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Midea MOC-09CFN1-BS0W, Service Manual

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Midea MOC-09CFN1-BS0W Service Manual Download Page 62

 

           

60 

9.3.2 Indoor / outdoor units communication diagnosis and solution(E1)

 

 

Yes

Yes

Measure  Vs, is it moving alternately 
between positive value and negative 
value?
(Vs is the voltage between S and N of 
outdoor unit.)

Yes

Power off, then turn on the unit 5 seconds 
later(reconnect the power wire).Is the 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  wiring  to  the  outdoor  m a i n 
PCB connected correctly? 

Power on. Is the error extinguished?

Change the indoor main PCB.

No

 

 

Summary of Contents for MOC-09CFN1-BS0W

Page 1: ...9ASUL A1 1211 SERVICE MANUAL MIDEA AIRCONDITIONER DC INVERTER SPLIT WALL MOUNTED TYPE...

Page 2: ...nd the elevation 27 6 4 Installation for the first time 28 6 5 Adding the refrigerant after running the system for many years 31 6 6 Re installation while the indoor unit need to be repaired 32 6 7 Re...

Page 3: ...le 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...

Page 4: ...uring 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 Th...

Page 5: ...electric shock Be caution 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...

Page 6: ...to your health Do not use the product for special purposes such as preserving foods works of art etc It is a consumer air conditioner not a precision refrigerant system There is risk of damage or los...

Page 7: ...Be careful and avoid personal injury Replace the all batteries in the remote control with new ones of the same type Do not mix old and mew batteries or different types of batteries There is risk of f...

Page 8: ...W MOC 12CFN1 BS0W MS9A 12CRDN1 MS0W MS9A 12CRDN1 MS0W MOC 12CRDN1 MS0W MS9A 12HRDN1 BS0W MS9A 12HRDN1 BS0W MOC 12HRFN1 BS0W MS9A 12HRDN1 MS0W MS9A 12HRDN1 MS0W MOC 12HRFN1 MS0W MS9A 12HRDN1 BS0W B MS9...

Page 9: ...ter O Bio Filter O Golden Fin O killer of formaldehyde Compressor Crankcase Heater O 8 degree heating O Heat compensation O Self diag function Hydrophilic aluminum fin Anti rust cabinet Valve protecti...

Page 10: ...S9A 09HRDN1 BS0W MS9A 12HRDN1 MP0W MS9A 12CRDN1 BS0W MS9A 12HRDN1 BS0W MS9A 12CRDN1 MS0W MS9A 12HRDN1 MS0W MS9A 12HRDN1 BS0W B 920 36 22in 292 11 50in 223 8 78in MS9A 18HRDN1 MP0W MS9A 18CRDN1 MS0W MS...

Page 11: ...of installation hole mm MS9A 09HRDN1 MP0W 100 151 45 65 MS9A 09HRDN1 BQ0W Model L mm R mm H mm Dimension of installation hole mm MS9A 09CRDN1 BS0W 150 187 45 65 MS9A 09HRDN1 BS0W MS9A 12HRDN1 MP0W MS9...

Page 12: ...N1 BS0W B Model L mm R mm H mm Dimension of installation hole mm MS9A 18HRDN1 MP0W 100 119 45 65 MS9A 18CRDN1 MS0W MS9A 18HRDN1 MS0W MS9A 24HRDN1 MP0W MS9A 24CRDN1 MP0W Model L mm H mm Dimension of in...

Page 13: ...530 20 87in 290 11 42in MOC 09CFN1 BS0W MOC 09HRFN1 BS0W MOC 09HFN1 BQ0W MOC 12HDN1 MP0W MOC 12CFN1 BS0W MOC 12CRDN1 MS0W MOC 12HRFN1 BS0W MOC 12HRFN1 MS0W MOC 12HFN1 BS0W MOF 18HDN1 MP0W 845 33 27in...

Page 14: ...12 4 Refrigerant Cycle Diagram For cooling only models INDOOR OUTDOOR LIQUID SIDE GAS SIDE HEAT EXCHANGE EVAPORATOR HEAT EXCHANGE CONDENSER COMPRESSOR CAPILIARY TUBE...

Page 15: ...DOOR 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 C...

Page 16: ...14 5 Wiring Diagram 5 1 Indoor Units MS9A 09HRDN1 MP0W MS9A 12HRDN1 MP0W MS9A 12CRDN1 MS0W MS9A 12HRDN1 MS0W MS9A 09CRDN1 BS0W MS9A 09HRDN1 BS0W MS9A 12CRDN1 BS0W MS9A 12HRDN1 BS0W...

Page 17: ...15 MS9A 18HRDN1 MP0W MS9A 18CRDN1 MS0W MS9A 18HRDN1 MS0W MS9A 24HRDN1 MP0W...

Page 18: ...16 MS9A 09HRDN1 BQ0W MS9A 12HRDN1 BS0W B...

Page 19: ...17 MS9A 24CRDN1 MP0W...

Page 20: ...18 MS9A 24HRDN1 MS0W...

Page 21: ...19 5 2 Outdoor Units MOC 09HDN1 MP0W MOC 12HDN1 MP0W MOC 09CFN1 BS0W MOC 09HRFN1 BS0W MOC 12CFN1 BS0W MOC 12HRFN1 BS0W...

Page 22: ...20 MOC 12CRDN1 MS0W MOC 12HRFN1 MS0W...

Page 23: ...21 MOF 18HDN1 MP0W MOF 18CRFN1 MS0W...

Page 24: ...22 MOF 18HRFN1 MS0W MOG 24HDN1 MP0W...

Page 25: ...23 MOC 09HFN1 BQ0W MOC 12HFN1 BS0W MOF 24HDN1 MP0W...

Page 26: ...24 MOG 24HDN1 MS0W MOF 24CDN1 MP0W...

Page 27: ...n Outside diameter Torque Additional tightening torque mm inch N cm N cm 6 35 1 4 1500 153kgf cm 1600 163kgf cm 9 52 3 8 2500 255kgf cm 2600 265kgf cm 12 7 1 2 3500 357kgf cm 3600 367kgf cm 15 9 5 8 4...

Page 28: ...rding to the following specifications sheet 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...

Page 29: ...se vacuum pump 9k 12k More than 5m Use vacuum pump Pipe length 5 20g m 18k 24k More than 5m Use vacuum pump Pipe length 5 40g m Model Standard length m Max Elevation B m Max Length A m 9k 12k 5 8 20 1...

Page 30: ...t 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 31: ...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...

Page 32: ...rant 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...

Page 33: ...nnect 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 cylinde...

Page 34: ...e 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 c...

Page 35: ...y 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...

Page 36: ...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 th...

Page 37: ...le 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 ch...

Page 38: ...36 Use torque wrench to tighten the service port cap to a torque of 18N m Be sure to check for gas leakage...

Page 39: ...er 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 conditi...

Page 40: ...8 2 1 Icon explanation on indoor display board OPERATION indication lamp This lamp illuminates when the air conditioner is in operation AUTO indication lamp Lights up during the Auto operation Ion in...

Page 41: ...essor top The unit will stop working when the compressor top temp protector cut off and will restart after the compressor top temp protector restart 8 3 3 Temperature protection of compressor discharg...

Page 42: ...compressor from the wiring terminal of the compressor then the compressor is heated without operation Preheating release condition If T4 5 or the compressor starts running the preheating function wil...

Page 43: ...s according to the outdoor ambient temp During the 7 minutes the frequency limitation is active 7 minutes later the compressor running frequency will be controlled as below 3 5 3 0 2 5 2 0 1 5 1 0 0 5...

Page 44: ...the running frequency to the lower level Hold Keep the current frequency Resume No limitation for frequency Note When AC is in hold zone for 3 minutes the compressor frequency will rise to the higher...

Page 45: ...equency 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 low temperature T2 protection T...

Page 46: ...Fmax F9 Fmax F10 Fmax F8 Fmax F6 Fmax F2 34 Off 33 28 27 25 24 22 21 19 18 16 17 15 14 Fmax F4 12 11 6 5 If users switch on AC by remote controller the compressor will run at the Fmax frequency for 7...

Page 47: ...ressor will run as the below rules A E Increase the frequency to the higher level until to F10 F Keep the current frequency G Decrease the frequency to the lower level until to F1 H Run at F1 for 1h i...

Page 48: ...minutes the compressor frequency will rise to the higher level The frequency will increase twice at most 8 4 3 2 Outdoor fan running rules 17 15 Low High 8 4 3 3 Indoor fan running rules For 9k 12k M...

Page 49: ...e anti cold wind function is disabled Indoor fan speed can be set as high medium low or auto fan and the anti cold wind function is preferential Auto fan action in heating mode 2 5 2 High Low 1 Medium...

Page 50: ...or more than 120 minutes and T3 keeps lower than TCDI 4 for more than 3 minutes the machine will enter defrosting mode no matter if T2 drops more than 5 or not Condition of ending defrosting If any on...

Page 51: ...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 F8 30s 10s 10s Frequency F2 Model XX MS9A 18HRDN1 MS0W 60 MS9A 24HRDN1 MS0W 90 MS9...

Page 52: ...runs for 20s When the frequency decreases to F2 and the T2 is still over TEH2 for 3 minutes the compressor will stop T2 48 or T2 stays in 48 TEH2 for 6 minutes the frequency will not be limited by T2...

Page 53: ...5 3 Low indoor room temperature protection In drying mode if room temperature is lower than 10 the compressor will stop and not resume until room temperature exceeds 12 8 4 5 4 Evaporator anti freezi...

Page 54: ...setting off time and then turn on automatically when reaching the setting on time 8 4 7 6 The timer function will not change the AC current operation mode Suppose AC is off now it will not start up fi...

Page 55: ...etting not including swing function automatically after 3 minutes when power returns If the memorization condition is forced cooling mode the unit will run in cooling mode for 30 minutes and turn to a...

Page 56: ...scharge the electricity power in capacitor Electrolytic Capacitors HIGH VOLTAGE CAUTION Connect discharge resistance approx 100 40W or soldering iron plug between terminals of the electrolytic capacit...

Page 57: ...A 18CRDN1 MS0W MS9A 12HRDN1 MS0W MS9A 18HRDN1 MS0W P0 IPM malfunction or IGBT over strong current protection P1 Over voltage or too low voltage protection P2 Temperature protection of compressor top e...

Page 58: ...56 E4 Reserved function...

Page 59: ...ower on it will be slow flash when the unit is in standby and quick flash 2 5Hz if the unit has some problems LED 6 green and LED5 red are two lights controlled by the compressor drive chip Below is m...

Page 60: ...o low voltage protection O O P1 5 Over voltage or too low voltage protection O P1 6 Inverter compressor drive error X P4 7 Inverter compressor drive error O P4 8 Inverter compressor drive error P4 O l...

Page 61: ...e 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 la...

Page 62: ...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...

Page 63: ...isplaying 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...

Page 64: ...ex2 1 Indoor AC Fan Motor Power on and set the unit running in fan mode at high fan speed After running for 15 seconds measure the voltage of pin1 and pin2 If the value of the voltage is less than 100...

Page 65: ...63 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...

Page 66: ...e connections between temperature sensor and main PCB Are the connections good Correct the connections No Yes Yes Replace indoor or outdoor main PCB Replace the sensor and c h e c k i f t h e p r o b...

Page 67: ...pply 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 toget...

Page 68: ...ts 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...

Page 69: ...urn it on 10 minutes later Check if the unit can start normally No Check if the refrigerant charge volume is normal Recharge the correct refrigerant volume Refrigerant system is blocked such as capill...

Page 70: ...n 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 Chec...

Page 71: ...Compressor discharge temp T5 sensor Measure the resistance value 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...

Page 72: ...70...

Page 73: ...71 Appendix 10 11 12 13 14 15 16 F 48 50 52 54 56 58 60 17 18 19 20 21 22 23 F 62 64 66 68 70 72 74 24 25 26 27 28 29 30 F 76 78 80 82 84 86 88 31 32 33 34 35 F 90 92 94 96 98...

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