Fisher FSAI-SU-91AE2 Service Manual
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Fisher FSAI-SU-91AE2 Service Manual

Room air conditioner split wall-mounted type
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SERVICE MANUAL
Room Air Conditioner
Split Wall-Mounted Type
FSAI-SU-91AE2 / FSOAI-SU-91AE2
FSAI-SU-121AE2 / FSOAI-SU-121AE2
FSAIF-SU-181AE2 / FSOAIF-SU-181AE2
FSAIF-SU-241AE2 / FSOAIF-SU-241AE2
NOTE:
Before servicing the unit, please read this at first.
Always contact with your service center if meet problem.
FI_SM_FSAI-SU-91-121-181-241AE2_160806

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Summary of Contents for Fisher FSAI-SU-91AE2

  • Page 1 SERVICE MANUAL Room Air Conditioner Split Wall-Mounted Type FSAI-SU-91AE2 / FSOAI-SU-91AE2 FSAI-SU-121AE2 / FSOAI-SU-121AE2 FSAIF-SU-181AE2 / FSOAIF-SU-181AE2 FSAIF-SU-241AE2 / FSOAIF-SU-241AE2 NOTE: Before servicing the unit, please read this at first. Always contact with your service center if meet problem. FI_SM_FSAI-SU-91-121-181-241AE2_160806...

  • Page 2: Table Of Contents

    CONTENTS 1. Precaution ..............................3 1.1 Safety Precaution .......................... 3 1.2 Warning ............................3 2. Function ................................ 6 3. Dimension ..............................7 3.1 Indoor Unit ............................. 7 3.2 Outdoor Unit ..........................11 4 .Refrigerant Cycle Diagram ........................15 5 .Installation Details ............................. 18 5.1 Wrench torque sheet for installation ...................

  • Page 3: Precaution

    Sharp edges could cause injury, be especially careful of the case edges and the fins on the 1. Precaution condenser and evaporator.  For installation, always contact the 1.1 Safety Precaution dealer or an authorized service center.   To prevent injury to the user or other Do not install the product on a people and property damage, the following defective installation stand.
  • Page 4 disconnect the power supply cable. A bad connection may cause water leakage.  There is risk of electric shock or fire. Keep level even when installing the  Stop operation and close the window product. in storm or hurricane. If possible, remove It can avoid vibration of water leakage.
  • Page 5 is operated.  Do not drink the water drained from the product.  Use a firm stool or ladder when cleaning or maintaining the product. 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 new batteries or different types of batteries.

  • Page 6: Function

    2. Function Model Names of Indoor/Outdoor Units Capacity Indoor units Outdoor units FSAI-SU-91AE2 FSOAI-SU-91AE2 FSAI-SU-121AE2 FSOAI-SU-121AE2 FSAIF-SU-181AE2 FSOAIF-SU-181AE2 FSAIF-SU-241AE2 FSOAIF-SU-241AE2...

  • Page 7: Dimension

    3. Dimension 3.1 Indoor Unit Model FSAI-SU-91AE2 FSAI-SU-121AE2 FSAIF-SU-181AE2 FSAIF-SU-241AE2 1040...
  • Page 9 FSAI-SU-91AE2 FSAI-SU-121AE2 FSAIF-SU-181AE2...
  • Page 10 FSAIF-SU-241AE2...

  • Page 11: Outdoor Unit

    3.2 Outdoor Unit...
  • Page 12 FSOAI-SU-91AE2, FSOAI-SU-121AE2 779 W3 487 W1 300 D 770 W 70 W2 25 B1 61.5 A2 12 A1...
  • Page 13 FSOAIF-SU-181AE2 815 W3 514 W1 333 D 800 W 70 W2 62 B1 D2 D3 20 A1 61.6 A2...
  • Page 14 FSOAIF-SU-241AE2...

  • Page 15: Refrigerant Cycle Diagram

    LIQUID SIDE (Heating Model only) 2-WAY VALVE CAPILIARY TUBE HEAT HEAT EXCHANGE EXCHANGE (EVAPORATOR) (CONDENSER) T1 Room temp. sensor T2 Evaporator temp. sensor GAS SIDE 4-WAY VALVE 3-WAY VALVE ACCUMULATOR COOLING COMPRESSOR HEATING FSAI-SU-91AE2 FSOAI-SU-91AE2 FSAI-SU-121AE2 FSOAI-SU-121AE2 FSAIF-SU-181AE2 FSOAIF-SU-181AE2 FSAIF-SU-241AE2 FSOAIF-SU-241AE2...
  • Page 16 FSAI-SU-121AE2 FSAIF-SU-181AE2 FSAIF-SU-241AE2 FSAI-SU-91AE2 FSOAI-SU-91AE2 FSOAI-SU-121AE2...
  • Page 17 FSOAIF-SU-241AE2 FSOAIF-SU-181AE2...

  • Page 18: Installation Details

    5 .Installation Details 5.1 Wrench torque sheet for installation Outside diameter Torque Additional tightening torque inch N.cm N.cm Ф6.35 1500(153kgf.cm) 1600(163kgf.cm) Ф9.52 2500(255kgf.cm) 2600(265kgf.cm) Ф12.7 3500(357kgf.cm) 3600(367kgf.cm) Ф15.9 4500(459kgf.cm) 4700(479kgf.cm) Ф19 6500(663kgf.cm) 6700(683kgf.cm) 5.2 Connecting the cables The power cord of connect should be selected according to the following specifications sheet. Model Nominal cross-sectional area (mm²...

  • Page 19: Pipe Length And The Elevation

    Standard Max. Max. Additional Pipe size Model length Elevation Length refrigerant Liquid B (m) A (m) (g/m) 3/8’’ 1/4’’ FSAI-SU-91AE2 /FSOAI-SU-91AE2 (Ф6.35) (Ф9.52) 3/8’’ 1/4’’ FSAI-SU-121AE2 /FSOAI-SU-121AE2 (Ф6.35) (Ф9.52) 1/4’’ 1/2’’ FSAIF-SU-181AE2 /FSOAIF-SU-181AE2 (Ф12.7) (Ф6.35) 3/8’’ 5/8’’ FSAIF-SU-241AE2 /FSOAIF-SU-241AE2 (Ф15.9) (Ф9.52)

  • Page 20: Installation For The First Time

    connection to the vacuum pump. 5.4 Installation for the first time 4) Fully open the handle Lo of the manifold Air and moisture in the refrigerant system have valve. undesirable effects as below: 5) Operate the vacuum pump to evacuate. ●...

  • Page 21: Adding The Refrigerant After Running The System For Many Years

    3). Air purging. up to ensure the liquid charge. Open the valves on the charging cylinder and the 2). Purge the air from the charge hose. charge set. Purge the air by loosening the flare Open the valve at the bottom of the cylinder nut on the 2-way valve approximately 45’...

  • Page 22: Re-Installation While The Indoor Unit Need To Be Repaired

    purge the air (be careful of the liquid Open the handle Lo valve of the manifold valve refrigerant). slightly to purge air from the charge hose for 5 3) Put the charging cylinder onto the electronic seconds and then close it quickly. scale and record the weight.

  • Page 23: Re-Installation While The Outdoor Unit Need To Be Repaired

    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 valves to the open position Be sure to use a hexagonal wrench to operate the valve stems.
  • Page 24 cap to a torque of 18N.m. Be sure to check for gas leakage.

  • Page 25: Operation Characteristics

    6. Operation Characteristics Mode Cooling operation Heating operation Drying operation Temperature Room temperature 17℃~32℃ 0℃~30℃ 10℃~32℃ (62℉~90℉) (32℉~86℉) (50℉~90℉) Outdoor temperature -15℃~30℃ 0℃~50℃ (5℉~86℉) (32℉~122℉) -15℃~50℃ (5℉~122℉) CAUTION: 1. If the air conditioner is used beyond the above conditions, certain safety protection features may come into operation and cause the unit to operate abnormally.

  • Page 26: Electronic Function

    OFF,Fresh, Swing, Turbo or Silence feature is 7. Electronic function cancelled. 7.1 Abbreviation Dispalys ‘ ’ under deforsting operation. T1: Indoor room temperature Dispalys ‘ ’ when anti-cold air feature is T2: Coil temperature of evaporator activated under heating mode. T3: Coil temperature of condenser Dispalys ‘...

  • Page 27: Main Protection

    7.3 Main Protection malfunction , the air conditioner will keep working but show the error code, in case of any 7.3.1 Three minutes delay at restart for emergency use. compressor When there’s more than one temperature Less than 1 minute delay for the 1 time sensor in malfunction, the air conditioner will start-up and 3 minutes delay for others.

  • Page 28: Operation Modes And Functions

    7.4 Operation Modes and Functions 7.4.1 Fan mode ( 1) Outdoor fan and 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.
  • Page 29 Decrease Hold Increase Resume 7.4.3.3 Indoor fan running rules When condenser temperature temp. is more When the compressor is on, the indoor fan can than setting value, the compressor will stop. be set to high/med/low/auto/mute. When indoor unit coil temp. is low, the anti-cold 7.4.2.5 Evaporator temperature protection air function will start and indoor fan motor will When Evaporator temperature temp.is less...
  • Page 30 7.4.4 Auto-mode T1-Td+ΔT This mode can be chosen with remote controller and the setting temperature can be changed between 17° C~30° C In auto mode, the machine will choose cooling, heating or fan-only mode according to ΔT (ΔT =T1-Ts). T1-Ts Cooling Fan only 7.4.3.4Defrosting mode...
  • Page 31 normal auto mode with 24℃ setting 7.4.9 Refrigerant Leakage Detection temperature. With this new technology, the display area will show “EC” when the outdoor unit detects When AC receives signals, such as switch on, switch off, timer on, timer off, mode setting, fan refrigerant leakage.
  • Page 32 When the unit is running with follow me 7.4.13 Silence operation (optional) function, if the PCB doesn’t receive any signal Press the “silence” button on remote controller from remote controller for 7 minutes or pressing to initiate SILENCE function. When the Silence FOLLOW ME button again, the follow me function is activated, the compressor running function will be turned off automatically, and the...
  • Page 33 Reserve Reserve Reserve Reserve Reserve Reserve Reserve Reserve Reserve When the AC enter into the information enquiry status, it will display the code value in the next 25s details are as follows. Enquiry Display value Meaning Remark information T1,T2,T3,T4, -1F,-1E,-1d,-1c,- -25,-24,-23,-22,-21,-2 1.

  • Page 34: Troubleshooting

    stop. consult with engineer Reserve 0-FF Reserve 2~28 Reserve 5~20 Reserve 5~25 8. Troubleshooting Safety Electricity power is still kept in capacitors even the power supply is shut off. Do not forget to discharge the electricity power in capacitor. Electrolytic Capacitors (HIGH VOLTAGE! CAUTION!) For other models, please connect discharge resistance (approx.100Ω...
  • Page 35 Note: The picture above is only for reference. The plug of your side may be different.

  • Page 36: Indoor Unit Error Display

    8.1 Indoor Unit Error Display Operation Timer lamp Display LED STATUS lamp ☆ 1 time Indoor unit EEPROM parameter error ☆ 2 times Indoor / outdoor units communication error ☆ 4 times Indoor fan speed has been out of control Indoor room temperature sensor T1 open circuit or short ☆...

  • Page 37: Trouble Shooting

    8.2 Trouble shooting 8.2.1 EEPROM parameter error diagnosis and solution(E0/F4) E0/F4 Error Code Malfunction decision Indoor or outdoor PCB main chip does not receive feedback conditions from EEPROM chip. Supposed causes Installation mistake ● PCB faulty ● Trouble shooting: Power off, then restart the unit 2 minutes later.
  • Page 38 8.2.2 Indoor / outdoor unit’s communication diagnosis and solution (E1) Error Code Malfunction decision Indoor unit does not receive the feedback from outdoor unit during conditions seconds and this condition happens four times continuously. Supposed causes Wiring mistake ● Indoor or outdoor PCB faulty ●...
  • Page 39 Remark: Use a multi meter to test the resistance of the reactor which does not connect with capacitor. The normal value should be around zero ohm. Otherwise, the reactor must have malfunction and need to be replaced.
  • Page 40 8.2.3 Fan speed has been out of control diagnosis and solution(E3) E3/F5 Error Code Malfunction decision When indoor fan speed keeps too low (300RPM) for certain time, conditions the unit will stop and the LED will display the failure. Supposed causes Wiring mistake ●...
  • Page 41 Index1: 1:Indoor or Outdoor DC Fan Motor(control chip is in 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 has problems and need to be replaced.
  • Page 42 8.2.4 Refrigerant Leakage Detection diagnosis and solution(EC) Error Code Malfunction decision Define the evaporator coil temp.T2 of the compressor just starts conditions running as Tcool. In the beginning 8 minutes after the compressor starts up, if T2 ＜Tcool－2℃ does not keep continuous 4 seconds and compressor running frequency higher than 50Hz does not keep continuous 3 minutes, and this situation happens 3 times, the display area will show “EC”...
  • Page 43 8.2.5 Open circuit or short circuit of temperature sensor diagnosis and solution (E5) E4/E5/F1/F2/F3 Error Code Malfunction decision If the sampling voltage is lower than 0.06V or higher than 4.94V, conditions the LED will display the failure. Supposed causes Wiring mistake ●...
  • Page 44 8.2.6 Overload current protection diagnosis and solution(F0) Error Code Malfunction decision An abnormal current rise is detected by checking the specified conditions current detection circuit. Supposed causes Power supply problems. ● System blockage ● PCB faulty ● Wiring mistake ● Compressor malfunction ●...
  • Page 45 8.2.7 IPM malfunction or IGBT over-strong current protection diagnosis and solution (P0) Error Code Malfunction decision When the voltage signal that IPM send to compressor drive chip is abnormal, the display LED will show “P0” and AC will turn off. conditions Supposed causes Wiring mistake...
  • Page 46  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...
  • Page 47 8.2.8 Over voltage or too low voltage protection diagnosis and solution (P1) Error Code Malfunction decision An abnormal voltage rise or drop is detected by checking the conditions specified voltage detection circuit. Supposed causes Power supply problems. ● System leakage or block ●...
  • Page 48 8.2.9 High temperature protection of IPM or compress top diagnosis and solution (P2) Error Code Malfunction decision If the sampling voltage is not 5V, the LED will display the failure. conditions Supposed causes Power supply problems. ● System leakage or block ●...
  • Page 49 High temperature protection of compressor top: Check the air flow system Clear up the air inlet and outlet or the heat of indoor and outdoor units exchanger of indoor and outdoor units. Power off, then restart the unit 10 minutes later Check if the temperature Check the overload Correct the connection.
  • Page 50 8.2.10 Inverter compressor drive error diagnosis and solution (P4) Error Code Malfunction decision An abnormal inverter compressor drive is detected by a special conditions detection circuit, including communication signal detection, voltage detection, compressor rotation speed signal detection and so on. Supposed causes Wiring mistake ●...
  • Page 51 Main parts check 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 (° C--K) ° C ° F K Ohm ° C ° F K Ohm ° C ° F K Ohm ° C ° F K Ohm 115.266 12.6431 2.35774 0.62973 108.146 12.0561 2.27249 0.61148...
  • Page 53 Appendix 2 Temperature Sensor Resistance Value Table for T5 (° C --K) ° C ° F K Ohm ° C ° F K Ohm ° C ° F K Ohm ° C ° F K Ohm 542.7 68.66 13.59 3.702 511.9 65.62 13.11...
  • Page 54 2.Compressor checking Measure the resistance value of each winding by using the tester. Position Resistance Value ASK89D53UEZ ASM135D23UFZ ATF235D22UMT Blue - Red 2.35Ω 1.75Ω 0.75Ω Blue - Black (20℃/68℉) (20℃/68℉) (20℃/68℉) Red - Blue...

This manual is also suitable for:

Fsoai-su-91ae2Fsai-su-121ae2Fsoai-su-121ae2Fsaif-su-181ae2Fsoaif-su-181ae2Fsaif-su-241ae2 ... Show all

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