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Wall Mounted Type DC Inverter Model No. GES-NX2G50OUT WARNING This service information is designed for experienced repair technicians only and is not designed for use by the general public. It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Introduction 1. Introduction 1.1 Model name explanation outdoor units 5000W Side closure Platform of indoor units: N (N platform) Split units Brand 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 R410a Refrigerant charge Refrigerant Maximum allowable distance circuit between indoor an outdoor Maximum allowable level difference Refrigerant control Capillary liquid 6.35 Piping connections 12.7 (external diameter) drain Heat insulation type Both liquid and Gas pipes Max.
Printed circuit board connector wiring diagram 6. Printed circuit board connector wiring diagram Connectors PCB (1) (Control PCB) For GES-NX2G50OUT 1) CN1, CN2 Connector for power N and L 2) CN3 Connector for ground 3) CN22 Connector for DC POWER 15Vand 5V to the module board...
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Printed circuit board connector wiring diagram Outdoor unit wiring diagram CN9 CN8 AC-N AC-L CN11 CN10 CN26 CN22 CN24 CN23 MAIN CONTROL BOARD AC-N AC-L CN10 CN13 CN15 CN14 CN19 CN18 CN17 CN20 CN16 Remark the dotted parts are optional for different 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 Minimun operation frequency Maximun operation frequency 7.1.1.2 The starting of compressor When the compressor is started for the first time, it must be kept under the conditions of...
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Functions and control Refrigeration/dehumidification mode: Serial No. Temperature scope Frequency limitation Wh_c<28 Max_hz1 56HZ Wh_c<32 Max_hz2 76HZ Wh_c<40 Max_hz3 90HZ Wh_c<48 Max_hz4 80HZ Wh_c>=48 Max_hz5 72HZ Remarks: the above are not only the maximum frequency limitations of the complete appliance which are affected by the environment, but also the maximum ability limitation of the system.
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Functions and control 7.1.2 The outdoor fan control (Exchange fan) When the fan is changed among every airflow speed (including stop blowing), in order to avoid the airflow speed from skipping frequently, it must be kept under each mode for over 30 seconds, and then it can be changed to another mode (when refrigerating, the time is changed to 15 seconds).
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Functions and control 7.1.4 Four way 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.
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Functions and control TC( ) The compressor stops Fgh_t1 65 Fgh_t1 2 Fgh_t2 2 N Decreasing the frequency rapidly Fgh_t2 59 P Decreasing the frequency slowly Fgh_t3 Fgh_t3 2 Fgh_t4—2 Q Prohibiting increasing the frequency Fgh_t4 R Increasing slowly Fgh_t5 Fgh_t5—2 Normal N Decreasing at the speed of 1HZ/1 second...
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Functions and control decreases by 1A. (2) When the outdoor environment temperature is higher than 50 , AC current protection value decreases by 2.5A. 7.1.5.5 Anti-freezing protection of the indoor heat exchanger When refrigerating/heating, prevent freezing. Tpg_indoor is the minimum value of the effective indoor unit (start it and it is in accord with the running state).
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Functions and control the compressor. When the temperatures are lower than 60 , relieve the defrosting temperature protection. 7.2 Value of Thermistor Ambient Sensor, Defrosting Sensor, Pipe sensor R25 =10K 3% B25 /50 =3700K 3% Temp.( ) Max.(K ) Normal(K ) Min.(K ) Tolerance( ) 165.2170...
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.
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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 Reference Outdoor fault description panel code indication Page (LED1 flash Only For 498 and times) 498A display other display (Red/Green Time Run) Flash Indoor and Communication fault between indoor and ★...
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Service diagnosis 10.3.1 Thermistor or Related Abnormality ★ Indoor Display Room temperature sensor failure Heat-exchange sensor failure Outdoor display flash 10 times Defrost temperature sensor failure flash 11 times Suction temperature sensor failure flash 12 times Ambient temperature sensor failure 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 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 detected rotation feedback signal don’t received in 2 minutes Decision Conditions Supposed...
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Service diagnosis Check whether Terminal on the outdoor mainboard is well inserted. Reinsert the terminals Is it normal? Electrify the machine again and turn it on in the Cool state with the remote controller. check whether motor can Measure the voltage between 1 and 3 of the terminal of fan motor on the mainboard about DC310V, Measure the voltage between 3 and 4 of the terminal about DC15V.
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Service diagnosis 10.3.5 IPM protection Outdoor display: LED1 flash 2 times 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 circuit component of IPM is broken and led to IPM protection...
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Service diagnosis 10.3.6 Over-current of the compressor Outdoor Display: 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 Electrify the machine again and turn it on with the remote controller, If malfunctions IPM Module is damaged and are reported before or upon the compressor needs replacing. being started up, The compressor is started normally, but malfunctions are reported after it has Repair the power supply run for some time.
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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: 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 Check the indoor mainboard. Measure the voltage between Jumpers 3 and 4 of IC1 on the indoor mainboard with a multimeter. Test the outdoor power supply (230VAC and +310VDC) with a multimeter. If the voltage is of a constant value of 0V DCto5V DC If 230VAC is available but 310DC not, the power module is damaged, replace it...
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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 Indoor Display ★★★ / E9 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...
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REMOVAL PROCEDURE Wall Mounted Type DC Inverter FREE MATCH SERIES: 40 STEEL SHELL WARNING This service information is designed for experienced repair technicians only and is not designed for use by the general public. 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.
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Removal of procedure 1.Removal of Outdoor panel Domestic air conditioner...
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Removal of procedure Loosen the top panel screws Lift the top panel Domestic air conditioner...
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Removal of procedure Loosen the screws and pull the panel Domestic air conditioner...
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Removal of procedure 2. Removal of Electrical Box Domestic air conditioner...
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Removal of procedure 3. Removal of Fan and Fan Motor Domestic air conditioner...
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Removal of procedure Loosen the fixing screws and remove the motor Domestic air conditioner...
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Removal of procedure 4. Removal of Fan Motor Bracket and Partition Domestic air conditioner...
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Removal of procedure Loosen the screw and remove the reactor Domestic air conditioner...
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Removal of procedure 5. Removal of Compressor and Heat Exchanger Loosen the marked screws and pull out the backgurd Domestic air conditioner...
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Removal of procedure Remove the compre -ssor and pipe assay Remove the conden -ser Domestic air conditioner...