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Fisher FS2MIF-141AE2 Service Manual

Dc inverter multi split outdoor units
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SERVICE MANUAL
Room Air Conditioner
DC Inverter Multi Split Outdoor
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.
units
FI_SM_MULTI OUTDOOR FS2-3-4-5MIF--1AE2_161205

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Summary of Contents for Fisher FS2MIF-141AE2

  • Page 1 SERVICE MANUAL Room Air Conditioner DC Inverter Multi Split Outdoor 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: Table Of Contents

      CONTENTS 1. General information of Outdoor Units ........3   2. Features ................4   3. Dimensions ................ 5   4. Refrigeration Cycle Diagram ........... 6   5. Wiring diagram ..............8   6. Indoor units combination ..........11  ...

  • Page 3: General Information Of Outdoor Units

      General information of Outdoor Units Model name Dimension (mm) Compressor FS2MIF-141AE2 800x333x554 ASN108D22UEZ  FS2MIF-181AE2 800x333x554 ASM135D23UFZ  FS3MIF-211AE2 845x363x702 ASM135D23UFZ  FS3MIF-271AE2 845x363x702 ATF235D22UMT  FS4MIF-281AE2 946x410x810 ATF235D22UMT  FS4MIF-361AE2 946x410x810 ATF310D43UMT  FS5MIF-421AE0 946x410x810 ATF310D43UMT   ...

  • Page 4: Features

      Features Outdoor unit Power relay control Low noise air flow system Hydrophilic aluminum fin The hydrophilic fin can improve the heating efficiency 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.

  • Page 5: Dimensions

      Dimensions FS2MIF-141AE2 FS2MIF-181AE2 Unit：mm Model FS2MIF-141AE2 FS2MIF-181AE2 FS3MIF-211AE2 FS3MIF-271AE2 FS4MIF-281AE2 1034 1034 FS4MIF-361AE2 FS5MIF-421AE0 1034  ...

  • Page 6: Refrigeration Cycle Diagram

      Refrigeration Cycle Diagram 4.1 Refrigeration circuit drawing of inverter 1 drive 2 type INDOOR OUTDOOR EXV A CAPILIARY A LIQUID VALVE A CHECK VALVE EXV B CAPILIARY B LIQUID VALVE B Condenser temp. sensor CAPILIARY TUBE HEAT HEAT EXCHANGE T4 Ambient T1 Room EXCHANGE...
  • Page 7   4.3 Refrigeration circuit drawing of inverter 1 drive 4 type INDOOR OUTDOOR EXV A CAPILIARY A LIQUID VALVE A EXV B CAPILIARY B LIQUID VALVE B CHECK VALVE EXV C CAPILIARY C LIQUID VALVE C Condenser temp. sensor EXV D CAPILIARY D CAPILIARY TUBE LIQUID VALVE D HEAT...

  • Page 8: Wiring Diagram

      Wiring diagram FS2MIF-141AE2 FS2MIF-181AE2 FS3MIF-211AE2 FS3MIF-271AE2  ...
  • Page 9 FS4MIF-281AE2   FS4MIF-361AE2  ...
  • Page 10   FS5MIF-421AE0   -10-...

  • Page 11: Indoor Units Combination

      Indoor units combination Indoor unit combination for FS2MIF-141AE2 One unit Two unit 9+12 7+12 Indoor unit combination for FS2MIF-181AE2 One unit Two unit 9+12 7+12 9+18 7+18 12+12 Indoor unit combination for FS3MIF-211AE2 One unit Two unit Three unit...
  • Page 12 Indoor unit combination for FS4MIF-361AE2   One unit Two unit Three unit Four unit 7+24 7+7+18 9+12+18 7+7+7+7 7+7+9+24 7+9+12+12 9+9+12+12 7+12+18 9+24 9+12+24 7+7+24 7+7+7+9 7+7+12+12 7+9+12+18 9+9+12+18 7+12+24 12+18 9+18+18 7+9+12 7+7+7+12 7+7+12+18 7+9+18+18 9+12+12+12 7+18+18 7+9+18 9+9+12 7+7+7+18 7+7+18+18 7+12+12+12...

  • Page 13: Sound Levels

      Sound Levels Outdoor Unit Microphone 1.0m Note: H= 0.5 × height of outdoor unit Model Noise Power dB(A) Noise level dB(A) FS2MIF-141AE2 56,5 FS2MIF-181AE2 57,5 FS3MIF-211AE2 FS3MIF-271AE2 59,5 FS4MIF-281AE2 FS4MIF-361AE2 63.5 FS5MIF-421AE0   -13-...

  • Page 14: Installation Details

    3500(357kgf.cm) 3600(367kgf.cm) 7.2 Connecting the cables The power cord of connect should be selected according to the following specifications sheet. Model Nominal cross-sectional area (mm²) FS2MIF-141AE2 FS2MIF-181AE2 3 x 2,5 3 x 2,5 FS3MIF-211AE2 FS3MIF-271AE2 3 x 2,5 FS4MIF-281AE2 FS4MIF-361AE2 FS5MIF-421AE0...
  • Page 15   ● Refrigerant pipe diameter is different according to indoor unit to be connected. When using the extension pipe, refer to the tables below. ● When refrigerant pipe diameter is different from that of outdoor unit union (for 18K indoor unit), additional transfer connector needs to be used on outdoor unit union.
  • Page 16   1. Air purging with vacuum pump (Indoor unit) (Outdoor unit) (Liquid side) Two-way valve Close (Gas side) Three-way valve Close Manifold valve Compound meter Pressure gauge -0.1MPa Handle Lo Handle Hi Charge hose Charge hose Vacuum pump 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.
  • Page 17   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 valve. 3). Air purging. Open the valves on the charging cylinder and the charge set.
  • Page 18   3. Adding the refrigerant if the pipe length >5m Electronic scale 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.
  • Page 19   7.5 Adding the refrigerant after running the system for many years Electronic scale Procedure: 1). Connect 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.
  • Page 20   7.6 Re-installation while 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.
  • Page 21   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.
  • Page 22   7.7 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).
  • Page 23   2. Refrigerant charging 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.

  • Page 24: Electronic Control Function

      Electronic control function 8.1 Abbreviation T1: Indoor ambient temperature T2: Coil temperature of indoor heat exchanger middle. T2B: Coil temperature of indoor heat exchanger outlet(This sensor is located in outdoor unit) T3: Coil temperature of outdoor heat exchanger T4: Outdoor ambient temperature T5: Compressor discharge temperature Ts: Setting temperature 8.2 Electric control working environment.
  • Page 25   8.4 Outdoor unit point check function There is a check switch in outdoor PCB. Press the switch N times it will display the content corresponding to No. N. After getting into the check function, it will display No. N with 1.5s, meanwhile the low bit decimal of digit display flashing, indicated to get into the check function display.
  • Page 26   AD value of voltage For example ,the digital display tube show “Cd”, it means AD value is 205. EXV open angle for A indoor unit Actual data/4. EXV open angle for B indoor unit If the value is higher than 99, the digital display tube will show single EXV open angle for C indoor unit digit and tens digit.
  • Page 27   8.5.4 Compressor current limit protection Temperature interval.of current limit is same as range of T4 limited frequency. Cooling mode: CoolZone5 CoolZone4 CoolZone3 CoolZone2 CoolZone1 Heating mode: HeatZone4 HeatZone3 HeatZone2 HeatZone1 8.5.5 Indoor / outdoor units communication protection If the indoor units cannot receive the feedback signal from the outdoor units for 2 minutes, the AC will stop and display the failure.
  • Page 28   If the outdoor ambient is higher than setting frequency during the oil return, the AC quit oil 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 ℃...

  • Page 29: 10. Troubleshooting

      10. Troubleshooting Indoor unit error code explanation: 10.1 FSFMIF-90AE2 FSFIF-121AE2 FSFMIF-180AE2 Operation Lamp Malfunction Timer Lamp (flashes) Indoor EEPROM malfunction Communication malfunction between indoor and outdoor units Indoor fan speed has been out of control Open or short circuit of T1 temperature sensor Open or short circuit of T2 temperature sensor Overcurrent protection (For some units) Open or short circuit of T4 temperature sensor...
  • Page 30   FSLMI-180AE2 DISPLAY MALFUNCTION Timer Alarm DIGITAL TUBE Open or short circuit of T1 temperature sensor ☆ Open or short circuit of T2 temperature sensor ☆ Indoor / outdoor units communication error ☆ Full-water malfunction ☆ Indoor EEPROM malfunction ☆ ☆...
  • Page 31   Error rotor position protection of compressor ☆ Mode conflict ☆ Low pressure protection of compressor ☆ X(off) ☆(flash at 2Hz) O (on) Outdoor unit error code explanation: 10.2 Display LED STATUS Outdoor EEPROM malfunction Indoor / outdoor units communication error Communication malfunction between IPM board and outdoor main board Open or short circuit of outdoor unit temperature sensor Voltage protection...
  • Page 32   Trouble shooting 10.3 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   Pic 1: check the voltage of N to S (Vs), is it moving alternately between positive value and negative value? Pic 2:IPM or outdoor main PCB Operating Self-Check Pic 2: IPM or outdoor main PCB Power, Self-Check Operating  ...
  • 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   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.
  • Page 37   For console: DC motor voltage input and output For split type: Color Signal Voltage Vs/Vm 280V~380V Black White 14-17.5V Yellow 0~5.6V Blue 14-17.5V For other types: Color Signal Voltage Vs/Vm 192V~380V Black White 13.5-16.5V Yellow 0~6.5V Blue 13.5-16.5V  ...
  • Page 38   9.3.1.4 Open or short circuit of temperature sensor. Check the connections  between temperature  Correct the connections. sensor and PCB. Are the  connections good? Measure the resistance value  of the sensor via Appendix 1 Is it normal? Replace the sensor. Replace the indoor PCB  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  ...
  • 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   9.3.3.3 Voltage protection(ODU E5) Voltage protection Check the voltage of outdoor unit power supply, whether the voltage Check the power supply between L(L1) and N (L2) is about 220~240VAC Check whether the voltage of IPM board P and N is normal? DC277-356V for 18-27KBtu/h;...
  • Page 43   9.3.3.4 Outdoor unit fan speed has been out of control (E8) Index 1: 1. Outdoor 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.
  • Page 44   9.3.3.5 High pressure protection (ODU P1)(For FS4MIF-281AE2 FS4MIF-361AE2 FS5MIF-421AE0)  ...
  • Page 45   9.3.3.6 Low pressure protection (ODU P2)(For FS4MIF-281AE2 FS4MIF-361AE2 FS5MIF-421AE0) Low pressure protection Whether the wiring between the low pressure protector and main control Connect it well board is connected well or correctly Whether the low pressure protector is broken Method: Disconnect the plug. Measure the resistance of the low pressure protector.
  • Page 46   9.3.3.7 Current protection of compressor (ODU P3)  ...
  • Page 47   9.3.3.8 Temperature protection of compressor discharge (ODU P4) Temperature protection of  compressor discharge Check whether the  Check whether the  compressor discharge temp. is  Stop leaking and add refrigerant refrigerant is leak more than 115°C ? Check whether connection is right between compressor discharge temp. Correct the wiring connection sensor and PCB according to wiring diagrams? Measure the resistance value compressor discharge temp.
  • Page 48   9.3.3.9 High temperature protection of condenser (ODU P5) When outdoor pipe temperature is more than 65°C, the unit will stop, and unit runs again when outdoor pipe temperature less than 52°C. Check the connection  between temperature  Correct the connection High temperature protection of  sensor and PCB. condenser Check whether the condenser temperature is Check whether the Higher than 65°C...
  • Page 49   9.3.3.10 IPM module protection (ODU P6) IPM module protection Check whether the voltage range  Check whether the input  Regulate it to correct, then  of P‐N on IPM module is normal?  power supply is correct?  check whether the system  DC277‐356V for 18‐28KBtu/h;  208‐230V, 1N, 60Hz can work normally? DC277‐410V for 36‐42KBtu/h Check whether the connecting  line between main board and  Connect it tightly,  Check whether the  the IPM module is connected  check ok or not? Connect it correctly  power supply line is  tightly and tightly, check ok  connected correctly and  or not? tightly Check whether the connecting  Connect it well, check  line of the compressor is  ok or not? Check whether the lines  connected correctly or tightly Connect it tightly,  in E‐part box are  check ok or not? connected tightly Replace the IPM module, ...
  • Page 50   10.4 Main parts check Spec. Indoor unit 7K/9K/12K 7K/9K/12K Duct Model FSKMI-181AE2-EU FSLMI-180AE2 Cassette Indoor fan ZKFN-55-8-1 YKSS-68-4-15-1 YKT-27-4-6 motor ZKFP-46-8-1 9K/12K 7K/9K/12K/18K Model Wall mounted Wall mounted Wall mounted Console Indoor fan ZKFP-30-8-3 ZKFP-58-8-1 motor ZKFP-20-8-2 ZKFP-20-8-6 Outdoor unit Model 1x2(14k) 1x2(18k)
  • Page 51   1. Temperature sensor checking Disconnect the temperature sensor from PCB, 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   Appendix 1 Temperature Sensor Resistance Value Table for T1,T2,T3,T4,T2B ( ℃ --K) ℃ ℃ ℃ ℃ K Ohm  K Ohm K Ohm K Ohm  115.266 12.6431 2.35774 0.62973 108.146 12.0561 2.27249 0.61148 101.517 11.5000 2.19073 0.59386 96.3423 10.9731 2.11241 0.57683 89.5865 10.4736 2.03732 0.56038 84.2190 10.000...
  • Page 53   Appendix 2 Temperature Sensor Resistance Value Table for T5 ( ℃ --K) ℃ K Ohm  ℃ K Ohm  ℃ K Ohm  ℃ K Ohm  542.7 68.66 13.59 3.702 511.9 65.62 13.11 3.595 62.73 12.65 3.492 455.9 59.98 12.21 3.392 430.5 57.37 11.79 3.296 406.7 54.89 11.38...
  • Page 54   2.Compressor checking Measure the resistance value of each winding by using the tester. Position Resistance Value ASN108D22UEZ ASM135D23UFZ ATF235D22UMT ATF310D43UMT Blue - 1.57Ω(20℃) 1.75Ω(20℃) 0.75Ω(20℃) 0.65Ω(20℃)  ...
  • Page 55   3. IPM continuity check Turn off the power, let the large capacity electrolytic 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 Digital tester Normal resistance value (+)Red...

This manual is also suitable for:

Fs2mif-181ae2Fs3mif-211ae2Fs3mif-271ae2Fs4mif-281ae2Fs4mif-361ae2Fs5mif-421ae0

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