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SERVICE MANUAL

1. 12 Inverter current Actual data 13 EXV open angle for 1 indoor unit Actual data 8 14 EXV open angle for 2 indoor unit Actual data 8 15 EXV open angle for 3 indoor unit Actual data 8 16 EXV open angle for 4 indoor unit Actual data 8 17 Power supply of outdoor unit AD data 18 Indoor unit number The indoor unit can communicate with outdoor unit well 19 The last error or protection code 00 means no malfunction 20 frequency value Actual data 21 Ambient temp of 1 indoor unit Actual data 22 Condenser pipe temp of 1 indoor unit Actual data 23 Ambient temp of 2 indoor unit Actual data 24 Condenser pipe temp of 2 indoor unit Actual data 25 Ambient temp of 3 indoor unit Actual data 26 Condenser pipe temp of 3 indoor unit Actual data 27 Ambient temp of 4 indoor unit Actual data 28 Condenser pipe temp of 4 indoor unit Actual data 29 Check point over For F85MI 367HFD model Display Remark No of indoor units in good connection Actual data Outdoor unit running mode code Off 0 Cooling 2 Heating 3 Forced cooling 4 A indoor unit capacity B indoor unit capacity The capacity unit is horse power If the indoor unit is not C indoor unit capacit pe connected the digital display tube will show D indoor unit capacity E indoor unit capacity A Indoor unit capacity demand code B Indoor unit capacity demand code C Indoor unit capacity demand co
2. Check whether the wiring between PCB and PFC module is normal Replace the PFC inductance Replace outdoor e box 36 Annex 1 Characteristic of temp sensor Temp C Resistance KO Temp C Resistance KO Temp C Resistance KO 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 7 9708 57 2 6368 4 28 3459 31 7 6241 58 2 5397 5 26 8778 32 7 2946 59 2 4468 6 25 4954 33 6 9814 60 2 3577 7 24 1932 34 6 6835 61 2 2725 8 22 5662 35 6 4002 62 2 1907 9 21 8094 36 6 1306 63 2 1124 10 20 7184 37 5 8736 64 2 0373 11 19 6891 38 5 6296 65 1 9653 12 18 7177 39 5 3969 66 1 8963 13 17 8005 40 5 1752 67 1 830 14 16 9341 41 4 9639 68 1 7665 15 16 1156 42 4 7625 69 1 7055 16 15 3418 43 4 5705 70 1 6469 Annex 2 1 Reference voltage data 37 a Rectifier Input 220 230V AC output 310V DC b Inverter module U V W 3ph c Photo couple PC817 PC851 2 Check the Diode Bridge component In wiring diagram rectifier Result U V 60 150V
3. 12412 7 7 7 T4949 9 9 9 9 7 9 9 12 12 18 7 7 9 7 9 12 9 9 12 12 7 12 9 18 7 7 12 7412412 9 12 12 18 7 18 7 7 18 Note The 18k indoor unit should only be wall mounted unit And the 18k indoor unit 12 6 5 Indoor unit combination for FS4MI 277HFD One unit Two unit Three unit Four unit 7 7 7 9 9 12 12 7 7 7 7 9 12 9 9 9 7 7 7 7 7 7 9 9 7 9 9 12 9 7 9 9 12 12 18 7 7 9 7 9 18 9 9 12 7 7 7 9 7 74 9 12 74 9 12 12 12 7 12 9418 18 18 7 7 12 7 12 12 9 9 18 7 7 7 12 7 7 12 12 9 9 9 9 18 7 18 7 7 18 7 12 18 9 12 12 7 7 7 18 7 9 9 9 9 9 9 12 7 9 9 12 12 12 9 12 18 6 6 Indoor unit combination for F54MI 367HFD One unit Two unit Three unit Four unit 7 7 7 9 9 12412 7 7 7 7 12 12 9 12 18 7474747 7 7 12 12 7 9 12 18 9 9 12 12 9 7 9 9 12 12 18 7 7 9 7 12 18 9 18 18 7 7 7 9 7 7 12 18 7 9 18 18 9 9 12 18 12 7 12 9418 18 18 7 7 12 7418418 12 12 12 7 7 7 12 7 7 18 18 7412412412 9 12 12 12 18 7 18 7 7 18 9 9 9 12 12 18 7 7 7 18 7 9 9 9 7 12 12 18 9 12 12 18 7 9 9 9 9 12 12 18 18 T T 9 9 7 9 9 12 9 9 9 9 12 12 12 12 7 9 12 9 9 18 7 7 9 12 7 9 9 18 9 9 9 12 12 12 12 18 7 9 18 9 12 12 7 7 9 18 7 9 12 12 9 9 9 18 6 7 Indoor unit combination for FS5MI 367HFD One Unit T
4. 42 6 73 21 5 15 60 65 43 6 5 74 22 16 65 70 44 7 75 22 5 45 7 5 75 22 5 46 8 76 23 47 8 5 77 23 5 48 9 78 24 49 9 5 79 24 5 7 4 6 Opening degree of electronic expansion valve Opening degree equals the display data times 8 18 7 5 Protection 7 5 1 Three minutes delay at restart for compressor 7 5 2 Temperature protection of compressor discharge When the compressor discharge temp is getting higher the running frequency will be limited as below rules If 102 C lt T5 lt 115 C decrease the frequency to the lower level every 2 minutes till to F1 If T5 gt 115 C for 10 seconds the compressor will stop and restart till T5 lt 90 C 7 5 3 Under voltage protection VOLTAGE l No limit VOLREL1 VOLLIMT1 VOLFRE1 vos VOLLIMT2 VOLFREZ VOLREL3 VOLLIMT3 Mode VOLLIMT1 V VOLLIMT2 V VOLLIMT3 V VOLREL4 V VOLREL2 V VOLREL3 V VOLFRE1 Hz VOLFRE2 Hz FS2MI 147H FD 220 200 80 250 210 100 62 54 FS2MI 1 87H FD 230 200 120 260 210 135 62 54 FS3M 2 1 7H FD 245 220 80 265 240 100 78 45 FS3M I 277H FD 245 220 120 265 240 135 78 45 FSAMI 277H FD 221 210 80 260 225 100 62 54 FS4MI 367HFD 200 185 80 210 195 100 54 42 For FS5MI 367HFD VOLTAGE No limit VOLT_RST1_ADD VOLT_LTM1_ADD VOLT_LTM_FREQ1_ADD VOLT_RST2_ADD VOLT_LTM2_ADD VOLT LTM FREQ2 ADD VOLT RST1 ADD 210V VOLT LIM1 ADD 200V VOLT RST2 ADD 195V VOLT LIM2 ADD 185V
5. VOLT LIM FREQ1 ADD 54Hz VOLT LIM FREQ2 ADD 42Hz 19 7 5 4 Compressor current limit protection If the compressor current exceeds the current limit value for 10 seconds the compressor frequency will be limited as below table For models except FS5MI 367HFD Cooling mode Current frequency Hz Current limit value A Frequency limit COOL_F10 ICOOLLMT6 Decrease the frequency to COOL_F4 and COOL F9 ICOOLLMT5 run at COOL_F4 for 3 minutes COOLS ICCOEEMTS After that the frequency will be adjusted COOL F7 ICOOLLMT3 according to the capacity demand and rise COOL F6 ICOOLLMT2 to the upper level every 3 minutes When the frequency COOL F4 via COOL F5 ICOOLLMT1 capacity demand If the current frequency is lower than COOL_F4 the frequency will not be limited After 10s of the compressor start if the current gt ICOOL the AC will display the failure for 30 seconds and stop The AC will restart 3 minutes later Heating mode Current frequency Hz Current limit value A Frequency limit HEAT_F12 IHEATLMT8 Decrease the frequency to HEAT F4 and HEAT F11 IHEATLMT7 run at HEAT F4 for 3 minutes IED IMERTEMTO After that the frequency will be adjusted HEAT F9 IHEATLMT5 according to the capacity demand and rise HEAT F8 IIHEATLMT4 to the upper level every 3 minutes B When the frequency Heat F4 via capacity HEAT F7 IHEATLMT3 demand HEAT_F6 IHEATLMT2 HEAT_F5 IHEA
6. way valve normal working amp is less than 1A 7 2 6 Swing motor DC12V 7 3 Outdoor unit s digital display tube There is a digital display tube in outdoor PCB Digital display tube display function e In standby the LED displays e n compressor operation the LED display the running frequency e In defrosting mode The LED displays dF or alternative displays between running frequency and dF each displays 2s e n compressor pre heating The LED displays e In protection or malfunction the LED displays error code or protection code 7 4 Outdoor unit point check function There is a check switch in outdoor PCB Push the switch SW1 to check the states of unit when the unit is running The digital display tube will display the follow procedure when push SW 1 each time For units except FS5MI 367HFD model Display Remark 1 Indoor unit capacity demand code 2 Outdoor unit running mode code Off 0 Cooling 1 Heating 2 3 Amendatory capacity demand code 4 Outdoor unit fan motor state Off 0 Low speed 1 High speed 2 5 Evaporator outlet temp for 1 indoor unit Actual data 6 Evaporator outlet temp for 2 indoor unit Actual data 7 Evaporator outlet temp for 3 indoor unit Actual data 8 Evaporator outlet temp for 4 indoor unit Actual data 9 Condenser pipe temp Actual data 10 Ambient temp Actual data 11 Compressor discharge temp Actual data 14
7. AC U W 60 150V AC V W 60 150V AC P N DC 310V Control side lt 5V AC side lt 24V AC d S terminal and N changeable from 0 24V Remark If this part is abnormal the LED will not light Multi meter Result Forward Resistance Backward Resistance Infinite Infinite on 500 ohm Infinite m m 500 ohm Infinite
8. D RECT IF ILER2 VET ILRI FAN CAPACITOR R293 OPTIONAL Uzed in 202057190098 elinsiet ing Wit sal ELECTRONIC ELECTRONIC ELECTRONIC ELECTRONIC ERAS INE EXPANSIVE EXPANSIVE EXPAG IE gent VAVEA VALEE VANE C VAVED OPTIONAL Uced in WAN EAD ewm Cool inglHest ing Unit only RECTIF LER2 FTIF ILB FAN CAPACITOR 202057390015 DE Gool ingllieating Unit only 4 5 FS4MI 367HFD 202057190159 ELECTRONIC ELECTRONIC ELECTRONIC ELECTRONIC EXPANSIVE EXPANSIVE EXPAIGIVE EPANS E COMPRESSOR VALVE A VALVE B VANEC VALVE D e TT ae FAN CAPACI TOR HEATER ELECTRONIC ELECTRONIC ELECTRONIC ELECTRONIC ELECTRONIC 202057190147 EXPANSIVE OVER EXPANSIVE EXPANSIVE EXPANSIVE VALVE E VALEO VAVEB VALVE A COMPRESSOR ZNA SZ di zij KJ DZ H Ys Gi YG PG h ja vs EOS vvv 4MAYS VALVE RD HIER Cod fr REOTIFILER2 FAN CAPACITOR 5 Refrigeration Cycle Diagram 5 1 Refrigeration circuit drawing of inverter binary type Outdoor Unit Auxiliary Capillary A Capillary B Indoor pipe out temp sensor A Indoor pipe out temp sensorB 4 2 Refrigeration circuit drawing of inverter trinary type fiow fan Evaporator Cross flow fan Indoor Unit Er Outdoor Unit 5 3 Refrigeration circuit drawing of inverter quadplex type 4 way valve Axial flow fan Auxiliary il Exhaust Ca
9. ECOILFRE 48Hz Te 90 Tf 100 For other models RECOILINFRE 50Hz RECOILFRE 62Hz Te 120 Tf 180 2 During the Tf seconds the EXV and indoor units keep the current running mode except FS5MI 367HFD model the frequency will not be limited by the compressor discharge temp and the current For FS5MI 367HFD model the EXV will keep 300p while the indoor units will keep the current running mode 3 If the outdoor ambient is higher than 15 C during the oil return the AC quit oil return 7 5 9 Compressor preheating functions Preheating permitting condition If T4 outdoor ambient temperature lt 3 C and the machine connects to power supply no longer than 5 seconds or if T4 lt 3 C and compressor has stopped for over 3 hours the compressor heating cable will work Preheating mode A weak current flow through the coil of compressor from the wiring terminal of compressor then the compressor is heated without operation Preheating release condition If T4 5 C or the compressor starts running preheating function will stop 7 5 10 Compressor crankcase heater When T4 lt 3 C and the compressor is not running the crankcase heater will be active When T425 C or the compressor starts up the crankcase heater will stop work For FS5MI 367HFD T4 28 C 22 8 Troubleshooting 8 1 Indoor unit error code explanation Wall mounted series Display LED STATUS EO EEPROM error E1 C
10. SSD Fishex Aircon Solutions Ltd SERVICE MANUAL Room Air Conditioner Multi Split type Outdoor unit R410A DC Inverter FS2MI 147HFD FS2MI 187HFD FS3MI 217HFD FS3MI 277HFD FSAMI 277HFD FSAMI 367HFD FS5MI 367HFD NOTE Before servicing the unit please read this at first Always contact with your service center if meet problem FI SM MULTI DC INVERTER OUTDOOR 20120912 2 CONTENTS General information of Outdoor Units 3 GAUS cm 4 Dimensions eec 5 m Wiring Diagram e 6 Refrigeration Cycle Diagram 9 Indoor units combination 11 Electronic control function nnen eeen nennen eneen 13 roubleshooting U U U U Ta ss innado 22 General information of Outdoor Units Dimension Net Gross weight Model name mm kg Compressor t ae 760 590 285 39 41 DA108X1C 20FZ3 FS2MI 187HFD 845 700 320 51 55 DA130S1C 20FZ FS3MI 217HFD 845 700 320 59 64 DA130S1C 20FZ FS3MI 277HFD 845 700 320 57 60 5 DA150S1C 20FZ FN 900 860 315 73 78 TNB220FLHMC L bapa asa 990 965 345 86 90 TNB306FPGM FS5MI 367HFD 990 965 345 86 5 91 TNB306FPGM 2 Features Outdoor unit Power relay control Low noise air flow system Hydrophilic aluminum fin The hydrophilic fin can improve the heating effic
11. TLMT1 If the current frequency is lower than HEAT_F4 the frequency will not be limited After 10s of the compressor start if the current gt IHEAT the AC will display the failure for 30 seconds and stop The AC will restart 3 minutes later For FS5MI 367HFD model Cooling mode Current frequency Current limit value A Frequency limit Hz COOL_F16 ICOOLLMT12 Decrease the frequency to COOL_F4 and run at COOL F15 ICOOLLMT11 COOL_F4 for 3 minutes COOL_F14 ICOOLLMT10 After that the frequency will be adjusted according to COOL F13 ICOOLLMT9 EM demand and rise to the upper level every COOL F12 ICOOLLMT8 When the frequency gt COOL_F4 via capacity COOL F11 ICOOLLMT7 demand COOL F10 ICOOLLMT6 COOL_F9 ICOOLLMT5 20 COOL_F8 ICOOLLMT4 COOL_F7 ICOOLLMT3 COOL_F6 ICOOLLMT2 COOL_F5 ICOOLLMT1 If the current frequency is lower than COOL F4 the frequency will not be limited After 10s of the compressor start if the current gt ICOOL the AC will display the failure for 30 seconds and stop The AC will restart 3 minutes later Heating mode Current frequency Current limit value CA Frequency limit Hz HEAT F16 IHEATLMT12 Decrease the frequency to HEAT F4 and run at HEAT F4 for 3 minutes HEAT F15 IHEATLMT11 HEAT F14 IHEATLMT10 After that the frequency will be adjusted according to t
12. de Ble ml ol O S N Of oy A Q N D Indoor unit capacity demand code N E Indoor unit capacity demand code Ww Total indoor units amendatory capacity demand code The frequency corresponding to the total indoor units amendatory capacity demand 15 The frequency after the frequency limit 16 The frequency sending to compressor control chip 17 A indoor unit evaporator outlet temp T gt sA 18 B indoor unit evaporator outlet temp T gt sB 19 C indoor unit evaporator outlet temp T28C 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 21 E indoor unit evaporator outlet temp T23E tube will show 70 If the indoor unit is not connected the digital display tube will show is 20 D indoor unit evaporator outlet temp T28 22 A indoor unit room temp T4A 23 B indoor unit room temp T4B 24 C indoor unit room temp T4C 15 25 D indoor unit room temp T4D E 7 28 29 If the temp is lower than 9 degree the digital display tube will A tube will show 70 f the indoor unt is not connected the digital 31 display tube will show 22 34 Compressor discharge temp Tp The display value is between 30 120 degree If the temp is lower than 30 degree the digital display tube will show 30 If the temp is higher than 99 degree the digital display
13. he capacity demand and rise to the upper level every HEAT F13 IHEATLMT9 3 minutes HEAT_F12 IHEATLMT8 When the frequency gt Heat_F4 via capacity demand HEAT_F11 IHEATLMT7 HEAT F10 IHEATLMT6 HEAT F9 IHEATLMT5 HEAT F8 IHEATLMT4 HEAT F7 IHEATLMT3 HEAT F6 IHEATLMT2 HEAT F5 IHEATLMT1 If the current frequency is lower than HEAT F4 the frequency will not be limited After 10s of the compressor start if the current gt IHEAT the AC will display the failure for 30 seconds and stop The AC will restart 3 minutes later 6 5 5 Indoor outdoor units communication protection If the indoor units can not receive the feedback signal from the outdoor units for 2 minutes the AC will stop and display the failure 7 5 6 High condenser coil temp protection When T3 gt 65 C for 3 seconds the compressor will stop while the indoor fan and outdoor fan will continue When T3 lt 52 C the protection will release and the compressor will restart after 3 minutes 7 5 7 Outdoor unit anti freezing protection When T2B lt 0 C for 250 seconds the indoor unit capacity demand will be zero and resume to normal when T2B gt 10 C 7 5 8 Oil return Running rules 1 f the compressor frequency keeps lower than RECOILINFRE for Te minutes the AC will rise the frequency to RECOILFRE for Tf seconds and then resume to former frequency For FS4MI 367HFD 21 RECOILINFRE 45Hz RECOILFRE 48Hz Te 120 Tf2180 For FS5MI 367HFD RECOILINFRE 45Hz R
14. iency at operation mode 4 way valve control It is only operated in the heating operation mode except defrosting operation Anti rust cabinet Valve protection cover It protects the valves and prevents water from dripping Discharge pipe temperature protection Compressor crankcase heater 3 Dimensions More than 30cm More than 60cm Service space E More than 30cm d ed More than 60cm lt More than 70cm Air inlet I P Air inlet MODEL W D H W1 A B FS2MI 147HFD 760 285 590 823 530 290 FS2MI 187HFD 845 320 700 908 560 335 FS3MI 217HFD 845 320 700 908 560 335 FS3MI 277HFD 845 320 700 908 560 335 FS4MI 277HFD 900 315 860 980 590 333 FS4MI 367HFD 990 345 965 1075 624 366 FS5MI 367HFD 990 345 965 1075 624 366 4 Wiring Diagram 4 1 FS2MI 147HFD ELECTRONIC ELECTRONIC EXPANSIVE EXPANSI VE VALVE A VALE B WAIN BOARD lt E EPA EXPANSIVE EXPANS WE VAEA VER JOLIE C we ha PG Oo OPTIONAL Used in Cool in glHeating Unit on HAN BOARD RECTIF lLER2 FAN CAPACITOR OPTIONAL Used in Ri Coolin Heating Unit only 202057090093 4 3 FS3MI 277HFD me we PA jv OPTIONAL Used in ws LIE Coolingliest ing Unit only HAIN BOAR
15. lowly High low pressure stop valve Error disappear opened completely or not High pressure range No during unit operating is i correct Drop redundant refrigerant The wire between pressure No switch and main board works well Replace it Error disappear Pressures switch work well Replace high pressure switch p Error disappear piping filter accumulator 4 way Error disappear and EXV work well Is pipe blocked drop refrigerant blow pipe recharge with refrigerant 32 8 3 10 Low pressure protection Outdoor master unit display P2 indoor unit alarm lamp flash slowly High low pressure stop valve opened completely or not Error disappear Low pressure range during unit operating is correct Charge refrigerant Yes The wire between pressure No Switch and main board works Repiace wire Error disappear well No Pressures switch L Replace pressure switch Error disappear work well piping filter accumulator p Error disappear 4 way and EXV work well Is pipe blocked drop refrigerant blow pipe recharge with refrigerant 33 8 3 11 Compressor current protection Check the resistance of compressor is it normal The compressor is defective Turn one indoor unit only Does the compressor start No after 3 minutes Yes TEE The compressor is defective Does the trouble occur again after compresso
16. mode 2 Heating mode 7 4 3 Capacity demand Cooling mode 16 Capacity 2000 2 2000 2 3000 3 4500 5 5000 5 5500 6 6100 7 7000 7 7500 8 gt 7500 500 500 800 000 500 100 000 500 000 Correspondi 1 2 3 4 5 6 7 8 9 gt 10 ng Code Heating mode Capacity 2000 2 2000 2 3000 3 4500 5 5500 6 6100 7 6100 7 7000 7 7500 8 gt 8000 500 500 800 000 100 000 000 500 000 Correspondin 1 2 3 4 5 6 7 8 9 10 gt 11 g Code Note The capacity is just for reference 7 4 4Number of indoor unit Display Number of indoor unit 1 1 2 2 3 3 7 4 5 Outdoor ambient temp 17 Display Corresponding temp Display Fed Display M ds 15 7 5 50 10 80 25 16 7 51 10 5 81 25 5 17 6 5 52 11 82 26 18 6 53 11 5 83 26 5 19 5 5 53 11 5 84 27 20 5 54 12 85 27 5 21 4 5 55 12 5 86 28 22 4 56 13 87 28 5 23 3 5 57 13 5 88 29 24 3 58 14 89 29 5 26 2 59 14 5 90 30 27 1 5 60 15 91 30 5 28 1 61 15 5 92 31 29 0 5 62 16 93 31 5 30 0 63 16 5 93 31 5 31 0 5 63 16 5 94 32 32 1 64 17 95 32 5 33 1 5 65 17 5 96 33 34 2 65 17 5 97 33 5 35 2 5 66 18 98 34 36 3 67 18 5 99 34 5 37 3 5 68 19 10 35 40 38 4 69 19 5 11 40 45 39 4 5 70 20 12 45 50 40 5 71 20 5 13 50 55 41 5 5 72 21 14 55 60
17. ommunication error between indoor and outdoor unit E2 Zero crossing examination error E3 Fan speed beyond control E5 Outdoor units temp sensor or connector of temp sensor is defective E6 Indoor units temp sensor or connector of temp sensor is defective PO Inverter module protection P1 Outdoor voltage protection P2 Compressor temp protection P3 Compressor current protection P4 Inverter compressor drive error Duct Cassette Ceiling amp Floor series Operation Timer De frost Alarm LED STATUS X gt X Indoor room temp sensor open or short circuit Indoor pipe temp sensor open or short circuit Indoor and outdoor communication error Water level alarm EEPROM error Inverter module protection Outdoor sensor open or short circuit Outdoor voltage protection Compressor top temp protection Mode conflict eo f X X XI X x gt x x x x x xx xxx gt x x gt gt Outdoor current protection flash light X extinguished Console 7k9k12k 23 Operation Timer De frost State X X Indoor room temp sensor open or short circuit Indoor pipe temp sensor open or short circuit Indoor and outdoor communication error Water level alarm EEPROM error Inverter module protection Outdoor sensor open or short circuit Compressor top
18. or FS5MI 367HFD model Disconnect the power supply after 1 minute connect the power supply turn on the unit with remote controller Check the wiring between indoor and outdoor unit Is the connection of L N S and GND good Is the GND connection on outdoor PCB good NP Reconnect and retest ia Is the LED4 red on outdoor PCB bright and LED1 yellow blinking Replace indoor PCB and repower on Is the failure cleared The power supply for outdoor PCB is fail Check the wiring on outdoor PCB comparing with wiring plate Is the connection good n Correct the connection Replace outdoor e box 27 8 3 3 Zero crossing signal error Is power supply and Be sure the power su pply connection of is good and correct the connectors good connection Indoor PCB is defective Replace the indoor PCB 8 3 4 Fan speed out of control diagnosis Shut off the power supply and turn on it 5s later The unit does not work normally Turn off the unit rotate the indoor Disassemble the connection fan Does it rotate freely between fan and motor check if the bearing is normal If not change the bearing If yes follow the below step Is the indoor fan motor connector and connection good Check the voltage of motor power input Is it in range of AC90 160V Replace the indoor fan motor Replace the indoor PCB 28 8 3 5 Open or short circuit of tem
19. perature sensor diagnosis and solution Check the connections between the sensors and the PCB Are the connections good Yes Replace the sensor and check if Yes the errors happen again Replace outdoor PCB 8 3 6 Compressor voltage protection Check the voltage of power supply if the voltage is about 220V turn off the power supply to indoor unit and turn it on again after 1 minute Does the trouble occur again Check the voltage of P N port in IPM board If it is not higher than 310V follow the below step No Replace the IPM board 29 8 3 7 Communication malfunction between outdoor main chip and compressor control chip Check whether the IPM board has error display Replace the outdoor PCB Replace the IPM board No No Replace the electric control box 30 8 3 8 Temperature protection of compressor discharge or compressor top Does compressor operate Is refrigerant circulation volume normal Charge refrigerant Is abnormality the same after gas charging No Is the connection Reconnect and retest good Is rotector normal Replace the protector Check the outdoor main PCB Is there some problem Replace the outdoor PCB Check refrigerant system such as clogging of capillary etc 31 8 3 9 High pressure protection Outdoor master unit display P1 indoor unit alarm lamp flash s
20. pillary temp sensor Condenser Coiltemp Valve sensor 2 Q YW l Compressor oh d Lae j Axia T Liquid valve CapileyA xV A iquid va ET Adan x L P d pile i Exhaust Mair FaterA temp senso Di Ss eee n Capillary ad Cspilery B XV B Liquid valve B EL du gt oo Sk Check FiterB L B 1 Condense Coil temp Vale Capilary C P Xv C Liquid valve C gt Evgporsto Pus 2 nen OS En gt i pe Fiter C ig li Indoor pipe out temp sensor A asvalve A A lt Indoor pipe out Compressor temp sensor B Gss valve E XI a Indoor pipe out temp sensor C Gas valve C AM OK Indoor Unit CapilaryA TEXVA a valve A OI DS Filter A Capillary B TEXVB Liquid valve B Main A ST xb Capillary O Filter B Capillary C TEXV C Liquid valve C Hak Fitter C 5 Capillary D LEXVD Liquid valve D GS DOK e E Fitter D 9 S e LL Indoor pipe out temp E gta TT Gas valve A LA Indoor pipe out temp on qx zd Gas valve B E 5 Indoor pipe out temp sensor C Gas valve C EN Ei eI Indoor pipe out temp Gas valve D sor D as valve DK Indoor Unit Outdoor Unit 10 5 4 Refrigeration circuit drawing of inverter quintuple type Axial flow fan Condenser Exhaust temp sensor Coil temp 4 way sensor valve Compressor Auxiliary Capillary Check Valve Main Capillary Ca
21. pillary A EXV A Liquid valve A Filter A Capillary B EXVB Liquid valve B Filter B Capillary C EXV C Liquid valve C Filter C Capillary D ExvD Liquid valve D FitterD Capillary E EXVE Liquid valveE FilerE cac bibe Gas valve A temp sensor A Indoor pipe out temp sensor B Gas valve B Indoor pipe out temp sensor C Gas valve C Indoor pipe out temp sensor D Gas valve D Indoor pipe out temp sensorE Gas valve E Outdoor Unit Cross flow fan hm am Indoor Unit 6 Indoor units combination 6 1 Indoor unit combination for FS2MI 147HFD One unit Two unit 7 7 7 9 9 9 7 9 9 12 12 7 12 Note There should be no more than one cassette or duct or console or ceiling amp floor unit 6 2 Indoor unit combination for FS2MI 187HFD One unit Two unit 7 7 7 9 9 9 7 9 9 12 12 7 12 12 12 18 7 18 Note The 18k indoor unit should only be wall mounted unit 6 3 Indoor unit combination for FS3MI 217HFD One unit Two unit Three unit 7 7 7 9 9 7 7 7 7 9 12 9 7 9 9 12 THT 9 9 9 9 12 7 12 9 18 7 7 12 949412 18 7 18 12412 7 9 9 Note There should be no more than one cassette or duct or console or ceiling amp floor unit should only be wall mounted unit 6 4 Indoor unit combination for FS3MI 277HFD One unit Two unit Three unit 7 7 7 949
22. r running some time Check the refrigerant circulation volume and pressure Yes If refrigerant circulation volume and pressure is OK change the outdoor main PCB 34 8 3 12 Inverter module protection Are the U V W connected to compressor and inverter module right Yes Replace the IPM board Repair connector If the problem comes to again check wingding resistance of inverter compressor is it right No Replace inverter compressor 8 3 13 Condenser high temperature protection When outdoor pipe temp is more than 65 C the unit will stop and unit runs again when outdoor pipe temp less than 52 C Is the outdoor pipe temp more than 65 C No Is the outdoor pipe temp sensor right according to the annex 1 Yes Replace the outdoor pipe temp sensor Replace the outdoor main board 35 8 3 14 PFC module protection Check the voltage of power supply if the voltage is about 220V turn off the power supply and turn it on again after 1 minute Does the unit work normally Check whether the power supply of bridge rectifiers input port is normal No Replace the outdoor PCB Check whether the power supply of bridge rectifiers output port is 325VDC No Replace bridge rectifiers Check whether the PFC inductance is normal Check whether the voltage between P and N port in IPM is 380V Replace PFC
23. temp protection f f He X X X gt x x x Xt gt tx Mode conflict Console 18k flash light X extinguished Operation Timer De frost State X Indoor temp sensor open or short circuit Indoor and outdoor communication error Water level alarm EEPROM error Outdoor unit is abnormal x gt x e KX Xx XIX AP Mode conflict flash 6 light X extinguished 8 2 Outdoor unit error code explanation 24 For units except FS5MI 367HFD Display LED STATUS EO EEPROM error E1 No A Indoor unit coil outlet temp sensor or connector of sensor is defective E2 No B Indoor unit coil outlet temp sensor or connector of sensor is defective E3 No C Indoor unit coil outlet temp sensor or connector of sensor is defective E6 No D Indoor unit coil outlet temp sensor or connector of sensor is defective E4 Outdoor unit temp sensor or connector of temp sensor is defective E5 Compressor voltage protection E7 Communication malfunction between outdoor main chip and compressor control chip Temperature protection of compressor discharge or compressor top ne For FS4MI 367HFD it only means compressor discharge temp protection P1 High pressure protection only for FS4MI 367HFD P2 Low pressure protection only for FS4MI 367HFD P3 Compressor current protection P4 In
24. tube will show single digit and tens digit For example the digital display tube show 0 5 it means the compressor discharge temp is 105 degree 35 AD value of current The display value is hex number 36 AD value of voltage iod 37 EXV open angle for A indoor unit Actual data 4 38 EXV open angle for B indoor unit If the value is higher than 99 the digital display tube will show 39 EXV open angle for C indoor unit single digit and tens digit 40 EXV open angle for D indoor unit For example the digital display tube show 2 0 it means the EXV open angle is 120X 4 480p 41 EXV open angle for E indoor unit B O medspay value is hex Frequency limit caused by T4 example the digital display Bit4 Frequency limit caused by T2 tube show 2A then Bit5 1 Bit3 Frequency limit caused by T3 Bit3 1 Bit1 1 aa It means Frequency limit caused by Tp frequency limit u caused by Frequency limit caused by current T4 T3 and Frequency limit caused by voltage Current 42 Frequency limit symbol 43 Average value of T2 Sum T2 value of all indoor units indoor units number 44 Outdoor unit fan motor state Off 0 High speed 1 Med speed 2 Low speed 3 45 The last error or protection code 00 means no malfunction 7 4 1 Frequency of compressor Display Frequency of compressor Hz 30 30 Stand by 60 60 7 4 2 Running mode Display Corresponding mode 0 Off 1 Cooling
25. verter module protection P6 Condenser high temperature protection 25 For FS5MI 367HFD model Display LED STATUS EO EEPROM error E2 Communication malfunction between outdoor unit and indoor units E3 Communication malfunction between outdoor main chip and compressor control chip E4 Outdoor unit temp sensor or connector of temp sensor is defective E5 Compressor voltage protection E6 PFC module protection F1 No A Indoor unit coil outlet temp sensor or connector of sensor is defective F2 No B Indoor unit coil outlet temp sensor or connector of sensor is defective F3 No C Indoor unit coil outlet temp sensor or connector of sensor is defective F4 No D Indoor unit coil outlet temp sensor or connector of sensor is defective F5 No E Indoor unit coil outlet temp sensor or connector of sensor is defective P0 Compressor top temperature protection P1 High pressure protection P2 Low pressure protection P3 Compressor current protection P4 Compressor discharge high temperature protection P5 Condenser high temperature protection P6 Inverter module protection 26 8 3Trouble shooting 8 3 1 EEPROM parameter error diagnosis and solution Shut off the power supply and turn on it 5s later The problem comes out again Is the EEPROM chip plugged in PCB well Correct the connection Replace the PCB 8 3 2 Indoor outdoor units communication protection Only f
26. wo Unit Three Unit 7 7 7 9 12 T T T 7 9 18 9 9 18 12 18 18 9 7 9 9 18 7 7 9 7 12 12 9 12 12 18 18 18 12 7 12 12 12 7 7 12 7 12 18 9 12 18 18 7 18 12 18 7 7 18 7 18 18 9 18 18 9 9 18 18 7 9 9 9 9 9 12 12 12 7 9 12 9 9 12 12 12 18 Four Unit 7 7 7 7 7 7 9 18 7 9 9 18 7 12 18 18 9 9 18 18 7 7 7 9 7 7 12 12 7 9 12 12 9 9 9 9 9 12 12 12 7 7 7 12 7 7 12 18 7 9 12 18 9 9 9 12 9 12 12 18 7 7 7 18 7 7 18 18 7 9 18 18 9 9 9 18 12 12 12 12 7 7 9 9 7 9 9 9 7 12 12 12 9 9 12 12 12 12 12 18 7 7 9 12 7 9 9 12 7 12 12 18 9 9 12 18 Five Unit 7 7 7 7 7 7 7 7 9 18 7 7 9 12 18 7 9 9 12 18 9 9 9 12 12 7 7 7 7 9 7 7 7 12 18 7 7 12 12 18 7 9 12 12 12 9 9 9 12 18 7 7 7 7 12 7 7 7 18 18 7 9 9 9 9 7 9 12 12 18 9 9 12 12 12 7 7 7 7 18 7 7 9 9 9 7 9 9 9 12 9 9 9 9 9 9 12 12 12 12 7 7 7 9 9 7 7 9 9 12 7 9 9 9 18 9 9 9 9 12 12 12 12 12 12 7 7 7 9 12 7 7 9 9 18 7 9 9 12 12 9 9 9 9 18 13 7 Electronic control function 7 1 Abbreviation T1 Indoor ambient temperature T2 Coil temperature of indoor heat exchanger middle T2B Coil temperature of indoor heat exchanger outlet T3 Coil temperature of outdoor heat exchanger T4 Outdoor ambient temperature T5 Compressor discharge temperature Ts Setting temp 7 2 Electric Control working environment 7 2 1 Input voltage 190 264V 7 2 2 Input power frequency 50Hz 7 2 3 Indoor fan normal working amp is less than 1A 7 2 4 Outdoor fan Normal working amp is less than 1 5A 7 2 5 Four

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