Fujitsu AOU09RL2 Service Instructions Manual Download

Page: 21 / 62

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 .

When the discharge temperature becomes lower than Temperature , the protection control of the

compressor frequency will be released.

When the discharge temperature becomes higher than Temperature , the compressor is stopped

and the indoor unit body Operation lamp and Timer lamp starts blinking.

104°C

(219.2°F)

101°C

(213.8°F)

110°C

(230°F)

(Table 20 : Discharge temperature over rise prevension control / Release temperature)

Temperature

2. CURRENT RELEASE CONTROL

The compressor frequency is controlled so that the outdoor unit input 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 )

01-16

[ Heating ]

OT : Outdoor Temperature

[ Cooling ]

AOU09RL2

OT (Control / Release)

8.0A / 7.5A

9.0A / 8.5A

12.0A / 11.5A

C (114.8°F)

40°

C (104°F)

C (114.8°F)

40°

C (104°F)

OT : Outdoor Temperature

AOU09RL2

OT (Control / Release)

10.5A / 10.0A

12.0A / 11.5A
12.5A / 12.0A

12.5A / 12.0A

17°C (62.6°F)

12°

C (53.6°F)

5°

C (41°F)

17°C (62.6°F)

12°

C (53.6°F)

5°

C (41°F)

[ Heating ]

OT : Outdoor Temperature

[ Cooling ]

AOU12RL2

OT (Control / Release)

9.0A / 8.5A

10.0A / 9.5A

12.0A / 11.5A

OT : Outdoor Temperature

AOU12RL2

OT (Control / Release)

11.0A / 10.5A

12.0A / 11.5A

14.0A / 13.5A

14.5A / 13.5A

Summary of Contents for AOU09RL2

Page 1: ...SPLIT TYPE ROOM AIR CONDITIONER WALL MOUNTEDtype Models Indoor unit Outdoor unit INVERTER SERVICE INSTRUCTION R410A ASU09RL2 ASU12RL2 AOU09RL2 AOU12RL2 ...

Page 2: ...NUAL AUTO OPERATION Indoor unit body operation 12 AUTO RESTART 14 FORCED COOLING OPERATION 15 COMPRESSOR PREHEATING 16 ECONOMY OPERATION 01 01 01 02 01 02 01 03 01 04 01 06 01 07 01 08 01 09 01 11 01 11 01 11 01 12 01 12 01 12 17 POWERFUL OPERATION 01 12 19 OFF DEFROST OPERATION CONTROL 18 DEFROST OPERATION CONTROL 01 13 01 15 20 VARIOUS PROTECTIONS 01 16 01 11 2 TROUBLE SHOOTING 2 1 ERROR DISPLAY...

Page 3: ...DATA 3 1 FUNCTION SETTING 3 1 1 INDOOR UNIT 3 1 2 Procedures to change the Function Setting for wireless RC 03 01 03 01 03 03 3 2 Thermistor Resistance Values 3 2 1 INDOOR UNIT 3 2 2 OUTDOOR UNIT 03 06 03 06 03 06 ...

Page 4: ......

Page 5: ...1 DESCRIPTION OF EACH CONTROL OPERATION R410A WALL MOUNTED type INVERTER ...

Page 6: ...en 2 C 4 F to 2 5 C 5 F of the setting temperature the compressor frequency is controlled within the range shown in Table1 However the maximum frequency is limited in the range shown in Fig 1 based on the indoor fan mode and the outdoor temperature If the room temperature is some degrees lower than a set temperature the compressor will be stopped ASU12RL2 A zone 96rps 61rps 51rps 33rps B zone 96rp...

Page 7: ...quency range 01 02 Minimum frequency Maximum frequency AOU09RL2 AOU12RL2 18rps 120rps 80rps 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 frequ...

Page 8: ...er than auto changeover operation NO NO Thermostat remains in OFF state for 6 minutes or longer System stops or operation command other than auto changeover operation YES YES 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 ac...

Page 9: ... TR Room temperature Ts Setting temperature TR Ts 2 C 4 F 1 C 2 F TR Ts 2 C 4 F TR Ts 1 C 2 F TR Ts 2 5 C 5 F 1 5 C 3 F TR Ts 2 5 C 5 F TR Ts 1 5 C 3 F Hi mode Me mode Lo mode 1 Fan speed Table 6 Indoor fan speed Operation mode Air flow mode Speed rpm Cooling Fan Heating Dry X zone 700 J zone 600 X zone 700 J zone 600 ASU09RL2 ASU12RL2 4 DRY OPERATION Refer to the Table 6 During the dry mode opera...

Page 10: ... Lo mode Me mode Me mode 42 C 108 F 30 C 86 F 34 C 93 F When the Indoor heat exchanger temp rises When the Indoor heat exchanger temp drops When the Indoor heat exchanger temp rises When the Indoor heat exchanger temp drops Hi or setting Fan mode Me or setting Fan mode Lo or setting Fan mode Cool air prevention 39 C 102 F 37 C 99 F 37 C 99 F 32 C 90 F 28 C 82 F S Lo Switch the airflow Auto at cool...

Page 11: ...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 8 Type of Motor Zone Cooling Heating AOU09RL2 900 650 470 730 470 Y 730 650 470 860 760 470 860 470 380 730 470 360 360 150 210 150 380 280 280 200 Z F G Y Z F G AOU12RL2 900 ...

Page 12: ...g The Remote Controller s display does not change Use the air direction adjustments within the ranges shown above If you set the angle to position for more than 30 minutes in Cooling or Dry mode they automatically return to position In Cooling or Dry mode if the angle is set to position for many hours condensation may be formed and the drips may wet your property Range Heating mode Fan mode The SW...

Page 13: ...uency Frequency Frequency Frequency Frequency Frequency Frequency Frequency Frequency Frequency Time Time Time Time Time 80sec 140sec 200sec Time AOU09RL2 AOU12RL2 78rps 78rps Frequency Time 6 Frequency Time 6 78rps 56rps 74rps 87rps 97rps 108rps 119rps 380sec 440sec 440sec 60sec 100sec 140sec 200sec 410sec 350sec 3 LIMITATION OF COMPRESSOR FREQUENCY BY OUTDOOR TEMPERATURE The minimum compressor f...

Page 14: ...n Operation mode Stop mode Set time of timer The program timer allows the OFF timer and ON timer to be used in combination one time Operation mode 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 com...

Page 15: ...ration 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 After that the setting temperature is not changed and the operation is stopped at the time of timer setting Ts 1 C 2 F 2 C 4 F Set 60min In the heating operation mode When the sleep timer is set the setting temperature is decreased 1 C 2 F It decrea...

Page 16: ...n 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 12 AUTO RESTART 13 MANUAL AUTO OPERATION Indoor unit body operation When the remote contr...

Page 17: ...MY 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 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 compress...

Page 18: ...n time is less than 10 minutes the OFF number of the compressor is counted If any defrost operated the compressor OFF count is cleared Normal defrost Compressor integrating operation time Less than 25 minutes More than 25 minutes Does not operate Outdoor heat exchanger temp 17 C 1 4 F at outside air temp 10 C 14 F Outdoor heat exchanger temp Outside air temp 7 C 44 6 F or Outdoor heat exchanger te...

Page 19: ...nutes Defrost end Outdoor HEX temp Below 17 C 1 4 F Outdoor HEX temp Outside air temp Below 7 C 44 6 F or Outdoor HEX temp Below 20 C 4 F Integrating defrost Defrost Indicator Operation lamp 7 sec ON 2 sec OFF Defrost start Normal defrost Outside air temp 10 C Outside air temp 10 C Compressor OFF count 40 times Less than 10min Compressor integrating operation Over 240 min Outdoor heat exchanger te...

Page 20: ...tion 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 2 OFF DEFROST END 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 In heating operation the outdoor heat exchanger temperature is less than 4 C 24 8 F compressor co...

Page 21: ... prevension control Release temperature Temperature Temperature Temperature 2 CURRENT RELEASE CONTROL The compressor frequency is controlled so that the outdoor unit input 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 r...

Page 22: ...erformed 5 HIGH TEMPERATURE RELEASE CONTROL HEATING MODE 01 17 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 1 When the temperature rises 2 When the temperature drops 4 C 39 2 F 7 C 44 6 F 13 C 55 4 F Temperature Temperature On heating mode the compressor frequency is controlled as following based on the detection value of the indoor heat exchang...

Page 23: ...2 TROUBLE SHOOTING R410A WALL MOUNTED type INVERTER ...

Page 24: ... 1 times 5 times Outdoor unit main PCB model information error or communication error Continuous 2 times 6 times Continuous Continuous 4 times 7 times 6 times 1 times Continuous 7 times 3 times Continuous 7 times 4 times Continuous PFC circuit error Discharge temp sensor error Outdoor unit Heat Ex liquid temp sensor error Outdoor temp sensor error 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Conti...

Page 25: ...ave Check Point 2 Check Connection Check any loose or removed connection line of Indoor unit and Outdoor unit If there is an abnormal condition correct it by referring to Installation Manual or Data Technical Manual Check Point 3 Check the voltage of power supply Check the voltage of power supply Check if AC103V AC115V 10 127V AC115V 10 appears at Outdoor Unit Terminal L N Check Point 4 Check Seri...

Page 26: ...loose or removed connection line of Indoor unit and Outdoor unit If there is an abnormal condition correct it by referring to Installation Manual or Data Technical Manual Check Point 3 Check the voltage of power supply Check the voltage of power supply 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 Seria...

Page 27: ...ar the power cable Neon light bulb or any electronic equipment which causes harmonic wave 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 Rewri...

Page 28: ...tive 60 or more seconds 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 Point 2 Replace Controller PCB If Check Point 1 do not improve the symptom change Controller PCB and Indicator PCB Check ON OFF switching operation by using a meter If Manual Auto Switch is disabled on off switc...

Page 29: ...rcuit is detected 1 Connector connection failure 2 Thermistor failure 3 Controller PCB failure Check if connector is removed Check erroneous connection Check if thermistor cable is open Upon correcting the removed connector or mis wiring reset the power Thermistor Characteristics Approx value If Thermistor is either open or shorted replace it and reset the power Make sure circuit diagram of indoor...

Page 30: ...removed Check erroneous connection Check if thermistor cable is open 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 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 i...

Page 31: ...fan is caught dropped off or locked motor If Fan or Bearing is abnormal replace it Check excessively high temperature around the motor If there is any surrounding equipment that causes heat Upon the temperature coming down restart operation When the condition that actual frequency of Indoor Fan is below 1 3 of target frequency is continued more than 56 seconds 02 08 Check Point 4 Replace Controlle...

Page 32: ...e Check Point 1 1 Reset Power supply and operate Does Error indication show again Check Point 1 2 Check external cause 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 Change Main PCB 02 09 Indicate or Display Refer to error code table When model information of EEPR...

Page 33: ... symptom change Main PCB 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 equipm...

Page 34: ...1 Replace Main PCB Outdoor unit Main PCB 1 Main PCB failure Change Main PCB Trouble shooting 9 OUTDOOR UNIT Error Method Trip terminal L error Indicate or Display Refer to error code table When the signal from FO terminal of IPM in Main PCB is L 0V while the compressor stops ...

Page 35: ...ous connection Check if thermistor cable is open 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 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 term...

Page 36: ...r is removed Check erroneous connection Check if thermistor cable is open 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 If Thermistor is either open or shorted replace it and reset the power 02 13 Indicate or Display Refer to error code table Check Point 3 Check Point ...

Page 37: ...thermistor cable is open 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 If Thermistor is either open or shorted replace it and reset the power 02 14 15 C 5 F 20 C 4 0 F 35 C 95 F 5 184 40 C 104 F 4 216 45 C 113 F 3 451 50 C 122 F 2 841 55 C 131 F 30 C 86 F 25 C 77 F 10 ...

Page 38: ...ternal cause 3 Main PCB failure 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 ground...

Page 39: ...Replace Main PCB OK Check Point 1 Check connections of Outdoor unit electrical components 1 Defective connection of electric components 2 Outdoor heat exchanger clogged 3 Compressor failure 4 Main PCB failure Check if connector is removed Check if the terminal connection is loose Check erroneous connection Check if cable is open Upon correcting the removed connector or mis wiring reset the power C...

Page 40: ...ck if cable is open Upon correcting the removed connector or mis wiring reset the power Refer to PARTS INFORMATION 2 For Compressor Terminal Main PCB 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 ...

Page 41: ... Voltage of Main PCB Check outdoor unit circuit diagram and the voltage Measure at Main PCB side connector If the voltage is not correct replace Main PCB 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 time...

Page 42: ...enoid coil and 4 way valve Remove CN30 from PCB and check the resistance value of coil Resistance value is 1 88k 2 29k at 20 C 68 F If it is Open or abnormal resistance value replace Solenoid Coil 02 19 Cooling or Dry operation Indoor heat exchanger temp Room temp 10degC 20 F Heating operation Indoor heat exchanger temp room temp 10degC 20 F If the same operation is repeated 5 times the compressor...

Page 43: ... exchanger Check for foreign object at heat exchanger Check if fan can be rotated by hand Motor check PARTS INFORMATION 5 Check Point 2 Check the capillary tube strainer Check Point 5 Check the refrigerant amount Leak check Capillary tube Strainer before Capillary clogging check Check Point 2 Check the capillary tube strainer If the 3 way valve gas side was closed open the 3 way valve gas side and...

Page 44: ...ective 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 02 21 2 3 TROUBLE SHOOTING WITH NO ERROR CODE Check Point 3 Check Electrical Components YES YES NO Check the voltage of power supply Check if AC103 127V appea...

Page 45: ...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 the voltage of power supply Check if AC103 127V appears at Outdoor Unit Terminal L N Check Fuse in Main P...

Page 46: ...t by referring to Installation manual and Data Technical Manual Turn off Power and check correct followings Is there loose or removed communication line of Indoor Unit and Outdoor Unit 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 an...

Page 47: ...at obstruct the air flow route Check clogged Heat Exchanger Is the Valve open Is capacity of Indoor unit fitted to room size Any windows open or direct sunlight Check connection pipe specified pipe length Pipe diameter Check any loose or removed communication line If there is an abnormal condition correct it by referring to Installation Manual or Data Technical Manual Check if Strainer is clogged ...

Page 48: ...on grille and front panel normal Is Fan broken or deformed Is the screw of Fan loose Is there any object which obstruct the Fan rotation Is Main unit installed in stable condition Is Fan guard installed normally Check if vibration noise by loose bolt or contact noise of piping is happening Is Compressor locked Check Compressor PARTS INFORMATION 1 2 Water Leaking 1 Erroneous installation 2 Drain ho...

Page 49: ...r due to clogged dirt or less oil Replace Compressor Replace Compressor Replace Compressor Stops soon after starting up Is there open or loose connection cable Is Gas pipe valve open Low pressure is too low Check if Refrigerant is leaking Recharge Refrigerant Check if capillary tube strainer is clogged PARTS INFORMATION 3 If there is no failure the defect of Compressor can be considered Compressio...

Page 50: ...ter Compressor Check terminal connection of Compressor loose or incorrect wiring Check winding resistance of each terminal If the resistance value is 0 or infinite replace Compressor If the symptom does not change with above Check 1 2 replace Main PCB 02 27 S V R U RED C W BLACK Terminal cover opened WHITE Resistance Value 1 3 at 20 C 68 F ...

Page 51: ... 4 5 at 20 C Outdoor unit Electronic Expansion Valve EEV Check connection of connector CN40 Loose connector or open cable Remove connector check each winding resistance of Coil If Resistance value is abnormal replace EEV Remove Connector and check Voltage DC12V If it does not appear replace Main PCB Turn on Power and check operation noise If an abnormal noise does not show replace Main PCB When Va...

Page 52: ...DC voltage Vm No function No function Earth terminal GND Control voltage Vcc Speed command Vsp Feed back FG SERVICE PARTS INFORMATION 4 Check Point 1 Check rotation of Fan Indoor unit fan motor 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 Cir...

Page 53: ......

Page 54: ...3 APPENDING DATA R410A WALL MOUNTED type INVERTER ...

Page 55: ... 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 Setting Value Standard Slightly lower control Lower control Warmer control 30 00 01 02 03 1 2 Cooling Room Tempe...

Page 56: ...art 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 Factory setting Setting Description Function Number Setting Value A B C D 44 00 01 02 03 1 5 Remote controller signal code Change the indoor unit Signal Code depending on the remote controllers ...

Page 57: ...button to enter the function setting mode 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 made before turning on the power 3 1 2 Procedures to change the Function Setting for wireless RC STEP 1 Setting the Remote controller Signal Code 1 ...

Page 58: ...e before turning on it again The FUNCTION SETTING doesn t become effective if it doesn t do so 3 Press the SET TEMP buttons to select the setting value Press the MODE button to switch between the left and right digits Function Number 1 Press the SET TEMP buttons to select the function number Press the MODE button to switch between the left and right digits 4 Press the SLEEP button then after you h...

Page 59: ...g 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 REMOTE CONTROLLER SIGNAL CODE SETTING The remote controller resets to signal code when the batteries in the remote controller are replaced If you use a signal code other than signal code reset the signal code after replaci...

Page 60: ...6 30 0 41 33 35 0 33 64 40 0 27 26 45 0 22 33 50 0 18 40 55 0 15 23 60 0 12 68 65 0 10 60 70 0 8 909 75 0 7 518 80 0 6 375 85 0 5 427 90 0 4 639 95 0 3 981 100 0 3 430 105 0 2 965 110 0 2 573 115 0 2 239 120 0 1 956 0 07 0 09 0 13 0 17 0 22 0 28 0 36 0 45 0 56 0 69 0 84 1 01 1 20 1 39 1 61 1 84 2 07 2 30 2 53 2 75 2 97 3 17 3 35 3 53 3 69 3 83 3 96 4 07 4 17 4 27 4 35 Temp C Resistance k Voltage V...

Page 61: ......

Page 62: ...1116 Suenaga Takatsu ku Kawasaki 213 8502 Japan Mar 2012 Printed in Japan ...

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