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Fisher FS2MIF-141AE2, Service Manual

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Fisher FS2MIF-141AE2 Service Manual Download Page 36

 

 

9.3.1.3 indoor unit fan speed has been out of control   

 

Index 1: 
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 100V(208~240V power supply)or 50V(115V 
power supply), the PCB must have problems and need to be replaced. 

 

 
2. Indoor DC fan motor(control chip is inside fan motor) 
Power on and when 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 have 
problems and need to be replaced. 
For other models: 

Summary of Contents for FS2MIF-141AE2

Page 1: ...oor units FS2MIF 141AE2 FS2MIF 181AE2 FS3MIF 211AE2 FS3MIF 271AE2 FS4MIF 281AE2 FS4MIF 361AE2 FS5MIF 421AE0 NOTE Before servicing the unit please read this at first Always contact with your service center if meet problem FI_SM_MULTI OUTDOOR FS2 3 4 5MIF 1AE2_161205 ...

Page 2: ...on of Outdoor Units 3 2 Features 4 3 Dimensions 5 4 Refrigeration Cycle Diagram 6 5 Wiring diagram 8 6 Indoor units combination 11 7 Sound Levels 13 8 Installation Details 14 9 Electronic control function 24 10 Troubleshooting 29 ...

Page 3: ... 800x333x554 ASN108D22UEZ 800x333x554 ASM135D23UFZ 845x363x702 ASM135D23UFZ 845x363x702 ATF235D22UMT 946x410x810 ATF235D22UMT 946x410x810 ATF310D43UMT 946x410x810 ATF310D43UMT FS2MIF 141AE2 FS2MIF 181AE2 FS3MIF 211AE2 FS3MIF 271AE2 FS4MIF 281AE2 FS4MIF 361AE2 FS5MIF 421AE0 3 ...

Page 4: ...valves and prevents water from dripping 4 way valve control It is only operated in the heating operation mode except defrosting operation Outdoor unit Power relay control Hydrophilic aluminum fin Anti rust cabinet Valve protection cover Low noise air flow system Discharge pipe temperature protection 4 ...

Page 5: ...00 333 554 860 514 340 845 363 702 923 540 350 845 363 702 923 540 350 946 410 810 1034 673 403 946 410 810 1034 673 403 FS2MIF 141AE2 FS2MIF 181AE2 FS2MIF 141AE2 FS2MIF 181AE2 FS3MIF 211AE2 FS3MIF 271AE2 FS4MIF 281AE2 FS4MIF 361AE2 946 410 810 1034 673 403 FS5MIF 421AE0 5 ...

Page 6: ...ILIARY B LIQUID VALVE B GAS VALVE B Accumulator T2B A Evaporator temp sensor outlet T2B B 4 2 Refrigeration circuit drawing of inverter 1 drive 3 type LIQUID VALVE A GAS VALVE A HEAT EXCHANGE EVAPORATOR HEAT EXCHANGE CONDENSER Compressor 4 WAY VALVE COOLING HEATING T2 Evaporator temp sensor middle T1 Room temp sensor T3 Condenser temp sensor T5 Discharge temp sensor T4 Ambient temp sensor INDOOR O...

Page 7: ... Low pressure switch T2B A Evaporator temp sensor outlet T2B B T2B C T2B D 4 4 Refrigeration circuit drawing of inverter 1 drive 5 type LIQUID VALVE A GAS VALVE A HEAT EXCHANGE EVAPORATOR HEAT EXCHANGE CONDENSER COOLING HEATING T2 Evaporator temp sensor middle T1 Room temp sensor T3 Condenser temp sensor T4 Ambient temp sensor INDOOR OUTDOOR EXV A CAPILIARY A CHECK VALVE CAPILIARY TUBE EXV B CAPIL...

Page 8: ...5 Wiring diagram FS2MIF 141AE2 FS2MIF 181AE2 FS3MIF 211AE2 FS3MIF 271AE2 8 ...

Page 9: ...FS4MIF 281AE2 FS4MIF 361AE2 9 ...

Page 10: ...FS5MIF 421AE0 10 ...

Page 11: ...nit Four unit FS2MIF 141AE2 FS2MIF 181AE2 7 12 9 18 FS3MIF 211AE2 FS3MIF 271AE2 FS4MIF 281AE2 7 18 9 12 9 18 12 12 12 18 7 7 7 7 7 9 7 7 12 7 9 9 7 9 12 9 9 9 9 9 12 7 18 9 12 9 18 12 12 12 18 18 18 7 7 7 7 7 9 7 7 12 7 7 18 7 9 9 7 9 12 7 9 18 7 12 12 7 12 18 9 9 9 9 9 12 9 9 18 9 12 12 9 12 18 12 12 12 7 18 7 24 9 18 9 24 12 18 12 24 18 18 7 7 12 7 7 18 7 7 24 7 9 9 7 9 12 7 9 18 7 12 12 7 9 24 ...

Page 12: ... 7 9 9 7 7 9 9 12 9 9 9 9 12 12 12 12 12 12 7 7 7 9 12 7 7 9 9 18 9 9 9 9 18 One unit Two unit Three unit Four unit 12 12 12 7 7 7 7 7 7 9 24 7 9 12 12 9 9 12 12 12 12 18 7 7 7 9 7 7 12 12 7 9 12 18 9 9 12 18 12 12 24 7 7 7 12 7 7 12 18 7 9 18 18 9 12 12 12 12 18 18 7 7 7 18 7 7 18 18 7 12 12 12 9 12 12 18 7 7 7 24 7 9 9 9 7 12 12 18 12 12 12 12 7 7 9 9 7 9 9 12 9 9 9 9 12 12 12 18 7 7 9 12 7 9 9 ...

Page 13: ... Microphone Note H 0 5 height of outdoor unit Model Noise Power dB A Noise level dB A FS2MIF 141AE2 FS2MIF 181AE2 FS3MIF 211AE2 FS3MIF 271AE2 FS4MIF 281AE2 FS4MIF 361AE2 FS5MIF 421AE0 65 65 68 66 68 68 56 5 57 5 59 5 60 63 5 62 60 54 13 ...

Page 14: ...ate before selecting the cable fuse and switch 7 3 Pipe length and the elevation Maximum piping length and height difference 1 drive 2 1 drive 3 1 drive 4 1 drive 5 Max length for all rooms m 30 45 60 75 Max length for one IU m 20 25 30 30 Max height difference between IU and OU m OU higher than IU 10 10 10 10 OU lower than IU 15 15 15 15 Max height difference between IUs m 10 10 10 10 Additional ...

Page 15: ...or unit A B C D E Liquid 6 35 1 4 Gas 9 52 3 8 12 7 1 2 7 4 Installation for the first time Air and moisture in the refrigerant system have undesirable effects as below Pressure in the system rises Operating current rises Cooling or heating efficiency drops Moisture in the refrigerant circuit may freeze and block capillary tubing Water may lead to corrosion of parts in the refrigerant system There...

Page 16: ...re 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 then tighten the flare nut again Make sure the pressure display i...

Page 17: ... to tighten the flare nut on the 2 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 va...

Page 18: ...harge 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 When the electronic scale displays the proper weight refer to the table disconnect the charge hose from the 3 way val...

Page 19: ...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 When the electronic scale displays the proper weight refer to the gauge and the pressure of the low side disconnect the charge hose from the 3 way ...

Page 20: ...vice 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 conditioner at the cooling cycle and stop it when the gauge indicates 0 1MPa 6 Set the 3 way valve to the closed position immediately Do this quickly so that the gau...

Page 21: ...the air use a torque wrench to tighten the flare nut on the 2 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...

Page 22: ...osition 2 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 ...

Page 23: ...ow 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 procedure 5 When the electronic scale displays the ...

Page 24: ... function In standby the LED displays In compressor operation the LED display the running frequency In defrosting mode The LED displays dF or alternative displays between running frequency and dF each displays 0 5s In compressor pre heating The LED displays PH or alternative displays between running frequency and PH each displays 0 5s During the oil return process The LED displays RO or alternativ...

Page 25: ...ndoor unit evaporator outlet temp T2BA If the temp is lower than 9 degree the digital display tube will show 9 If the temp is higher than 70 degree the digital display tube will show 70 If the indoor unit is not connected the digital display tube will show 18 B indoor unit evaporator outlet temp T2BB 19 C indoor unit evaporator outlet temp T2BC 20 D indoor unit evaporator outlet temp T2BD 21 E ind...

Page 26: ...ncy limit caused by T2 Bit3 Frequency limit caused by T3 Bit2 Frequency limit caused by T5 Bit1 Frequency limit caused by current Bit0 Frequency limit caused by voltage 43 Average value of T2 Sum T2 value of all indoor units number of indoor units in good connection cooling T2B heating T2 44 Outdoor unit fan motor state Fan off 0 High speed 1 Med speed 2 Low speed 3 Breeze 4 Super breeze 5 45 The ...

Page 27: ...p and display the failure 8 5 6 High condenser coil temp protection T3 Resume Off Decrease Hold 8 5 7 Outdoor unit anti freezing protection When T2 4 for 250 seconds or T2 0 the indoor unit capacity demand will be zero and resume to normal when T2 8 and the time of protection is no less than 3 minutes 8 5 8 Oil return Running rules 1 If the compressor frequency keeps lower than setting frequency f...

Page 28: ...l return 8 5 9 Low outdoor ambient temperature protection When compressor is off T4 is be lower than 35 for 10s the AC will stop and display LP When compressor is on T4 is be lower than 40 for 10s the AC will stop and display LP When T4 is no lower than 32 for 10s the unit will exit protection ...

Page 29: ...or free match indoor units O 7 IPM module malfunction 1 Over voltage or over low voltage protection 2 Too low ambient temperature protection 4 Inverter compressor drive protection 5 Mode conflict 6 Low pressure protection of compressor 7 O on X off flash at 2Hz For Malfunction Running lamp Timer lamp Defrosting lamp Open or short circuit of T1 temperature sensor X X Open or short circuit of T2 tem...

Page 30: ...n between indoor and outdoor units E1 X 2 Indoor fan speed has been out of control E3 X 4 Open or short circuit of T1 temperature sensor E4 X 5 Open or short circuit of T2 temperature sensor E5 X 6 Water level alarm EE X 8 Overcurrent protection For some units F0 O 1 Open or short circuit of T4 temperature sensor F1 O 2 Open or short circuit of T3 temperature sensor F2 O 3 Open or short circuit of...

Page 31: ...tlet temperature sensor or connector of sensor is defective F3 No C Indoor unit coil outlet temperature sensor or connector of sensor is defective F4 No D Indoor unit coil outlet temperature sensor or connector of sensor is defective F5 No E Indoor unit coil outlet temperature sensor or connector of sensor is defective P1 High pressure protection For P2 Low pressure protection For P3 Current prote...

Page 32: ...Trouble shooting 9 3 1 For the indoor unit 9 3 1 1 Indoor EEPROM malfunction EEPROM An electrically erasable programmable read only memory whose contents can be erased and reprogrammed using a pulsed voltage ...

Page 33: ...9 3 1 2 Indoor outdoor units communication error ...

Page 34: ... IPM or outdoor main PCB Self Check Power Operating Self Check Operating Pic 2 IPM or outdoor main PCB Pic 1 check the voltage of N to S Vs is it moving alternately between positive value and negative value ...

Page 35: ... PIC3 Main board LED when power on and unit standby PIC 4 check point button Press 1 time for check how many indoor units are connected ...

Page 36: ...f the voltage is less than 100V 208 240V power supply or 50V 115V power supply the PCB must have problems and need to be replaced 2 Indoor DC fan motor control chip is inside fan motor Power on and when 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 have problems and need t...

Page 37: ...type 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 For other types NO Color Signal Voltage 1 Red Vs Vm 192V 380V 2 3 Black GND 0V 4 White Vcc 13 5 16 5V 5 Yellow Vsp 0 6 5V 6 Blue FG 13 5 16 5V ...

Page 38: ... the connections between temperature sensor and PCB Are the connections good Correct the connections No Yes No Replace the sensor Replace the indoor PCB Measure the resistance value of the sensor via Appendix 1 Is it normal Yes 9 3 1 5 Full water malfunction ...

Page 39: ...9 3 2 For the super slim cassette with up down panel 9 3 2 1 Communication error between indoor unit and up down panel 9 3 2 2 Up down panel is defective F7 F8 ...

Page 40: ...9 3 3 For the outdoor unit 9 3 3 1 Outdoor EEPROM malfunction ODU E0 EEPROM An electrically erasable programmable read only memory whose contents can be erased and reprogrammed using a pulsed voltage ...

Page 41: ...9 3 3 2 Communication malfunction between IPM board and outdoor main board ODU E3 ...

Page 42: ...40VAC Check the power supply Check whether the voltage of IPM board P and N is normal DC277 356V for 18 27KBtu h DC277 410V for 36 42KBtu h Replace bridge rectifiers and then check whether the system can run normally Replace IPM board and then check whether the system can run normally Replace outdoor main board Yes No No No No Yes Trouble is solved Yes Yes ...

Page 43: ... 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 have problems and need to be replaced DC motor voltage input and output NO Color Signal Voltage 1 Red Vs Vm 140V 380V 2 3 Black GND 0V 4 White Vcc 13 5 16 5V 5 Yellow Vsp 0 6 5V 6 Blue FG 15V ...

Page 44: ...9 3 3 5 High pressure protection ODU P1 For FS4MIF 281AE2 FS4MIF 361AE2 FS5MIF 421AE0 ...

Page 45: ...essure protector No Whether the low pressure protector is broken Check whether the outdoor ambient temperature is too low No Stop the unit Yes Open fully valve core of high pressure valve No Check whether valve core of high pressure valve is opened Check if the indoor fan runs properly in cooling mode please refer to the solution of fan speed has been out of control malfunction Find out the cause ...

Page 46: ...9 3 3 7 Current protection of compressor ODU P3 ...

Page 47: ...essor discharge temp sensor and PCB according to wiring diagrams Measure the resistance value of compressor discharge temp sensor If the value is not normal is normal refer to the Appendix 2 No Yes Yes No Correct the wiring connection Stop leaking and add refrigerant Replace the compressor discharge temp sensor No Yes Replace high pressure valve assy Yes No Replace outdoor main PCB No Check whethe...

Page 48: ...heck whether the outdoor ambient temperature is higher than 50 No Stop the unit Yes Check if the outdoor unit ventilation is good Yes Make the outdoor unit ventilate well Check whether the heat exchanger is dirty No Clean the heat exchanger Yes Check whether the refrigerant system is ok Replace outdoor main board No Refrigerant is not enough add the refrigerant No Check if the outdoor fan runs pro...

Page 49: ...compressor check whether the system can work normally Check whether the lines in E part box are connected tightly Yes Connect it tightly check ok or not No No Yes No Replace the bridge rectifiers Check whether the bridge rectifiers are normal Use the multimeter to measure the resistance between each two terminals check whether there is the condition that value of resistance is 0 Check whether the ...

Page 50: ...el 1x2 14k 1x2 18k 1x3 21K 1x3 27K Compressor ASN108D22UEZ ASM135D23UFZ ASM135D23UFZ ATF235D22UMT Outdoor fan motor ZKFN 40 8 1L ZKFN 40 8 1L ZKFN 50 8 2 ZKFN 50 8 2 Model 1x4 28K 1x4 36K 1x5 42K Compressor ATF235D22UMT ATF310D43UMT ATF310D43UMT Outdoor fan motor ZKFN 120 8 2 ZKFN 120 8 2 ZKFN 120 8 2 FSKMI 181AE2 EU FSLMI 180AE2 9K 12K Wall mounted 18K Wall mounted 24K Wall mounted ZKFP 20 8 6 ZK...

Page 51: ...measure the resistance value with a tester Temperature Sensors Room temp T1 sensor Indoor coil temp T2 sensor Outdoor coil temp T3 sensor Outdoor ambient temp T4 sensor Compressor discharge temp T5 sensor Measure the resistance value of each winding by using the multi meter ...

Page 52: ... 34105 116 0 40060 3 41 5878 37 5 87359 77 1 29078 117 0 38991 2 39 8239 38 5 62961 78 1 25423 118 0 37956 1 37 1988 39 5 39689 79 1 21330 119 0 36954 0 35 2024 40 5 17519 80 1 17393 120 0 35982 1 33 3269 41 4 96392 81 1 13604 121 0 35042 2 31 5635 42 4 76253 82 1 09958 122 0 3413 3 29 9058 43 4 57050 83 1 06448 123 0 33246 4 28 3459 44 4 38736 84 1 03069 124 0 32390 5 26 8778 45 4 21263 85 0 9981...

Page 53: ... 5 234 9 35 35 78 75 8 084 115 2 422 4 222 8 36 34 32 76 7 82 116 2 357 3 211 4 37 32 94 77 7 566 117 2 294 2 200 7 38 31 62 78 7 321 118 2 233 1 190 5 39 30 36 79 7 086 119 2 174 0 180 9 40 29 15 80 6 859 120 2 117 1 171 9 41 28 81 6 641 121 2 061 2 163 3 42 26 9 82 6 43 122 2 007 3 155 2 43 25 86 83 6 228 123 1 955 4 147 6 44 24 85 84 6 033 124 1 905 5 140 4 45 23 89 85 5 844 125 1 856 6 133 5 4...

Page 54: ...mpressor checking Measure the resistance value of each winding by using the tester Position Resistance Value ASN108D22UEZ ASM135D23UFZ ATF235D22UMT ATF310D43UMT Blue Red 1 57Ω 20 1 75Ω 20 0 75Ω 20 0 65Ω 20 ...

Page 55: ...ce between P and UVWN UVW and N Digital tester Normal resistance value Digital tester Normal resistance value Red Black Several MΩ Red Black Several MΩ P N U N U V V W W Red 4 Indoor AC Fan Motor Measure the resistance value of each winding by using the tester Position Resistance Value YKSS 68 4 15 1 Weilng Black Red 285 8Ω 8 20 Red Yellow 178 5Ω 8 20 Yellow Blue 178 5Ω 8 20 ...

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