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Fujitsu AOU09RL2 User's Manual

1. gt gt Upon correcting the removed connector or mis wiring reset the power Check Point 3 Replace Main PCB P If Check Point 1 2 do not improve the symptom change Main Check Point 4 Replace Compressor gt If Check Point 3 do not improve the symptom change Compressor 02 17 Trouble shooting 16 Indicate or Display OUTDOOR UNIT Error Method Outdoor unit fan motor error Refer to error code table Detective Actuators Detective details Outdoor unit Main PCB When outdoor fan rotation speed is less than 100rpm in 20 seconds Outdoor unit Fan motor 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 Qand repeats 5 times in a row compressor and fan motor stops permanently Forecast of Cause 1 Fan rotation failure 2 Motor protection by surrounding temperature rise 3 Main PCB failure 4 Outdoor 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 gt gt Fan or Bearing is abnormal replace it Check Point 2 Check ambient temp around motor Check excessively high temperature around the motor If there is any surrounding equipment that causes heat gt gt Upon the temperature coming down restart operation Check Point 3 Check Outdoor unit fan motor Check Outdoor unit fa
2. Check if connector is removed Instant drop Check if there is a large load electric Check erroneous connection apparatus in the same circuit Check if cable is open MER Momentary power failure Check if there is a defective gt gt Upon correcting the removed connector or mis wiring contact or leak current in the reset the power power supply circuit Noise Check if there is any equipment causing harmonic wave near electric line Neon bulb or electric equipment that may cause harmonic wave Check the complete insulation of grounding Check Point 4 Replace Main PCB gt If Check Point 1 2 do not improve the symptom change Main PCB 02 15 Trouble shooting 14 Indicate or Display OUTDOOR UNIT Error Method Trip detection Refer to error code table Detective Actuators Detective details Outdoor unit Main PCB 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 repeats 5 times the compressor stops permanently Compressor Forecast of Cause 1 Defective connection of electric components 2 Outdoor heat exchanger clogged 3 Compressor failure 4 Main PCB failure Check Point 1 Check connections of Outdoor unit electrical components Check if the terminal connection is loose Check if connector is removed Check erroneous connection
3. The FUNCTION SETTING doesn t become effective if it doesn t do so TIMER HOFF BIYON CANCEL Note 1 Small H is displayed on the right of the signal code during the FUNCTION SETTING 03 04 E 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 4 button to change the signal code between d Match the code on the display to the air conditioner signal code 3 Press the MODE button again The signal code will be changed If no buttons are pressed within 30 seconds after the signal code is displayed the display returns to the original status In this case start again from step 1 The air conditioner signal code is set to H prior to shipment Contact your retailer to change the signal code The remote controller resets to signal code H when the batteries in the remote controller are replaced If you use a signal code other than signal code reset the signal code after replacing the batteries If you do not know the air conditioner signal code setting try each of the signal codes H7 d until you find the code which operates the air conditioner
4. Check if cable is open gt gt Upon correcting the removed connector or mis wiring reset the power Check Point 2 Check Heat exchanger Is there anything obstructing the air distribution circuit Is there any clogging of Outdoor Heat Exchanger Check Point 3 Check Compressor Check Compressor PARTS INFORMATION 2 Check Point 4 Replace Main PCB gt If Check Point 1 3 do not improve the symptom change Main PCB 02 16 Trouble shooting 15 Indicate or Display OUTDOOR UNIT Error Method Compressor rotor position Refer to error code table detection error Detective Actuators Detective details Outdoor unit Main PCB If the detected rotor location is out of phase with actual rotor location Compressor more than 90 the compressor stops After the compressor restarts if the same operation is repeated within 40sec the compressor stops again If D Q repeats 5 times the compressor stops permanently Forecast of Cause 1 Defective connection of electric components 2 Main PCB failure 3 Compressor failure Check Point 1 Check Noise from Compressor Turn on Power and check operation noise gt If an abnormal noise show replace Compressor Check Point 2 Check connection of around the Compressor components For Compressor Terminal Main PCB Check if connector is removed Check erroneous connection Check if cable is open Refer to PARTS INFORMATION 2
5. Outdoor temperature Temperature I Temperature II Over than 10 C 50 F 1 o o or 12 C 53 6 F 2 44 6 Less than 10 50 1 or 12 C 53 6 F 2 13 C 55 4 F 1 When the temperature rises 2 When the temperature drops 4 COOLING PRESSURE OVERRISE PROTECTION When the outdoor unit heat exchange sensor temperature rises to 67 C 152 6 F or greater the compressor and the outdoor fan motor are stopped and trouble display is performed 5 HIGH TEMPERATURE RELEASE CONTROL HEATING MODE On heating mode the compressor frequency is controlled as following based on the detection value of the indoor heat exchanger temperature sensor Control System Indoor heat exchange temperature rises Compressor is stopped 63 C 145 4 F The compressor frequency is decreased 25rps every 120seconds 55 C 131 F The compressor frequency is decreased 3rps every 60seconds 53 C 127 4 F Stable zone 50 C 122 F It returns to the normal operation Indoor heat exchange temperature drops 01 17 WALL MOUNTED type INVERTER 2 TROUBLESHOOTING 2 1 ERROR DISPLAY Please refer the flashing pattern as follows Indoor Unit ASUO9 12RL2 The Operation Timer and Economy lamps operate as follows according to the error contents Indoor Unit Displa Trouble Error Contents Operation 11 Timer Economy t shooting Green Orange Green Indoor unit H
6. gt Quiet Quiet gt Soft Quiet 2 FAN OPERATION The airflow can be switched in 5 steps such as Auto Quiet Lo Me Hi while the indoor fan only runs When fan mode is set at Auto it operates on Me fan Speed 3 COOLING OPERATION Switch the airflow Auto and the indoor fan motor will run according to a room temperature as shown in Fig4 On the other hand if switched in Hi Quiet the indoor motor will run at a constant airflow of Cool operation modes Quiet Lo Me Hi as shown in Table 6 Fig 4 Airflow change over Cooling Auto When the room temperature rises When the room temperature drops TR Ts gt 2 5 C 5 F TR Room temperature Hi mode Ts Setting temperature TR Ts gt 2 C 4 F 2 5 C 5 F gt TR Ts gt 1 5 C 3 F 2 C 4 F gt TR Ts gt 1 C 2 F Me mode 1 5 C 3 F gt TR Ts 1 C 2 F gt TR Ts Lo mode 4 DRY OPERATION Refer to the Table 6 During the dry mode operation the fan speed setting can not be changed 01 04 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 5 Airflow change over Heating Auto When the room temperature rises TR Ts 2 1 C 2 F Lo
7. power supply Check the voltage of power supply gt gt Check if AC103V AC115V 10 127V AC115V 10 appears at Outdoor Unit Terminal L N Check Point 4 Check Serial Signal Reverse Transfer Signal Check Serial Signal Reverse Transfer Signal gt gt Check if Indicated value swings between AC45V and 135 at Outdoor Unit Terminal 1 3 gt gt If it is abnormal replace Main PCB 02 02 Trouble shooting 1 2 Indicate or Display INDOOR UNIT Error Method Serial communication error Refer to error code table Serial Forward Transfer Error Detective Actuators Detective details Indoor unit Controller PCB When the outdoor unit cannot receive the serial signal from Indoor unit Indoor unit Fan motor more than 10seconds Forecast of Cause 1 Connection failure 2 External cause 3 Controller PCB failure 4 Indoor unit fan motor failure Check Point 1 1 Reset the power and operate NO Does Error indication show again Check Point 2 Check Connection Check Point 1 2 Check external cause such as noise Check any loose or removed connection line of Check the complete insulation of the grounding Indoor unit and Outdoor unit i Check if there is any equipment that causes harmonic wave gt gt If there is an abnormal condition correct it by near the power cable Neon light bulb or any electronic referring to Installation Manual or Data amp equipment which causes h
8. 0 C 14 F Normal defrost Outdoor heat exchanger temp lt Outside air temp 7 C 44 6 F or Outdoor heat exchanger temp lt 20 C 13 F at outside air temp lt 10 C 14 F Integrating defrost Compressor integrating operation time More than 240 minutes More than 213 minutes Less than 10 minutes For continuous operation For continuous operation For intermittent operation Outdoor heat exchanger Outdoor heat exchanger OFF count of the compressor temperature below 3 C 6 F temperature below 5 C 10 F 40 times If the compressor continuous operation time is less than 10 minutes the OFF number of the compressor is counted If any defrost operated the compressor OFF count is cleared 2 CONDITION OF THE DEFROST OPERATION COMPLETION Defrost operation is released when the conditions become as shown in Table 19 Table 19 Defrost Release Condition Release Condition Outdoor heat exchanger temperature sensor value is higher than 16 C 60 8 F or Compressor operation time has passed 15 minutes 01 13 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 Outside air temp 2 10 C Outside air temp lt 10 C Intermittent operation Continuous operation 14 F
9. 02 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 Room temp gt Tst2 C 4 F YES Ts Setting temperature Room temp lt Ts 2 C 4 F YES HEATING OPERATION gt C COOLING OPERATION Thermostat remains in OFF state for 6 minutes or longer YES Thermostat remains in OFF state for 6 minutes or longer YES System stops or operation command other than auto changeover operation System stops or operation command other than auto changeover operation YES NO NO 01 03 5 INDOOR FAN CONTROL 1 Fan speed Table 6 Indoor fan speed Speed rpm Operation mode Air flow mode ASUOSRL2 ASU12RL2 Heating Powerful Hi Lo Quiet Cool air prevention Cooling Fan Powerful Quiet Soft Quiet X zone 700 X zone 700 J zone 600 J zone 600 Note during Economy operation and operation mode is Fan air flow is 1 step downs Hi gt Me Me gt Lo Lo
10. 03 05 3 2 Thermistor Resistance Values 3 2 1 INDOOR UNIT Room temperature thermistor 55 46 977 6 39 78 2 78 31 92 3 05 25 8 3 2 2 OUTDOOR UNIT Discharge thermistor Outdoor heat exchanger thermistor Outdoor temperature thermistor Resistance k Q Resistance k 51 36 4903 246 10 00 3 96 41 33 3947 273 7978 4 14 33 64 3 196 2 99 6408 428 03 06 cO FUJITSU FUJITSU GENERAL LIMITED 1116 Suenaga Takatsu ku Kawasaki 213 8502 Japan Mar 2012 Printed in Japan
11. 14 F Outdoor HEX temp Outdoor HEX temp Compressor Compressor Compressor Below 17 C 1 4 F Outside air temp OFF count integrating integrating Below 7 C 44 6 F 40 times operation operation or Less than 10min Over 240 min Over 213 min Outdoor HEX temp Below 20 C 4 F Outdoor Outdoor heat exchanger heat exchanger temperature temperature Below 3 C Below 5 C 26 6 F 23 F Defrost start Defrost Indicator Operation lamp 7 sec 2 sec OFF Outdoor fan OFF Compressor speed 0 rps 9 4 way valve OFF Compressor speed 90rps Outdoor HEX temp Over 16 C 60 8 F or Compressor ON time Maximum 15 minutes Defrost end 01 14 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 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 8 F compressor continuous operation more than 10 minutes and compressor operation integrating time lasts for more than 30 minutes 2 OFF DEFROST END CONDITION Release Condition Outdoor heat exchanger temperature sensor value is higher than 16 C 60 8 F
12. 7 C 44 6 F or greater preheating is ended 16 ECONOMY OPERATION The ECONOMY operation functions by pressing ECONOMY button on the remote controller At the maximum output ECONOMY Operation is approximately 70 of normal air conditioner operation for cooling and heating The ECONOMY operation is almost the same operation as below settings Table 16 Cooling Dry Heating Target temperature Setting temp 1 C 2 F Setting temp 1 C 2 F 17 POWERFUL OPERATION The POWERFUL OPERATION functions by pressing POWERFUL button on the remote controller The indoor unit amp outdoor unit will operate at maximum power as shown in Table17 Table17 Powerful operation COMPRESSOR FREQUENCY Maximum FAN CONT MODE Powerful SETTING LOUVER Cooling Dry 3 Heating 5 Release Condition is as follows Cooling Dry Room temperature s Setting temperature 1 5 C 3 F or Operation time has passed 20 minutes Heating Room temperature Setting temperature 1 5 C 3 F or Operation time has passed 20 minutes 01 12 18 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 Compressor integrating operation time Less than 25 minutes More than 25 minutes Outdoor heat exchanger temp lt 17 C 1 4 F Does not operate at outside air temp gt 1
13. F SETTING LOUVER Standard SWING OFF ECONOMY 01 11 14 FORCED COOLING OPERATION TEST OPERATION When FORCED COOLING OPERATION is set the operation is controlled as shown in Table15 Table15 FORCED COOLING OPERATION U Forced cooling operation OPERATION MODE Cooling FAN CONT MODE Hi TIMER MODE SETTING TEMP Room Temp is not controlled SETTING LOUVER Horizontal It is changed follow as setting of remote controller SWING OFF ECONOMY Forced cooling operation is started when press MANUAL AUTO button for 10 seconds or During the forced cooling operation it operates regardless of room temperature sensor Operation lamp and Timer lamp blink at the same time during the forced cooling operation They blink for 1 second ON and 1 second OFF on both Operation lamp and Timer lamp same as test operation Forced cooling operation is released after 60 minutes of starting operation or pressing MANUAL AUTO button for 3 seconds or pressing START STOP button on the remote controller 15 COMPRESSOR PREHEATING When the outdoor heat exchanger temperature is lower than 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 temperature rises to
14. Heating operation gt Check Point 1 Check if 3 way valve gas side is open Check Point 1 Check if 2 way valve liquid side is open If the 3 way valve gas side was closed open the If the 2 way valve liquid side was closed open the 2 way valve liquid side and check operation OK 3 way valve gas side and check operation Check Point 2 Check the capillary tube strainer Capillary tube Strainer before Capillary clogging check Refer to Service Parts Information 3 Refer to Service Parts Information 3 Check Point 2 Check the capillary tube strainer Capillary tube Strainer after Capillary clogging check Check Point Check the outdoor unit exchanger OK Check for foreign object at heat exchanger Check if fan can be rotated by hand Motor check PARTS INFORMATION 5 Check Point 4 Check the discharge thermistor Discharger thermistor characteristics check Check by disconnecting thermistor from PCB For the characteristics of the thermistor refer to the Trouble shooting 10 Check Point 5 Check the refrigerant amount Leak check 02 20 2 3 TROUBLE SHOOTING WITH NO ERROR CODE Forecast of Cause Trouble shooting 19 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 cab
15. SPLIT TYPE ROOM AIR CONDITIONER WALL MOU NTED type INVERTER SERVICE INSTRUCTION Models Indoor unit Outdoor unit ASUO9RL2 AOUO9SRL2 ASU12RL2 AOU12RL2 Refrigerant R410A FUJITSU GENERAL LIMITED CONTENTS 1 DESCRIPTION OF EACH CONTROL OP 1 COOLING OPERATION 2 qe eere eee nere deae ee tee 01 01 2 HEATING OPERATION rione an nmb am q m 01 02 Sy DRY OPERATION n nd ods au ae ik eee onan a a 01 02 4 AUTO CHANGEOVER OPERATION 01 03 5 INDOOR FAN CONTROL 01 04 6 OUTDOOR FAN CONTROL titii ee ie ee te te Sasa asss 01 06 Z ECOUVER CONTROL 01 07 COMPRESSOR CONTROL opto pe 01 08 9 TIMER OPERATION CONTROL 01 09 10 PREVENT TO RESTART FOR 3 MINUTES 3 MINUTES ST 01 11 11 FOUR WAY VALVE EXTENSION 01 11 T2 AUTO RESTAR I 01 11 13 MANUAL AUTO OPERATION Indoor unit body operation 01 11 14 FORCED COOLING OPERATION nis ei iio Beene oes 01 12 15 COMPRESSOR PREHBEATING science sec nep Lote bees 01 12 16 ECONOMY OPERATION itecto pea sss eno M emai ea des
16. abnormal condition correct it by referring to Installation manual and Data amp Technical Manual Trouble shooting 21 Turn off Power and check correct followings there loose or removed communication line of Indoor Unit and Outdoor Unit Check Point 2 Check external cause at Indoor and Outdoor Voltage drop or Noise Instant drop Check if there is a large load electric apparatus in the same circuit Momentary power failure Check if there is a defective contact or leak current in the power supply circuit Noise Check if there is any equipment causing harmonic wave near electric line Neon bulb or electric equipment that may cause harmonic wave Check the complete insulation of grounding gt If the symptom does not change by above Check 1 2 replace Main PCB 02 23 Trouble shooting 22 Forecast of Cause 1 Indoor Unit error 2 Outdoor unit error 3 Effect by surrounding environment 4 Connection pipe Connection wire failure 5 Refrigeration cycle failure No Cooling No Heating 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 Check Point 2 Check Outdoor unit operation Check if Outdoor unit is operating Check any objects that obstruct the air flow route Check clogged Heat Exchanger Is the Valve open Check Point 3 Check Site condition Attention Strain
17. armonic wave Technical Manual Check Point 3 Check the voltage of power supply Check the voltage of power supply gt gt Check if AC103V AC115V 10 127V AC115V 10 appears at Outdoor Unit Terminal L N Check Point 4 Check Serial Signal Reverse Transfer Signal Check Serial Signal Forward Transfer Signal gt gt Check if Indicated value swings between AC30V and AC130V at Outdoor Unit Terminal 2 3 gt gt If it is abnormal replace Controller PCB gt gt If it is abnormal Check Indoor unit fan motor PARTS INFORMATION 4 2 If Indoor unit fan motor is abnormal replace Indoor unit fan motor and Controller PCB GREEN WHITE g BLACK 80 02 03 Trouble shooting 2 Indicate or Display INDOOR UNIT Error Method Indoor unit PCB model information Refer to error code table error Detective Actuators Detective details 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 Indoor unit Controller PCB Forecast of Cause 1 External cause 2 Defective connection of electric components 3 Controller PCB failure Check Point 1 1 Reset Power Supply and operate Does Error indication show again Check Point 2 Check Indoor unit electric components Check Point 1 2 Check external cause such as noise Check all connectors Check if the ground connection is prop
18. by outdoor temperature as shown in the Table12 Table12 Limitation of Compressor Frequency Cooling Dry 10 C 50 F 14 59 F 40 C 104 F Under Over Under Over Under Over AOU09RL2 35rps 23rps AOU12RL2 45rps 27rps Heating TC 01 08 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 4 ON TIMER OFF TIMER PROGRAM TIMER SLEEP TIMER ASUO9RL2 ASU12RL2 1 OPEARTION FREQUENCY RANGE OFF timer When the clock reaches the set time the air conditioner will be turned off Operation mode 1 Stop mode Set time of timer ON timer When the clock reaches the set time the air conditioner will be turned on Operation mode Stop mode Set time of timer 2 PROGRAM TIMER program timer allows the OFF timer and ON timer to be used in combination one time Operation mode Operation mode Operation mode Stop mode Stop mode Stop mode Set time Set time Set time Set time Operation will start from the timer setting either OFF timer or ON timer whichever is closest to the clock s current timer setting The order of operations is indicated by the arrow in the remote control unit s display SLEEP timer operation cannot be combined with ON timer operation 01 09 3 SLEEP TIMER If the sleep is set the room temperatur
19. de before turning on the power B FUNCTION SETTING METHOD for Wireless remote controller Entering the Function Setting Mode While pressing the FAN button and SET TEMP button simultaneously press the RESET button to enter the function setting mode INVERTER ay OOOO ODSLEEP OFF CANCEL STEP 1 Setting the Remote controller Signal Code 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 The signal code that is set through this process are applicable only to the signal in the FUNCTION SETTING For details on how to set the signal code through the normal process refer to SELECTING THE REMOTE CONTROLLER SIGNAL CODE 1 Press the SET TEMP 4 button to change the signal code between gt h gt L gt d Match the code on the display to the air conditioner signal code INVERTER inituially set to H If the signal code does not need to be selected press the MODE button and proceed to STEP 2 2 Press the MODE button to accept the signal code and proceed to STEP 2 The air conditioner signal code is set to H prior to shipment Contact your retailer to change the signal code The remote controller resets to signal code H when the batteries in the remote controller are replaced If you use a signal code other than signal code H reset the signal c
20. e 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 It increases the setting temperature another 1 C 2 F after 1 hour After that the setting temperature is not changed and the operation is stopped at the time of timer setting Set temperature rises Ts Set temperature 42 C 4 F 1 C 2 F Stop of operation Ts Set 60min In the heating operation mode When the sleep timer is set the setting temperature is decreased 1 C 2 F It decreases the setting temperature another 1 C 2 F every 30 minutes Upon lowering 4 C 8 F the setting temperature is not changed and the operation stops at the time of timer setting Set temperature lowers Ts Set temperature Stop of operation Set 30min 30min 30min 01 10 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 fou
21. eat Ex middle temp sensor error 4 times 2 times Continuous Outdoor unit main PCB model information error or communication error 6 times 2 times Continuous Outdoor unit Heat Ex liquid temp 7 36 sensor error meg NN x NN 02 01 2 2 TROUBLE SHOOTING WITH ERROR CODE Trouble shooting 1 1 Indicate or Display OUTDOOR UNIT Error Method Serial communication error Refer to error code table Serial Reverse Transfer Error Detective Actuators Detective details Outdoor unit Main PCB 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 Forecast of Cause 1 Connection failure 2 External cause 3 Main PCB failure Check Point 1 1 Reset the power and operate NO Does Error indication show again Check Point 2 Check Connection Check Point 1 2 Check external cause such as noise Check any loose or removed connection line of Check the complete insulation of the grounding Indoor unit and Outdoor unit i Check if there is any equipment that causes harmonic wave gt gt If there is an abnormal condition correct it by near the power cable Neon light bulb or any electronic referring to Installation Manual or Data amp equipment which causes harmonic wave Technical Manual Check Point 3 Check the voltage of
22. ective Actuators Detective details Indoor unit Controller PCB When Heat Ex temperature thermistor open or short circuit is detected 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 Check erroneous connection Check if thermistor cable is open gt gt Upon correcting the removed connector or mis wiring reset the power Check Point 2 Remove connector and check Thermistor resistance value Thermistor Characteristics Approx value 10 5C oc 5C 10 20 t 14 F 23 F 32 F 41 F 50 F 68 F Resistance Value 295 1 223 3 1707 1314 102 1 62 9 Temperature Resistance Value gt If Thermistor is either open or shorted replace it and reset the power Check Point 3 Check voltage of Controller PCB DC5 0V Make sure circuit diagram of indoor unit and check terminal voltage at Thermistor DC5 0V THERMISTOR PIPE CAA BLACK BLACK CAA BLACK BLACK THERMISTOR ROOM TEMP gt If the voltage does not appear replace Controller 02 07 Trouble shooting 6 Indicate or Display INDOOR UNIT Error Method Indoor unit fan motor error Refer to error code table Detective Actuators Detective details Indoor unit Con
23. equency 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 When the room temperature is between 2 5 C 5 F to 3 C 6 F of the setting temperature the compressor frequency is controlled within the range shown in Table 3 However the maximum frequency is limited shown in Table 4 based on the fan mode Table 3 Compressor frequency range Minimum Maximum frequency frequency AQUO9RL2 18rps AOU12RL2 120rps Table 4 Limit of maximum speed based on outdoor temperature Indoor fan mode AOUOSRL2 80rps AOU12RL2 120rps 3 DRY OPERATION The compressor frequency shall change according to the temperature set temperature and room temperature variation which the room temperature sensor of the indoor unit body has detected as shown in the Table 5 However after the compressor is driven the indoor unit shall run at operation frequency of 09 52 rps 12 61 rps for 60 seconds Table 5 Compressor frequency in Dry mode Operating Operating frequency frequency Fig 2 Compressor control based on room temperature When the room When the room temperature rises temperature drops Ts 1 5 C Ts 3 F Ts 0 5 C Ts 1 F Ts 1 5 C Ts 3 F 01
24. er loose connector or incorrect wiring Check if there is any equipment that causes harmonic wave Check any shortage or corrosion PCB near the power cable Neon light bulb or any electronic equipment which causes harmonic wave Check Point 3 Replace Controller PCB gt Change Controller PCB Note EEPROM EEPROM Electronically Erasable and Programmable Read Only Memory is a non volatile memory which keeps memorized information even if power is turned off It can change the contents electronically To change the contents it uses higher voltage than normal and it can not change a partial contents Rewriting shall be done upon erasing the all contents There is a limit in a number of rewriting p 02 04 Trouble shooting 3 Indicate or Display INDOOR UNIT Error Method Manual auto switch error Refer to error code table Detective Actuators Detective details Indoor unit Controller PCB When the Manual auto switch becomes ON for consecutive 60 or Indicator PCB more seconds Manual auto switch 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 Check ON OFF switching operation by using a meter gt gt If Manual Auto Switch is disabled on off switching replace it Check Point 2 Replace Controller PCB gt If Check Point 1 do not improve the s
25. er OK Check Point 2 Check each thermistor Isn t it fallen off the holder Is there a cable pinched gt gt Check characteristics of thermistor Refer to Trouble shooting 5 6 If defective replace the thermistor OK Check Point 3 Check the solenoid coil and 4 way valve Solenoid coil Remove CN30 from PCB and check the resistance value of coil Resistance value is 1 88kQ 2 29k at 20 C 68 F gt gt If it is Open or abnormal resistance value replace Solenoid Coil 4 way valve Check each piping temperature and the location of the valve by the temperature difference gt gt If the value location is not proper replace 4 way valve OK Check Point 4 Replace Controller PCB P If Check Point 1 3 do not improve the symptom replace Controller PCB 02 19 Trouble shooting 18 Indicate or Display OUTDOOR UNIT Error Method Discharge temperature error Refer to error code table Detective Actuators Detective details Outdoor unit Main PCB Protection stop by discharge temperature gt 110degC during compressor Discharge temperature thermistor operation generated 2 times within 24 hours Forecast of Cause 1 2 3 valve not opened 2 Capillary tube strainer clogged 3 Outdoor unit operation failure foreign matter on heat exchanger 4 Discharge temperature thermistor failure 5 Insufficient refrigerant 6 Main PCB failure lt Cooling operation gt lt
26. er normally does not have temperature difference between inlet and outlet as shown in D but if there is a Any windows open or direct sunlight difference like shown in there is a possibility of inside clogged In this case replace Strainer Is capacity of Indoor unit fitted to room size Check Point 4 Check Indoor Outdoor installation condition Check connection pipe specified pipe length amp Pipe diameter Check any loose or removed communication line gt gt If there is an abnormal condition correct it b referring to Installation Manual or Data amp Technica Manual Check if Strainer is clogged Refer to the figure at right Measure Gas pressure and if there is a leakage correct it gt gt When recharging the refrigerant make sure to perform vacuuming and recharge the specified amount Check Capillary tube PARTS INFORMATION 3 Check Compressor PARTS INFORMATION 1 2 02 24 Forecast of Cause Trouble shooting 23 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 front panel normal 5 Main unit installed in stable condition Is Main unit installed in stable condition 15 the installation of a
27. erts 01 12 17 POWEREDEOPEIRA TION a 1e eee 01 12 18 DEFROST OPERATION CONTROL etcetera ee 01 13 19 OFF DEFROST OPERATION 01 15 20 VARIOUS PROTECTIONS es 01 16 2 TROUBLE SHOOTING 2T ERROR DISPEAY nd doti edic Ska a Gum I eed Satin t 02 01 2 2 TROUBLE SHOOTING WITH ERROR CODE eee 02 02 2 3 TROUBLE SHOOTING WITH NO ERROR CODE ee 02 21 2 4 SERVICE PARTS INFORMATION coca eese petra terrace uctus 02 26 3 APPENDING DATA 3 1 FUNCTION SETTING Sera 03 01 teed TIO ORO UT S uuu tee E 03 01 3 1 2 Procedures to change the Function Setting for wireless RC 03 03 3 2 Thermistor Resistance Values s oe odit e ended bear ha oe M oe el 03 06 INDOOR SUNJIET eit nitens ees picture Si rust arp 03 06 3 2 2 OUTDOOR UNIT WALL MOUNTED type INVERTER 1 DESCRIPTION OF EACH CONTROL OPERATION 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 wil
28. etting air flow Indoor fan as shown in Table 7 S Lo OFF Table 7 Indoor fan speed Dry X zone J zone ASU09 12RL2 700rpm 600rpm 0 480rpm 700 01 05 Y zone Cooling 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 P AC motor DC mote AQUO9RL2 AOU12RL2 2 Fan Speed Table 9 Outdoor fan speed O mex Dy 730 650 470 2 730 470 360 AOUO9RL2 360 150 900 650 470 730 470 210 150 860 760 470 860 470 380 380 280 280 200 lt AOU12RL2 900 760 680 470 760 470 Y Z F G X Refer to Fig 8 Fig 8 Outside air temperature zone selection Outside air Outside air temperature temperature 21 C 70 F Y zone 19 C 66 F 12 C 54 F 10 C 50 F 2 C 36 F 0 C 32 F G zone outdoor fan speed mentioned adove depends on the compressor frequency When the compressor frequency increases the outdoor fan speed also changes to the higher speed When the compressor frequency decreases the outdoor fan speed also changes to the lower speed After the defrost control is operated on the heating mode the fan speed keeps at the higher speed as table 10 without relating to the compressor frequency Table 10 O
29. ir suction grille and Is Fan guard installed normally v Is Fan broken or deformed Is the screw of Fan loose Is there any object which obstruct the Fan rotation OK Check if vibration noise by loose bolt or contact noise of piping is happening OK Is Compressor locked gt gt Check Compressor PARTS INFORMATION 1 2 Is Fan broken or deformed Is the screw of Fan loose 15 there any object which obstruct the Fan rotation Trouble shooting 24 Forecast of Cause Water Leaking 1 Erroneous installation 2 Drain hose failure Diagnosis method when water leak occurs Diagnosis method when water is spitting out 5 Main unit installed in stable condition Is the filter clogged Is Main unit broken or deformed at the time of OK transportation or maintenance 5 s Check Gas pressure and correct it Is Drain hose connection loose if there was a gas leak Is there trap in Drain hose Is Drain hose clogged OK Is Fan rotating 02 25 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 Stops soon after starting up Abnormal noise Is there open or loose connection cable Is there open or loose connection Check if vibration noise by cable loose bolt or contact noise of piping is happening Check Main PCB con
30. ked motor gt gt 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 gt gt If they are short circuited below 300 kQ replace Indoor fan motor and Controller PCB Pin number Terminal function wire color symbol 1 Blue Feed back FG 2 Yellow Speed command Vsp 3 White Control voltage Vcc 4 Black Earth terminal GND 5 No function 6 Red DC voltage Vm SERVICE PARTS INFORMATION 5 Outdoor 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 gt gt If Fan or Bearing is abnormal replace it Check Point 2 Check resistance of Outdoor Fan Motor Refer to below Circuit test Vm and GND terminal Vm DC voltage GND Earth terminal gt gt If they are short circuited below 300 replace Outdoor fan motor and Main PCB Pin number Terminal function wire color symbol DC voltage Vm No function No function Earth terminal GND Control voltage Vcc Speed command Vsp Feed back FG 02 29 WALL MOUNTED type INVERTER 3 1 FUNCTION SETTING 3 1 1 INDOOR UNIT Follow the instructions in the Local Setup Procedure which is supplied with the remote control i
31. l attain to maximum performance If the room temperature is some degrees lower than a set temperature the compressor will be stopped When the room temperature is between 2 C 4 F to 2 5 C 5 F of the setting temperature the compressor frequency is controlled within the range shown in Table However the maximum frequency is limited in the range shown in Fig 1 based on the indoor fan mode and the outdoor temperature Table 1 Compressor frequency range Minimum Maximum Maximum frequency frequencyI frequencyT AOUO9RL2 18rps 57rps 80rps AOU12RL2 80rps 96rps When the compressor operates for 30 minutes continuously at over the maximum frequency IL the maximum frequency is changed from Maximum Frequency I to Maximum Frequency Fig 1 Outdoor temperature zone Table 2 Limit of maximum speed based on outdoor temperature When the outdoor LTS ea temp zone Hi Me Lo Quiet When the outdoor temperature rises ITE emperature drops 36 C 97 F 34 C 93 F 32 C 90 F 30 C ASU12RL2 86 F 21 C 70 F 19 C I 66 F 12 C E zone 73 54 F 10 F zone 73rps 50 F 2 C 36 F 0 32 01 01 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 fr
32. le gt gt If abnormal condition is found correct it by referring to Installation Manual or Data amp Technical Manual OK Check Point 2 Check external cause at Indoor and Outdoor Voltage drop or Noise Instant drop Check if there is a large load electric apparatus in the same circuit Momentary power failure Check if there is a defective contact or leak current in the power supply circuit Noise Check if there is any equipment causing harmonic wave near electric line Neon bulb or electric equipment that may cause harmonic wave Check the complete insulation of grounding OK Check Point 3 Check Electrical Components AC Check the voltage of power supply gt gt Check if AC103 127V appears at Outdoor Unit Terminal L N Check Fuse in Main PCB gt gt If Fuse is open check if the wiring between Terminal and Main PCB is loose and replace Fuse Check Varistor in Main PCB gt gt f Varistor is defective there is a possibility of an abnormal power supply Check the correct power supply and replace Varistor Upon checking the normal power supply replace Varistor 02 21 Trouble shooting 20 Forecast of Cause 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 gt gt abnormal condition is found correct i
33. mode 1 C 2 F gt TR Ts gt 2 C 4 F Me mode 2 C 4 F gt TR Ts mode 6 COOL AIR PREVENTION CONTROL Heating mode When the room temperature drops TR Room temperature Ts Setting temperature TR Ts gt 1 5 3 F 1 5 C 3 F gt TR Ts gt 2 5 C 5 F 2 5 C 5 F gt TR Ts The maximum value of the indoor fan speed is set as shown in Fig 6 based on the detected temperature by the indoor heat exchanger sensor on heating mode Fig 6 Cool air prevension control Normal operation When the Indoor heat exchanger temp rises When the Indoor heat exchanger temp drops Hi or setting 42 C 108 F Fan mode Mer or setting 37 C 99 F 39 C 102 F Fan mode Lo or setting 34 C 93 F 37 C 99 F Fan mode Cool air 32 C 90 F 30 C 86 F prevention 28 C 82 F Lower speed is selected When the Indoor heat exchanger temp rises lt Powerful operation gt When the Indoor heat exchanger temp drops Powerful 108 F 102 F 37 C 99 F 34 C 37 C 93 F 99 F Cool air 32 C 30 C prevention 90 F 86 F 28 C 82 F Lower speed is selected 7 MOISTURE RETURN PREVENTION CONTROL Cooling mode amp Dry mode Switch the airflow Auto at cooling mode and the indoor fan motor will run as shown in Fig 7 Fig 7 Indoor fan control Compressor ON OFF Indoor fan S
34. moved Check erroneous connection Check if cable is open gt gt Upon correcting the removed connector or mis wiring reset the power Check Point 3 Replace Main PCB gt If Check Point 1 2 do not improve the symptom change Main 02 10 Trouble shooting 9 Indicate or Display OUTDOOR UNIT Error Method Refer to error code table Trip terminal L error Detective Actuators Detective details Outdoor unit Main PCB 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 p Change Main 02 11 Trouble shooting 10 OUTDOOR UNIT Error Method Discharge temp sensor error Refer to error code table Indicate or Display Detective Actuators Detective details Outdoor unit Main PCB When Discharge pipe temperature thermistor open or short circuit Discharge pipe temperature thermistor is detected at power ON or while running the compressor Forecast of Cause 1 Connector connection failure 2 Thermistor failure Main PCB failure Check Point 1 Check connection of Connector Check if connector is removed Check erroneous connection Check if thermistor cable is open gt gt Upon correcting the removed connector or mis wiring reset the power OK Check Point 2 Remove connector and check Thermistor resistance value Thermistor Characteristics Approx
35. mperature Resistance Value kQ 80 56 60 23 45 40 Temperature 20 256 30 C Resistance Value kQ 12 26 10 00 7 978 6 408 5 184 4 216 3 451 2 841 gt If Thermistor is either open or shorted replace it and reset the power Check Point 3 Check voltage of Main PCB DC5 0V Make sure circuit diagram of outdoor unit and check terminal voltage at Thermistor DC5 0V THERMISTOR PIPE BLACK WWD BLACK BLACK WWD BLACK THERMISTOR DISCHARGE ANA ANA THERMISTOR OUTDOOR TN Nie BLACK BLACK p If the voltage does not appear replace Main 02 14 Trouble shooting 13 Indicate or Display OUTDOOR UNIT Error Method Refer to error code table Current sensor error Detective Actuators Detective details Outdoor unit Main PCB When Input Current Sensor has detected 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 2 External cause 3 Main PCB failure Check Point 1 1 Reset Power Supply and operate Does Error indication show again Check Point 2 Check Point 1 2 Check connections of Outdoor Unit Electrical Components Check external cause at Indoor and Outdoor Check if the terminal connection is loose Voltage drop or Noise
36. n accordance with the installed condition After the power is turned on perform the Function Setting on the remote control 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 Setting the Filter Sign The indoor unit has a sign to inform the user that it is time to clean the filter Select the time setting for the filter sign display interval in the table below according to the amount of dust or debris in the room If you do not wish the filter sign to be displayed select the setting value for No indication Factory setting Setting Description Function Number I Value Standard 400 hours Long interval 1000 hours 11 Short interval 200 hours No indication 1 2 Cooling Room Temperature Correction Depending on the installed environment the room temperature sensor may require a correction The settings may be selected as shown in the table below 9 08 setting Standard Slightly lower control Lower control Warmer control 1 3 Heating Room Temperature Correction Depending on the installed environment the room temperature sensor may require a correction The settings may be selected as shown in the table below setting Standard Lower control Slightly warmer control Warmer control 03 01 1 4 Set
37. n motor PARTS INFORMATION 5 gt gt If Outdoor unit fan motor is abnormal replace Outdoor unit fan motor Check Point 4 Check Output Voltage of Main PCB Check outdoor unit circuit diagram and the voltage Measure at Main PCB side connector FAN MOTOR Red Black 290V AC115V 10 360V AC115 10 White Black 15 1 5V gt If the voltage is not correct replace Main PCB 02 18 Trouble shooting 17 Indicate or Display INDOOR UNIT Error Method Refer to error code table 4 way valve error Detective Actuators Detective details Indoor unit Controller PCB When the indoor heat exchanger temperature is compared with Heat Ex temperature thermistor the room temperature and either following condition is detected Room temperature thermistor continuously two times the compressor stops 4 way valve Cooling or Dry operation Indoor heat exchanger temp Room temp gt 10degC 20 F Heating operation Indoor heat exchanger temp room temp 10degC 20 F If the same operation is repeated 5 times the compressor stops permanently Forecast of Cause 1 Connector connection failure 2 Thermistor failure 3 Coil failure 4 4 way valve failure 5 Controller PCB failure Check Point 1 Check connection of Connector Check if connector is removed Check erroneous connection Check if thermistor cable is open gt gt Upon correcting the removed connector or mis wiring reset the pow
38. nal cause Noise temporary open voltage drop 2 Main PCB failure Check Point 1 1 Reset Power supply and operate Does Error indication show again Check Point 2 Replace Main PCB Check Point 1 2 Check external cause gt Change Main PCB Check if temporary voltage drop was not generated Check if momentary open was not generated Check if ground is connection correctly or there are no related cables near the power line 02 09 Trouble shooting 8 OUTDOOR UNIT Error Method PFC circuit error Refer to error code table Indicate or Display Detective Actuators Detective details Outdoor unit Main PCB 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 Forecast of Cause 1 External cause 2 Connector connection failure Main PCB failure Check Point 1 Check external cause at Indoor and Outdoor Voltage drop or Noise Instant drop Check if there is a large load electric apparatus in the same circuit Momentary power failure Check if there is a defective contact or leak current in the power supply circuit Noise Check if there is any equipment causing harmonic wave near electric line Neon bulb or electric equipment that may cause harmonic wave Check the complete insulation of grounding Check Point 2 Check connection of Connector Check if connector is re
39. nection of Is Gas pipe valve open Defective Compressor Compressor and winding resistance Low pressure is too low can be considered due to inside dirt clogging or broken component Replace Compressor Refer to the next page gt gt If there is no failure the defect of Compressor is considered Locked compressor due to clogged dirt or less oil Check if Refrigerant is leaking Recharge Refrigerant Check if capillary tube strainer is clogged Replace Compressor PARTS INFORMATION 3 Check Main PCB connection of Compressor and winding resistance Refer to the next page gt gt If there is no failure the defect of Compressor can be considered Compression part broken or valve defective Replace Compressor 02 26 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 gt If the resistance value is 00 or infinite replace Compressor C Resistance Value 1 32 at 20 C 68 F Check Point 3 Replace Main PCB gt If the symptom does not change with above Check 1 2 replace Main PCB 02 27 SERVICE PARTS INFORMATION 3 Outdoor unit Electronic Expansion Valve EEV Check Point 1 Check Connectio
40. nnector and check Thermistor resistance value Thermistor Characteristics Approx value Temperature Resistance Value kQ Temperature Resistance Value kQ gt If Thermistor is either open or shorted replace it and reset the power Check Point 3 Check voltage of Main PCB DC5 0V Make sure circuit diagram of outdoor unit and check terminal voltage at Thermistor DC5 0V THERMISTOR PIPE BLACK WWD BLACK BLACK IWS BLACK THERMISTOR DISCHARGE THERMISTOR OUTDOOR BLACK BLACK P If the voltage does not appear replace Main hp ho gt 02 13 Trouble shooting 12 Indicate or Display OUTDOOR UNIT Error Method Refer to error code table Outdoor temp sensor error Detective Actuators Detective details 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 Connector connection failure 2 Thermistor failure Main PCB failure Check Point 1 Check connection of Connector Check if connector is removed Check erroneous connection Check if thermistor cable is open gt gt Upon correcting the removed connector or mis wiring reset the power Check Point 2 Remove connector and check Thermistor resistance value Thermistor Characteristics Approx value Te
41. ns Check connection of connector 40 Loose connector or open cable EXPANSION RED VALVE COIL BLUE ORANGE YELLOW WHITE Check Point 2 Check Coil of EEV Remove connector check each winding resistance of Coil White Red 462 49 at 20 C Blue Red p If Resistance value is abnormal replace EEV Check Point 3 Check Voltage from Main PCB Remove Connector and check Voltage DC 12V gt If it does not appear replace Main Check Point 4 Check Noise at start up on Power and check operation noise gt If an abnormal noise does not show replace Main PCB Check Point 5 Check Opening and Closing Operation of Valve When Valve is closed ithas a temp difference between Inlet and Outlet CLOSE Example Hot Gas Pipe In Hi TEMP Pipe Out Normal TEMP Check Point 6 Check Strainer If it is open it has no temp difference between Inlet and Outlet OPEN Example Hot Gas Pipe In Hi TEMP Pipe Out Hi TEMP Strainer normally does not have temperature difference between inlet and outlet as shown in 1 but if there is a difference as shown in 2 there is a possibility of inside clogged In this case replace Strainer 02 28 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 loc
42. ode after replacing the batteries If you do not know the air conditioner signal code setting try each of the signal codes H7 d until you find the code which operates the air conditioner Note 1 Small H is displayed on the right of the signal code during the FUNCTION SETTING 03 03 STEP 2 Selecting the Function Number and Setting Value 1 Press the SET TEMP 4 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 buttons to select the setting value Press the MODE button to switch between the left and right digits INVERTER INVERTER AUTO n a COOL AN mama Function DRY lt R gt MED DRY gini Ed 4 LOW Number FAN i HEATUA QUIET HEAT 2 1 1 Setting Value 4 Press the SLEEP button then after you hear the beep emitted from the indoor unit press the START STOP button to confirm the settings 5 Press the RESET button to cancel the function setting mode 6 After completing the FUNCTION SETTING be sure to turn off the power and turn it on again N CAUTION After turning off the power wait 10 seconds or more before turning on it again ke 5 GTARUSTOP
43. or Compressor operation time has passed 15 minutes OFF Defrost Flow Chart Heating operation stop Outdoor heat exchanger temperature Below 4 C 24 8 F Compressor continuous operation Over 10 minutes Compressor integrating operation Over 30 minutes Defrost start Defrost Indicater Operation lamp 7 sec ON 2 sec OFF Outdoor heat exchanger temperature Over 16 C 60 8 F or Compressor ON time Over 15 minutes Defrost end 01 15 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 I 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 I When the discharge temperature becomes lower than Temperature II the protection control of the compressor frequency will be released When the discharge temperature becomes higher than Temperature III the compressor is stopped and the indoor unit body Operation lamp and Timer lamp starts blinking Table 20 Discharge temperature over rise prevension control Release temperature Temperature I Temperature II 104 C 101 C 219 2 F 213 8 F 2 CURRENT RELEASE CONTROL The compressor frequency is controlled so that the outdoor unit inpu
44. r s fan is not operating or when operating at very low speeds To select Horizontal Airflow Swing Operation No function 01 07 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 AOU09RL2 Ags SOPS apie 120rps AOU12RL2 96rps 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 Compressor control at start up Frequency V FrequencylV FrequengyTI Frequency I Frequency I 7 Time D Time Time Time Time Frequency I Frequency I Frequency I FrequencyIV Frequency V Frequency VI AOU09RL2 56rps 67rps 75rps 78rps 78rps 78rps AOU12RL2 56rps 74rps 87 97 108rps 119rps Time 77 Time 2 3 Time Time Time AOUOSRL2 80sec 140sec 200sec 380sec 440sec 440sec AOU12RL2 60sec 100sec 140sec 200sec 350sec 410sec 3 LIMITATION OF COMPRESSOR FREQUENCY BY OUTDOOR TEMPERATURE The minimum compressor frequency is limited
45. r way valve is switched in 2 minutes and 20 seconds later after the compressor stopped 12 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 Operation contents memorized when the power is interrupted Operation mode Set temperature Set air flow Timer mode and set time Set air flow Direction Swing ECONOMY operation 13 MANUAL AUTO OPERATION Indoor unit body operation When the remote control is lost or battery power dissipated this function will work without the remote control When MANUAL AUTO button is set more than 3seconds and less than 10seconds MANUAL AUTO OPERATION will be started as shown in Table14 To stop operation press the MANUAL AUTO button for 3seconds Table14 MANUAL AUTO OPERATION Press and hold MANUAL AUTO s Manual auto operation button for 3 10seconds OPERATION MODE Auto changeover qu MANUAL AUTO g FAN CONT MODE Auto FORCED COOLING OPERATION ALa TIMER MODE Continuous No timer setting available SETTING TEMP 24 C 75
46. t by referring to Installation Manual or Data amp Technical Manual Check Point 2 Check external cause at Indoor and Outdoor Voltage drop or Noise Instant drop Check if there is a large load electric apparatus in the same circuit Momentary power failure Check if there is a defective contact or leak current in the power supply circuit Noise Check if there is any equipment causing harmonic wave near electric line Neon bulb or electric equipment that may cause harmonic wave Check the complete insulation of grounding Check Point 3 Check Electrical Components Check the voltage of power supply gt gt Check if AC103 127V appears at Outdoor Unit Terminal L Check Fuse in Main PCB gt gt If Fuse is open check if the wiring between Terminal and Main PCB is loose replace Fuse Check Varistor in Main PCB gt gt f Varistor is defective there is a possibility of an abnormal power supply Check the correct power supply and replace Varistor Upon checking the normal power supply replace Varistor gt If the symptom does not change by above Check 3 replace Main PCB 02 22 Forecast of Cause 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 Are these Indoor Unit Outdoor Unit and Remote Control suitable model numbers to connect gt gt If there is some
47. t current does not exceed the current limit value that was set up with the outdoor temperature The compressor frequency returns to the designated frequency of the indoor unit at the time when the frequency becomes lower than the release value Table 21 Current release operation value Release value Heating Heating AOU09RL2 AOU12RL2 OT Control Release OT Control Release 10 5 10 0 11 0 10 5A 17 C 62 6 F P 17 C 62 6 F 12 0 11 5 12 0 11 5 12 53 6 F 12 C 53 6 F 12 5 12 0 14 0A 13 5A 5 C 41 F _ 5 C 41 F 12 5 12 0A 14 5A 13 5A OT Outdoor Temperature OT Outdoor Temperature Cooling Cooling AOUOSRL2 AOU12RL2 OT Control Release OT Control Release 8 0A 7 5A 9 0 8 5A 46 C 114 8 F 46 C 44488Fl n 9 0A 8 5A 10 0A 9 5A 40 C 104 F 40 C 104 h 12 0A 11 5A 12 0A 11 5A OT Outdoor Temperature OT Outdoor Temperature 01 16 3 ANTIFREEZING CONTROL Cooling and Dry mode The compressor frequency is decrease on cooling amp dry mode when the indoor heat exchanger temperature sensor detects the temperature lower than Temperature I Then the anti freezing control is released when it becomes higher than Temperature I Table 22 Anti freezing Protection Operation Release Temperature
48. ting the Auto Restart Enable or disable automatic system restart after a power outage Factory setting Setting Description Function Number Setting Value Yes 00 40 No 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 Factory setting Setting Description Function Number Setting Value A 00 44 01 B C 02 D 03 03 02 3 1 2 Procedures to change the Function Setting for wireless RC 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 Settings will not be changed if invalid numbers or setting values are selected E PREPARATION Turn on the power By turning on the power indoor units so make sure the piping air tight test and vacuuming have been conducted before turning on the power Also check again to make sure no wiring mistakes were ma
49. troller PCB When the condition that actual frequency of Indoor Fan is Indoor unit Fan motor 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 Indoor unit fan motor failure 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 gt gt Fan or Bearing is abnormal replace it Check Point 2 Check ambient temp around motor Check excessively high temperature around the motor If there is any surrounding equipment that causes heat gt gt Upon the temperature coming down restart operation Check Point 3 Check Indoor unit fan motor Check Indoor unit fan motor PARTS INFORMATION 4 gt gt If Indoor unit fan motor is abnormal replace Indoor unit fan motor Check Point 4 Replace Controller PCB gt If Check Point 1 3 do not improve the symptom replace Controller PCB 02 08 Trouble shooting 7 Indicate or Display OUTDOOR UNIT Error Method Outdoor unit main PCB model Refer to error code table information error or communication error Detective Actuators Detective details Outdoor unit Main PCB 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 Exter
50. utdoor fan speed after the defrost AOU09RL2 ee AOU12RL2 01 06 7 LOUVER CONTROL 1 VERTICAL LOUVER CONTROL Function Range Each time the button is pressed the air direction range will change as follow OOOO 00 0 Fig 8 Air Direction Range Types of Air flow Direction Setting During Cooling Dry modes 5 0 6 CD During Heating 1 2 The Remote Controller s display does not change 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 Cooling Dry mode Horizontal flow Heating mode Downward flow If you set the angle to position 5 for more than 30 minutes in Cooling or Dry mode they automatically return to position 2 In Cooling or Dry mode if the angle is set to position C2 for many hours condensation may be formed and the drips may wet your property 2 ADJUST THE RIGHT LEFT LOUVERS Move the Right Left louvers to adjust air flow in the direction you prefer Right Left Louvers Knob 2 places 3 SWING OPERATION To select Vertical Airflow Swing Operation When the swing signal is received from the remote controller the vertical louver starts to swing Table10 Swinging Range Cooling Dry mode Fan mode 0 4 Heating mode Fan mode 5 7 The SWING operation may stop temporarily when the air conditione
51. value Temperature TD eed e Resistance Value kQ 80 C 90 100 C 110 C 120 C Resistance Value 27 26 18 40 12 68 8 909 6 375 4 639 3 430 2 573 1 956 gt If Thermistor is either open or shorted replace it and reset the power OK Check Point 3 Check voltage of Main PCB DC5 0V Make sure circuit diagram of outdoor unit and check terminal voltage at Thermistor DC5 0V THERMISTOR PIPE BLACK WWD BLACK BLACK IWS BLACK THERMISTOR DISCHARGE THERMISTOR OUTDOOR SVS BLACK BY Oo ho gt P If the voltage does not appear replace Main PCB 02 12 Trouble shooting 11 OUTDOOR UNIT Error Method Outdoor unit Heat Ex liquid temp Refer to error code table sensor error Indicate or Display Detective Actuators Detective details 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 Forecast of Cause 1 Connector connection failure 2 Thermistor failure Main PCB failure Check Point 1 Check connection of Connector Check if connector is removed Check erroneous connection Check if thermistor cable is open gt gt Upon correcting the removed connector or mis wiring reset the power Check Point 2 Remove co
52. ymptom change Controller PCB and Indicator PCB 02 05 Trouble shooting 4 Indicate or Display INDOOR UNIT Error Method Refer to error code table Room temp 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 Connector connection failure 2 Thermistor failure Controller PCB failure Check Point 1 Check connection of Connector Check if connector is removed Check erroneous connection Check if thermistor cable is open gt gt Upon correcting the removed connector or mis wiring reset the power Check Point 2 Remove connector and check Thermistor resistance value Thermistor Characteristics Approx value Temperature Resistance Value Temperature Resistance Value kQ P If Thermistor is either open or shorted replace it and reset the power Check Point 3 Check voltage of Controller PCB DC5 0V Make sure circuit diagram of indoor unit and check terminal voltage at Thermistor DC5 0V THERMISTOR PIPE HYD BLACK BLACK CAA BLACK BLACK THERMISTOR ROOM TEMP gt If the voltage does not appear replace Controller PCB 02 06 Trouble shooting 5 Indicate or Display INDOOR UNIT Error Method Indoor unit Heat Ex middle temp Refer to error code table sensor error Det

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