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Service diagnosis

Domestic air conditioner

10.3.1 Thermistor or Related Abnormality

Indoor Display

ƾƵƵ

E1: Room temperature sensor failure

ƾƶƶ

E2: Heat-exchange sensor failure

Outdoor display LED1 flash 10 times

Defrost temperature sensor failure

LED1 flash 11 times

Suction temperature sensor failure

LED1 flash 12 times

Ambient temperature sensor failure

LED1 flash 13 times

Discharge temperature sensor failure

Method of

The temperatures detected by the thermistors are used to determine thermistor errors

Malfunction
Detection

Malfunction

When the thermistor input is more than 4.92V or less than 0.08V during compressor

Decision

operation.

Conditions

Note: The values vary slightly in some models

Supposed

Faulty connector connection

Causes

Faulty thermistor

Faulty PCB

Troubleshooting

* Caution Be sure to turn off power switch before connect or disconnect connector, or

else parts damage may be occurred.

Thermistor resistance check method:
Remove the connector of the thermistor on the PCB, and measure the resistance of thermistor using tester.The
relationship between normal temperature and resistance is shown in the value of indoor thermistor.

Thermistor resistance check

Is it normal?

Yes

Is it normal?

Check the connector connection.

Replace the thermistor

Replace the indoor unit PCB

Correct the connection

Содержание JS035-D2

Страница 1: ...ning s or caution s to advise non technic al individuals of potentia l dangers in attemptin g to servic e a product Product s powered by electricit y should be service d or repaire d only by experience d professiona l technicia ns Any attemp t to service or Repai r the produc t or product s dealt with in this servic e information by anyone else could result in seriou s injury or death WARNING Vers...

Страница 2: ...troduction 1 2 Features 7 3 Specifications 8 4 Sensors list 9 5 Piping diagrams 10 6 Printed circuit board connector wiring diagram 11 7 Functions and control 8 Dimensional drawings 9 Center of gravity 10 Service Diagnosis 11 Circuit diagrams 14 44 27 26 26 ...

Страница 3: ...Therefore be sure to observe all the safety caution items described below About the pictograms This symbol indicates an item for which caution must be exercised The pictogram shows the item to which attention must be paid This symbol indicates a prohibited action The prohibited item or action is shown inside or near the symbol This symbol indicates an action that must be taken or an instruction Th...

Страница 4: ...ressor at the welded section release the refrigerant gas completely at a well ventilated place first If there is a gas remaining inside the compressor the refrigerant gas or refrigerating machine oil discharges when the pipe is disconnected and it can cause injury If the refrigerant gas leaks during the repair work ventilate the area The refrigerant gas can generate toxic gases when it contacts fl...

Страница 5: ...ing the welder in an enclosed room can cause oxygen deficiency 1 2 2 Cautions Regarding Products after Repair Warning Be sure to use parts listed in the service parts list of the applicable model and appropriate tools to conduct repair work Never attempt to modify the equipment The use of inappropriate parts or tools can cause an electrical shock excessive heat generation or fire When relocating t...

Страница 6: ...generation or fire Do not damage or modify the power cable Damaged or modified power cable can cause an electrical shock or fire Placing heavy items on the power cable and heating or pulling the power cable can damage the cable Do not mix air or gas other than the specified refrigerant R 410A R22 in the refrigerant system If air enters the refrigerating system an excessively high pressure results ...

Страница 7: ...operly water can enter the room and wet the furniture and floor 1 2 3 Inspection after Repair Warning Check to make sure that the power cable plug is not dirty or loose then insert the plug into a power outlet all the way If the plug has dust or loose connection it can cause an electrical shock or fire If the power cable and lead wires have scratches or deteriorated be sure to replace them Damaged...

Страница 8: ...k Be sure to check the drainage of the indoor unit after the repair Faulty drainage can cause the water to enter the room and wet the furniture and floor 1 2 4 Using Icons Icons are used to attract the attention of the reader to specific information The meaning of each icon is described in the table below 1 2 5 Using Icons List Icon Type of Information Description Note Note A note provides informa...

Страница 9: ...ndoor noise can be adjusted to a more comfortable level when you set the sleep mode during night sleep Super match One outdoor unit can match two or more indoor unit DIY auto mode Adjust the last fixed operation mode automatically Turbo mode Quick cooling or heating Auto restart Automatic return to previous operation conditions after sudden power blackout 24 hours timer Use the timer function to s...

Страница 10: ... u s n o C r e w o P 1 4 6 4 W W P O C S R E E S 197 h W K n o i t p m u s n o c y g r e n e l a u n n A h m l a v o m e R e r u t s i o M TECHNICAL SPECIFICATIONS m m D W H s n o i s n e m i D m s n o i s n e m i D d e g a k c a P m D W H G K t h g i e W G K t h g i e w s s o r G r o l o C Sound level Sound pressure Hi Mid Lo Sound power high 1 6 10 1092 dB A White dB A 3 6 1 0 4 0 12280 3410 136...

Страница 11: ...ovable Washable Mildew Proof Temperature control Microcomputer Control 0010401715Y l e d o m r e l l o r t n o c e t o m e R Note the data are based on the conditions shown in the table below h t g n e l g n i p i P g n i t a e h g n i l o o c Indoor 27 DB 19 WB Outdoor 35 DB 24 WB Indoor 20 DB Outdoor 7 DB 6 WB 5m 4 Sensors list type Description Qty 1 r o f d e s u s t I m and pipe sensor o o e r...

Страница 12: ...Piping diagrams Domestic air conditioner 5 Piping diagrams 10 EEV EEV ...

Страница 13: ...play board 7 CON2 CON3 Connector for ion generator 8 CN23 red line Connector for communicate between the indoor board and the outdoor board 9 CN36 Connector for long range control 10 CN34 Connector for wifi Module 11 CON1 Connector for fresh air 12 CN2 Connector for wired controller 13 CN51 Connector for room card Note Other designations PCB 1 Indoor Control PCB 1 CN14 Connector for Forced operati...

Страница 14: ...Printed circuit board connector wiring diagram 12 Domestic air conditioner PCB 1 ...

Страница 15: ...1 The dotted parts are optional 2 The two pins of CN51 should be shorted when the second channel RC of SW2 is selected UP DOWN STEPMOTOR M FUSE1 SW1 CN7 T3 15A 250VAC TO OUTDOOR UNIT 1 N C 3 L 2 W B Y G GND CN14 CN6 CN10 LEFT STEPMOTOR CN11 CN5 R C0N1 BL L CN21 N S CN51 CN9 CN52 CN23 CN34 WIFI CN2 W IRED CONTROLLER FRESH AIR RIGHT STEPMOTOR ROOM CARD CN5 DC FAN MOTOR C0N2 C0N3 R W ION GENERATOR Y ...

Страница 16: ... Backlash B the compressor will be shutted the indoor fan will operate at the set speed and the mode signal will be sent to the outdoor system The system will keep the original status if Tr Ts Airflow speed control temperature difference 1ć Automatic When Tr Ts 3ć high speed When Ts 1ć Tr Ts 3ć medium speed When Tr Ts 1ć low speed When the sensor is off low speed When the airflow speed has no dela...

Страница 17: ...topped for more than 3 minutes and the outdoor system still operates the system will be changed into light speed mode When the airflow speed has no delay from the high to low switching the speed should be delayed for 3 minutes remain at high speed for 3 minutes before the next switch Manual When the sensor is off or Tr Ts 3 the manual operation can not be made obligatory automatic operation Airgat...

Страница 18: ...main at high speed for 3 minutes before the next switch Airgate location control the location for the airgate can be set according to your needs Coldair proof operation 1 The fan control functions as below Residue heat sending The indoor fan will send the residue heat at a low speed for 20 seconds If other conditions are satisfied when the compressor stops the indoor system will operate at a light...

Страница 19: ...eration 7 1 7 Air refreshing This model does not choose After receiving the signal from the remote control HV series the background light of the health logo is green HS series the health indicator will be lighted If the fan operates the Nano Aqua operates to realize the ions sending function If the indoor fan stops the Nano Aqua is turned off When the Nano Aqua is turned off if the air refreshing ...

Страница 20: ...etting If the fan is at the low speed before the dormant setting the speed will not change 7 1 10 Urgent on off input Press the urgency button the buzzer will ring The system will enter the automatic mode if you don t press the button for more than 5 seconds Under the system off mode if you press the urgency key for 5 to 10 seconds the system will start the test operation Under the system off mode...

Страница 21: ...oor system When the outdoor system operates if the indoor system operation differs from the outdoor system the abnormal operation malfunction will be reported 10s after the report the indoor system will be closed Outdoor system mode Indoor system mode conflicts cooling heating yes cooling cooling no cooling airflow no heating heating no heating airflow yes heating cooling yes 7 1 14 Malfunction li...

Страница 22: ...e indoor system thus can quit the single operation mode 7 1 17 Power cut compensation Entering condition Press dormant button 10 times within 7 second the buzzer will ring 4 times and the present system status will be stored into the EEPROM of the indoor system After entering the power cut compensation mode the processing of the indoor system should be as the followings Remote control urgency sign...

Страница 23: ... 7939 62 0907 1 68 1 55 15 70 0342 64 3023 58 9863 1 66 1 54 14 66 3463 61 0123 56 0565 1 64 1 52 13 62 8755 57 9110 53 2905 1 62 1 51 12 59 6076 54 9866 50 6781 1 60 1 49 11 56 5296 52 2278 48 2099 1 58 1 47 10 53 6294 49 6244 45 8771 1 56 1 46 9 50 8956 47 1666 43 6714 1 54 1 44 8 48 3178 44 8454 41 5851 1 51 1 42 7 45 8860 42 6525 39 6112 1 49 1 40 6 43 5912 40 5800 37 7429 1 47 1 39 5 41 4249 ...

Страница 24: ... 7475 10 4216 10 0964 0 75 0 75 25 10 3000 10 0000 9 7000 0 75 0 75 26 9 8975 9 5974 9 2980 0 76 0 76 27 9 5129 9 2132 8 9148 0 80 0 80 28 9 1454 8 8465 8 5496 0 84 0 83 29 8 7942 8 4964 8 2013 0 87 0 86 30 8 4583 8 1621 7 8691 0 91 0 90 31 8 1371 7 8428 7 5522 0 95 0 93 32 7 8299 7 5377 7 2498 0 98 0 97 33 7 5359 7 2461 6 9611 1 02 1 00 34 7 2546 6 9673 6 6854 1 06 1 04 35 6 9852 6 7008 6 4222 1 ...

Страница 25: ...5 2 29 68 2 2347 2 0695 1 9147 2 49 2 34 69 2 1652 2 0032 1 8516 2 54 2 38 70 2 0983 1 9393 1 7908 2 59 2 42 71 2 0337 1 8778 1 7324 2 63 2 46 72 1 9714 1 8186 1 6761 2 68 2 50 73 1 9113 1 7614 1 6219 2 73 2 54 74 1 8533 1 7064 1 5697 2 78 2 58 75 1 7974 1 6533 1 5194 2 83 2 63 76 1 7434 1 6021 1 4710 2 88 2 67 77 1 6913 1 5528 1 4243 2 92 2 71 78 1 6409 1 5051 1 3794 2 97 2 75 79 1 5923 1 4592 1 ...

Страница 26: ... 0 6484 4 29 3 88 104 0 7848 0 7036 0 6303 4 34 3 92 105 0 7641 0 6845 0 6127 4 40 3 97 106 0 7441 0 6661 0 5957 4 46 4 02 107 0 7247 0 6482 0 5792 4 51 4 07 108 0 7059 0 6308 0 5632 4 57 4 12 109 0 6877 0 6140 0 5478 4 63 4 16 110 0 6700 0 5977 0 5328 4 69 4 21 111 0 6528 0 5820 0 5183 4 74 4 26 112 0 6361 0 5667 0 5043 4 80 4 31 113 0 6200 0 5518 0 4907 4 86 4 36 114 0 6043 0 5374 0 4775 4 92 4 ...

Страница 27: ...Service diagnosis Domestic air conditioner 8 Dimensional drawings unit mm 9 Center of gravity unit mm 26 ...

Страница 28: ...s broken Operation sometimes stops Check the power supply A power failure of 2 to 10 cycles can stop air conditioner operation Equipment operates but does not cool or does not heat only for heat pump Check for faulty operation of the electronic expansion valve Set the units to cooling operation and compare the temperatures of the liquid side connection pipes of the connection section among rooms t...

Страница 29: ...on Page 37 F19 Trouble record 7 Compressor stall press instantaneous stop F27 Directly display 8 Compressor discarging temperature protection Page 38 F4 Directly display F8 Trouble record 9 Abnormal of DC motor Page 32 F21 Directly display 10 Abnormal of piping sensor Page 29 F7 Directly display 11 Suction temperature sensor failure Page 29 Outdoor Malfunction 12 Abnormal of outdoor ambient sensor...

Страница 30: ...or input is more than 4 92V or less than 0 08V during compressor Decision operation Conditions z Note The values vary slightly in some models Supposed Ŷ Faulty connector connection Causes Ŷ Faulty thermistor Ŷ Faulty PCB Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector or else parts damage may be occurred Thermistor resistance check method Remove the ...

Страница 31: ... Data detected by the EEPROM are used to determine MCU Malfunction Detection Malfunction When the data of EEPROM is error or the EEPROM is damaged Decision Conditions Supposed Ŷ Faulty EEPROM data Causes Ŷ Faulty EEPROM Ŷ Faulty PCB Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Replace the indoor or outdoor mainboard...

Страница 32: ...e to breaking of the fan motor lead wires Detection error due to faulty indoor unit PCB Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector or else parts damage may be occurred Check whether terminals on indoor pcb is well Pull out the term inals on the indoor mainboard and reinsert them Turn off power switch and pull out the fan motor Measure the resist...

Страница 33: ...ing condition and so on Malfunction Detection Malfunction when the data of EEPROM is error or the EEPROM is damaged Decision Conditions Supposed Ƶ DC fan motor protection dues to the DC fan motor faulty Causes Ƶ DC fan motor protection dues to faulty PCB Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred ...

Страница 34: ...e power Measure the resistances between black line 0V and red line 310V between black line 0V and white line 15V of the fan motor NO YES The resistances are greater than 40K NO YES The motor of the outdoor unit is damaged and needs replacing NO the resistances between 0V and 310V between 0V and 15V of the fan terminal of outdoor pcb are greater than 10M The module pcb is damaged replace it with a ...

Страница 35: ... to IPM protection due to over current Decision Ŷ The compressor faulty leads to IPM protection Conditions Ŷ circuit component of IPM is broken and led to IPM protection Supposed Ŷ IPM protection dues to the compressor faulty Causes Ŷ IPM protection dues to faulty PCB of IPM module Ŷ Compressor wiring disconnected Troubleshooting Caution Be sure to turn off power switch before connect or disconnec...

Страница 36: ...pply Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Electrify the machine again and turn it on with the remote controller If malfunctions are reported before or upon the compressor being started up IPM Module is damaged and needs replacing Repair the power supply The system may have been over or under charged with gas...

Страница 37: ...isconnected Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector or else parts damage may be occurred 1 Check whether Terminal CN23 and CN24 on the outdoor mainboard CN10 and CN11 on IPM module 2 Check whether the connected wire between IPM and outdoor Are they good Electrify the machine again and turn it on Check whether the voltage between 1 and 2 of Te...

Страница 38: ...Supply voltage not as specified Causes Ŷ the IPM module is broken Ŷ the outdoor PCB is broken Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector or else parts damage may be occurred Electrify the machine again and turn it on with the remote controller Check whether the compressor is started normally Is it ok Yes Maybe there is some disturbance NO No 230...

Страница 39: ... occurred Electrify the machine again and turn it on with the remote controller then measure the temperature at the exhaust temperature sensor of the compressor on the outdoor unit The temperature exceeds 110 ć shortly after the machine starts up 1 The cryogen may have been leaked during installation or there may be leakage in the piping system 2 There may be other causes to make the exhaust tempe...

Страница 40: ...ing Caution Be sure to turn off power switch before connect or disconnect connector or else parts damage may be occurred Restart the a c and it becomes normally If starting up normally but malfunction occurs again after a while The outdoor mainboard needs dehumidification The outdoor mainboard needs dedust Check whether the linking cable between the indoor and outdoor is well connected or whether ...

Страница 41: ...utdoor pcb is damaged replace it with a new one NO Measure the voltage Between 3 and 4 of IC9 on the Outdoor mainboard with a Multimete The voltage is a constant value of 0V DC to 5V DC The outdoor pcb is damaged replace it with a new one YES NO The outdoor pcb is well and then check the cable If the voltage is a constant value of 0V DC to 5V DC Or the voltage between Communication line red and N ...

Страница 42: ...mpressor Ƶ Faulty PCB Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Within 3 minutes after the machine is supplied with power and turned on with the remote controller check whether the compressor can start up 1 The wiring of compressor is incorrect or the connection is poor 2 The compressor is damaged At first the co...

Страница 43: ...Dirty heat exchanger Ƶ Faulty heat exchange sensor Ƶ Insufficient gas Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector or else parts damage may be occurred Electrify the machine again and turn it on with the remote controller check whether the wind temperature is below 65ć The malfunction is reported after the machine has run for some time 1 ǃ Check r...

Страница 44: ... 3 23 LINE RX 310V 3 5 SW 3 1 N 1 2 J3 5V 10K R30 10K R29 10K R102 10K R96 10K R8 10K R37 20K R103 10K R70 10K R72 10K R74 10K R75 10K R42 10K R109 2K R104 2K R69 2K R7 1K R86 1K R49 560Ω R33 100nF C2 100nF C20 100nF C28 100nF C18 100nF C11 1 2 3 4 TJC8 04 JP3 A0 1 A1 2 A2 3 GND 4 SDA 5 SCL 6 WP 7 VCC 8 M24C04 IC1 5V 5V RST E2 100uF 16V 1 2 JP1 TJC8 02 E11 100uF 25V 10K R10 10K R23 10K R54 10K R94...

Страница 45: ...6 FR106 1A 600V 500ns D20 FR106 1A 600V 500ns ZD202 1N4742A 12V 1W ZD003 1N4742A 12V 1W 15V 100mA 12V 900mA C002 104 630VDC E204 1000uF 25V 105 E8 22uF 50V 105 220 L 220 N S 1 BR 2 FB 4 V CC 5 NC 6 D ST 7 D ST 8 GND 3 IC9 A6059H E9 47uF 50V 105 N001 KTC8050 R011 10Ω 2512 310V 310V C004 10pF 1K V 12V L2 10uH 2 5A 5V C39 10pF LC1 BL M21PG600SN1D 100K R51 200K R71 22Ω R76 220K 1 R65 22K 1 R79 20K 1 R...

Страница 46: ......

Страница 47: ...l individuals of potential dangers in attempting to service a product Products powered by electricity should be serviced or repaired only by experienced professional technicians Any attempt to service or Repair the product or products dealt with in this service information by anyone else could result in serious injury or death WARNING Version V1 Date 2020 11 14 Wall Mounted Type DC Inverter SERIES...

Страница 48: ...Removal Procedure 1 Domestic Air Conditioner Removal of front panel front panel Remove the foam cushion 2 Loosen the screw ...

Страница 49: ...Removal Procedure 2 Domestic Air Conditioner Lift up the control box cover 3 Loosen the screw 4 Lift up the control box cover 5 ...

Страница 50: ...hen release the pivots on both sides of the unit to remove the front panel Removal of front panel Removal Procedure 3 Domestic Air Conditioner Pull the wires out of the control box 6 Remove the air filters 1 ...

Страница 51: ...three 6 Removal Procedure 4 Domestic Air Conditioner Remove the casing 1 2 3 ...

Страница 52: ...horizontal flap flap Removal Procedure 5 Domestic Air Conditioner and the stepper motor Loosen the screws and remove the stepper motor ...

Страница 53: ...2 Every blade go round and round then move it Removal Procedure 6 Domestic Air Conditioner horizontal louver and control box Loosen the screws ...

Страница 54: ...3 7 Domestic Air Conditioner Removal Procedure Loosen the hook and the service Cover Lift up the exchanger and remove it ...

Страница 55: ...Removal Procedure 8 Domestic Air Conditioner motor cover motor cover ...

Страница 56: ...Removal Procedure 9 Domestic Air Conditioner ...

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