressor )√√x√ 24H8AC CURRENT SENSOR ERROR√√x√ 25H9OUTDOOR AIR THERMISTOR SHORT/OPEN√√√√ 26J1PRESSURE SENSOR ERRORxx√x 27J3 COMPRESSOR DISCHARGE PIPE THERMISTOR SHORT/OPEN/MISPLACED√√√√ 28J5SUCTION PIPE THERMISTOR SHORT/ OPENxx√X 29J6 OUTDOOR HEAT EXCHANGER THERMISTOR SHORT/ OPEN√√√√ Error code description for Y-series inverter :

15 ERROR INDICATION No. ERROR CODEERROR DESCRIPTION 5LCY 10/15 DR 20/25 CR 5LCY 10/15 ER 5LCY 30/40/50/6 0 CR 5MSY20/25/30 BR 30J7 SUBCOOLING HEAT EXCHANGER THERMISTOR SHORT/ OPENxx√x 31J8LIQUID PIPE THERMISTOR SHORT/ OPENxx√√ 32J9GAS PIPE THERMISTOR SHORT/ OPENxxx√ 33L1OUTDOOR PCB ERRORxx√x 34L3 ELECTRICAL BOX TEMPERATURE RISE ( compressor off )√√x√ 35L4HEAT SINK OVERHEAT ( compressor on )√√√√ 36L5IPM ERROR / IGBT ERROR ( output over current )√√√√ 37L8 ELECTRONIC THERMAL ( time lag-compressor signal disorder position)xx√x Error code description for Y-series inverter :

16 ERROR INDICATION No. ERROR CODEERROR DESCRIPTION 5LCY 10/15 DR 20/25 CR 5LCY 10/15 ER 5LCY 30/40/50/60 CR 5MSY20/25/30 BR 38P1OPEN PHASE OR VOLTAGE UNBALANCExx√x 39P4HEAT SINK THERMISTOR SHORT / OPEN√√√√ 40U0INSUFFICIENT GAS√√√√ 41U2DC VOLTAGE OUT OF RANGE√√√√ 42U4COMMUNICATION ERROR√√√√ 43UAINSTALLATION ERROR√√√√ 44UHANTIFREEZE PROTECTION IN OTHER ROOMxxx√ Error code description for Y-series inverter :

17 ERROR INDICATION From outdoor unit : When unit error happen, the error will show at outdoor display. 1) 5LCY-10/15DR, 20/25CR : 7 segment display 1) 5LCY-10/15DR, 20/25CR : 7 segment display 2) 5MSY-20/25/30BR : 5 LED light indicator 2) 5MSY-20/25/30BR : 5 LED light indicator 3) 5LCY-30/40/50/60ER : 2 LED light indicator 3) 5LCY-30/40/50/60ER : 2 LED light indicator 4) 5LCY-10/15ER : Nil 4) 5LCY-10/15ER : Nil

18 ERROR INDICATION 1. 5LCY-10/15 DR, 20/25CR: 7 segment display  The 7 segment display is located inside outdoor unit control panel beside the terminal block. Control panel cover have to remove before access to the 7 segment display. Overall photo for slx10,25 Overall photo for control box slx10,25

19 ERROR INDICATION  When there is no error, compressor running frequency is displayed.  When there is error, it flashes the error code as below: Normal operation Flashing error code

20 ERROR INDICATION  In addition, 7 segment also can be use to retrieve unit operating condition such as running current, DC voltage, ambient temperature, indoor air temperature, etc.  By pressing the tact switch, the 7 segment will start to flash from “00”. Press again, it will show “ 01” and subsequent running number shows the parameter number.  Then, the 7 segment will flashing again showing the parameter measurement.  When the 7 segment display is left untouched for 5 min, the display will light off (Dim). for 5 min, the display will light off (Dim).

21 ERROR INDICATION For measurement of 125, the 7 segment will display as 25 first follow by 01

22 ERROR INDICATION 2. 5MSY-20/25/30BR: 5 LED display at display board  LED A – flashing GREEN LED indicates normal equipment condition.  LED 1 - 4 – OFF condition of the red LED indicates normal equipment condition.  LED 1-4 -- blinking indicates error.

23 ERROR INDICATION Error code for 5MSY :

24 ERROR INDICATION 3. 5LCY-30/40/50/60ER: 2 LED light indicator  LED HAP – flashing GREEN LED indicates normal condition.  LED HAP – OFF condition indicates power supply abnormal or faulty outdoor PCB  LED H3P – OFF condition of the red LED indicates normal condition.  LED H3P – ON condition indicates protection devices activate

25 OTHERS  5LCY30/40/50/60 display PCB guide : 5LCY30 ER 5LCY 40/50/60 ER Display PCB

26 ERROR INDICATION 4. 5LCY-10/15ER: Nil For K-series inverter, the outdoor will not have error indicator, have to refer to indoor when error happen.

27 ERROR DIAGNOSIS

28 Error message : A1 Method of malfunction detection : Evaluation of zero- cross detection of power supply by indoor unit Malfunction decision condition : When there is no zero-cross detection in 10 seconds continuously. causes : 1.) Faulty indoor PCB 2.) Faulty connector connection at indoor ERROR A 1 : Indoor PCB error Troubleshooting flow : Turn off unit Any sign of loose or abnormal Connect correctly and operate again Replace indoor PCB and operate again YES NO Check indoor PCB connector conditions ( including PCB to terminal block and all PCB wire connector)

29 ERROR DIAGNOSIS Error message : A3 Method of malfunction detection : Evaluation of water level upper limit and float switch condition Malfunction decision condition : When water level reach upper limit and float switch turn off causes : 1.) Faulty drain pump or float switch 2.) Improper drain piping work or drain pipe blockage ERROR A 3 : Drain pump abnormal (for ceiling cassette unit) Troubleshooting flow : Turn off unit Any sign of loose or abnormal Connect correctly and operate again Restart back operation YES NO Check drain pump connector connect to indoor PCB

30 ERROR DIAGNOSIS ERROR A 3 : Drain pump abnormal (for ceiling cassette unit) Drain pump works ? Change drain pump Drainage system problem or blockage YES NO Drain water level abnormal high after sometimes ? YES NO Float switch connect to the PCB? NO Connect float switch YES Check float switch have continuity? YES NO Change float switch Change indoor PCB

31 ERROR DIAGNOSIS Error message : A5 Method of malfunction detection : Freeze-up protection control during cooling by detection of indoor heat exchanger thermistor. Malfunction decision condition : When indoor heat exchanger thermistor less than 0 ◦ C. causes : 1.) Indoor air filter, heat exchanger block. 2.) Indoor air short circuit. 3.) Indoor coil thermistor faulty, Indoor PCB faulty. ERROR A 5 : Antifreeze Protection Troubleshooting flow : Any air short circuit ? Provide sufficient air passage Check intake air filter YES NO Check indoor air flow

32 ERROR DIAGNOSIS Is it very dirty ? Clean the air filter Check indoor coil thermistor resistance YES NO YES ERROR A 5 : Antifreeze Protection Check the dust accumulate at indoor coil Is it very dirty ? Clean the indoor coil Does it conform to the thermistor accuracy table? YES Change indoor PCB NO Change indoor coil thermistor # Refer to thermistor resistance table

33 ERROR DIAGNOSIS Error message : A6 Method of malfunction detection : Rotation speed detected by the indoor PCB during fan motor running is used to determine this error. Malfunction decision condition : When the detected motor rotation speed does not reach the target rotation speed by the program causes : 1.) Indoor fan motor winding short, or the motor lead wire broken 2.)Indoor PCB faulty. ERROR A 6 : Indoor fan motor abnormal Troubleshooting flow :

34 ERROR DIAGNOSIS ERROR A 6 : Indoor fan motor abnormal Does it rotate ? Turn off power supply and rotate fan by hand YES NO Change fan motor Turn ON and run fan Does it rotate ? YES NO Change fan motor Change PCB

35 OTHERS :  Inverter–Y series fan motor: 5LCY 10/15 DR 5LCY 20/25 CR 5LCY 10/15 ER 5MSY 20/25/30 BR 5LCY 30/40/50/ 60 ER OutdoorAC DC IndoorWMACDC ------------- CC,CK, CM AC ---------------------

36 ERROR DIAGNOSIS Error message : A8 Method of malfunction detection : Checking of input voltage Malfunction decision condition : When the voltage detected out of range of ± 10 % of 240 V. causes : 1.) Power supply problem or blackout. 2.) Wiring problem or Indoor PCB faulty. ERROR A 8 : Abnormal power supply voltage Troubleshooting flow : Any problem as describe above? Possible of external factor such as blackout YES NO Check the condition of power source : 1.) voltage is 220V-240V± 10% 2.) Check there is power open phase or wiring problem 3.) Check power supplier fluctuation within 6V Correct the supply problem

37 ERROR DIAGNOSIS Error message : C4, C9 Method of malfunction detection : Temperature detected by the thermistor Malfunction decision condition : When the thermistor input is > 4.96V or <0.04V during compressor operation. causes : 1.) Thermistor, connector faulty. 2.) Indoor PCB faulty. ERROR C4, C9 : INDOOR HEAT EXCHANGER, ROOM THERMISTOR SHORT/OPEN Troubleshooting flow : Normal ? Check thermistor resistance value No Yes Check the thermistor connector condition Correct the problem # Refer thermistor resistance table Normal ? No Replace thermistor Replace PCB

38 ERROR DIAGNOSIS  ( 5WMY10/15 JR ) Location of indoor coil thermistor: ERROR C4, C9 Indoor heat exchanger thermistor CN COIL

39  For room thermistor : WMY-J series, K-series = Chips type thermistor mount to the PCB. other indoor - copper sensor attached to return air location RTH201 Unit design with air opening at the front panel to allow sufficient space for air flow & measurement Air intake gap for room temperature sensing ERROR C4, C9 Indoor room thermistor ERROR DIAGNOSIS

40 Error message : E3 Method of malfunction detection : Protection device check high pressure switch continuity Malfunction decision condition : When the high pressure switch is turn off at 4MPa. ( 580 psi ), turn on at 3 MPa ( 435 psi ) causes : 1.) faulty high pressure switch, connector or wire harness 2.) Indoor filter, outdoor coil dirty. 3.) Outdoor fan not running, unit overcharge, stop valve is closed. ERROR E3 : High pressure protection (for 5LCY 30-60 ER) Troubleshooting flow : Stop valve open? No Yes Check the installation condition Open the stop valve High pressure switch connect to outdoor PCB? No Connect correctly Turn off unit. Wait for compressor stop 10 minutes

41 ERROR DIAGNOSIS ERROR E3 : High pressure protection (for 5LCY30-60 ER) Have continuity for high pressure switch? No Yes Replace high pressure switch Check the abnormal unit high pressure condition Have abnormal condition? Correct the abnormal condition No Yes Replace outdoor PCB # Refer how to check high pressure condition

42  Outdoor high pressure condition check :

43 Where a wall or other obstacle is in the path of outdoor unit’s intake or exhaust airflow Follow this installation guidelines to avoid air short circuit Installation condition : 5LCY10/15 DR ERROR DIAGNOSIS

44 Error message : E4 Method of malfunction detection : Protection device check low pressure switch continuity Malfunction decision condition : When the pressure detected is < 0.12 MPa ( 17 psi )for continues 5 minutes. causes : 1.) faulty low pressure switch, faulty outdoor PCB 2.) Stop valve closed, unit leakage or refrigerant not enough. 3.) Abnormal refrigerant piping system,faulty EXV ERROR E4 : Low pressure protection (for 5LCY30-60 ER) Troubleshooting flow : Stop valve open? No Yes Open the stop valve Low pressure switch connect to outdoor PCB? No Connect correctly Measure the voltage between low pressure switch Yes # Refer how to check low pressure voltage

45 ERROR DIAGNOSIS ERROR E4 : Low pressure protection (for 5LCY30-60 ER) Relation between Voltage and pressure follow the graph? No Yes Change the low pressure switch Correct refrigerant system ( gas shortage, leakage or piping block ) Yes # Refer how to check low pressure condition Is the refrigerant pressure abnormally low? No Change the Outdoor PCB

46  Outdoor low pressure condition check :

47  Outdoor pressure sensor condition check : For 5LCY30-60 ER pressure switch: PH = detected pressure ( MPa ) V = Output Dc voltage PH = 1.38 V -0.69

48 ERROR DIAGNOSIS Error message : E5 Method of malfunction detection : Detected by compressor overload Malfunction decision condition : When compressor overload activate twice. If active once, will be reset if not happen in following 60 mins. causes : 1.) Stop valve, EXV defective 2.) 4wv, outdoor PCB defective 3.) Refrigerant shortage, water mixed in the piping ERROR E5 : Compressor overload Troubleshooting flow : Turn off unit. Disconnect Compressor wire hardness ( U,V,W ) Resistance normal? No Change compressor Check compressor winding resistance Yes # Refer compressor resistance table

49 ERROR DIAGNOSIS ERROR E5 : Compressor overload Compressor stop without running? No Change outdoor PCB Connect back wire and turn on unit Yes Compressor run for sometimes. Check EXV, stop valve, refrigerant level, 4WV and water in the piping, installation condition

50  Inverter –Y series Compressor spec: 5LCY 10/15 DR5LCY 20/25 CR5LCY 10/15 ER5MSY 20 BR5MSY25/30 BR5LCY 30 ER5LCY 40/50/60 ER Compressor type Rotary (swing) Rotary (swing) Rotary (swing) Rotary (swing) rotary (swing) scroll Compressor manufacturer PanasonicDaikin Compressor model 5RS102XBJ012YC32GXD1YC23AEXDA2YC36BXD2YC45BXD2YC63DXDJT-100G-VD Compressor winding resistance ( U,V,W ) -Ω 0.8581.181.7640.8280.7870.31 motor6 pole brushless motor 4 pole brushless motor 6 pole brushless motor 4 pole brushless motor General guide :1) Resistance of compressor winding < 10 Ω consider Ok 2) All 3 terminal resistance value must be same. ERROR DIAGNOSIS

51 Other :  Inverter –Y series Compressor spec : 4 poles motor 6 poles motor

52 ERROR DIAGNOSIS Error message : F3 Method of malfunction detection : Compressor discharge thermistor is checked with discharge temperature control. Malfunction decision condition : When compressor discharge temperature is at abnormal high level or rise suddenly. E.g. : 110 -120 degree C varies by model. 100-110 degree C when compressor frequency low. causes : 1. Faulty discharge thermistor, compressor, Outdoor PCB 2. Refrigerant shortage ERROR F3 : Discharge pipe overheat Troubleshooting flow : Any wire damage, not insert to connector? No Correct wiring Yes Check discharge thermistor condition Check discharge thermistor resistance value # Refer resistance table : for discharge thermistor, different spec.

53 ERROR DIAGNOSIS ERROR F3 : Discharge pipe overheat Resistance value Normal? Yes Change discharge thermistor No Check refrigerant level, compressor, EXV & stop valve.

54 ERROR DIAGNOSIS Error message : F6 Method of malfunction detection : Detect heat exchanger ( outdoor coil ) temperature during cooling mode. Malfunction decision condition : Activate when outdoor coil temperature exceed 65 º C. Error reset when temperature drop to 50º C. causes : 1.) Faulty outdoor coil thermistor, faulty outdoor PCB 2.) Installation space not enough, hot air short circuit, fan motor not running, coil dirty ERROR F6 : Heat exchanger overheat Troubleshooting flow : Any abnormal? No Change outdoor location, clean outdoor coil. Yes Check outdoor installation condition Check outdoor fan motor

55 ERROR DIAGNOSIS ERROR F6 : Heat exchanger overheat Resistance normal? Yes Change fan motor No Check outdoor coil thermistor resistance Change outdoor PCB Fan motor running smoothly? No Change thermistor Yes # Refer resistance table

56 ERROR DIAGNOSIS Error message : F6 Method of malfunction detection : Detect the compressor current and voltage before compressor start. Malfunction decision condition : Detected DC voltage is too low or too high. No current detected when compressor start causes : 1.) Outdoor PCB, compressor problem 2.) Compressor wrong wiring, reactor not connected. ERROR H0 : Compressor sensor system abnormal Troubleshooting flow : Any abnormal? No Connect back reactor Yes Check reactor connection Check reactor resistance

57 ERROR DIAGNOSIS ERROR H0 : Compressor sensor system abnormal <10 Ω ? Yes Change reactor No Check reactor resistance # disconnect the reactor wire and measure resistance between terminal Check compressor resistance <10 Ω ? Change compressor Yes Change outdoor PCB No

58 ERROR DIAGNOSIS Error message : H9,J3,J5,J6,J7,J8,J9,P4 Method of malfunction detection : Detect the temperature detected by the thermistor. Malfunction decision condition : When thermistor is disconnected or short circuit during operation. J3 is judged when compressor discharge thermistor temperature is smaller compare to the condenser thermistor temperature. causes : 1.) Thermistor, connector problem 2.) Outdoor PCB problem ERROR H9, J3,J5,J6,J7,J8,J9,P4 : Outdoor Thermistor related abnormal Troubleshooting flow : Thermistor disconnected or loose? No Connect thermistor back Yes Check connector for the thermistor with error Check thermistor resistance # Refer thermistor spec and the table.

59 ERROR DIAGNOSIS ERROR H9, J3,J5,J6,J7,J8,J9,P4 : Outdoor Thermistor related abnormal Resistance value normal? No Change thermistor Yes Change outdoor PCB H9 :Outdoor air thermistor J3 : Compressor discharge thermistor J5 : Suction pipe thermistor (for 5LCY30-60 model) J6 : Outdoor heat exchanger thermistor J7 : Sub-cool heat exchanger thermistor (for 5LCY 30-60 model) J8 : Liquid pipe thermistor (for 5LCY30-60, 5MSY20-30) J9 : Gas pipe thermistor (for 5MSY20-30) P4 : Heat sink thermistor (for 5MSY20-30, 5LCY10-15ER, 5LCY10-15DR)

60  Inverter –Y series Thermistor spec : 5LCY 10/15 DR 5LCY 20/25 CR 5LCY 10/15 ER 5LCY 30/40/50/ 60 ER 5MSY 20/25/30 BR IndoorWM10K 20K------- ------ CC,CK, CM 10K ------------- Outdoor10K 20K Except for discharge pipe thermistor =230K (Refer 20k  table) 20K ERROR DIAGNOSIS

61  How to check thermistor resistance Use multi meter to check the thermistor resistance value.

62 At 25  C Resistance value: 10 k   Inverter–Y series Thermistor spec : (10 KΩ)

63 At 25  C Resistance value: 20 k   Inverter–Y series Thermistor spec : (20 KΩ)

64 Discharge thermistor spec for 5LCY 30/40/50/60  Inverter–Y series Thermistor spec : (discharge thermistor)

65  For Outdoor 5LCY10/15 DR : All thermistor ( discharge, air, coil ) share a same connector and connect to PCB Outdoor air thermistor with PVC protection sleeve Outdoor discharge, heat exchanger Thermistor : copper type ERROR DIAGNOSIS

66 Error message : L3 Method of malfunction detection : Detect the temperature of heat sink when compressor off. Malfunction decision condition : Heat sink temperature >80 º C( MSY ), > 93 º C ( K-series ) when compressor off. Error reset when temperature drop < 70 º C. causes : 1.) Outdoor fan, PCB problem 2.) Heat sink thermistor, connector problem ERROR L3 : Electrical Box temperature rise (compressor off)

67 ERROR DIAGNOSIS ERROR L3 : Electrical Box temperature rise (compressor off) Troubleshooting flow : Error again ? No Check outdoor fan Yes Turn off the unit and turn on back after 20 mins Check heat sink thermistor resistance # Refer thermistor spec and the table. Outdoor fan functioning? No Yes Change outdoor fan motor Heat sink dirty? Yes Clean the heat sink No Check installation condition Heat sink temperature > 80 ºC ? Change thermistor No Yes Resistance normal? No Change outdoor PCB Change heat sink or check outdoor fan condition

68 ERROR DIAGNOSIS Error message : L4 Method of malfunction detection : Detect the temperature of heat sink when compressor on. Malfunction decision condition : Heat sink temperature >103º C( MSY ), > 93 º C ( K-series ) when compressor on. Error clear when not happen in the following 60 mins. causes : 1.) Outdoor fan, PCB problem 2.) Heat sink thermistor, connector problem ERROR L4 : Heat sink overheat (compressor on)

69 ERROR DIAGNOSIS ERROR L4 : Heat sink overheat (compressor on) Troubleshooting flow : Error again ? No Check outdoor fan Yes Turn off the unit and turn on back after 20 mins Check heat sink thermistor resistance # Refer thermistor spec and the table. Outdoor fan functioning? No Yes Change outdoor fan motor Heat sink dirty? Yes Clean the heat sink No Check installation condition Heat sink temperature > 93 ºC ? Change thermistor No Yes Resistance normal? No Change outdoor PCB Change heat sink or check outdoor fan condition # Make sure condition of silicon grease apply to IPM, and diode bridge is good. Yes

70  Application of silicon grease  Application of silicon grease to IPM board and diode bridge :

71 Heat sink IPM board  Bad condition of silicon grease can cause L4 ( heat sink overheat ) L4 ( heat sink overheat ) L5 ( IPM error ) L5 ( IPM error ) Silicon grease ERROR DIAGNOSIS

72  For Outdoor 5LCY10/15 DR : The heat sink thermistor is screw and connect the PCB ( port : CN HTSK ) ERROR DIAGNOSIS

73 Error message : L5 Method of malfunction detection : Detect the output current that flows into IPM board inverter DC section. Malfunction decision condition : When over current has been detected by IPM and feedback MCU. A position signal, speed signal error happen during compressor running. causes : 1.) Over current due to IPM board, internal wiring, wire connector loose, PCB problem 2.) Over current due to stop valve close, compressor failure, abnormal supply voltage. 3.) Over current due to silicon grease not apply to the IPM board contact point properly. ERROR L5 : IPM (inverter power module) / IGBT error (output over current) Turn off the unit and turn on back after 20 mins Stop valve fully open? No Open stop valve Yes Error again ? Yes No Continue monitor for supply voltage, discharge, suction pressure, compressor overload, Check for silicon grease at IPM condition

74 ERROR DIAGNOSIS ERROR L5 : IPM / IGBT error (output over current) Turn off the unit and disconnect compressor U,V,W wire No Check compressor winding resistance Yes Resistance normal Change compressor Change the Outdoor PCB

75 ERROR DIAGNOSIS Error message : L5 Method of malfunction detection : Checking compressor running frequency and input current. Checking compressor discharge temperature versus target discharge temperature and EXV opening. Malfunction decision condition : When input current is smaller compare to target current. When compressor discharge temperature is higher compare to target discharge temperature and the EXV opening is high( >450 pulse ) causes : 1.) Refrigerant shortage, unit leakage 2.)Refrigerant piping system block, 3.) EXV defective, thermistor disconnected, stop valve closed ERROR U0 : Insufficient gas

76 ERROR DIAGNOSIS ERROR U0 : Insufficient gas Check for EXV function Any thermistor disconnected? No Connect back Yes Stop valve closed? Yes No Change EXV Yes Open stop valve EXV functioning? No Check for refrigerant level # How to check refrigerant level

77 ERROR DIAGNOSIS ERROR U0 : Insufficient gas Change thermistor, outdoor PCB or compressor No Check for leakage Yes Any leakage? No Add refrigerant Yes Refrigerant level normal? Repair the leak point

78  How to check refrigerant level - To set unit run in force cooling (unit will run at rated compressor fixed frequency). - Connect pressure gauge outdoor suction service valve and measure the suction pressure. - Ideal suction pressure level : 125-150 psi (depends on the outdoor ambient temperature).

79 - Press and hold on the ID ON/OFF button for 5-9 s when unit is in standby mode. - Set to high fan mode and temperature at 16 °C using remote controller Press & hold ERROR DIAGNOSIS

80 Error message : U4 Method of malfunction detection : Data received from the outdoor unit in indoor unit -outdoor unit signal transmission is checked whether it is normal. Malfunction decision condition : When the data send from the outdoor cannot be received in ( XX second ) or the data content is abnormal. causes : 1.) Faulty indoor, outdoor PCB 2.)Indoor-outdoor signal wire line wiring error ( loose or broken ). 3.) External noise, power supply waveform disturbance ERROR U4 : Communication error (between indoor and outdoor) Check indoor-outdoor wiring connection Any wiring problem? No Yes Correct the wiring Check outdoor unit PCB “ status LED “ #Refer wiring check

81 ERROR DIAGNOSIS No LED light on? ERROR U4 : Communication error (between indoor and outdoor) Change outdoor PCB Yes Check voltage of indoor-outdoor connection between No.1-No.3 and No.2-No.3 Voltage =0? Yes Replace connection between indoor and outdoor No Check power supply waveform Any disturbance? No Yes Find the source of power disturbance and correct it Replace indoor unit PCB, external noise ( interference ) #Refer supply waveform check

82  Maximum communication wire length: 50 meters  Make sure the recommended type of wire is used  Check for loose connection  Wiring – How to check communication wire :

83  Power supply disturbance check  Using power analyzer to check the supply voltage

84 ERROR DIAGNOSIS Error message : UA Method of malfunction detection : Detected different type of transmission signal ( for different model ) Malfunction decision condition : When detected different coupling of indoor-outdoor unit. causes : 1.) Outdoor and indoor unit not match ( wrong model, horsepower, ) 2.)Wrong indoor-outdoor PCB. 3.) External noise, power supply waveform disturbance ERROR UA : Installation error 1.X-series inverter unit can not couple with Y-series inverter 2.K-series inverter unit can not couple with X, Y series inverter and only available in 1.0,1.5 Hose power.

85 5WMY10/15 JR 5LCY10/15 DR ERROR DIAGNOSIS ERROR UA : Installation error

86 TOOLS & EQUIPMENT

87  Digital clamp meter  Digital multi-meter : to check resistance, voltage, current, wire continuity AC CURRENT RESISTANT AC VOLTAGE

88 TOOLS & EQUIPMENT  Manifold (pressure) gauge and hose Gauge : High side :800 psig Low side :250 psig for low-side (500 low-side retard) Hose : rated 800 psig

89 TOOLS & EQUIPMENT  Refrigerant tank  Weighing machine  Thermocouple  Test pen

90 TOOLS & EQUIPMENT  Replacement parts : Indoor/outdoor PCB 5LCY10/15DR –Outdoor PCB 5WMY10/15JR –indoor PCB

91 TOOLS & EQUIPMENT  Brazing equipment  Vacuum pump & vacuum meter.

92 THANK YOU & Q & A


Download ppt "TECHNICAL TRAINING INVERTER-Y IntroductionTROUBLESHOOTING."

Similar presentations


Ads by Google