mabe N Series Service Manaul
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mabe N Series Service Manaul

Wall mounted type dc inverter
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Model No.
MMI12CABWCCC8
MMI12CABWCAM8
MMI12CAMCAM8
MMI09CDBWCCC8
MMI09CDMCCC8
MMI12CDBWCCC8
MMI12CDMCCC8
MMI12CDBWCCE8
MMI12CDBSCCE8
MMI18CDBWCCC8
MMI18CDMCCC8
MMI18CDBWCAM8
MMI18HDBWCAM8
MMI18HDMCAM8
MMI24HDBWCAM8
MMI12CADGCAM8
MMI12HADGCAM8
MMI12CDDGCAM8
MMI12HDDGCAM8
MMI12CABWCA6M8
MMI12CDBWCA6M8
MMI18CDBWCA6M8
MMI24CDBWCA6M8
MMI12CDBWCCM9
MMI24CDBWCCM8
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
SERVICE MANAUL
DC Inverter N-Series
MMI18CDMCAM8
MMI18CDBWCCE8
MMI24CDBWCCC8
MMI24CDBWCAM8
MMI24CDMCAM8
MMI24CDBWCCE8
MMI24CDBSCCE8
MMI24CDMCCC8
MMI12CDBWCAM8
MMI12CDMCAM8
MMI12HABWCAM8
MMI12HAMCAM8
MMI12HDBWCAM8
MMI12HDMCAM8
MMI24HDMCAM8
MMI18CDDGCAM8
MMI18HDDGCAM8
MMI24CDDGCAM8
MMI24HDDGCAM8
MMI12HABWCA6M8
MMI12HDBWCA6M8
MMI18HDBWCA6M8
MMI24HDBWCA6M8
MMI18CDBWCCM8
MMI12CDBWCCM9
WARNING
Wall Mounted Type

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  • Page 1 SERVICE MANAUL Wall Mounted Type DC Inverter N-Series Model No. MMI12CABWCCC8 MMI18CDMCAM8 MMI12CABWCAM8 MMI18CDBWCCE8 MMI12CAMCAM8 MMI24CDBWCCC8 MMI09CDBWCCC8 MMI24CDBWCAM8 MMI09CDMCCC8 MMI24CDMCAM8 MMI12CDBWCCC8 MMI24CDBWCCE8 MMI12CDMCCC8 MMI24CDBSCCE8 MMI12CDBWCCE8 MMI24CDMCCC8 MMI12CDBSCCE8 MMI12CDBWCAM8 MMI18CDBWCCC8 MMI12CDMCAM8 MMI18CDMCCC8 MMI12HABWCAM8 MMI18CDBWCAM8 MMI12HAMCAM8 MMI18HDBWCAM8 MMI12HDBWCAM8 MMI18HDMCAM8 MMI12HDMCAM8 MMI24HDBWCAM8 MMI24HDMCAM8 MMI18CDDGCAM8 MMI12CADGCAM8 MMI18HDDGCAM8...
  • Page 2 Model No. MMI18CDBWCCM8 MMI24CDBWCCM8 MMI12CABWCA6MC8 MMI12HABWCA6MC8 MMI12HDBWCA6MC8 MMI12CDBWCA6MC8 MMI18CDBWCA6MC8 MMI24CDBWCA6MC8 MMI18HDBWCA6MC8 MMI24HDBWCA6MC8 MMI12CABWCAM9 MMI12HABWCAM9 MMI12CDBWCAM9 MMI12HDBWCAM9 MMI18CDBWCAM8 MMI18HDBWCAM8 MMI24HDBWCAM8 MMI24HDBWCAM8 MMI24CDMCCC8 MMI12CABWCC6M8 MMI12CDBWCC6M8 MMI18CDBWCC6M8 MMI24CDBWCC6M8 MMI12CDMCCM9 MMI18CDMCCM8 MMI24CDMCCM8 MMI12HAMCAM9 MMI12HDBWCAM9 MMI18HDMCAM9 MMI24HDBWCAM9...

  • Page 3: Table Of Contents

    Table for contents Contents 1. Introduction .....................1 2. Features ....................6 3. Sensors list.................... 7 4. Piping diagrams ..................8 5. Operation range..................9 6. Functions and Control ................10 7.Electrical Parts test.................24 8. Service Diagnosis .................. 9. Route on/off...................47 Domestic air conditioner...

  • Page 4: Introduction

    Intuoduction 1 Introduction 1.  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 Intuoduction 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 Intuoduction 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.
  • Page 7 Intuoduction 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 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. If the installation platform or frame has corroded, replace it.

  • Page 9: Features

    Specifications 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:12 m+ air supply Heating: When -15 can still heating natural heating maintenance:Heating Holding 10 temperature...

  • Page 10: Sensors List

    Specifications 3 Sensors list 3.1 Indoor unit type Description s ’ t n i t Pipe sensor It’s used for detecting temperature of evaporator 3.2 Outdoor unit type Description i t c Its used for detecting suction pipe temperature of compressor to Suction sensor adjust gas flowing Defrosting sensor...

  • Page 11: Piping Diagrams

    Piping diagrams  Pinping diagrams Domestic air conditioner...

  • Page 12: Operation Range

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

  • Page 13: Functions And Control

    Functions and Control  .Funcitions and Control 6.1 Main functions and control specification indoor unit 6.1.1 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. Tr in the following selection conditions means room temperature, Ts means setting temperature, Tp means temperature of indoor coil pipe Tr 23...
  • Page 14 Functions and Control 6.1.3 Dehumidifying mode. * temperature control range: 16---30 * temperature difference: 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 15 Functions and Control *Indoor fan control manual control: You can choose high, medium, low and automatic speed control. Automatic: When Tr<Ts, high speed. When Ts Tr Ts+2 , medium speed. When Tr> Ts+2 , low speed. When the airflow speed has no delay from the high to low switching, the speed should be delayed for 3 minutes (remain at high speed for 3 minutes.) before the next switch.
  • Page 16 Functions and Control 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; if the system enters the heating mode, then the heating strength/ mute function will be offered;...
  • Page 17 Functions and Control and then close down. 2.3 During the dormant time, except the change of the system mode or a new press on the dormant setting keys, the timing of the 8 hours dormancy will take the first timing as the start time, any presses on other keys will not affect the original timing.
  • Page 18 Functions and Control controlled by the thermostat. The outdoor system can be restarted when the coil temperature is below 42 and the system has been stopped for 3 minutes. The malfunction will be stored in the malfunction resume and will not be revealed. 6.1.13 Abnormal operation of indoor system When the outdoor system operates, if the indoor system operation differs from the outdoor system, the abnormal operation malfunction will be reported.
  • Page 19 Functions and Control keys for 6 times within 7 seconds, the system will feedback with 6 rings. * After the system enters the separate indoor system operation mode, the indoor system will operate according to the set mode and neglect the communication signals of the outdoor system. However, it has to send signals to the outdoor system.
  • Page 20 Functions and control 6.1.20 Time cutting function: Connect the test program terminal on the mainboard after connecting the system to the power circuit. The CPU of the main control will be 60 times faster. 6.2 Main functions and control specification outdoor unit 6.2.1 The operation frequency of outdoor unit and its control 6.2.1.1 The operation frequency control of compressor The operation frequency scope of compressor...
  • Page 21 Functions and control Refrigeration/dehumidification mode:: Serial No. Temperature scope Frequency limitation < < < < Max_hz5 60 HZ Wh_c 50 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. When the starting ability is not the maximum, its maximum frequency limitation is calculated by the following equations: The frequency limitation which is affected by the temperature and under the condition of actual ability the actural running system ability*the maximum frequency which is limited by the temperature and under the...
  • Page 22 Functions and control The temperature of the The temperature of the outdoor Airflow speed outdoor air coil Te Ta 30 — — Ta<30 — — — — Ta<26 Ta<24 — — Ta<23 — — Ta<10 — — Ta<5 15 >Te Stop 6.2.2.2 The outdoor fan control when heating The temperature of the outdoor...
  • Page 23 Functions and control 6.2.5 Protection function 6.2.5.1 TTC high temperature-preventing protection Once the machine is started, it can run TTC overheating protection of air-blowing, but air-blowing sensor malfunction must alarm after 4 minutes during which the compressor is started (during the course of self-detection, there’s no such limitation) Sensor detection methods: 100 times (one cycle of procedure run is one time, and about 5ms, detection method for each time: continuously sampling for 8 times, then order them and take the mean value of the...
  • Page 24 Functions and control Remarks: the outdoor unit 6.2.5.3 The control of preventing the overcurrent of the compressor During the starting process of the compressor, if the current of the compressor is greater than 15A for 3 seconds, stop the compressor and alarm, after 3 minutes, start it again, if such state appears 3 times in 20 minutes, stop the compressor and alarm, and confirm the malfunction.
  • Page 25 Functions and control When Tpg_indoor begins to rise again, and ice_temp_2 Tpg_indoor ice_temp_3 , the frequency of thecompressor doesn’t change. When ice_temp_3 Tpg_indoor ice_temp_4 , the frequency of the compressor increases at the speed of 1HZ/10seconds. For example, Tpg_indoor 0 last for 2 minutes, and then the outdoor unit will stop, and report underload malfunction, but don’t send malfunction report to the indoor.
  • Page 26 Functions and control Frost-removing temperature sensor failure Ambient temperature sensor failure Exhaust temperature sensor failure Compressor suction protection Communication fault between indoor and outdoor units deviate from the normal for the compressor Loop of the station detect error High work-intense protection Overcurrent of the compressor Overcurrent protection for single-phase of the compressor Module chip reset...

  • Page 27: Electrical Parts Test

    Electrical Parts test Domestic air conditioner...
  • Page 28 Domestic air conditioner...
  • Page 29 Domestic air conditioner...
  • Page 30 Electrical Parts test Domestic air conditioner...
  • Page 31 Seivice diagnosis Domestic air conditioner...
  • Page 32 Seivice diagnosis Domestic air conditioner...

  • Page 33: Service Diagnosis

    8.3 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 34 Seivice diagnosis 8.5 Error Codes and Description indoor display Code indication Indoor Reference Outdoor fault description displaying Page (LED1 flash panel code times) indication Indoor and Communication fault between indoor and Page . Outdoor outdoor units Room temperature sensor failure Page .
  • Page 35 Seivice diagnosis 8.5. 1 Thermistor or Related Abnormality E1: Room temperature sensor failure Indoor display E2: Heat-exchange sensor failure LED1 flash 10 times Defrost temperature sensor failure LED1 flash 11 times Suction temperature sensor failure Outdoor display LED1 flash 12 times Ambient temperature sensor failure LED1 flash 13 times Discharge temperature sensor failure LED1 flash 14 times Discharge temperature sensor failure The temperatures detected by the thermistors are used to determine thermistor errors...
  • Page 36 Seivice diagnosis 8.5.2 EEPROM abnormal Indoor Display E4: indoor EEPROM error outdoor 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 detection conditions Faulty EEPROM data...
  • Page 37 Seivice diagnosis 8.5.3 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 when the detected rotation feedback singal don’t receiced in 2 minutes Malfunction Decision Conditions...
  • Page 38 Seivice diagnosis Turn off power supply and rotate fan by hand Does fan rotate Replace fan motor smoothly? Turn power ON and operate fan Turn off power supply and disconnect fan Does it rotate? motor connector, then turn power ON Check output of fan motor connector Is motor power voltage DC310V...
  • Page 39 Seivice diagnosis 8.5.4 Outdoor DC fan motor fault Outdoor diplay LED1 flash 9 times Method of DC fan motor is detected by checking the fan running condition and so on malfunction detection Malfunction detection when the data of EEPROM is error or the EEPROM is damaged conditions DC fan motor protection dues to the DC fan motor faulty Supposed causes...
  • Page 40 Seivice diagnosis 8.5.5 IPM protection Outdoor diplay LED1 flash 2 times Method of malfunction IPM protection is detected by checking the compressor running condition and so on detection The system leads to IPM protection due to over current Malfunction The compressor faulty leads to IPM protection detection conditions circuit component of IPM is broken and led to IPM protection...
  • Page 41 Seivice diagnosis 8.5.6 Over-current of the compressor LED1 flash 3 or 24 or 25 times Outdoor diplay Method of he current of the compressor is too high malfunction detection when the IPM Module is damaged or the compressor is damaged. power supply Malfunction detection voltage is too low or too high...
  • Page 42 Seivice diagnosis 8.8.7 The communication fault between IPM and outdoor PCB Outdoor diplay LED1 flash 4 times Method of Communication is detected by checking the IPM module and the outdoor PCB malfunction detection The outdoor PCB broken leads to communication fault Malfunction detection The IPM module broken leads to communication fault conditions...
  • Page 43 Seivice diagnosis 8.5.8 Power Supply Over or under voltage fault LED1 flash 6 times The power supply is over voltage Outdoor diplay LED1 flash 7 times The power supply voltage is too low instantly Method of An abnormal voltage rise or fall is detected by checking the specified voltage detection malfunction detection An voltage signal is fed from the voltage detection circuit to the microcomputer Malfunction detection...
  • Page 44 Seivice diagnosis 8.5.9 Overheat Protection For Discharge Temperature LED1 flash 8 times Outdoor diplay Method of The Discharge temperature control is checked with the temperature being detected by malfunction detection the Discharge pipe thermistor Malfunction detection when the compressor discharge temperature is above 110 conditions Electronic expansion valve defective Supposed causes...
  • Page 45 Seivice diagnosis 8.5.10 The communication fault between indoor and outdoor indoor diplay Outdoor diplay LED1 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 detection The indoor PCB broken leads to communication fault conditions...
  • Page 46 Seivice 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...
  • Page 47 Circuit diagrams 8.5.11 Loss of synchronism detection Inverter side current detection is abnormal Outdoor diplay LED1 flash 18 times LED1 flash 19 times Method of The position of the compressor rotor can not detected normally malfunction detection when the wiring of compressor is wrong or the connection is poor; or the compressor Malfunction detection is damaged conditions...
  • Page 48 Circuit diagrams 8.5.12 High work-intense protection Outdoor diplay LED1 flash 5 or 21 times Method of High work-intense control is activated in the heating mode if the temperature being malfunction detection sensed by the heat exchanger thermistor exceeds the limit. Activated when the temperature being sensed by the heat exchanger rises above Malfunction detection twice in 30 minutes.
  • Page 49 Circuit diagrams 8.5.13 Module chip reset Outdoor diplay LED1 flash 26 times Method of Outdoor module board chip reset malfunction detection Malfunction detection The module board chip is interfered or the main chip is broken conditions Outside interference Supposed causes Module chip * Caution Troubleshooting...

  • Page 50: Route On/Off

    Route on/off 9.Route on/off Model Display Notes: 1.When you change the indoor PCB,you might need to cut the jumper,depends the model.The old (faulty) PCB can be your reference. 2."ON" means the jumper is connected, "OFF" means we need to cut the jumper. Customer Model Display PCB Route on/off...
  • Page 51 Route on/off MMI24CDBWCAMI8 0011800742 3 5码 J3 OFF J4 OFF 387 J1 ON J2 ON MMI24HDBWCAMI8 0011800744 387 J1 ON J2 ON 26码 J3 ON J4 OFF MMI18CDMCAMI8 NJ Dark Grey 0011800742 26码 J3 ON J4 OFF 317 J1 OFF J2 OFF MMI18HDMCAMI8 NJ Dark Grey 0011800744 23码...
  • Page 52 Route on/off MMI12CABWCA6MI8 0011800612H 387 J1 ON J2 ON SW2 3 OFF 4 OFF MMI12HABWCA6MI8 0011800612H SW2 3 ON 4 OFF 387 J1 ON J2 ON MMI12CDBWCA6MI8 0011800612R SW2 3 OFF 4 OFF 387 J1 ON J2 ON SW2 3 ON 4 OFF 387 J1 ON J2 ON MMI12HDBWCA6MI8 0011800612R...
  • Page 53 Route on/off MMI24CDBWCAMI9 0011800742A 387 J1 ON J2 ON J3 OFF 4 OFF MMI24HDBWCAMI9 0011800742A J3 OFF 4 ON 387 J1 ON J2 ON Domestic air conditioner...
  • Page 54 Route on/off DIP switch(3、4):Please set according to model,if necessary.Top is “ON” and bottom is “OFF”. Domestic air conditioner...

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Mmi18cdmcam8Mmi18cdbwcce8Mmi24cdbwccc8Mmi24cdbwcam8Mmi24cdmcam8Mmi24cdbwcce8 ... Show all

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