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Midea MFGA-60ARDN1-QC2, Service Manual

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Midea MFGA-60ARDN1-QC2 Service Manual Download Page 32

 

29 

 

any further when it stops with a "click" sound.   

2. Press the manual switch button twice until the operation indicator lights, the unit will   

operate on Manual Cool mode.   

3.

 

Check if all the functions works well while testing the air conditioner. Especially check 

whether the drainage of indoor unit is smooth or not. 

4.

 

Press  the  manual  switch  button  again  till  the  operation  indicator  turns  dark  after 

finishing the test operation and the unit stops operation. 

   

 

 

 

 

 

 

 

Summary of Contents for MFGA-60ARDN1-QC2

Page 1: ...SERVICE MANUAL AIRCONDITIONER FLOOR STANDING TYPE Model MFGA 60ARDN1 QC2 ...

Page 2: ... connection 10 5 3 3 Installation for the first time 15 5 3 4 Adding the refrigerant after running the system for many years 20 5 3 5 Re installation while the indoor unit need to be repaired 22 5 3 6 Re installation while the outdoor unit need to be repaired 25 5 4 Drain Pipe of The Indoor Unit 28 5 5 Wiring 28 5 6 TEST RUN 28 6 External view and display 30 6 1 External view 30 6 2 CONTROL PANEL ...

Page 3: ...2 Operation Modes and Functions 32 8 3 Other Functions 37 9 Characteristic of temperature sensor 38 10 Trouble shooting 38 10 1 Protective Function 38 10 2 Self diagnosis 40 10 3 Troubles and Solutions 40 ...

Page 4: ...use flammable gas or combustible near the product When flammable gas leaks turn off the gas and open a window for ventilation before turn the product on If strange sounds or small or smoke comes from product Turn the breaker off or disconnect the power supply cable as soon as possible When the product is soaked flooded or submerged contact an Authorized service center Be caution that water could n...

Page 5: ...n the product outdoor units Always insert the filter securely Clean the filter every two weeks or more often if necessary Do not insert hands or other object through air inlet or outlet while the product is operated Do not drink the water drained from the product Use a firm stool or ladder when cleaning or maintaining the product Replace the all batteries in the remote control with new ones of the...

Page 6: ...3 2 Dimension 2 1 Indoor Unit Dimension Mode W mm D mm H mm MFGA 60ARDN1 QC2 610 390 1925 ...

Page 7: ...4 2 2 Outdoor Unit MODEL A B C D E F H MOU 60HDN1 R 940 600 376 400 340 360 1245 ...

Page 8: ...cycle diagram INDOOR OUTDOOR LIQUIDSIDE GAS SIDE HEAT EXCHANGE EVAPORATOR HEAT EXCHANGE CONDENSER COMPRESSOR 2 WAY VALVE 3 WAY VALVE Electronic Expansion Valve CAPILIARY TUBE REVERSING VALVE COOLING HEATING ACCUMULATOR ...

Page 9: ...6 4 Wiring diagram MFGA 60ARDN1 QC2 Indoor Unit Outdoor Unit ...

Page 10: ... and the curved places bend of the pipe are no more than the following numbers Elevation difference no more than 10M if the elevation difference between indoor and outdoor unit is more than 10 meters it is recommended that the indoor unit be located higher than the outdoor unit Pipe length no more than 20M Bends no more than 3 places 5 1 2 Outdoor Unit 5 1 2 1 Before installing the outdoor unit yo...

Page 11: ...or where no constructions are around you should avoid hard wind blows directly to the air outlet because it may cause trouble for air flow shortage 5 1 2 3 Reserve enough space for installation maintenance and unit functioning Remove as many obstacles as possible nearby 5 2 Installing 5 2 1 Indoor Unit 1 Anti falling To prevent the indoor unit from falling you must a Pay full attention to the unit...

Page 12: ...nnecting the pipes wires Pull down the two knobs on the grid take off the two screws then the air inlet grid goes free 3 Take the Pipe Clip off before connecting the pipes and wiring fit it when these finished Use accessories to connect the pipes wires on both sides and back side ...

Page 13: ... wall 5 Fix the unit feet with bolts M10 M8 Be sure the unit is fixed strongly enough to against blast or earthquake 6 Make a concrete basement to the unit by the following references For the value of A and B please refer to the dimension table 5 3 Refrigerant pipe connection 5 3 1 Pipe length and the elevation The correct refrigerant quantity filled in the 5 meter long pipe of the outdoor unit is...

Page 14: ... unit done can the refrigerant pipe be connected b The cut off valves are completely close before ex work Before connecting the refrigerant pipe be careful to check whether the valves are completely close c The connecting procedure of refrigerant pipe first unscrew the two valves on the outdoor unit and the pipe jointing nut on the indoor unit please keep them care fully Please connect the refrige...

Page 15: ...ystem or it will be sick for low efficiency f Gas leak check Make sure no gas from connections with leak detector or soap water Caution A Lo packed valve B Hi packed valve C and D are ends of indoor unit connection Caution in Handling the Packed Valve a Open the valve stem until it hits against the stopper Do not try to open it further b Securely tighten the valve stem cap with a spanner or the li...

Page 16: ...h both the indoor and outdoor unit let the air exhaust out from the maintenance gap on he low pressure cut off valves of the outdoor unit Screw the nuts tightly on the maintenance gap after the air has been drained 5 3 2 3 To make the refrigerant pipe unblocked completely You should keep the cut off valves of the outdoor unit completely open after you have finished the above steps 5 3 2 1 or 5 3 2...

Page 17: ...14 Outside diameter Torque Additional tightening torque mm inch N cm N cm Ф9 52 3 8 2500 2600 Ф12 7 1 2 3500 3600 Ф16 5 8 4500 4700 Ф19 3 4 6500 6700 ...

Page 18: ...evacuated to remove gas and moisture from the system Gas leak check Soap water method Apply soap water or a liquid neutral 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 Completely tighten the flare nuts of the indoor and outd...

Page 19: ... can t achieve 0 1Mpa after pumping 50 minutes please check if there are some leakage points Fully close the handle Lo valve of the manifold valve and stop the operation of the vacuum pump Confirm that the gauge needle does not move approximately 5 minutes after turning off the vacuum pump 7 Turn the flare nut of the 3 way valves about 45 counterclockwise for 6 or 7seconds after the gas coming out...

Page 20: ...way valve 4 Check the gas leakage Check the flare connections for gas leakage 5 Discharge the refrigerant Close the valve on the charging cylinder and discharge the refrigerant by loosening the flare nut on the 2 way valve approximately 45 until the gauge indicates 0 3 to 0 5 Mpa 6 Disconnect the charge set and the charging cylinder and set the 2 way and 3 way valves to the open position Be sure t...

Page 21: ...2 Purge the air from 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 Operate the air conditioner at the cooling mode 5 Open the valves Low side on the charge set and charge the system with liquid refrigerant 6 W...

Page 22: ...service port immediately and turn off the air conditioner before disconnecting 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 ...

Page 23: ...0A make the cylinder bottom up to ensure liquid charge 2 Purge the air from 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 Operate the air conditioner at the cooling mode 5 Open the valves Low side on the charg...

Page 24: ...e low side disconnect the charge hose from the 3 way valve s service port immediately and turn off the air conditioner before disconnecting 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 ...

Page 25: ...he opened position Be sure to use a hexagonal wrench to operate the valve stems 2 Connect the charge hose with the push pin of handle lo to the 3 way valves gas service port 3 Air purging of the charge hose Open the handle Lo valve of the manifold valve slightly to purge air from the charge hose for 5 seconds and then close it quickly 4 Set the 2 way valve to the close position 5 Operate the air c...

Page 26: ... 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 the valves on the charging cylinder and the charge set Purge the air by loosening the flare n...

Page 27: ...igerant by loosening the flare nut on the 2 way valve approximately 45 until the gauge indicates 0 3 to 0 5 Mpa 6 Disconnect the charge set and the charging cylinder and set the 2 way and 3 way valves to the 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 ...

Page 28: ... Connect the vacuum pump to 3 way valve s service port 3 Evacuation for approximately one hour Confirm that the compound meter indicates 0 1Mpa 4 Close the valve Low side on the charge set turn off the vacuum pump and confirm that the gauge needle does not move approximately 5 minutes after turning off the vacuum pump 5 Disconnect the charge hose from the vacuum pump 2 Refrigerant charging ...

Page 29: ...e 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 refrigerant or c...

Page 30: ...nect the charge hose from the 3 way valve s service port immediately 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 ...

Page 31: ...hickness and use Glue Band to fix it 5 After the Drain Pipe has been connected please check if the water drains out of the pipe efficiently and has no leakage 6 Refrigerant pipe and Drainpipe should be heat insulated to avoid condensing and water dropping later on 5 5 Wiring Please refer to the Wiring Diagram Note The power supply of the air conditioner is different according to the models Please ...

Page 32: ...he unit will operate on Manual Cool mode 3 Check if all the functions works well while testing the air conditioner Especially check whether the drainage of indoor unit is smooth or not 4 Press the manual switch button again till the operation indicator turns dark after finishing the test operation and the unit stops operation ...

Page 33: ...l view This unit consists of indoor unit and outdoor unit Note All the pictures in this manual are for explanation purpose only They may be slightly different from the air conditioner you purchased depend on model The actual shape shall prevail ...

Page 34: ...aracteristics 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 ...

Page 35: ... Ts Set temperature T1 Room temperature T2 Evaporator coil temperature T3 Condenser coil temperature T4 Outdoor ambient temperature 8 2 Operation Modes and Functions 8 2 1Manual Operation 8 2 2 Heating Mode 8 2 2 1 Four way valve opens at once while defrosting process closes 8 2 2 2 After AC starts up the PCB will calculate the capacity demand a b c d 3 2 1 0 ΔT 3 Capacity demand a b c d HP 1 2 1 ...

Page 36: ... fan speed among high low auto anti cold air function takes priority Auto fan in heating mode 8 2 2 4 Outdoor fan In low temp cooling zone the outdoor fan will be controlled as below 8 2 2 5 Anti cold air When evaporator coil temp T2 is getting higher T2 TE2 the indoor fan will run at setting speed TE1 T2 TE2 the indoor fan will run at low speed ...

Page 37: ...un at low speed T2 TE4 the indoor fan will shut off TE2 T2 TE1 Setting Off TE3 TE4 Low While TE1 30 TE2 35 TE3 32 TE4 26 8 2 3 Defrost only available to heating mode 8 2 3 1 Condition of defrosting The units run with T3 2 for 40 minutes 8 2 3 2 Defrosting Action ...

Page 38: ...atisfied the PTC will open Indoor fan is on Compressor is on Indoor evaporator temperature T2 40 T1 3 TS 6 2 Close conditions If one of the following conditions is satisfied the PTC will close T1 3 TS No capacity requirement compressor is off Indoor fan is off Indoor evaporator temperature T2 52 If the PTC opens the indoor fan will be closed 15sec delay 8 2 4 Cooling Mode 8 2 4 1 Four way valve is...

Page 39: ...l outlet temp According to the capacity demand the compressor will run at the corresponding frequency 8 2 4 3 Action of Indoor Fan HIGH LOW AUTO fan can be switched over by your comfort Auto fan under cooling mode 8 2 4 4 Outdoor Fan 8 2 5 Dehumidifying Mode 8 2 5 1 Indoor fan speed is low 8 2 5 2 Four way valve is closed the compressor and outdoor fan will operate the same as in cooling mode 8 2 ...

Page 40: ...an are shut down 8 2 7 3 High Low Auto fan can be switched over through manual control Auto fan will be controlled in line with cooling auto fan with temperature set to be 24 C 8 3 Other Functions 8 3 1 LCD display Mode Set temp fan speed time timer protection etc 8 3 2 Timer The machine should be provided with max Interval of 24h and min resolution ratio of 30 minutes Condition Mode T1 Ts 2 C Coo...

Page 41: ... KΩ 10 62 2756 17 14 6181 44 4 3874 9 58 7079 18 13 918 45 4 2126 8 56 3694 19 13 2631 46 4 0459 7 52 2438 20 12 6431 47 3 8867 6 49 3161 21 12 0561 48 3 7348 5 46 5725 22 11 5 49 3 5896 4 44 23 10 9731 50 3 451 3 41 5878 24 10 4736 51 3 3185 2 39 8239 25 10 52 3 1918 1 37 1988 26 9 5507 53 3 0707 0 35 2024 27 9 1245 54 2 959 1 33 3269 28 8 7198 55 2 8442 2 31 5635 29 8 3357 56 2 7382 3 29 9058 30...

Page 42: ...tdoor protection When outdoor protection signal is high level last 4 seconds outdoor unit will perform protection the whole machine will be shut down while the indoor unit will indicate the corresponding protection signal Ed The A C will recover if outdoor errors are eliminated after the outdoor protection occurs Condition Outdoor fan Compressor T2 2 C last 3 minutes Off Off T2 7 C On On Condition...

Page 43: ...lure Wait for power restoring The power supply is disconnected Switch on the main power switch The power fuse is blown Change the fuse The timer is set Wait or cancel timer setting The batteries of the remote control are exhausted Change the batteries Air conditioner does not cool or heat well The temperature setting is too high or too low Set a more comfortable temperature The air filter is clogg...

Page 44: ...people 3 P0 The temperature of the evaporator of indoor unit is too low For the protection feature the compressor turns off automatically The temperature of the evaporator of indoor unit is too low For the protection feature the compressor turns off automatically 4 E7 EEPROM chip malfunction Contact service people 5 P1 Defrosting or anti cold air The unit will auto restart after finishing the defr...

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