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Saijo Denki CVIA-80-CPF3 Service Manual

Outdoor unit, super modular multi system-i
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AIR CONDITIONER (MULTI TYPE)

SERVICE MANUAL

Outdoor Unit
<SUPER MODULAR MULTI SYSTEM-i>
Model name:
CVIA-80-CPF3
CVIA-100-CPF3
CVIA-120-CPF3
CVIA-140-CPF3
CVIA-160-CPF3
CVIA-180-CPF3
CVIA-200-CPF3
CVIA-220-CPF3
CVIA-240-CPF3
CVIA-260-CPF3
CVIA-280-CPF3
CVIA-300-CPF3
CVIA-320-CPF3
CVIA-340-CPF3
CVIA-360-CPF3
CVIA-380-CPF3
CVIA-400-CPF3
CVIA-420-CPF3
CVIA-440-CPF3
CVIA-460-CPF3
CVIA-480-CPF3
CVIA-500-CPF3
CVIA-520-CPF3
CVIA-540-CPF3
CVIA-560-CPF3
Saijo denki International co.,ltd.
FILE No. A10-020-1
REVISION 0 : Aug.2019
Re-edit version.( file volume down)
Contents have NOT been changed.
PRINTED IN THAILAND, Sep, 2019

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Summary of Contents for Saijo Denki CVIA-80-CPF3

  • Page 1: Service Manual

    <SUPER MODULAR MULTI SYSTEM-i> Model name: CVIA-80-CPF3 CVIA-100-CPF3 CVIA-120-CPF3 CVIA-140-CPF3 CVIA-160-CPF3 CVIA-180-CPF3 CVIA-200-CPF3 CVIA-220-CPF3 CVIA-240-CPF3 CVIA-260-CPF3 CVIA-280-CPF3 CVIA-300-CPF3 CVIA-320-CPF3 CVIA-340-CPF3 CVIA-360-CPF3 CVIA-380-CPF3 CVIA-400-CPF3 CVIA-420-CPF3 CVIA-440-CPF3 CVIA-460-CPF3 CVIA-480-CPF3 CVIA-500-CPF3 CVIA-520-CPF3 CVIA-540-CPF3 CVIA-560-CPF3 Saijo denki International co.,ltd. PRINTED IN THAILAND, Sep, 2019...

  • Page 2: Table Of Contents

    Contents Generic Denomination: Air Conditioner New Refrigerant (R410A) 1 Specifications 1.1 VRF IV - Outdoor Units 1.2 VRF IV - Indoor Unit 2 Wiring Diagrams 2.1 Outdoor unit 2.2 Indoor unit 3 Parts Rating 3.1 Outdoor unit 3.2 Outdoor inverter 3.3 Parts layout in outdoor unit 3.4 Parts layout in inverter assembly 3.5 Outdoor (inverter) print circuit board...
  • Page 3 Saijo denki International co.,ltd.

  • Page 4: Generic Denomination: Air Conditioner

    CAUTION troubles of the product after work when an incorrect work has been executed. * Property damage: Enlarged damage concerned to property, furniture, and domestic animal/pet Saijo denki International co.,ltd.

  • Page 5: Warning Indications On The Air Conditioner Unit

    If removing the label during parts replace, stick it as the original. Warning Description indication WARNING ELECTRICAL SHOCK HAZARD Disconnect all remote electric power supplies before servicing. CAUTION High temperature parts. might get burned when removing this panel. Saijo denki International co.,ltd.

  • Page 6: Precautions For Safety

    You may protection receive an electric shock if you fail to heed this warning. Only qualified service person (*1) is allowed to do this kind of work. Saijo denki International co.,ltd.
  • Page 7 When transporting the air conditioner, do not take hold of the bands around the packing carton. You may injure yourself if the bands should break. Be sure that a heavy unit (10kg or heavier) such as a compressor is carried by two persons. Saijo denki International co.,ltd.
  • Page 8 When the air conditioner has been installed or relocated, follow the instructions in the Installation Manual and urge the air completely so that no gases other than the refrigerant will be mixed in the refrigerating cycle. Failure to purge the air completely may cause the air conditioner to malfunction. Saijo denki International co.,ltd.
  • Page 9 The charge hose must be connected in such a way that it is not slack. For the installation/moving/reinstallation work, follow to the Installation Manual. If an incorrect installation is done, a trouble of the refrigerating cycle, water leak, electric shock or fire is caused. Saijo denki International co.,ltd.
  • Page 10 If you fail to heed this warning, you will run the risk of burning yourself because the fan motor, reactor, inverter heat sink and other parts will be very hot to the touch. In addition, before proceeding with the repair work, wear the kind of insulated heat-resistant gloves designed to protect electricians. Saijo denki International co.,ltd.
  • Page 11 (*1) Refer to the “Definition of Qualified Installer or Qualified Service Person.” Saijo denki International co.,ltd.

  • Page 12: Carrying In The Outdoor Unit

    (Apply padding in positions where the rope comes in contact with the outdoor unit so that no damage is caused to the outer surface of the outdoor unit.) (There are reinforcing plates on the side surfaces, so the rope cannot be passed through.) Saijo denki International co.,ltd.
  • Page 13 Weight centre and weight Weight centre of an outdoor unit Unit: in (mm) OUTDOOR Weight MODEL (mm) (mm) (mm) (kg) COOLING ONLY CVIA-80-CPF3 CVIA-100-CPF3 CVIA-120-CPF3 CVIA-140-CPF3 Saijo denki International co.,ltd.

  • Page 14: Adding Refrigerant

    HP of cooperating liquid pipe (Table 1) outdoor units (Table 2) Table 1 + Liquid pipe dia. (mm) 6.40 9.50 12.70 15.90 19.10 22.20 Additional refrigerant amount/1m liquid pipe 0.025 0.055 0.105 0.160 0.250 0.350 (kg/m) Saijo denki International co.,ltd.
  • Page 15 COOL mode, and then charge refrigerant into service port at the gas side. In this time, choke the refrigerant slightly by operating the valve of the canister to charge liquid refrigerant. • The liquid refrigerant may be charged suddenly, therefore be sure to charge refrigerant gradually. Saijo denki International co.,ltd.

  • Page 16: New Refrigerant (R410A)

    Use the flare nuts which are attached to the air conditioner unit. (2) Joint The flare joint and socket joint are used for joints of the copper pipe. The joints are rarely used for installation of the air conditioner. However clear impurities when using them. Saijo denki International co.,ltd.
  • Page 17 (3) Pipe cutter (11)Tape measure (4) Reamer (12)Metal saw (5) Pipe bender (6) Level vial Also prepare the following equipments for other installation method and run check. (1) Clamp meter (3) Insulation resistance tester (2) Thermometer (4) Electroscope Saijo denki International co.,ltd.
  • Page 18 OUT: 35°C DB / 24°C WB 2. WB: Wet Bulb Temp (°C) Cooling T3 3. The specification are based on testing at Saijo Denki factory. 4. The specification are subject to change without prior notice. IN: 29°C DB / 19°C WB OUT: 46°C DB / 24°C WB...
  • Page 19 OUT: 35°C DB / 24°C WB 2. WB: Wet Bulb Temp (°C) Cooling T3 3. The specification are based on testing at Saijo Denki factory. 4. The specification are subject to change without prior notice. IN: 29°C DB / 19°C WB OUT: 46°C DB / 24°C WB...
  • Page 20 IN: 27°C DB / 19°C WB OUT: 35°C DB / 24°C WB 2. WB: Wet Bulb Temp (°C) 3. The specification are based on testing at Saijo Denki factory. Cooling T3 IN: 29°C DB / 19°C WB 4. The specification are subject to change without prior notice.
  • Page 21 2. WB: Wet Bulb Temp (°C) OUT: 35°C DB / 24°C WB Cooling T3 3. The specification are based on testing at Saijo Denki factory. 4. The specification are subject to change without prior notice. IN: 29°C DB / 19°C WB OUT: 46°C DB / 24°C WB...

  • Page 22: Specifications

    12.70 15.87 Material Copper Tube Tube Diameter Coil Material Anti-Corrosive Pre-Coated Aluminium Blue Fin Notes. 1. The specification are based on testing at Saijo Denki factory. 2. The specification are subject to change without prior notice. Saijo denki International co.,ltd.
  • Page 23 12.70 15.87 Material Copper Tube Tube Diameter Coil Material Anti-Corrosive Pre-Coated Aluminium Blue Fin Notes. 1. The specification are based on testing at Saijo Denki factory. 2. The specification are subject to change without prior notice. Saijo denki International co.,ltd.
  • Page 24 12.70 15.87 Material Copper Tube Tube Diameter Coil Material Anti-Corrosive Pre-Coated Aluminium Blue Fin Notes. 1. The specification are based on testing at Saijo Denki factory. 2. The specification are subject to change without prior notice. Saijo denki International co.,ltd.
  • Page 25 15.87 Material Copper Tube Tube Diameter 9.52 Coil Material Anti-Corrosive Pre-Coated Aluminium Blue Fin Notes. 1. The specification are based on testing at Saijo Denki factory. 2. The specification are subject to change without prior notice. Saijo denki International co.,ltd.
  • Page 26 1. DB: Dry Bulb Temp (°C) OUT: 35°C DB / 24°C WB 2. WB: Wet Bulb Temp (°C) 3. The specification are based on testing at Saijo Denki factory. Cooling T3 IN: 29°C DB / 19°C WB 4. The specification are subject to change without prior notice.
  • Page 27 OUT: 35°C DB / 24°C WB 2. WB: Wet Bulb Temp (°C) Cooling T3 3. The specification are based on testing at Saijo Denki factory. IN: 29°C DB / 19°C WB 4. The specification are subject to change without prior notice.
  • Page 28 12.70 15.87 Material Copper Tube Tube Diameter Material Anti-Corrosive Pre-Coated Aluminium Blue Fin Coil Notes. 1. The specification are based on testing at Saijo Denki factory. 2. The specification are subject to change without prior notice. Saijo denki International co.,ltd.

  • Page 29: Wiring Diagrams

    2 Wiring Diagrams 2.1 Outdoor unit Models : CVIA-80-CPX3 / CVIA-100-CPX3 / CVIA-120-CPX3 / CVIA-140-CPX3 Saijo denki International co.,ltd.

  • Page 30: Indoor Unit

    Wiring Diagrams Indoor unit Models : SWV-09-A-VTGP1 / SWV-13-A-VTGP1 / SWV-20-A-VTGP1 / SWV-25-A-VTGP1 / SWV-30-A-VTGP1 / SWV-36-A-VTGP1 Saijo denki International co.,ltd.
  • Page 31 Wiring Diagrams 2.2 Indoor unit Models : SCV-13-A-VTGP1 / SCV-20-A-VTGP1 / SCV-25-A-VTGP1 / SCV-30-A-VTGP1 / SCV-36-A-VTGP1 / SCV-50-A-VTGP1 / SCV-60-A-VTGP1 Saijo denki International co.,ltd.
  • Page 32 Wiring Diagrams Indoor unit Models : SUV-13-A-VTGP1 / SUV-20-A-VTGP1 / SUV-25-A-VTGP1 Saijo denki International co.,ltd.
  • Page 33 Wiring Diagrams Indoor unit Models : SUV-30-A-VTGP1 / SUCV-36-A-VTGP1 / SUV-50-A-VTGP1 / SUV-60-A-VTGP1 Saijo denki International co.,ltd.
  • Page 34 Wiring Diagrams Indoor unit Models : SFV-30-A-VTGP1 / SFV-36-A-VTGP1 /SFV-50-A-VTGP1 /SFV-60-A-VTGP1 /SFV-80-A-VTGP1 / SFV-120-A-VTGP1 Saijo denki International co.,ltd.
  • Page 35 Wiring Diagrams Indoor unit Models : SDV-13L-A-VTGP1 / SDV-20L-A-VTGP1 / SDV-25L-A-VTGP1 / SDV-30L-A-VTGP1 / SDV-36L-A-VTGP1 / SDV-50L-A-VTGP1 /SDV-60L-A-VTGP1 Saijo denki International co.,ltd.
  • Page 36 OUT: 35°C DB / 24°C WB 2. WB: Wet Bulb Temp (°C) Cooling T3 3. The specification are based on testing at Saijo Denki factory. IN: 29°C DB / 19°C WB 4. The specification are subject to change without prior notice.
  • Page 37 Wiring Diagrams Indoor unit Models : SDV-13M-A-VTGP1 / SDV-60M-A-VTGP1 Saijo denki International co.,ltd.
  • Page 38 22.22 28.57 Material Copper Tube Tube Diameter Material Anti-Corrosive Pre-Coated Aluminium Blue Fin Coil Notes. 1. The specification are based on testing at Saijo Denki factory. 2. The specification are subject to change without prior notice. Saijo denki International co.,ltd.
  • Page 39 Wiring Diagrams Indoor unit Models : SDV-13H-A-VTGP1 / SDV-20H-A-VTGP1 / SDV-25H-A-VTGP1 / SDV-30H-A-VTGP1 / SDV-50H-A-VTGP1 / SDV-80H-A-VTGP1 / SDV-60H-A-VTGP1 / SDV-120H-A-VTGP1 Saijo denki International co.,ltd.

  • Page 40: Parts Rating

    Inverter P.C. board [Outdoor control] MNCM1A Drive IPM M75CL1A120#350G 75A 1200V Axial Fan A2175-HBL Ball, 240 VAC, 172 mm, 51 mm Run Capacitor x 2 GXA2G272Y 2700 uF / 400 V Transformer 220 V / 12-0-12V Saijo denki International co.,ltd.

  • Page 42: Parts Layout In Outdoor Unit

    3-3. Parts layout in outdoor unit Models : CVIA-80-CPX3 / CVIA-140-CPX3 Compress Reciving tank Liqid tank ACCUMULATOR Saijo denki International co.,ltd.

  • Page 43: Parts Layout In Inverter Assembly

    3-4. Parts layout in inverter assembly Models : CVIA-80-CPX3 / CVIA-140-CPX3 P.C. Board Control DC. Fan Power Supply Inverter P.C. Board Terminal 6P For Control Inverter P.C Board For Compressor Saijo denki International co.,ltd.
  • Page 44 3-5. Outdoor (inverter) P.C. board 3-5-1. P.C. board (MNCM1B) Power Supply J1 , J9 RS485 High pressure 7-segment LED pressure Sensor Ambient (P2) Sensor Condenser (P3) Sensor Suction (P5) Seneor Discharge (P6) Saijo denki International co.,ltd.

  • Page 45: Inverter P.c. Board For Compressor (Mobled360)

    W-phase Coppressor out V-phase Coppressor out U-phase Reactor Connecting Terminal N Reactor Connecting Terminal P Power Supply J206 J208 Power Supply R Power Supply T Power Supply S Connector Address set P4 RS 485 Communication Saijo denki International co.,ltd.

  • Page 48: Inverter P.c. Board For Fan (Mnfdc5A)

    3-5-3. Inverter P.C. board for fan (MNFDC5A) Display Power Supply Connector DC. Fan Saijo denki International co.,ltd.
  • Page 49 Symbol Service valve Check joint Temperature Saijo denki International co.,ltd.

  • Page 50: Refrigerant Piping Systematic Drawing

    Refrigerant Piping Systematic Drawing Models : CVIA-80-CPX3 / CVIA-100-CPX3 / CVIA-120-CPX3 / CVIA-140-CPX3 SINGLE COMPRESSOR Symbol Service valve Check joint Temperature Saijo denki International co.,ltd.
  • Page 51 Compressor 1 Compressor 2 Low pressure switch Hi pressuer switch Accumulator Oil seperator Heat exchanger Fan motor Check valve Liquid Receiver tank Thermistor (Ambient) Thermistor (Condenser) Thermistor (Suction) Thermistor (Discharge Compressor 1) Thermistor (Discharge Compressor 2) Saijo denki International co.,ltd.

  • Page 52: Address Setting

    Can set the address of the indoor unit in the system automatically via the control board in the outdoor unit that is the master. Process 1. Press Status On-screen will be shown "CONTROL" LED Control Status Button Saijo denki International co.,ltd.
  • Page 53 2. Press IND/OUTD and hold 3 seconds unit reach to ID automatic set mode. On-screen will be shown "Auto" IND/OUT Button Status screen 3. Press the RESET button to start ID automatic setup. Running-led light show on-screen 10 minutes, approximate. Running LED on-screen RESET Button Saijo denki International co.,ltd.
  • Page 54 5. The ID of the indoor unit can be checked by pressing ID button for level up or ON/OFF button for level down. Press ID for level up Press ON/OFF for Level down 6. Press the STATUS button to exit the setup mode. Saijo denki International co.,ltd.

  • Page 55: Manual Address Setting Using The Remote Controller

    1. Press the SET button and hold 10 seconds until the screen shows the ID number. 2. Press UP/DOWN to set up the ID number. Show “A” Show2 digits number When the remote controller is in setup ID status Saijo denki International co.,ltd.

  • Page 56: Manual Address Setting Using The Indoor Unit Display

    3. Press ON/Off to change the ID number with in the range 0-63. ID number in the range 0-63 When the remote controller is in setup ID status 6.2 Confirm the indoor unit addresses When the remote controller is in home page status Saijo denki International co.,ltd.

  • Page 57: Test Run

    Operate the system by using the wired remote controller 1. Turning on the power 2. Press Mode button to operate in cool mode 3. Press Fan speed to operate in speed HiHi 4. Press Down button to operate in 15 C Saijo denki International co.,ltd.
  • Page 58 1. Press Status button unit the LED Control light up, which indicated in control mode. LED Control STATUS Button 2. Press IND/OUTD button unit LED Control light up, which Indicated in indoor unit control. LED Indoor IND/OUTD Button Saijo denki International co.,ltd.
  • Page 59 ID Button Right screen shown ID of Indoor unit 00: Power off 4. Press ON/OFF to open Indoor unit. ON/OFF Button Right screen shown status of Indoor unit 00 : Power off 01 : Power on Saijo denki International co.,ltd.

  • Page 60: Error Code

    6SP431G-00015 ( R ) 6SP431G-00016 ( L ) Indoor Antifreeze protection There is freezing at cooling coil. 6SP511A-00049 6SP511A-0004701 - Check speed of fan motor Fan motor - Check the quantity of working fluid in the system Saijo denki International co.,ltd.

  • Page 61: Error Code

    Cross flow fan 6SP431J-0000702 6SP431J-0000702 6SP431J-0000702 6SP431J-0000702 6SP431J-0000702 6SP431J-0000702 6SP431J-0000702 Indoor Antifreeze protection There is freezing at cooling coil. 6SP511A-00090 - Check speed of fan motor Fan motor - Check the quantity of working fluid in the system Saijo denki International co.,ltd.
  • Page 62 Cross flow fan ( L ) Indoor Antifreeze protection There is freezing at cooling coil. 6SP511A-0008103 6SP511A-0002307 6SP511A-00014 - Check speed of fan motor Fan motor 6SP511A-0002307 - Check the quantity of working fluid in the system Saijo denki International co.,ltd.
  • Page 63 Cross flow fan 6SP431J-00004 Cross flow fan Indoor Antifreeze protection There is freezing at cooling coil. 6SP511A-00002 6SP511A-0000704 6SP511A-00008 - Check speed of fan motor Fan motor - Check the quantity of working fluid in the system Saijo denki International co.,ltd.

  • Page 64: Error Code

    Cross flow fan ( L ) Indoor Antifreeze protection There is freezing at cooling coil. 6SP511A-00014 6SP511A-0002307 6SP511A-00014 6SP511A-0002307 - Check speed of fan motor Fan motor - Check the quantity of working fluid in the system Saijo denki International co.,ltd.
  • Page 65 Cross flow fan ( L ) 6SP431D-00041 Indoor Antifreeze protection There is freezing at cooling coil. - Check speed of fan motor Fan motor 6SP511A-0002307 6SP511A-00014 6SP511A-0005101 6SP511A-0005601 - Check the quantity of working fluid in the system Saijo denki International co.,ltd.
  • Page 66 Cross flow fan ( L ) 6SP431D-00041 Indoor Antifreeze protection There is freezing at cooling coil. 6SP511A-0002307 6SP511A-0005003 6SP511A-0005101 6SP511A-0005601 6SP511A-0005502 Fan motor - Check speed of fan motor - Check the quantity of working fluid in the system Saijo denki International co.,ltd.
  • Page 67 2 is overheated. - Check operation of compressor 2 Compressor 2 ANB78FVAMT 6SP200S-3510002 - Check resistance of sensor at compressor Sensor Discharge 2 2 outlet - Check reading sensor of slave board Slave board 6SP505AMWB268S01 Saijo denki International co.,ltd.
  • Page 68 Driver Over Current compressor 1 is higher than the specified value. - Check blockage of refrigerant piping - Check control board of compressor 1 Control board 1 6SP505AMWB313SS01 - Check operation of compressor 1 Compressor 1 ANB78FVAMT 6SP200S-3510002 Saijo denki International co.,ltd.
  • Page 69 Driver Starting Fail compressor 2. - Check blockage of refrigerant piping 6SP505AMWB313SS01 - Check control board of compressor 2 Control Board 2 6SP200S-3510002 - Check operation of compressor 2 Compressor 2 ANB78FVAMT Saijo denki International co.,ltd.

  • Page 70: Flow Chart Error Code

    There is an error in the drainage of the indoor unit Is drain pipe have Piping drain cleaning blockage? Is dain pump work Change the water pump normal ? Is float switch struck or Chang the float work normal? Chang the control board Saijo denki International co.,ltd.
  • Page 71 Is sensor connect on Correct connector connection control board position P1 ? Is the wire of sensor Change the sensor normal ? Is sensor resistance Change the sensor normal ? Chang the control board Saijo denki International co.,ltd.
  • Page 72 Evaporator inlet. Is sensor connect on Correct connector connection control board position P2 ? Is the wire of sensor Change the sensor normal ? Is sensor resistance Change the sensor normal ? Chang the control board Saijo denki International co.,ltd.
  • Page 73 Evaporator outlet. Is sensor connect on Correct connector connection control board position P3 ? Is the wire of sensor Change the sensor normal ? Is sensor resistance Change the sensor normal ? Chang the control board Saijo denki International co.,ltd.
  • Page 74 There is an error in the cooling motor of the Error 06 Indoor unit Motor fail Indoor unit. Is motor connect to Correct connector connection on control board correct ? control board Change the motor Is motor normal ? Chang the control board Saijo denki International co.,ltd.
  • Page 75 Check the coil and fan Cleaning the coil and fan blades blades Check speed of fan Change the motor motor Check system Check the quantity of working fluid in the system Refill fluid in the system Saijo denki International co.,ltd.
  • Page 76 Is connector and wiring between Correct connector connection and master board and slave board check circuit wiring correct ? Is jumper on slave Correct setting board correct ? Is slave board normal? Change the slave board Check the master board Saijo denki International co.,ltd.
  • Page 77 Is connector and wiring between Correct connector connection and master board and indoor unit check wiring board correct ? Is indoor unit power on? On power Is all indoor control Change indoor control board board normal? Check master control board Saijo denki International co.,ltd.
  • Page 78 Is sensor connect on Correct connector connection control board ? Is the wire of the sensor Change the sensor normal ? Is sensor resistance Change the sensor normal ? Check the control board Saijo denki International co.,ltd.
  • Page 79 Inlet. Is sensor connect on Correct connector connection control board ? Is the wire of the sensor Change the sensor normal ? Is sensor resistance Change the sensor normal ? Check the control board Saijo denki International co.,ltd.
  • Page 80 Outlet. Is sensor connect on Correct connector connection control board ? Is the wire of the sensor Change the sensor normal ? Is sensor resistance Change the sensor normal ? Check the control board Saijo denki International co.,ltd.
  • Page 81 Is sensor connect on Correct connector connection control board ? Is the wire of the sensor Change the sensor normal ? Is sensor resistance Change the sensor normal ? Check the control board Saijo denki International co.,ltd.
  • Page 82 1 outlet. Is sensor connect on Correct connector connection control board ? Is the wire of the sensor Change the sensor normal ? Is sensor resistance Change the sensor normal ? Check the control board Saijo denki International co.,ltd.
  • Page 83 2 outlet. Correct connector connection Is sensor connect on control board ? Is the wire of the sensor Change the sensor normal ? Is sensor resistance Change the sensor normal ? Check the control board Saijo denki International co.,ltd.
  • Page 84 ? Is the coil resistance of the Change the compressor compressor 1 normal ? Is operation of the compressor 1 control check control board board normal ? Chang the control board Saijo denki International co.,ltd.
  • Page 85 ? Is the coil resistance of the Change the compressor compressor 2 normal ? Is operation of the compressor 2 control check control board board normal ? Chang the control board Saijo denki International co.,ltd.
  • Page 86 Cleaning exchanger ? Is outdoor unit fan motor Check the fan motor normal ? Is resistance of the sensor Chang the sensor at discharge pipe compressor 1 normal ? Check the control board Saijo denki International co.,ltd.
  • Page 87 Cleaning exchanger ? Is outdoor unit fan motor Check the fan motor normal ? Is resistance of the sensor Chang the sensor at discharge pipe compressor 2 normal ? Check the control board Saijo denki International co.,ltd.
  • Page 88 Tighten the screw heatzink normal ? Is silicon between control board of compressor and Heatxink Refill silicon to control board normal? Is resistance of temperature sensor at Replace the sensor heatzink normal? Check the control board Saijo denki International co.,ltd.
  • Page 89 Tighten the screw heatzink normal ? Is silicon between control board of compressor and Heatxink Refill silicon to control board normal? Is resistance of temperature sensor at Replace the sensor heatzink normal? Check the control board Saijo denki International co.,ltd.
  • Page 90 ? Is outdoor unit fan Check fan motor motor normal ? Is there high refrigerant Correct refrigerant amount Is resistance of temperature sensor at Chang the sensor outdoor unit heat exchanger normal? Check the control board Saijo denki International co.,ltd.
  • Page 91 ? Is outdoor unit fan Check fan motor motor normal ? Is there high refrigerant Correct refrigerant amount Is High pressure switch Check High pressure switch work normal ? Check the control board Saijo denki International co.,ltd.
  • Page 92 Does refrigerant shortage Fix refrigerant problem or clogging Are all indoor unit EXV Check indoor unit EXV work normal? Is low pressure switch Check Low pressure switch work normal ? Check the control board Saijo denki International co.,ltd.
  • Page 93 The voltage of compressor is lower than the limit. Is the supply voltage to Check power voltage to control board the heat control board normal? Is wiring size of power Chang wiring size supply to outdoor unit correct ? Check the control board Saijo denki International co.,ltd.
  • Page 94 Check fan motor motor normal ? Check power voltage Is the supply voltage to the outdoor unit normal? Is there cloging in the Correct refrigerant system refrigerant system ? Check compressor Is compressor working normal? Check control board Saijo denki International co.,ltd.
  • Page 95 Check fan motor motor normal ? Check power voltage Is the supply voltage to the outdoor unit normal? Is there cloging in the Correct refrigerant system refrigerant system ? Check compressor Is compressor working normal? Check control board Saijo denki International co.,ltd.
  • Page 96 Check fan motor motor normal ? Check power voltage Is the supply voltage to the outdoor unit normal? Is there cloging in the Correct refrigerant system refrigerant system ? Check compressor Is compressor working normal? Check control board Saijo denki International co.,ltd.
  • Page 97 Check fan motor motor normal ? Check power voltage Is the supply voltage to the outdoor unit normal? Is there cloging in the Correct refrigerant system refrigerant system ? Check compressor Is compressor working normal? Check control board Saijo denki International co.,ltd.
  • Page 98 Check fan motor motor normal ? Check power voltage Is the supply voltage to the outdoor unit normal? Is there cloging in the Correct refrigerant system refrigerant system ? Is compressor working Check compressor normal? Check control board Saijo denki International co.,ltd.
  • Page 99 Check fan motor motor normal ? Check power voltage Is the supply voltage to the outdoor unit normal? Is there cloging in the Correct refrigerant system refrigerant system ? Check compressor Is compressor working normal? Check control board Saijo denki International co.,ltd.
  • Page 100 Voltage Error compressor 1. Is power supply voltage Check power supply to outdoor unit normal? Is the capacitance of the Check capacitor for control capacitor in the control box of compressor compressor normal? Check control board Saijo denki International co.,ltd.
  • Page 101 Bus Voltage Error compressor 2. Is power supply voltage Check power supply to outdoor unit normal? Is the capacitance of the Check capacitor for control capacitor in the control box of compressor compressor normal? Check control board Saijo denki International co.,ltd.
  • Page 102 Check jumper setting compressor normal? Compressor 1 is set as 1 Compressor 2 is set as 2 Is control board of compressor working Check control board of compressor normal? Check slave control board Saijo denki International co.,ltd.
  • Page 103 Is the supply voltage to the Check power voltage to control board outdoor unit control board normal? Is wiring connection from control board to compressor Correct wiring connection correct ? Is control board Check control board working normal? Check compressor Saijo denki International co.,ltd.
  • Page 104 Is the supply voltage to the outdoor unit control board Check power voltage to control board normal? Is wiring connection from Correct wiring connection control board to compressor correct ? Is control board Check control board working normal? Check compressor Saijo denki International co.,ltd.
  • Page 105 1. Connect the cable of the RS-485 converter to the P5 position master board. 2. Connect the cable of the RS-485 converter to the computer. 3. Open the monitor program Signal converter RS 485 Master Board Saijo denki International co.,ltd.

This manual is also suitable for:

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