Haier 70T Series, Service Manual

Page 1: ...angers 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 2018 Qingdao Haier Air Condi tioner Genera l corp Ltd All rights reserved Un...

Page 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 ...

Page 3: ...del name explanation A S 6 8 T E D H R A Indoor unit Type of indoor unit S wall mounted Nominal cooling capacity 24000BTU h Platform of indoor units T T platform 60T Platform Version number Indoor units DC inverter Apply toT1 220 240V50HZ 1ph C L Self Cleaning ...

Page 4: ...efore disassembling the equipment for a repair Working on the equipment that is connected to a power supply can cause an electrical shook If it is necessary to supply power to the equipment to conduct the repair or inspecting the circuits do not touch any electrically charged sections of the equipment If the refrigerant gas discharges during the repair work do not touch the discharging refrigerant...

Page 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...

Page 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 ...

Page 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...

Page 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...

Page 9: ...r 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 set on or off or from on to off or from off to on Intergrative valve cover The valve cover is Intergrative 2 way piping design...

Page 10: ...o C r e w o P 4 0 7 1 W W P O C S R E E S 350 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 m P 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 2 8 10 1963 dB A White dB A 7 0 2 2 8 5 23880 7500 29000 8 1 ...

Page 11: ...ovable Washable Mildew Proof Temperature control Microcomputer Control 0010401715DG 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 ...

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

Page 13: ...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 operation ON OFF swi...

Page 14: ...Printed circuit board connector wiring diagram 12 Domestic air conditioner PCB 1 CN2 CN9 CN21 CN6 CN23 CN1 CON3 CN5 CN11 CN7 CN14 CN17 CN51 CN34 CN11 CON1 CON2 CN9 ...

Page 15: ... 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 G CN11 DISPL...

Page 16: ...e 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 del...

Page 17: ...ped 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 Airgate l...

Page 18: ...gh 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 speed The...

Page 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 ...

Page 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...

Page 21: ...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 list resume Nothing is presented if there is no code list The malfunction dis...

Page 22: ...ion 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 signal operate according to the remote control and the urgent conditions the present status will be store...

Page 23: ... 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 38 6207 35 9739 1 45 1 37 ...

Page 24: ...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 10 1 07 36 6 7273 6 4459 6 1707 1 13 1 11 37 6 4803 6 2021 5 9304 1 17 1 14 38 6 2437 5 9687 5 7007 1 21 ...

Page 25: ...9 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 3360 3 02 2 80 80 1 5454 1 4149 1 2942 3 07 2 84 81 1 5000 1 3721 1 2540 3 12 2 88 82 1 4562 1 3308 1 ...

Page 26: ...2 105 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 41 115 0 5891 0 5235 0 4648 4 98 4 45 116 0 5743 0 ...

Page 27: ...Seivice diagnosis Domestic air conditioner 8 Dimensional unit mm 9 Center of gravity unit mm 26 302 8 513 834 ...

Page 28: ...CB is 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 roo...

Page 29: ... Outdoor EEPROM error Page 30 F1 ƶ ƾ ƾ 2 The protection of IPM Page 34 F22 ƾ ƾ Ƶ 3 Overcurrent protection of AC electricity for the outdoor model Page 35 F3 Ƶ ƾ Ƶ 4 Communication fault between the IPM and outdoor PCB Page 36 F19 Ƶ ƾ ƶ 6 Power voltage is too high or low Page 37 F4 Ƶ ƾ Ƶ 8 Overheat protection for Discharge temperature Page 38 F21 ƶ ƶ ƾ 10 Defrost temperature sensor failure Page 29 F...

Page 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 ...

Page 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...

Page 32: ...r 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 Electrify the machine again and turn it on in the cooling operation Measure voltage between the positions 1and 3 of Terminal CN5 on the indoor PCB the voltage is about 90 220vac check wheth...

Page 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 ...

Page 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 ...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 40: ...utdoor PCB Malfunction Detection Malfunction Ŷ The outdoor PCB broken leads to communication fault Decision Ŷ The indoor PCB broken leads to communication fault Conditions Supposed Ŷ Communication wiring disconnected Causes Ŷ The indoor PCB is broken Ŷ The outdoor PCB is broken Ŷ The Module PCB is broken Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connecto...

Page 41: ...Service diagnosis 40 Domestic air conditioner ...

Page 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...

Page 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...

Page 44: ...11 Circ cuit Diag grams 43 Do C omestic air ircuit Diagra conditioner ams r ...

Page 45: ...44 Do C omestic air ircuit Diagra conditioner ams r ...

Page 46: ...stic air conditioner Sincere Forever Haier Group Haier Industrial Park No 1 Haier Road 266101 Qingdao China_ Http www haier com Edited by Signed by Approved by Shi Haiyan Yang Xiaodong He shiquan Wu Hongjin ...

Page 47: ...al 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 2018 Qingdao Haier Air Conditioner General corp Ltd All rights reserved Unauthorized co...

Page 48: ...Removal Procedure 1 Domestic air conditioner Removal of front panel Indoor unit Step Procedure Points 1 Features 2 Remove the front panel 1 Hold the front panel by the tabs on the both sides and lift it ...

Page 49: ...Removal Procedure 2 Domestic air conditioner Step Procedure Points 2 3 Loosen the screw and lift up the casing cover Loosen the screw and lift up the control box cover Loosen the screw Loosen the screw ...

Page 50: ...box and then release the pivots on both sides of the unit to remove the front panel Remove the air filters 1 Lift an air filter upwards slightly and then pull it out downwards Remove the horizontal flap 1 Release the side of pivot and then Release the Center of the pivot Bend the horizontal blade slightly and remove it The horizontal flap is Single ...

Page 51: ...Removal Procedure 4 Domestic air conditioner Remove the casing Step Procedure Points 1 2 Release the screw covers 3EA Loosen the marked Screw 7EA ...

Page 52: ...nts 3 Release the marked hooks 4EA and then Pull the front grille out Horizontally and remove it When assembling install the front grille horizontally so as not to stuff the flap inside When assembling make sure the four hooks are caught properly Holes 4EA HOOK 4EA ...

Page 53: ...rocedure Points 1 2 Release the top cover of the control box hooks and then remove it Pull the Harness out of the PCB unit and then Loosen the control Box screws 2EA Pull the control box from of the frame and remove it Harness Stepping motor and fan motor harness Hooks 3EA Loosen screws 2EA ...

Page 54: ...Removal Procedure 7 Domestic air conditioner Release stepping motor and control box Step Procedure Points 3 Loosen the stepping motor screws 2EA and then Release the stepping motor ...

Page 55: ...estic air conditioner Removal of Heat Exchanger Step Procedure Points 1 2 Loosen the marked screws 2EA Pull mounting plate and heat exchanger bracket out from Hook of the base frame and then release them Loosen the Screws 2EA ...

Page 56: ...Removal Procedure 9 Domestic air conditioner Step Procedure Points 3 Release the fixture plate from the base frame hook and remove it ...

Page 57: ... Procedure 10 Domestic air conditioner Step Procedure Points 4 Loosen the marked screws 7EA And then Remove the heat exchanger Remove Fan Motor 1 Loosen the marked screws 4EA and release the cover of fan motor ...

Page 58: ... Step Procedure Points 1 2 Loosen the marked screw 2EA of fan motor up bracket and remove it Loosen the marked screw 1EA of fan motor and remove fan motor ove it Screw of fan rotor Screw of Fan Motor up bracket Fan motor bracket UP Fan motor assy ...

Page 59: ...val Procedure 12 Domestic air conditioner Step Procedure Points 3 Lift up the right part of the fan and remove it Remove horizontal louver and fan motor bracket 1 Every blade go round and round then move it ...

Page 60: ...ocedure 13 Domestic air conditioner Remove fan motor bracket and fan bearing Step Procedure Points 1 2 Pull the hook of fan motor bracket and upward remove it Pull the hook of bearing bracket and upward remove it ...

Page 61: ...val Procedure 14 Domestic air conditioner Remove frame work board Step Procedure Points 1 2 Loosen the marked screw of frame work board Pull the hook of frame work board remove it Screw of frame work board ...

Page 62: ...edure 15 Domestic air conditioner Remove drain pipe and drain pipe stem Step Procedure Points 1 2 Loosen the marked screw of drain pipe and then remove it Pull the drain pipe stem from base frame and the remove it ...