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Midea NEOLA ON-OFF, Service Manual

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Midea NEOLA ON-OFF Service Manual Download Page 28

 

 

26 

If the system has been charged with liquid refrigerant while operating the air conditioner, turn off the air 

conditioner before disconnecting the hose. 

6). Mounted the valve stem caps and the service port 

Use torque wrench to tighten the service port cap to a torque of 18N.m. 

Be sure to check for gas leakage 

Summary of Contents for NEOLA ON-OFF

Page 1: ...NEOLA ON OFF SERIES Service Manual 2012 11DSEU B 1202 ...

Page 2: ... 6 3 Pipe length and the elevation 17 6 4 Installation for the first time 18 6 5 Adding the refrigerant after running the system for many years 21 6 6 Re installation while the indoor unit need to be repaired 22 6 7 Re installation while the outdoor unit need to be repaired 24 7 Operation characteristics 27 8 Electronic function 28 8 1 Abbreviation 28 8 2 Display function 28 8 3 Main Protection 29...

Page 3: ...ble or repair the product there is risk of fire or electric shock Always ground the product There is risk of fire or electric shock Install the panel and the cover of control box securely There is risk of fire of electric shock Always install a dedicated circuit and breaker Improper wiring or installation may cause fore or electric shock Use the correctly rated breaker of fuse There is risk of fir...

Page 4: ...during operation There is risk of fire or electric shock Do not place anything on the power cable There is risk of fire or electric shock Do not plug or unplug the power supply plug during operation There is risk of fire or electric shock Do not touch operation the product with wet hands There is risk of fire or electric shock Do not place a heater or other appliance near the power cable There is ...

Page 5: ...tion that water could not enter the product There is risk of fire electric shock or product damage Ventilate the product from time to time when operating it together with a stove etc There is risk of fire or electric shock Turn the main power off when cleaning or maintaining the product There is risk of electric shock When the product is not be used for a long time disconnect the power supply plug...

Page 6: ... preserving foods works of art etc It is a consumer air conditioner not a precision refrigerant system There is risk of damage or loss of property Do not block the inlet or outlet of air flow It may cause product failure Use a soft cloth to clean Do not use harsh detergents solvents etc There is risk of fire electric shock or damage to the plastic parts of the product Do not touch the metal parts ...

Page 7: ...nes of the same type Do not mix old and mew batteries or different types of batteries There is risk of fire or explosion Do not recharge or disassemble the batteries Do not dispose of batteries in a fire They may burn of explode If the liquid from the batteries gets onto your skin or clothes wash it well with clean water Do not use the remote of the batteries have leaked The chemical in batteries ...

Page 8: ... QB6 MOK 09HN1 QB6 MS11D 09HRN1 QC2 2T0032300727 MOA2 09HN1 QC2 MS11D 09HRN1 QC2 2T0032300764 MOA2 09HN1 QC2 12k MS11D 12HRN1 QB6 MOA2 12HN1 QB6 MS11D 12HRN1 QC2 2T0032400199 MOB4 12HN1 QC2 MS11D 12HRN1 QC2 2T0032400212 MOB 11HN1 QC2 18k MS11D 18HRN1 QB6 MOB 18HN1 QB6 MS11D 18HRN1 QB8 MOC 18HN1 QB8 21k MS11D 21HRN1 QB6W MOC 21HN1 QB6W MS11D 21HRN1 QB8W MOP 21HN1 QB8W 24k MS11D 24HRN1 QB6W MOP 24HN...

Page 9: ...er O Killer Of Formaldehyde Compressor Crankcase Heater O Golden Fin O Self Clean O Louver Position Memory Function Refrigerant Leakage Detect Self diag Function Hydrophilic Aluminum Fin Anti rust Cabinet Valve Protection Cover PTC Heating Belt O Follow Me O 0 5W Standby O O optional function ...

Page 10: ...HRN1 QC2 MS11D 09HRN1 QB6 680 178 255 MS11D 09HRN1 QC2 2T0032300727 MS11D 12HRN1 QB6 770 188 255 MS11D 12HRN1 QC2 MS11D 09HRN1 QC2 2T0032300764 MS11D 18HRN1 QB6 905 198 275 MS11D 18HRN1 QB8 MS11D 21HRN1 QB6W 1030 218 315 MS11D 21HRN1 QB8W MS11D 24HRN1 QB6W 1030 218 315 MS11D 24HRN1 QB8W ...

Page 11: ...MS11D 09HRN1 QB6 MS11D 09HRN1 QC2 2T0032300727 MS11D 12HRN1 QB6 95 170 45 MS11D 12HRN1 QC2 MS11D 09HRN1 QC2 2T0032300764 MS11D 18HRN1 QB6 80 100 45 MS11D 18HRN1 QB8 Model R mm L mm H mm Dimension of installation hole mm MS11D 21HRN1 QB6W 163 293 45 65 MS11D 21HRN1 QB8W MS11D 24HRN1 QB6W MS11D 24HRN1 QB8W H L R ...

Page 12: ...07HN1 QB6 685 260 430 742 460 276 MOK3 07HN1 QC2 MOK 09HN1 QB6 MOA2 09HN1 QC2 700 240 540 757 458 250 MOA2 12HN1 QB6 MOB 11HN1 QC2 780 250 540 843 549 276 MOB4 12HN1 QC2 780 250 540 843 549 276 MOB 18HN1 QB6 MOC 18HN1 QB8 760 285 590 823 530 290 MOC 21HN1 QB6W MOP 21HN1 QB8W 820 330 595 870 523 340 MOP 24HN1 QB6W MOF2 24HN1 QB8W 845 320 700 908 560 335 ...

Page 13: ...m INDOOR OUTDOOR LIQUID SIDE GAS SIDE HEAT EXCHANGE EVAPORATOR HEAT EXCHANGE CONDENSER COMPRESSOR 2 WAY VALVE 3 WAY VALVE CHECK VALVE Heating Model only CAPILIARY TUBE REVERSING VALVE Heating Model only COOLING HEATING ACCUMULATOR ...

Page 14: ...12 5 Wiring Diagram 5 1 Indoor Units MS11D 07HRN1 QB6 MS11D 07HRN1 QC2 MS11D 09HRN1 QB6 MS11D 09HRN1 QC2 MS11D 12HRN1 QB6 MS11D 12HRN1 QC2 MS11D 18HRN1 QB6 MS11D 18HRN1 QB8 ...

Page 15: ...13 MS11D 21HRN1 QB6W MS11D 21HRN1 QB8 MS11D 24HRN1 QB6W MS11D 24HRN1 QB8W ...

Page 16: ...14 5 2 Outdoor Units MOK 07HN1 QB6 MOK3 07HN1 QC2 MOK 09HN1 QB6 MOA2 09HN1 QC2 MOA2 12HN1 QB6 MOB4 12HN1 QC2 MOB 18HN1 QB6 MOB 11HN1 QC2 MOC 18HN1 QB8 ...

Page 17: ...15 MOC 21HN1 QB6W MOP 21HN1 QB8W MOP 24HN1 QB6W MOF2 24HN1 QB8W ...

Page 18: ... Connecting the cables The power cord of connect should be selected according to the following specifications sheet Rated current of appliance Nominal cross sectional area mm 3 and 6 0 75 6 and 10 1 0 10 and 16 1 5 16 and 25 2 5 The cable size and the current of the fuse or switch are determined by the maximum current indicated on the nameplate which located on the side panel of the unit Please re...

Page 19: ...2 MS11D 12HRN1 QC2 MOB4 12HN1 QC2 1 2 Ф12 7 1 4 Ф6 35 5 5 10 30 MS11D 12HRN1 QB6 MOA2 12HN1 QB6 MS11D 12HRN1 QC2 MOB 11HN1 QC2 MS11D 18HRN1 QB8 MOC 18HN1 QB8 5 8 15 30 MS11D 18HRN1 QB6 MOB 18HN1 QB6 MS11D 21HRN1 QB6W MOC 21HN1 QB6W 5 8 Ф16 0 3 8 Ф9 53 5 10 20 60 MS11D 21HRN1 QB8 MOP 21HN1 QB8W MS11D 24HRN1 QB8W MOF2 24HN1 QB8W MS11D 24HRN1 QB6W MOP 24HN1 QB6W Caution The capacity test is based on ...

Page 20: ...eutral detergent on the indoor unit connections or outdoor unit connections by a soft brush to check for leakage of the connecting points of the piping If bubbles come out the pipes have leakage 1 Air purging with vacuum pump 1 Confirm that both the 2 way and 3 way valves are set to the opened position Remove the valve stem caps and confirm that the valve stems are in the opened position Be sure t...

Page 21: ...ten the 2 way and 3 way valve s stem nuts Use a torque wrench to tighten the 3 way valves service port cap to a torque of 1 8 kgf m Be sure to check for gas leakage 2 Air purging by refrigerant Procedure 1 Confirm that both the 2 way and 3 way valves are set to the closed position 2 Connect the charge set and a charging cylinder to the service port of the 3 way valve 3 Air purging Open the valves ...

Page 22: ...d the service port cap Be sure to use a torque wrench to tighten the service port cap to a torque 18N m Be sure to check the gas leakage 3 Adding the refrigerant if the pipe length 5m Procedure 1 Connect the charge hose to the charging cylinder open the 2 way valve and the 3 way valve Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder If ...

Page 23: ...e stem caps and the service port Use torque wrench to tighten the service port cap to a torque of 18N m Be sure to check for gas leakage 6 5 Adding the refrigerant after running the system for many years Procedure 1 Connect the charge hose to the 3 way service port open the 2 way valve and the 3 way valve Connect the charge hose to the valve at the bottom of the cylinder If the refrigerant is R410...

Page 24: ...onnecting the hose 7 Mount the valve stem caps and the service port Use torque wrench to tighten the service port cap to a torque of 18N m Be sure to check for gas leakage 6 6 Re installation while the indoor unit need to be repaired 1 Collecting the refrigerant into the outdoor unit Procedure 1 Confirm that both the 2 way and 3 way valves are set to the opened position Remove the valve stem caps ...

Page 25: ...Use a torque wrench to tighten the 3 way valves service port cap to a torque of 1 8 kgf m Be sure to check for gas leakage 2 Air purging by the refrigerant Procedure 1 Confirm that both the 2 way and 3 way valves are set to the closed position 2 Connect the charge set and a charging cylinder to the service port of the 3 way valve Leave the valve on the charging cylinder closed 3 Air purging Open t...

Page 26: ...open position Be sure to use a hexagonal wrench to operate the valve stems 7 Mount the valve stems nuts and the service port cap Be sure to use a torque wrench to tighten the service port cap to a torque 18N m Be sure to check the gas leakage 6 7 Re installation while the outdoor unit need to be repaired 1 Evacuation for the whole system Procedure 1 Confirm that both the 2 way and 3 way valves are...

Page 27: ...rom the charge hose Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air be careful of the liquid refrigerant 3 Put the charging cylinder onto the electronic scale and record the weight 4 Open the valves Low side on the charge set and charge the system with liquid refrigerant If the system cannot be charge with the specified amount of refrigeran...

Page 28: ...rant while operating the air conditioner turn off the air conditioner before disconnecting the hose 6 Mounted the valve stem caps and the service port Use torque wrench to tighten the service port cap to a torque of 18N m Be sure to check for gas leakage ...

Page 29: ...dels 21 52 For special tropical models CAUTION 1 If air conditioner is used outside of the above conditions certain safety protection features may come into operation and cause the unit to function abnormally 2 Room relative humidity less than 80 If the air conditioner operates in excess of this figure the surface of the air conditioner may attract condensation Please set the vertical air flow lou...

Page 30: ...dicator Flash at 0 5Hz when the unit is standby Illuminate when the unit is turned on Timer indicator This indicator illuminates when TIMER is set ON OFF Defrost Indicator This indicator illuminates when the air conditioner starts defrosting automatically or when the warm air control feature is activated in heating mode Temperature indicator Displays the temperature settings when the air condition...

Page 31: ...unit stops and LED displays failure information and can t returns to normal operation automatically 8 4 Operation Modes and Functions 8 4 1 Fan mode 1 Outdoor fan and compressor stop 2 Temperature setting function is disabled and no setting temperature is displayed 3 Indoor fan can be set to high med low auto 4 The louver operates same as in cooling mode 5 Auto fan 8 4 2 Cooling Mode 8 4 2 1 Compr...

Page 32: ...rator high temp protection in heating mode condenser high temp protection in cooling mode defrosting mode and the current protection 8 4 2 3 Indoor fan running rules In cooling mode indoor fan runs all the time and the speed can be selected as high medium low and auto The auto fan 5 T1 Ts 4 High Low 1 Medium 8 4 2 4 Evaporator low temperature T2 protection TE6 T2 On Off TE5 ...

Page 33: ...hut off When T1 is lower than Tk the compressor and outdoor fan will start up TS TB T1 On Off TS TB 2 While TB 2 for 7k 9k 12k 18k models and TB 0 for 21k 24k models 8 4 3 2 Outdoor fan running rules The outdoor units have single fan speed The outdoor fan will run following the compressor except when AC is in evaporator high temp protection in heating mode condenser high temp protection in cooling...

Page 34: ...ition of defrosting 1 AC will enter defrosting mode if all of the following items is satisfied 1 1 After the compressor keeps running 8 minutes ΔTmax ΔTmin 4 ΔT T2 T1 1 2 AC meets A1 or A2 A1 The cumulative compressor running time is between 45 120 minutes Meanwhile the value of T2 T1 meets the below table ΔT High speed THDEFROST Medium speed TMDEFROST Low speed TLDEFROST Breeze off No need to com...

Page 35: ... 10 Case 2 45 runtime 60 7 5 Case 3 60 runtime 90 8 5 Case 4 90 runtime 120 10 Case 5 120 runtime 12 2 The cumulative compressor running time is over 45 minutes Meanwhile the indoor fan off or run in breeze mode automatically for Anti cold wind function AC will enter defrosting mode and the defrosting time is ten minutes 3 If the AC haven t defrost before running and the indoor fan running in slow...

Page 36: ...in 2 Defrosting action Compressor on off on on on off off off 4 way valve Outdoor fan Indoor fan Indoor fan breeze 10s DF 5 DF Setting defrosting time F8 DF 5 DF DF 25SEC for 7k 9k 12k models and DF 45SEC for 21k 24k models 8 4 3 5 High evaporator coil temp T2 protection Model TE7 TE8 TE9 7k 60 53 50 9k 60 53 50 12k 63 53 51 MS11D 12HRN1 QC2 2T0032400212 63 44 42 18k 60 53 50 ...

Page 37: ...temperature is lower than 10 the indoor fan will run at breeze while the compressor and outdoor fan will stop and not resume until room temperature exceeds 13 8 4 5 3 The system protection is active in this mode 8 4 6 Forced operation function Press the touch button continually the AC will run as below sequence Forced auto Forced cooling Off Forced cooling mode The compressor and outdoor fan keep ...

Page 38: ...fter pressing ECONOMIC or SLEEP button on controller the machine will turn into sleep mode When cooling the setting temperature rises 1 be lower th setting temperature stops rising and indoor fan is fixed as low speed When heating the setting temperature decreases 1 be higher t later the setting temperature stops rising and indoor fan is fixed as low speed Anti cold wind function has the priority ...

Page 39: ...ind When indoor fan restarts after malfunctions being eliminated and anti cold wind being released Ionizer will be available again 8 4 11 Louver Position Memory Function When starting the unit again after shutting down its louver will restore to the angle originally set by the user but the precondition is that the angle must be within the allowable range if it exceeds it will memorize the maximum ...

Page 40: ...temperature sensor T2 open circuit or short circuit EC 2 O Refrigerant leak detection error For 21k 24k Display Operation lamp flash times Timer lamp Failure E1 1 X EEPROM error E2 2 X Zero crossing detection error E3 3 X Indoor fan speed has been out of control E4 4 X Default E5 5 X Indoor room temperature sensor T1 open circuit or short circuit E6 6 X Evaporator coil temperature sensor T2 open c...

Page 41: ...mally Turn off the unit rotate the cross fan Does it rotate freely No Disassemble the connection between fan and motor check if the bearing is normal If not change the bearing If yes follow the below step Replace the fan motor Yes Replace the indoor PCB No Yes Is the voltage being applied to the fan motor Yes Shut off the power supply and turn on it 5s later ...

Page 42: ...s the main control board must have fault Shut off the power supply and turn on it 5s later The problem comes out again Is the EEPROM chip plugged in indoor PCB well No Correct the connection Replace the main PCB of indoor unit Yes Replace outdoor PCB Yes Check the connections between the sensors and the PCB Are the connections good Replace the sensor and check if the errors happen again ...

Page 43: ... between terminal and Indoor PCB connect ok Is all the wiring to the Outdoor PCB connecting correctly Reconnect and retest Reconnect and retest Yes 24V Vs 24V Vs is the voltage between S and N Yes No Change the Indoor PCB If the AC still displays E1 Change the outdoor PCB Change the outdoor PCB If the AC still displays E1 Change the indoor PCB Turn off the power supply after 1 minute connect the p...

Page 44: ...s Replace the T2 sensor and check if the errors happen again Is there any leakage Especially the connection parts such as the gas valve and the liquid valve Is there cool air blowing out from the indoor air outlet No No Is there any block Such as the capillary or the welded points of the pipes Yes Replace the indoor PCB ...

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