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SERVICE
INSTRUCTION
R410A
SPLIT TYPE
ROOM AIR CONDITIONER
WALL MOUNTED
INVERTER
Models
Indoor unit
ASU 9RLF
ASU12RLF
ASU15RLS
type
Outdoor unit
AOU 9RLFW
AOU12RLFW
AOU15RLS

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Chapters

Troubleshooting

   Related Manuals for Fujitsu ASU 9RLF

   Summary of Contents for Fujitsu ASU 9RLF

  • Page 1

    SPLIT TYPE ROOM AIR CONDITIONER WALL MOUNTED type INVERTER SERVICE INSTRUCTION Models Indoor unit Outdoor unit ASU 9RLF AOU 9RLFW ASU12RLF AOU12RLFW ASU15RLS AOU15RLS 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 ( Table4 : Indoor Fan Speed ) Speed (rpm) Operation mode Air flow mode ASU9RLF ASU12RLF ASU15RLS 1330 1500 Heating 1290 1360 1160 1230 1050 Quiet Cool air prevention S-Lo Cooling/ Fan 1330 1440 1160 1230...

  • Page 8

    5. HEATING OPERATION Switch the airflow [AUTO], and the indoor fan motor will run according to a room temperature, as shown in Figure4. 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 Table4.

  • Page 9: Outdoor Fan Control

    6. OUTDOOR FAN CONTROL 1. Outdoor Fan Motor Following table shows the type of the outdoor fan motor. The control method is different between AC motor and DC motor. ( Table6 : Type of Motor ) AC Motor DC Motor ASU9/ 12RLF,15RLS 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 Types of Air flow Direction Setting: : During Heating/Cooling/Dry modes The Remote Controller's display does not change. Use the air direction adjustments within the ranges shown above.

  • 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 table10. (Table10 : Compressor Operation Frequency Range) Cooling Heating ASU9RLF 22rps 79rps 22rps 99rps 28rps 37rps ASU12RLF 18rps 96rps...

  • Page 12: Timer Operation Control

    9. TIMER OPEARTION CONTROL The table11 shows the available timer setting based on the product model. (Table11 : Timer Setting) ON TIMER / OFF TIMER PROGRAM TIMER SLEEP TIMER ASU9/ 12RLF,15RLS 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: 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 Table12. 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 15: Manual Auto Operation (indoor Unit Body Operation)

    15. MANUAL AUTO OPERATION (Indoor unit body operation) If MANUAL AUTO Button is set, the operation is controlled as shown in Table13. If the remote control is lost or battery power dissipated, this function will work without the remote control. (Table13) Manual auto operation Forced cooling operation...

  • Page 16: Defrost Operation Control

    20. DEFROST OPERATION CONTROL 1. CONDITION OF STARTING THE DEFROST OPERATION The defrost operation starts as shown in the following Table 16. (Table 16 : Condition of starting Defrost Operation) Compressor integrating operation time Normal defrost Less than 25 minutes More than 25 minutes Outdoor heat exchanger temp.

  • Page 17

    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) Integrating defrost Normal defrost Intermittent operation Continuous operation utside air temp.

  • Page 18: Off Defrost Operation Control

    21. 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 defrost lamp lighting, the outdoor unit will allow the heat exchanger to defrost, and then stop. 1.

  • Page 19: Various Protections

    22. 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 20

    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 . (Table19 : Anti-freezing Protection Operation / Release Temperature) Outdoor temperature Temperature...

  • Page 21: Trouble Shooting

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

  • Page 22: Error Display

    2. TROUBLESHOOTING 2-1 ERROR DISPLAY 2-1-1 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 service personnel. Unit number (usually 0) Error code SU MO TU WE TH FR SA ex.

  • Page 23: Outdoor Unit Display

    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 , [ON/OFF] simultaneously for 3 seconds or more to start the self-diagnosis.

  • Page 24: Indoor Unit Display

    2-1-3 INDOOR UNIT DISPLAY 1. ERROR DISPLAY Operation lamp Timer lamp Economy lamp Trouble Error contents (Green) (Orange) (Green) shooting 1 times flash 1 times flash Continuous flash Serial communication error 2 times flash Remote controller communication error 1 times flash 3 times flash Indoor unit main PCB error 2 times flash...

  • Page 25: Trouble Shooting With Error Code

    2-2 TROUBLE SHOOTING WITH ERROR CODE Indicate or Display: Trouble shooting 1-1 Outdoor Unit : No indication OUTDOOR UNIT Error Method: Indoor Unit : Operation lamp: 1 time Flash, Timer lamp: 1 time Flash Serial communication error Economy lamp: Continuous flash. (Serial Reverse Transfer Error) ERROR CODE : [E : 11] Detective details:...

  • Page 26

    Indicate or Display: Trouble shooting 1-2 Outdoor Unit : No indication INDOOR UNIT Error Method: Indoor Unit : Operation lamp: 1 time Flash, Timer lamp: 1 time Flash Serial communication error Economy lamp: Continuous flash. (Serial Forward Transfer Error) ERROR CODE : [E : 11] Detective details: Detective Actuators: When the outdoor unit cannot receive the serial signal from Indoor unit...

  • Page 27

    Trouble shooting 2 Indicate or Display: INDOOR UNIT Error Method: Outdoor Unit : No indication Indoor Unit : Operation lamp: 1 time Flash, Timer lamp: 2 times Flash Remote controller communication Economy lamp: Continuous flash. error ERROR CODE : [E : 12] Detective Actuators: Detective details: When the indoor unit cannot receive the signal from Wired Remote Control...

  • Page 28

    Trouble shooting 3 Indicate or Display: Indicate or Display: INDOOR UNIT Error Method: Outdoor Unit : No indication Indoor Unit : Operation lamp: 3 times Flash, Timer lamp: 2 times Flash Indoor unit main PCB error Economy lamp: Continuous flash. ERROR CODE : [E : 32] Detective details: Detective Actuators:...

  • Page 29

    Indicate or Display: Trouble shooting 4 INDOOR UNIT Error Method: Outdoor Unit : No indication INDOOR UNIT Indoor Unit : Operation lamp: 3 times Flash, Timer lamp: 5 times Flash Manual auto switch error Economy lamp: Continuous flash. ERROR CODE : [E : 35] Detective Actuators: Detective details: Indoor unit Controller PCB...

  • Page 30

    Indicate or Display: Trouble shooting 5 Outdoor Unit : No indication INDOOR UNIT Error Method: INDOOR UNIT Indoor Unit : Operation lamp: 4 times Flash, Timer lamp: 1 time Flash Room Temperature Sensor Error Economy lamp: Continuous flash. ERROR CODE : [E : 41] Detective Actuators: Detective details: Indoor unit Controller PCB...

  • Page 31: Indoor Unit Heat Ex. Sensor Error

    Indicate or Display: Trouble shooting 6 Outdoor Unit : No indication INDOOR UNIT Error Method: INDOOR UNIT Indoor Unit : Operation lamp: 4 times Flash, Timer lamp: 2 times Flash Indoor unit Heat Ex. sensor error Economy lamp: Continuous flash. ERROR CODE : [E : 42] Detective Actuators: Detective details:...

  • Page 32: Indoor Unit Fan Motor Error

    Indicate or Display: Trouble shooting 7 Outdoor Unit : No indication INDOOR UNIT Error Method: Indoor Unit : Operation lamp: 5 times Flash, Timer lamp: 1 time Flash Indoor unit fan motor error Economy lamp: Continuous flash. ERROR CODE : [E : 51] Detective Actuators: Detective details: When the condition that actual frequency of Indoor Fan is...

  • Page 33: Outdoor Unit Main Pcb Error

    Trouble shooting 8 Indicate or Display: Indicate or Display: OUTDOOR UNIT Error Method: Outdoor Unit : No indication Indoor Unit : Operation lamp: 6 times Flash, Timer lamp: 2 times Flash Outdoor unit main PCB error Economy lamp: Continuous flash. ERROR CODE : [E : 62] Detective details: Detective Actuators:...

  • Page 34: Pfc Circuit Error

    Indicate or Display: Trouble shooting 9 Outdoor Unit : No indication OUTDOOR UNIT Error Method: INDOOR UNIT Indoor Unit : Operation lamp: 6 times Flash, Timer lamp: 4 times Flash PFC circuit error Economy lamp: Continuous flash. ERROR CODE : [E : 64] Detective Actuators: Detective details: When inverter output DC voltage is higher than 415V for over 3 seconds,...

  • Page 35: Ipm Error

    Indicate or Display: Trouble shooting 10 Outdoor Unit : LED 0.5sec ON/ 0.5sec OFF OUTDOOR UNIT Error Method: Indoor Unit : Operation lamp: 6 times Flash, Timer lamp: 5 times Flash IPM error Economy lamp: Continuous flash. ERROR CODE : [E : 65] Detective Actuators: Detective details: When more than normal operating current to IPM in Main PCB flows,...

  • Page 36: Discharge Thermistor Error

    Indicate or Display: Trouble shooting 11 OUTDOOR UNIT Error Method: Outdoor Unit : LED 0.1sec ON/ 0.1sec OFF INDOOR UNIT Indoor Unit : Operation lamp: 7 times Flash, Timer lamp: 1 time Flash Discharge thermistor error Economy lamp: Continuous flash. ERROR CODE : [E : 71] Detective details: Detective Actuators:...

  • Page 37: Outdoor Unit Heat Ex. Sensor Error

    Indicate or Display: Trouble shooting 12 Outdoor Unit : LED 0.1sec ON/ 0.1sec OFF OUTDOOR UNIT Error Method: Indoor Unit : Operation lamp: 7 times Flash, Timer lamp: 3 times Flash Outdoor unit Heat Ex. sensor error Economy lamp: Continuous flash. ERROR CODE : [E : 73] Detective details: Detective Actuators:...

  • Page 38: Outdoor Thermistor Error

    Indicate or Display: Trouble shooting 13 Outdoor Unit : LED 0.1sec ON/ 0.1sec OFF OUTDOOR UNIT Error Method: Indoor Unit : Operation lamp: 7 times Flash, Timer lamp: 4 times Flash Outdoor thermistor error Economy lamp: Continuous flash. ERROR CODE : [E : 74] Detective details: Detective Actuators: Outdoor unit Main PCB...

  • Page 39: Current Sensor Error

    Indicate or Display: Trouble shooting 14 Outdoor Unit : LED 2sec ON/ 2sec OFF OUTDOOR UNIT Error Method: Indoor Unit : Operation lamp: 8 times Flash, Timer lamp: 4 times Flash Current sensor error Economy lamp: Continuous flash. ERROR CODE : [E : 84] Detective Actuators: Detective details: When Input Current Sensor has detected 0A, while Inverter Compressor is...

  • Page 40: Trip Detection

    Trouble shooting 15 Indicate or Display: OUTDOOR UNIT Error Method: Outdoor Unit : LED 0.1sec ON/ 2sec OFF Indoor Unit : Operation lamp: 9 times Flash, Timer lamp: 4 times Flash Trip detection Economy lamp: Continuous flash. ERROR CODE : [E : 94] Detective details: Detective Actuators: "Protection stop by overcurrent generation after inverter compressor start...

  • Page 41: Compressor Motor Control Error

    Trouble shooting 16 Indicate or Display: OUTDOOR UNIT Error Method: Outdoor Unit : LED 0.1sec ON/ 2sec OFF Indoor Unit : Operation lamp: 9 times Flash, Timer lamp: 5 times Flash Compressor motor control error Economy lamp: Continuous flash. ERROR CODE : [E : 95] Detective details: Detective Actuators: While running the compressor, if the detected rotor location is out of...

  • Page 42: Outdoor Unit Fan Motor Error

    Trouble shooting 17 Indicate or Display: OUTDOOR UNIT Error Method: Outdoor Unit : LED 5sec ON/ 5sec OFF Indoor Unit : Operation lamp: 9 times Flash, Timer lamp: 7 times Flash Outdoor unit fan motor error Economy lamp: Continuous flash. ERROR CODE : [E : 97] Detective details: Detective Actuators:...

  • Page 43: 4-way Valve Error

    Indicate or Display: Trouble shooting 18 Outdoor Unit : No indication INDOOR UNIT Error Method: Indoor Unit : Operation lamp: 9 times Flash, Timer lamp: 9 times Flash 4-way valve error Economy lamp: Continuous flash. ERROR CODE : [E : 99] Detective Actuators: Detective details: When the indoor heat exchanger temperature is compared with...

  • Page 44: Discharge Temperature Error

    Indicate or Display: Trouble shooting 19 OUTDOOR UNIT Error Method: Outdoor Unit : Continuously lighting INDOOR UNIT Indoor Unit : Operation lamp: 10 times Flash, Timer lamp: 1 time Flash Discharge temperature error Economy lamp: Continuous flash. ERROR CODE : [E : A1] Detective details: Detective Actuators: When the discharge temperature becomes higher than 230°F (110°C),...

  • Page 45: 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 46

    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 47

    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 48

    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 49

    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 50: 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 Is there open or loose connection Is there open or loose connection Check if vibration noise by loose bolt or contact noise...

  • Page 51

    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 Terminal cover opened C(T) C(W) C(W) S(V) (BLACK) (BLACK) (BLACK) (RED) R(U) S(W) S(V) R(U) (RED)

  • Page 52

    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 3 : Check Voltage from Main PCB. Check Point 2 : Check Coil of EEV Remove connector, check each winding Remove Connector and check Voltage (DC12V)

  • Page 53

    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 54: Appending Data

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

  • Page 55: 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 56

    1-4. Setting the Auto Restart Enable or disable automatic system restart after a power outage. Factory setting) Setting Description Function Number Setting Value 1-5. Setting the Indoor room temperature sensor switching function (Only for Wired remote controller) The following settings are needed when use the control by Wired remote controller temperature sensor.

  • Page 57: Procedures To Change The Function Setting For Wireless Rc

    3-1-2 Procedures to change the Function Setting for wireless RC 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 malfunction. After the power is turned on, perform the "FUNCTION SETTING" according to the installation conditions using the remote controller.

  • Page 58

    Custom code setting for remote controller (1) Press the MODE button for more then 5 seconds. (2) Press the SET TEMP. ( ) buttons to change the signal code between Match the code on the display to the air conditioner signal code. (initially set to (3) Press the MODE button.

  • Page 59: Thermistor Resistance Values

    3-2. Thermistor Resistance Values 3-2-1 INDOOR UNIT Room temperature thermistor Indoor heat exchanger thermistor Temp ( C) Resistance(k ) Voltage(V) Temp ( C) Resistance(k ) Voltage(V) -10.0 58.2 0.73 -30.0 1131.9 0.21 -5.0 44.0 0.93 -25.0 804.5 0.29 33.6 1.15 -20.0 579.6 0.40...

  • Page 60

    1116,Suenaga,Takatsu-ku,Kawasaki 213-8502,Japan Sep. 2010 Printed in Japan...

This manual also for:

Aou 9rlfw, Aou12rlfw, Aou15rls, Asu12rlf, Asu15rls

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