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SERVICE MANAUL

Wall Mounted Type

Model No.

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

ON/OFF N-Series

MMT09CABWCCC8

MMT09CDBWCCC8

MMT12CDBWCCC8

MMT12CDBSCAM8

MMT12CDBWCAM8

MMT12CDBWLCAM8

MMT18CDBWCCC8

MMT18CDBSCAM8

MMT18CDBWCAM8

MMT12CABSCAM8

MMT12CABWCAM8

MMT12CABWLCAM8

MMT12HABSCAM8

MMT12CDBWLCCE8

MMT12HABWCAM8

MMT12HABWLCAM8

MMT12HDBSCAM8

MMT12HDBWCAM8

MMT12HDBWLCAM8

MMT18HDBSCAM8

MMT18HDBWCAM8

MMT24CDBSCAM8

MMT24CDBWCAM8

MMT24HDBSCAM8

MMT24HDBWCAM8

MMT36CDBWLCAM8

MMT36HDBWLCAM8

MMT24CDBWLCCE8

MMT12CDBSCCE8

MMT09CDBWLCAE8

Содержание MMT09CABWCCC8

Страница 1: ...ns 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 ON OFF N Series MMT09CABWCCC8 MMT09CDB...

Страница 2: ...Domestic air conditioner Contents 1 Introduction 1 2 Features 6 3 Sensors list 7 4 Pinping diagrams 8 5 Functions and control 9 6 Electrical Parts test 15 7 Service Diagnosis 18...

Страница 3: ...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 repair or inspe...

Страница 4: ...er 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 appropriate...

Страница 5: ...r 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 cable can d...

Страница 6: ...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 power outlet al...

Страница 7: ...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 attention...

Страница 8: ...design The panel is easy to wash and the airflow vents can be detached easily Child lock Avoid the child s wrong operation on the remote controller 3D air flow The 3D airflow is able to deliver the a...

Страница 9: ...s n e s m o o R Pipe sensor It s used for detecting temperature of evaporator 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...

Страница 10: ...Piping diagrams Domestic air conditioner 4 Pinping diagrams 8...

Страница 11: ...ording to the determined mode Tr in the following selection conditions means room temperature Ts means setting temperature Tp means temperature of indoor coil pipe a Tr 23 running cooling mode b Tr 23...

Страница 12: ...e through the remote controller and the machine can be shut down immediately Avoiding electrical shock outlet air is available 2 seconds later after startup High temperature expiration protection 1 Hi...

Страница 13: ...ressor must be started again 3 minutes later after shut down Avoiding electrical shock outlet air is available 2 seconds later after start up Timer on Timer off and sleep control are available Control...

Страница 14: ...ntized defrosting and others with sensor defrosts according to sensor defrosting Intelligentized defrosting 5 1 5 3 1 1 Indoor unit enter overload protection and air outlet stops when air outlet has b...

Страница 15: ...hronously the one which time is short run first Executing shutdown instruction clear timer and sleep function 5 1 6 3 Timer on and timer off can be set synchronously 5 1 7 Sleep function the timer ind...

Страница 16: ...ent cross peak expiration doesn t work Temperature control doesn t work Temperature expiration control doesn t work 5 1 10 memory function The memory function of power down is available and the auto r...

Страница 17: ...age between white wire and black pin is DC 15V The voltage between yellow pin and black pin is DC 0 6V The pulse voltage of DC fan motor is DC4 7V approx For the DC fan motor because the different str...

Страница 18: ...pansion valve For fixed frequency compressor Main Winding CR Aux Winding CS RRS RCR RCS RCR RCS RRS For DC inverter compressor RU V RU W RV W R1 4 48 4 R1 6 48 4 R2 3 48 4 R2 5 48 4 Electrical Parts t...

Страница 19: ...0 approx Red and Yellow is 200 300 approx Red and Purple is 200 300 approx Red and Blue is 200 300 approx If the resistance is not in this range or not same then the stepmotor is fault 2 Take out the...

Страница 20: ...fan motor or indoor PCB is fault please check and repair Check whether the temp difference between inlet air and outlet air is over 11 This is normal please help customer set the temp lower close the...

Страница 21: ...heck whether the outdoor compressor resistance is abnormal or big noise The compressor fault please replace a new one Yes No Check whether the indoor unit is out of level Repair the wall mount plate a...

Страница 22: ...ply Check to make sure that the rated voltage is supplied Check the indoor PCB Check to make sure that the indoor PCB is broken Equipment operates but does not cool or does not heat only for heat pump...

Страница 23: ...slightly in some models Supposed Faulty connector connection Causes Faulty thermistor Faulty PCB Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector or els...

Страница 24: ...to determine MCU Malfunction Detection Malfunction when the data of EEPROM is error or the EEPROM is damaged Decision Conditions Supposed Faulty EEPROM data Causes Faulty EEPROM Faulty PCB Troubleshoo...

Страница 25: ...aulty indoor unit PCB Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector or else parts damage may be occurred Check whether terminals on indoor pcb is well...

Страница 26: ...ronmental Temperature detected by PCB Tp is the current temperature 1 Tp1 Tp Real result 2 Centigrade and compressor keep running for 20mins 2 Tr Tp1 Real result 2 Centigrade and compressor keep runni...

Страница 27: ...ssor started Yes NO Yes Is if cooling mode NO Repair welding leakage points Add refrigerant Yes Is if solenoid valve open Is if there Refrigerant leak Yes NO FE failure eliminated 4 5000 Switching coo...

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