Midea 11MSFI-A2-1301 Service Manual Download Page 41

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8.4.3.5 Evaporator coil temperature protection

TEstop

Resume

Off

Decrease

TEdown

TEnorm

Hold

Off: Compressor stops.

Decrease: Decrease the running frequency to the lower level.

Hold: Keep the current frequency.

Resume: No limitation for frequency.

8.4.4 Auto-mode

This mode can be chosen with remote controller and the setting temperature can be changed between

17~30

℃

In auto mode, the machine will choose cooling, heating or fan-

only mode according to ΔT (ΔT =T1-Ts).

ΔT=T1-Ts

Running mode

ΔT

＞

℃

Cooling

1<ΔT≤1

℃

Fan-only

ΔT≤-1

℃

Heating

Indoor fan will run at auto fan of the relevant mode.

The louver operates same as in relevant mode.

If the machine switches mode between heating and cooling, the compressor will keep stopping for 15

minutes and then choose mode according to T1-Ts.

If the setting temperature is modified, the machine will choose running function again.

8.4.5 Drying mode

.4.5.1 Indoor fan speed is fixed at breeze and can’t be changed. The louver angle is the same as

in cooling mode.

8.4.5.2 Compressor running rules

Summary of Contents for 11MSFI-A2-1301

Page 1: ...OASIS 3D INVERTER SERIES Service Manual 2013 11MSFI A2 1301 ...

Page 2: ... 3 Pipe length and the elevation 16 6 4 Installation for the first time 17 6 5 Adding the refrigerant after running the system for many years 20 6 6 Re installation while the indoor unit need to be repaired 21 6 7 Re installation while the outdoor unit need to be repaired 23 7 Operation Characteristics 26 8 Electronic function 27 8 1 Abbreviation 27 8 2 Display function 27 8 3 Main Protection 28 8...

Page 3: ...emble 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 f...

Page 4: ...ly plug during operation There is risk of fire or electric shock Do not touch operation the product with wet hands Do not place a heater or other appliance near the power cable There is risk of fire and electric shock Do not allow water to run into electrical parts It may cause fire failure of the product or electric shock Do not store or use flammable gas or combustible near the product There is ...

Page 5: ...wer supply plug or turn off the breaker There is risk of product damage or failure or unintended operation Take care to ensure that nobody could step on or fall onto the outdoor unit This could result in personal injury and product damage CAUTION Always check for gas refrigerant leakage after installation or repair of product Low refrigerant levels may cause failure of product Install the drain ho...

Page 6: ...oor units Always insert the filter securely Clean the filter every two weeks or more often if necessary A dirty filter reduces the efficiency of the air conditioner and could cause product malfunction or damage Do not insert hands or other objects 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 ma...

Page 7: ...HRFN1 QRC8GW MOC 18HFN1 QRC8W DC Inverter 24k MS11M1 24HRDN1 QRC8W MOF 24HFN1 QRC8W Killer Of Formaldehyde Plasma O Silver Ico Filter O Vitamin C Filter O 3M HAM Filter O Bio Filter O Golden Fin O Ionizer O Compressor Crankcase Heater O Self Clean O 1W Standby Louver Position Memory Function Refrigerant Leakage Detect Self diag Function Hydrophilic Aluminum Fin Anti rust Cabinet Valve Protection C...

Page 8: ... QRD1W A 140 110 45 MS11MU 12HRFN1 QRD0W 140 110 45 MS11MU 12HRFN1 QRD0W B 140 110 45 Model W D H MS11MU 09HRFN1 QRD0W 750 198 280 MS11M 09HRFN1 QRD1W A 835 198 280 MS11MU 12HRFN1 QRD0W 835 198 280 MS11MU 12HRFN1 QRD0W B 835 198 280 MS11M 12HRFN1 QRD1W A 990 218 315 MS11MU 18HRFN1 QRC8GW 990 218 315 MS11M1 24HRDN1 QRC8W 1186 258 340 ...

Page 9: ... Model L mm R mm H mm Dimension of installation hole mm MS11M 12HRFN1 QRD1W A 260 135 45 65 MS11MU 18HRFN1 QRC8GW Model L mm R mm H mm Dimension of installation hole mm MS11M1 24HRDN1 QRC8W 275 275 45 65 ...

Page 10: ...han 70cm More than 30cm More than 60cm Service space Fence or obstacles Model W D H W1 A B MOC 09HFN1 QRD0W 760 285 590 823 530 290 MOC 09HFN1 QRD1W MOC 12HFN1 QRD0W MOC 12HFN1 QRD1W MOC1 12HFN1 QRD0W MOC 18HFN1 QRC8W MOF 24HFN1 QRC8W 845 320 700 908 560 335 ...

Page 11: ...am For 9k 12k 18k models INDOOR OUTDOOR LIQUID SIDE 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 12: ...R 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 13: ...13 5 Wiring Diagram 5 1 Indoor Unit MS11MU 09HRFN1 QRD0W MS11M 09HRFN1 QRD1W A MS11MU 12HRFN1 QRD0W MS11M 12HRFN1 QRD1W A MS11MU 12HRFN1 QRD0W B MS11MU 18HRFN1 QRC8GW MS11M1 24HRDN1 QRC8W ...

Page 14: ...14 5 2 Outdoor Unit MOC 09HFN1 QRD0W MOC 09HFN1 QRD1W MOC 12HFN1 QRD0W MOC 12HFN1 QRD1W MOC1 12HFN1 QRD0W MOC 18HFN1 QRC8W MOF 24HFN1 QRC8W ...

Page 15: ...19 3 4 6500 663kgf cm 6700 683kgf cm 6 2 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 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 o...

Page 16: ...N1 QRD1W 5 8 20 20 MS11MU 12HRFN1 QRD0W MOC 12HFN1 QRD0W 5 8 20 20 MS11M 12HRFN1 QRD1W A MOC 12HFN1 QRD1W 5 8 20 20 MS11MU 12HRFN1 QRD0W B MOC1 12HFN1 QRD0W 5 8 20 20 MS11MU 18HRFN1 QRC8GW MOC 18HFN1 QRC8W 1 2 Ф12 7 1 4 Ф6 35 5 10 25 20 MS11M1 24HRDN1 QRC8W MOF 24HFN1 QRC8W 5 8 Ф15 9 3 8 Ф9 52 5 10 25 40 Caution The capacity test is based on the standard length and the maximum permissive length is...

Page 17: ...ft 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 outdoor units confirm that both the 2 way and 3 way valves are set to the closed position 2 Connect the charge hose with the push pin of handle lo to the 3 way valves gas service port 3 Connect the charg...

Page 18: ... indicator is a little higher than the atmosphere pressure Then remove the charge hose from the 3 way valve 8 Fully open the 2 way valve and 3 way valve and securely tighten the cap of the 3 way valve 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 ...

Page 19: ...erant 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 the refrigerant is R410A make the cylinder bottom up to ensure the liquid charge 2 Purge the air from the charge hose Open the valve at the bottom of the cy...

Page 20: ...onnect 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 R410A 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 li...

Page 21: ...le 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 and confirm that the valve stems are in the 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 valv...

Page 22: ...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 nut on the 2 way valve approximately 45 for 3 ...

Page 23: ...o 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 set to the opened position 2 Connect the vacuum pump to 3 way valve s service port 3 Evacuation for approximately one hour Confirm that the compound meter indic...

Page 24: ...ale 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 can be charged with a little at a time approximately 150g each time operating the air conditioner in the cooling cycle however one time is not sufficient wait approximately 1 minute and then repeat the proced...

Page 25: ...25 Use torque wrench to tighten the service port cap to a torque of 18N m Be sure to check for gas leakage ...

Page 26: ...he above conditions certain safety protection features may come into operation and cause the unit to operate abnormally 2 The room relative humidity should be less than 80 If the air conditioner operates beyond this figure the surface of the air conditioner may attract condensation Please set the vertical air flow louver to its maximum angle vertically to the floor and set HIGH fan mode 3 The opti...

Page 27: ...lamp illuminates when Clean Air feature is activated DEFROST indication lamp For cooling heating models only Lights up when the air conditioner starts defrosting automatically or when the warm air control feature is activated in heating operation OPERATION indication lamp This lamp illuminates when the air conditioner is in operation TIMER indication lamp Lights up during Timer operation Temperatu...

Page 28: ...low 300RPM for certain time the unit will stop and the LED will display the failure 8 3 5 Inverter module protection The Inverter module has a protection function about current voltage and temperature If these protections happen the corresponding code will display on indoor unit and the unit will stop working 8 3 6 Indoor fan delayed open function When the unit starts up the louver will be active ...

Page 29: ...minutes defrosting every 40 minutes when T4 7 2 minutes defrosting every 90 minutes when T4 7 T4 Run supposed T4 50 Run supposed T4 15 TP Run supposed T4 50 Run supposed T4 15 T1 25 23 F12 F4 30 minutes on 3 minutes off table 1 T1 20 18 F4 F12 Indoor fan 1 minute off 1 minute M ane then the setting fan speed table 2 8 4 10 Refrigerant leakage detection This function is only active in cooling mode ...

Page 30: ...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 a b c d 5 0 4 0 2 5 1 0 6 0 T1 24 e H H L 0 75 L H L 0 5 L H L 0 25 L L ...

Page 31: ...x T4FREMAX6 Fmax T4FREMAX7 Meanwhile the maximum frequency is limited by the indoor fan speed Indoor fan speed Maximum frequency High speed turbo function No limit Silent mode Fixed at F3 If users switch on AC by remote controller the compressor will run at the Fmax frequency for 7 minutes according to the outdoor ambient temp During the 7 minutes the frequency limitation is active 7 minutes later...

Page 32: ...the frequency to 3 grade higher until to FREMAX B E Increase the frequency to 2 grade higher until to FREMAX F G Increase the frequency to 1 grade higher until to FREMAX H Keep the current frequency I Decrease the frequency to 1 grade lower until to F1 J Run at F1 for 1h if T1 Ts 2 the compressor will stop Meanwhile the compressor running frequency is limited by the current 50 T4 CoolT4Zone5I Cool...

Page 33: ...20 19 17 D A Cooling Heating While A B C means different fan speed of outdoor unit 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 auto and silent When the compressor is running the indoor fan is controlled as below ...

Page 34: ...ssor will keep running at the current frequency T3 52 the compressor will not limit the frequency and resume to the former frequency T3 60 for 5 seconds the compressor will stop until T3 52 8 4 2 5 Evaporator temperature protection T2 0 the compressor will stop and restart when T2 5 0 T2 4 the compressor frequency will be limited and decreased to the lower level 4 T2 7 the compressor will keep the...

Page 35: ...mits to the following rule Fmax T4FREHEATMAX1 34 T4 Off 33 28 27 25 24 22 21 19 18 16 17 15 14 12 11 6 5 Fmax T4FREHEATMAX2 Fmax T4FREHEATMAX3 Fmax T4FREHEATMAX4 Fmax T4FREHEATMAX5 Fmax T4FREHEATMAX6 Fmax T4FREHEATMAX7 Fmax T4FREHEATMAX8 1 0 3 4 7 8 11 12 15 16 Fmax T4FREHEATMAX9 Fmax F21 Fmax F22 Fmax F23 Fmax F24 Fmax F25 ...

Page 36: ...he compressor running frequency will be controlled as below 5 0 4 5 3 5 3 0 2 5 2 0 1 5 T1 Ts ΔT 1 0 I G F E D C B A 0 5 4 0 H J While the zones of A B C are corresponding to different compressor running frequency ΔT 0 as default Note When T1 Ts keeps in the same temp zone for 3 minutes the compressor will run as the below rules A Increase the frequency to 3 grade higher until to FREMAX B E Increa...

Page 37: ...g rules 21 19 A C 18 16 D 15 13 12 10 B E Heating 8 4 3 3 Indoor fan running rules In heating mode indoor fan can be selected as high medium low auto and silent The anti cold wind function is preferential The running rules of anti cold wind function depend on both T1 and T2 that is more comfortable control When the compressor is running the indoor fan is controlled as below ...

Page 38: ...erature rising the indoor fan will be forced to run 127 seconds with breeze During this period the anti cold wind is disabled Auto fan action in heating mode 1 0 2 0 3 0 4 0 0 0 T1 Ts ΔT L H L 0 4 L H L 0 6 L 5 0 6 0 6 5 H H L 0 8 L H L 0 6 L H L 0 2 L ...

Page 39: ...30 2 If the compressor cumulate running time is up to 35 minutes and T3 TCDI2 T3 T30SUBT3TWO T30 3 If the compressor cumulate running time is up to 29 minutes and T3 TCDI3 for 3 minutes 4 If the compressor cumulate running time is up to 120 minutes and T3 15 Condition of ending defrosting If any one of the following items is satisfied the defrosting will finish and the machine will turn to normal ...

Page 40: ...or on off on on on off off off 4 way valve Outdoor fan Indoor fan Indoor fan breeze 10s xx 10s no longer than 10m 30s FrequencyF16 10s Frequency F3 xx 60 For MS11MU 18HRFN1 QRC8GW Compressor on off on on on off off off 4 way valve Outdoor fan Indoor fan Indoor fan breeze 10s xx no longer than 10m Frequency F16 30s 10s 10s Frequency F3 xx 60 ...

Page 41: ...ng heating or fan only mode according to ΔT ΔT T1 Ts ΔT T1 Ts Running mode ΔT 1 Cooling 1 ΔT 1 Fan only ΔT 1 Heating Indoor fan will run at auto fan of the relevant mode The louver operates same as in relevant mode If the machine switches mode between heating and cooling the compressor will keep stopping for 15 minutes and then choose mode according to T1 Ts If the setting temperature is modified ...

Page 42: ... the button once again within 5 seconds the machine will turn into forced cooling mode In forced auto forced cooling or any other operation mode pressing touch button will turn off the machine 8 4 6 2 In forced operation mode all general protections and remote control are available 8 4 6 3 Operation rules Forced cooling mode The compressor runs at F2 frequency and indoor fan runs as breeze After r...

Page 43: ...ure decreases 1 be higher than 17 every one hour 2 hours later the setting temperature stops rising and indoor fan is fixed as low speed Anti cold wind function has the priority 8 4 8 3 Timer setting is available 8 4 8 4 When user uses timer off function in sleep mode or sleep function in timer off mode if the timing is less than 7 hours sleep function will be cancelled when reaching the setting t...

Page 44: ...according to the room temperature from the remote controller and the setting temperature 3 The PCB will take action to the mode change information from remote controller signal but it will not affected by the setting temperature 4 When the unit is running with follow me function if the PCB doesn t receive any signal from remote controller for 7 minutes or pressing FOLLOW ME button again the follow...

Page 45: ...en you come back which helps saving more energy 8 4 16 Silence operation optional Press the silence button on remote controller to initiate SILENCE function When the Silence function is activated the compressor running frequency will keep lower than F2 and the indoor unit will bring faint breeze which will reduce the noise to the lowest level and create a quiet and comfortable room for you 8 4 17 ...

Page 46: ...imes X EC Refrigerant Leakage Detection 2 times O F1 Outdoor ambient temperature sensor T4 open circuit or short circuit 3 times O F2 Condenser coil temperature sensor T3 open circuit or short circuit 4 times O F3 Compressor discharge temperature sensor T5 open circuit or short circuit 5 times O F4 Outdoor unit EEPROM parameter error 6 times O F5 Outdoor fan speed has been out of control 1 times P...

Page 47: ...he main PCB directly Otherwise check whether the EEPROM chip plugged in main PCB well Yes No Yes Correct the connection Replace the indoor main PCB Shut off the power supply and turn it on 5 seconds later Is it still displaying the error code EEPROM a read only memory whose contents can be erased and reprogrammed using a pulsed voltage ...

Page 48: ...he error still displaying after several minutes No Yes Change the outdoor main PCB Power on Is the error extinguished Check all the wirings between indoor and outdoor indoor main PCB and outdoor main PCB following the wiring diagram Are all the wirings connected correctly Is the wiring to the indoor main PCB connected correctly Change the indoor main PCB Yes Change the outdoor main PCB No Is the w...

Page 49: ...displaying the error code Shut off the power supply rotate the fan by hand Does it rotate properly The unit operates normally Find out the cause and have it solved For example check whether the fan is blocked or the bearing is broken Check the wires of fan motor Are all the connections good No Yes No Correct the connections No Yes Check whether the main PCB is normal through index 2 Yes Yes Check ...

Page 50: ...oor AC Fan Motor Measure the resistance value of each winding by using the tester 3 Outdoor DC Fan Motor control chip is in outdoor PCB NO 1 2 3 4 5 Color Orange Grey White Pink Black Signal Hu Hv Hw Vcc GND Color Red Blue Yellow Signal W V U 1 Release the UVW connector Measure the resistance of U V U W V W If the resistance is not equal to each other the fan motor must has problems and need to be...

Page 51: ...n the unit is in standby measure the voltage of pin1 pin3 pin4 pin3 in fan motor connector If the value of the voltage is not in the range showing in below table the PCB must has problems and need to be replaced DC motor voltage input and output NO Color Signal Voltage 1 Red Vs Vm 280V 380V 2 3 Black GND 0V 4 White Vcc 14 17 5V 5 Yellow Vsp 0 5 6V 6 Blue FG 14 17 5V 2 Indoor AC Fan Motor Power on ...

Page 52: ...3 Check the connections between temperature sensor and PCB Are the connections good Correct the connections No Yes Yes Replace indoor or outdoor PCB Replace the sensor and c h e c k i f t h e p r o b l e m happen again Check the resistance value of the sensor via table1 and table 2 is it normal No ...

Page 53: ... Does the problem remain again No Is there any leakage Especially the connection parts such as the gas valve and the liquid valve No Shut off the power supply and turn it on 5 seconds later Is it still displaying the error code Replace indoor PCB Yes Repair the leakage and recharge the refrigerant Yes Clear the blocking Yes Is there any block i n g Such as the capillary or the welded points of the...

Page 54: ...apply silicon grease No IPM continuity check Check if the IPM terminal resistance values are uniform Yes Replace the IPM board or replace the main PCB if the IPM board and main PCB are integrated together No Check if the outdoor fan runs properly or the outdoor unit ventilation is good Yes No Refer to the solution of fan speed has been out of control malfunction Find out the cause and have it solv...

Page 55: ...ets normal No Yes No Correct the connections or replace the wires Yes Power on and when the unit is in standby check if the voltage between P and N is around DC 310V or 340V or 380V For different kinds of units the voltage differs Consult with technical engineer to get definite value Then start up the unit measure the voltage between P and N Is it in 220V 400V Replace outdoor mainl PCB Yes No Repl...

Page 56: ...on grease No IPM continuity check Check if the IPM terminal resistance values are uniform Yes Replace the IPM board or replace the main PCB if the IPM board and main PCB are integrated together No Check if the outdoor fan runs properly or the outdoor unit ventilation is good Yes No Refer to the solution of fan speed has been out of control malfunction Find out the cause and have it solved Yes Chec...

Page 57: ...TAGE CAUTION Connect discharge resistance approx 100Ω 40W or soldering iron plug between terminals of the electrolytic capacitor on the contrary side of the outdoor PCB Note The picture above is only for reference The plug of your side may be different Main parts check 1 Temperature sensor checking Disconnect the temperature sensor from PCB measure the resistance value with a tester ...

Page 58: ...of each winding by using the multi meter Table 1 Some frequently used R T data for T1 T2 T3 and T4 sensor Temperature 5 10 15 20 25 30 40 50 60 Resistance Value KΩ 26 9 20 7 16 1 12 6 10 8 5 2 3 5 2 4 Table 2 Some frequently used R T data for T5 sensor Temperature 5 15 25 35 60 70 80 90 100 Resistance Value KΩ 141 6 88 56 1 36 6 13 8 9 7 6 9 5 3 7 Resistance value KΩ Temperature T5 T1 T2 T3 T4 ...

Page 59: ...A130M1C 31FZ DA108X1C 20FZ3 Indoor fan motor WZDK20 38G WZDK58 38G WZDK20 38G Outdoor fan motor WZDK35 38G H WZDK35 38G H WZDK35 38G H Code 2T0033000477 Model MS11M1 24HRDN1 QRC8W Compressor DA250S2C 30MT Indoor fan motor RPG50C Outdoor fan motor WZDK50 38G Note The motor marked means DC fan motor with control chip in the PCB while the ones marked means DC fan motor with control chip in the fan mo...

Page 60: ...tic capacitors discharge completely and dismount the IPM Use a digital tester to measure the resistance between P and UVWN UVW and N Digital tester Normal resistance value Red Black Several MΩ P N U V W Digital tester Normal resistance value Red Black Several MΩ U N V W Red Blue ...

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