Fujitsu ASU 9RLF1 Service Instruction
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Fujitsu ASU 9RLF1 Service Instruction

Fujitsu ASU 9RLF1 Service Instruction

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See also: Service Manual , Technical Manual
SERVICE
INSTRUCTION
R410A
SPLIT TYPE
ROOM AIR CONDITIONER

WALL MOUNTED

INVERTER
Models
Indoor unit
ASU 9RLF1
ASU12RLF1
type
Outdoor unit
AOU 9RLFW1
AOU12RLFW1

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Summary of Contents for Fujitsu ASU 9RLF1

  • Page 1: Wall Mounted

    SPLIT TYPE ROOM AIR CONDITIONER WALL MOUNTED type INVERTER SERVICE INSTRUCTION Models Indoor unit Outdoor unit AOU 9RLFW1 ASU 9RLF1 AOU12RLFW1 ASU12RLF1 R410A...

  • Page 2: Table Of Contents

    CONTENTS 1. DESCRIPTION OF EACH CONTROL OPERATION 1. COOLING OPERATION....................01-01 2. HEATING OPERATION....................01-02 3. DRY OPERATION......................01-02 4. AUTO CHANGEOVER OPERATION................01-03 5. INDOOR FAN CONTROL....................01-04 6. OUTDOOR FAN CONTROL..................01-06 7. LOUVER CONTROL..................... 01-07 8. COMPRESSOR CONTROL..................01-08 9.

  • Page 3: Description Of Each Control Operation

    R410A WALL MOUNTED type INVERTER 1 . DESCRIPTION OF EACH CONTROL OPERATION...

  • Page 4: Cooling Operation

    1. COOLING OPERATION 1-1 COOLING CAPACITY CONTROL A sensor (room temperature thermistor) built in the indoor unit body 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 4°F(2°C) higher than a set temperature, the compressor operation frequency will attain to maximum performance.

  • Page 5: Heating Operation

    2. HEATING OPERATION 2-1 HEATING CAPACITY CONTROL A sensor (room temperature thermistor) built in the indoor unit body 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 by 6°F(3°C) than a set temperature, the compressor operation frequency will attain to maximum performance.

  • Page 6: Auto Changeover Operation

    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, DRY and MONITORING modes. During operation, the optimum mode is automatically switched in accordance with temperature changes. The temperature can be set between 64°F(18°C) and 88°F(30°C) in 2°F(1°C) steps.

  • Page 7: Indoor Fan Control

    5. INDOOR FAN CONTROL 1. Fan speed ( Table 4 : Indoor Fan Speed ) Speed (rpm) Operation mode Air flow mode ASU9RLF1 ASU12RLF1 Poweful 1380 Heating 1320 1280 1160 Quiet Cool air prevention S-Lo Cooling/ Fan Poweful 1380 1320 1160 Quiet *Soft Quiet...
  • Page 8 5. HEATING OPERATION Switch the airflow [AUTO], and the indoor fan motor will run according to a room temperature, as shown in Fig. 4. On the other hand, if switched in [HIGH] [QUIET], the indoor motor will run at a constant airflow of [HEAT] operation modes QUIET, LOW, MED, HIGH, as shown in Table 4.

  • Page 9: Outdoor Fan Control

    6. OUTDOOR FAN CONTROL 1. Outdoor Fan Motor The Table 6 shows the type of the outdoor fan motor. The control method is different between AC motor and DC motor. ( Table 6 : Type of Motor ) AC Motor DC Motor AOU9/ 12RLFW1 2.

  • Page 10: Louver Control

    7. LOUVER CONTROL 1. VERTICAL LOUVER CONTROL (Function Range) Each time the button is pressed, the air direction range will change as follow: Fig. 8 : Air Direction Range The Remote Controller's display does not change. If you set the angle to position 4.7 for more than 30 minutes in COOL or DRY mode, they automatically return to position 3.

  • Page 11: Compressor Control

    8. COMPRESSOR CONTROL 1. OPEARTION FREQUENCY RANGE The operation frequency of the compressor is different based on the operation mode as shown in the Table 10. (Table 10 : Compressor Operation Frequency Range) Cooling Heating AOU9RLFW1 22rps 79rps 22rps 99rps 28rps 37rps AOU12RLFW1...

  • Page 12: Timer Operation Control

    9. TIMER OPEARTION CONTROL The Table 12 shows the available timer setting based on the product model. (Table 12 : Timer Setting) ON TIMER / OFF TIMER PROGRAM TIMER SLEEP TIMER ASU9/ 12RLF1 1. OPEARTION FREQUENCY RANGE 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 13 3. SLEEP TIMER If the sleep 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 2°F(1°C).
  • Page 14 9-2 WIRED REMOTE CONTROLLER (OPTION) The Table 13 shows the available timer setting based on the product model. ( Table 13 : Timer Setting ) ON TIMER / OFF TIMER WEEKLY TIMER TEMPERATURE SET BACK TIMER ASU9/ 12RLF1 ON TIMER / OFF TIMER Same to 9-1 1.ON TIMER / OFF TIMER and shown in those.

  • Page 15: Electronic Expansion Valve Control

    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 Table 14. The compressor frequency, the detected temperature by the discharge temperature sensor, the indoor heat exchanger sensor, the outdoor heat exchanger sensor, and the outdoor temperature sensor. ( Table 14 : The pulse range of the electronic expansion valve control ) Operation mode Pulse range...

  • Page 16: Auto Restart

    14. AUTO RESTART When the power was interrupted by a power failure, etc. during operation, the operation contents at that time are memorized and when power is recovered, operation is automatically started with the memorized operation contents. When the power is interrupted and recovered during timer operation, since the timer operation time is shifted by the time the power was interrupted, an alarm is given by blinking (7 sec ON/2 sec OFF) the indoor unit body timer lamp.

  • Page 17: Compressor Preheating

    17. COMPRESSOR PREHEATING When the outdoor heat exchanger temperature is lower than 41°F(5°C) and the all 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 heat exchanger temperature rises to 44.6°F(7°C) or greater, preheating is ended.

  • Page 18: Defrost Operation Control

    21. DEFROST OPERATION CONTROL 1. CONDITION OF STARTING THE DEFROST OPERATION The defrost operation starts as shown in the following Table 20. (Table 20 : Condition of starting Defrost Operation) Compressor integrating operation time Normal defrost Less than 25 minutes More than 25 minutes Outdoor heat exchanger temp.
  • Page 19 3. Defrost Flow Chart The defrosting shall proceed by the integrating operation time, outdoor temperature and outdoor heat exchanger temperature as follows. Heating operation start : Compressor ON (Not defrosted for 10 minutes) Normal defrost Integrating defrost -4°F (-20°C)< Outside air temp. Intermittent operation Continuous operation Outside air temp.

  • Page 20: Off Defrost Operation Control

    22. OFF DEFROST OPEARTION 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 21: Various Protections

    23. VARIOUS PROTECTIONS 1. DISCHARGE GAS TEMPERATURE OVERRISE PREVENSION CONTROL The discharge gas thermosensor (discharge thermistor : Outdoor side) will detect discharge gas temperature. When the discharge temperature becomes higher than Temperature , the compressor frequency is decreased 20rps, and it continues to decrease the frequency for 20rps every 120 seconds until the temperature becomes lower than Temperature .
  • Page 22 3. ANTIFREEZING CONTROL (Cooling and Dry mode) The compressor frequency is decrease on cooling & dry mode when the indoor heat exchanger temperature sensor detects the temperature lower than Temperature . Then, the anti-freezing control is released when it becomes higher than Temperature . (Table 24 : Anti-freezing Protection Operation / Release Temperature) Outdoor temperature Temperature...

  • Page 23: Trouble Shooting

    R410A WALL MOUNTED type INVERTER 2 . TROUBLE SHOOTING...

  • Page 24: Error Display

    2. TROUBLESHOOTING 2-1 ERROR DISPLAY 2-1-1 INDOOR UNIT AND WIRED REMOTE CONTROLLER DISPLAY Please refer the flashing pattern as follows. Indoor Unit : ASU9/ 12RLF1 The OPERATION, TIMER and ECONOMY indicators operate as follows according to the error contents. Indoor Unit Display Wired Remote Trouble Controller...

  • Page 25: Wired Remote Controller Display (Option)

    2-1-2 WIRED REMOTE CONTROLLER DISPLAY (OPTION) 1. SELF - DIAGNOSIS When " Er " 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 MOTU WETH FR SA ex.

  • Page 26: Trouble Shooting With Error Code

    2-2 TROUBLE SHOOTING WITH ERROR CODE Indicate or Display: Trouble shooting 1-1 OUTDOOR UNIT Error Method: Serial communication error Refer to error code table. (Serial Reverse Transfer Error) Detective details: Detective Actuators: When the indoor unit cannot receive the serial signal from Outdoor unit Outdoor unit Main PCB more than 2minutes after power ON, or the indoor unit cannot receive Outdoor unit Fan motor...
  • Page 27 Indicate or Display: Trouble shooting 1-2 INDOOR UNIT Error Method: Serial communication error Refer to error code table. (Serial Forward Transfer Error) Detective details: Detective Actuators: When the outdoor unit cannot receive the serial signal from Indoor unit Indoor unit Controller PCB more than 10seconds.
  • Page 28 Trouble shooting 2 Indicate or Display: INDOOR UNIT Error Method: Remote controller communication Refer to error code table. error Detective details: Detective Actuators: When the indoor unit cannot receive the signal from Wired Remote Control Indoor unit Controller PCB more than 1minute during normal operation. Wired Remote Control Forecast of Cause: 1.
  • Page 29 Trouble shooting 3 Indicate or Display: Indicate or Display: INDOOR UNIT Error Method: Indoor unit main PCB error Refer to error code table. Detective details: Detective Actuators: When power is on and there is some below case. Indoor unit Controller PCB 1.
  • Page 30 Indicate or Display: Trouble shooting 4 INDOOR UNIT Error Method: INDOOR UNIT Refer to error code table. Manual auto switch error Detective Actuators: Detective details: Indoor unit Controller PCB When the Manual Auto Switch becomes ON for consecutive 60 or more seconds.
  • Page 31 Indicate or Display: Trouble shooting 5 INDOOR UNIT Error Method: INDOOR UNIT Refer to error code table. Room Temperature Sensor Error Detective Actuators: Detective details: Indoor unit Controller PCB When Room Temperature Thermistor open or short-circuit is detected. Room Temperature Thermistor Forecast of Cause : 1.
  • Page 32 Indicate or Display: Trouble shooting 6 INDOOR UNIT Error Method: INDOOR UNIT Refer to error code table. Indoor unit Heat Ex. sensor error Detective Actuators: Detective details: Indoor unit Controller PCB When Heat Ex. Temperature Thermistor open or short-circuit is detected. Heat Ex.
  • Page 33 Indicate or Display: Trouble shooting 7 INDOOR UNIT Error Method: Indoor unit fan motor error Refer to error code table. Detective Actuators: Detective details: When the condition that actual frequency of Indoor Fan is Indoor unit Controller PCB below 1/3 of target frequency is continued more than 56 seconds. Indoor unit fan motor Forecast of Cause: 1.
  • Page 34 Trouble shooting 8 Indicate or Display: Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Outdoor unit main PCB error Detective details: Detective Actuators: Access to EEPROM failed due to some cause after outdoor unit started. Outdoor unit Main PCB Forecast of Cause: 1.
  • Page 35 Indicate or Display: Trouble shooting 9 OUTDOOR UNIT Error Method: INDOOR UNIT Refer to error code table. PFC circuit error Detective Actuators: Detective details: When inverter output DC voltage is higher than 415V for over 3 seconds, Outdoor unit Main PCB the compressor stops.
  • Page 36 Indicate or Display: Trouble shooting 10 OUTDOOR UNIT Error Method: Refer to error code table. IPM error Detective Actuators: Detective details: When more than normal operating current to IPM in Main PCB flows, Outdoor unit Main PCB the compressor stops. Compressor After the compressor restarts, if the same operation is repeated within 40sec, the compressor stops again.
  • Page 37 Indicate or Display: Trouble shooting 11 OUTDOOR UNIT Error Method: INDOOR UNIT Discharge thermistor error Refer to error code table. Detective details: Detective Actuators: When Discharge pipe temperature thermistor open or short-circuit Outdoor unit Main PCB is detected at power ON or while running the compressor. Discharge pipe temperature thermistor Forecast of Cause : 1.
  • Page 38 Indicate or Display: Trouble shooting 12 OUTDOOR UNIT Error Method: Refer to error code table. Outdoor unit Heat Ex. sensor error Detective details: Detective Actuators: Outdoor unit Main PCB When Heat exchanger temperature thermistor open or Heat exchanger temperature thermistor short-circuit is detected at power ON or while running the compressor.
  • Page 39 Indicate or Display: Trouble shooting 13 OUTDOOR UNIT Error Method: Refer to error code table. Outdoor thermistor error Detective details: Detective Actuators: Outdoor unit Main PCB When Outdoor temperature thermistor open or short-circuit is Outdoor temperature thermistor detected at power ON or while running the compressor. Forecast of Cause : 1.
  • Page 40 Indicate or Display: Trouble shooting 14 OUTDOOR UNIT Error Method: Current sensor error Refer to error code table. Detective Actuators: Detective details: When Input Current Sensor has detected 0A, while Inverter Compressor is Outdoor unit Main PCB operating at higher than 56rps, after 1minute upon starting the Compressor. (Except during the defrost operation) Forecast of Cause : 1.
  • Page 41 Trouble shooting 15 Indicate or Display: OUTDOOR UNIT Error Method: Refer to error code table. Trip detection Detective details: Detective Actuators: "Protection stop by overcurrent generation after inverter compressor start Outdoor unit Main PCB processing completed'' generated consecutively 10 times. Compressor * The number of generations is reset if the start-up of the compressor succeeds.
  • Page 42 Trouble shooting 16 Indicate or Display: OUTDOOR UNIT Error Method: Compressor motor control error Refer to error code table. Detective details: Detective Actuators: While running the compressor, if the detected rotor location is out of Outdoor unit Main PCB phase with actual rotor location more than 90°, Compressor the compressor stops.

  • Page 43: Outdoor Unit Fan Motor Error

    Trouble shooting 17 Indicate or Display: OUTDOOR UNIT Error Method: Outdoor unit fan motor error Refer to error code table. Detective Actuators: Detective details: When outdoor fan rotation speed is less than 100rpm in 20 seconds Outdoor unit Main PCB after fan motor starts, fan motor stops.

  • Page 44: 4-Way Valve Error

    Indicate or Display: Trouble shooting 18 INDOOR UNIT Error Method: Refer to error code table. 4-way valve error Detective Actuators: Detective details: When the indoor heat exchanger temperature is compared with Indoor unit Controller PCB the room temperature, and either following condition is detected Heat Ex.
  • Page 45 Indicate or Display: Trouble shooting 19 OUTDOOR UNIT Error Method: INDOOR UNIT Discharge temperature error Refer to error code table. Detective details: Detective Actuators: When the discharge temperature becomes higher than 230°F (110°C), Outdoor unit Main PCB the compressor stops. Discharge pipe temperature thermistor After the compressor restarts, if the same operation is repeated, the compressor stops permanently.

  • Page 46: Trouble Shooting With No Error Code

    2-3 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 47 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 48 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, check if there is an open cable connection.
  • Page 49 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 50 Forecast of Cause : Trouble shooting 24 1. Abnormal installation (Indoor/ Outdoor) Abnormal Noise 2. Fan failure (Indoor/ Outdoor) 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 51: Service Parts Information

    2-4 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 52 SERVICE PARTS INFORMATION 2 Inverter Compressor Check Point 1 : Check Connection Check terminal connection of Compressor (loose or incorrect wiring) Terminal cover opened Terminal cover opened C(W) C(W) S(V) (BLACK) (BLACK) (RED) R(U) S(V) R(U) (RED) (WHITE) (WHITE) AOU9RLFW1 AOU12RLFW1 Check Point 2 : Check Winding Resistance Check winding resistance of each terminal...
  • Page 53 SERVICE PARTS INFORMATION 3 Outdoor unit Electronic Expansion Valve ( EEV ) Check Point 1 : Check Connections Check connection of connector (CN40) ( Loose connector or open cable ) EXPANSION VALVE COIL BLUE CN40 ORANGE YELLOW WHITE Check Point 2 : Check Coil of EEV Check Point 3 : Check Voltage from Main PCB.
  • Page 54 SERVICE PARTS INFORMATION 4 Indoor unit fan motor Check Point 1 : Check rotation of Fan Rotate the fan by hand when operation is off. (Check if fan is caught, dropped off or locked motor) >>If Fan or Bearing is abnormal, replace it. Check Point 2 : Check resistance of Indoor Fan Motor Refer to below.

  • Page 55: Appending Data

    R410A WALL MOUNTED type INVERTER 3 . APPENDING DATA...

  • Page 56: Function Setting

    3-1. FUNCTION SETTING 3-1-1 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 57 1-5. Setting the Room temperature sensor switching (Only for Wired remote controller) When using the Wired remote controller temperture sensor, change the setting to "Both" (01). Factory setting) Setting Description Function Number Setting Value Indoor unit Both * 00 : Sensor on the indoor unit is active. * 01 : Sensors on both indoor unit and wired remote controller is active.

  • Page 58: Procedures To Change The Function Setting For Wireless Rc

    3-1-2 Procedures to change the Function Setting for wireless RC Perform the “FUNCTION SETTING” according to the installation conditions using the remote controller. • This procedure changes to the function settings used to control the indoor unit according to the installation conditions. Incorrect settings can cause the indoor unit to malfunction.
  • Page 59 FUNCTION SETTING METHOD (for Wired remote controller) (1) Press the SET TEMP. buttons ( ) ( ) and FAN button simultaneously for more than 5 seconds to enter the function setting mode. SU MO TU WE TH FR SA (2) Press the SET BACK button to select the indoor unit number. SET BACK SU MO TU WE TH FR SA Unit number of Indoor unit...

  • Page 60: Thermistor Resistance Values

    3-2. Thermistor Resistance Values 3-2-1 INDOOR UNIT Room temperature thermistor Indoor heat exchanger thermistor Temp °F(°C) Resistance(k ) Voltage(V) Temp°F(°C) Resistance(k ) Voltage(V) 14 (-10) 58.3 0.73 -22 (-30) 1131.9 0.21 23 (-5) 44.0 0.93 -13 (-25) 804.5 0.29 32 (0) 33.6 1.15 -4 (-20)
  • Page 61 1116,Suenaga,Takatsu-ku,Kawasaki 213-8502,Japan Nov. 2013 Printed in Japan...

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