Heiko JZ068-C2 Service Manual
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Heiko JZ068-C2 Service Manual

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SERVICE MANUAL
Model JZ068-C2
WARNING
This service information is designed for experienced repair technicians only and is not designed for use by the general publi
c.
●
It does not contain warnings or cautions to advise non-technical 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
2021 (Qingdao Haier Air Conditioner General corp. , Ltd)
All rights reserved. Unauthorized copying and distribution is a violation of law
Version：V1
Date：2023-03-02
Domestic air conditioner

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  • Page 1 SERVICE MANUAL Model JZ068-C2 WARNING This service information is designed for experienced repair technicians only and is not designed for use by the general publi ● It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.

  • Page 2: Table Of Contents

    Contents Contents 1.Introduction ..................... 1 2.Specifications ..................7 3.Sensors list ..................... 8 ● 4.Pinping diagrams ..................9 ● 5.Operation range ..................10 6.Printed Circuit Board Connector Wiring Diagram ......... 11 7.Outdoor Functions and Control ............. 14 8.Dimensional drawings ................28 ●...

  • Page 3: Introduction

    Introduction 1.Introduction 1.1 Model name explanation series 24000 BTU Outdoor unit Domestic air conditioner...
  • Page 4 Intuoduction 1.2 Safety Cautions Be sure to read the following safety cautions before conducting repair work. The caution items are classified into “Warning” and “Caution”. The “Warning” items are especially important since they can lead to death or serious injury if they are not followed closely. The “Caution” items can also lead ●...
  • Page 5 Intuoduction When disconnecting the suction or discharge pipe of the compressor 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.
  • Page 6 Intuoduction 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 the equipment, make sure that the new installation site has sufficient strength to withstand the weight of the equipment.
  • Page 7 Intuoduction itself is harmless, but it can generate toxic gases when it contacts flames, such as fan and other heaters, stoves and ranges. When replacing the coin battery in the remote controller, be sure to disposed of the old battery to prevent children from swallowing it.
  • Page 8 Intuoduction Caution Check to see if the parts and wires are mounted and connected properly, and if the connections at the soldered or crimped terminals are secure. Improper installation and connections can cause excessive heat generation, fire or an electrical shock. ●...

  • Page 9: Specifications

    Specification 2.Specifications NOMINAL DISTRIBUTION SYSTEM VOLTAGE ● Phase Frequency Voltage 220-240 NOMINAL CAPACITY and NOMINAL INPUT Cooling heating 6.8(2.2-8.5) 6.8(2.4-9.5) Capacity rated Btu/h 23200(7500-29000) 23200(8180-32410) ● Power Consumption(Rated) 2.11 1.83 SEER/SCOP 6.8/A++ 4.0/A+ Annual energy consumption 1960 Moisture Removal m³/h 2.0*10 ﹣³...

  • Page 10: Sensors List

    Specification c t i 2*30*1.4 TECHNICAL SPECIFICATIONS-OTHERS Refrigerant type Refrigerant charge Refrigerant Maximum allowable distance circuit between indoor an outdoor Maximum allowable level difference ● Refrigerant control liquid Φ6.35 Piping connections Φ12.7 (external diameter) drain Φ16 ● Heat insulation type Both liquid and Gas pipes ●...

  • Page 11: Pinping Diagrams

    Piping diagrams 4.Piping diagrams 12.7CuT 6.35CuT 12.7CuT 6.35CuT Domestic air conditioner...

  • Page 12: Operation Range

    Operation range 5.Operation range Domestic air conditioner...

  • Page 13: Printed Circuit Board Connector Wiring Diagram

    Wiring diagrams 6.Printed Circuit Board Connector Wiring Diagram Connectors PCB (1) (Outdoor Control PCB) Connector for power N and L ● Connector for ground CN7(BLACK) CN8(WHITE) Connector for the U, V, W wire of the compressor CN9(RED) L-IN(CN5) Connector for reactor L-OUT (CN6) CN10 Connector for fan motor...
  • Page 14 Wiring diagrams PCB (1) Bottom L N PE heater 4-way valve E-valve Sensor DC fan motor ● Compressor PFC Reactor ● Domestic air conditioner...
  • Page 15 Wiring diagrams Wiring diagrams Domestic air conditioner...

  • Page 16: Outdoor Functions And Control

    Functions and control 7.Outdoor Functions and Control 7.1 Main functions and control specification .1.1 The operation frequency of outdoor unit and its control ● 7.1.1.1 The operation frequency control of compressor The operation frequency scope of compressor： Mode Minimu m operation frequency Maximum operation frequency ●...
  • Page 17 Functions and control Wh_c<-8 Max_hz2 109HZ Wh_c<-2 Max_hz3 98HZ Wh_c<5 Max_hz4 86HZ Wh_c<10 Max_hz5 81HZ Wh_c<17 Max_hz6 77HZ Wh_c<20 Max_hz7 70HZ Wh_c>＝20 Max_hz8 66HZ Remarks: The above are the maximum frequency limitations of the complete appliance which are affected by the environment, and they have nothing to do with the ability of the indoor unit. Refrigeration/dehumidification mode: Serial No.
  • Page 18 Functions and control When refrigerating, it is needed to satisfy F-MIN-d(compressor’s Min_hz)< F<F-MAX-d(compressor’s Max_hz) When heating, it is needed to satisfy F-MIN-r (compressor’s Min_hz)< F<F-MAX-r (compressor’s Max_hz) PID control : The innital frequency Sn is determined by Pn . We can calculate Hzoutf according to the value of Kp ,Ki ,Kd, Out_gain,Pn.Then , Fn = Sn + Hzoutf.
  • Page 19 Functions and control 7.1.4 Four way valve control For the details of defrosting four-way valve control, see the defrosting process. Four way working in other ways: Under the mode of heating, open the four-way valve, when the compressor is not started or changed to non-heating mode, make sure the compressor is stoped for 2 minutes, and then close the four-way valve.
  • Page 20 Functions and control state). TC=indoor coil temp. The indoor heat exchanger sensor tests the temperature of the indoor heat exchanger. If the temperature is higher than 63 ℃ , decrease the rotate speed of the compressor and do the high temperature-preventing protection of the indoor heat exchanger;...
  • Page 21 Functions and control the compressor increases at the prohibited speed. During the starting process of the compressor, if the AC current is greater than 6.5A, the frequency of the compressor increases at the speed of no faster than 0.1HZ/second. Remarks: when the outdoor temperature is high, there’s compensation for AC current protection. (1) When the outdoor environment temperature is higher than 40℃, AC current protection value decreases by 2A/1A(09K/12K).
  • Page 22 Functions and control the compressor decreases 1hz/10seconds. Keep the frequency until it decreases to the lowest frequency. When the temperatures are lower than 68℃ and higher than 62℃, keep the frequency of the compressor. When the temperatures are lower than 62℃, relieve the defrosting temperature protection. 7.2 Value of Thermistor Ambient Sensor, Defrosting Sensor, Pipe sensor ●...
  • Page 23 Functions and control 25.3193 23.9462 22.6273 -1.23 1.18 24.1432 22.8656 21.6361 -1.20 1.16 23.0284 21.8398 20.6939 -1.18 1.14 21.9714 20.8659 19.7982 -1.15 1.12 20.9688 19.9409 18.9463 -1.13 1.09 20.0176 19.0621 18.1358 -1.11 1.07 19.1149 18.2270 17.3646 -1.08 1.05 18.2580 17.4331 16.6305 -1.06 1.03...
  • Page 24 Functions and control 4.2026 3.9686 3.7443 -1.65 1.59 4.0588 3.8287 3.6084 -1.70 1.62 3.9206 3.6943 3.4780 -1.74 1.66 3.7878 3.5654 3.3531 -1.78 1.70 3.6601 3.4416 3.2332 -1.82 1.74 ● 3.5374 3.3227 3.1183 -1.87 1.78 3.4195 3.2085 3.0079 -1.91 1.82 3.3060 3.0989 2.9021 -1.95...
  • Page 25 Functions and control 1.0607 0.9599 0.8679 -3.74 3.42 1.0314 0.9326 0.8424 -3.80 3.46 1.0030 0.9061 0.8179 -3.85 3.51 0.9756 0.8806 0.7941 -3.90 3.55 0.9490 0.8558 0.7711 -3.96 3.60 0.9232 0.8319 0.7489 -4.01 3.64 0.8983 0.8088 0.7275 -4.07 3.69 0.8741 0.7863 0.7067 -4.12 3.74...
  • Page 26 Functions and control 7928.7217 6647.4547 5568.2222 -2.84 2.39 7423.3626 6235.7109 5233.3554 -2.83 2.39 6953.2930 5851.9864 4920.6791 -2.82 2.38 6515.8375 5494.2064 4628.5894 -2.80 2.37 6108.5393 5160.4621 4355.6078 -2.79 2.37 5729.1413 4848.9963 4100.3708 -2.77 2.36 5375.5683 4558.1906 3861.6201 -2.76 2.35 5045.9114 4286.5535 3638.1938 -2.75 2.34...
  • Page 27 Functions and control 624.3328 563.6604 508.4261 -2.12 1.93 593.5446 536.6540 484.7796 -2.10 1.92 564.4275 511.0760 462.3510 -2.09 1.90 536.9865 486.9352 441.1516 -2.07 1.89 511.0105 464.0500 421.0258 -2.05 1.87 486.4151 442.3499 401.9146 -2.03 1.86 463.1208 421.7683 383.7626 -2.01 1.84 441.0535 402.2430 366.5175 -1.99 1.83...
  • Page 28 Functions and control 85.4976 81.7908 78.1744 -1.15 1.12 82.1303 78.6615 75.2715 -1.13 1.10 78.9116 75.6668 72.4902 -1.10 1.08 75.8343 72.8004 69.8249 -1.08 1.06 72.8916 70.0561 67.2703 -1.05 1.03 70.0770 67.4283 64.8213 -1.03 1.01 67.3844 64.9115 62.4731 -1.00 0.99 64.8080 62.5006 60.2211 -0.98 0.96...
  • Page 29 Functions and control 18.5157 17.4166 16.3680 -2.02 1.93 17.9590 16.8769 15.8458 -2.06 1.96 17.4214 16.3564 15.3427 -2.10 2.00 16.9023 15.8542 14.8577 -2.15 2.04 16.4010 15.3696 14.3902 -2.19 2.08 15.9167 14.9020 13.9394 -2.23 2.12 15.4489 14.4506 13.5047 -2.27 2.16 14.9968 14.0149 13.0855 -2.32 2.19...

  • Page 30: Dimensional Drawings

    Dimensinal dr awings 8 Dimensional drawings unit:mm 9 Center of gravity unit:mm Domestic air conditione r...

  • Page 31: Service Diagnosis

    Service Diagnosis 10 Service Diagnosis 10.1 Caution for Diagnosis The operation lamp flashes when any of the following errors is detected. 1.When a protection device of the indoor or outdoor unit is activated or when the thermistor malfunctions, disabling equipment operation. 2.When a signal transmission error occurs between the indoor and outdoor units.In either case, conduct the diagnostic procedure described in the following pages.
  • Page 32 Service Diagnosis Error Codes and Description indoor display 10.4 Split board: LED1 light of outdoor PCB flash; All-in-one board: LED2 light of outdoor PCB flash OUTDOOR ERROR CODE FAULT DESCRIPTION SPARE PART (LED FLASH TIMES) Indoor PCB Indoor and Communication fault between indoor Outdoor PCB Outdoor and outdoor units...
  • Page 33 Service Diagnosis OUTDOOR ERROR CODE FAULT DESCRIPTION SPARE PART (LED FLASH TIMES) Lack of refrigerant Refrigerant 4-way valve reverse failure 4-way valve Power over/under voltage protection Power module Outdoor pipe temperature sensor High pressure protection Outdoor PCB Outdoor coil temperature sensor Defrost temperature sensor Power module Outdoor Alternating current over...
  • Page 34 Service Diagnosis 10.4.1 Thermistor or Related Abnormality Indoor Display E1: Room temperature sensor failure 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 Malfunction...
  • Page 35 Service Diagnosis 10.4.2 EEPROM abnormal E4: Indoor EEPROM error Indoor Display Indoor display F12: Outdoor EEPROM error; Outdoor LED1 flash 1 times Method of Malfunction The Data detected by the EEPROM are used to determine MCU Detection Malfunction When the data of EEPROM is error or the EEPROM is damaged Decision Conditions Supposed...
  • Page 36 Service Diagnosis Indoor DC fan motor malfunction 10.4.3 Indoor Display E14 Indoor DC fan motor malfunction Method of When the fan motor is running, the speed detected by the Hall IC is used to judge the Malfunction abnormal operation of the fan motor Detection Malfunction When the detected rotation feedback signal don’t received in 2 minutes...
  • Page 37 Service Diagnosis Turn on the unit and check if Measure whether there is a voltage the motor can run pulse (0-15VDC) between 4 and 5 of the CN9 terminal on the indoor PCB The indoor motor is damaged Is it ok? and need replace The indoor PCB is damaged and need replace...
  • Page 38 Service Diagnosis 10.4.4 Outdoor DC fan motor fault Outdoor display F8 LED1 flash 9 times Method of DC fan motor is detected by checking the fan running condition and so on Detection Malfunction When the detected rotation feedback signal don’t received i n2 minutes Decision Conditions ■...
  • Page 39 Service Diagnosis The resistances The module PCB is between black line and The resistances are damaged, replace it red line, between black more than 40kΩ with a new one. line and white line of the fan terminal of outdoor PCB are greater than 10MΩ...
  • Page 40 Service Diagnosis 10.4.5 IPM protection Outdoor display: F1 LED1 flash 2 times Method of IPM protection is detected by checking the compressor running condition and so on Malfunction Detection The system leads to IPM protection due to over current Malfunction Decision The compressor faulty leads to IPM protection Circuit component of IPM is broken and led to IPM protection...
  • Page 41 Service Diagnosis 10.4.6 Over-current of the compressor Outdoor Display F22, F2, F23 LED1 flash 3 or 24 or 25 times Method of The current of the compressor is too high Malfunction Detection Malfunction When the IPM Module is damaged or the compressor is damaged. Decision Conditions Power supply voltage is too low or too high...
  • Page 42 Service Diagnosis 10.4.7 The communication fault between IPM and outdoor PCB Outdoor display: F3 LED1 flash 4 times Method of Malfunction Communication is detected by checking the IPM module and the outdoor PCB Detection Malfunction ■ The outdoor PCB broken leads to communication fault Decision ■...
  • Page 43 Service Diagnosis 10.4.8 Power Supply Over or under voltage fault Outdoor display: F19 LED1 flash 6 times An abnormal voltage rise or fall is detected by checking the specified voltage detection circuit. Method of The power supply is over voltage Malfunction Detection Malfunction...
  • Page 44 Service Diagnosis 10.4.9 Overheat Protection for Discharge Temperature Outdoor display: F4 LED1 flash 8 times Method of Check the control of the discharge temperature by the temperature detected by the Malfunction discharge pipe thermistor Detection Malfunction When the compressor discharge temperature is above 110℃ Decision Conditions ■...
  • Page 45 Service Diagnosis 10.4.10 The communication fault between indoor and outdoor Split board Indoor display E7 outdoor display LED1 flash 15 times Method of Communication is detected by checking the indoor PCB and the outdoor PCB. Malfunction Detection Malfunction The outdoor PCB broken leads to communication fault. Decision The indoor PCB broken leads to communication fault.
  • Page 46 Service Diagnosis Check the indoor PCB: only indoor charged measure the voltage between 3 and 4 of IC6 on the indoor PCB with a universal meter. And measure the voltage between CN23(S) and CN17 (L) with a universal meter. If the voltage is a constant value from DC 0V to DC 5V.Or The indoor PCB is the voltage between...
  • Page 47 Service Diagnosis Remove fan motor after Fan motor is switch off the power and damaged. And restart the unit, the LED replace it with a new 1 becomes light or flash. one. Test the fan motor terminal resistance between pin 1(310V) and pin 4(0V), or pin 5(15V) and pin 4(0V) of CN21 are close to 0mΩ...
  • Page 48 Service Diagnosis All-in-one board Indoor display E7 outdoor display LED2 flash 15 times Method of Communication is detected by checking the indoor PCB and the outdoor PCB. Malfunction Detection The outdoor PCB broken leads to communication fault. Malfunction  The indoor PCB broken leads to communication fault. Decision ...
  • Page 49 Service Diagnosis Check the indoor PCB: Only indoor charged measure the voltage between 3 and 4 of IC6 on the indoor mainboard with a universal meter. And measure the voltage between CN23(S) and CN52 (L) with a universal meter. If the voltage is a constant value of 0V DC to 5V DC .Or the voltage between communication line (red) The indoor PCB is damaged;...
  • Page 50 Service Diagnosis Remove fan motor after switch off the power and Fan motor is damaged. Replace restart the unit, the LED 2 it with a new one. becomes light or flash. Test the fan motor terminal resistance between pin 1 (310V) and pin 4 (0V), or pin5 (15V) and pin4 (0V) of CN21 are close to 0mΩ...
  • Page 51 Service Diagnosis 10.4.11 Loss of synchronism detection (Compressor position detection circuit fault) Outdoor Display F11 LED1 flash 18 times F28 LED1 flash 19 times Method of The position of the compressor rotor can’t detected normally Malfunction Detection Malfunction When the wiring of compressor is wrong or the connection is poor; Decision Or the compressor is damaged Conditions...
  • Page 52 Service Diagnosis 10.4.12 High work-intense protection Outdoor display E 9 LED1 flash 21 times High work-intense control is activated in the heating mode if the temperature Method of being sensed by the heat exchanger thermistor exceeds the limit. Malfunction Detection Malfunction Activated when the temperature being sensed by the heat exchanger rises above 65℃...

  • Page 53: Performence And Cerves Diagrams

    Performance and ceves diagrams 11.Performence and cerves diagrams 11.1 Cooling capacity-temperature curves ● Domestic air conditioner...
  • Page 54 Performance and ceves diagrams 11.2 Cooling power consumption value- temperature curves ● Domestic air conditioner...
  • Page 55 Performance and ceves diagrams 11.3 Cooling discharge pressure curves Domestic air conditioner...
  • Page 56 Performance and ceves diagrams 11.4 Cooling suction pressure curves Domestic air conditioner...
  • Page 57 Performance and ceves diagrams 11.5 Heating capacity-temperature curves Domestic air conditioner...
  • Page 58 Performance and ceves diagrams 11.6 Heating power consumption value- temperature curves Domestic air conditioner...
  • Page 59 Performance and ceves diagrams 11.7 Heating discharge pressure curves Domestic air conditioner...
  • Page 60 Performance and ceves diagrams 11.8 Heating suction pressure curves Domestic air conditioner...

  • Page 61: Sound Level

    Circuit diagrams 12.Sound level Sound pressure level 230V,50HZ Sound power level Model Measuring location (cooling/heating) Cooling/heating microphone JZ068-C2 Domestic air conditioner...

  • Page 62: Wiring Diagrams

    Circuit diagrams 13 Wiring Diagrams 13.1 Outdoor unit control board circuit diagrams ICE5AR4770BZ ３０Ａ／６００Ｖ，　ＩＫＣＭ３０Ｆ６０ＧＤ Domestic air conditioner...

  • Page 63: Removal Procedure

    Removal of procedure 14.Removal Procedure . Warning Be sure to wait 10 minutes or more after turning off all power supplies Procedure before disassembling work Step 1. Removal of Outdoor panel Procedure Points 1.Remove the panels Loosen the screws and lift the top panel and remove the handle.
  • Page 64 Removal of procedure Points Step Procedure Loosen the screws of the panel, pull and remove the front panel. Loosen the fixting screws and remove the side panel. Domestic air conditioner...
  • Page 65 Removal of procedure Removal of Electrical Box Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points Remove the fixing screws, than lift the electrical box. Domestic air conditioner...
  • Page 66 Removal of procedure Removal of Fan and Fan Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points Loosen the fixing screw and remove the fan. Domestic air conditioner...
  • Page 67 Removal of procedure Procedure Step Points Loosen fixing screws and remove the fan motor. Put the head wire through the back of motor when assembling.(so as not to be entangled with the propeller fan) Domestic air conditioner...
  • Page 68 Removal of procedure Removal of fan motor bracket and partition Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points Loosen fixing screws and remove the fan motor bracket. Domestic air conditioner...
  • Page 69 Removal of procedure Step Procedure Points Loosen fixing screws. The partition When assembling, fit plate has a hook on the lower hook into the lower side, than lift the bottom frame. pull proof plate. Remove partition plate. Domestic air conditioner...
  • Page 70 Removal of procedure Removal of compressor and heat exchanger Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points down concenting pipe and compressor remove valve bracket. Domestic air conditioner...
  • Page 71 Removal of procedure Step Procedure Points Loosen the marked fixing screws remove heat exchanger. Domestic air conditioner...
  • Page 72 Generalny Dystrybutor Systemów Klimatyzacji i Pomp Ciepła HEIKO REFSYSTEM Sp. z o. o. ul. Metalowców 5 86-300 Grudziądz +48 723 737 378 www.heiko.pl...

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