GE GES-NX2G25IN Service Manual
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GE GES-NX2G25IN Service Manual

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This servic e informatio n is designed for experience d repai r technician s only and is not designe d for use by the genera l public.
It doe s not contai n warning s or caution s to advise non-technic al individu als of potentia l dangers in attemptin g to servic e a product.
Product s powered by electricit y shoul d 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 deal t with in this servic e infor mation by anyone else could result in seriou s injury or death
All manuals and user guides at all-guides.com
SE RVICE MANUAL
Wall Mounted Type
Model No.
WARNING
DC Inverter
GES-NX2G25IN
Version V1
Date 20180124

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Summary of Contents for GE GES-NX2G25IN

  • Page 1 Wall Mounted Type DC Inverter Model No. GES-NX2G25IN WARNING This servic e informatio n is designed for experience d repai r technician s only and is not designe d for use by the genera l public. It doe s not contai n warning s or caution s to advise non-technic al individu als of potentia l dangers in attemptin g to servic e a product.

  • Page 2: Table Of Contents

    All manuals and user guides at all-guides.com Table of contents Contents 1. Introduction .................... 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.

  • Page 3: Introduction

    All manuals and user guides at all-guides.com Introduction 1. Introduction 1.1 Model name explanation Indoor units 2500W Side closure Platform of indoor units: N (N platform) Split units Brand Domestic air conditioner...
  • Page 4 All manuals and user guides at all-guides.com 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.
  • Page 5 All manuals and user guides at all-guides.com 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.
  • Page 6 All manuals and user guides at all-guides.com 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.
  • Page 7 All manuals and user guides at all-guides.com Introduction Caution Installation of a leakage breaker is necessary in some cases depending on the conditions of the installation site, to prevent electrical shocks. Do not install the equipment in a place where there is a possibility of combustible gas leaks. If a combustible gas leaks and remains around the unit, it can cause a fire.
  • Page 8 All manuals and user guides at all-guides.com Introduction 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: Features

    All manuals and user guides at all-guides.com Features 2.Features Super quiet: Lower noise operation condition A-PAM DC inverter:With adoption of S-TYPE,S-PAM and PHASE control technology to works more stably at low-frequency,and is more energy-saving,mor powerful at high frequency. Long distance air supplying: Heating: When -15 can still heating natural heating maintenance:Heating Holding 10...

  • Page 10: Specifications

    All manuals and user guides at all-guides.com Specifications 3.Specifications NOMINAL DISTRIBUTION SYSTEM VOLTAGE a t l NOMINAL CAPACITY and NOMINAL INPUT n i l n i t 2.6（1.0-3.5） 2.8（1.0-4.4） Capacity rated Btu/h 9550（3420-15020） 8870（3400-11950） o i t 0.81 0.75 o i t ³...

  • Page 11: Sensors List

    All manuals and user guides at all-guides.com Specifications TECHNICAL SPECIFICATIONS-PARTS cooling heating o l f Air flow rate(high) m³/h 1000/850/700 Speed(Hi/Mid/Lo) 1100/950/80 0 Type ML fin- 7HI-HX tube Heat exchanger t i f o i t l a t Removable/Washable/Mildew Proof Air filter Microcomputer Control Temperature control...

  • Page 12: Piping Diagrams

    All manuals and user guides at all-guides.com Piping diagrams 5 Piping diagrams Domestic air conditioner...

  • Page 13: Printed Circuit Board Connector Wiring Diagram

    All manuals and user guides at all-guides.com Printed circuit board connector wiring diagram 6.Printed circuit board connector wiring diagram Connectors GES-NX2G25IN PCB(1) (Control PCB) For 1) CN9、CN8 Connector for fan motor and feedback 2) CN6 Connector for heat exchanger thermistor and Room temperature thermistor 3) CN11’...
  • Page 14 All manuals and user guides at all-guides.com Printed circuit board connector wiring diagram CN35 CN36 CN11’ CN12 CN31 CN18 CN23 CN17 CN21’ CN21 CON3 C0N1 ● Domestic air conditioner...
  • Page 15 All manuals and user guides at all-guides.com Printed circuit board connector wiring diagram 0010578987 Transformer C0N3 C0N1 C0N2 Fresh air Fan motor CN21 CN21＇ CN18 up-down stepmotor CN11 CN23 left stepmotor CN31 Right stepmotor CN12 CN35 WIFI CN17 Central controller CN48 EMERGENCY SWITCH CN36...

  • Page 16: Functions And Control

    All manuals and user guides at all-guides.com Functions and control 7.Funcitions and control 7.1 Main functions and control specification 7.1.1 Automatic operation When the running mode is turned to automation after starting the system, the system will first determine the running mode according to the current room temperature and then will run according to the determined mode.
  • Page 17 All manuals and user guides at all-guides.com Functions and control 7.1.3 Dehumidifying mode. * temperature control range: 16---30℃ * temperature difference: ±1℃ Control feature: send the dehumidifying signal to the outdoor system. When Tr>Ts+2℃, the compressor will be turned on, the indoor fan will operate at the set speed. When Tr is between the Ts and Ts+2℃, the outdoor system will operate at the high dehumidifying frequency for 10 minutes and then at the low dehumidifying mode for six minutes.
  • Page 18 All manuals and user guides at all-guides.com Functions and control If Tr<Ts-1℃, the outdoor system will be turned on again, the indoor fan will be at the cold air proof mode. *Indoor fan control manual control: You can choose high, medium, low and automatic speed control. Automatic: When Tr<Ts, high speed.
  • Page 19 All manuals and user guides at all-guides.com Functions and control Entering ‘mute’, you can have normal operation or signal control such as timing to finish the strength operation. When the system is at the automatic option with the strength/ mute function, if the system enters the cooling mode, the cooling strength/ mute function will be offered;...
  • Page 20 All manuals and user guides at all-guides.com Functions and control 2 centigrade after 1 hour’s operation and will fall 2 centigrade 1 hour later. 3 hours after the preceding operations, the set temperature will be raised for 1 centigrade and the system will keep this status for 3 hours and then close down.
  • Page 21 All manuals and user guides at all-guides.com Functions and control 7.1.12 High load protection control The outdoor system will be stopped if the coil temperature is above 65℃ for 2 minutes. The indoor fan will be controlled by the thermostat. The outdoor system can be restarted when the coil temperature is below 42℃...
  • Page 22 All manuals and user guides at all-guides.com Functions and control can be confirmed and reported and the outdoor system will be stopped. 7.1.16 Single indoor system operation * Enter condition: First, set the high speed airflow and 30 centigrade set temperature, then press the dormant keys for 6 times within 7 seconds, the system will feedback with 6 rings.
  • Page 23 All manuals and user guides at all-guides.com Functions and control R25℃=23KΩ+2% Temp.(℃) Resistor（KΩ） Temp.（℃） Resistor（KΩ） Temp.（℃） Resistor（KΩ） 266.905 32.215 250.866 30.671 5.87 235.895 29.21 5.65 221.911 27.828 5.44 208.838 26.521 5.24 196.609 25.283 5.04 185.163 24.111 4.86 174.443 4.68 164.399 21.94 4.51 154.983...
  • Page 24 All manuals and user guides at all-guides.com Functions and control R25℃=10KΩ±2% B25℃/50℃=3700K±2% Max.(KΩ) Normal(KΩ) Min.(KΩ) Temp.((℃)) Tolerance(℃) 165.2170 147.9497 132.3678 -1.94 1.75 155.5754 139.5600 125.0806 -1.93 1.74 146.5609 131.7022 118.2434 -1.91 1.73 138.1285 124.3392 111.8256 -1.89 1.71 130.2371 117.4366 105.7989 -1.87 1.70 122.8484...
  • Page 25 All manuals and user guides at all-guides.com Functions and control 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 16.6711 15.9601 15.2657 -1.01 0.99 15.9366 15.2770 14.6315...
  • Page 26 All manuals and user guides at all-guides.com Functions and control 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 3.0919 2.8922 2.7029...
  • Page 27 All manuals and user guides at all-guides.com Functions and control 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...

  • Page 28: Dimensional Drawings

    All manuals and user guides at all-guides.com Seivice diagnosis 8.Dimensional drawings unit:mm 9.Center of gravity unit:mm Domestic air conditioner...

  • Page 29: Service Diagnosis

    All manuals and user guides at all-guides.com 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.
  • Page 30 All manuals and user guides at all-guides.com 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...
  • Page 31 All manuals and user guides at all-guides.com 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...
  • Page 32 All manuals and user guides at all-guides.com 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...
  • Page 33 All manuals and user guides at all-guides.com 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...
  • Page 34 All manuals and user guides at all-guides.com 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...
  • Page 35 All manuals and user guides at all-guides.com Service diagnosis Check whether Terminal on the outdoor mainboard is well inserted. it is normal Reinsert the terminals Electrify the machine again and turn it on in The motor and the Cool state with the remote controller. outdoor pcb are check whether the motor could run.
  • Page 36 All manuals and user guides at all-guides.com 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 37 All manuals and user guides at all-guides.com 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.
  • Page 38 All manuals and user guides at all-guides.com 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...
  • Page 39 All manuals and user guides at all-guides.com 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...
  • Page 40 All manuals and user guides at all-guides.com 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...
  • Page 41 All manuals and user guides at all-guides.com 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.
  • Page 42 All manuals and user guides at all-guides.com 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.
  • Page 43 All manuals and user guides at all-guides.com 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...
  • Page 44 All manuals and user guides at all-guides.com 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...

  • Page 45: Circuit Diagrams

    All manuals and user guides at all-guides.com Circuit diagrams 11. Circuit Diagrams 0.1uF 1-3-MODE 1-6-RST 1-12-SCL 1-11-SDA 560Ω-0805 TJC8-04 IC4 CAT24C04-SOIC8 5267-04A CN35 0.01uF 1-48-COM2 KI1/AN9/P11 0.1uF S8B-PH-K-S 1-41-TXD 1-47-ROOM 100Ω-0805 R103 KI2/AN10/P12 1-40-RXD 100Ω-0805 P33/SSI 1-46-PIPE KI3/AN11/P13 P34/SDA/SCS 1-45-IR 100uF-16V-105 ℃...
  • Page 46 All manuals and user guides at all-guides.com Circuit diagrams 891WP-1A-C(AC220V-20A- 单刀单掷 ) 备注： 1. 没有特殊标示下电阻为 0603 封装，精度为 ±5 ％。 N500 2. 没有特殊标示下无极性电容为贴片 0603 封装，耐压 50V ，精度 ±20% 。 2SD1781KT146R 3. 没有特殊标示下电解电容为 85 ℃。 CN18 RLS4148 室内上电 R500 +12V CN18' 2-33-POWER_ON 4.7K R501 D250...
  • Page 47 All manuals and user guides at all-guides.com REMOVAL PROCEDURE Wall Mounted Type DC Inverter FREE MATCH N-Series SERIES:25N 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 48 All manuals and user guides at all-guides.com Removal Procedure Removal of front panel front panel Remove the foam cushion Loosen the screw Domestic Air Conditioner...
  • Page 49 All manuals and user guides at all-guides.com Removal Procedure Lift up the control box cover Loosen the screw Lift up the control box cover Domestic Air Conditioner...
  • Page 50 All manuals and user guides at all-guides.com Removal Procedure Remocal of front panel Pull the wires out of the control box and then release the pivots on both sides of the unit to remove the front panel. Remove the air filters Domestic Air Conditioner...
  • Page 51 All manuals and user guides at all-guides.com Removal Procedure Remove the casing three Domestic Air Conditioner...
  • Page 52 All manuals and user guides at all-guides.com Removal Procedure horizontal flap and the stepper motor flap Loosen the screws and remove the stepper motor Domestic Air Conditioner...
  • Page 53 All manuals and user guides at all-guides.com Removal Procedure horizontal louver and control box Every blade go round and round,then move Loosen the screws Domestic Air Conditioner...
  • Page 54 All manuals and user guides at all-guides.com Removal Procedure Loosen the hook and the service Cover Lift up the exchanger and remove it Domestic Air Conditioner...
  • Page 55 All manuals and user guides at all-guides.com Removal Procedure motor cover Domestic Air Conditioner...
  • Page 56 All manuals and user guides at all-guides.com Removal Procedure Domestic Air Conditioner...

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