DuctlessAire FSAIF-Pro-96AE3 Service Manual
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DuctlessAire FSAIF-Pro-96AE3 Service Manual

Split wall-mounted type
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SERVICE MANUAL
Room Air Conditioner
Split Wall-Mounted Type
FSAIF-Pro-96AE3 / FSOAIF-Pro-96AE2
(FSAIF-Pro-95AE2/2018 / FSOAIF-Pro-95AE2/2018)
FSAIF-Pro-126AE3 / FSOAIF-Pro-126AE2
(FSAIF-Pro-125AE2/2018 / FSOAIF-Pro-125AE2/2018)
FSAIF-Pro-186AE3 / FSOAIF-Pro-186AE2
(FSAIF-Pro-185AE2/2018 / FSOAIF-Pro-185AE2/2018)
FSAIF-Pro-246AE3 / FSOAIF-Pro-246AE2
NOTE:
Before servicing the unit, please read this at first.
Always contact with your service center if meet problem.
AE3 / AE2_20180917
FI_SM_FSAIF-Pro-..5/2018_...6

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Summary of Contents for DuctlessAire FSAIF-Pro-96AE3

  • Page 1 SERVICE MANUAL Room Air Conditioner Split Wall-Mounted Type FSAIF-Pro-96AE3 / FSOAIF-Pro-96AE2 (FSAIF-Pro-95AE2/2018 / FSOAIF-Pro-95AE2/2018) FSAIF-Pro-126AE3 / FSOAIF-Pro-126AE2 (FSAIF-Pro-125AE2/2018 / FSOAIF-Pro-125AE2/2018) FSAIF-Pro-186AE3 / FSOAIF-Pro-186AE2 (FSAIF-Pro-185AE2/2018 / FSOAIF-Pro-185AE2/2018) FSAIF-Pro-246AE3 / FSOAIF-Pro-246AE2 NOTE: Before servicing the unit, please read this at first. Always contact with your service center if meet problem.

  • Page 3: Table Of Contents

    Table of Contents Page 1. Safety Precautions ..................1 In case of Accidents or Emergency Pre-Installation and Installation Operation and Maintenance 2. Specifications ....................3 Model Reference Electrical Wiring Diagrams 3. Product Features ................... 9 Operation Modes and Functions 4. Maintenance and Disassembly ..............17 Maintenance Disassembly 5.

  • Page 5: Safety Precautions

    Safety Precautions Contents In Case of Accidents or Emergency ..............2 Pre-Installation .......................2 Operation and Maintenance .................2...

  • Page 6: In Case Of Accidents Or Emergency

    To prevent personal injury, or property or unit damage, CAUTION adhere to all precautionary measures and instructions • • While unpacking be careful of sharp edges around outlined in this manual. Before servicing a unit, refer to this the unit as well as the edges of the fins on the con- service manual and its relevant sections.

  • Page 7: Specifications

    Specifications Contents Model Reference ....................4 Electrical Wiring Diagrams ..................5 Indoor Unit ....................5 Outdoor Unit ....................7...

  • Page 8: Model Reference

    1. Model Reference Refer to the following table to determine the specific indoor and outdoor unit model number of your purchased equipment. Indoor Unit Model Outdoor Unit Model Capacity (Btu) Power Supply FSAIF-Pro-96AE3 FSOAIF-Pro-96AE2 FSAIF-Pro-126AE3 FSOAIF-Pro-126AE2 220-240V~, 50Hz, 1Phase FSAIF-Pro-186AE3...

  • Page 9: Electrical Wiring Diagrams

    2. Electrical Wiring Diagrams Indoor unit Abbreviation Paraphrase Yellow-Green Conductor Positive and Negative Ion Generator Capacitor PLASMA Electronic Dust Collector LIVE NEUTRAL Heater The Electric Heating Belt of Indoor Unit Indoor Room Temperature Coil Temperature of Indoor Heat Exchanger  Page 5 ...
  • Page 10 FSOAIF-Pro-96AE2 FSOAIF-Pro-126AE2 FSOAIF-Pro-186AE2 FSOAIF-Pro-246AE2 91454 2020328 O PTI O N AL INDOOR WIRING DIAGRAM Y/ G I O N CN12_1 CN12_2 H EATER CN6_1 CN6_2 OPTIONAL OPTIONAL Applicable for MULTI and MONO unit without 1W standby control feature Applicalbe for MONO unit with 1W standby control feature ...

  • Page 11: Outdoor Unit

    Outdoor Unit Abbreviation Paraphrase 4-WAY Gas Valve Assembly/4-WAY VALVE AC-FAN Alternating Current FAN DC-FAN Direct Current FAN AC Current Detector COMP Compressor Coil Temperature of Condenser Outdoor Ambient Temperature Compressor Suction Temperature Compressor Discharge Temperature Electirc Expansive Valve L-PRO Low Pressure Switch H-PRO High Pressure Switch FSAIF-Pro-246AE3...
  • Page 12 FSAIF-Pro-126AE3 FSAIF-Pro-96AE3 FSAIF-Pro-186AE3 BLUE OR BLACK BROWN 2(N) 1(L) I N D O O R U N I T 4-WAY CRANKCASE HEATER HEATER BLUE BLACK CN 7 OPTIONAL: DC-FAN  Page 8 ...

  • Page 13: Product Features

    Product Features Contents Operation Modes and Functions ................10 Abbreviation ....................10 Safety Features ....................10 Display Function ..................10 Fan Mode ....................11 Cooling Mode .....................11 Heating Mode (For heat pump models) ............11 Auto-mode ....................12 Drying Mode ....................12 Forced Operation Function ................12 1.10 Timer Function ....................13 1.11 Sleep Function .....................13 1.12 Auto-Restart Function ..................13 1.13 Refrigerant Leakage Detection ..............13...

  • Page 14: Operation Modes And Functions

    1. Operation Modes and Functions • When more than one temperature sensor is malfunctioning, the air conditioner ceases operation. Refrigerant leakage detection Abbreviation This function is active only when mode is selected. It will Unit element abbreviations detect if the compressor is being damaged by refrigerant leakage or by compressor overload.

  • Page 15: Fan Mode

    FSOAIF-Pro-96AE2 FSOAIF-Pro-126AE2 FSOAIF-Pro-186AE2 FSOAIF-Pro-246AE2 Fan Mode 1.5.4 Condenser Temperature Protection When fan mode is activated: • The outdoor fan and compressor are stopped. FSOAIF-Pro-246AE2 • Temperature control is disabled and no temperature • When TP3<T3< TP3+5, the compressor frequency will setting is displayed.

  • Page 16: Auto-Mode

    of T1-TS. • T3 maintained above TCDE2°C for 80 seconds. • Unit runs for 10 minutes consecutively in defrosting 1.6.3 Outdoor Fan Control: mode. • The outdoor unit will be run at different fan speed 1.6.5 Evaporator Temperature Protection according to T4. •...

  • Page 17: Timer Function

    • The unit exits forced operation when it receives the fixed at low speed. Anti-cold wind function takes following signals: priority. • Switch on • The operating time for sleep mode is 7 hours, after which, the unit exits this mode and switches off. •...

  • Page 18: Follow Me(Optional)

    • Self Clean keeps the indoor unit dry and prevents mold growth. 1.17 Follow me(Optional) • If you press “Follow Me” on the remote, the indoor unit will beep. This indicates the follow me function is active. • Once active, the remote control will send a signal every 3 minutes, with no beeps.
  • Page 19 Displayed Displayed code Explanation Meaning Additional Notes value Room temperature 1. All displayed temperatures use actual values. Indoor coil temperature 2. All temperatures are -1F,-1E,-1d,-1c,- -25,-24,-23,-22, displayed in °C regardless Outdoor coil 1b,-1A -21,-20 of remote used. temperature -19—99 -19—99 3.
  • Page 20 Displayed Displayed code Explanation Meaning Additional Notes value Reserved 0-FF  Page 16 ...

  • Page 21: Maintenance And Disassembly

    Maintenance and Disassembly Contents Maintenance ......................18 First Time Installation Check ................18 Refrigerant Recharge ...................20 Re-Installation .....................21 1.3.1 Indoor Unit ..................21 1.3.2 Outdoor Unit ................23 Disassembly ......................25 Indoor Unit ....................25 Outdoor Unit ....................41...

  • Page 22: Maintenance

    1. Maintenance First Time Installation Check To prevent air and moisture from affecting the air Air and moisture trapped in the refrigerant system affects conditioner’s performance, the indoor unit, as well as the the performance of the air conditioner by: pipes between the indoor and outdoor unit, must be be •...
  • Page 23 Procedure: • If the pressure does not achieve -0.1 MPa Tighten the flare nuts of the indoor and outdoor (14.5 Psi) after 50 minutes, check for leakage. units, and confirm that both the 2- and 3-way valves are closed. • If the pressure successfully reaches -0.1 MPa (14.5 Psi), fully close the Handle Lo valve and Connect the charge hose with the push pin of Handle cease vacuum pump operations.

  • Page 24: Refrigerant Recharge

    Refrigerant Recharge Prior to recharging the refrigerant, confirm the additional amount of refrigerant required using the following table: Models Standard length Max. elevation Max. length Additional refrigerant 7k-12k 5m (16.4ft) 10m (32.8ft) 25m (82.0ft) 15g/m (0.16oz/ft) 5m (16.4ft) 20m (65.6ft) 30m (98.4ft) 15g/m (0.16oz/ft) 5m (16.4ft)

  • Page 25: Re-Installation

    Re-Installation 1.3.1 Indoor Unit Collecting the refrigerant into the outdoor unit Procedure: Operate the air conditioner in cooling mode. Cease Confirm that the 2- and 3-way valves are opened. operations when the gauge reaches 0.1 MPa Remove the valve stem caps and ensure that the valve (14.5 Psi).
  • Page 26 Air purging with vacuum pump Procedure: • If the pressure does not achieve -0.1 MPa Tighten the flare nuts of the indoor and outdoor (14.5 Psi) after 50 minutes, check for leakage. units, and confirm that both the 2- and 3-way valves are closed.

  • Page 27: Outdoor Unit

    1.3.2 Outdoor Unit Evacuation for the whole system Procedure: Close the valve (Low side) on the charge set and turn Confirm that the 2- and 3-way valves are opened. off the vacuum pump. Connect the vacuum pump to the 3-way valve’s Wait a period of five minutes then check whether the service port.
  • Page 28 Refrigerant charging Procedure: Connect the charge hose to the 3-way service port Open the valves (Low side) on the charge set and and then open the 2- and the 3-way valves. charge the system with liquid refrigerant. Connect the charge hose to the valve at the bottom When the electronic scale displays the correct weight of the cylinder.

  • Page 29: Disassembly

    2. Disassembly Indoor unit Front Panel Procedure Illustration 1) Hold the front panel by the tabs on Front Panel the both sides and lift it (see CJ_AB_ INV_001). CJ_AB_INV_001 2) Push up the bottom of an air filter (step 1), and then pull it out downwards (step 2) (see CJ_AB_ INV_002).
  • Page 30 Procedure Illustration 3) Open the horizontal louver and push the hook towards left to open it (see CJ_AB_INV_003). Horizontal Louver Hook CJ_AB_INV_003 4) Bend the horizontal louver lightly by both hands to loosen the hooks, then remove the horizontal louver (see CJ_AB_INV_004).
  • Page 31 Procedure Illustration 5) Pry the electrical cover by a screw driver, and rotate it towars left, then remove it. (see CJ_AB_INV_005). CJ_AB_INV_005 6) Disconnect the connector for display board. (see CJ_AB_INV_006) . CJ_AB_INV_006 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 32 Procedure Illustration 7) Slid the front panel side to side to release each axis (see CJ_AB_INV_007) CJ_AB_INV_007 8) Open the screw cap and then remove the 3 screws (see CJ_AB_INV_008). CJ_AB_INV_008 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 33 Procedure Illustration 9) Release the hooks with hands. (see CJ_AB_INV_009) CJ_AB_INV_009 10) Release the 5 hooks in the back (see CJ_AB_INV_010). Hooks CJ_AB_INV_010 11) Pull out the panel frame while pushing the hook through a clearance between the panel frame and the heat exchanger.
  • Page 34 Procedure Illustration 12) Release the 5 hooks of the vertical blades, then pull the vertical blades Hooks rightward and remove it (see CJ_AB_ INV_012). CJ_AB_INV_012 13) Remove 1 screw of the display board. (see CJ_AB_INV_013). 14) Rotate the display board in the direction shown in the right picture.
  • Page 35 Electrical parts (Antistatic gloves must be worn.) Note: Remove the front panel (refer to 1. Front panel) before disassembling electrical parts. Procedure Illustration Ground Screws 1) Cut the ribbon by a shear, then pull out the coil temperature sensor (T2) (see CJ_AB_INV_014).
  • Page 36 Procedure Illustration 4) Remove the fixed devices of the connectors (see CJ_AB_INV_016). CJ_AB_INV_016 CJ_AF_INV_011-1 5) Disconnect the connectors of fan motor, the step motor and the T2 sensor (see CJ_AB_INV_017). CJ_AB_INV_017 6) Open the left side plate of electronic control box (see CJ_AB_INV_018). CJ_AB_INV_018 Note: This section is for reference only.
  • Page 37 Procedure Illustration 7) Open the two clips on the front of the electric box. (see CJ_AB_INV_019) CJ_AB_INV_019 8) Open the upper cover plate of electronic control box (see CJ_AB_ INV_020). CJ_AB_INV_020 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 38 Procedure Illustration 9) Remove 1 screw and open the 2 clips along the direction indicated in right image (see CJ_AB_INV_021). CJ_AB_INV_021 Display board 10) Pull out the electrical main board along the direction indicated in right image to remove it (see CJ_AB_ INV_022).
  • Page 39 Evaporator Note: Remove the front panel and electrical parts (refer to 1. Front panel and 2. Electrical parts) before disassembling evaporator. Procedure Illustration 1) Disassemble the pipe holder located at the rear of the unit (see CJ_AB_INV_023). Pipe Holder CJ_AB_INV_023 Screw 2) Remove the 1 screws on the evaporator located at the fixed plate (see CJ_AB_...
  • Page 40 Procedure Illustration 3) Release the hook on the evaporator (see CJ_AB_INV_025). CJ_AB_INV_025 4) Remote the one screw on the evaporator located at the fixed plate (see CJ_AB_ INV_026). CJ_AB_INV_026 5) Pull out the evaporator (see CJ_AB_ INV_027). CJ_AB_INV_027 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 41 Fan motor and fan Note: Remove the front panel, electrical parts and evaporator (refer to 1. Front panel, 2. Electrical parts, and 3. Evaporator). before disassembling fan motor and fan. Procedure Illustration 1) Remove the two screws and remove the fixing board of the fan motor (see CJ_AB_ INV_028).
  • Page 42 Procedure Illustration 3) Remove the fixing screw (see CJ_AB_ INV_030). 4) Pull out the fan motor and fan assembly from the side. Fixing Screw CJ_AB_INV_030 Note: This section is for reference only. Actual unit appearance may vary.  Page 38 ...
  • Page 43 Step motor Note: Remove the front panel and electrical parts (refer to 1. Front panel, 2. Electrical parts) before disassembling step motor. Procedure Illustration 1) Remove the two screws, then remove the stepping motor (see CJ_AB_INV_031). Stepping Motor CJ_AB_INV_031 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 44 Drain Hose Procedure Illustration 1) Rotate the fixed wire clockwise indicated in right image (see CJ_AB_INV_032). CJ_AB_INV_032 2) Pull up the drain hose to remove it (see CJ_AB_INV_033). CJ_AB_INV_033 Note: This section is for reference only. Actual unit appearance may vary. ...

  • Page 45: Outdoor Unit

    Outdoor unit Panel Plate FSOAIF-Pro-96AE2 Procedure Illustration 1) Turn off the air conditioner and the power breaker. 2) Remove the screws of the big handle and then remove the big handle (3 screws) (see CJ_BA30_INV_001). CJ_BA30_INV_001 3) Remove the screws of the top cover and then remove the top cover (3 screws).
  • Page 46 Procedure Illustration 4) Remove the screws of the front panel and then remove the front panel (7 screws) (see CJ_BA30_INV_003). Front Panel CJ_BA30_INV_003 5) Remove the screws of the rear net and then remove the rear net (2 screws) (see CJ_BA30_INV_004). CJ_BA30_INV_004 Note: This section is for reference only.
  • Page 47 Procedure Illustration 6) Remove the screws of the right panel and then remove the right panel (5 screws) (see CJ_BA30_INV_005). Right Panel CJ_BA30_INV_005 Note: This section is for reference only. Actual unit appearance may vary.  Page 43 ...
  • Page 48 FSOAIF-Pro-126AE2 FSOAIF-Pro-186AE2 Procedure Illustration 1) Turn off the air conditioner and the power breaker. 2) Remove the screws of the big handle and then remove the big handle (3 screws) (see CJ_B30_INV_001). Top Cover CJ_B30_INV_001 3) Remove the screws of the top cover and then remove the top cover (3 screws).
  • Page 49 Procedure Illustration 4) Remove the screws of the front panel and then remove the front panel (8 screws) (see CJ_B30_INV_003). Front Panel CJ_B30_INV_003 5) Remove the screws of water collecting cover and then remove the water collecting cover (1 screw) (see CJ_B30_ INV_004).
  • Page 50 Procedure Illustration 6) Remove the screws of the right panel and then remove the right panel (5 screws) (see CJ_B30_INV_005). Right Panel CJ_B30_INV_005 Note: This section is for reference only. Actual unit appearance may vary.  Page 46 ...
  • Page 51 FSOAIF-Pro-246AE2 Procedure Illustration 1) Turn off the air conditioner and the power breaker. 2) Remove the screws of the big handle and then remove the big handle (3 screws) (see CJ_CA30_INV_001). CJ_CA30_INV_001 Top Cover 3) Remove the screws of the top cover and then remove the top cover (3 screws).
  • Page 52 Procedure Illustration 4) Remove the screws of the front panel and then remove the front panel (7 screws) (see CJ_CA30_INV_003). Front Panel CJ_CA30_INV_003 5) Remove the screws of water collecting Water Collecting Cover cover and then remove the water collecting cover (1 screw) (see CJ_ CA30_INV_004).
  • Page 53 Procedure Illustration 6) Remove the screws of the right panel and then remove the right panel (6 screws) (see CJ_CA30_INV_005). Right Panel CJ_CA30_INV_005 Note: This section is for reference only. Actual unit appearance may vary.  Page 49 ...
  • Page 54 Fan disassembly (Antistatic gloves must be worn when you disassemble the electronic box.) Note: Remove the panel plate and (refer to 1. Panel plate) before disassembling fan. FSOAIF-Pro-186AE2 FSOAIF-Pro-96AE2 FSOAIF-Pro-126AE2 Procedure Illustration 1) Remove the nut securing the fan with a spanner (see CJ_ODU_ INV_001 ).
  • Page 55 Procedure Illustration 5) Disconnect the connector for fan motor from the electronic control board (see CJ_ODU_INV_004 ). Fan Motor CJ_ODU_INV_004 6) Remove the fixing screws of the fan motor (4 screws) (see CJ_ODU_INV_005 ). 7) Remove the fan motor. Fan Motor CJ_ODU_INV_005 Note: This section is for reference only.
  • Page 56 FSOAIF-Pro-246AE2 Procedure Illustration 1) Remove the nut securing the fan with a spanner (see CJ_ODU_ INV_006 ). 2) Remove the fan. D-cut CJ_ODU_INV_006 Hook 3) Unfix the hooks and then open the electronic control box cover (4 hooks) (see CJ_ODU_INV_007 ). CJ_ODU_INV_007 Note: This section is for reference only.
  • Page 57 Procedure Illustration 4) Disconnect the connector for fan motor from the electronic control board (see CJ_ODU_INV_008 ). Fan Motor CJ_ODU_INV_008 5) Remove the fixing screws of the fan motor (4 screws) (see CJ_ODU_INV_009 ). 6) Remove the fan motor. Fan Motor CJ_ODU_INV_009 Note: This section is for reference only.
  • Page 58 Electrical parts (Antistatic gloves must be worn.) Note: Remove the panel plate and fan assembly (refer to 1. Panel plate and 2. Fan assembly) before disassembling electrical parts. FSOAIF-Pro-186AE2 FSOAIF-Pro-96AE2 FSOAIF-Pro-126AE2 Procedure Illustration 1) Remove the connector for the compressor (see CJ_ODU_INV_010 ). 2) Pull out the two blue wires connected 4-Way Valve with the four way valve ( CJ_ODU_...
  • Page 59 FSOAIF-Pro-246AE2 Procedure Illustration 4-Way Valve 1) Remove the connector for the compressor (see CJ_ODU_INV_011 ). 2) Pull out the two blue wires connected with the four way valve (see CJ_ODU_ Reactor INV_011 ). 3) Pull out connectors of the condenser coil temp.
  • Page 60 Sound blanket WARNING: Recover refrigerant from the refrigerant circuit before remove the compressor. Note: Remove the panel plate, electrical parts, and fan assembly (refer to 1. Panel plate, 2. Electrical parts, and 3. Fan assembly) before disassembling sound blanket. Procedure Illustration 1) Remove the sound blanket (side and top) (see CJ_ODU_INV_012 ).
  • Page 61 Four-way valve (For heat pump models) WARNING: Recover refrigerant from the refrigerant circuit before remove the four-way valve. Note: Remove the panel plate, electrical parts, and fan assembly (refer to 1. Panel plate, 2. Electrical parts, and 3. Fan assembly) before disassembling four-way valve. Procedure Illustration 1) Heat up the brazed parts and then detach...
  • Page 62 Compressor WARNING: Recover refrigerant from the refrigerant circuit before remove the compressor. Note: Remove the panel plate, electrical parts, and fan assembly (refer to 1. Panel plate, 2. Electrical parts, and 3. Fan assembly) before disassembling compressor. Procedure Illustration 1) Remove the flange nut of terminal cover and remove the terminal cover (see CJ_ ODU_INV_014 ).
  • Page 63 Procedure Illustration 3) Remove the hex nuts and washers securing the compressor, located on the bottom plate (see CJ_ODU_INV_016 ). CJ_ODU_INV_016 Suction Pipe 4) Heat up the brazed parts and then remove the the discharge pipe and the suction pipe (see CJ_ODU_INV_017 ). 5) Lift the compressor from the base pan Discharge Pipe assembly with pliers.

  • Page 64: Troubleshooting

    Troubleshooting Contents Safety Caution .....................62 General Troubleshooting ..................63 Error Diagnosis and Troubleshooting Without Error Code .......64 Remote maintenance ...................64 Field maintenance ..................65 Quick Maintenance by Error Code ..............70 Troubleshooting by Error Code ................71 Common Check Procedures.................71 E0/F4 (EEPROM parameter error) ..............73 E1 (Indoor and outdoor unit communication error) ........74 E2 (Zero crossing detection error diagnosis and solution) ......76 E3/F5 (Fan speed has been out of control diagnosis and solution) ....77...
  • Page 65 Contents 5.10 P1(Over voltage or too low voltage protection diagnosis and solution) ..84 5.11 P2(High temperature protection of IPM module diagnosis and solution) ..85 5.12 P4(Inverter compressor drive error diagnosis and solution) ......86...

  • Page 66: Safety Caution

    1. Safety Caution WARNING Electricity remains in capacitors even when the power supply is off. Ensure the capacitors are fully discharged before troubleshooting. Electrolytic Capacitors For other models, connect discharge resistance (approx.100Ω 40W) or a soldering iron plug between the positive and negative terminals of the electrolytic capacitor.

  • Page 67: General Troubleshooting

    2. General Troubleshooting Error Display (Indoor Unit) When the indoor unit encounters a recognized error, the indicator light will flash in a corresponding series, the timer display may turn on or begin flashing, and an error code will be displayed. These error codes are described in the following table: Display Error Information...

  • Page 68: Error Diagnosis And Troubleshooting Without Error Code

    3. Error Diagnosis and Troubleshooting Without Error Code WARNING Be sure to turn off unit before any maintenance to prevent damage or injury. Remote maintenance SUGGESTION: When troubles occur, please check the following points with customers before field maintenance. Problem Solution Unit will not start Page 66-67...

  • Page 69: Field Maintenance

    Field maintenance Problem Solution Unit will not start Page 68-69 Compressor will not start but fans run Page 68-69 Compressor and condenser (outdoor) fan will not start Page 68-69 Evaporator (indoor) fan will not start Page 68-69 Condenser (Outdoor) fan will not start Page 68-69 Unit runs, but shortly stops Page 68-69...
  • Page 70 1.Remote Maintenance Electrical Circuit Refrigerant Circuit Possible causes of trouble Unit will not start ☆ ☆ ☆ ☆ The power switch is on but fans will not start ☆ ☆ ☆ The temperature on the display board cannot be set ☆...
  • Page 71 Others ☆ ☆ ☆ ☆ ☆ ☆ ☆  Page 67 ...
  • Page 72 Electrical Circuit 2.Field Maintenance Possible causes of trouble Unit will not start ☆ ☆ ☆ ☆ ☆ ☆ Compressor will not start but fans run ☆ ☆ ☆ ☆ ☆ Compressor and condenser (outdoor) fan will not start ☆ ☆ ☆...
  • Page 73 Refrigerant Circuit Others ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆ ☆...

  • Page 74: Quick Maintenance By Error Code

    4. Quick Maintenance by Error Code If you do not have the time to test whether specific parts are faulty, you can directly change the required parts according the error code. You can find the parts to replace by error code in the following table. Error Code Part requiring replacement Indoor PCB...

  • Page 75: Troubleshooting By Error Code

    5. Troubleshooting by Error Code Common Check Procedures 5.1.1 Temperature Sensor Check 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.(Tp) sensor.
  • Page 76 5.1.3 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. Normal resistance Normal resistance Digital tester Digital tester value value...

  • Page 77: E0/F4 (Eeprom Parameter Error)

    E0/F4 (EEPROM parameter error) Description: Indoor or outdoor PCB main chip does not receive feedback from EEPROM chip. Recommended parts to prepare: • Indoor PCB • Outdoor PCB Troubleshooting and repair: Shut off the pow er suppl y and turn i t on 2 m i nutes l ater.

  • Page 78: E1 (Indoor And Outdoor Unit Communication Error)

    E1 (Indoor and outdoor unit communication error) Description: The indoor unit has not received feedback from the outdoor unit for 110 seconds, four consecutive times. Recommended parts to prepare: • Indoor PCB • Outdoor PCB • Reactor Troubleshooting and repair: Pow er off, then restart the uni t after 2 m i nutes.
  • Page 79 Remarks: • Use a multimeter to test the DC voltage between 2 port and 3 port of outdoor unit. The red pin of multimeter connects with 2 port while the black pin is for 3 port. • When AC is normal running, the voltage will move alternately between -25V to 25V. •...

  • Page 80: E2 (Zero Crossing Detection Error Diagnosis And Solution)

    E2 (Zero crossing detection error diagnosis and solution) Description: When PCB does not receive zero crossing signal feedback for 4 minutes or the zero crossing signal time interval is abnormal. Recommended parts to prepare: • Connection mistake • PCB faulty Troubleshooting and repair: C heck the connecti ons and pow er suppl y.

  • Page 81: E3/F5 (Fan Speed Has Been Out Of Control Diagnosis And Solution)

    E3/F5(Fan speed is operating outside of the normal range) Description: When the indoor fan speed keeps too low (300RPM) for certain time, the unit will stop and the LED will display the failure(E3). FSOAIF-Pro-246AE2 , a is 200; for other models, a is 300. When the outdoor fan speed registers below aRPM (for ) or over 1500RPM for an extended period of time, the unit will stop and the LED will display the failure(F5).
  • Page 82 Index: 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 83 3. 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 has problems and need to be replaced.

  • Page 84: E4/E5/F1/F2/F3

    E4/E5/F1/F2/F3 (Open circuit or short circuit of temperature sensor diagnosis and solution) Description: If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED will display the failure. Recommended parts to prepare: • Wiring mistake • Faulty sensor •...

  • Page 85: Ec (Refrigerant Leakage Detection Diagnosis And Solution)

    EC (Refrigerant Leakage Detection diagnosis and solution) Description: Define the evaporator coil temp.T2 of the compressor just starts running as Tcool. In the beginning 8 minutes after the compressor starts up, if T2<Tcool-1°C (Tcool-33.8°F) 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 86: F0(Overload Current Protection Diagnosis And Solution)

    F0(Overload current protection diagnosis and solution) Description: An abnormal current rise is detected by checking the specified current detection circuit. Recommended parts to prepare: • Power supply problems. • System blockage • Faulty PCB • Wiring mistake • Compressor malfunction Troubleshooting and repair: C heck the pow er suppl y.
  • Page 87 P0(IPM malfunction or IGBT over-strong current protection diagnosis and solution) Description: When the voltage signal the IPM sends to the compressor drive chip is abnormal, the display LED shows “P0” and the AC turn off. Recommended parts to prepare: • Wiring mistake •...
  • Page 88 5.10 P1(Over voltage or too low voltage protection diagnosis and solution) Description: Abnormal increases or decreases in voltage are detected by checking the specified voltage detection circuit. Recommended parts to prepare: • Power supply issues • System leakage or blockage •...
  • Page 89 5.11 P2(High temperature protection of IPM module diagnosis and solution) Description: If the temperature of IPM module is higher than setting value, the LED displays this failure code. Recommended parts to prepare: • Faulty PCB • Connection problems Troubleshooting and repair: Check the fastening screws on the PCB and IPM radiator.
  • Page 90 5.12 P4(Inverter compressor drive error diagnosis and solution) Description: An abnormal inverter compressor drive is detected by a special detection circuit, including communication signal detection, voltage detection, compressor rotation speed signal detection and so on. Recommended parts to prepare: • Wiring mistake •...

  • Page 91: Appendix

    Appendix Contents Temperature Sensor Resistance Value Table for T1, T2, T3, and T4 (°C – K) ..88 Temperature Sensor Resistance Value Table for TP (°C --K) ......89 iii) Pressure On Service Port ..................90...
  • Page 92 i) Temperature Sensor Resistance Value Table for T1,T2,T3 and 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 101.517 11.5 2.19073 0.59386 96.3423 10.9731...
  • Page 93 ii) Temperature Sensor Resistance Value Table for TP (°C --K) °C °F K Ohm °C °F K Ohm °C °F K Ohm °C °F K Ohm °C °F K Ohm °C °F K Ohm °C °F K Ohm °C °F K Ohm 542.7 68.66...
  • Page 94 iii) Pressure On Service Port(R410A) Cooling chart: °F(°C) 0(-17) 5(-15) 95 (35) (9.44) (7.22) (23.89) (29.44) (40.56) (46.11) (48.89) 70/59 10.1 10.6 75/63 10.7 11.2 80/67 11.2 11.9 90/73 10.5 10.3 10.0 10.6 12.4 13.0 °F(°C) 0(-17) 5(-15) 95 (35) (9.44) (7.22) (23.89)
  • Page 95 Heating chart: 57/53 47/43 37/33 27/23 17/13 (-8.33/- 0/-2 -17/-18 °F(°C) (13.89/11.67) (8.33/6.11) (2.78/0.56) (-2.78/-5) 10.56) (-17/-19) (-27/-28) 30.3 28.5 25.3 22.8 20.8 18.5 16.5 32.5 30.0 26.6 25.4 23.3 20.5 19.0 33.8 31.5 27.8 26.3 24.9 21.5 20.0 57/53 47/43 37/33 27/23...
  • Page 96 Pressure On Service Port(R32) Cooling chart: °F(°C) 0(-17) 5(-15) 95 (35) (9.44) (7.22) (23.89) (29.44) (40.56) (46.11) (48.89) 70/59 10.3 10.8 75/63 10.9 11.4 80/67 11.4 12.1 90/73 10.7 10.5 10.2 10.8 12.6 13.3 °F(°C) 0(-17) 5(-15) 95 (35) (9.44) (7.22) (23.89) (29.44)
  • Page 97 Heating chart: 57/53 47/43 37/33 27/23 17/13 (-8.33/- 0/-2 -17/-18 °F(°C) (13.89/11.67) (8.33/6.11) (2.78/0.56) (-2.78/-5) 10.56) (-17/-19) (-27/-28) 30.9 29.1 25.8 23.3 21.2 18.9 16.8 33.2 30.6 27.1 25.9 23.8 20.9 19.4 34.5 32.1 28.4 26.8 25.4 21.9 20.4 57/53 47/43 37/33 27/23...

This manual is also suitable for:

Fsoaif-pro-96ae2Fsaif-pro-186ae3Fsoaif-pro-186ae2Fsaif-pro-246ae3Fsoaif-pro-246ae2Fsaif-pro-95ae2/2018 ... Show all

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