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GE GES-NX2G25OUT Service Manual
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GE GES-NX2G25OUT Service Manual

Wall mounted type dc inverter
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SERVICE MANUAL
Wall Mounted Type
DC Inverter
Model No.
GES-NX2G25OUT
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. 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
Version：V1
Date：20180124

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Summary of Contents for GE GES-NX2G25OUT

  • Page 1 Wall Mounted Type DC Inverter Model No. GES-NX2G25OUT 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.

  • Page 2: Table Of Contents

    Contents Contents 1. Introduction ....................1 2. Specifications..................7 3. Sensors list ....................8 4. Piping diagrams ..................9 5. Operation range ..................10 6. Printed circuit board connector wiring diagram ........11 7. Functions and control................8. Dimensional drawings................9. Center of gravity ................... 10. Service diagnosis ................11.

  • Page 3: Introduction

    Introduction 1. Introduction 1.1 Model name explanation outdoor units 2500W Side closure Platform of indoor units: N (N platform) Split units Brand Domestic air conditioner...
  • Page 4 Introduction                                                                                                                                               1.2 Safety Cautions Be sure to read the following safety cautions before conducting repair work.
  • Page 5 Introduction                                                                                                                                               Warning Do not repair the electrical components with wet hands .
  • Page 6 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...
  • Page 7 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...
  • Page 8 Introduction                                                                                                                                               1.2.5 Using Icons List Icon Type of Information...

  • Page 9: Specifications

    Specification 2 .Specifications NOMINAL DISTRIBUTION SYSTEM VOLTAGE NOMINAL CAPACITY and NOMINAL INPUT cooling heating 2.6（1.0-3.5） 2.8（1.0-4.4） Capacity rated Btu/h 8870（3400-11950） 9550（3420-15020） Power Consumption(Rated) 0.81 0.75 ³ 1.2*10 ³ TECHNICAL SPECIFICATIONS-UNIT Dimensions H*W*D 780×245×540 Packaged H*W*D 920×351×620 Dimensions 25.5 28.5 dB(A) Sound level ELECTRICAL SPECIFICATIONS n i l...

  • Page 10: Sensors List

    Specification TECHNICAL SPECIFICATIONS-OTHERS Refrigerant type R410a Refrigerant charge 0.78 Refrigerant Maximum allowable distance circuit between indoor an outdoor Maximum allowable level difference Refrigerant control Capillary liquid Φ6.35 Piping connections Φ9.52 (external diameter) drain Φ16 Heat insulation type Both liquid and Gas pipes Max.

  • Page 11: Piping Diagrams

    Pinping diagrams 4．Piping diagrams Domestic air conditioner...

  • Page 12: Operation Range

    Operation range                                                                                                                                               5．Operation range  ...

  • Page 13: Printed Circuit Board Connector Wiring Diagram

    Printed circuit board connector wiring diagram 6. Printed circuit board connector wiring diagram Connectors PCB (1) (Control PCB) For GES-NX2G25OUT 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...
  • Page 14 Printed circuit board connector wiring diagram PCB (1) CN23 CN22 CN24 CN26 CN10 CN19 CN21 Domestic air conditioner...
  • Page 15 Printed circuit board connector wiring diagram PCB(2) CN11 CN10 Domestic air conditioner...
  • Page 16 Wiring diagrams Wiring Diagrams OUTDOOR WIRING DIAGRAM 0010584656 COMPRESSOR FUSE1 CN26 R(U) C(W) S(V) T25A 250VAC CN24 OUTDOOR PCB CN23 CN11 MODULE COM BR B （ ） AC-L CN3CN4 CN1CN5 CN22 BL W （ ） CN10 AC-N MODULE PCB MODULE POWER BR B （...

  • Page 17: Functions And Control

    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 Heating 36Hz...
  • Page 18 Functions and control Refrigeration/dehumidification mode: Serial No. Temperature scope Frequency limitation Wh_c<28 Max_hz1 46HZ Wh_c<32 Max_hz2 72HZ Wh_c<40 Max_hz3 80HZ Wh_c<48 Max_hz4 65HZ Wh_c>=48 Max_hz5 50HZ 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.
  • Page 19 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).
  • Page 20 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.
  • Page 21 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 55℃ Fgh_t3－2 Fgh_t4—2 Q Prohibiting increasing the frequency Fgh_t4 51℃ R Increasing slowly Fgh_t5 47℃ Fgh_t5—2 Normal N：Decreasing at the speed of 1HZ/1 second P：Decreasing at the speed of 1Hz/10 seconds...
  • Page 22 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).
  • Page 23 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℃=10KΩ±3% B25℃/50℃=3700K±3% Temp.(℃) Max.(KΩ) Normal(KΩ) Min.(KΩ) Tolerance(℃) 165.2170 147.9497 132.3678 -1.94 1.75 155.5754 139.5600 125.0806 -1.93...
  • Page 24 Functions and control 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 17.4442 16.6782 15.9315 -1.03 1.01...
  • Page 25 Functions and control 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 1.85 3.1969 2.9935 2.8005 -2.00 1.89...
  • Page 26 Functions and control 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 0.8507 0.7646 0.6867 -4.18 3.78...
  • Page 27 Functions and control 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 4738.4141 4032.7098 3429.0191 -2.73 2.34 4451.4586 3795.3910 3233.1039 -2.72 2.33...
  • Page 28 Functions and control 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 1.83 420.1431 383.7151 350.1301 -1.97 1.81 400.3242 366.1295 334.5542 -1.95 1.80...
  • Page 29 Functions and control 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 62.3423 60.1906 58.0609 -0.95 0.94 59.9821 57.9770 55.9885 -0.92 0.92...
  • Page 30 Functions and control 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 14.5599 13.5942 12.6811 -2.36 2.23 14.1376 13.1879 12.2909 -2.41 2.27...

  • Page 31: Dimensional Drawings

    Dimensinal drawings 8.Dimensional drawings unit:mm 9.Center of gravity unit:mm Domestic air conditioner...

  • Page 32: 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.
  • Page 33 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.
  • Page 34 Service diagnosis 10.3 Error Codes and Description indoor display Code indication Indoor displaying panel code indication Outdoor Reference fault description (LED1 Page Only For 498 and flash 498A display Other times) (Red/Green Time Run display Indoor and Communication fault Outdoor between indoor Page .43...
  • Page 35 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...
  • Page 36 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...
  • Page 37 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...
  • Page 38 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...
  • Page 39 Service diagnosis Domestic air conditioner...
  • Page 40 Service diagnosis 10.3.5 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 Malfunction The system leads to IPM protection due to over current Decision The compressor faulty leads to IPM protection Conditions...
  • Page 41 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...
  • Page 42 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...
  • Page 43 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...
  • Page 44 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...
  • Page 45 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.
  • Page 46 Service diagnosis If the voltage is a constant value The indoor mainboard is of 0V DC to 5V DC.Or the voltage damaged; replace it with a between Communication line(red ) and N(white new one. line) is not close to18V DC when only indoor charged. Test the outdoor power is Check the cable supply 230VAC with a...
  • Page 47 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...
  • Page 48 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.
  • Page 49 Performance and curves diagrams 11.Performence and curves diagrams 11.1 Cooling capacity-temperature curves performance curves cooling value-temerature table outdoor temp. indoor temp. DB/WB 10℃ 15℃ 20℃ 25℃ 30℃ 35℃ 38℃ 40℃ 43℃ 1966 1943 1867 1799 2196 2433 2383 2242 2133 21/15℃...

  • Page 50: Performance And Curves Diagrams

    Performance and curves diagrams 11.2 Cooling power consumption value- temperature curves performance curves power consumption value-temp.table outdoor temp. indoor temp. DB/WB 10℃ 15℃ 20℃ 25℃ 30℃ 35℃ 38℃ 40℃ 43℃ 1025 21/15℃ 1059 24/16℃ 1056 1146 27/19℃ 30/22℃ 1093 1169 1012 1162 1252...
  • Page 51 Performance and curves diagrams 11.3 Cooling discharge pressure curves performance curves cooling discharge pressure.table outdoor temp. indoor temp. (humidity 46%) DB/WB 21/15℃ 27/19℃ 35/24℃ 10℃ 1875 1973 2092 15℃ 1895 1999 2109 20℃ 1974 2025 2094 25℃ 2030 2104 2224 30℃...
  • Page 52 Performance and curves diagrams 11.4 Cooling suction pressure curves performance curves cooling suction pressure.table outdoor temp. indoor temp. (humidity 46%) DB/WB 21/15℃ 27/19℃ 35/24℃ 10℃ 15℃ 20℃ 25℃ 30℃ 35℃ 38℃ 40℃ 1085 1247 1074 1171 1360 43℃ cooling suction pressure and temp.curves 1550 1350 21/15℃...
  • Page 53 Performance and curves diagrams 11.5 Heating capacity-temperature curves performance curves heating capacity and indoor/outdoor temp.table indoor temp.(humidity 46%) outdoor temp. DB/WB 10℃ 20℃ 27℃ -15℃ -10℃ -7/-8℃ 2/1℃ 7/6℃ 12/11℃ 18/16℃ 24/20℃ heating capacity and indoor/outdoor temp.curves 3500 3000 10℃ 2500 2000 20℃...
  • Page 54 Performance and curves diagrams 11.6 Heating power consumption value- temperature curves performance curves power consumption value-temp.table indoor temp.(humidity 46%) outdoor temp. DB/WB ℃ ℃ ℃ ℃ ℃ -7/-8 ℃ ℃ ℃ ℃ 12/11 18/16 ℃ 24/20 ℃ heating capacity and indoor/outdoor temp.curves 1200 1000 10℃...
  • Page 55 Performance and curves diagrams 11.7 Heating discharge pressure curves performance curves heating discharge pressure.table indoor temp. outdoor temp DB/WB 10℃ 20℃ 27℃ -15℃ -10℃ -7/-8℃ 2/1℃ 7/6℃ 12/11℃ 18/16℃ 24/20℃ heating discharge pressure and temp. curves 4000 3500 10℃ 3000 20℃...
  • Page 56 Performance and curves diagrams 11.8 Heating suction pressure curves performance curves heating suction pressure.table outdoor temp indoor temp. DB/WB 10℃ 20℃ 27℃ -15℃ -10℃ -7/-8℃ 2/1℃ 7/6℃ 12/11℃ 1014 1053 1073 18/16℃ 1200 1239 1259 24/20℃ heating suction pressure and temp. curves 1400 1300 1200...
  • Page 57 Circuit diagrams 12 Circuit diagram 12.1 Outdoor unit control board circuit diagrams AC-N OUT AC-L OUT Comment: CN14 CN15 CN16 四 通 阀 双 速 交 流 风 机 双 速 交 流 风 机 C COM FUSE1 PTC1 2U/450V 黑...

  • Page 58: Circuit Diagrams

    Circuit diagrams 10/0.5W 104/275V +15V 102/100V ER202 472/1KV 1K/1W 1K/1W 10/0.5W CN22 102/100V ER106 ER202 R33 100K 模 块 板 电 源 ( 蓝 ) 5.1K/1% 470U/25V R16 2/1W S/OCP D/ST D/ST EI22 102/50V STR-A6059H ER106 22U/50V 102/50V 5K/1% PC817A TL431C 104/50V 1.5K...
  • Page 59 Circuit diagrams 12.2 Module board circuit diagram 5.2MH/15A D207 FFA30U60DN PS21964-AT/AST/PS219A4-ASTX C404 AC-L C405 C406 IRGP20B60PDPBF 104/275V 680U/400V*2 104/275V 474/630V R215 D25BX60B 0.015/5W 0.02/5W AC-N R214 R222,R225 参数由压缩机退磁电流计算而定 R225 4.22K 9 10 11 12 13 14 15 16 17 D206 C023 R222 C413...
  • Page 60 REMOVAL PROCEDURE Wall Mounted Type DC Inverter FREE MATCH SERIES:35 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.
  • Page 61 Removal Procedure 1.Removal of Outdoor Panel...
  • Page 62 Removal Procedure c i t o i t...
  • Page 63 Removal Procedure Domestic Air Condition...
  • Page 64 Removal Procedure 2.Removal of Electrical Box...
  • Page 65 Removal Procedure 3.Removal of Fan and Fan Motor...
  • Page 66 Removal Procedure 4.Removal of Fan Motor Brcked and Partition...
  • Page 67 Removal Procedure Domestic Air Condition...
  • Page 68 Removal Procedure 5.Removal of Compressor and Heat Exchanger...
  • Page 69 Removal Procedure Domestic Air Condition...

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