Fisher FSAI-Pro-91AE2 Service Manual
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Fisher FSAI-Pro-91AE2 Service Manual

Room air conditioner split wall-mounted type
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FSAI-Pro-91AE2 / FSOAI-Pro-91AE2
FSAI-Pro-121AE2 / FSOAI-Pro-121AE2
FSAIF-Pro-181AE2 / FSOAIF-Pro-181AE2
FSAI-Pro-241AE2 / FSOAI-Pro-241AE2
NOTE:
Before servicing the unit, please read this at first.
Always contact with your service center if meet problem.

SERVICE MANUAL

Room Air Conditioner
Split Wall-Mounted Type
FI_SM_FSAI-Pro-91-121-181-241AE2_141201

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Summary of Contents for Fisher FSAI-Pro-91AE2

  • Page 1: Service Manual

    SERVICE MANUAL Room Air Conditioner Split Wall-Mounted Type FSAI-Pro-91AE2 / FSOAI-Pro-91AE2 FSAI-Pro-121AE2 / FSOAI-Pro-121AE2 FSAIF-Pro-181AE2 / FSOAIF-Pro-181AE2 FSAI-Pro-241AE2 / FSOAI-Pro-241AE2 NOTE: Before servicing the unit, please read this at first. Always contact with your service center if meet problem. FI_SM_FSAI-Pro-91-121-181-241AE2_141201...

  • Page 2: Table Of Contents

    CONTENTS 1. Precaution .............................. 3 1.1 Safety Precaution .......................... 3 1.2 Warning ............................3 2. Function ..............................7 3. Dimension .............................. 8 3.1 Indoor Unit ............................. 8 3.2 Outdoor Unit ..........................10 4. Refrigerant Cycle Diagram ........................11 5. Wiring Diagram .............................12 5.1 Indoor Unit ...........................

  • Page 3: Precaution

    1. Precaution 1.1 Safety Precaution  To prevent injury to the user or other people and property damage, the following instructions must be followed.  Incorrect operation due to ignoring instruction will cause harm or damage.  Before service the unit, be sure to read this service manual at first. 1.2 Warning ...
  • Page 4 condenser and evaporator.  For installation, always contact the dealer or an authorized service center.  Do not install the product on a defective installation stand.  Be sure the installation area does not deteriorate with age. If the base collapses, the air conditioner could fall with it, causing property damage, product failure, and personal injury.
  • Page 5 There is risk of property damage, failure of product, or electric shock.  Do not open the inlet grill of the product during operation. (Do not touch the electrostatic filter, if the unit is so equipped.) There is risk of physical injury, electric shock, or product failure. ...
  • Page 6 could cause product malfunction or inefficient operation.  Operational  Do not expose the skin directly to cool air for long time. (Do not sit in the draft).  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.

  • Page 7: Function

    2. Function Model Names of Indoor/Outdoor Units Capacity Indoor units Outdoor units FSAI-Pro-91AE2 FSOAI-Pro-91AE2 FSAI-Pro-121AE2 FSOAI-Pro-121AE2 Inverter FSAIF-Pro-181AE2 FSOAIF-Pro-181AE2 FSAI-Pro-241AE2 FSOAI-Pro-241AE2 O: optional function...

  • Page 8: Dimension

    3. Dimension 3.1 Indoor Unit Model FSAI-Pro-91AE2 FSAI-Pro-121AE2 FSAIF-Pro-181AE2 FSAI-Pro-241AE2 1045...
  • Page 9 Dimension of installation Model L(mm) R(mm) H(mm) hole(mm) FSAI-Pro-91AE2 ￠65 FSAI-Pro-121AE2 FSAIF-Pro-181AE2 Model L(mm) R(mm) H(mm) Dimension of installation hole(mm) ￠65 FSAI-Pro-241AE2...

  • Page 10: Outdoor Unit

    3.2 Outdoor Unit More than 30cm More than 60cm (Service space) More than 30cm More than 60cm More than 200cm Model FSOAI-Pro-91AE2 FSOAI-Pro-121AE2 FSOAIF-Pro-181AE2 FSOAI-Pro-241AE2...

  • Page 11: Refrigerant Cycle Diagram

    4. Refrigerant Cycle Diagram INDOOR OUTDOOR CHECK VALVE LIQUID SIDE (Heating Model only) 2-WAY VALVE T3 Condenser temp. sensor CAPILIARY TUBE HEAT EXCHANGE HEAT (EVAPORATOR) T4 Ambient T1 Room temp. EXCHANGE temp. sensor sensor (CONDENSER) T2 Evaporator temp. sensor GAS SIDE 4-WAY VALVE 3-WAY VALVE Accumulator...

  • Page 12: Wiring Diagram

    5. Wiring Diagram 5.1 Indoor Unit FSOAI-Pro-91AE2, FSAI-Pro-121AE2, FSAIF-Pro-181AE2...
  • Page 13 FSAI-Pro-241AE2...

  • Page 14: Outdoor Unit

    5.2 Outdoor Unit FSOAI-Pro-91AE2...
  • Page 15 FSOAI-Pro-121AE2, FSOAIF-Pro-181AE2...
  • Page 16 FSOAI-Pro-241AE2...

  • Page 17: Installation Details

    6 Installation Details 6.1 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) 6.2 Connecting the cables The power cord of connect should be selected according to the following specifications sheet. Rated capacity kBTU/h Nominal cross-sectional area (mm²) The cable size and the current of the fuse please chose according to the local rules..

  • Page 18: Pipe Length And The Elevation

    6.3 Pipe length and the elevation The pipe length and refrigerant amount: Pipe size Standard Max. Max. Additional Model length Elevation Length refrigerant B (m) A (m) (g/m) Liquid FSAI-Pro-91AE2 3/8’’ 1/4’’ (Ф9.52) (Ф6.35) FSAI-Pro-121AE2 1/2’’ 1/4’’ FSAIF-Pro-181AE2 (Ф12.7) (Ф6.35) 3/5’’ 3/8’’ FSAI-Pro-241AE2 (Ф15.9) (Ф9.52)

  • Page 19: Installation For The First Time

    6.4 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. ●...
  • Page 20 the meter does not indicate -0.1Mpa after pumping 30 minutes, it should be pumped 20 minutes more. If the pressure can’t achieve -0.1Mpa after pumping 50 minutes, please check if there 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).
  • Page 21 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 valves to the open position.

  • Page 22: Adding The Refrigerant After Running The System For Many Years

    6).When the electronic scale displays the proper weight (refer to the table), disconnect the charge hose from the 3-way valve’s service port immediately and turn off the air conditioner before disconnecting the hose. 7). Mount the valve stem caps and the service port Use torque wrench to tighten the service port cap to a torque of 18N.m.

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

    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 valve’s service port immediately and turn off the air conditioner before disconnecting the hose. 7).
  • Page 24 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 gauge ends up indicating 0.3 to 0.5Mpa. Disconnect the charge set, and tighten the 2-way and 3-way valve’s stem nuts.

  • Page 25: Re-Installation While The Outdoor Unit Need To Be Repaired

    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 valves to the open position Be sure to use a hexagonal wrench to operate the valve stems.
  • Page 26 2. Refrigerant charging 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 27: Operation Characteristics

    7. Operation Characteristics Temperature Cooling operation Heating operation Drying operation Mode 10℃～ 32°C Room temperature 17℃～ 32°C 0°C～ 30℃ Outdoor temperature -15℃～50℃ -15℃～30℃ 0℃～50℃ 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 28: Electronic Function

    8. Electronic function 8.1 Abbreviation T1: Indoor room temperature T2: Coil temperature of evaporator T3: Coil temperature of condenser T4: Outdoor ambient temperature T5: Compressor discharge temperature 8.2 Display function 8.2.1 Icon explanation on indoor display board. Auto indicator: AUTO This indicator illuminates when the air conditioner is in AUTO operation.

  • Page 29: Main Protection

    8.3 Main Protection 8.3.1 Time delay at restart for compressor 1 minute delay for the 1 time start-up and 3 minutes delay for others. 8.3.2 Temperature protection of compressor top The unit will stop working when the compressor top temp. protector cut off, and will restart after the compressor top temp.
  • Page 30 Preheating release condition: If T4＞5℃ or the compressor starts running, the preheating function will stop. 8.3.8 Sensor protection at open circuit and breaking disconnection. When there’s one temperature sensor in malfunction, the air conditioner will display error code and will not stop immediately, to avoid the case that the air conditioner is in urgent need.

  • Page 31: Operation Modes And Functions

    8.4 Operation Modes and Functions 8.4.1 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. (5) Auto fan: T 1 - 2 4 6 .
  • Page 32 8.4.2 Cooling Mode 8.4.2.1 Compressor running rules The maximum operation frequency of compressor after starting submits to following rule. Fmax=T4FREMAX1 Fmax=T4FREMAX2 Fmax=T4FREMAX3 Fmax=T4FREMAX4 Fmax=T4FREMAX5 Fmax=T4FREMAX6 Fmax=T4FREMAX7 Meanwhile, the maximum frequency is limited by the indoor fan speed. Indoor fan speed Maximum frequency High speed / turbo function No limit...
  • Page 33 T1-Ts -1.0 -1.5 While the zones of A,B,C... are corresponding to different compressor running frequency. Note: When T1-Ts keeps in the same temp. zone for 3 minutes, the compressor will run as the below rules: A:Increase the frequency to 3 grade higher until to FREMAX. B~E: Increase the frequency to 2 grade higher until to FREMAX.
  • Page 34 8.4.2.2 Outdoor fan running rules Cooling While A,B,C…means different fan speed of outdoor unit. 8.4.2.3 Indoor fan running rules In cooling mode, indoor fan runs all the time and the speed can be selected as high, medium, low, auto and silent. When the compressor is running, the indoor fan is controlled as below:...
  • Page 35 The auto fan acts as below rules: T1-Ts (H -L)*0.75+L (H -L)*0.5+L (H -L)*0.25+L 8.4.2.4 Condenser temperature protection ---55℃<T3<60℃, the compressor frequency will decrease to the lower level until to F1 and then runs at F1.If T3<54℃, the compressor will keep running at the current frequency. ---T3<52℃, the compressor will not limit the frequency and resume to the former frequency.
  • Page 36 8.4.3 Heating Mode 8.4.3.1 Compressor running rules The maximum operation frequency of the compressor after starting submits to the following rule. Fmax=T4FREHEATMAX1 Fmax=T4FREHEATMAX2 Fmax=T4FREHEATMAX3 Fmax=T4FREHEATMAX4 Fmax=T4FREHEATMAX5 Fmax=T4FREHEATMAX6 Fmax=T4FREHEATMAX7 Fmax=T4FREHEATMAX8 Fmax=T4FREHEATMAX9 Fmax=F21 Fmax=F22 Fmax=F23 Fmax=F24 Fmax=F25...
  • Page 37 Meanwhile, the maximum frequency is limited by the indoor fan speed. Indoor fan speed Maximum frequency High speed/8 degree heating/ turbo function No limit Medium speed FHeatMaxMidFan Low speed/sleep mode FHeatMaxLowFan Silent mode Fixed at F3 If users switch on AC by remote controller, the compressor will run at the Fmax frequency for 7 minutes according to outdoor ambient temp.
  • Page 38 Meanwhile, the compressor running frequency is limited by the current. HeatT4Zone4I HeatT4Zone3I HeatT4Zone2I HeatT4Zone1I 8.4.3.2 Outdoor fan running rules Heating 8.4.3.3 Indoor fan running rules In heating mode, indoor fan can be selected as high, medium, low, auto and silent. The anti-cold- wind function is preferential.
  • Page 39 If the compressor stops caused by the room temperature rising, the indoor fan will be forced to run 127 seconds with breeze. During this period, the anti-cold-wind is disabled. Auto fan action in heating mode: T1-Ts+¦ ¤ T -1.0 (H+-L)*0.2+L -2.0 (H+-L)*0.4+L -3.0...
  • Page 40 8.4.3.4 Defrosting mode Condition of defrosting: If any one of the following items is satisfied, AC will enter the defrosting mode. After the compressor starts up and keeps running, mark the minimum value of T3 from the 10th minutes to 15th minutes as T30. 1)If the compressor cumulate running time is up to 29 minutes and T3<...
  • Page 41 Defrosting action： For 9k,12kmodels: Compressor 4-way valve Outdoor fan no longer than 10m xx=20. For 18k,24k models: Compressor 4-way valve Outdoor fan no longer than 10m xx=20...
  • Page 42 8.4.3.5 Evaporator coil temperature protection TEstop Decrease TEdown Hold TEnorm Resume Off: Compressor stops. Decrease: Decrease the running frequency to the lower level. Hold: Keep the current frequency. Resume: No limitation for frequency. 8.4.4 Auto-mode This mode can be chosen with remote controller and the setting temperature can be changed between 17~30℃.
  • Page 43 8.4.5.2 Compressor running rules T1-Ts 8.4.5.3 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-freezing protection, condenser high temperature protection and outdoor unit frequency limit are active and the same as that in cooling mode.
  • Page 44 8.4.7.3 Timer off. The machine will turn off automatically when reaching the setting time. 8.4.7.4 Timer on/off. The machine will turn on automatically when reaching the setting “on” time, and then turn off automatically when reaching the setting “off” time. 8.4.7.5 Timer off/on.
  • Page 45 unoccupied for a long time in severe cold weather. 8.4.11 Frequency limitation protection Normal VOLT_RST1_ADD VOLT_LIM1_ADD VOLT_LIM_FREQ1_ADD VOLT_RST2_ADD VOLT_LIM2_ADD VOLT_LIM_FREQ2_ADD The PCB will detect the voltage of power supply and adjust the compressor running frequency to protect the system. In the first 10 seconds after power on, this protection is inactive. When this protection happens, it will last 3 minutes and then the PCB will detect the power supply voltage again.
  • Page 46 8.4.12 Compatible with new controller RG52I (optional) Through RG52I controller, five function parameters of air conditioners can be adjusted immediately. There is no need to change the chip anymore. 1, Auto restart function Press “ADJUST” button, choose “F1”. Press “MODIFY” button, Press “ADJUST”...
  • Page 47 8.4.13 Point check function Press the “LED DISPLAY” button of remote controller three times(“Swing button” for some remote controllers) and then press “AIR DIRECTION” button three times, the air conditioner will enter the “information enquiry” status. After that, press the “LED DISPLAY” button to enquiry the next one information and press the “AIR DIRECTION”...
  • Page 48 Indoor unit 0-FF For the detailed status 1 meaning, please consult with engineer Outdoor unit 0-FF For the detailed status meaning, please consult with engineer Outdoor unit 0-FF For the detailed protection meaning, please status 1 consult with engineer Outdoor unit 0-FF For the detailed protection...

  • Page 49: Troubleshooting

    9. Troubleshooting 9.1 Indoor Unit Error Display Operation lamp Timer lamp Display LED STATUS ☆ 1 time Indoor unit EEPROM parameter error ☆ 2 times Indoor / outdoor units communication error ☆ 3 times Zero crossing signal detection error(except FSAIF-Pro-181AE2) ☆...

  • Page 50: Diagnosis And Solution

    9.2 Diagnosis and Solution 9.2.1 EEPROM parameter error diagnosis and solution(E0) EEPROM: a read-only memory whose contents can be erased and reprogrammed using a pulsed voltage.
  • Page 51 9.2.2 Indoor unit and outdoor unit communication protection error diagnosis and solution (E1)
  • Page 52 9.2.3 Zero crossing detection error diagnosis and solution(E2) 9.2.4 Fan speed has been out of control diagnosis and solution (E3/F5)
  • Page 53 Index 1: 1. Indoor AC Fan Motor Measure the resistance value of each winding by using the tester. 2.Outdoor or indoor DC Fan Motor (control chip is in fan motor) Measure the resistance value of each winding by using the tester. If any resistance value is zero, the fan motor must have problems and need to be replaced.
  • Page 54 For other motors: Color Orange Grey White Pink Black Signal Color Blue Yellow Signal 1) Release the UVW connector. Measure the resistance of U-V, U-W, V-W. If the resistance is not equal to each other, the fan motor must has problems and need to be replaced. Otherwise, go to step 2.
  • Page 55 DC motor voltage input and output Color Signal Voltage Vs/Vm 280V~380V Black White 14-17.5V Yellow 0~5.6V Blue 14-17.5V...
  • Page 56 9.2.5 Open circuit or short circuit of temperature sensor diagnosis and solution (E4/E5/F1/F2/F3)
  • Page 57 9.2.6 Refrigerant Leakage Detection diagnosis and solution (EC) Shut off the power supply and turn it on 5 seconds later. Is it still displaying the error code? Check if T2 sensor is well Is there cool air blowing fixed. Correct the installation or replace T2 sensor.
  • Page 58 9.2.7 IPM malfunction or IGBT over-strong current protection diagnosis and solution(P0)
  • Page 59 9.2.8 Over voltage or too low voltage protection diagnosis and solution(P1)
  • Page 60 9.2.9 High temperature protection of compressor top diagnosis and solution(P2)
  • Page 61 9.2.10 Inverter compressor drive error diagnosis and solution(P4)
  • Page 62 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!) Connect discharge resistance (approx.100Ω 40W) or soldering iron (plug) between +, - terminals of the electrolytic capacitor on the contrary side of the outdoor PCB.
  • Page 63 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. Table 1: Some frequently-used R-T data for T1,T2,T3 and T4 sensor: Temperature (℃) Resistance Value (KΩ) 26.9...
  • Page 64 Spec. Code 2T0032300888 2T0032400274 2T0032800688 2T0032900557 Model FSAI-Pro-91AE2 FSAI-Pro-121AE2 FSAIF-Pro-181AE2 FSAI-Pro-241AE2 Compressor ASN108D22UEZ ASN108D22UEZ DA130M1C-31FZ DA150S1C-20FZ WZDK30-38G Indoor fan motor RPG20E RPG20E RPG45C (☆) Outdoor fan WZDK36-38G-W WZDK36-38G-W WZDK36-38G-W WZDK50-38G motor (★) (★) (★) (☆) Note: The motor marked “★”means DC fan motor with control chip in the PCB while the one marked “☆” means DC fan...
  • Page 65 2. Compressor checking Measure the resistance value of each winding by using the tester. Position Resistance Value ASN108D22UEZ ASN108D22UEZ DA130M1C-31FZ DA150S1C-20FZ Blue - Red 1.5Ω Blue - 1.5Ω 1.77Ω 0.95Ω (20℃) Black (20℃) (20 ) (20 ) Red - Blue...
  • Page 66 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 (+)Red (-)Black ∞...

This manual is also suitable for:

Fsaif-pro-181ae2Fsoai-pro-91ae2Fsoaif-pro-181ae2Fsai-pro-241ae2 fsoai-pro-241ae2Fsai-pro-121ae2Fsoai-pro-121ae2

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