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Fujitsu AB*30LBAG series Service Instruction

Large ceiling type inverter
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Table of Contents
SERVICE
INSTRUCTION
R410A
SPLIT TYPE
ROOM AIR CONDITIONER
Large Ceiling
INVERTER
Models Indoor unit Outdoor unit
AB*30LBAG
AB*36LBAG
AB*45LBAG
type
AO*30LMBWL
AO*36LMBWL
AO*45LJBYL

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  Summary of Contents for Fujitsu AB*30LBAG series

  • Page 1 SPLIT TYPE ROOM AIR CONDITIONER Large Ceiling type INVERTER SERVICE INSTRUCTION Models Indoor unit Outdoor unit AO*30LMBWL AB*30LBAG AO*36LMBWL AB*36LBAG AB*45LBAG AO*45LJBYL R410A...

  • Page 2: Table Of Contents

    CONTENTS 1. SPECIFICATIONS SPECIFICATIONS......................01-01 2. DIMENSIONS DIMENSIONS........................02-01 3. REFRIGERANT SYSTEM DIAGRAM REFRIGERANT CIRCUIT....................03-01 4. CIRCUIT DIAGRAM CIRCUIT DIAGRAM......................04-01 5. DESCRIPTION OF EACH CONTROL OPERATION 5-1 COOLING OPERATION.................... 05-01 5-1-1 COOLING CAPACITY CONTROL..............05-01 5-2 HEATING OPERATION..................... 05-02 5-2-1 HEATING CAPACITY CONTROL..............
  • Page 3 6. REFRIGERANT CAUTION -R410A- 6-1 R410A TOOLS......................06-01 6-2 PRECAUTION FOR INSTALLATION................. 06-02 6-3 PRECAUTION FOR SERVICING................06-04 6-4 NEW REFRIGERANT R410A..................06-05 6-5 DEFFERENCE FROM CONVENTIONAL MODEL (R22) AND PRECAUTIONS..06-08 7. TROUBLE SHOOTING 7-1 ERROR DISPLAY...................... 07-01 7-1-1 INDOOR UNIT DISPLAY..................07-01 07-02 7-1-2 OUTDOOR UNIT DISPLAY................
  • Page 4 10. REPLACEMENT PARTS 1 REPLACEMENT PARTS ( For OUTDOOR UNIT )............10-01 1-1 For AO*30/ 36LMBWL..................... 10-01 1-1-1 PARTS LAYOUT DRAWING................10-01 1-1-2 WIRING........................ 10-03 1-1-3 DISASSEMBLY PROCESS................. 10-04 1-1-4 ASSEMBLY PROCESS of INVERTER UNIT............10-09 1-2 For AO*45LJBYL..................... 10-14 1-2-1 PARTS LAYOUT DRAWING................

  • Page 5: Specifications

    R410A Large Ceiling type INVERTER 1 . SPECIFICATIONS...
  • Page 6 1. SPECIFICATIONS CEILING MODELS TYPE INVERTER HEAT PUMP INDOOR AB 30LBAG AB 36LBAG MODEL NAME OUTDOOR AO 30LMBWL AO 36LMBWL POWER SOURCE 230V 50Hz AVAILABLE VOLTAGE RANGE 198-264V 50Hz EUROPEAN ENERGY LABEL COOLING 8.50/10.00 10.0/11.20 COOLING RATED/MAX BTU/h 29000/34100 34100/38200 CAPACITY 10.00/11.20 10.8/12.77...

  • Page 7: Dimensions

    CEILING MODELS TYPE INVERTER HEAT PUMP TYPE INDOOR AB 45LBAG MODEL NAME OUTDOOR AO 45LJBYL POWER SOURCE 230V 50Hz AVAILABLE VOLTAGE RANGE 198-264V 50Hz 12.5/14.0 COOLING RATED/MAX BTU/h 42700/47800 CAPACITY 14.0/16.0 HEATING RATED/MAX BTU/h 47800/54600 COOLING RATED/MAX 4.45/5.15 INPUT POWER HEATING RATED/MAX 4.25/4.60...

  • Page 8: Dimensions

    R410A Large Ceiling type INVERTER 2 . DIMENSIONS...
  • Page 9 2. DIMENSIONS MODEL : AB*30/ 36LBAG (Unit : mm) Hole for lifting bolt (Use M10 screw bolt) Knock out hole for refrigerant piping Knock out hole for fresh air Side view Rear view Bottom view Refrigerant piping Refrigerant piping Drain piping connection flare connection (Gas) flare connection (Liquid) (Drain pipe : I.D.
  • Page 10 MODEL : AB*45LBAG (Unit : mm) Hole for lifting bolt (Use M10 screw bolt) Knock out hole for refrigerant piping Knock out hole for fresh air Side view Rear view Bottom view Refrigerant piping Refrigerant piping Drain piping connection flare connection (Gas) flare connection (Liquid) (Drain pipe : I.D.

  • Page 11: Refrigerant System Diagram

    R410A Large Ceiling type INVERTER 3 . REFRIGERANT SYSTEM DIAGRAM...

  • Page 12: Refrigerant Circuit

    3. REFRIGERANT CIRCUIT MODEL : AB*30/ 36LBAG / AO*30/ 36LMBWL Outdoor Unit Indoor Unit PRESSURE Refrigerant Pipe CHECK VALVE Ø15.88mm(5/8") HIGH PRESSURE SWITCH Charging Valve 4-Way valve ACCUMULATOR CONDENSER EVAPOLATOR COMPRESSOR EXPANSION VALVE STRAINER STRAINER Refrigerant Pipe Ø9.52mm(3/8") Charging Valve THERMISTOR(DISCHARGE TEMP.) THERMISTOR(ROOM TEMP.) THERMISTOR(OUTDOOR TEMP.)
  • Page 13 MODEL : AB*45LBAG / AO*45LJBYL Outdoor Unit Indoor Unit PRESSURE Refrigerant Pipe CHECK VALVE Ø15.88mm(5/8") HIGH PRESSURE SWITCH Charging Valve MUFFLER 4-Way valve ACCUMULATOR CONDENSER EVAPOLATOR STRAINER COMPRESSOR EXPANSION VALVE STRAINER STRAINER Refrigerant Pipe Ø9.52mm(3/8") Charging Valve THERMISTOR(DISCHARGE TEMP.) THERMISTOR(ROOM TEMP.) THERMISTOR(OUTDOOR TEMP.) THERMISTOR(PIPE TEMP.) THERMISTOR(PIPE TEMP.)

  • Page 14: Circuit Diagram

    R410A Large Ceiling type INVERTER 4 . CIRCUIT DIAGRAM...
  • Page 15 4. CIRCUIT DIAGRAM MODEL : AB*30/ 36/ 45LBAG THERMISTOR(ROOM TEMP.) THERMISTOR(PIPE TEMP.) FAN MOTOR CAPACITOR WHITE WHITE CN201 BROWN STEP MOTOR (UP / DOWN) ORANGE BROWN YELLOW WHITE BLUE ORANGE PURPLE YELLOW GRAY WHITE STEP MOTOR (LEFT / RIGHT) FAN MOTOR GRAY BROWN PURPLE...
  • Page 16 MODEL : AO*30/ 36LMBWL EMI FILTER CONNECTOR CN21 CN22 CN23 CN26 CN25 HIGH PRESSURE SW W305 CN37 COMPRESSOR BLACK SOLENOID WHITE WHITE CN30 FUSE BLACK COIL W304 F4 T 5A 250V BLACK BLACK W303 BLACK PRINTED FAN MOTOR CN800 BROWN WHITE CIRCUIT ACTIVE...
  • Page 17 MODEL : AO*45LJBYL EMI FILTER CONNECTOR CN21 CN22 CN23 CN26 CN25 HIGH PRESSURE SW W305 CN37 COMPRESSOR BLACK SOLENOID WHITE WHITE CN30 COIL FUSE BLACK W304 F4 T 5A 250V F2 T 3.15A 250V BLACK BLACK W303 BLACK PRINTED CN800 FAN MOTOR 1 BROWN WHITE...

  • Page 18: Description Of Each Control Operation

    R410A Large Ceiling type INVERTER 5 . DESCRIPTION OF EACH CONTROL OPERATION...

  • Page 19: Cooling Operation

    5-1. COOLING OPERATION 5-1-1 COOLING CAPACITY CONTROL A sensor (room temperature thermistor) built in the indoor unit will usually perceive difference or variation between a set temperature and present room temperature, and controls the operation frequency of the compressor. * If the room temperature is 2 degC higher than a set temperature, the compressor operation frequency will attain to maximum performance.

  • Page 20: Heating Operation

    5-2. HEATING OPERATION 5-2-1 HEATING CAPACITY CONTROL A sensor (room temperature thermistor) built in the indoor unit will usually perceive difference or variation between a set temperature and present room temperature, and controls the operation frequency of the compressor. * If the room temperature is lower 3 degC than a set temperature, the compressor operation frequency will attain to maximum performance.

  • Page 21: Dry Operation

    5-3. DRY OPERATION 5-3-1 INDOOR UNIT CONTROL The compressor rotation frequency shall change according to set temperature and room temperature variation which the room temperature sensor of the indoor unit has detected as shown in the Table 3. ( Table 3 : Compressor frequency ) Operating frequency 45Hz AB*30LBAG...

  • Page 22: Auto Changeover Operation

    5-4. AUTO CHANGEOVER OPERATION When the air conditioner is set to the AUTO mode by remote control, operation starts in the optimum mode from among the HEATING, COOLING and MONITORING modes. During operation, the optimum mode is automatically swiched in accordance with temperature changes. The temperature can be set between 18°C and 30°C in 1 degC steps.

  • Page 23: Indoor Fan Control

    5-5. INDOOR FAN CONTROL 1. Fan speed ( Table 5 : Indoor Fan Speed ) AB*30LBAG AB*36LBAG Operation mode Air flow mode Speed (rpm) Operation mode Air flow mode Speed (rpm) Heating 1000 Heating 1100 S-Lo S-Lo Cooling 1100 Cooling 1000 S-Lo S-Lo...
  • Page 24 4. HEATING OPERATION When the airflow is set to [AUTO], the indoor fan ( Fig.6 : Airflow change - over ( Heating : AUTO ) ) motor operates [MED] mode. Indoor heat exchanger Then the indoor fan motor will run according temperature to a room temperature, as shown in Figure 6.

  • Page 25: Outdoor Fan Control

    5-6. OUTDOOR FAN CONTROL 1. Outdoor Fan Motor Following table shows the fan speed of the outdoor unit. ( Table 6 : Fan speed of the outdoor unit ) Cooling Heating AB*30LBAG 900/ 780/ 400/ 250/ 170 rpm 850/ 780/ 400/ 250/ 170 rpm AB*36LBAG Upper fan AB*45LBAG...

  • Page 26: Louver Control

    5-7. LOUVER CONTROL (Function Range) Each time the button is pressed, the air direction range will change as follows: (Fig.8 : Air Direction Range) (Operation Range) Cooling / Dry mode Heating mode Fan mode Use the air direction adjustments within the ranges shown above. The vertical airflow direction is set automatically as shown, in accordance with the type of operation selected.
  • Page 27 (Function Range) Each time the button is pressed, the air direction range will (Fig.9 : Air Direction Range) change as follows: (Operation Range) Cooling / Dry mode Heating mode Fan mode Use the air direction adjustments within the ranges shown above. The horizontal airflow direction is set automatically on after initialization.

  • Page 28: Compressor Control

    5-8. COMPRESSOR CONTROL 1. OPERATION FREQUENCY RANGE The operation frequency of the compressor is different based on the operation mode as shown in Table 7. (Table 7 : Compressor Operation Frequency Range) Cooling Heating AB*30LBAG 20Hz 90Hz 20Hz 95Hz 45Hz AB*36LBAG 20Hz 90Hz...

  • Page 29: Timer Operation Control

    5-9. TIMER OPERATION CONTROL 5-9-1 Wireless Remote Controller AR- JW1 ON / TIMER OFF / TIMER PROGRAM TIMER SLEEP TIMER 1. ON / OFF TIMER OFF timer : When the clock reaches the set time, the air conditioner will be turned off. Operation mode Stop mode Set time of timer...
  • Page 30 3. SLEEP TIMER If the sleep timer is set, the room temperature is monitored and the operation is stopped automatically. If the operation mode or the set temperature is change after the sleep timer is set, the operation is continued according to the changed setting of the sleep timer from that time ON. In the cooling operation mode When the sleep timer is set, the setting temperature is increased 1 degC.

  • Page 31: Electronic Expansion Valve Control

    5-10. ELECTRONIC EXPANSION VALVE CONTROL The most proper opening of the electronic expansion valve is calculated and controlled under the present operating condition based on the following values. The compressor frequency, the temperatures detected by the discharge temperature sensor and the outdoor temperature sensor. The pulse range of the electronic expansion valve control is between 50 to 480 pulses.

  • Page 32: Pump Down (Refrigerant Collecting Operation)

    5-15. PUMP DOWN ( Refrigerant collecting operation ) Perform the following procedures to collect the refrigerant when moving the indoor unit or the outdoor unit. When the product is stopped: 1. Press the PUMP DOWN switch (SW2) on the outdoor unit. (The LED on the outdoor unit circuit board flickers every 1second.) 2.
  • Page 33 3. Defrost Flow Chart The defrosting shall proceed by the integrating operation time and outdoor heat exchanger temperature as follows. Heating operation start : Compressor ON (Not defrosted for 6 or 10 minutes) AB*30/ 36LBAG AB*45LBAG Compressor integrating Compressor integrating operation: operation: 45 minutes and over...

  • Page 34: Manual Auto Operation

    5-18. MANUAL AUTO OPERATION If MANUAL AUTO Button is set, the operation is controlled as shown in Table 11. If the remote control is lost or battery power dissipated, this function will work without the remote control. (Table 11 : Manual auto operation ) OPERATION MODE Auto changeover FAN CONT.
  • Page 35 2. CURRENT RELEASE CONTROL The compressor frequency is controlled so that the outdoor unit input current does not exceeds the current limit value that was set up with the outdoor temperature. The compressor frequency returns to the designated frequency of the indoor unit at the time when the frequency becomes lower than the release value.
  • Page 36 3. ANTI-FREEZING CONTROL (Cooling mode) The compressor frequency decreases on cooling mode when the indoor heat exchanger temperature sensor detects the temperature lower than 3°C. Then, the anti-freezing control is released when it becomes higher than 6°C. (Fig.11 : Anti-freezing Protection Operation / Release Temperature) Indoor heat exchange temperature The compressor frequency is...

  • Page 37: Refrigerant Caution -R410A

    R410A Large Ceiling type INVERTER 6 . REFRIGERANT CAUTION -R410A-...

  • Page 38: R410A Tools

    6. REFRIGERANT CAUTION -R410A- 6-1. R410A TOOLS This air conditioner used R410A. TOOLS AND EQUIPMENT (R410A) For installation and servicing, it is necessary to prepare the tools and machines that are different from the previous Pressure control and Gas charging refrigerant.

  • Page 39: Precaution For Installation

    6-2. PRECAUTION FOR INSTALLATION Precaution for installation Pipe diameter, recommended material and wall thickness Nominal diameter 1/4" 3/8" 1/2" 5/8" 3/4" 7/8" 1" 1 1/8" 1 1/4" 1 3/8" 1 1/2" (in) Outside diameter 6.35 9.52 12.70 15.88 19.05 22.22 25.40 28.58 31.75 34.92...

  • Page 40: Refrigerant Charge

    Be careful not to mix moisture and contamination into the pipe Moisture contamination in the pipe is a cause of trouble. Air purge Always use a vacuum pump to purge air. Refrigerant charge Don't charge from the phase side. Do it always from the liquid phase side.

  • Page 41: Precaution For Servicing

    6-3. PRECAUTION FOR SERVICING Feature 1 Refrigerant oil is different from before. Precaution on Tools Refrigerant oil for Different point from New Refrigerant previous one Use the gauge manifold and charge hose Synthetic oil Absorbent character for New Refrigerant(HFC), which shall is high.

  • Page 42: New Refrigerant R410A

    6-4. NEW REFRIGERANT R410A What is HFC ? Phase-out schedule of HCFC according to Montreal protocol (HCFC consumption of 1989) + 100% = (CFC consumption of 1989) x 2.8% total abolition only service use started control 0.5% 1996 2000 2004 2010 2015 2020...
  • Page 43 Ozone Layer depleting mechanism sunbeam Ozone CFCl What is CFC and HCFC? CFC : Chloro-Fluoro-Carbon High ODP( ozone depletion potential ) chemical compound, including chlorine. (ODP:0.6-1.0) For example : R12 (for refrigerator and car air-conditioner) HCFC : Hydro-Chloro-Fluoro-Carbon Low ODP chemical compound, including chlorine and hydrogen. (ODP:0.02-01) For example : R22 (for air-conditioner) : Hydro-Fluoro-Carbon...
  • Page 44 Summary of R407C and R410A characteristics R410A R407C higher system similar pressure as R22 performance (possible to design Advantage Near-Azeotropic large equipment) refrigerant 1.6 times higher Zeotropic refrigerant pressure than R22 Disadvantage (handle with care) (difficult to design against pressure resistance) Large Air-Conditioners Suitable for Small Air-Conditioners...

  • Page 45: Defference From Conventional Model (R22) And Precautions

    6-5. DEFFERENCE FROM CONVENTIONAL MODEL (R22) AND PRECAUTIONS • Use new synthetic oils such as ester because HFC series refrigerant has less solubility with mineral oils conventionally used for R22. • As these new synthetic oils are easily influenced by moisture and dusts, they must be treated more care- fully than the conventional lubricating oils.

  • Page 46: Trouble Shooting

    R410A Large Ceiling type INVERTER 7 . TROUBLE SHOOTING...

  • Page 47: Error Display

    7. TROUBLESHOOTING 7-1 ERROR DISPLAY 7-1-1 INDOOR UNIT DISPLAY 1. ERROR DISPLAY Please refer the blinking pattern as follows. Vertical Trouble Operation Timer LED Swing LED shooting Error Contents (RED) (GREEN) (ORANGE) Continuous Continuous Indoor EEPROM abnormal (Model No.) blink blink Continuous Room temperature sensor open...

  • Page 48: Outdoor Unit Display

    7-1-2 OUTDOOR UNIT DISPLAY 1. ERROR DISPLAY Display Trouble LED Flashing Error contents priority shooting Pattern Outdoor communication signal error 1 time blink (Forward transfer signal error) blink Outdoor discharge pipe temperature sensor error 2 times blink Outdoor heat exchanger temperature sensor error 3 times blink Outdoor temperature sensor error...

  • Page 49: Trouble Shooting With Error Code

    7-2 TROUBLE SHOOTING WITH ERROR CODE Indicate or Display: Indicate or Display: Trouble shooting 2 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED: 5 times blink, Timer LED: Blink, Vertical swing LED: OFF Communication Error Outdoor Unit : No indication (Serial Reverse Transfer Error) Detective details: Detective Actuators:...
  • Page 50 Indicate or Display: Trouble shooting 3 Indoor Unit : Operation LED: 2 times blink, Timer LED: Blink, INDOOR UNIT Error Method: INDOOR UNIT Vertical swing LED: OFF / Blink Room Temperature Sensor Error Outdoor Unit : No indication Detective Actuators: Detective details: Indoor Unit Controller PCB Circuit When Room Temperature Thermistor open or short-circuit is...
  • Page 51 Indicate or Display: Trouble shooting 4 INDOOR UNIT Error Method: Indoor Unit : Operation LED: 3 times blink, Timer LED: Blink, INDOOR UNIT Vertical swing LED: OFF / Blink Indoor Heat Exchanger Temperature Outdoor Unit : No indication Sensor Error Detective Actuators: Detective details: When Heat Exchanger Temperature Thermistor open or short-circuit is...
  • Page 52 Indicate or Display: Trouble shooting 5 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED: Blink, Timer LED: 3 times blink, Vertical swing LED: OFF Outdoor Heat Exchanger Temperature Outdoor Unit : LED 3 times blink Sensor Error Detective Actuators: Detective details: Outdoor Unit Main PCB Circuit When Heat Exchanger Temperature Thermistor open or short-circuit is...
  • Page 53 Indicate or Display: Trouble shooting 6 Indoor Unit : Operation LED: Blink, Timer LED: 4 times blink, OUTDOOR UNIT Error Method: INDOOR UNIT Vertical swing LED: OFF Outdoor Temperature Sensor Error Outdoor Unit : LED 4 times blink Detective Actuators: Detective details: Outdoor Unit Main PCB Circuit When Outdoor Temperature Thermistor open or short-circuit is...
  • Page 54 Indicate or Display: Trouble shooting 7 Indoor Unit : Operation LED: Blink, Timer LED: 5 times blink, OUTDOOR UNIT Error Method: INDOOR UNIT Vertical swing LED: OFF Outdoor Discharge Pipe Temperature Outdoor Unit : LED 2 times blink Sensor Error Detective details: Detective Actuators: When Discharge Pipe Temperature Thermistor open or short-circuit...
  • Page 55 Trouble shooting 8 Indicate or Display: Indicate or Display: INDOOR UNIT Error Method: Indoor Unit : Operation LED: Blink, Timer LED: Blink, Vertical swing LED: OFF Indoor EEPROM abnormal Outdoor Unit : No indication (Model No.) Detective details: Detective Actuators: Indoor Unit Controller PCB circuit When the model information being read from EEPROM has an apparent error.
  • Page 56 Indicate or Display: Trouble shooting 9 Indoor Unit : Operation LED: 6 times blink, Timer LED: Blink, INDOOR UNIT Error Method: Vertical swing LED: OFF Indoor Fan Motor abnormal Outdoor Unit : No indication Detective Actuators: Detective details: Indoor Unit Controller PCB Circuit When the condition that actual frequency of Indoor Fan is Indoor Fan Motor below 1/3 of target frequency is continued more than 56 seconds.
  • Page 57 Indicate or Display: Trouble shooting 10 Indicate or Display: INDOOR UNIT Error Method: Indoor Unit : Operation LED: 5 times blink, Timer LED: Blink, Vertical swing LED: Blink Outdoor Communication Signal Error (Forward Transfer Signal Error) Outdoor Unit : LED 1 time blink Detective details: Detective Actuators: Indoor Unit Controller PCB Circuit...
  • Page 58 Indicate or Display: Trouble shooting 11 Indoor Unit : Operation LED: Blink, Timer LED: 8 times blink, OUTDOOR UNIT Error Method: Vertical swing LED: OFF Compressor Temperature Sensor Error Outdoor Unit : LED 7 times blink Detective Actuators: Detective details: When Compressor Temperature Thermistor open or short-circuit is Outdoor Unit Main PCB Circuit detected at power ON or while running the compressor.
  • Page 59 Indicate or Display: Trouble shooting 12 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED: Blink, Timer LED: 9 times blink, INDOOR UNIT Vertical swing LED: OFF Pressure Switch Error Outdoor Unit : LED 9 times blink Detective details: Detective Actuators: When pressure switch open is detected in 10 seconds Outdoor Unit Main PCB Circuit after the power is turned on.
  • Page 60 Indicate or Display: Trouble shooting 13 Indoor Unit : Operation LED: Blink, Timer LED: 10 times blink, OUTDOOR UNIT Error Method: Vertical swing LED: OFF IPM error (Permanent Stop) Outdoor Unit : LED 12 times blink Detective details: Detective Actuators: When more than normal operating current to IPM in Main PCB flows, Outdoor Unit Main PCB Circuit the compressor stops.
  • Page 61 Indicate or Display: Trouble shooting 14 Indoor Unit : Operation LED: Blink, Timer LED: 11 times blink, OUTDOOR UNIT Error Method: Vertical swing LED: OFF CT error Outdoor Unit : No indication Detective Actuators: Detective details: Outdoor Unit Main PCB Circuit When Input Current Sensor has detected lower than 0.5A Outdoor Unit Filter PCB Circuit while Inverter Compressor is operating at higher than 56Hz,...
  • Page 62 Indicate or Display: Trouble shooting 15 Indoor Unit : Operation LED: Blink, Timer LED: 12 times blink, OUTDOOR UNIT Error Method: INDOOR UNIT Vertical swing LED: OFF Active Filter Module (AFM) error Outdoor Unit : No indication Detective details: Detective Actuators: Outdoor Unit Main PCB Circuit When inverter input DC voltage is higher than 467V or Active Filter Module...
  • Page 63 Indicate or Display: Trouble shooting 16 Indicate or Display: OUTDOOR UNIT Error Method: Indoor Unit : Operation LED: Blink, Timer LED: 13 times blink, Vertical swing LED: OFF Compressor rotor location cannot detect Outdoor Unit : LED 13 times blink (Permanent Stop) Detective details: Detective Actuators:...
  • Page 64 Indicate or Display: Trouble shooting 17 Indoor Unit : Operation LED: Blink, Timer LED: 14 times blink, OUTDOOR UNIT Error Method: Vertical swing LED: OFF Outdoor Unit Fan Motor Error Outdoor Unit : LED 15 (Fan motor 1) / 16(Fan motor 2) times blink Detective details: Detective Actuators: When outdoor fan rotation speed is less than 100rpm in 20 seconds...
  • Page 65 Indicate or Display: Trouble shooting 18 Indoor Unit : No LED OUTDOOR UNIT Error Method: Outdoor Unit : LED 8 Times Blink Heat Sink Temperature Sensor Error Detective details: Detective Actuators: When Heat Sink Temperature Thermistor open or short-circuit is Outdoor Unit Main PCB Circuit detected at power ON or while running the compressor.
  • Page 66 Indicate or Display: Trouble shooting 19 OUTDOOR UNIT Error Method: Indoor Unit : No LED Compressor Start-up error Outdoor Unit : LED 14 Times Blink (Permanent Stop) Detective Actuators: Detective details: On start-up the compressor, when detected rotor position is out of phase Outdoor Unit Main PCB Circuit with actual rotor position more than 90 degrees,the compressor stops.

  • Page 67: Trouble Shooting With No Error Code

    7-3 TROUBLE SHOOTING WITH NO ERROR CODE Forecast of Cause: Trouble shooting 20 1. Power Supply failure 2. External cause Indoor Unit - No Power 3. Electrical Components defective Check Point 1 : Check Installation Condition Isn’t the breaker down? Check loose or removed connection cable.
  • Page 68 Forecast of Cause: Trouble shooting 21 1. Power Supply failure 2. External cause Outdoor Unit - No Power 3. Electrical Components defective Check Point 1 : Check Installation Condition Isn’t the breaker down? Check loose or removed connection cable. >>If abnormal condition is found, correct it by referring to Installation Manual or Data &...
  • Page 69 Forecast of Cause: Trouble shooting 22 1. Setting/ Connection failure 2. External cause No Operation (Power is ON) 3. Electrical Component defective Check Point 1 : Check indoor and outdoor installation condition Indoor Unit - Check incorrect wiring between Indoor Unit - Remote Control, or terminals between Indoor Units. Or, check if there is an open cable connection.
  • Page 70 Forecast of Cause: Trouble shooting 23 1. Indoor Unit error 2. Outdoor Unit error No Cooling / No Heating 3. Effect by Surrounding environment 4. Connection Pipe / Connection Wire failure 5. Refrigeration cycle failure Check Point 1 : Check Indoor Unit Does Indoor Unit FAN run on HIGH FAN? Is Air Filter dirty? Is Heat Exchanger clogged?
  • Page 71 Forecast of Cause : Trouble shooting 24 1. Abnormal installation (Indoor/ Outdoor) 2. Fan failure(Indoor/ Outdoor) Abnormal Noise 3. Compressor failure (Outdoor) Diagnosis method when Abnormal Noise is occurred Abnormal noise is coming from Indoor Unit. Abnormal noise is coming from Outdoor Unit. (Check and correct followings) (Check and correct followings) Is Main Unit installed in stable condition?

  • Page 72: Service Parts Information

    7-4 SERVICE PARTS INFORMATION SERVICE PARTS INFORMATION 1 Compressor Diagnosis method of Compressor ( If Outdoor Unit LED displays Error, refer to Trouble shooting ) Abnormal noise Stops soon after starting up Does not start up Check if vibration noise by Is there open or loose connection Is there open or loose connection loose bolt or contact noise...
  • Page 73 SERVICE PARTS INFORMATION 2 Inverter Compressor Check Point 1 : Check Connection Check terminal connection of Compressor Check connection of Main PCB (loose or incorrect wiring) (Loose or incorrect wiring) Terminal cover opened (RED) (RED) W304 MAIN PCB (TM304) W305 W303 (TM303) (TM305)
  • Page 74 SERVICE PARTS INFORMATION 3 Active Filter Module Check Point 1 : Check Open or Short-circuit and Diode (D1) Remove connector, check the open or short-circuit and the diode in the module Check the open or short-circuit Terminal Resistance value Tester(+) Tester(-) 360k 720k...
  • Page 75 SERVICE PARTS INFORMATION 4 Outdoor unit Electronic Expansion Valve ( EEV ) Check Point 1 : Check Connections Check connection of connector (CN27) ( Loose connector or open cable ) EXPANSION VALVE COIL BROWN BLUE CN27 ORANGE YELLOW WHITE Check Point 2 : Check Coil of EEV Check Point 3 : Check Voltage from Main PCB.
  • Page 76 SERVICE PARTS INFORMATION 5 Indoor Unit Fan Motor Check Point : Check each winding resistance of the motor If Resistance value is abnormal, replace motor. The connector Resistance value Thermal protector inserting numbers 115 125°C 22.8 31.9 at 20°C (AC) 07-30...

  • Page 77: Appending Data

    R410A Large Ceiling type INVERTER 8 . APPENDING DATA...

  • Page 78: Capacity Table

    8. APPENDING DATA 8-1. CAPACITY TABLE MODEL : AB*30/ 36LBAG / AO*30/ 36LMBWL COOLING 27.7 Indoor temperature 18 °CDB 21 °CDB 23 °CDB 26 °CDB 27 °CDB 29 °CDB 30 °CDB 32 °CDB 12 °CWB 15 °CWB 16 °CWB 18 °CWB 19 °CWB 21 °CWB 22 °CWB...

  • Page 79: Operation Range

    8-2. OPERATION RANGE MODEL : AB*30/ 36LBAG / AO*30/ 36LMBWL Operation Range Mode Indoor humidity Outdoor temperature Indoor temperature Cooling About 80% or less -10 to 43°C 18 to 32°C Heating 16 to 30°C -10 to 24°C MODEL : AB*45LBAG / AO*45LJBYL Operation Range Mode Indoor humidity Outdoor temperature...

  • Page 80: Electric Characteristics

    8-3. ELECTRIC CHARACTERISTICS Indoor unit AB 30LBAG AB 36LBAG Model Name AO 30LMBWL AO 36LMBWL Outdoor unit Voltage Power Supply Frequency Mode Cooling Heating Cooling Heating Rated Value Current 13.1 12.7 18.0 14.2 Input 3.00 2.90 4.12 3.26 Max Operating Current 15.2 15.3 18.3...

  • Page 81: Safety Device

    8-4. SAFETY DEVICE OUTDOOR UNIT PROTECTION FORM AO*30LMBWL AO*36LMBWL FUSE (SIDE OF POWER SUPPLY TERMINAL) 25A 250V 25A 250V FUSE (SIDE OF INDOOR UNIT) 10A 250V 10A 250V 3.15A 250V 3.15A 250V FUSE ON MAIN PCB 5A 250V 5A 250V FAN MOTOR PROTECTOR THERMAL PROTECTOR 150±5°C OFF...
  • Page 82 8-5. FUNCTION SETTING 8-5-1 INDOOR UNIT INDOOR UNIT Auto restart validity / invalidity DIP SW Room temperature correct coefficient Room temperature correct coefficient Forbidden Jumper Wire Remote control unit signal code SWITCH POSITION Indoor unit control circuit board 08-05...
  • Page 83 DIP SWITCH SETTING SW1-1. Auto restart setting Auto restart function can be selected by turning this switch ON/OFF. AUTO RESTART SETTING Factory setting) SW 1-1 SW state Invalidity Validity SW1-2, 1-3. Room temperature correct coefficient of heating. Decide the heating temperature correct coefficient vale of heating. TEMPERATURE CORRECTION Factory setting) SW state...

  • Page 84: Outdoor Unit (Ao*30/ 36Lmbwl)

    8-5-2 OUTDOOR UNIT ( AO*30/ 36LMBWL ) OUTDOOR UNIT Change current capacity DIP SW 1 No use (OFF) PUSH SW Pump down switch SWITCH POSITION Outdoor unit control circuit board DIP SW 1 PUSH SW 08-07...
  • Page 85 DIP SWITCH SETTING Current capacity setting DIP-SW1 CURRENT (MAX.) 18.0A 15.0A 13.5A 12.0A *1=36000BTU model's factory setting (AO*36LMBWL) *2=30000BTU model's factory setting (AO*30LMBWL) PUSH SWITCH SETTING SW2 setting Press the push-button switch, and "PUMP DOWN OPERATION" is starting. 08-08...

  • Page 86: Outdoor Unit (Ao*45Ljbyl)

    8-5-3 OUTDOOR UNIT ( AO*45LJBYL ) OUTDOOR UNIT Change current capacity DIP SW 1 No use (OFF) PUSH SW Pump down switch SWITCH POSITION Outdoor unit control circuit board DIP SW 1 PUSH SW 08-09...
  • Page 87 DIP SWITCH SETTING Current capacity setting DIP-SW1 CURRENT (MAX.) 23.5A 20.0A 18.0A 15.5A *1=54000BTU model's factory setting *2=45000BTU model's factory setting (AO*45LJBYL) PUSH SWITCH SETTING SW2 setting Press the push-button switch, and "PUMP DOWN OPERATION" is starting. 08-10...

  • Page 88: Installation Manual

    R410A Large Ceiling type INVERTER 9 . INSTALLATION MANUAL...
  • Page 89 STANDARD PARTS INSTALLATION PROCEDURE [For Half-Concealed Installation] [If using anchor bolts] 5. DRAIN PIPING CONNECTING THE PIPE Refrigerant • • • • • Suspension-bolt pitch should be as shown in the figure. (1) Drill holes for anchor bolts at the locations at which you will set the The following installation parts are furnished.
  • Page 90 REMOTE CONTROL UNIT • Remote control unit settings FINISHING TEST RUNNING (1) Press the START/STOP button and display only the clock. INSTALLATION • • • • • Perform test operation and check items 1 and 2 below. (1) Install the filter guide. CAUTION •...
  • Page 91 ELECTRICAL REQUIREMENT INSTALLATION PROCEDURE CONNECTING THE PIPE 2. BENDING PIPES (4) When the flare nut is tightened properly by your hand, use a torque SPLIT TYPE AIR CONDITIONER wrench to finally tighten it. The pipes are shaped by your hands. Be careful not to collapse them. •...
  • Page 92 ELECTRICAL WIRING 1. CONNECTION DIAGRAMS (2) Valve cover removal. (5) Power supply cord and connection cord should be fixed with cable • Remove the one mounting screw. clip as shown in the figure. • Remove the valve cover by sliding upward. Power supply Fill in a gap at the entrance of the cords with insulation (seal).
  • Page 93 R410A Large Ceiling type INVERTER 10 . REPLACEMENT PARTS...

  • Page 94: Replacement Parts ( For Outdoor Unit )

    1. REPLACEMENT PARTS (For OUTDOOR UNIT) 1-1 For AO*30/ 36LMBWL 1-1-1 PARTS LAYOUT DRAWING Active Filter Module Heat Exchanger Thermistor (Heat sink) Main PCB Fan motor Filter PCB 4-way valve Accumulator Solenoid Thermistor (Compressor temp.) Compressor Choke coil Thermistor (Discharge temp.) VIEW - A 10-01...
  • Page 95 Thermo Holder& Thermistor (Outdoor Temp.) Check valve Pressure SW Coil (Expansion valve)& Expansion valve 3-way valve (Liquid) Thermistor (Heat exchanger temp.) 3-way valve (Gas) 10-02...

  • Page 96: Wiring

    1-1-2 WIRING (For AO*30/ 36LMBWL) CLAMP & BIND Thermistor (Discharge temp.) wire Thermistor (Outdoor temp.) wire Thermistor (Compressor temp.) wire Thermistor (Heat exchanger temp.) wire Coil (Expansion valve) wire Pressure SW wire CLAMP (Compressor wire) CLAMP (Fan motor wire) CLAMP (Solenoid wire) BIND (Compressor wire...

  • Page 97: Disassembly Process

    1-1-3 DISASSEMBLY PROCESS (For AO*30/ 36LMBWL) 1. SERVICE PANEL removal Remove the 2 mounting screws. Remove the SERVICE PANEL by sliding downward. Replaceable Component Compressor Accumulator 4-way valve Solenoid Thermistor (Compressor temp.) Thermistor (Discharge temp.) Hook Thermistor (Outdoor temp.) (3 places) Thermistor (Heat exchanger temp.) Pressure SW Coil (Expansion valve)
  • Page 98 3. INVERTER BOX removal Remove the 4 mounting screws. Remove the connectors and cords. (Refer to VIEW -C,-D) Remove the INVERTER BOX upward. REAR VIEW FRONT VIEW Remove power supply & Remove the connectors Remove the connectors Connection cord. Terminal VIEW - C Choke coil VIEW - D...
  • Page 99 Remove the 1 mounting screw. Remove the INVERTER BOX COVER upward. INVERTER BOX COVER Hook (2 places) Remove the connector and cords. Twist W6 and W7 Twist W4 and W5 4 times or more. 2 times or more. CN1 (Black/Brown/Red) W7 (White) W5 (White) W4 (Black)
  • Page 100 Remove the connector and cords. Twist 4 times or more 2 turn the Wire this way " - " (Black) " L2 " (Brown) Thermistor (Heat sink) " + " (Red) " L1 " (White) CN407 " P " (Yellow) "...
  • Page 101 Remove the 6 mounting screws. Remove the INVERTER BOX A upward. INVERTER BOX A REAR VIEW LEFT SIDE VIEW Filter PCB Main PCB Remove the 2 mounting screws. Remove the 1 mounting screw. Remove the Filter PCB upward. Remove the Main PCB upward. Hook (3 places) Hook (2 places) Main PCB...

  • Page 102: Assembly Process Of Inverter Unit

    1-1-4 ASSEMBLY PROCESS of INVERTER UNIT (For AO*30/ 36LMBWL) 1. FILTER PCB As shown in Fig.1, assemble FILTER PCB to INVERTER BOX A. As shown in Fig.2, pull out the wires of FILTER PCB. Hook (2 places) Screw (2 places) INVERTER BOX A FILTER PCB Fig.1...
  • Page 103 As shown in Fig.4, pull out the wires. W16 (Red) W17 (Black) Thermistor (Heat sink) W303 (Black) W304 (White) W305 (Red) CN407 Fig. 4 As shown in Fig.5, pull out the wires and fix them. Hook (2 places) W12 (Yellow) W13 (Blue) W17 (Black) W16 (Red)
  • Page 104 As shown in Fig.6, pull out the wires. W200 (Red) Fig. 6 As shown in Fig.7, pull out the wires. W200 (Red) HYIC1 CN1 wire with connector Fig. 7 Don't come in contact with HYIC1. DETAIL - A 10-11...
  • Page 105 As shown in Fig.8, connect wires. CN34 (Yellow) CN1 (White) Fig. 8 As shown in Fig.9, connect wires. W21 (Orange) W22 (Orange) PTC Thermistor Through this hole. TM101 (Black line) TM102 (White line) Fig. 9 10-12...
  • Page 106 As shown in Fig.10, fix the wire to INVERTER BOX A. Pull out the wire Hook (3 places) Thermistor (Heat sink) through this opening CN407 Fig. 10 As shown in the figures, set wire with connector and bind it to INVERTER BOX A. Bind wire to INVERTER BOX A.

  • Page 107: For Ao*45Ljbyl

    1-2 For AO*45LJBYL 1-2-1 PARTS LAYOUT DRAWING Active Filter Module Thermistor (Heat sink) Heat Exchanger D,Power (Bridge) Main PCB Filter PCB Fan motor Choke coil 4-way valve Thermistor (Discharge temp.) Solenoid Accumulator Thermistor (Compressor temp.) Compressor 10-14...
  • Page 108 Thermo Holder& Thermistor (Outdoor Temp.) Pressure SW Check valve Coil (Expansion valve)& Expansion valve 3-way valve (Liquid) 3-way valve (Gas) Thermistor (Heat exchanger temp.) 10-15...

  • Page 109: Wiring

    1-2-2 WIRING (For AO*45LJBYL) CLAMP (Compressor wire) BIND Don't use this (Thermistor (Discharge temp.)) CABLE CLIP. (Thermistor (Compressor temp.)) (Thermistor (Heat exchanger temp.)) (Coil (Expansion valve)) CLAMP (Compressor wire) CLAMP & BIND Thermistor (Discharge temp.) wire Thermistor (Outdoor temp.) wire Thermistor (Compressor temp.) wire Thermistor (Heat exchanger temp.) wire Coil (Expansion valve) wire...
  • Page 110 Thermistor(Outdoor temp.) Coil (Expansion valve) CLAMP with U PIPE (Thermistor (Heat exchanger temp.)) (Coil (Expansion valve)) Thermistor (Heat exchanger temp.) ENLARGED DETAIL 10-17...

  • Page 111: Disassembly Process

    1-2-3 DISASSEMBLY PROCESS (AO*45LJBYL) 1. SERVICE PANEL removal Remove the 2 mounting screws. Remove the SERVICE PANEL by sliding downward. Hook (3 places) Replaceable Component Compressor Accumulator 4-way valve Solenoid Thermistor (Compressor temp.) Thermistor (Discharge temp.) Thermistor (Outdoor temp.) Thermistor (Heat exchanger temp.) Pressure SW Coil (Expansion valve) 10-18...
  • Page 112 2. TOP PANEL removal Remove the 7 mounting screws. Remove the TOP PANEL upward. FRONT VIEW REAR VIEW 10-19...
  • Page 113 3. INVERTER BOX removal Remove the 4 mounting screws. Remove the connectors and cords. (Refer to VIEW -C,-D) Remove the INVERTER BOX upward. REAR VIEW FRONT VIEW Remove power supply & Remove the connectors Remove the connectors Connection cord. Terminal VIEW - C Choke coil VIEW - D...
  • Page 114 Remove the 1 mounting screw. Remove the INVERTER BOX COVER upward. INVERTER BOX COVER Hook (2 places) Remove the connector and cords. Twist W6 and W7 2 times or more. W1 (Black) W6 (Black) W7 (White) W2 (White) W200 (Red) VIEW - E 10-21...
  • Page 115 Remove the connector and cords. " " (White) D,Power (Bridge) " " (Gray) " L2 " (Brown) " - " (Black) " L1 " (White) " + " (Red) Thermistor (Heat sink) CN407 BIND " P " (Yellow) " N1 " (Blue) "P"...
  • Page 116 Remove the 6 mounting screws. Remove the INVERTER BOX A upward. INVERTER BOX A REAR VIEW LEFT SIDE VIEW Filter PCB Main PCB Remove the 2 mounting screws. Remove the 1 mounting screw. Remove the Filter PCB upward. Remove the Main PCB upward. Hook (3 places) Hook (2 places) Main PCB...

  • Page 117: Assembly Process Of Inverter Unit

    1-2-4 ASSEMBLY PROCESS of INVERTER UNIT (For AO*45LJBYL) 1. FILTER PCB As shown in Fig.1, assemble FILTER PCB to INVERTER BOX A. As shown in Fig.2, pull out the wires of FILTER PCB. Hook (2 places) Screw (2 places) INVERTER BOX A FILTER PCB Fig.1 Fig.2...
  • Page 118 As shown in Fig.4, pull out the wires. Thermistor (Heat sink) CN407 W303 (Black) W304 (White) W305 (Red) Fig. 4 As shown in Fig.5, pull out the wires and fix them. W303 (Black) W304 (White) Hook (2 places) W305 (Red) W107 (White) W108 (Violet) CN407...
  • Page 119 As shown in Fig.6, pull out the wires. W200 (Red) CN1 wire with connector Fig. 6 HYIC1 Don't come in contact with HYIC1. VIEW - A As shown in Fig.7, connect wires. CN34 (Yellow) CN1 (White) Fig. 7 10-26...
  • Page 120 As shown in Fig.8, connect wires. W108 (Violet) W107 (White) Gray line Make White line on Black line Twist 5 times or more. Through this hole. TM101 (Black line) TM102 (White line) Fig. 8 10-27...
  • Page 121 As shown in Fig.9, fix the wire to INVERTER BOX A. Pull out the wire Hook (3 places) through this opening Thermistor (Heat sink) CN407 Fig. 9 As shown in the figures, set wire with connector and bind it to INVERTER BOX A. Bind wire to INVERTER BOX A.

  • Page 122: Replacement Parts ( For Indoor Unit )

    2. REPLACEMENT PARTS (For INDOOR UNIT) 2-1 PARTS LAYOUT DRAWING AIR FILTER INTAKE GRILLE Tapping screw SIDE COVER B (LEFT) SIDE COVER A (RIGHT) SIDE COVER B (RIGHT) 1. AIR FILTER removal Remove the 2 AIR FILTERS. INTAKE GRILLE ( 2 places ) AIR FILTER ( 2 places ) 10-29...
  • Page 123 2. INTAKE GRILLE removal Remove the 6 mounting screws. Remove the 2 INTAKE GRILLES. INTAKE GRILLE ( 2 places ) 10-30...
  • Page 124 3. SIDE COVER removal Remove the 2 mounting screws.(Left side and Right side) Remove the SIDE COVER A and B. SIDE COVER A (LEFT) Hook (2 places) SIDE COVER B (LEFT) Hook (3 places) 4. CONTROL BOX removal Remove the 2 mounting screws. Pull the CONTROL BOX downward.
  • Page 125 6. Wiring and Parts layout BIND BIND (Wire with connector (For Display)) (Wire with connector (For Display)) (Thermistor (Pipe temp.)) (Thermistor (Pipe temp.)) (Wire with connector (For Stepping motor)) (Thermistor (Room temp.)) Thermistor (Room temp.) BLACK WHITE Capacitor,Plastic CONTROLLER PCB Power Supply PCB BIND BIND...
  • Page 126 1116,Suenaga,Takatsu-ku,Kawasaki 213-8502,Japan May. 2006 Printed in Japan...

This manual is also suitable for:

Ab*36lbag seriesAo*45ljbyl seriesAb*45lbag seriesAo*30lmbwl seriesAo*36lmbwl series

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