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Repair the product or products dealt with in this service information by anyone else could result in serious injury or death 2019 (Qingdao Haier Air Conditioner General corp. , Ltd) All rights reserved. Unauthorized copying and distribution is a violation of law...
Introduction 1. Introduction 1.1 Model name explanation Series number 220-240V50HZ/1ph DC inverter R32 refrigerant Version number Europe Platform of outdoor units: New40 (New40 platform) Nominal cooling capacity (18000BTU/h) Type of outdoor unit : U (normal type) The maximum combination number Domestic air conditioner...
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Introduction 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 to serious accidents under some conditions if they are not followed.
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Introduction Warning Do not repair the electrical components with wet hands . Working on the equipment with wet hands can cause an electrical shock Do not clean the air conditioner by splashing water. Washing the unit with water can cause an electrical shock.
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Introduction Warning Be sure to use an exclusive power circuit for the equipment, and follow the technical standards related to the electrical equipment, the internal wiring regulations and the instruction manual for installation when conducting electrical work. Insufficient power circuit capacity and improper electrical work can cause an electrical shock or fire. Be sure to use the specified cable to connect between the indoor and outdoor units.
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Introduction 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.
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Introduction 1.2.5 Using Icons List Icon Type of Information Description A “note” provides information that is not indispensable, but may Note Note nevertheless be valuable to the reader, such as tips and tricks. A “caution” is used when there is danger that the reader, through incorrect manipulation, may damage equipment, loose data, get Caution Caution...
Specification TECHNICAL SPECIFICATIONS-OTHERS Refrigerant type Refrigerant charge 0.95 Refrigerant Maximum allowable distance circuit between indoor an outdoor Maximum allowable level difference Refrigerant control liquid 6.35 Piping connections 12.7 (external diameter) drain Heat insulation type Both liquid and Gas pipes Max. piping Length Max.
Printed circuit board connector wiring diagram 6. Printed circuit board connector wiring diagram Connectors PCB (1) (Control PCB) 1) CN1, CN2 Connector for power N and L 2) CN3 Connector for ground 3) CN23 Connector for DC POWER 15V and 5V to the module board 4) CN9, CN10 Connector for CN2,CN1 on the module board 5) CN22 Connector for fan motor 6) CN11 Connector for four way valve coil...
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Printed circuit board connector wiring diagram PCB (1) Bottom L N PE heater 4-way valve E-valve Sensor DC fan motor Compressor PFC Reactor Domestic air conditioner...
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Printed circuit board connector wiring diagram PCB(2) L N PE Bottom heater 4-way valve E-valve Sensor DC fan motor Compressor PFC Reactor Domestic air conditioner...
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Functions and control Wiring diagrams OUTDOOR UNIT Domestic air conditioner...
Functions and control 7. Functions and control 7.1 Main functions and control specification 7.1.1 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 Minimum operation frequency Maximum operation frequency Heating 18K/24K 24 Hz /20Hz...
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Functions and control Wh_c<-2 Max_hz3 103HZ/87 HZ Wh_c<5 Max_hz4 90HZ/76 HZ Wh_c<10 Max_hz5 78HZ/67 HZ Wh_c<17 Max_hz6 67HZ/62 HZ Wh_c<20 Max_hz7 56HZ/44 HZ Wh_c> 20 Max_hz8 52HZ/39 HZ 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.
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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.
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Functions and control The EEV opening will increase if SH (superheat degree) >0 while decrease if SH<0. Adjust frequency: If |SH|=0, 60s/ 1 step If |SH| 3,and SH=0, 10s/ 1 step. If 3 |SH| 0, 30s/ 1 step. SH= current SH- last SH SH= Ts (suction temp)-Tc1 (indoor coil temp)-Tsh (fixed data, depend on different models, -1~2) 7.1.4 Four way control For the details of defrosting four-way valve control, see the defrosting process.
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Functions and control (18K/24K) TC( ) The compressor stops Fgh_t1 63 /63 Fgh_t1 2 Fgh_t2 2 N Decreasing the frequency rapidly Fgh_t2 59 /59 P Decreasing the frequency slowly Fgh_t3 56 /57 Fgh_t3 2 Fgh_t4—2 Q Prohibiting increasing the frequency Fgh_t4 53 /51 R Increasing slowly Fgh_t5 40 /40...
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Functions and control During the starting process of the compressor, if the AC current is greater than 13.5/14A(18K/24K), the frequency of the compressor decreases at the speed of 0.1HZ/second. During the starting process of the compressor, if the AC current is greater than 13A/13A(18K/24K), the frequency of the compressor increases at the prohibited speed.
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Functions and control control-driven chip will enter into weak magnetic control, this will help to relieve the problem of modification rate. If during the course of weak magnetic control, the modification rate is still not high enough, enter into the control of decreasing frequency until the alarm of modification rate is relieved. 7.1.5.7 Temperature protection of the outdoor refrigerating coil When the frequency are higher than 40Hz,and the defrosting sensor’s temperature are higher than , the frequency of the compressor decreases 1hz/10seconds.
Service diagnosis 10.Service Diagnosis 10.1 Caution for Diagnosi 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.
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Service diagnosis 10.2 Problem Symptoms and Measures Check the power supply. Check to make sure that the rated voltage is supplied. None of the units operates Check the indoor PCB Check to make sure that the indoor PCB is broken Operation A power failure of 2 to 10 cycles can stop air conditioner Check the power supply.
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Service diagnosis 10.3 Error Codes and Description indoor display Code indication Indoor displaying panel code indication Only For 498 and Outdoor fault description Reference Page Code indication 498A display (LED1 flash Other display (Red/Green Time times) Run □On★Flash■ Off) Communication fault Indoor and between indoor and outdoor Page.43...
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Service diagnosis 10.3.1 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 The temperatures detected by the thermistors are used to determine thermistor errors...
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Service diagnosis 10.3.2 EEPROM abnormal Indoor Display E4: Indoor EEPROM error Indoor display F12: Outdoor EEPROM error; Outdoor LED1 flash 1 times Method of The 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...
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Service diagnosis 10.3.3 Indoor AC fan motor malfunction Indoor Display Method of The rotation speed detected by the Hall IC during fan motor operation is used to determine Malfunction abnormal fan motor operation Detection Malfunction when the detected rotation feedback signal don’t received in 2 minutes Decision Conditions Supposed...
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Service diagnosis 10.3.4 Outdoor DC fan motor fault Outdoor display LED1 flash 9 times Method of DC fan motor is detected by checking the fan running condition and so on Malfunction Detection Malfunction when the data of EEPROM is error or the EEPROM is damaged Decision Conditions Supposed...
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Service diagnosis Domestic air conditioner...
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Service diagnosis 10.3.5 IPM protection / F1 LED1 flash 2 times Outdoor display: Method of IPM protection is detected by checking the compressor running condition and so on Malfunction Detection Malfunction The system leads to IPM protection due to over current Decision The compressor faulty leads to IPM protection Conditions...
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Service diagnosis 10.3.6 Over-current of the compressor Outdoor Display: F2 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 Decision or the compressor is damaged. Conditions power supply voltage is too low or too high Supposed...
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Service diagnosis 10.3.7 The communication fault between IPM and outdoor PCB Outdoor display: LED1 flash 4 times Method of Communication is detected by checking the IPM module and the outdoor PCB Malfunction Detection Malfunction The outdoor PCB broken leads to communication fault Decision The IPM module broken leads to communication fault Conditions...
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Service diagnosis 10.3.8 Power Supply Over or under voltage fault Outdoor display: LED1 flash 6 times The power supply is over voltage Method of An abnormal voltage rise or fall is detected by checking the specified voltage detection circuit. Malfunction Detection Malfunction An voltage signal is fed from the voltage detection circuit to the microcomputer...
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Service diagnosis 10.3.9 Overheat Protection For Discharge Temperature Outdoor display: F4 LED1 flash 8 times Method of The Discharge temperature control is checked with the temperature being detected Malfunction by the Discharge pipe thermistor Detection Malfunction when the compressor discharge temperature is above 110 Decision Conditions Supposed...
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Service diagnosis 10.3.10 The communication fault between indoor and outdoor Indoor display 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.
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Service diagnosis Domestic air conditioner...
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Service diagnosis 10.3.11 Loss of synchronism detection Inverter side current detection is abnormal Outdoor Display LED1 flash 18 times LED1 flash 19 times Method of The position of the compressor rotor can not detected normally Malfunction Detection Malfunction when the wiring of compressor is wrong or the connection is poor; Decision or the compressor is damaged Conditions...
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Service diagnosis 10.3.12 High work-intense protection Outdoor display LED1 flash 21 times Method of High work-intense control is activated in the heating mode if the temperature Malfunction being sensed by the heat exchanger thermistor exceeds the limit. Detection Malfunction Activated when the temperature being sensed by the heat exchanger Decision rises above 65 twices in 30 minutes.
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Remove of front panel Outdoor unit Step Procedure Points 1.Features Loosen the service Be careful not to cover screw and cut your finger by remove the service the fins of the cover. heat exchanger Domestic air conditioner...
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Step Procedure Step Procedure Points Step Procedure Points Points 2. Remove the panels. Loosen the 7 screws and lift the top panel Loosen the screws of the panel. Pull and remove the front panel. Domestic air conditioner...
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Step Procedure Points Remove the fixting screws, then lift the electrical box Domestic air conditioner...
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Remove the air filters and horizontal flap Step Procedure Points Loosen the fixting screws and remove back protect net . ■ Loosen the fixting screws and remove the side panel. Domestic air conditioner...
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Remove the casing Step Procedure Points Loosen the fixting screws and remove the side panel. ■ Loosen the fixting screws and remove the cross beam. Domestic air conditioner...
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Step Procedure Points Loosen the fixting screws remove the fan Loosen the fixting screws and lift the fan motor. Domestic air conditioner...
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Release stepping motor (2type) Step Procedure Points Remove fixing screws,then lift the fan motor bracket Cut down and pull out compressor and remove Domestic air conditioner...
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Removal of Heat Exchanger Step Procedure Points Loosen the marked fixing screws Loosen the fixting hook remove heat exchanger Domestic air conditioner...