Roland FAVORITE ON-OFF Series Service Manual
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Roland FAVORITE ON-OFF Series Service Manual

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FAVORITE
ON-OFF Series
Service Manual 2019

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Summary of Contents for Roland FAVORITE ON-OFF Series

  • Page 1 FAVORITE ON-OFF Series Service Manual 2019...
  • Page 2 Table of Contents Page 1. Safety Precau�ons ..................1 In case of Accidents or Emergency Pre-Installa�on and Installa�on Opera�on and Maintenance 2. Specifica�ons ..................... 3 Model Reference Electrical Wiring Diagrams 3. Product Features ..................9 Opera�on Modes and Func�ons 4. Maintenance and Disassembly ..............14 Maintenance Disassembly 5.
  • Page 4 Safety Precau�ons Contents In Case of Accidents or Emergency .............. 2 Pre-Installa�on ....................2 Opera�on and Maintenance ................2...
  • Page 6 To prevent personal injury, or property or unit damage, CAUTION adhere to all precau�onary measures and instruc�ons 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 sec�ons.
  • Page 7 Specifica�ons 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 ( Power Supply FU-07HSS010/N2-IN FU-07HSS010/N2-OUT 2,64 FU-09HSS010/N2-IN FU-09HSS010/N2-OUT 220-240V~, 50Hz, 3,52 1Phase FU-12HSS010/N2-IN FU-12HSS010/N2-OUT...

  • Page 9: Electrical Wiring Diagrams

    2. Electrical Wiring Diagrams Indoor unit Abbrevia�on Paraphrase Yellow-Green Conductor Posi�ve and Nega�ve Ion Generator Capacitor PLASMA Electronic Dust Collector to CCM Comm.Bus Central Controller (for CAC) X Y E 485 Communica�on Line LIVE NEUTRAL Heater The Electric Hea�ng Belt of Indoor Unit Indoor Room Temperature Coil Temperature of Indoor Heat Exchanger Middle Coil Temperature of Condenser...
  • Page 10 FU-07HSS010/N2-IN, FU-09HSS010/N2-IN, FU-12HSS010/N2-IN FU-18HSS010/N2-IN OPTIONAL INDOOR WIRING DIAGRAM 16022000020455 Applicable to 5(3 or 2) AC motor only OPTIONAL HEATER P1/PN P2/PL SWITCH BOARD CN701 OPTIONAL OPTIONAL HA HB E 12V/5V To CCM Comm.Bus or To Randomly To Remote Alarm To Remote Switch Connected 485 Wire-controller Wire-controller...

  • Page 11: Outdoor Unit

    Outdoor Unit Abbrevia�on Paraphrase 4-WAY Gas Valve Assembly/4-WAY VALVE AC-FAN Alterna�ng Current FAN DC-FAN Direct Current FAN AC Current Detector COMP Compressor L-PRO Low Pressure Switch H-PRO High Pressure Switch FU-07HSS010/N2-IN, FU-09HSS010/N2-IN, FU-12HSS010/N2-IN FU-18HSS010/N2-IN TO INDOOR UNIT 16022000001950 Page 8...
  • Page 12 FU-24HSS010/N2-IN 2(4) 1(3) Symbol 2 indicates compressor internal or external components. Page 7...

  • Page 13: Table Of Contents

    Product Features Contents Opera�on Modes and Func�ons ..............10 Abbrevia�on ..................... 10 Safety Features ....................10 Digital Display ....................10 Fan Mode ......................11 Cooling Mode ................... 11 Hea�ng Mode ....................11 Auto-mode....................11 Drying Mode ..................... 12 Forced Opera�on Func�on ................12 1.10 Auto-Restart Func�on ..................

  • Page 14: Opera�On Modes And Func�Ons

    1. Opera�on Modes and Func�ons Digital Display Unit display func�ons Abbrevia�on Unit element abbrevia�ons Abbrevia�on Element Indoor room temperature Coil temperature of evaporator Coil temperature of condenser Outdoor ambient temperature Func�on Display Safety Features Temperature Set temperature value Temperature Compressor three-minute delay at restart Room temperature (fan and Drying Compressor func�ons are delayed for up to one minute...

  • Page 15: Fan Mode

    Fan Mode of T1-TS. 1.6.3 Outdoor Fan Control When fan mode is ac�vated: The outdoor units have single fan speed. The outdoor • The outdoor fan and compressor are stopped. fan will run following the compressor except when AC • Temperature control is disabled and no temperature is in evaporator high temp.

  • Page 16: Drying Mode

    • This mode can be selected with the remote controller. 1.10 Auto-Restart func�on • In auto mode, the machine selects cooling, hea�ng, or • The indoor unit has an auto-restart module that fan-only mode on the basis of T ( T =T1-Ts). allows the unit to restart automa�cally.

  • Page 17: Informa�On Inquiry

    • Press LED 3 �mes. • The unit will only change modes if the informa�on from the remote control makes it necessary, not from • Press SWING 3 �mes. the unit’s temperature se�ng. • If you are successful, you will hear beeps for a certain •...
  • Page 18 Maintenance and Disassembly Contents Maintenance ....................15 First Time Installa�on Check ................15 Refrigerant Recharge ..................17 Re-Installa�on ....................18 1.3.1 Indoor Unit ..................18 1.3.2 Outdoor Unit ..................20 Disassembly ..................... 22 Indoor Unit ......................22 Outdoor Unit ..................... 34 Page 14...

  • Page 19: Maintenance

    1. Maintenance First Time Installa�on Check To prevent air and moisture from affec�ng the air Air and moisture trapped in the refrigerant system affects condi�oner’s performance, the indoor unit, as well as the the performance of the air condi�oner by: pipes between the indoor and outdoor unit, must be be •...
  • Page 20 Procedure: Tighten the flare nuts of the indoor and outdoor • If the pressure does not achieve -0.1 MPa (14.5 Psi) a�er 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 Connect the charge hose with the push pin of Handle (14.5 Psi), fully close the Handle Lo valve and cease vacuum pump opera�ons.

  • Page 21: Refrigerant Recharge

    Refrigerant Recharge (2OW[OJ YOJK) (5[ZJUUX [TOZ) (/TJUUX [TOZ) :]U-]G_ \GR\K 5VKT (-GY YOJK) :NXKK-]G_ \GR\K )NKIQ \GR\K 5VKT )NGXMOTM I_ROTJKX 56+4 )259+ +RKIZXUTOI YIGRK Prior to recharging the refrigerant, confirm the addi�onal amount of refrigerant required using the following table: Models Standard length Max.

  • Page 22: Re-Installa�On

    Re-Installa�on 1.3.1 Indoor Unit Collec�ng the refrigerant into the outdoor unit (5[ZJUUX [TOZ) (2OW[OJ YOJK) (/TJUUX [TOZ) :]U-]G_ \GR\K )RUYK (-GY YOJK) :NXKK-]G_ \GR\K 5VKT )RUYK )RUYK Procedure: Operate the air condi�oner in cooling mode. Cease Confirm that the 2- and 3-way valves are opened. opera�ons when the gauge reaches 0.1 MPa Remove the valve stem caps and ensure that the valve (14.5 Psi).
  • Page 23 Air purging with vacuum pump (2OW[OJ YOJK) (5[ZJUUX [TOZ) (/TJUUX [TOZ) :]U-]G_ \GR\K )RUYK (-GY YOJK) 3GTOLURJ \GR\K :NXKK-]G_ \GR\K )USVU[TJ SKZKX 6XKYY[XK )RUYK MG[MK -0.l36G .GTJRK 2U .GTJRK .O )NGXMK NUYK )NGXMK NUYK <GI[[S V[SV <GI[[S V[SV Procedure: Tighten the flare nuts of the indoor and outdoor •...

  • Page 24: Outdoor Unit

    1.3.2 Outdoor Unit Evacua�on for the whole system (2OW[OJ YOJK) (/TJUUX [TOZ) (5[ZJUUX [TOZ) :]U-]G_ \GR\K 5VKT (-GY YOJK) :NXKK-]G_ \GR\K 5VKT 56+4 <GI[[S V[SV )259+ Procedure: Close the valve (Low side) on the charge set and turn Confirm that the 2- and 3-way valves are opened. off...
  • Page 25 Refrigerant charging (2OW[OJ YOJK) (5[ZJUUX [TOZ) (/TJUUX [TOZ) :]U-]G_ \GR\K 5VKT (-GY YOJK) :NXKK-]G_ \GR\K )NKIQ \GR\K 5VKT )NGXMOTM I_ROTJKX 56+4 )259+ +RKIZXUTOI YIGRK 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.

  • Page 26: Disassembly

    2. Disassembly Indoor unit Front Panel Procedure Illustra�on 1) Hold the front panel by the tabs on Front Panel the both sides and li� it (see CJ_ AF_001). CJ_AF_001 2) Push up the bo�om of an air filter, and then pull it out downwards (see CJ_AF_002).
  • Page 27 Procedure Illustra�on 3) Open the horizontal louver and push the hook towards le� to open it (see CJ_AF_003). Horizontal Louver Hook CJ_AF_003 4) Bend the horizontal louver lightly by both hands to loosen the hooks, then remove the horizontal louver (see CJ_AF_004).
  • Page 28 Procedure Illustra�on 5) Remove 1 screw and then remove the electrical cover(see CJ_AF_005-1 and CJ_AF_005-2). CJ_AF_005-1 CJ_AF_005-2 6) Disconnect the connector for display board(see CJ_AF_005-3) . CJ_AF_005-3 7) Remove the display board(see CJ_ AF_005-4). CJ_AF_005-4 CJ_AF_005 Note: This sec�on is for reference only. Actual unit appearance may vary. Page 24...
  • Page 29 Procedure Illustra�on 8) Open the screw caps(2) and the remove the screws(see CJ_AF_006). 9) Release the 4 hooks. CJ_AF_006 10)Release the seven hooks in the back (see CJ_AF_007). Hooks CJ_AF_007 Note: This sec�on is for reference only. Actual unit appearance may vary. Page 25...
  • Page 30 Procedure Illustra�on 11)Pull out the panel frame while pushing the hook through a clearance between the panel frame and the heat exchanger (see CJ_AF_008 CJ_AF_008 Panel Frame Note: This sec�on is for reference only. Actual unit appearance may vary. Page 26...
  • Page 31 Electrical parts Note: Remove the front panel (refer to 1. Front panel) before disassembling electrical parts. Procedure Illustra�on 1) Remove the fixing screw and then remove the cover of electronic box and the terminal cover (see CJ_AF_009). Electronic Cover Fixing Screw CJ_AF_009 2) Pull out the room temperature sensor (T1) and the coil temperature sensor...
  • Page 32 Procedure Illustra�on 4) Remove the fixing screw (see CJ_ AF_011-1). 5) Pull out the Electrical control box along the direc�on indicated in right image. to remove it (see CJ_AF_011-2). Fixing Screw CJ_AF_011-1 Electronic Box CJ_AF_011-2 Swing Motor Applicable to AC Motor Only Indoor Fan Motor 6) Disconnect the wires.
  • Page 33 Procedure Illustra�on 7) Remove the fixing screw, then remove the capacitor of fan motor (see CJ_ AF_013). Capacitor of Fan Motor CJ_AF_013 Note: This sec�on is for reference only. Actual unit appearance may vary. Page 29...
  • Page 34 Evaporator Note: Remove the front panel and electrical parts (refer to 1. Front panel and 2. Electrical parts) before disassembling evaporator. Procedure Illustra�on 1) Disassemble the pipe holder located at the rear of the unit (see CJ_AF_014). Pipe Holder CJ_AF_014 2) Remove the screws on the evaporator located at the fixed plate (see CJ_AF_015).
  • Page 35 Procedure Illustra�on 4) Pull out the evaporator (see CJ_AF_017). Evaporator CJ_AF_017 Note: This sec�on is for reference only. Actual unit appearance may vary. Page 31...
  • Page 36 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 Illustra�on 1) Remove the two screws and remove the fixing board of the fan motor (see CJ_ AF_018).
  • Page 37 Step motor Note: Remove the front panel and electrical parts (refer to 1. Front panel, 2. Electrical parts) before disassembling step motor. Procedure Illustra�on 1) Remove the two screws, then remove the stepping motor (see CJ_AF_021). Stepping Motor CJ_AF_021 Note: This sec�on is for reference only. Actual unit appearance may vary. Page 33...

  • Page 38: Outdoor Unit

    Outdoor unit Panel Plate Procedure Illustra�on 4) Remove the screws of the front panel and then remove the front panel (6 screws) (see CJ_AA30_003). Front Panel CJ_AA30_003 5) Remove the screws of water collec�ng cover (1 screw) (see CJ_AA30_004). Water Collec�ng Cover CJ_AA30_004 Note: This sec�on is for reference only.
  • Page 39 Procedure Illustra�on 6) Remove the screws of the right panel and then remove the right panel (6 screws) (see CJ_AA30_005). CJ_AA30_005 The Right Panel Note: This sec�on is for reference only. Actual unit appearance may vary. Page 36...
  • Page 40 FU-07HSS010/N2-OUT; Procedure Illustra�on 1) Turn off the air condi�oner and the power breaker. Big Handle 2) Remove the screws of the big handle and then remove the big handle (1 screws) (see CJ_AB30_001). CJ_AB30_001 Top Cover 3) Remove the screws of the top cover and then remove the top cover (3 screws).
  • Page 41 Procedure Illustra�on 4) Remove the screws of the front panel and then remove the front panel (6 screws) (see CJ_AB30_003). Front Panel CJ_AB30_003 5) Remove the screws of water collec�ng cover (1 screw) (see CJ_AB30_004). Water Collec�ng Cover CJ_AB30_004 Note: This sec�on is for reference only. Actual unit appearance may vary. Page 38...
  • Page 42 Procedure Illustra�on 6) Remove the screws of the right panel and then remove the right panel (5 screws) (see CJ_AB30_005). Right Panel CJ_AB30_005 Note: This sec�on is for reference only. Actual unit appearance may vary. Page 39...
  • Page 43 FU-07HSS010/N2-OUT; Procedure Illustra�on 1) Turn off the air condi�oner and the Big Handle power breaker. 2) Remove the screws of the big handle and then remove the big handle (1 screws) (see CJ_BA30_001). CJ_BA30_001 Top Cover 3) Remove the screws of the top cover and then remove the top cover (3 screws).
  • Page 44 Procedure Illustra�on 4) Remove the screws of the front panel and then remove the front panel (7 screws) (see CJ_BA30_003). Front Panel CJ_BA30_003 5) Remove the screws of water collec�ng Water Collec�ng Cover cover (1 screw) (see CJ_BA30_004). CJ_BA30_004 Note: This sec�on is for reference only. Actual unit appearance may vary. Page 41...
  • Page 45 Procedure Illustra�on 6) Remove the screws of the rear net and then remove the rear net (2 screws) (see CJ_BA30_005). CJ_BA30_005 7) Remove the screws of the right panel and then remove the right panel (5 screws) (see CJ_BA30_006). Right Panel CJ_BA30_006 Note: This sec�on is for reference only.
  • Page 46 FU-12HSS010/N2-OUT; FU-18HSS010/N2-OUT Procedure Illustra�on 1) Turn off the air condi�oner and the power breaker. 2) Remove the screws of the big handle and then remove the big handle Big Handle (1 screws) (see CJ_CA30_001). CJ_CA30_001 3) Remove the screws of the top cover Top Cover and then remove the top cover (3 screws).
  • Page 47 Procedure Illustra�on 4) Remove the screws of the front panel and then remove the front panel (7 screws) (see CJ_CA30_003). Front Panel CJ_CA30_003 5) Remove the screws of water collec�ng cover and then remove the water collec�ng cover (1 screw) (see CJ_ CA30_004).
  • Page 48 Procedure Illustra�on 6) Remove the screws of the right panel and then remove the right panel (6 screws) (see CJ_CA30_005). Right Panel CJ_CA30_005 Note: This sec�on is for reference only. Actual unit appearance may vary. Page 45...
  • Page 49 Fan disassembly Note: Remove the panel plate and (refer to 1. Panel plate) before disassembling fan. FU-07HSS010/N2-OUT; FU-12HSS010/N2-OUT; FU-18HSS010/N2-OUT Procedure Illustra�on 1) Remove the nut securing the fan with a spanner (see CJ_ODU_001). 2) Remove the fan. D-cut CJ_ODU_001 3) Disconnect the connectors for fan motor.
  • Page 50 Procedure Illustra�on 4) Remove the fixing screws of the fan motor (4 screws) (see CJ_ODU_003). 5) Remove the fan motor. Fan Motor CJ_ODU_003 Note: This sec�on is for reference only. Actual unit appearance may vary. Page 47...
  • Page 51 RC-T 76HN/OUT Procedure Illustra�on 1) Remove the nut securing the fan with a spanner (see CJ_ODU_004). 2) Remove the fan. D-cut CJ_ODU_004 Fan Motor 3) Disconnect the connectors for fan motor. (Blue wire, red wire, brown wire and black wire. The blue wire and brown wire are on the capacitor.
  • Page 52 Procedure Illustra�on 4) Remove the fixing screws of the fan motor (4 screws) (see CJ_ODU_006). 5) Remove the fan motor. Fan Motor CJ_ODU_006 Note: This sec�on is for reference only. Actual unit appearance may vary. Page 49...
  • Page 53 Electrical parts Note: Remove the air outlet grille(refer to 1. Panel plate) before disassembling electrical parts. FU-07HSS010/N2-OUT; FU-12HSS010/N2-OUT; FU-18HSS010/N2-OUT Procedure Illustra�on 1) Remove the two screws fixed the electronic control board (see CJ_ ODU_007). Two Fixing Screws 2) Disconnect the wires connected to the compressor.
  • Page 54 FU-24HSS010/N2-OUT Procedure Illustra�on Fan Motor 1) Disconnect the wires connected to the compressor. (Red wire connects 4-Way Valve Compressor with PCB board, others connects with terminals) (see CJ_ODU_008) 2) Disconnect the wires connected to 4-way valve. (see CJ_ODU_008) 3) Disconnect the wires connected to the transformer.
  • Page 55 Procedure Illustra�on 1) Disconnect the wires and remove the fixing screw of the alterna�ng current contactor. (see CJ_ODU_010) CJ_ODU_010 Note: This sec�on is for reference only. Actual unit appearance may vary. Page 52...
  • Page 56 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 Illustra�on 1) Remove the sound blanket (side and top) (see CJ_ODU_011).
  • Page 57 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 Illustra�on 1) Heat up the brazed parts and then detach...
  • Page 58 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 Illustra�on 1) Remove the flange nut of terminal cover and remove the termianal cover (see CJ_ ODU_013).
  • Page 59 Procedure Illustra�on 3) Remove the hex nuts and washers securing the compressor, located on the bo�om plate (see CJ_ODU_015). CJ_ODU_015 Suc�on Pipe 4) Heat up the brazed parts and then remove the the discharge pipe and the suc�on pipe (see CJ_ODU_016). 5) Li�...
  • Page 60 Troubleshoo�ng Contents Safety Cau�on ..................58 General Troubleshoo�ng ................. 59 Error Diagnosis and Troubleshoo�ng Without Error Code ......60 Remote maintenance ..................60 Field maintenance .................... 61 Quick Maintenance by Error Code ..............66 Troubleshoo�ng by Error Code ..............67 Common Check Procedures ................

  • Page 61: Safety Cau�On

    1. Safety Cau�on WARNING Electricity remains in capacitors even when the power supply is off. Ensure the capacitors are fully discharged before troubleshoo�ng. Electroly�c Capacitors For other models, connect discharge resistance (approx.100 40W) or a soldering iron plug between the posi�ve a n d nega�ve terminals of the electroly�c capacitor.

  • Page 62: General Troubleshoo�Ng

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

  • Page 63: Error Diagnosis And Troubleshoo�Ng Without Error Code

    3. Error Diagnosis and Troubleshoo�ng 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 Solu�on Unit will not start Page 62-63...

  • Page 64: Field Maintenance

    Field maintenance Problem Solu�on Unit will not start Page 64-65 Compressor will not start but fans run Page 64-65 Compressor and condenser (outdoor) fan will not start Page 64-65 Evaporator (indoor) fan will not start Page 64-65 Condenser (Outdoor) fan will not start Page 64-65 Unit runs, but shortly stops Page 64-65...
  • Page 65 Test voltage Power failure Close the power switch The main power tripped Inspect connec�ons - �ghten Loose connec�ons Change the transformer Faulty transformer Test voltage The voltage is too high or too low Replace the ba�ery of the remote control The remote control is powered off...
  • Page 66 Check heat load Heavy load condi�on Tighten bolts or screws Loosen hold down bolts and / or screws Close all the windows and doors Bad airproof Remove the obstacles The air inlet or outlet of either unit is blocked Reconnect the power or press ON/OFF Interference from cell phone towers and remote bu�on on remote control to restart boosters...
  • Page 67 Test voltage Power failure Inspect fuse type & size Blown fuse or varistor Inspect connec�ons - �ghten Loose connec�ons Test circuits with tester Shorted or broken wires Test con�nuity of safety device Safety device opens Test con�nuity of thermostat / sensor & wiring Faulty thermostat / room temperature sensor Place the temperature sensor at the central of Wrong se�ng place of temperature sensor...
  • Page 68 Replace the compressor Compressor stuck Leak test Shortage of refrigerant Replace restricted part Restricted liquid line Dirty air filter Clean or replace Clean coil Dirty evaporator coil Check fan Insufficient air through evaporator coil Change charged refrigerant volume Overcharge of refrigerant Clean condenser or remove obstacle Dirty or par�ally blocked condenser Purge, evacuate and recharge...

  • Page 69: Quick Maintenance By Error Code

    4. Quick Maintenance by Error Code If you do not have the �me 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...

  • Page 70: Troubleshoo�Ng By Error Code

    5. Troubleshoo�ng 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, Measure the resistance value of each winding by using the mul�-meter.

  • Page 71: E0(Eeprom Parameter Error)

    E0 (EEPROM parameter error) Descrip�on: Indoor or outdoor PCB main chip does not receive feedback from EEPROM chip. Recommended parts to prepare: • Indoor PCB • Outdoor PCB Troubleshoo�ng and repair: Shut off the power supply and turn it on 2 minutes later. Is it s�ll displaying the error The unit is opera�ng normally.

  • Page 72: E1(Indoor And Outdoor Unit Communica�On Error) (Only For 22K Models)

    E1 (Indoor and outdoor unit communica�on error) (only for 22k models) Descrip�on: The indoor unit has not received feedback from the outdoor unit for 120 seconds. Recommended parts to prepare: • Indoor PCB • Outdoor PCB • Reactor Troubleshoo�ng and repair: Power off, then restart the unit a�er 2 minutes.

  • Page 73: E2 (Zero Crossing Detec�On Error Diagnosis And Solu�On)

    E2 (Zero crossing detec�on error diagnosis and solu�on) Descrip�on: When PCB does not receive zero crossing signal feedback for 4 minutes or the zero crossing signal �me interval is abnormal. Recommended parts to prepare: • Connec�on mistake • PCB faulty Troubleshoo�ng and repair: Check the connec�ons and power supply.

  • Page 74: E3(Fan Speed Has Been Out Of Control Diagnosis And Solu�On)

    E3(Fan speed has been out of control diagnosis and solu�on) Descrip�on: When indoor fan speed keeps too low (300RPM) for certain �me, the unit will stop and the LED will display the failure. Recommended parts to prepare: • Wiring mistake •...
  • Page 75 Index: 1. Indoor AC Fan Motor Power on and set the unit running in fan mode at high fan speed. A�er 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 76: E4/E5/F2 (Open Circuit Or Short Circuit Of Temperature Sensor Diagnosis And Solu�On) (F2 Is Only For 22K Models)

    E4/E5/F2 (Open circuit or short circuit of temperature sensor diagnosis and solu�on) (F2 is only for 22k models) Descrip�on: If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED will display the failure. Recommended parts to prepare: •...

  • Page 77: E7 (Indoor Pcb /Display Board Communica�On Error)

    E7 (Indoor PCB /Display board communica�on error) Descrip�on: Indoor PCB does not receive feedback from Display board. Recommended parts to prepare: • Wiring mistake • Faulty PCB • Display board malfunc�on Troubleshoo�ng and repair: Power off, then restart the unit 2 minutes later.

  • Page 78: Ec (Refrigerant Leakage Detec�On Diagnosis And Solu�On)

    EC (Refrigerant Leakage Detec�on diagnosis and solu�on) Descrip�on: Define the evaporator coil temp.T2 of the compressor just starts running as Tcool. In the beginning 5 minutes a�er the compressor starts up, if T2<Tcool-2°C does not keep con�nuous 4 seconds and this situa�on happens 3 �mes, the display area will show “EC”...
  • Page 79 Contents Temperature Sensor Resistance Value Table for T1, T2, T3, and T4 (°C – K) ..77 Page 76...
  • Page 80 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...

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