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Inverter Training

Inverter Training. Service Training Program. Field Failure Example of Past Models Heating capacity decrease at low ambient temperature Temperature difference of ON/OFF control Starting Current Air Conditioner Inverter Composition Inverter Module Composition What is Inverter ?

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Inverter Training

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  1. InverterTraining

  2. Service Training Program Field Failure Example of Past Models Heating capacity decrease at low ambient temperature Temperature difference of ON/OFF control Starting Current Air Conditioner Inverter Composition Inverter Module Composition What is Inverter ? Principle of rotation control Inverter control system ASY12L Features Block Diagram Power supply flow chart Circuit description Indoor unit Micon control (assorted) Outdoor unit Micon control (assorted) Error Information Memory function of Error Trouble shooting AWY14L Features Block Diagram Circuit description/Power supply flow chart Additional feature explanation Indoor unit Micon control (assorted) Outdoor unit Micon control (assorted) Error information Memory function of Error Trouble shooting • FujitsuGENERALCustomerService

  3. The comfortable improvement The mainly purpose of air-conditioner is to offers the comfortable feeling to the residence air space, but there’re still some basical problem left in the conventional heat pump air-conditioner. However ,by using the inverter, those problem can be solved. • FujitsuGENERALCustomerService

  4. Problem 1 Unit’s heating capacity decrease in low temperature condition. Improved by the inverter Raise the capacity by increase the revolution of compressor. • FujitsuGENERALCustomerService

  5. Problem 2 Require long period of time to reach set temperature. (About 40 minutes) Conventional Model Inverter Room temperature (deg.) Room temperature (deg.) Set temperature Set temperature Revolution of COMPRESSOR Revolution of COMPRESSOR 40 min. Time 20 min. Time *Comparison with our 24000BTU Model Improved by the inverter By spinning compressor motor at high revolution since start condition will shorten the room temperature rise-time from the common model. (About 20 minutes) • FujitsuGENERALCustomerService

  6. Problem 3 Room temperature drop rapidly when the compressor turn OFF which result in the wide range of changed temperature that can be sensed by human body and may cause unpleasant feeling. Conventional Model Inverter Set temperature Set temperature Room temperature (deg.) Room temperature (deg.) 3 deg. 1 deg. ON Revolution of COMPRESSOR ON ON Revolution of COMPRESSOR OFF OFF Time Time Improved by the inverter The range of changed room temperature is small. Because after reached the set temp,compressor will not OFF to control the temperature. But will maintain temperature by decreasing or increasing the revolution.

  7. Other characteristics -Low compressor starting current. • FujitsuGENERALCustomerService

  8. Inverter part composition outline Indoor unit control AC Thermistor Remote control Fan motor Indicator Diode bridge Active Filter Module Capacitor Indoor unit IPM Main circuit control Thermistor Fan motor 4way valve Compressor Outdoor unit

  9. The fixed direct current voltage The variable voltage Variable frequency Single Phase current CONTROL MODULE’S COMPOSITION OUTLINE Diode Bridge Active filter Module (AFM) Integrated power Module (IPM) b AC Power supply d Coil Motor Capacitor c a e CONTROL CIRCUITE (MICRO PROSSSOR) CONVERTER POWER FACTOR IMPROVING CIRCUITE INVERTER a) The minus electric potential is changed to the plus electric potential by using Diode Bridge which is connected to AC power supply (Full-wave rectification). b) The coil keeps the constant variation of the current and removes the pulsation of the rectified DC current. c) Active Filter Module suppresses the high frequency harmonic wave that is occurred during the rectification and improves the power factor. d) By using the smoothing capacitor, the output voltage from the active filter module is converted to the stable DC voltage. e) At IPM, the circuit which compose of 6 transistors switches the output voltage from the active filter module, and the supply voltage to the motor is varied by either PWM control or PAM control.

  10. What’s Inverter ? Inverter and Converter Converter Device to convert alternating current to direct current. Inverter Device to convert direct current to alternating current In general term, We call Inverter for device that converts normal alternating current from home / industrial-used power supply to voltage / frequency adaptable from alternating current. Outline principle of inverter 1. Rectifying the alternating current and flattening the output to derive direct currentpower supply. 2. Using the electrical equipment such as the semi-conductor to do switching and chopping those derived direct current to make the alternating current at requiredfrequency and voltage. Advantages of the inverter air-conditioner Energy saving - Comparing to the common ON - OFF controlled compressor, the inverter controlled compressor can be able to run at the proper revolution to provide the best efficiency and reduce losses. - When the maximum capacity is not required, the compressor revolution will decrease. These means the input power decrease too, which result in the increasing of unit’s efficiency. • FujitsuGENERALCustomerService

  11. + + S1 S3 S5 S1 S3 S5 U U S4 S6 S2 V W S4 S6 S2 V W - - + P S1 S3 S5 U MOTOR S4 S6 S2 V W - N By changing the ON-OFF cycle of the switch, the rotation of the motor can be varied at the desired frequency. If the DC voltage is changed, the input voltage of the motor can be also varied. Practically, the motor is rotated by using 6pcs of transistors instead of a switch, and the transistor is alternately turned ON-OFF. + S1 S3 S5 U S4 S6 S2 V W - Basic Circuit of 3 Phase Inverter When the switches SW1 through SW6 are turned ON and OFF in order of the figure, the equal interval pulse wave is obtained between U-V, V-W and W-U, and the pulse wave 3 phase AC voltage is appeared on the motor. time S1 S2 S3 S4 S5 S6 ON OFF U – V V – W W – U

  12. Type of Inverter Control System AC Inverter PWM Control System The motor needs a sign wave input. The pulse width of the DC voltage from the converter is varied and cut out by the switching at the inverter as shown in the figure, and the motor rotation is controlled by the quasi-sign wave that is created by varying it to the desired average voltage. DC Inverter PWM Control System By using a brush less motor, the DC voltage pulse width from the converter is varied and cut out by the switching of the inverter, and the DC motor rotation is controlled by varying it to the desired average voltageIt differs from AC compressor and the pulse becomes the equal interval waveform PAM Control System By using a brush less motor, the motor rotation is controlled by applying a variable voltage of DC140V through 390V to the motor winding directly with the voltage booster which is composed of a reactor and a switching component.

  13. ASY12LSAC / AOY12LSAC Major feature of the product WALLMountedSingleInverter Energy saving DC Inverter (R410A) PWM system E-Chassis (Front folding door) Refrigerant used : R410A Compressor Hermetic type,4 pole, 3 phase , DC brushles motor Built-in Outdoor Unit Active Filter Module CompactRemotecontrol COILDRYOperation No additional charging required up to 15m. • FujitsuGENERALCustomerService

  14. DC 15V Input DC 12V Input DC 5V Input AC 230V ON / OFF Control ASY12LSAC / AOY12LSAC Indoor unit control PCB Thermistor Room temperature Pipe temperature Indicator PCB Serial Signal circuit Louver Motor Power Supply circuit Micro processor Indoor FAN motor Buzzer Indoor unit Diode bridge PWB Thermistor Discharge temperature Outdoor temperature Pipe temperature Outdoor unit control PCB Active Filter Module Capacitor Power Supply circuit IPM Module Serial Signal circuit 4 Way Valve Compressor Micro processor E EV Valve LED Outdoor Fan Motor Outdoor unit • FujitsuGENERALCustomerService

  15. Circuit Diagram ASY12LSAC Pdf file

  16. Circuit Description of ASY12LSAC / AOY12LSAC Power Supply Circuit Varistor When an abnormal voltage is applied between the terminal of varistor (VA101), it shorts out and the circuit protection is carried out. Surge Absorber The surge absorber is a protection part as same as varistor for the electronic parts of outdoor unit against abnormal voltage such as lightening and it discharges the lightening surge. Noise Filter A lot of different kinds of pulse noise come out of inverter since it Controls transistors by switching. Noise filter protects these noises to come out of inverter by absorbing the noise with the coil and bypassing the high harmonic frequency with capacitor. Coil It improves the primary side commercial power supply wave form (power factor) by removing the power supply harmonic frequency current and performs the insulation protection.

  17. Circuit Description of ASY12LSAC / AOY12LSAC Current Detection Circuit It is the circuit which always detects the input current. The compared value to 5 V standard voltage is input to the micon and detects CT error so that the supplied current to the circuit does not exceed the set up value. (Total current value decrease of the outdoor unit is detected during the compressor operation.) Diode Bridge It conducts the full-wave rectification of the AC voltage that passed through the power factor improvement filter.

  18. Circuit Description of ASY12LSAC / AOY12LSAC Active Filter Module The input current is corrected by the micon inside the module and the boosting chopper circuit, and the waveform with 100% of power factor is supplied to the output. It improves the power factor, and controls the power supply harmonic wave current. When compressor is stopped = Input Voltage x Root 2 (Effective Value) When compressor is operated = 380V The target DC voltage is set up by the input voltage and multiplied in comparison with the input DC voltage. The multiplied target current and the input current are compared. The compared value is compacted at with the waveform the oscillator at PMW comparator. The compared signal controls the switching component ON and OFF.

  19. Circuit Description of ASY12LSAC / AOY12LSAC Smoothing capacitor This is used to remove the ripple of DC voltage that is output from the active filter. Switching Transformer By using the switching transformer, the DC input is transferred to the driving power for input output hardware. And its output is fed into the 3 terminal regulator, and the output voltage is used to drive Micon or for data comparison. Oscillator for Micon It creates the timing pulse and clock signal to input and output of t he Micon. Reset Circuit It creates the power ON reset signal for Micon. If noise comes into the input of IC, the Micon may not operate normally.

  20. Circuit Description of ASY12LSAC / AOY12LSAC IPM (Integrated Power Module) It is composed of 6 transistors and drives the motor by high speed switching. The drive voltage signal is transferred to the drive circuit from Micon, and varies the supply frequency to the motor (PWM system) to rotate the motor.

  21. Circuit Description of ASY12LSAC / AOY12LSAC Motor DC Motor (DC Inverter) The rotor of DC compressor motor is made of permanent magnet, and it creates the revolving magnetic field by applying the voltage that is obtained by PAM control to the stator winding. And the pull and repulsion between the rotating magnetic field and the permanent magnet creates the force toward the same direction of the rotating magnetic field, and the rotor rotates. The rotor and the permanent magnet need to be controlled to match up the revolving magnetic field to the polarity. In order to control the positioning detection, there are several types. One is the sensor type that built in the rectifier or Hall Effect Device, and the other type is the one that the positioning detection is done by the reverse power force which is excited at the stator winding by the rotation (Fleming’s Right Hand Rule). The speed of the compressor can be changed by drifting the voltage (PAM control / PWM control). The rotor is made of permanent magnet. No slipping is occurred and the efficiency is good. When measuring the motor frequency by using a clamp meter, the indication is 2time of actual rotation speed since it used 4 pole permanent magnet.

  22. Circuit Description of ASY12LSAC / AOY12LSAC Motor AC Motor AC compressor motor is 3 phase induction motor. Revolving magnetic field is occurred when the voltage that was obtained by PWM control is applied to the stator winding. Then the induction current flow through the rotor and it rotates by the force in the same direction of the revolving magnetic field, by Fleming’s Left Hand Rule. The rotation speed of the compressor can be changed with varying PWM frequency. (Uneven interval PWM) PWM controlled voltage is supplied in 3 phase AC by shifting 120 degree each. The power to electromagnet the rotor is required additionally. Due to the slipping (difference between the rotation speed and magnetic rotation speed), the rotation loss is large.

  23. Circuit Description of AOY9LSAC / AOY12LSAC Serial Communication Circuit In order to operate the outdoor unit based on the indoor unit’s operational conditions, each control signal needs to be transferred from the indoor unit to the outdoor unit. Since this control has many kinds of signals, it uses the serial signal transfer system that transfers various control signals onto 1 set of transfer line. Timing to send/receive signal is controlled by the serial signal that is synchronized to the power supply frequency.

  24. Serial signal control method The serial signal is used for exchange the information between the indoor unit and inverter unit during operating. The contents of the information are showed in the TABLE1 Serial signal consists of 48bit [ INFORMATION 1 (Serial signal)] and 32bit [ INFORMATION 2 (serial reverse signal) ]. INFORMATION 1 Forward Serial signal Indoor Unit Outdoor Unit INFORMATION 2 Reverse Serial signal Example of Serial Signal of ASY24PBA-W/AOY24PMAL

  25. Outline of control by microcomputer ASY12LSAC / AOY12LSAC Indoor unit Input Output Micon control specifications Operation mode control Set temperature control Fan control / /Swing control Timer mode /Coil dry control Manual auto operation Outdoor unit power relay control Indoor unit Fan control Louver Stepping motor control Room temperature revise Power Relay ON/OFF control Auto change over Compressor driving frequency change Start circuit Cooled air prevention Over load protection Heating Prevention of icing Air flow direction control Auto defrosting operation Indoor FAN S-HI control Indoor FAN lock prevention Auto restart Test run 3minutes ST 50/60Hz auto change Out door unit power relay Manual auto button Stepping motor Infrared lay signal Indoor unit FAN motor Room temperature Thermister LED Heat exchanger temperature Thermister Buzzer

  26. Microcomputer Control ASY12LSAC / AOY12LSAC Coil Dry – Approx. 18 minutes The following operation starts when Coil Dry button on the remote is pressed. The cycle of [FAN operation for 3 minutes  HEATING operation for 2 minutes ] is repeated 3 times and at last FAN operation is performed for 3 minutes. Indoor Fan Motor is fixed at 900 rpm Louver is horizontal Only LED Coil Dry lights up (It turns off at the end of Coil Dry operation). *** Coil Dry operation is quitted if the operation is stopped or by other operation input. Power Relay ON/OFF control If the operation mode is stopped on heating mode, the power relay is kept on for 48 hours from then. Upon 48 hours, 48 hour timer is reset, and it is turned ON again. Indoor FAN S-HI control When heating operation is started or selected from other operation mode, the indoor fan mode becomes S-HI if the following condition is met. Set up Temperature : 30 degC Set up Airflow : Hi Continuous Operation(Not Timer operation) Indoor Temperature : Higher than 16 degC, lower than 24 degC Indoor Fan lock prevention Rotation error If the fan motor speed is less than 1/3 of the target speed after 56 seconds of starting Fan operation or selecting. Fan operation from other mode, the operation stops and Error is indicated. LED :(Timer LED 0.1sec. flashing / Operation LED 0.5 sec. 6 times blinking) Lock Error If the fan motor speed is 0 rpm after 56 seconds of starting Fan operation or selecting Fan operation from other mode, the operation stops and Error is indicated. LED : (Timer LED 0.1sec. flashing / Operation LED 0.5 sec. 6 times blinking )

  27. Outline of control by microcomputer ASY12LSAC / AOY12LSAC Outdoor unit Input Output Micon control specifications Operation control Compressor Operation control outdoor FAN motor EEV- valve control Operation control Defrost Active filter control Over current protection of IPM Electric current passing failure protection High pressure passing ascent protection CT abnormal detection Power souse cut off instantaneously detection Compressor location Error Compressor Preheating 3 minutes ST Pre heating 4way valve control Timer short Thermister abnormal detection OUTDOORtemperature Thermister 4wayvalve Cooling : OFF Heating: ON Dry : OFF DISCHARGETEMPERATURE Thermister Compressor It corresponding to the rpm order of the Forward serial signal HeatExchangertemperature Thermister DRIVE CURRENT FANmotor (AC MOTOR) IPM OVER LOAD CURRENT (IPM) EEV valve Internalize (It is set to stipulated pulse of each operating.) SerialSIGNAL(Forward） SerialSIGNAL(Reverse） LED

  28. Microcomputer Control ASY12LSAC / AOY12LSAC EEV Valve Control Initialization When power relay is ON, initial position is set up by the input of the pulse toward closing valve direction. When the operation starts, initial setting pulse of each mode is reset and the opening of the valve can be controlled by adding pulse. VALVE control On cooling / heating / dry operation mode, the opening amount of EEV is controlled to match up the actual exhaust temp. thermistor value toward the targeted exhaust temp., by setting up the targeted exhaust temp. with the micon control which inputs are indoor heat exchanger temperature, outdoor temperature and compressor speed. Pre-heating When the heating operation stops and the power relay is working, it will start in the detection of the heat exchanger temperature. pure-heating is applies feeble electric current to the U and V terminals. Active Filter Control Active filter abnormal voltage detection If DC voltage is detected over 425V or below 80V just before turning ON Active Filter; Compressor and outdoor fan are stopped,by detecting error 3 times, permanent stop is conducted. LED : (Timer LED 0.1sec. flash / Operation LED 0.5sec. 8 times blinking) Between P – N voltage Compressor ON : DC 380V Compressor OFF: (This voltage is an execution value with entry voltage. Supply voltage 240V >>> 273V ) Permanent stop : 0V Active filter Cut off Error While Active Filter is ON, if the voltage detection value becomes less than 180V; Compressor and outdoor fan are stopped. LED : (Timer LED 0.1sec. flash / Operation LED 0.5sec. 8 times blinking) Active Filter Module Error While Active Filter is ON, if the voltage detection value becomes less than 250V; Compressor and outdoor fan are stopped. LED : (Timer LED 0.1sec. flash / Operation LED 0.5sec. 8 times blinking)

  29. Microcomputer Control ASY12LSAC / AOY12LSAC Over current protection of IPM The compressor is stopped if the IPM current becomes operation error during the operation. LED : (Timer LED 0.1sec.flash / Operation LED 0.5sec.5time blinking) Cooling high-pressure rise protection If the outdoor heat exchanger temperature becomes higher than 65degC after 1 minute of compressor start up during the cooling operation: Compressor and Fan Motor stop. LED : (Timer LED 0.1sec. flashing / Operation LED 0.5sec. 7 times blinking) Compressor location Error When the compressor location error (polarity shift) is occurred at location detection circuit: Compressor is restarted after 3ST, and if does not start up 3 times, it becomes permanent stop. LED : (Timer LED 0.1sec. flashing / Operation LED 0.5sec. 5 times blinking) Current trance abnormal detection When the compressor is running higher than 90 rps and the current value detected at the current transformer is abnormal:Compressor and Fan Motor stop. Compressor is restarted after 3ST, and if does not start up 2 times, it becomes permanent stop. LED : (Timer LED 0.1sec. flashing / Operation LED 0.5sec. 5 times blinking)

  30. OPERATION TIMER OPERATION TIMER Example of Indication) Serial Signal Error PRIMARY INDICATION The order of error indication that is memorized is as follows. Primary Indication 1. Insert the AC power plug 2. Start the operation by the remote control. 3. Press TEST button. The defective part is indicated by the continuous blinking in 1 second or 0.1 second of TIMER LED (Serial signal error), and by the number of blinking count of Operation LED. Detailed Error Display Indication 1.At the primary indication. 2.Press TEST button. Operation LED starts to blink in 0.1 second interval. The detail of the defective part is indicated with the number of blinking by TIMER LED. To go back from Detailed Error Display to Primary Error Display, press TEST button. The error indication is effective only 2 minutes 20 seconds after inserting the AC power plug. How to clear the memorized error Press MANUAL AUTO button during the error indication is on. It is cleared with the buzzer (3 seconds).

  31. Error Information ASY12LSAC/ AOY12LSAC Error pdf • FujitsuGENERALCustomerService

  32. Trouble Shooting Flow Check Detailed Error Indication Remove the thermistor which was detected error and check the resistance value. Replace the thermistor. Check if DC5V appears at the connection terminal of the thermistor. Replace the control PCB. TroubleShooting ASY12LSAC/ AOY12LSAC Checking Method Example Error OPERATION LED 3 times flash TIMER LED FLASH 0.1 sec. Outdoor Thermistor Error ! Indoor unit control PCB Indicator PCB Room temperature Thermisutor Micro processor Pipe temperature Thermistor Louver Motor AC Power supply Indoor FAN Serial signal circuit Outdoor unit control PCB Diode bridge PWB Active Filter Module Compressor Power supply IPM Module Discharge temperature Thermistor Serial signal circuit 4 Way Valve Outdoor temperature Thermisutor E EV Valve Micro processor Outdoor Fan Motor Pipe temperature Thermistor • FujitsuGENERALCustomerService

  33. Trouble Shooting Flow Check Detailed Error Indication Check the AC (DC) voltage appear at U,V,W terminal with a good balance. Measure the DC voltage between P and N of IPM. DC:Approx.270V(When compressor is stopped), 380V(When compressor is operating, 0V (at permanent stop) Replace IPM Replace the compressor. TroubleShooting ASY12LSAC/ AOY12LSAC Checking Method Example Error OPERATION LED 5 times flash TIMER LED FLASH 0.1 sec. Compressor location Error ! Indoor unit control PCB Indicator PCB Room temperature Thermisutor Micro processor Pipe temperature Thermistor Louver Motor AC Power supply Indoor FAN Serial signal circuit Outdoor unit control PCB Diode bridge PWB Active Filter Module Compressor Power supply IPM Module Discharge temperature Thermistor Serial signal circuit 4 Way Valve Outdoor temperature Thermisutor E EV Valve Micro processor Outdoor Fan Motor Pipe temperature Thermistor • FujitsuGENERALCustomerService

  34. Trouble Shooting Flow Check Error Indication Check if there is a mistake in cable wiring between Indoor and Outdoor Unit, or any abnormal contact. If a incorrect wiring or defective contact is found: Please be sure to pull out the plug. Measure the AC voltage between N – Ground. Check the serial (forward/reverse) pulse (by using an analog meter) Check 5V at DC5V point on the control PCB Replace the control PCB. TroubleShooting ASY12LSAC/ AOY12LSAC Checking Method Example Error OPERATION LED NORMAL TIMER LED FLASH 0.1 sec. Serial signal Error ! Indoor unit control PCB Indicator PCB Room temperature Thermisutor Micro processor Pipe temperature Thermistor Louver Motor AC Power supply Indoor FAN Serial signal circuit Outdoor unit control PCB Diode bridge PWB Active Filter Module Compressor Power supply IPM Module Discharge temperature Thermistor Serial signal circuit 4 Way Valve Outdoor temperature Thermisutor E EV Valve Micro processor Outdoor Fan Motor Pipe temperature Thermistor • FujitsuGENERALCustomerService

  35. AWY14LSACW / AOY14LSAWC Major feature of the product WALLMOUNTEDSingleInverter CeilingWalltype Energy Saving DC Inverter PWM & PAM system Refrigerant used : R410A UV Disinfection / Deodorant UV Inside Cleaning Minus Ion Operation Indoor / Outdoor Temperature Indication Original Remote Control No additional charge required up to 15m • FujitsuGENERALCustomerService

  36. DC 15V Input DC 12V Input DC 5V input DC 12V input AC input ON / OFF Control DC inverter input DC15V input Input / Output AWY14LSACW/AOY14LSAWC Indoor unit control PCB Indicator PCB Indoor FAN motor Thermistor Room temperature Pipe temperature Louver Motor ×3 Power Supply circuit Diffuser Motor Limit SW 1,2 (Filter L&R) Serial Signal circuit Filter Drive Motor ×2 Micro processor Indoor unit ANION Buzzer UV lump Diode bridge PWB Thermistor Discharge temperature Outdoor temperature Pipe temperature Outdoor unit control PCB Active Filter Module Capacitor Power Supply circuit IPM Module Serial Signal circuit 4 Way Valve Compressor E EV Valve Micro processor Outdoor unit Outdoor Fan Motor

  37. Circuit Diagram AWY14LSACW Pdf file

  38. Outline of control by microcomputer AWY14LSAWC Indoor unit Output Input Indoor unit Micon specifications Operation mode control Set temperature control ECONOMY operation Fan control / Air direction control /Swing control Air clean control /Filter maintenance Temperature MONITOR / Timer mode 2disit 7Segment display /Coil dry control Filter Reset and Manual auto button Energy Save or Normal operation(ECONOMY) Hi power operation Outdoor unit power relay control Indoor unit Fan control Louver Stepping motor control Diffuser motor control Filter drive stepping motor control UV lump control / ANION control (AIR CLEAN) Room temperature revise Auto change over Compressor driving frequency change Start circuit Cooled air prevention Over load protection Heating Prevention of icing Air flow direction (AIR DIRECTION) Auto defrosting operation / Pre heating Indoor FAN S-HI control Indoor FAN lock prevention Auto restart / 3minutes ST 50/60Hz auto change / Test run Indoor unit FAN motor DC motor Manual auto and Filter Reset button Louver motor (×3) Stepping motor Infrared lay signal Diffuser motor Stepping motor Room temperature Thermister Filter drive motor Stepping motor Heat exchanger temperature Thermister UV lump Filter Limit SW 1,2 AN ion Buzzer LED Out door unit power relay

  39. Microcomputer Control AWY14LSAWC ECONOMY OPERATION (Energy Save or Normal) mode control At the maximum output, ECONOMY Operation is approximately 70% of normal conditioner operation for heating and cooling. The set up temperature at Cooling and Heating mode is changed to + 1degC, and the compressor and the fan motor are changed to ECONOMY operational condition. Filter maintenance Operation Press FILTER MAINTENANCE button on the remote control (manually) Based on the accumulated operation hours (Remote setting : either 200hours or 150 hours) the filter cleaning operation is performed automatically. While in operation, the green MAINTENANCE LED is turned on. In case of filter mounting error or detection error of the limit switch, MAINTENANCE LED (green) is turned ON for 1 second and OFF for 1 second. 7 segment indication is not performed. Dust Box Maintenance Warning When the accumulated operation hour becomes 2,000 hours, the operation stops and Filter Cleaning Operation (Automatic / 1 time) is conducted. MAINTENANCE LED (Red) blinks at the same time. When MAINTENANCE LED is blinking, by pressing the filter reset and manual button, the dust box maintenance accumulated hour is reset and turns off the red LED. 2 Digit 7 Segment Display Press Monitor button on remote control and the following is indicated after 60 seconds of starting operation. Outdoor Temperature Indication => Indoor Temperature Indication => No Indication The outdoor temperature indication lasts only 10 seconds and changes to the indoor temperature indication after 10 seconds. When Error is indicated on 2 segment display, the place of 10 shows the primary error indication and the place of 1 shows the detailed error indication.

  40. Microcomputer Control AWY14LSAWC Filter Reset and Manual auto button Press for more than 3 seconds and AUTO Operation is performed. (In case of error indication, error content is cleared.) Press for less than 3 seconds and Dust Box Maintenance Accumulated hour is reset. Hi power operation Heating mode : Compressor and Fan Motor operates under High Power mode until the temperature reaches Set-up temperature +2 degC after 15 minutes of starting High power operation. Cooling mode : Compressor and Fan Motor operates under High Power mode until the temperature reaches Set-up temperature - 2 degC or 30 minutes after starting High power operation.   When operating on High Power mode, Orange LED is turned ON. UV lamp control / Minus Ion Control (Air Cleaning) Air Cleaning is performed by UV unit and Minus Ion Generator. (It operates at Normal Operation or Stop mode (Solo Air Cleaning Function))  UV Unit Power Input : DC13.2V Minus Ion Generator Power Input : DC13V It does not operate while the indoor fan is stopped. Air Flow Direction (Air Direction) Louvers Cooling mode : can be adjusted at 3 steps downward from the horizontal position. Heating mode : can be adjusted at 3 steps upward from the lowest Position Defrost / FAN mode : can be adjusted at 7 steps from the horizontal position. Horizontal Louver Moves to Center Flow, Right Flow, Center Flow, Left Flow.

  41. Outline of control by microcomputer AOY14LSAWC Outdoor unit Input Output Micon control specifications Operation control Compressor Operation control outdoor FAN motor EEV- valve control Operation control Defrost Active filter control Over current protection of IPM Electric current passing failure protection High pressure passing ascent protection CT abnormal detection Power souse cut off instantaneously detection Compressor location detection Compressor Preheating 3 minutes ST 4way valve control Timer short Pre Heating Thermister abnormal detection OUTDOORtemperature Thermister 4wayvalve Cooling : OFF Heating: ON Dry : OFF DISCHARGETEMPERATURE Thermister Compressor It corresponding to the rpm order of the Forward serial signal HeatExchangertemperature Thermister DRIVE CURRENT FANmotor (DC MOTOR) IPM OVER LOAD CURRENT (IPM) EEV valve Internalize (It is set to stipulated pulse of each operating.) SerialSIGNAL(Forward） SerialSIGNAL(Reverse） LED

  42. Microcomputer Control AOY14LSAWC Compressor Operation Control Compressor speed is decided by the compressor speed bit of the serial forward transfer signal, but at the start up, it rotates at 40 rps speed at all time. ASY12L : 56 rps Outdoor Fan Motor Control At Cooling and Heating mode, depending on the compressor speed it rotates at; LO-1, LO-2, Med-1, Med-2, Hi-1, Hi-2. While defrosting or High power operation in the heating mode, it rotates at; S-Hi-1, S-Hi-2. If the IPM current becomes higher than 17A, it rotates at S-Hi-1 (Inverter Temperature Rise Protection). Outdoor Fan Motor Location Error When Location Error is detected during operation LED : (Timer LED 0.1 sec. Flashing / Operation LED 0.5 sec. 5 times blinking) 7 segment indication : 56 Active Filter Control PWM / PAM Control PWM control system is activated when the compressor is controlled at lower than 310V. PAM control system is activated when the compressor is controlled at higher than 310V. Active Filter Abnormal Voltage Detection If over 425V or below 80V of DC voltage is detected just before turning on the active filter, the compressor and the outdoor fan are stopped. By detecting this error for 3 times, it results in the permanent stop. LED : (Timer LED 0.1sec. flashing / Operation LED 0.4 sec. 8 times) 7 segment indication : 83

  43. TroubleShooting AWY14LSAC/ AOY14LSWC Pdf file The main unit does not indicate the error in case of UV lamp cut out and the defective minus ion generator. And the unit operates normally with the blue LED on. So the customer can not notice from outside. How to check the function by a service technician. Remote Control’s service mode is used to troubleshoot the UV lamp and Minus Ion Generator. By pressing SET TEMP. UP and DOWN simultaneously, press ACL button. Then the indication becomes =A . (This means it is in the service mode) Press START/STOP button to scroll in order of A, B, C, D, E, F, No Indication, A. Check the UV lamp by transmitting B-mode signal. If there is UV lamp failure, an alarm will sound. (To demonstrate, remote the lamp connector and show the error !) Minus Ion Generator is checked by E-mode. In case of Minus Ion Generator failure, an alarm will sound. • FujitsuGENERALCustomerService

  44. Trouble Shooting Flow In this case, the detection error of the limit switch ON or OFF can be suspected. Remote the connector of the switch and check the continuity of ON and OFF by a meter. Replace the switch. If DC 12V appears at the connector wire (White): Replace the controller PCB. Error OPERATION LED Normal TIMER LED Normal MAINTENANCE LED flash 1sec. Filter setting ERROR Maintenance LED is blinking but 7 Segment error is not indicated. The unit can be operated. TroubleShooting AWY14LSAC / AOY14LSAC Checking Method Example Room temperature Thermisutor Indicator PCB Indoor unit control PCB Diffuser Motor Pipe temperature Thermistor Louver Motor Micro processor Louver Motor Limit SW Louver Motor AC Power supply Filter Motor Indoor FAN Serial signal circuit ANION UV lump Outdoor unit control PCB Diode bridge PWB Active Filter Module Compressor Power supply IPM Module Discharge temperature Thermistor Serial signal circuit 4 Way Valve Outdoor temperature Thermisutor E EV Valve Micro processor Outdoor Fan Motor Pipe temperature Thermistor • FujitsuGENERALCustomerService

  45. Trouble Shooting Flow Check the remote function and ACL, etc. Check AC input. By pressing MANUAL AUTO button for 3 seconds or more and make sure if the buzzer sounds and the unit operates. Check the power supply. Check the continuity of the thermal fuse. Replace the thermal fuse. Check DC5V of CN5. Replace the indicator PCB. Replace the controller PCB. TroubleShooting AWY14LSAC / AOY14LSAC Checking Method Example Error OPERATION LED OFF TIMER LED OFF MAINTENANCE LED OFF Remote control does not work Room temperature Thermisutor Indicator PCB Indoor unit control PCB Diffuser Motor Pipe temperature Thermistor Louver Motor Micro processor Louver Motor Limit SW Louver Motor AC Power supply Filter Motor Indoor FAN Serial signal circuit ANION UV lump Outdoor unit control PCB Diode bridge PWB Active Filter Module Compressor Power supply IPM Module Discharge temperature Thermistor Serial signal circuit 4 Way Valve Outdoor temperature Thermisutor E EV Valve Micro processor Outdoor Fan Motor Pipe temperature Thermistor • FujitsuGENERALCustomerService

  46. Trouble Shooting Flow It is considered that either fan motor is not rotating or DC voltage is not supplied from the control PCB. Check DC12V between the connector 3 – 4. If the connector voltage is normal, replace the fan motor. Error OPERATION LED 6 times flash TIMER LED FLASH 0.1 sec. Indoor Fan Motor lock Error Replace Controller PCB TroubleShooting AWY14LSAC / AOY14LSAC Checking Method Example Room temperature Thermisutor Indicator PCB Indoor unit control PCB Diffuser Motor Pipe temperature Thermistor Louver Motor Micro processor Louver Motor Limit SW Louver Motor AC Power supply Filter Motor Indoor FAN Serial signal circuit ANION UV lump Outdoor unit control PCB Diode bridge PWB Active Filter Module Compressor Power supply IPM Module Discharge temperature Thermistor Serial signal circuit 4 Way Valve Outdoor temperature Thermisutor E EV Valve Micro processor Outdoor Fan Motor Pipe temperature Thermistor • FujitsuGENERALCustomerService

  47. Cooling Heating BASIC REFRIGERATING CYCLE Evaporator 4- way valve Strainer Light color :Gus Dark color :Liquid Arrow(small): Low pressure Arrow(large): High pressure Accumulator Capillary tube Compressor Heat exchanger

  48. Trouble Shooting Abnormal electric parts Mistake operation LED unusual flashing. The power supply is not turned on. The indoor fan does not rotate. The outdoor fan does not rotate. The compressor does not rotate. The system does not operate at all. Remote control does not operate. Water leakage. Mistake installation work Trouble of pipe connection. Trouble of electric wiring. Trouble of draining. The refrigerating cycle is not normal The room does not get cool enough. The room does not get warm enough. Effect of environment Others Change in surroundings in environment Feature in region(dryness, salt damage, and humidity) Noise or vibration sound come out. Water leakage. By asking the customer the defective condition. Defective condition (Sudden, Just after Installation, After Repair, etc.) Is the trouble always happen or intermittently happen?

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