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SERVICE MANAUL

Wall Mounted Type

MMI18CDMCAM8

MMI18CDBWCCE8

MMI24CDBWCCC8

MMI24CDBWCAM8

MMI24CDMCAM8

MMI24CDBWCCE8

MMI24CDBSCCE8

MMI24CDMCCC8

MMI12CDBWCAM8

MMI12CDMCAM8

MMI12HABWCAM8

MMI12HAMCAM8

MMI12HDBWCAM8

MMI12HDMCAM8

MMI24HDMCAM8

MMI12CABWCCC8

MMI12CABWCAM8

MMI12CAMCAM8

MMI09CDBWCCC8

MMI09CDMCCC8

MMI12CDBWCCC8

MMI12CDMCCC8

MMI12CDBWCCE8

MMI12CDBSCCE8

MMI18CDBWCCC8

MMI18CDMCCC8

MMI18CDBWCAM8

MMI18HDBWCAM8

MMI18HDMCAM8

MMI24HDBWCAM8

Model No.

DC Inverter N-Series

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

WARNING

MMI12CADGCAM8

MMI12HADGCAM8

MMI12CDDGCAM8

MMI12HDDGCAM8

MMI18CDDGCAM8

MMI18HDDGCAM8

MMI24CDDGCAM8

MMI24HDDGCAM8

MMI12CABWCA6M8

MMI12HABWCA6M8

MMI12CDBWCA6M8

MMI12HDBWCA6M8

MMI18CDBWCA6M8

MMI18HDBWCA6M8

MMI24CDBWCA6M8

MMI24HDBWCA6M8

MMI12CDBWCCM9

MMI18CDBWCCM8

MMI24CDBWCCM8

MMI12CDBWCCM9

Содержание N Series

Страница 1: ...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 pow...

Страница 2: ...4CDBWCA6MC8 MMI18HDBWCA6MC8 MMI24HDBWCA6MC8 MMI12CABWCAM9 MMI12HABWCAM9 MMI12CDBWCAM9 MMI12HDBWCAM9 MMI18CDBWCAM8 MMI18HDBWCAM8 MMI24HDBWCAM8 MMI24HDBWCAM8 MMI24CDMCCC8 MMI12CABWCC6M8 MMI12CDBWCC6M8 M...

Страница 3: ...itioner 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 30 9 Route on off 47 T...

Страница 4: ...ssembling the equipment for a repair Working on the equipment that is connected to a power supply can cause an electrical shook If it is necessary to supply power to the equipment to conduct the repai...

Страница 5: ...ng the welder in an enclosed room can cause oxygen deficiency 1 1 2 Cautions Regarding Products after Repair Warning Be sure to use parts listed in the service parts list of the applicable model and a...

Страница 6: ...eneration or fire Do not damage or modify the power cable Damaged or modified power cable can cause an electrical shock or fire Placing heavy items on the power cable and heating or pulling the power...

Страница 7: ...perly water can enter the room and wet the furniture and floor 1 1 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 powe...

Страница 8: ...Be sure to check the drainage of the indoor unit after the repair Faulty drainage can cause the water to enter the room and wet the furniture and floor 1 1 4 Using Icons Icons are used to attract the...

Страница 9: ...ed to a more comfortable level when you set the sleep mode during night sleep Super match One outdoor unit can match two or more indoor unit DIY auto mode Adjust the last fixed operation mode automati...

Страница 10: ...orator 1 type Description Qty 1 i t c e t e d r o f d e s u s t I r o s n e s t n e i b m A e d i s r o o d t u o f o e r u t a r e p m e t g n Suction sensor Its used for detecting suction pipe tempe...

Страница 11: ...Piping diagrams Domestic air conditioner Pinping diagrams 8...

Страница 12: ...Operation range Domestic air conditioner 18 15 27 24 9 5 Operation range...

Страница 13: ...opened the indoor fan will operate at the set speed and the mode signal will be sent to the outdoor system The system will keep the original status if Tr Ts Airflow speed control temperature differen...

Страница 14: ...off or Tr Ts 3 the manual operation can not be made obligatory automatic operation Airgate location control the location for the airgate can be set according to your needs Defrosting function preventi...

Страница 15: ...gnals to the outdoor system Residue heat sending The indoor fan will send the residue heat at a low speed for 12 seconds If other conditions are satisfied when the compressor stops the indoor system w...

Страница 16: ...Also the light will be turning off after the timing is finished The followings are several timing methods The timing indicator will be lightened and the indoor system is under the waiting mode The li...

Страница 17: ...e remote control signal if the press on the urgency key doesn t last for 15 seconds or if the key is loosened Urgency operation If you press the urgency key for less than 5 seconds the buzzer will rin...

Страница 18: ...y confirmation approaches 1 indoor temperature sensor abnormality Under the operation the normal temperature ranges from 120 degree to 30 degree When the temperature goes beyond this range the abnorma...

Страница 19: ...on 1 and send the cooling signal to the outdoor system Meanwhile you can fix the indoor system at high speed mode the location of the airflow direction board can be switched to the maximal position c...

Страница 20: ...ined frequency for protection should be prior to the calculated frequency The speed of increasing or decreasing the frequency rapidly 1 1HZ second The speed of increasing or decreasing the frequency s...

Страница 21: ...low speed K healthy airflow When refrigerating it is needed to satisfy IN F When heating it is needed to satisfy IN r F r 6 2 2 The outdoor fan control exchange fan When the fan is changed among every...

Страница 22: ...steps When the outdoor unit is shut down the valve is opened completely for 2 minutes and then begin initialization The scope of refrigerationg valve 90 480 steps The scope of heating valve 60 480 ste...

Страница 23: ...ction of air blowing alarm malfunction to the indoor others don t last 6 2 5 2 TC high temperature preventing control of the indoor heating unit Tpg_indoor is the highest value of the effective indoor...

Страница 24: ...decreases at the speed of 1HZ second During the starting process of the compressor if the AC current is greater than 11A the frequency of the compressor decreases at the speed of 0 1HZ second During t...

Страница 25: ...ion with the outdoor unit the light of the outdoor unit will flash and its frequency is 1HZ the number of times is according to the table when a round of flashing is finished the light shoud be off fo...

Страница 26: ...lt between indoor and outdoor units F11 18 deviate from the normal for the compressor 19 Loop of the station detect error E9 21 High work intense protection 24 Overcurrent of the compressor 25 Overcur...

Страница 27: ...Domestic air conditioner 24 Electrical Parts test...

Страница 28: ...Domestic air conditioner 25...

Страница 29: ...Domestic air conditioner 26...

Страница 30: ...Domestic air conditioner 27 Electrical Parts test...

Страница 31: ...Domestic air conditioner Seivice diagnosis...

Страница 32: ...Domestic air conditioner Seivice diagnosis...

Страница 33: ...ure that the indoor PCB is broken Operation sometimes stops Check the power supply A power failure of 2 to 10 cycles can stop air conditioner operation Equipment operates but does not cool or does not...

Страница 34: ...too high or low Page F4 8 Overheat protection for Discharge temperature Page F8 9 Outdoor DC fan motor fault F21 10 Defrost temperature sensor failure Page F7 11 Suction temperature sensor failure Pag...

Страница 35: ...hip between normal temperature and resistance is shown in the value of indoor thermistor Method of malfunction tection Malfunction detection conditions Thermistor resistance check Yes Troubleshooting...

Страница 36: ...n detection conditions Supposed causes Troubleshooting The Data detected by the EEPROM are used to determine MCU when the data of EEPROM is error or the EEPROM is damaged Faulty EEPROM data Faulty EEP...

Страница 37: ...r Causes Fan motor overheat protection Operation halt due to breaking of the fan motor lead wires Detection error due to faulty indoor unit PCB Troubleshooting Caution Be sure to turn off power switch...

Страница 38: ...nit PCB Replace indoor fan motor PCB NO Replace indoor unit PCB Is motor control power voltage DC15V generated NO Does fan rotate smoothly NO Turn power ON and operate fan Does it rotate Yes Turn off...

Страница 39: ...e mainboard about DC310V Measure the voltage between 3 and 4 of the terminal about DC15V Measure the voltage between 5 and 3 of the terminal about 1 6v NO Is it normal The mainboard of the outdoor uni...

Страница 40: ...ctions are reported after it has run for some time Malfunction unsolved Method of malfunction detection Malfunction detection conditions Troubleshooting IPM protection is detected by checking the comp...

Страница 41: ...S NO Yes NO The compressor is started normally but malfunctions are reported after it has run for some time Check the power supply is too low or too high NO Method of malfunction detection Malfunction...

Страница 42: ...nboard with a new one Replace the outdoor IPM module with a new one YES NO NO YES Malfunction unsolved 1 Pull out and reinsert the terminals 2 Replace connected wire Method of malfunction detection Ma...

Страница 43: ...check whether the power is 150 V or 390V Method of malfunction detection Malfunction detection conditions Troubleshooting An abnormal voltage rise or fall is detected by checking the specified voltag...

Страница 44: ...ure is below 110 Pull out the exhaust sensor and measure its resistance at standard temperatures according to the resistance temperature table the results deviate much The sensor is damaged Replace th...

Страница 45: ...edust 1 Reconnect the linking cable 2 Replace the linking cable with new one Method of malfunction detection Malfunction detection conditions Troubleshooting Communication is detected by checking the...

Страница 46: ...oor unit with a multimeter If 230VAC is available but 310DC not the power module is damaged replace it with a new one Test the outdoor power supply 230VAC and 310VDC with a multimeter The outdoor main...

Страница 47: ...mes IPM Module is damaged and needs replacing the Malfunctions exist also the compressor is damaged replace a new one YES NO YES Malfunction unsolved Maybe there is some disturbance Method of malfunct...

Страница 48: ...Reinstall the fan Use some tools to measure the pressure of system YES NO YES NO Method of malfunction detection Malfunction detection conditions Troubleshooting High work intense control is activated...

Страница 49: ...e to remove the fault Replace outdoor module PCB YES NO Method of malfunction detection Malfunction detection conditions Troubleshooting Supposed causes Caution LED1 flash 26 times Outdoor diplay 46 O...

Страница 50: ...2HABWCAMI8 NM 0011800491J 32 J1 ON J2 OFF 387 J3 OFF J4 OFF MMT12HDBWCAMI8 NM 0011800323K 26 J4 ON J8 OFF 387 J11 ON J33 ON MMT18CDBWCAMI8 NM 0011800323W 23 J4 ON J8 ON 387 J11 ON J33 ON MMT18HDBWCAMI...

Страница 51: ...1800743B 35 J3 OFF J4 OFF 387 J1 ON J2 ON MMI12CDBWCAMI9 NM 0011800743C 33 J3 OFF J4 ON 387 J1 ON J2 ON MMI12HDBWCAMI9 NM 0011800743C 35 J3 OFF J4 OFF 387 J1 ON J2 ON MMI12CAMCAMI9 NJ Dark Grey 001180...

Страница 52: ...ON 0011800613K 33 SW2 3 OFF 4 ON 387 J1 ON J2 ON 0011800613K 22 SW2 3 ON 4 ON 387 J1 ON J2 ON MMI12CABWCAMI9 MMI12HABWCAMI9 MMI12CDBWCAMI9 MMI12HDBWCAMI9 MMI18CDBWCAMI8 MMI18HDBWCAMI8 MMI24HDBWCAMI8...

Страница 53: ...Route on off Domestic air conditioner 49 MMI24CDBWCAMI9 NM 0011800742A 35 J3 OFF 4 OFF 387 J1 ON J2 ON NM 387 J1 ON J2 ON 33 J3 OFF 4 ON 0011800742A MMI24HDBWCAMI9...

Страница 54: ...Route on off Domestic air conditioner 50 DIP switch 3 4 Please set according to model if necessary Top is ON and bottom is OFF...

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