SPLIT TYPE ROOM AIR CONDITIONER WALL MOUNTED type INVERTER SERVICE INSTRUCTION Models R410A Indoor unit Outdoor unit ASU09RL2 ASU12RL2 AOU09RL2 AOU12RL2
CONTENTS 1. DESCRIPTION OF EACH CONTROL OPERATION 1. COOLING OPERATION................................................................................................ 2. HEATING OPERATION................................................................................................. 3. DRY OPERATION......................................................................................................... 4. AUTO CHANGEOVER OPERATION............................................................................
. APPENDING DATA 3-1 FUNCTION SETTING................................................................................................. 03-01 3-1-1 INDOOR UNIT.................................................................................................... 03-01 3-1-2 Procedures to change the Function Setting for wireless RC.............................. 03-03 3-2 Thermistor Resistance Values..................................................................................... 03-06 3-2-1 INDOOR UNIT.....
R410A WALL MOUNTED type INVERTER 1 .
1. COOLING OPERATION 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 2°C(4°F) higher than a set temperature, the compressor operation frequency will attain to maximum performance. * If the room temperature is some degrees lower than a set temperature, the compressor will be stopped.
2. HEATING OPERATION 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 3°C (6°F) than a set temperature, the compressor operation frequency will attain to maximum performance. * If the room temperature is some degrees higher than a set temperature, the compressor will be stopped.
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 18°C (64°F) and 30°C (88°F) in 1°C (2°F) steps. (Fig. 3 : Operation flow chart in Auto changeover) START YES Room temp. >Ts+2°C (4°F) ? NO NO TS : Setting temperature Room temp.
5. INDOOR FAN CONTROL 1. Fan speed ( Table 6 : Indoor fan speed ) Operation mode Air flow mode Powerful Hi Me+ Me Lo Quiet Cool air prevention S-Lo Powerful Hi Me Lo Quiet * Soft Quiet Heating Cooling/ Fan Dry Speed (rpm) ASU09RL2 1420 1360 1290 1120 900 700 600 480 1400 1320 1120 840 700 600 X zone: 700 J zone: 600 ASU12RL2 1420 1360 1290 1120 900 700 600 480 1400 1320 1120 860 700 600 X zone: 700 J zone: 600 *Note, during Economy operation and operation mode is Fan, air flow is 1 step downs.
5. HEATING OPERATION Switch the airflow [Auto], and the indoor fan motor will run according to a room temperature, as shown in Fig. 5 On the other hand, if switched in [Hi] [Quiet], the indoor motor will run at a constant airflow of [Heat] operation modes Quiet, Lo, Me, High, as shown in Table 6. ( Fig.
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. ( Table 8 : Type of Motor ) AC motor DC motor AOU09RL2 AOU12RL2 2.
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 Cooling/Dry modes , , , : During Heating 1 2 3 The Remote Controller's display does not change. 4 5 6 7 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.
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 11. (Table 11 : Compressor frequency range) Cooling / Dry Heating Minimum Maximum Minimum Maximum 18rps 80rps 96rps 18rps 120rps AOU09RL2 AOU12RL2 2. OPEARTION FREQUENCY CONTROL AT NORMAL START UP The compressor frequency soon after the start-up is controlled as shown in the Fig.9. (Fig.
9. TIMER OPEARTION CONTROL 9-1 WIRELESS REMOTE CONTROLLER The Table 13 shows the available timer setting based on the product model. ( Table 13 : Timer Setting ) ON TIMER / OFF TIMER PROGRAM TIMER SLEEP TIMER ASU09RL2 ASU12RL2 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 ON timer : When the clock reaches the set time, the air conditioner will be turned on.
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 1°C (2°F). It increases the setting temperature another 1°C (2°F) after 1 hour.
10. PREVENT TO RESTART FOR 3 MINUTES ( 3 MINUTES ST ) The compressor won't enter operation status for 2 minutes and 20 seconds after the compressor is stopped, even if any operation is given. 11. FOUR-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 four-way valve is switched in 2 minutes and 20 seconds later after the compressor stopped. 12.
14. FORCED COOLING OPERATION (TEST OPERATION) When FORCED COOLING OPERATION is set, the operation is controlled as shown in Table15. ( Table15 : FORCED COOLING OPERATION ) OPERATION MODE FAN CONT. MODE TIMER MODE SETTING TEMP. SETTING LOUVER SWING ECONOMY Forced cooling operation Cooling Hi Room Temp is not controlled Horizontal (It is changed follow as setting of remote controller) OFF - Forced cooling operation is started when press MANUAL AUTO button for 10 seconds or more.
. DEFROST OPERATION CONTROL 1. CONDITION OF STARTING THE DEFROST OPERATION The defrost operation starts as shown in the following Table 18. (Table 18 : Condition of starting Defrost Operation) Normal defrost Compressor integrating operation time Less than 25 minutes More than 25 minutes Outdoor heat exchanger temp. < = -17°C (1.4°F) (at outside air temp. > -10°C (14°F) ) = Does not operate Outdoor heat exchanger temp. < = Outside air temp. - 7°C (-44.6°F) or Outdoor heat exchanger temp.
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 Outside air temp. = > -10°C (14°F) Outdoor HEX temp. Below - 17°C(1.4°F) Outside air temp. < -10°C (14°F) Intermittent operation Compressor OFF count : 40 times (Less than 10min.) Outdoor HEX temp. - Outside air temp. Below - 7°C(-44.
19. 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. 1. OFF DEFROST OPERATION CONDITION In heating operation, the outdoor heat exchanger temperature is less than - 4°C (24.
20. 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 .
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 22 : Anti-freezing Protection Operation / Release Temperature) Outdoor temperature Over than 10°C (50°F)*1 or 12°C (53.6°F) *2 Less than 10°C(50°F) *1 or 12°C (53.6°F) *2 Temperature Temperature 7°C (44.
R410A WALL MOUNTED type INVERTER 2 .
2. TROUBLESHOOTING 2-1 ERROR DISPLAY Please refer the flashing pattern as follows. Indoor Unit : ASU09/ 12RL2 The Operation, Timer and Economy lamps operate as follows according to the error contents.
2-2 TROUBLE SHOOTING WITH ERROR CODE Trouble shooting 1-1 OUTDOOR UNIT Error Method: Indicate or Display: Refer to error code table. Serial communication error (Serial Reverse Transfer Error) Detective details: Detective Actuators: When the indoor unit cannot receive the serial signal from Outdoor unit more than 2minutes after power ON, or the indoor unit cannot receive the serial signal more than 15seconds during normal operation. Outdoor unit Main PCB Forecast of Cause: 1. Connection failure 2.
Trouble shooting 1-2 INDOOR UNIT Error Method: Indicate or Display: Refer to error code table. Serial communication error (Serial Forward Transfer Error) Detective details: Detective Actuators: When the outdoor unit cannot receive the serial signal from Indoor unit more than 10seconds. Indoor unit Controller PCB Indoor unit Fan motor Forecast of Cause: 1. Connection failure 2. External cause Check Point 1-1 : Reset the power and operate Does Error indication show again? 3. Controller PCB failure 4.
Trouble shooting 2 INDOOR UNIT Error Method: Indicate or Display: Indoor unit PCB model information error Refer to error code table. Detective details: Detective Actuators: Indoor unit Controller PCB When power is on and there is some below case. 1. When model information of EEPROM is incorrect. 2. When the access to EEPROM failed. Forecast of Cause: 1. External cause 2. Defective connection of electric components Check Point 1-1 : Reset Power Supply and operate 3.
Trouble shooting 3 INDOOR UNIT Error Method: INDOOR UNIT Manual auto switch error Indicate or Display: Refer to error code table. Detective details: Detective Actuators: Indoor unit Controller PCB Indicator PCB Manual auto switch When the Manual auto switch becomes ON for consecutive 60 or more seconds. Forecast of Cause : 1. Manual auto switch failure 2.Controller PCB and Indicator PCB failure Check Point 1 : Check the Manual auto switch Check if Manual auto switch is kept pressed.
Indicate or Display: Trouble shooting 4 INDOOR UNIT UNIT Error Method: Refer to error code table. Room temp. sensor error Detective details: Detective Actuators: Indoor unit Controller PCB Room temperature thermistor When Room temperature thermistor open or short-circuit is detected. Forecast of Cause : 1. Connector connection failure 2.Thermistor failure 3. Controller PCB failure Check Point 1 : Check connection of Connector Check if connector is removed. Check erroneous connection.
Trouble shooting 5 INDOOR UNIT Error Method: INDOOR UNIT Indoor unit Heat Ex. middle temp. sensor error Indicate or Display: Detective Actuators: Detective details: Refer to error code table. When Heat Ex. temperature thermistor open or short-circuit is detected. Indoor unit Controller PCB Heat Ex. temperature thermistor Forecast of Cause : 1. Connector connection failure 2.Thermistor failure 3. Controller PCB failure Check Point 1 : Check connection of Connector Check if connector is removed.
Trouble shooting 6 INDOOR UNIT Error Method: Indicate or Display: Refer to error code table. Indoor unit fan motor error Detective Actuators: Detective details: Indoor unit Controller PCB Indoor unit Fan motor When the condition that actual frequency of Indoor Fan is below 1/3 of target frequency is continued more than 56 seconds. Forecast of Cause: 1. Fan rotation failure 2. Fan motor winding open 3. Motor protection by surrounding temperature rise 4. Control PCB failure 5.
Trouble shooting 7 OUTDOOR UNIT Error Method: Indicate or Display: Refer to error code table. Outdoor unit main PCB model information error or communication error Detective Actuators: Outdoor unit Main PCB Detective details: When model information of EEPROM is incorrect at power ON. If the above operation is repeated 3 times, the compressor stops permanently. Forecast of Cause: 1. External cause (Noise, temporary open, voltage drop) Check Point 1-1 : Reset Power supply and operate 2.
Trouble shooting 8 OUTDOOR UNIT Error Method: INDOOR UNIT PFC circuit error Detective Actuators: Indicate or Display: Refer to error code table. Detective details: When inverter output DC voltage is higher than 415V for over 3 seconds, the compressor stops. If the same operation is repeated 5 times, the compressor stops permanently. Outdoor unit Main PCB Forecast of Cause : 1. External cause 2. Connector connection failure 3.
Trouble shooting 9 OUTDOOR UNIT Error Method: Trip terminal L error Detective Actuators: Outdoor unit Main PCB Indicate or Display: Refer to error code table. Detective details: When the signal from FO terminal of IPM in Main PCB is "L"(=0V) while the compressor stops. Forecast of Cause : 1. Main PCB failure Check Point 1 : Replace Main PCB Change Main PCB.
Trouble shooting 10 OUTDOOR UNIT Error Method: INDOOR UNIT Indicate or Display: Detective Actuators: Detective details: Refer to error code table. Discharge temp. sensor error When Discharge pipe temperature thermistor open or short-circuit is detected at power ON or while running the compressor. Outdoor unit Main PCB Discharge pipe temperature thermistor Forecast of Cause : 1. Connector connection failure 2.Thermistor failure 3.
Trouble shooting 11 OUTDOOR UNIT Error Method: Indicate or Display: Refer to error code table. Outdoor unit Heat Ex. liquid temp. sensor error Detective Actuators: Outdoor unit Main PCB Heat exchanger temperature thermistor Detective details: When Heat exchanger temperature thermistor open or short-circuit is detected at power ON or while running the compressor. Forecast of Cause : 1. Connector connection failure 2.Thermistor failure 3.
Indicate or Display: Trouble shooting 12 OUTDOOR UNIT Error Method: Refer to error code table. Outdoor temp. sensor error Detective details: Detective Actuators: Outdoor unit Main PCB Outdoor temperature thermistor When Outdoor temperature thermistor open or short-circuit is detected at power ON or while running the compressor. Forecast of Cause : 1. Connector connection failure 2.Thermistor failure 3. Main PCB failure Check Point 1 : Check connection of Connector Check if connector is removed.
Trouble shooting 13 OUTDOOR UNIT Error Method: Current sensor error Indicate or Display: Refer to error code table. Detective details: Detective Actuators: Outdoor unit Main PCB When Input Current Sensor has detected 0A, while Inverter Compressor is operating at higher than 56rps, after 1minute upon starting the Compressor. (Except during the defrost operation) Forecast of Cause : 1. Defective connection of electric components Check Point 1-1 : Reset Power Supply and operate 2. External cause 3.
Trouble shooting 14 OUTDOOR UNIT Error Method: Indicate or Display: Refer to error code table. Trip detection Detective Actuators: Detective details: Outdoor unit Main PCB Compressor When more than normal operating current to IPM in Main PCB flows, the compressor stops. After the compressor restarts, if the same operation is repeated within 40sec, the compressor stops again. If and repeats 5 times, the compressor stops permanently. Forecast of Cause : 1. Defective connection of electric components 4.
Trouble shooting 15 OUTDOOR UNIT Error Method: Compressor rotor position detection error Detective Actuators: Outdoor unit Main PCB Compressor Indicate or Display: Refer to error code table. Detective details: If the detected rotor location is out of phase with actual rotor location more than 90°, the compressor stops. After the compressor restarts, if the same operation is repeated within 40sec, the compressor stops again. If and repeats 5 times, the compressor stops permanently. Forecast of Cause : 1.
Indicate or Display: Trouble shooting 16 OUTDOOR UNIT Error Method: Refer to error code table. Outdoor unit fan motor error Detective details: Detective Actuators: When outdoor fan rotation speed is less than 100rpm in 20 seconds after fan motor starts, fan motor stops. After fan motor restarts, if the same operation within 60sec is repeated 3 times in a row, compressor and fan motor stops. If and repeats 5 times in a row, compressor and fan motor stops permanently.
Trouble shooting 17 INDOOR UNIT Error Method: 4-way valve error Detective Actuators: Indoor unit Controller PCB Heat Ex. temperature thermistor Room temperature thermistor 4-way valve Indicate or Display: Refer to error code table. Detective details: When the indoor heat exchanger temperature is compared with the room temperature, and either following condition is detected continuously two times, the compressor stops. Cooling or Dry operation [Indoor heat exchanger temp.] - [Room temp.
Trouble shooting 18 OUTDOOR UNIT Error Method: INDOOR UNIT Discharge temperature error Indicate or Display: Detective Actuators: Detective details: Refer to error code table. Outdoor unit Main PCB Discharge temperature thermistor Forecast of Cause : "Protection stop by "discharge temperature 110degC during compressor operation"" generated 2 times within 24 hours. 1. 2/ 3-way valve not opened 2. Capillary tube, strainer clogged 3. Outdoor unit operation failure, foreign matter on heat exchanger 4.
2-3 TROUBLE SHOOTING WITH NO ERROR CODE Trouble shooting 19 Forecast of Cause: Indoor Unit - No Power 1. Power supply failure 2. External cause 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 & Technical Manual.
Trouble shooting 20 Forecast of Cause: Outdoor Unit - No Power 1. Power supply failure 2. External cause 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 & Technical Manual.
Trouble shooting 21 Forecast of Cause: No Operation (Power is ON) 1. Setting/ Connection failure 2. External cause 3. Electrical component defective Check Point 1 : Check indoor and outdoor installation condition Are these Indoor Unit, Outdoor Unit, and Remote Control suitable model numbers to connect? >> If there is some abnormal condition, correct it by referring to Installation manual and Data & Technical Manual. OK Turn off Power and check/ correct followings.
Trouble shooting 22 Forecast of Cause: No Cooling / No Heating 1. Indoor Unit error 2. Outdoor unit error 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? Check if Energy save function is operated.
Trouble shooting 23 Abnormal Noise Forecast of Cause : 1. Abnormal installation (Indoor/ Outdoor) 2. Fan failure (Indoor/ Outdoor) 3. Compressor failure (Outdoor) Diagnosis method when abnormal noise is occurred Abnormal noise is coming from Indoor unit. (Check and correct followings) Abnormal noise is coming from Outdoor unit.
2-4 SERVICE PARTS INFORMATION SERVICE PARTS INFORMATION 1 Compressor Diagnosis method of Compressor ( If Outdoor Unit LED displays Error, refer to Trouble shooting ) Does not start up Is there open or loose connection cable? Check Main PCB, connection of Compressor, and winding resistance. (Refer to the next page).
SERVICE PARTS INFORMATION 2 Inverter Compressor Check Point 1 : Check Connection Check terminal connection of Compressor (loose or incorrect wiring) Terminal cover opened C(W) (BLACK) S(V) (WHITE) R(U) (RED) Check Point 2 : Check Winding Resistance Check winding resistance of each terminal If the resistance value is 0 or infinite, replace Compressor. C Resistance Value : 1.
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 ) CN40 1 2 3 4 5 1 2 3 4 5 RED BLUE ORANGE YELLOW WHITE EXPANSION VALVE COIL EV Check Point 3 : Check Voltage from Main PCB. Check Point 2 : Check Coil of EEV Remove connector, check each winding resistance of Coil. Read wire Orange - Red If it does not appear, replace Main PCB.
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. Circuit-test "Vm" and "GND" terminal. (Vm: DC voltage, GND: Earth terminal) >>If they are short-circuited (below 300 k ), replace Indoor fan motor and Controller PCB.
R410A WALL MOUNTED type INVERTER 3 .
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. Settings will not be changed if invalid numbers or setting values are selected. 1-1.
1-4. Setting the Auto Restart Enable or disable automatic system restart after a power outage. ( Factory setting) Setting Description Yes No Function Number Setting Value 00 40 01 *Auto restart is an emergency function such as for power failure etc. Do not start and stop the indoor unit by this function in normal operation. Be sure to operate by the control unit, or external input device. 1-5. Remote controller signal code Change the indoor unit Signal Code, depending on the remote controllers.
3-1-2 Procedures to change the Function Setting for wireless RC The function settings of the control of the indoor unit can be changed by this procedure 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. The settings may be selected between the following two: Function Number or Setting Value.
STEP 2. Selecting the Function Number and Setting Value (1) Press the SET TEMP.( ) ( ) buttons to select the function number. (Press the MODE button to switch between the left and right digits.) (2) Press the FAN button to proceed to setting the value. (Press the FAN button again to return to the function number selection.) (3) Press the SET TEMP.( ) ( ) buttons to select the setting value. (Press the MODE button to switch between the left and right digits.
REMOTE CONTROLLER SIGNAL CODE SETTING Use the following steps to select the signal code of the remote controller. (Note that the air conditioner cannot receive a signal code if the air conditioner has not been set for the signal code.) (1) Press the MODE button for at least 5 seconds to display the current signal code. (initially set to ). (2) Press the SET TEMP.( ) ( ) button to change the signal code between . Match the code on the display to the air conditioner signal code.
3-2. Thermistor Resistance Values 3-2-1 INDOOR UNIT Room temperature thermistor Temp ( C) -10.0 -5.0 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0 Resistance(k ) Voltage(V) 55.46 42.36 32.67 25.39 19.91 15.71 12.5 10.0 8.051 6.52 5.316 4.354 0.76 0.95 1.17 1.41 1.67 1.94 2.22 2.50 2.77 3.03 3.26 3.48 Indoor heat exchanger thermistor Temp ( C) -30.0 -25.0 -20.0 -15.0 -10.0 -5.0 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0 50.0 55.0 60.0 63.0 Resistance(k ) Voltage(V) 977.6 713.2 526.8 392.
1116,Suenaga,Takatsu-ku,Kawasaki 213-8502,Japan Mar.
