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Fujitsu AB Series A18LATN Service Instruction

Large ceiling type inverter r410a
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SERVICE
INSTRUCTION
R410A
SPLIT TYPE
ROOM AIR CONDITIONER
Large Ceiling
INVERTER
Models Indoor unit Outdoor unit
AB*A18LATN
AB*A24LATN
AB*A36LATN
AB*A45LATN
type
AO*A18LACL
AO*A24LACL
AO*A36LATL
AO*A45LATL

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Summary of Contents for Fujitsu AB Series A18LATN

  • Page 1 SPLIT TYPE ROOM AIR CONDITIONER Large Ceiling type INVERTER SERVICE INSTRUCTION Models Indoor unit Outdoor unit AO*A18LACL AB*A18LATN AO*A24LACL AB*A24LATN AB*A36LATN AO*A36LATL AB*A45LATN AO*A45LATL R410A...
  • Page 2 R410A Large Ceiling type INVERTER 1 . SPECIFICATIONS...

  • Page 3: Specifications

    1. SPECIFICATIONS FLOOR CEILING MODEL Type INVERTER HEATPUMP Model name AB A18LATN AB A24LATN Power source 230V 50Hz Available voltage range 198-264V 50Hz Cooling European energy label Heating Rated BTU/h 17700 24200 Cooling 0.9-5.9 0.9-8.0 Min - Max BTU/h 3100-20100 3100-27300 Capacity Rated...
  • Page 4 CEILING MODEL Type INVERTER HEATPUMP Model name AB A36LATN AB A45LATN Power source 230V 50Hz Available voltage range 198-264V 50Hz Cooling European energy label Heating 10.0 12.5 Rated BTU/h 34100 42700 Cooling 3.8 - 11.2 4.0 - 14.0 Min.-Max. BTU/h 13000 - 38200 13700 - 47800 Capacity...
  • Page 5 FLOOR CEILING MODEL Type INVERTER HEATPUMP Model name ABTA18LATN ABTA24LATN Power source 240V 50Hz Available voltage range 198-264V 50Hz Cooling Energy label (Number of star mark) Heating Rated BTU/h 17700 24200 Cooling 0.9-5.9 0.9-8.0 Min.-Max. BTU/h 3100-20100 3100-27300 Capacity Rated BTU/h 20500 27300...
  • Page 6 CEILING MODEL Type INVERTER HEATPUMP Model name ABTA36LATN ABTA45LATN Power source 240V 50Hz Available voltage range 198-264V 50Hz Cooling Energy label (Number of star mark) Heating 10.0 12.5 Rated BTU/h 34100 42700 Cooling 3.8 - 11.2 4.0 - 14.0 Min.-Max. BTU/h 13000 - 38200 13700 - 47800...
  • Page 7 Type INVERTER HEATPUMP Model name AO A18LACL AO A24LACL Power source 230V 50Hz Available voltage range 198-264V 50Hz Starting currente 10.0 Cooling 2000 2470 Airflow rate Heating 1910 2470 Type × Q'ty Propeller × 1 Motor output Cooling Sound pressure level dB(A) Heating 546 ×...
  • Page 8 Type INVERTER HEATPUMP Model name AO A36LATL AO A45LATL Power source 230V 50Hz Available voltage range 198-264V 50Hz Starting current 15.0 15.0 Cooling 6600 6600 Airflow rate Heating 6600 6600 Type × Q'ty Propeller × 2 Motor output 103 × 2 103 ×...
  • Page 9 Type INVERTER HEATPUMP Model name AOTA18LACL AOTA24LACL Power source 240V 50Hz Available voltage range 198-264V 50Hz Starting currente 10.0 Cooling 2000 2470 Airflow rate Heating 1910 2470 Type × Q'ty Propeller × 1 Motor output Cooling Sound pressure level dB(A) Heating 546 ×...
  • Page 10 Type INVERTER HEATPUMP Model name AOTA36LATL AOTA45LATL Power source 240V 50Hz Available voltage range 198-264V 50Hz Starting current 15.0 15.0 Cooling 6600 6600 Airflow rate Heating 6600 6600 Type × Q'ty Propeller × 2 Motor output 103 × 2 103 × 2 Cooling Sound pressure level dB(A)
  • Page 11 R410A Large Ceiling type INVERTER 2 . DIMENSIONS...
  • Page 12 2. DIMENSIONS MODEL : AB*A18 / 24LATN (Unit : mm) Rear view Side view Bottom view Refrigerant piping flare connection (Gas) Refrigerant piping flare connection (Liquid) Drain piping connection Knock out hole for drain piping Knock out hole for refrigerant piping Hole for lifting bolt (Use M10 screw bolt) Wall bracket Side of set...
  • Page 13 MODEL : AB*A36 / 45LATN (Unit : mm) Top view Side view Rear view Suspension bolt pitch 1,600 Dimensions (Space Required for Installation) INDOOR UNIT (Top view) Suspension bolt should extend INDOOR UNIT outward 30 to 75. Refrigerant piping flare connection (Gas) Refrigerant piping flare connection (Liquid) Drain piping connection Knock out hole for fresh air...
  • Page 14 MODEL : ABTA18 / 24LATN (Unit : mm) Rear view Side view Bottom view Refrigerant piping flare connection (Gas) Refrigerant piping flare connection (Liquid) Drain piping connection Knock out hole for drain piping Knock out hole for refrigerant piping Hole for lifting bolt (Use M10 screw bolt) Wall bracket Side of set 100 hole...
  • Page 15 MODEL : ABTA36 / 45LATN (Unit : mm) Top view Side view Rear view Suspension bolt pitch 1,600 Dimensions (Space Required for Installation) INDOOR UNIT (Top view) Suspension bolt should extend INDOOR UNIT outward 30 to 75. Refrigerant piping flare connection (Gas) Refrigerant piping flare connection (Liquid) Drain piping connection Knock out hole for fresh air...
  • Page 16 MODELS : AO A18 / 24LACL (Unit : mm) Top view Front view AO A18L AO A24L Side view Air flow Bottom view 02 - 05...
  • Page 17 MODEL : AO A36 / 45LATL (Unit : mm) Top view Front view Side view Air flow Drain cap mounting 4-Ø12mm hole places Bottom view 02 - 06...
  • Page 18 MODELS : AOTA18 / 24LACL (Unit : mm) Top view Front view AOTA18L AOTA24L Side view Air flow Bottom view 02 - 07...
  • Page 19 MODEL : AOTA36 / 45LATL (Unit : mm) Top view Front view Side view Air flow Drain cap mounting 4-Ø12mm hole places Bottom view 02 - 08...

  • Page 20: Refrigerant System Diagram

    R410A Large Ceiling type INVERTER 3 . REFRIGERANT SYSTEM DIAGRAM...
  • Page 21 3. REFRIGERANT CIRCUIT MODEL : AB*A18 / 24LATN / AO*A18 / 24LACL 03-01...
  • Page 22 MODEL : AB*A36 / 45LATN / AO*A36 / 45LATL 03-02...
  • Page 23 MODEL : ABTA18 / 24LATN / AOTA18 / 24LACL 03-03...
  • Page 24 MODEL : ABTA36 / 45LATN / AOTA36 / 45LATL 03-04...
  • Page 25 R410A Large Ceiling type INVERTER 4 . CIRCUIT DIAGRAM...
  • Page 26 4. CIRCUIT DIAGRAM MODEL : AB*A18 / 24LATN 04-01...
  • Page 27 MODEL : AB*A36 / 45LATN 04-02...
  • Page 28 MODEL : ABTA18 / 24LATN 04-03...
  • Page 29 MODEL : ABTA36 / 45LATN 04-04...
  • Page 30 MODEL : AO*A18 / 24LACL 04-05...
  • Page 31 MODEL : AO*A36 / 45LATL 04-06...
  • Page 32 MODEL : AOTA18 / 24LACL 04-07...
  • Page 33 MODEL : AOTA36 / 45LATL 04-08...

  • Page 34: Control Operation

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

  • Page 35: Description Of Each Control Operation

    5. DESCRIPTION OF EACH CONTROL 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 °C higher than a set temperature, the compressor operation frequency will attain to maximum performance.

  • Page 36: 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 °C than a set temperature, the compressor operation frequency will attain to maximum performance.

  • Page 37: 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 Fig 3. ( Table 3 : Compressor frequency ) Operating frequency AB*A18LATN 34Hz...

  • Page 38: 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 °C steps.

  • Page 39: Indoor Fan Control

    5-5. INDOOR FAN CONTROL 1. Fan speed ( Table 5 : Indoor Fan Speed ) AB*A18LATN AB*A24LATN Operation mode Air flow mode Speed (rpm) Operation mode Air flow mode Speed (rpm) Cooling 1040 Cooling 1330 1150 1000 Heating 1040 Heating 1300 1000 1200...
  • Page 40 4. HEATING OPERATION Switch the airflow [AUTO], and the indoor fan motor will run according to a room temperature, as shown in Figure 7. On the other hand, if switched in [HIGH] [QU], the indoor motor will run at a constant airflow of [HEAT] operation modes QU, LOW, MED, HIGH, as shown in Table 5.

  • Page 41: Outdoor Fan Control

    5-6. OUTDOOR FAN CONTROL 1. Outdoor Fan Motor 1-1. For AB*A18/ 24LATN Following table shows the fan speed of the outdoor unit. Table 6 : Fan speed of the outdoor unit Outdoor temperature Cooling Over than 12°C 860/ 820/ 670/ 500 rpm 500 rpm AB*A18LATN Less than 12°C...
  • Page 42 1-2. For AB*A36/ 45LATN Following table shows the fan speed of the outdoor unit. Table 8 : Fan speed of the outdoor unit Cooling Heating Upper fan 850/ 780/ 520/ 400/ 350/ 300/ 280 rpm 850/ 780/ 350/ 200/ 170/ 150 rpm AB*A36LATN AB*A45LATN Lower fan...

  • Page 43: Louver Control

    5-7. LOUVER CONTROL (Function Range) Each time the button is pressed, the air direction range will change as follows: (Fig.9 : Air Direction Range) (Operation Range) During Cooling/Dry mode : During 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 44 (Function Range) Each time the button is pressed, the air direction range will change as follows: RIGHT/LEFT air direction louvers (Fig.10 : Air Direction Range) Use the air direction adjustments within the ranges shown above. The remote control unit's display does not change. 4.
  • Page 45 (Function Range) Each time the button is pressed, the air direction range will change as follows: (Fig.11 : Air Direction Range) (Operation Range) During Cooling/Dry mode : During Heating/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 46 (Function Range) Each time the button is pressed, the air direction range will change as follows: RIGHT/LEFT air direction louvers (Fig.12 : Air Direction Range) Use the air direction adjustments within the ranges shown above. The remote control unit's display does not change. 8.

  • Page 47: 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 9. (Table 9 : Compressor Operation Frequency Range) Cooling Heating AB*A18LATN 18Hz 113Hz 18Hz 120Hz 34Hz AB*A24LATN 18Hz 113Hz...

  • Page 48: Timer Operation Control

    5-9. TIMER OPERATION CONTROL 5-9-1 Wireless Remote Controller AR-SY1 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 49: Sleep Timer

    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 50: 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, the indoor heat exchanger sensor, the outdoor heat exchanger sensor, and the outdoor temperature sensor.

  • Page 51: Way Valve Extension Select

    5-13. 4-WAY VALVE EXTENSION SELECT At the time when the air conditioner is switched from the cooling mode to heating mode, the compressor is stopped, and the 4-way valve is switched in 3 minutes later after the compressor stopped. 5-14. AUTO RESTART When the power was interrupted by a power failure, etc.

  • Page 52: Compressor Preheating

    5-17. COMPRESSOR PREHEATING When the outdoor heat exchanger temperature is lower than 5°C and the heating operation has been stopped for 30 minutes, power is applied to the compressor and the compressor is heated. (By heating the compressor, warm air is quickly discharged when operation is started.) When operation was started, and when the outdoor temperature rises to 7°C or greater, preheating is ended.
  • Page 53 3. Defrost Flow Chart The defrosting shall proceed by the integrating operation time and outdoor heat exchanger emperature as follows. Heating operation start : Compressor ON (Not defrosted for 10 minutes) (In case of 1st defrost) (In case of 2nd and later defrost) Compressor integrating Compressor integrating Compressor integrating...

  • Page 54: Off Defrost Operation Control

    5-19. OFF DEFROST OPERATION CONTROL When operation stops in the [Heating operation] mode, if frost is adhered to the outdoor unit heat exchanger, the defrost operation will proceed automatically. In this time, if indoor unit operation lamp flashes slowly (7 sec ON / 2 sec OFF), the outdoor unit will allow the heat exchanger to defrost, and then stop.

  • Page 55: Economy Operation

    5-20. ECONOMY OPERATION At the maximum output, ECONOMY OPERATION is approximately 70% of normal air conditioner operation for cooling and heating. When ECONOMY OPERATION is performed during the cooling mode,dehumidification is improved. This function is especially convenient when you want to remove the humidity in the room without significantly lowering the room temperature.

  • Page 56: Various Protections

    5-21. VARIOUS PROTECTIONS 1. DISCHARGE GAS TEMPERATURE OVER RISE PREVENTION CONTROL 1-1. For AB*A 18/ 24LATN The discharge gas thermosensor (discharge thermistor : Outdoor side) will detect discharge gas temperature. When the discharge temperature becomes higher than 104°C, the compressor frequency is decreased 20 Hz, and it continues to decrease the frequency for 20 Hz every 120 seconds until the temperature becomes lower than 101°C.
  • Page 57 2-2. For AB*A36/ 45LATN (Table 13-2 : Current Release Operation Value / Release Value) [ Heating ] Outdoor unit fan speed (UP / LO) 850/ 780 rpm 200/ 200 rpm 780/ 780 rpm 170/ 170 rpm 350/ 350 rpm 150/ 150 rpm 13.0A / 12.5A 13.0A / 12.5A T0 >...

  • Page 58: Forced Cooling Operation

    4. COOLING PRESSURE OVER RISE PROTECTION On cooling mode, the compressor frequency is controlled as following based on the detection value of the outdoor heat exchanger temperature sensor. (Fig.17 : Cooling Pressure Over Rise Protection Control) Outdoor heat exchange temperature Compressor is OFF 67°C (AB*A18 / 24LATN)

  • Page 59: Cassette Type

    R410A CASSETTE type INVERTER 6 . REFRIGERANT CAUTION -R410A-...

  • Page 60: Refrigerant Caution -R410A

    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 61: 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 62: 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 63: 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 64: 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 65 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 66 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 67: 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 68 R410A Large Ceiling type INVERTER 7 . TROUBLE SHOOTING...

  • Page 69: Troubleshooting

    7. TROUBLESHOOTING 7-1 ERROR DISPLAY 7-1-1 WIRED REMOTE CONTROLLER DISPLAY 1. SELF - DIAGNOSIS When "EE" in Temperature Display is displayed, inspection of the air conditioning system is necessary. Please consult authoilzed servise personnel. Unit number (usually 0) Error code SU MO TU WE TH FR SA ex.
  • Page 70 2. ERROR CODE HISTORY DISPLAY Up to 16 memorized error codes may be displayed for the indoor unit connected to the remote controller. 1. Stop the air conditioner operation. 2. Press the SET TEMPERATURE buttons simultaneously for 3 seconds or more to start the self-diagnosis. Error code Error history number SU MO TU WE TH FR SA...

  • Page 71: Outdoor Unit Display

    7-1-2 OUTDOOR UNIT DISPLAY 1. ERROR DISPLAY 1-1. For AB*A18L/ 24L (AO*A18L/ 24L) Trouble Error contents LED Flashing Pattern shooting Discharge temperature error Continuously lighting IPM error 0.5sec ON / 0.5sec OFF CT error 2sec ON / 2sec OFF Compressor rotor location cannot detect 18,30 0.1sec ON / 2sec OFF Outdoor unit sensor error...

  • Page 72: Trouble Shooting With Error Code

    7-2 TROUBLE SHOOTING WITH ERROR CODE Trouble shooting 1 Indicate or Display: INDOOR UNIT Error Method: Outdoor Unit : No indication Communication Error ERROR CODE : E : 00 (Indoor unit Remote control) Detective details: Detective Actuators: When the indoor unit cannot receive the signal from Wired Remote Indoor unit controller PCB circuit more than 10seconds after power ON, or the indoor unit cannot receive Wired Remote Control...
  • Page 73 Indicate or Display: Indicate or Display: Trouble shooting 2 OUTDOOR UNIT Error Method: Outdoor Unit : No indication Communication Error ERROR CODE : E : 01 (Serial Reverse Transfer Error) Detective details: Detective Actuators: When the indoor unit cannot receive the serial signal from Outdoor unit Outdoor Unit Main PCB Circuit more than 10seconds, Active Filter Module...
  • Page 74 Indicate or Display: Trouble shooting 3 INDOOR UNIT Error Method: Outdoor Unit : No indication INDOOR UNIT ERROR CODE : E : 02 Room Temperature Sensor Error Detective details: Detective Actuators: Indoor Unit Controller PCB Circuit When Room Temperature Thermistor open or short-circuit is detected at power ON.
  • Page 75 Indicate or Display: Trouble shooting 4 INDOOR UNIT Error Method: Outdoor Unit : No indication INDOOR UNIT Indoor Heat Exchanger Temperature ERROR CODE : E : 04 Sensor Error Detective Actuators: Detective details: Indoor Unit Controller PCB Circuit When Heat Exchanger Temperature Thermistor open or short-circuit is detected at power ON.
  • Page 76 Indicate or Display: Trouble shooting 5 OUTDOOR UNIT Error Method: Outdoor Unit (AB*A18L/ 24L) : LED 0.1sec ON/ 0.1sec OFF (AB*A36L/ 45L) : LED 3 times blink Outdoor Heat Exchanger Temperature ERROR CODE : E : 06 Sensor (Outlet) Error Detective Actuators: Detective details: Outdoor Unit Main PCB Circuit...
  • Page 77 Indicate or Display: Trouble shooting 7 OUTDOOR UNIT Error Method: Outdoor Unit (AB*A18L/ 24L) : LED 0.1sec ON/ 0.1sec OFF INDOOR UNIT (AB*A36L/ 45L) : LED 4 times blink Outdoor Temperature Sensor Error ERROR CODE : E : 0A Detective Actuators: Detective details: Outdoor Unit Main PCB Circuit When Outdoor Temperature Thermistor open or short-circuit is...
  • Page 78 Indicate or Display: Trouble shooting 8 OUTDOOR UNIT Error Method: Outdoor Unit (AB*A18L/ 24L) : LED 0.1sec ON/ 0.1sec OFF INDOOR UNIT (AB*A36L/ 45L) : LED 2 times blink Outdoor Discharge Pipe Temperature Sensor Error ERROR CODE : E : 0C Detective details: Detective Actuators: When Discharge Pipe Temperature Thermistor open or short-circuit...
  • Page 79 Indicate or Display: Trouble shooting 9 OUTDOOR UNIT Error Method: Outdoor Unit (AB*A18L/ 24L) : LED continuously lighting INDOOR UNIT (AB*A36L/ 45L) : LED 6 times blink Discharge temperature error ERROR CODE : E : 0F Detective details: Detective Actuators: When the discharge temperature becomes higher than 110°C Outdoor Unit Main PCB Circuit ( AB*A36L and 45L is 115°C ), the compressor stops.
  • Page 80 Trouble shooting 10 Indicate or Display: Indicate or Display: INDOOR UNIT Error Method: Outdoor Unit : No indication Indoor EEPROM abnormal ERROR CODE : E : 11 (Model No.) Detective details: Detective Actuators: Indoor Unit Controller PCB circuit When the model information being read from EEPROM has an apparent error.
  • Page 81 Indicate or Display: Trouble shooting 11 INDOOR UNIT Error Method: Outdoor Unit : No indication Indoor Fan Motor abnormal ERROR CODE : E : 12 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 82 Indicate or Display: Trouble shooting 12 Indicate or Display: INDOOR UNIT Error Method: Outdoor Unit (AB*A18L/ 24L) : No indication (AB*A36L/ 45L) : LED 4 times blink Outdoor Communication Signal Error (Forward Transfer Signal Error) ERROR CODE : E : 13 Detective details: Detective Actuators: Indoor Unit Controller PCB Circuit...
  • Page 83 Indicate or Display: Trouble shooting 13 Outdoor Unit (AB*A18L/ 24L) : LED 0.1sec ON/ 0.1sec OFF OUTDOOR UNIT Error Method: (AB*A36L/ 45L) : LED 7 times blink Compressor Temperature Sensor Error ERROR CODE : E : 15 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 84 ( For AB*A36L/ 45L ) Indicate or Display: Trouble shooting 14 OUTDOOR UNIT Error Method: Outdoor Unit : LED 9 times blink INDOOR UNIT ERROR CODE : E : 16 Pressure Switch Error Detective details: Detective Actuators: Outdoor Unit Main PCB Circuit When pressure switch open is detected in 10 seconds after the power is turned on.
  • Page 85 Indicate or Display: Trouble shooting 15 Outdoor Unit (AB*A18L/ 24L) : LED 0.5sec ON/ 0.5sec OFF OUTDOOR UNIT Error Method: (AB*A36L/ 45L) : LED 12 times blink IPM error (Permanent Stop) ERROR CODE : E : 17 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 86 Indicate or Display: Trouble shooting 16 Outdoor Unit (AB*A18L/ 24L) : LED 2sec ON/ 2sec OFF OUTDOOR UNIT Error Method: (AB*A36L/ 45L) : No indication CT error ERROR CODE : E : 18 Detective details: Detective Actuators: When Input Current Sensor has detected 0A, while Inverter Compressor is Outdoor Unit Main PCB Circuit operating at higher than 56Hz(for AB*A18L/ 24L) or 50Hz(for AB*A36L/ 45L), Outdoor Unit Filter PCB Circuit...
  • Page 87 ( For AB*A36L/ 45L ) Indicate or Display: Trouble shooting 17 OUTDOOR UNIT Error Method: Outdoor Unit : No indication INDOOR UNIT ERROR CODE : E : 19 Active Filter Module (AFM) error Detective details: Detective Actuators: Outdoor Unit Main PCB Circuit When inverter input DC voltage is higher than 467V or Active Filter Module lower than 237V.
  • Page 88 Trouble shooting 18 Indicate or Display: OUTDOOR UNIT Error Method: Outdoor Unit (AB*A18L/ 24L) : LED 0.1sec ON/ 2sec OFF (AB*A36L/ 45L) : LED 13 times blink Compressor rotor location cannot detect (Permanent Stop) ERROR CODE : E : 1A Detective details: Detective Actuators: While running the compressor, if the detected rotor location is out of...
  • Page 89 Indicate or Display: Trouble shooting 19 OUTDOOR UNIT Error Method: Outdoor Unit (AB*A12L/ 24L) : LED 5sec ON/ 5sec OFF (AB*A36L/ 45L) : LED 15 times blink (Upper fan) Outdoor Unit Fan Motor Error LED 16 times blink (Lower fan) ERROR CODE : E : 1b Detective Actuators: Detective details:...
  • Page 90 Indicate or Display: Trouble shooting 20 OUTDOOR UNIT Error Method: Outdoor Unit : No indication INDOOR UNIT Outdoor unit computer ERROR CODE : E : 1c communication error Detective Actuators: Detective details: Outdoor Unit Main PCB Circuit When it cannot receive an effective signal for 10sec between the Main CPU and Sub CPU in outdoor unit.
  • Page 91 Indicate or Display: Trouble shooting 22 OUTDOOR UNIT Error Method: Outdoor Unit : No indication Excessive high pressure protection ERROR CODE : E : 24 on cooling Detective details: Detective Actuators: Excessive high pressure protection on cooling mode has been Outdoor Unit Main PCB Circuit activated.
  • Page 92 ( For AB*A18L/ 24L ) Indicate or Display: Trouble shooting 23 OUTDOOR UNIT Error Method: Outdoor Unit : No indication INDOOR UNIT ERROR CODE : E : 25 PFC circuit error Detective Actuators: Detective details: When inverter output DC voltage is higher than 415V for over 3 seconds, Outdoor Unit Main PCB Circuit the compressor stops.
  • Page 93 Indicate or Display: Indicate or Display: Trouble shooting 24 OUTDOOR UNIT Error Method: Outdoor Unit : No indication Communication Error ERROR CODE : E : 26 (Main PCB ---> Display PCB) Detective details: Detective Actuators: When the Display PCB cannot receive the signal from the Main PCB. Indoor Unit Main PCB Circuit Display PCB Forecast of Cause:...
  • Page 94 Indicate or Display: Indicate or Display: Trouble shooting 25 OUTDOOR UNIT Error Method: Outdoor Unit : No indication Communication Error ERROR CODE : E : 27 (Main PCB <--- Display PCB) Detective details: Detective Actuators: When the Main PCB cannot receive the signal from the Display PCB. Indoor Unit Main PCB Circuit Display PCB Forecast of Cause:...
  • Page 95 Indicate or Display: Trouble shooting 26 OUTDOOR UNIT Error Method: Outdoor Unit (AB*A18L/ 24L) : LED 0.1sec ON/ 0.1sec OFF (AB*A36L/ 45L) : LED 5 times blink Outdoor Heat Exchanger Temperature ERROR CODE : E : 29 Sensor (Middle) Error Detective Actuators: Detective details: Outdoor Unit Main PCB Circuit...
  • Page 96 Indicate or Display: Trouble shooting 27 OUTDOOR UNIT Error Method: Outdoor Unit (AB*A18L/ 24L) : LED 2sec ON/ 5sec OFF INDOOR UNIT (AB*A36L/ 45L) : LED 10 times blink Compressor temperature error ERROR CODE : E : 2b Detective details: Detective Actuators: When the compressor temperature becomes higher than 110°C, Outdoor Unit Main PCB Circuit...
  • Page 97 Indicate or Display: Trouble shooting 28 INDOOR UNIT Error Method: Outdoor Unit : No indication ERROR CODE : E : 2c 4-way valve error Detective Actuators: Detective details: When the indoor heat exchanger temperature is compared with Indoor Unit Controller PCB Circuit the room temperature, and either following condition is detected Heat Exchanger Temperature Thermistor continuously two times, the compressor stops.
  • Page 98 ( For AB*A36L/ 45L ) Indicate or Display: Trouble shooting 29 OUTDOOR UNIT Error Method: Outdoor Unit : LED 8 times blink Heat Sink Temperature Sensor Error ERROR CODE : No indication Detective Actuators: Detective details: Outdoor Unit Main PCB Circuit When Heat Sink Temperature Thermistor open or Heat Sink Temperature Thermistor short-circuit is detected at power ON or while running the compressor.
  • Page 99 Indicate or Display: Trouble shooting 30 OUTDOOR UNIT Error Method: Outdoor Unit (AB*A18L/ 24L) : LED 0.1sec ON/ 2sec OFF (AB*A36L/ 45L) : LED 14 times blink Compressor Start-up error (Permanent Stop) ERROR CODE : E : 1A Detective Actuators: Detective details: On start-up the compressor, when detected rotor position is out of phase Outdoor Unit Main PCB Circuit...

  • Page 100: Trouble Shooting With No Error Code

    7-3 TROUBLE SHOOTING WITH NO ERROR CODE Forecast of Cause: Trouble shooting 31 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 101 Forecast of Cause: Trouble shooting 32 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 102 Forecast of Cause: Trouble shooting 33 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 103 Forecast of Cause: Trouble shooting 34 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 104 Forecast of Cause : Trouble shooting 35 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 105: 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 106 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) MAIN PCB W304 AB*A36L/ 45L W305 W303 (WHITE)
  • Page 107 ( For AB*A36L/ 45L ) 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(+)
  • Page 108 SERVICE PARTS INFORMATION 4 Outdoor unit Electronic Expansion Valve ( EEV ) Check Point 1 : Check Connections Check connection of connector (CN27 or CN40) ( Loose connector or open cable ) EXPANSION VALVE COIL BROWN CN27 BLUE ORANGE CN40 CN40 YELLOW WHITE...
  • Page 109 R410A Large Ceiling type INVERTER 8 . APPENDING DATA...

  • Page 110: Appending Data

    8. APPENDING DATA 8-1. CAPACITY TABLE COOLING CAPACITY MODEL : AB A18L 13.3 Indoor temperature °CDB °CWB °CDB 4.35 3.28 0.39 4.84 3.30 0.40 5.01 3.59 0.40 5.34 3.60 0.40 5.50 3.89 0.40 5.83 3.88 0.41 6.17 4.13 0.41 4.26 3.24 0.46 4.74...

  • Page 111: Heating Capacity

    HEATING CAPACITY MODEL : AB A18L 13.3 Indoor temperature °CDB °CDB °CWB 5.25 2.15 5.13 2.20 5.00 2.24 4.88 2.29 4.75 2.33 5.90 2.27 5.76 2.32 5.62 2.37 5.48 2.42 5.34 2.46 6.57 2.40 6.41 2.45 6.26 2.50 6.10 2.55 5.94 2.60 7.46...
  • Page 112 COOLING CAPACITY MODEL : AB A36L 31.7 Indoor temperature °CDB °CWB °CDB 8.89 6.38 1.15 9.90 6.42 1.17 10.24 6.97 1.18 10.91 7.00 1.19 11.25 7.56 1.19 11.93 7.53 1.20 12.60 8.02 1.22 8.59 6.25 1.39 9.56 6.29 1.41 9.89 6.84 1.42 10.54 6.86 1.43 10.87 7.41...
  • Page 113 HEATING CAPACITY MODEL : AB A36L 31.7 Indoor temperature °CDB °CDB °CWB 10.11 3.65 9.87 3.72 9.63 3.80 9.39 3.87 9.15 3.95 10.88 3.68 10.62 3.75 10.36 3.83 10.10 3.90 9.84 3.98 11.57 3.63 11.29 3.71 11.02 3.78 10.74 3.86 10.47 3.93 12.48...
  • Page 114 COOLING CAPACITY MODEL : ABTA18L AF R 13.3 Indoor temperature 4.35 3.28 0.39 4.84 3.30 0.40 5.01 3.59 0.40 5.34 3.60 0.40 5.50 3.89 0.40 5.83 3.88 0.41 6.17 4.13 0.41 4.26 3.24 0.46 4.74 3.26 0.46 4.90 3.54 0.47 5.23 3.56 0.47...
  • Page 115 HEATING CAPACITY MODEL : ABTA18L 13.3 Indoor temperature °CDB °CDB °CWB 5.25 2.15 5.13 2.20 5.00 2.24 4.88 2.29 4.75 2.33 5.90 2.27 5.76 2.32 5.62 2.37 5.48 2.42 5.34 2.46 6.57 2.40 6.41 2.45 6.26 2.50 6.10 2.55 5.94 2.60 7.46 2.57...
  • Page 116 COOLING CAPACITY MODEL : ABTA36L 31.7 Indoor temperature °CDB °CWB °CDB 8.89 6.38 1.15 9.90 6.42 1.17 10.24 6.97 1.18 10.91 7.00 1.19 11.25 7.56 1.19 11.93 7.53 1.20 12.60 8.02 1.22 8.59 6.25 1.39 9.56 6.29 1.41 9.89 6.84 1.42 10.54 6.86 1.43 10.87 7.41 1.44 11.52 7.38...
  • Page 117 HEATING CAPACITY MODEL : ABTA36L 31.7 Indoor temperature °CDB °CWB °CDB 8.89 6.38 1.15 9.90 6.42 1.17 10.24 6.97 1.18 10.91 7.00 1.19 11.25 7.56 1.19 11.93 7.53 1.20 12.60 8.02 1.22 8.59 6.25 1.39 9.56 6.29 1.41 9.89 6.84 1.42 10.54 6.86 1.43 10.87 7.41 1.44 11.52 7.38...

  • Page 118: Operation Range

    8-2. OPERATION RANGE MODEL : AB*A18 / 24LATN / AO*A18 / 24LACL Operation Range Mode Indoor humidity Outdoor temperature Indoor temperature Cooling About 80% or less -10 to 46°C 18 to 32°C Heating -15 to 24°C About 30°C or less MODEL : AB*A36 / 45LATN / AO*A36 / 45LATL Operation Range Mode...

  • Page 119: Electric Characteristics

    8-3. ELECTRIC CHARACTERISTICS Model Name AB A18L AB A24L Voltage Power Supply Frequency Max Operating Current Circuit breaker *1)Wiring Spec. Connection Cable 1.5 - 2.5 1.5 - 2.5 Limited wiring length Model Name AO A18L AO A24L Voltage Power Supply Frequency Max Operating Current 15.0...
  • Page 120 Model name ABTA18L ABTA24L Voltage Power supply Frequency Max. operating current (Indoor unit) Connection cable 1.5 - 2.5 1.5 - 2.5 Wiring spec. (Indoor unit to outdoor unit) Limited wiring length Model Name AOTA18L AOTA24L Voltage Power Supply Frequency Max Operating Current 15.0 16.2 Starting Current...

  • Page 121: Safety Device

    8-4. SAFETY DEVICE OUTDOOR UNIT Model Protection form AO A18L AO A24L 20A 250V Current fuse (NEAR THE TERMINAL) 5A 250V Circuit protection 15A 250V Current fuse (MAIN PRINTD CIRCUIT BOARD) 3.15A 250V OFF:100 °C OFF:110 °C Fan motor protection Thermal protection program ON:95 °C...
  • Page 122 8-5. FUNCTION SETTING 8-5-1 INDOOR UNIT Follow the instructions in the Local Setup Procedure, which is supplied with the remote control, in accordance with the installed condition. After the power is turned on, perform the Function Setting on the remote control. The settings may be selected between the following two: Function Number or Setting Value.
  • Page 123 1-5. Setting the Heater Room Temperature Correction Depending on the installed environment, the room temperature sensor may require a correction. The settings may be changed as shown in the table below. Factory setting) Setting Description Function Number Setting Value Standard Lower control Slightly warmer control Warmer control...
  • Page 124 8-5-3 Procedures to change the Function Setting This procedure changes the function settings used to control the indoor unit according to the installation conditions. Incorrect settings can cause the indoor unit to malfunction. This procedure should be performed by authorized installation or service personnel only. Perform the "FUNCTION SETTING"...

  • Page 125: Wired Remote Controller

    8-5-4 WIRED REMOTE CONTROLLER Wired remote controller Can be used. ( Do not change.) Dual remote controller setting Filter reset operation and filter display ( Duct model is nonfunctional.) DIP SW Can be used. ( Do not change.) Can be used. ( Do not change.) Memory backup setting SWITCH POSITION Wired remote controller...
  • Page 126 R410A Large Ceiling type INVERTER 9 . INSTALLATION MANUAL...
  • Page 127 For authorized service personnel only. INSTALLATION PROCEDURE Floor Console/Under Ceiling Dual Type When installing set to wall install the accessory wall bracket at the posi- B. UNDER CEILING TYPE 3. INSTALLING BRACKETS WARNING Install the room air conditioner as follows: tion as shown in the figure, and mount the set to it.
  • Page 128 ELECTRICAL WIRING 1. CONNECTION DIAGRAMS INDOOR UNIT SIDE (3) Remove the electric component box cover. MOUNT THE COVER PLATE 3. MOUNT THE INTAKE GRILLE Wired remote controller (option) (1) Remove the electric component box. AND THE INTAKE GRILLE (1) Cut the right side of the intake grille. This is only when the pipe exits from the right side.

  • Page 129: Ceiling Type

    Ceiling Type INSTALLATION PROCEDURE STANDARD PARTS [For Half-Concealed Installation] CONNECTING THE PIPE 4. INSTALLING THE INDOOR UNIT Drain pipe Suspension-bolt pitch should be as shown in the figure. (1) Lift unit so that suspension bolts pass through the suspension fittings The following installation parts are furnished.
  • Page 130 FUNCTION SETTING Setting Other Functions Setting record Troubleshooting FRESH-AIR INTAKE SPECIAL INSTALLATION CUSTOMER GUIDANCE [Troubleshooting at the remote control LCD] Record any changes to the settings in the following table. This is possible only on the wired remote control. METHODS The following settings are also possible, depending on the operating (Troubleshooting with the indoor display) conditions.
  • Page 131 1116,Suenaga,Takatsu-ku,Kawasaki 213-8502,Japan June. 2007 Printed in Japan...

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