1. Manuals
  2. Brands
  3. Fujitsu Manuals
  4. Air Conditioner
  5. R407C
  6. Service manual

Fujitsu R407C Service Manual

Multi air conditioning system for buildings
Hide thumbs
Table of Contents

Advertisement

Quick Links

R407C
Variable Refrigerant Flow System
Multi Air Conditioning System for Buildings
Model : AO90
HEAT RECOVERY TYPE

SERVICE MANUAL

Advertisement

Table of Contents
loading

Related Manuals for Fujitsu R407C

Summary of Contents for Fujitsu R407C

  • Page 1: Service Manual

    R407C Variable Refrigerant Flow System Multi Air Conditioning System for Buildings Model : AO90 HEAT RECOVERY TYPE SERVICE MANUAL...
  • Page 2 Multi Air Conditioning System for Buildings Variable Refrigerant Flow System SERVICE MANUAL R407C...

  • Page 3: Table Of Contents

    CONTENTS 1. TEST RUN 1-1 CHECK ITEMS BEFORE TEST RUN................. 01-01 1-2 CHECK ITEM DURING TEST RUN................01-02 1-3 TEST RUN METHOD....................01-03 1-3-1 TEST RUN FROM OUTDOOR PC BOARD............01-03 1-3-2 TEST RUN FROM REMOTE CONTROLLER............. 01-03 1-4 TEST RUN CONTROL....................01-05 2.

  • Page 4: Table Of Contents

    3-4 EXPANSION VALVES 1 AND 2 CONTROL............... 03-06 3-5 CIRCULATING SAVE AMOUNT CONTROL.............. 03-07 3-6 SOLENOID VALVE 2 CONTROL................03-07 3-7 DEFROSTING CONTROL..................03-08 3-8 OIL RETURN CONTROL.................... 03-09 3-9 OIL RECOVERY CONTROL..................03-10 3-10 PROTECTION FUNCTIONS..................03-11 4. INDOOR UNIT OPERATION 4-1 TIMER CONTROL......................

  • Page 5: Table Of Contents

    06-10 6-5 PRECAUTIONS FOR INSTALLATION............... 06-11 06-13 6-6 PRECAUTIONS FOR SERVICING................06-14 6-7 IN USE OF THE NEW REFRIGERANT R407C............06-14 6-7-1 WHAT IS CFC/HCFC/HFC ?................. 6-7-2 CHARACTERISTICS OF R22 AND R407C............06-14 6-7-3 DEFFERENCE FROM CONVENTIONAL MODEL(R22) AND PRECAUTIONS... 06-15 7.
  • Page 6 R407C 1 . TEST RUN...

  • Page 7: Check Items Before Test Run

    1. TEST RUN 1-1 CHECK ITEMS BEFORE TEST RUN Before test run, check the following items. 3 5 6 7 20 15 16 19 21 22 RB unit RB unit 50Hz Outdoor 220 - 240V 12 13 14 unit 9 10 9 10 Indoor 4W 50Hz 380 - 415V...

  • Page 8: Check Item During Test Run

    1-2 CHECK ITEM DURING TEST RUN During the test run operation, check the following items. RB unit RB unit 50Hz Outdoor 220 - 240V unit Indoor 4W 50Hz 380 - 415V unit Transmission line 50Hz 220 - 240V Wired Central remote controller remote controller When the power supply turn on,check the following items.

  • Page 9: Test Run Method

    1-3 TEST RUN METHOD Supply power to the crankcase heater for 12 hours prior to the start of operation if the outdoor temperature is lower than 20 . The following is the procedure for the test run operation. 1-3-1 TEST RUN FROM OUTDOOR PC BOARD By setting DIP SW1-1 and SW1-2 on control PC board of outdoor unit, cooling test run or heating test run for all the indoor units in the same refrigerant system can be performed.
  • Page 10 3) Simple remote controller Stop the indoor and outdoor units. Push the remote controller button and button simultaneously for more than three seconds. The air conditioner will start to conduct a test run and will display on the temperature display. display.

  • Page 11: Test Run Control

    1-4 TEST RUN CONTROL 1) When the test run signal is transmitted from standard wired, wireless remote controller, simple remote controller and central remote controller. (1) The test runn operation starts and the electric expansion valve is controlled to a maximum flow, regardless of the temperature condition.
  • Page 12 R407C 2 . FUNCTION OF PRINTED CIRCUIT BOARD...

  • Page 13: Pcb Layouts

    2. FUNCTION OF PRINTED CIRCUIT BOARD 2-1 PCB LAYOUTS 2-1-1 INDOOR UNIT CONTROL CIRCUIT BOARD Indoor unit Forbidden Forbidden SW 1 Room temp correct coefficient of heating 1 Room temp correct coefficient of heating 2 Room temp correct coefficient of cooling Forbidden SW 2 Filter check validity / invalidity...

  • Page 14: Indoor Unit Control Circuit Board (Compact Wall Mounted Type)

    2-1-2 INDOOR UNIT CONTROL CIRCUIT BOARD (COMPACT WALL MOUNTED TYPE) Indoor unit Forbidden(Indoor unit fan speed switch 1) Forbidden(Indoor unit fan speed switch 2) SW 1 Forbidden(Indoor unit model code) Forbidden(Indoor unit model code) Indoor unit address switch Indoor unit address switch DIP SW SW 2 Auto restart validity / invalidity...

  • Page 15: Outdoor Unit Control Circuit Board

    2-1-3 OUTDOOR UNIT CONTROL CIRCUIT BOARD SW5 SW4SW3 SW2 SW1 SW9SW8 CN33 CN27 CN34 CN51 CN45 CN22 CN35 CN44 CN24 LED4 LED1 CN29 CN28 CN25 LED2 LED5 LED3 CN26 LED6 CN30 CN42 CN31 CN48 CN20 CN18 CN14 CN12 CN10 CN19 CN13 CN11 Outdoor unit...

  • Page 16: Circuit Board

    2-1-4 WIRED REMOTE CONTROLLER,SIMPLE REMOTE CONTROLLER CIRCUIT BOARD Simple remote controller Wired remote controller DIP SW1 DIP SW2 DIP SW1 DIP SW2 Wired & Simple remote controller Remote controller switch 1(Terminator) SW 1 Indoor unit connection (One / multiple) Forbidden Remote controller switch 2(Master / Slave) Forbidden Forbidden...

  • Page 17: Central Remote Controller Circuit Board

    2-1-5 CENTRAL REMOTE CONTROLLER CIRCUIT BOARD DIP SW2 SWITCH 42 DIP SW3 Central remote controller External input validity / invalidity SW 2 External input select edge / pulse Filter sign indication ON / OFF C / F switch RC operation prohibit function validity/invalidity DIP-SW Forbidden Forbidden...

  • Page 18: Network Convertors' Circuit Board

    2-1-6 NETWORK CONVERTORS' CIRCUIT BOARD Network Convertor (UTR-YSSA) Remote controller type SW 103 Number of connected indoor units DIP SW Forbidden SW 107 Wired remote controller validity / invalidity External input validity / invalidity SW 108 External input select edge / pulse Auto changeover validity / invalidity * Set to OFF for duct type indoor unit SW 109...
  • Page 19 (Switch) Switch No. Type Contents Service Pin SW (VRF side) Push switch Push switch Service Pin SW (Lon works side) Push switch Selection of setting mode Confirmation of setting Push switch Rotaly switch (0-15) Setting up the value at the each setting mode (D25-D22) Setting up the value at the each setting mode (D21-D18) Rotaly switch (0-15) Push switch...

  • Page 20: Microprocessor Function List

    2-2 MICROPROCESSOR FUNCTION LIST 2-2-1 INDOOR UNIT High Large Compact Thin Large Compact Static Static INDOOR UNIT TYPE Universal Ceiling Cassette Cassette Cassette Duct Pressure Pressure Duct Duct 60,000 54,000 45,000 36,000 30,000 24,000 (25,000) CAPACITY 20,000 (BTU/h) 18,000 14,000 12,000 9,000 7,000...
  • Page 21 INDOOR UNIT TYPE Wall Mounted Ceiling Wall 30,000 CAPACITY 24,000 (BTU/h) 18,000 14,000 TH. FUSE FAN MOTOR FAN MOTOR D. PUMP S. VALVE DIFFUSER/SP-M(U,D) SP-M(L/R) DISPLAY-1 DISPLAY-2 CN10 F. BACK CN11 TEST CN12 E.E.VALVE CN13 REMOCON CN14 FLOAT CN15 NETWORK CN16 R.-TH CN17 P-TH CN18 S-TH...
  • Page 22 INDOOR UNIT TYPE Compact Wall Mounted 14,000 •› CAPACITY 12,000 •› •iBTU/h•j 9,000 •› 7,000 •› POWER-PWB •› FAN F. BACK •› E. E. VALVE •› SP MOTOT(U,D) •› DISPLAY •› ROOM TH. •› PIPE TH. •› TEST •› FLASH •›...

  • Page 23: Outdoor Unit

    2-2-2 OUTDOOR UNIT OUTDOOR UNIT TYPE AO*90MPCMF AC IN FAN.1 FAN.2 BASE HEATER CRANK CASE HEATER S.V.1 S.V.2 S.V.3 CN10 S.V.4 CN11 S.V.5 CN12 S.V.6 CN13 S.V.7 CN14 S.V.8 CN18 4WV.2 CN19 4WV.3 CN20 4WV.4 CN22 TERMINATOR CN24 COMP.1 CN25 COMP.2 CN26 COMP.3...

  • Page 24: Function And Setting Of Each Switch

    2-3 FUNCTION AND SETTING OF EACH SWITCH 2-3-1 INDOOR UNIT 1. SW1 setting 1-1 DIP SW 1-1 and SW 1-2 setting forbidden Factory setting) SW1-1 SW1-2 1-2 Room temperature correct coefficient of heating. Decide the heating temperature correct coefficient value of heating. Factory setting) HEATING TEMPERATURE CORRECTION SW1-4...
  • Page 25 3. SW3 setting (Never change at the site) 3-1 Indoor unit fan speed switch This switch can select fan speed corresponding to each model. Large ceiling type AB36 AB45 AB54 AB30 SW3-1 SW3-2 SW3-3 Cassette type AU54 AU45 AU36 AU30 AU25 AU20 SW3-1...
  • Page 26 4. SW4 setting (Never change at the site) Indoor unit model code. This switch for changing the model code information of indoor unit PCB. INDOOR UNIT MODEL CODE Capacity 25(24) Type SW4-1 SW4-2 SW4-3 SW4-4 5. SW5 setting 5-1 Wireless remote controller custom code switch Decid the custom code and restrict the type of infrared control signal, in order to prevent mixing of multiple indoor unit signals.
  • Page 27 1.SW6 setting Indoor unit address switch Sets the indoor unit addresses. INDOOR UNIT ADDRESS SWITCH (Factory setting : 0) Rotary SW Description Remarks Indoor unit Indoor unit address address SW ( 0~15 ) 2.SW7 setting forbidden Rotary SW7 3.SW8,9 setting Refrigerant circuit address switch Sets the refrigerant circuit.

  • Page 28: Indoor Unit(Compact Wall Mounted Type)

    2-3-2 INDOOR UNIT ( COMPACT WALL MOUNTED TYPE ) 1. SW1 setting (Never change at the site) 1-1 Fan speed setting switch The fan speed corresponding to each model is set with the switch. AS12 AS14 SW1-1 SW1-2 1-2 Model code setting switch The model code infomation corresponding to each model is provided with the switch.
  • Page 29 3. SW3 setting 3-1 Refrigrant circuit address switch By combined with Rotary SW5 , the refrigerant circuit address (0-99) can be set. Please see "6-2 ADDRESS SETTING" for refrigerant address conversion table. Factory setting) Refrigerant SW3-1 SW3-2 SW3-3 Remarks circuit address 0 - 15 16 - 31 About Rotary...

  • Page 30: Remote Controller

    1.SW4 setting Indoor unit address switch Set the indoor unit addresses. INDOOR UNIT ADDRESS SWITCH (Factory setting : 0) Rotary SW Description Remarks Indoor unit Indoor unit address address SW ( 0~15 ) 2.SW5 setting Refrigerant circuit address switch By combined with DIP switch 3-1,3-2 and 3-3,the refrigerant circuit address(0 - 99)can be set. Please see "5-3-3 ADDRESS SETTING"...
  • Page 31 2-3-3 OUTDOOR UNIT DIP SWITCH SETTING 1. SW1 setting 1-1 Test run By setting DIP SW1-1 and SW1-2 on control PC board of outdoor unit, cooling test run or heating test run for all the indoor units in the same refrigerant system can be performed. Factory setting) SELECTOR SWITCH FOR TEST RUN AND NORMAL OPERATION SW1-2...
  • Page 32 2-3 Expansion valve initialization This switch initializes the number of pulses of the expansion valve when the outdoor unit is stopped. Factory setting) ELECTRONIC EXPANSION VALVE INITIALIZATION SW2-3 Initialization Release Operate 2-4 Forced oil recoverry operation. Oil recovery is started manually by DIP SW 2-4 on the PCB. Factory setting) FORCED OIL RECOVERY Forced oil recovery...

  • Page 33: Rotary Switch Setting

    6. SW6 setting DIP SW 6-1,SW6-2,SW6-3 and SW6-4 setting forbidden SW6-1 SW6-2 SW6-3 SW6-4 7. SW7 setting 7-1 System type switches Factory setting) SYSTEM TYPE SWITCHES SW7-2 SW7-1 System type Forbidden Forbidden Heat recovery Forbidden 7-2 Dip SW 7-3 and SW 7-4 setting forbidden SW7-3 SW7-4 ROTARY SWITCH SETTING...

  • Page 34: Wired, Simple Remote Controller

    2-3-4 WIRED , SIMPLE REMOTE CONTROLLER DIP SWITCH SETTING 1. SW1 setting 1-1 Remote controller switch 1 This is used to set up the terminated resistance of the wired remote controller. When 1 remote controller is connected to remote controller group, set this ON all the time. When 2 remote controllers are connected to remote controller group, set the Master one OFF, and set the Slave one ON.
  • Page 35 2. SW2 setting 2-1 Cooling only / heat pump Switching cooling only / heat pump. Factory setting) COOLING ONLY / HEAT PUMP SWITCH SW2-1 Operation system Heat pump/Heat recovery Cooling only 2-2 Auto change over validity/invalidity Selecting auto change over validity/invalidity. Never turn it on in the case of Heat pump type.

  • Page 36: Central Remote Controller

    2-3-5 CENTRAL REMOTE CONTROLLER 1. DIP-SW2 SETTING 1-1 DIP SW2-1 setting . For validity / invalidity the external input function. Factory setting) SW 2-1 External input function Invalidity Validity 1-2 DIP SW2-2 setting . Select the external input command function. Factory setting) SW 2-2 External input select...
  • Page 37 1-6 DIP SW2-6 and 2-7 setting forbidden. SW 2-6 SW 2-7 1-7 DIP SW2-8 setting. SRAM Battery ON / OFF When installing the control remote controller, this switch must be set to ON. (factory setting:OFF) Factory setting) SW2-8 SRAM Battery At the time of shipment,the battery is turned off to avoid electricity consumption.

  • Page 38: Network Convertor

    2-3-6 NETWORK CONVERTOR 1. Dip SW103 ( 1, 2, 3, 4) setting Set Dip SW103 ( 1, 2, 3, 4) according to indoor unit type and remote RC Number controller (packaged together with the unit) type. You can also set DIP-SW103 (1, 2, 3, 4) using the remote controller number that is EZ-########-R shown on the rear surface of the remote controller.
  • Page 39 4. DIP SW 108 setting 4-1 External input validity / invalidity Select the external input function validity / invalidity Factory setting) External input function SW 108-1 Invalidity validity 4-2 External input command type Select the external input command type Factory setting) SW 108-2 External input command type Edge...

  • Page 40: Indoor Unit(Except For Compact Wall Mounted Type)

    2-4 EXTERNAL INPUT & OUTPUT 2-4-1 INDOOR UNIT ( EXCEPT FOR COMPACT WALL MOUNTED TYPE (1) Control input (Operation/Stop) Indoor unit can be operated or stopped by using indoor unit PCB CN 21 (Wall mounted type / ceiling wall type) or CN27 (other types) 1 Input select Dip SW3-4 Input select...

  • Page 41: Error Display

    (2) Output CONNECTOR OUT VOLTAGE STATUS Operation CN22 Stop Error CN23 Normal Fan run CN24 Fan stop 1 Operation display Indoor Operation unit CN 22 Operation Stop Indicator (WHITE) CN 22 2 Error display Indoor Error unit CN 23 Error Normal Indicator (WHITE)

  • Page 42: Indoor Unit(Compact Wall Mounted)

    2-4-2 INDOOR UNIT (COMPACT WALL MOUNTED) (1) Control input (Operation/Stop) Indoor unit can be operated or stopped by using the connector CN10(RED) ON indoor unit PCB. CONNECTOR INPUT SIGNAL COMMAND Ch 1 1 CN 10 Operation CN10 (RED) (RED) Stop Ch1 of CN10 NOTE...
  • Page 43 2-4-3 OUTDOOR UNIT (1) Output 1 Error display CN 48 Error This output indicates the outdoor unit and connected indoor Indicator (BLACK) unit's "Normal" or "Error" status. P.C.B CONNECTOR OUTPUT VOLTAGE STATUS Error Normal CN48 Normal CN48 (BLACK) Error 2 Base heater output Turn ON when the ambient temperature is low in heating mode.(2 C or less) Base heater (Field supply)

  • Page 44: Central Remote Controller / Pc Controller

    2-4-4 CENTRAL REMOTE CONTROLLER / PC CONTROLLER (1) Input Control input (All on / All off) Indoor units which stored into Central R.C. or PC controller can be operated or stopped by this input. a) Input select Central remote controller DipSW2-1 DipSW2-2 Input select...
  • Page 45 (2) Output Operation display This output indicates the indoor unit's "Operate" or "Stop" status. OUTPUT CONNECTOR STATUS SIGNAL Open All of indoor units "OFF" (WHITE) Short At least one more indoor units "ON" Indoor ON /OFF Unit Indicator (WHITE) Short Error Indicator Open...
  • Page 46 2-4-5 NETWORK CONVERTOR D129 The connector positions and pin number of network convertor (UTR-YSSA) for external input and output are shown in the right figure. SW107 SW108 SW109 SW103 3 2 1 . . . SW110 SW111 CN105(RED) EXT IN (1) Control input (Operation / Stop) Indoor units that connected to network convertor can be controlled (all operation / all stop by this input.
  • Page 47 (2) Output Operation display (EXT OUT1) This output indicates the indoor unit's "Operation" or "Stop" status. OUTPUT CONNECTOR STATUS SIGNAL Indoor units "Stop" Open CN108 (BLACK) Short Indoor units "Operation" Operation Indoor Unit ON /OFF Stop Indicator CN108 Short CN108 (BLK) (BLK) Open...
  • Page 48 R407C 3 . OUTDOOR UNIT OPERATION CONTROL...

  • Page 49: Compressor Operation Control

    3. OUTDOOR UNIT OPERATION CONTROL 3-1 COMPRESSOR OPERATION CONTROL 3-1-1 OPERATION / STOP CONDITION Compressor operation condition When cooling requirement capacity or heating requirement capacity from either of the indoor units in the same refrigerant system is input, the compressor operates. But in the following case, the compressor operates in accordance with operation of each mode.

  • Page 50: Compressor Recovery Operation

    3-1-4 COMPRESSOR RECOVERY OPERATION If compressor 1, 2, or 3 fails, or if two compressors fail at the same time, the remaining compressor(s) perform recovery operation to prevent interruption of air conditioning system operation by a failure. When compressor 1, 2, or 3 is judged to be faulty, the system is operated by switching the compressor output pattern (compressors 0 to 6) as shown in the following table.

  • Page 51: Heat Exchange Capacity Control

    3-2 HEAT EXCHANGE CAPACITY CONTROL The heat exchanger capacity and four-way valve, solenoid valve, and electronic expansion valve operation states are shown below. 1. Cooling, Cooling main Solenoid valve Electronic expansion Used heat 4-way valve (4WV) (SV) valve (EEV) exchanger(HP) Remarks Pattern 4WV2 4WV3 4WV4...

  • Page 52: Outdoor Fan Motor Control

    3-3 OUTDOOR FAN MOTOR CONTROL 1 ON /OFF The outdoor fan motor is turned on with the compressor start and turned off with the compressor stop except for the following cases. Also when the operating mode of the outdoor unit is changed, fan speed will be controlled under new operating mode condition.
  • Page 53 3 Fan Speed Switching (a) Fan speed of cooling mode, cooling main mode and oil recovery operation The fowllowing table shows the fan speed associated with outdoor temperature. Fan speed switched according to outdoor temperature NORMAL OPERATING MODE OUTDOOR TEMPERATURE SILENT OPERATING MODE >...
  • Page 54 3-4 EXPANSION VALVES 1 AND 2 CONTROL 1) Purpose of the control In order to balance the refrigerant flow rate of each heat exchanger and to adjust the refrigerant gas to an optimum state, a feedback control of expansion valves 1 and 2 is performed by using operation date which is obtained with thermistors and pressure sensors.
  • Page 55 3-5 CIRCULATING SAVE AMOUNT CONTROL 1) Expansion Valve 3 Control As there is a difference between compressor’s actual capacity (operating capacity) and required capacty (from indoor units), the difference in capacity is bypassed as a circulating save amonunt. ( Operating capacity – required capacity ) 2) Start condition When all the following conditions are satisfied.
  • Page 56 3-7 DEFROSTING CONTROL 1) Purpose of operation By removing the frost that was formed on the surface of the outdoor unit heat eachanger, the defrosting operation prevents a decline in heat transfer efficiency and realizes an efficient heating operation. 2) About the defrosting operation (1) Starting condition of the defrosting operation The defrosting operation starts when all the following conditions are satisfied.
  • Page 57 3-8 OIL RETURN CONTROL 1. Two kinds of oil return control There are two oil return controls, one is the individual oil return control and the other one is centralized oil return control. When any of the solenoid valves opens, the oil return is performed. COMP.1 SEPARATOR SEPARA...
  • Page 58 3-9 OIL RECOVERY CONTROL 1) Purpose of the operation The amount of refrigerant machinery oil which has been transported to the indoor units and the connection pipe with the refrigerant will become large as the operation time of compressor increase. It is necessary to recover the oil back into the outdoor unit for a certain time interval in order to prevent compressors from damaging due to lack of lubrication oil.
  • Page 59 3-10 PROTECTION FUNCTIONS 1. Central discharge temperature protection 1) When the discharge temperature of any compressor reaches 110 C or higher, solenoid valve 1 (SV1) is turned on and bypass is performed. SV1 is turned off and central discharge temperature protection operation is ended by any of the following conditions: (1) Discharge temperature of all compressors reaches 95 C or lower.
  • Page 60 R407C 4 . INDOOR UNIT OPERATION...

  • Page 61: Indoor Unit Operation

    4. INDOOR UNIT OPERATION 4-1 TIMER CONTROL There are three timer modes: "OFF TIMER", "ON TIMER" and Remote control button selected "WEEKLY TIMER" . (1) Set the clock time when the unit is in the stop mode (only the CLOCK current time will be shown on the remote control unit display).
  • Page 62 Setting Up the Weekly Timer Operation Press the START/STOP button to stop the air conditioner, and then proceed as follows. 1. Press the TIMER MODE button so that "WEEKLY" appears on the display. The display now shows the current day (by DAY CODE), the first ON and OFF times for the day (the "WEEKLY 1"...
  • Page 63 12. Press the SET TEMP./DAY button to select another day for setup. The repeat steps 4 to 10 above to set the ON and OFF times for that day. CLOCK 13. When you have finished setting all of the times, hold down the SET button for 3 seconds.
  • Page 64 About the DAY OFF setting Use the DAY OFF setting to switch off timed operation for a selected day in the coming week. This is a temporary, one-time setting. The DAY OFF setting is automatically cleared as soon as the specified day passes. Using the DAY OFF Setting Press the START/STOP button to stop the air conditioner, and then proceed as follows.
  • Page 65 Cancelling Selected Time Settings AUTO AUTO Press the START/STOP button to stop the air conditioner, and TIMER TIMER WEEKLY WEEKLY then proceed as follows. DEFROST TEST 1. Carry out steps 1 to 3 of the "Setting Up the Weekly TImer TIMER SET TIME TEMP./DAY...
  • Page 66 4-2 FAN CONTROL 4-2-1 "AUTO" POSITION Fan speed zone 1) COOLING OPERATION Hi zone The fan speed is determined automatically in accordance with the condition "(T (corrected room temperature) - T (corrected set temperature)" as shown on the right. Med zone However, the fan speed zone is determined in the manner as the room temperature increases for the following cases.
  • Page 67 4-3 MASTER CONTROL 4-3-1 OPERATING MODE CONTROL Each operating mode is controlled as below. Stop Cool Heat Indoor fan motor Operates according to Operates according Operates according to the See the fan control the AIR FLOW-MODE to the AIR FLOW- AIR FLOW-MODE setting, page.
  • Page 68 4-3-2 "AUTO" (Auto changeover) POSITION (1) When AUTO CHANGEOVER is selected, the air conditioner selects the appropriate operating mode (Cooling or Heating) according to your room's present temperature. (2) When AUTO CHANGEOVER is first selected, the fan will operate at very low speed for about one minute while the unit determines the current conditions of the room and accordingly selects the proper operating mode.
  • Page 69 4-3-3 "COOL" POSITION When using the cooling mode, set the temperature to a value lower than the current room temperature, otherwise the indoor unit will not start the cooling operation and only the fan will rotate. An example for COOLING TEMPERATURE CONTROL time chart (Manual setting) Ts + T1 •...
  • Page 70 4-4 LOUVER CONTROL (1) ADJUSTING THE DIRECTION OF AIR CIRCULATION Instructions relating to heating ( ) are applicable only to heat pump type outdoor unit. TIMER SET TIME TEMP./DAY MODE CONTROL MASTER CONTROL Begin air conditioner operation before performing this procedure. CLOCK ADJUST Vertical Air Direction Adjustment ZONE...
  • Page 71 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. During Cooling mode : Horizontal flow During Heating mode : Downward flow During AUTO mode operation, for the first minute after beginning operation, airflow will be horizontal the air direction cannot be adjusted during this period.
  • Page 72 To Stop Vertical airflow SWING Operation Press the VERTICAL SWING button for more than two seconds once and again. The remote controller's VERTICAL SWING lamp **and indoor unit's SWING indicator lamp (VERTICAL SWING) will go out. Airflow direction will return to the setting before swing was begun. Air swing range (Expect for compact wall mounted type indoor unit) Instructions relating to "the indoor unit's indicator lamp"...
  • Page 73 4-5 ENERGY SAVE OPERATION (1) About the ENERGY SAVE The energy conservation mode (ENERGY SAVE) raises the set temperature slightly in the cooling mode and lowers the set temperature in the heating mode, using a computer program to economically control the operation of the unit. If you press the ENERGY SAVE button while the air conditioner is on , it will change to the conservation mode.
  • Page 74 4-6 ANTI FREEZE CONTROL (1) About the ANTI FREEZE The freeze prevention fuction operates when the START/STOP button is pressed NON STOP CLOCK AUTO AUTO CENTRAL OFFON COOL and the remote controller is in stop mode (indoor unit is in stop mode). When- TIMER TIMER WEEKLY...
  • Page 75 4-7 ELECTRONIC EXPANSION VALVE CONTROL After the power is turned on, the following operation is controlled automatically to control the most suitable refrigerant charge according to the operation mode and operation conditions of each unit. Electronic expansion valve control process. The electronic expansion valve adjusts the opening by selecting the number of pulses from the rated capacity,operation mode ( cool / heat ) and set temperature of each indoor unit.
  • Page 76 R407C 5 . TROUBLE SHOOTING...

  • Page 77: Troubleshooting

    5. TROUBLESHOOTING 5-1 INDOOR UNIT SWING LAMP (Orange) SWING LAMP (Orange) TIMER LAMP (Green) OPERATION LAMP (Red) MANUAL AUTO SWING SWING TIMEROPERATION Operation can be checked by lighting and flashing of the LED (OPERATION, TIMER, SWING) of the grille display section. Perform judgment in accordance with the following.
  • Page 78 5-1-2 ABNORMAL OPERATION DISPLAY Error display Error contents OPERATION TIMER HORIZONTAL VERTICAL lamp lamp SWING lamp SWING lamp 0.1sec 0.1 sec Goes off Goes off Model information abnormal ON/OFF ON/OFF 0.1 sec 0.1 sec 0.1 sec 0.1sec Power supply frequency abnormal ON/OFF ON/OFF ON/OFF...

  • Page 79: Normal Operating Display

    5-2 OUTDOOR UNIT 5-2-1 NORMAL OPERATING DISPLAY Display Type LED 1 LED 2 LED 3 LED 4 LED 5 LED 6 Cooling operation Heating operation Cooling main operation Heating main operation Same performance operation Compressor output STEP1 Compressor output STEP2 Compressor output STEP4 Compressor output STEP5 Compressor output STEP6...
  • Page 80 5-2-2 ABNORMAL OPERATION DISPLAY Display type LED 1 LED 2 LED 3 LED 4 LED 5 LED 6 Compressor 1 error Compressor 2 error Compressor 3 error Discharge temperature 1 error Discharge temperature 2 error Discharge temperature 3 error High-pressure error Pump down error Discharge temperature thermistor 1 error Discharge temperature thermistor 2 error...

  • Page 81: Wired Remote Controller

    5-3 REMOTE CONTROLLER 5-3-1 WIRED REMOTE CONTROLLER Error Code NON STOP CLOCK COOL SET TIME TIMER SET TIME TEMP./DAY TIMER TEMP./DAY Remote controller MODE CONTROL MODE CONTROL MASTER MASTER CONTROL CONTROL address CLOCK ADJUST CLOCK ADJUST ZONE ENERGY SAVE START/STOP ZONE ENERGY SAVE START/STOP...
  • Page 82 5-3-3 CENTRAL REMOTE CONTROLLER If the and the number for the central control number flash during operation, there is an error at the relevant remote control group. Start the error monitor, identify the error and remove the cause. CLOCK MASTER ADJUST CONTROL TIME...
  • Page 83 TIME (4) Press to select the indoor units in the remote control group selected in 3. TIME Continue pressing , the error codes for the outdoor unit and the central re- mote controller are displayed. Each of the displays is shown below. Indoor unit error display If there have been multiple...
  • Page 84 Error code displayed on central remote controller Error Indoor unit error Outdoor unit error Central remote controller Code No error No error No error – – – Model information abnormal Model information error Printed circuit board error (Control panel) Microcomputer communication error Microcomputer communication error Printed circuit board error (Transmission adaptor) Power supply frequency abnormal...
  • Page 85 5-4 NETWORK CONVERTOR If there is a problem with the network convertor(UTR-YSSA), an error code will appear on D129 of print circuit board. Error code displayed on network convertor Error code Error contents No error (operation mode) Initial setting Circuit board error 1 Circuit board error 2 Transmission error with wired RC Transmission error with indoor unit...

  • Page 86: Trouble Shooting With Error Code

    5-5 ERROR CODE & TROUBLESHOOTING 5-5-1 TROUBLE SHOOTING WITH ERROR CODE INDOOR UNIT TROUBLESHOOTING ERROR ERROR ERROR CONTENTS CAUSE COUNTERMEASURE CODE No errors 1. Error occurrence condition Replace control printed circuit board of Model Model information is not When power is turned on. indoor unit.
  • Page 87 ERROR ERROR CAUSE ERROR CONTENTS COUNTERMEASURE CODE 1. Error occurrence condition Model information is not Replace control printed circuit board EEPROM After indoor unit operation is memorized, or erased because of indoor unit. deletion error started, error for model infor- of some reasons.
  • Page 88 ERROR COUNTERMEASURE ERROR CONTENTS CAUSE CODE Blower 1. Check if the connector of blower 1.Connector connection is 1. Error occurrence condition temperature The condition of thermistor, faulty. temperature thermistor loosens or which is short or open, is thermistor comes off. detected.
  • Page 89 ERROR ERROR CONTENTS ERROR CAUSE COUNTERMEASURE COCE Transmission 1. Error occurrence condition 1. Effect of extraneous noise. 1. When power is turned OFF and error Communication between turned ON again: indoor unit and outdoor unit 1) If error doesn't occur, printed circuit cannot be performed for a board is normal.
  • Page 90 ERROR ERROR CAUSE COUNTERMEASURE ERROR CONTENTS CODE Parallel 1. Effect of extraneous noise. 1. When power is turned OFF and turned 1. Error occurrence condition communication ON again: Communication between error 1) If error doesn't occur, printed circuit indoor unit control printed board is normal.
  • Page 91 OUTDOOR UNIT TROUBLESHOOTING ERROR ERROR COUNTERMEASURE ERROR CONTENTS CAUSE CODE No errors 1. Error occurrence condition Model information is not Replace outdoor unit control printed Model When power is turned on, memorized, or erased because circuit board. information error occurs in model of some reason.
  • Page 92 ERROR ERROR ERROR CONTENTS CAUSE COUNTERMEASURE CODE 1. Error occurrence condition EEPROM cannot be accessed 1. Remove noise sources near outdoor EEPROM After outdoor unit operation because of disturbance, device unit. access error is started, EEPROM cannot error, etc. 2. Replace outdoor unit control printed be accessed because of circuit board.
  • Page 93 ERROR ERROR CAUSE COUNTERMEASURE CONTENTS CODE Compressor 2 1. Error occurrence condition 1. Discharge temperature 1. Check if the wiring of discharge error After thirty minutes have sensor TH is faulty. temperature sensor TH loosens or elapsed since compressor 2 comes off.
  • Page 94 ERROR ERROR CAUSE COUNTERMEASURE CONTENTS CODE Discharge 1. Error occurrence condition 1. Connector contact is faulty. 1. Check if the connector of discharge temperature Thermistor condition, which temperature thermistor TH loosens thermistor 1 is short or open, is detected. or comes off. error 2.
  • Page 95 ERROR ERROR CAUSE COUNTERMEASURE CONTENTS CODE 1. Check if the connector of outdoor 1. Connector contact is faulty. 1. Error occurrence condition Outdoor temperature thermistor TH loosens Each thermistor condition, thermistor error or comes off. which is short or open, 2.
  • Page 96 ERROR ERROR ERROR CAUSE COUNTERMEASURE CONTENTS CODE Discharge 1. Error occurrence condition Replace discharge pressure sensor P Discharge pressure sensor P pressure sensor 1) Voltage output from output is faulty. error remains under 0.8V for 3 minutes or longer. However, Liquid pressure Liquid line pressure sensor P Replace liquid line pressure sensor P...
  • Page 97 ERROR ERROR CONTENTS ERROR CAUSE COUNTERMEASURE CODE 1. Error occurrence condition 1. Effect of extraneous noise 1. When power is turned off, and turned Transmission error Communication from each on again: indoor units are cut off for a (1) If error doesn't occur, printed circuit certain time.
  • Page 98 ERROR ERROR CONTENTS ERROR CAUSE COUNTERMEASURE CODE Discharge 1. Error occurrence condition 1. Gas leak or lack of refrigerant. 1. Check the gas leak and additional temperature 1 Discharge temperature 1 refrigerant amount, and recharge rises to 130 C or higher for error suitable refrigerant.
  • Page 99 ERROR ERROR CONTENTS ERROR CAUSE COUNTERMEASURE CODE Discharge 1. Error occurrence condition 1. Gas leak or lack of refrigerant. 1. Check the gas leak and check temperature 2 Discharge temperature 2 additional refrigerant amount and error rises to 130 C or higher for recharge suitable refrigerant.
  • Page 100 ERROR ERROR CONTENTS ERROR CAUSE COUNTERMEASURE CODE Discharge 1. Error occurrence condition 1. Gas leak or lack of refrigerant. 1. Check the gas leak and check temperature 3 Discharge temperature 3 additional refrigerant amount and error rises 130 C or greater for recharge suitable refrigerant.
  • Page 101 ERROR ERROR COUNTERMEASURE CONTENTS ERROR CAUSE CODE 1. Error occurrence condition 1. Ball valve is not opened 1. Open ball valve fully. High pressure error When any of following completely. conditions is satisfied: 1) Compressor is stopped 2. Outdoor unit short cycle 2.
  • Page 102 ERROR ERROR CONTENTS ERROR CAUSE COUNTERMEARSURE CODE Oil recovery 1. Check operation of following solenoid 1. Error occurrence condition 1. Oil recovery solenoid valve error valves. If operation is faulty, replace Oil is judged under oil is faulty. solenoid valve. sensor L level.
  • Page 103 ERROR ERROR COUNTERMEASURE CONTENTS ERROR CAUSE CODE 1. Error occurrence condition Pump down Pump down SW remains ON. Switch pump down DIP SW1-3 in Six minutes have elapsed error control printed circuit board of outdoor since pump down is unit from ON to OFF. performed, or discharge pressure sensor P is 3MPa...
  • Page 104 CENTRAL REMOTE CONTROLLER TROUBLESHOOTING ERROR ERROR CAUSE COUNTERMEASURE CONTENTS CODE No errors 1. Error occurence condition Printed circuit 1. After ACL key is pressed, or power 1. Effect of extraneous noise. Error occurs at control board error is turned on again: panel printed circuit board (Control panel) 1) If error dosen't occur, printed circuit...
  • Page 105 ERROR ERROR CAUSE COUNTERMEASURE CONTENTS CODE 1. After ACL key is pressed or power is 1. Error occurrence condition 1. Effect of extraneous noise Node setting turned on again : error Control panel printed circuit 1) If error doesn't occur, printed circuit board isn't initialized board is normal.
  • Page 106 ERROR ERROR CAUSE ERROR CONTENTS COUNTERMEASURE CODE 1. Effect of extraneous noise 1-1. Check error continuity. Connection 1. Error occurrence condition 1) If error is cleared automatically, error Communication between printed circuit board is normal. Then, transmission adapter and remove noise sources near central control panel is not remote controller.
  • Page 107 ERROR ERROR ERROR CONTENTS CAUSE COUNTERMEASURE CODE 1. Effect of extraneous noise 1. Initialize the setting again. 1. Error occurrence condition Initial setting 1) If error doesn't occur, printed circuit Initialization is not error board is normal.Then, remove performed normally. noise sources near control panel.
  • Page 108 ERROR ERROR CONTENTS ERROR CAUSE COUNTERMEASURE CODE 4. Transmission adapter 4. Check insertion of the communication Transmission 3. Clearance communication printed circuit printed circuit board of transmission error For 2-1), the board or indoor unit communication with indoor adaptor and the communication communication printed circuit printed circuit board of indoor unit.
  • Page 109 NETWORK CONVERTOR (UTR-YSSA) TROUBLESHOOTING ERROR ERROR COUNTERMEASURE CONTENTS CAUSE CODE No errors Initial setting 1. Error occurence condition Circuit board 1. Effect of extraneous noise. 1. After the SW104 button of network The signal synchronization error 1 convertor PCB is pressed for more between the network devices than five seconds, or the power of is not normally performed.
  • Page 110 ERROR ERROR COUNTERMEASURE CONTENTS CAUSE CODE Transmission 1. Error occurrence condition 1. Effect of extraneous noise. After the SW104 button of network error with Transmission between convertor PCB is pressed for more indoor unit indoor units and network than five seconds, or the power of convertor is not performed network convertor is reset.
  • Page 111 ERROR ERROR CAUSE COUNTERMEASURE CONTENTS CODE Transmission 1. Effect of extraneous noise. 3. Clearance 1-3 After the power of VRF system is error with Transmission between reset: VRF system VRF system and network 1) If error dosen't occur, printed circuit convertor is performed board is normal.

  • Page 112: Trouble Shooting With No Error Code

    5-5-2 TROUBLE SHOOTING WITH NO ERROR CODE How to read the tables 1.Select the relevant item of errors from 1 to 5 below,and decide the table to be used. 2.Deduce "Cause" from "LED display" and "Symptoms that can occur other than title". 3.Check if the deduced "Cause"...
  • Page 113 LED display Indoor Outdoor Remote Symptom that Check method Remarks unit unit controller Cause can occur other (Error state check method) PCB LED Body than title 1 to 6 Normal Normal Filter sign The meshes of the filter were Check if the filter is dirty. When the operating time of fan clogged up.
  • Page 114 2. System does not cool or heat LED display Indoor Outdoor Remote Symptom that Check method Remarks unit unit controller Cause can occur other (Error state check method) PCB LED Body than title 1 to 6 Error No display Error Power is not supplied to Check the voltage of power sup- Voltages between R-S, S-T,...
  • Page 115 LED display Indoor Outdoor Remote Symptom that Check method unit unit controller Remarks can occur other Cause (Error state check method) PCB LED Body than title 1 to 6 Indoor unit electronic expansion When the relevant indoor unit (1)Disconnect the plug from PCB Normal Normal Normal...
  • Page 116 LED display Symptom that Indoor Outdoor Remote Check method unit unit controller can occur other Cause Remarks (Error state check method) than title PCB LED Body 1 to 6 Normal Normal When the diameter is large, Normal Installed piping is not suitable. Check the capacity of indoor unit Abnormal sound a refrigerant rushing sound is...
  • Page 117 LED display Indoor Outdoor Remote Symptom that Check method unit unit controller Cause can occur other Remarks (Error state check method) than title Body PCB LED 1 to 6 Error display Error display Error display Check by measuring the Refer to section 7-2-1 to find the Outdoor thermistor is faulty.
  • Page 118 LED display Indoor Outdoor Remote Symptom that Check method unit unit controller Cause can occur other Remarks (Error state check method) Body PCB LED than title 1 to 6 Controlling Controlling Normal Defrosting operation in progress. Outdoor unit heat exchanger Operation display LED display display...
  • Page 119 3. Abnormal sound is heard from the indoor unit. LED display Indoor Outdoor Remote Symptom that Check method unit unit controller Cause Remarks can occur other (Error state check method) than title Body PCB LED 1 to 6 Solenoid valves (SV ) of RB (1)Check the voltage.
  • Page 120 LED display Check method Indoor Outdoor Remote Symptom that Cause Remarks unit unit controller (Error state check method) can occur other Body PCB LED than title 1 to 6 Normal Open the 3-way valve and ball Normal Normal Ball valve and 3 way-valve are Check the positions of spindle System does display...
  • Page 121 5. Others LED display Indoor Outdoor Remote Check method Symptom that Cause unit unit controller Remarks (Error state check method) can occur other Body PCB LED than title 1 to 6 Normal Normal Normal The electronic expansion valve When the indoor unit power is display display display...

  • Page 122: Operation Not Trouble

    5-6 CASES SUCH AS THESE ARE NORMAL Operation not trouble From the stand point of control, the following operations are incorporated for air conditioner operation and protection. They do not indicate trouble. Operation Description Indoor unit Remote indication Indicates that the power came on normally when power The red and green lamps flash was applied (at power failure recovery).
  • Page 123 R407C 6 . APPENDING DATA 1 (INSTALLATION)
  • Page 124 6. APPENDING DATA1 (INSTALLATION) 6-1 ADDITIONAL CHARGE Application models AO 90MPCMF Additional charge for pipe length Liquid pipe outside Ø12.70 Ø9.52 Ø6.35 diameter (mm) Additional refrigerant 0.136 0.063 0.025 (kg/m) The amount of additional charge C (kg) Total length x 0.136 Total length x 0.063 Total length...
  • Page 125 6-2 ADDRESS SETTING With this system, an address must be set for the indoor unit, outdoor unit and remote controller and central remote controller. 6-2-1 KINDS OF ADDRESS AND SETTING RANGE SETTING UNIT SETTING TYPE OF SWITCH REMARKS RANGE Outdoor Refrigerant Setting 0 99...
  • Page 126 Refrigerant circuit address conversion table Outdoor unit Rotary switch (SW 8)- - - Factory setting "0" Rotary switch (SW 9)- - - Factory setting "0" Indoor Unit Rotary switch (SW 8)- - - Factory setting "0" Rotary switch (SW 9)- - - Factory setting "0" In the case of a multiple refrigerant system, each refrigerant system (outdoor unit and indoor unit) must be set an exclusive refrigerant circuit address.
  • Page 127 6-2-2 ADDRESS SETTING FOR COMPACT WALL MOUNTED TYPE INDOOR UNIT KINDS OF ADDRESS AND SETTING RANGE SETTING SETTING TYPE OF SWITCH REMARKS RANGE DIP-SW 3 Rotary - SW 5 Refrigerant See refrigerant address circuit address 0 99 conversion table below Setting example: 16 DIP-SW 2 Rotary - SW 4...

  • Page 128: Examples Of System Setting

    6-2-3 EXAMPLES OF SYSTEM SETTING The following examples apply to all indoor units except for compact wall mounted type indoor unit. Transmission line (Non-polar 2 core) 0 14 0 15 0 2 Indoor units (Max.16) DSW1-1 DSW1-1 DSW1-2 DSW1-2 DSW1-4 DSW1-4 2 Remote controllers 63 6 0...
  • Page 129 Refrigerant circuit address (Outdoor unit) Refrigerant circuit address (Indoor unit) Refrigerant circuit 1 Refrigerant circuit 2 Outdoor unit PCB (Address setting No.0 Indoor unit PCB (Address setting No.0 Setting by rotary SW8,9 Setting by rotary SW8,9 For compact wall mounted type indoor unit, refer to 6-2-2.
  • Page 130 Remote controller switch 1 If 2 sets of wired remote controllers are connected to the remote control group, turn the DIP SW 1-1 of Master Remote Controller off. SW1-1 OFF ON [Master] [Slave] [Master] When only 1 remote controller will connect, Remote controller unit PCB this switch must be set ON.
  • Page 131 Remote controller switch 2 (Remote controller) OFF ON OFF ON [Master] [Slave] [Master] [Slave] Remote controller unit PCB Setting by DIP SW 1 - 4 Central remote controller address Central remote controller (Max. 16) Set central remote controller address first, to conduct the initial setting of it. 06-08...

  • Page 132: Start And Stop Of The Pump Down

    6-3 PUMP DOWN METHOD 6-3-1 START AND STOP OF THE PUMP DOWN (1) If the following condition is satisfied, pump down operation will start. When the operation mode is stopped and pump down DIP-SW 1-3 turns OFF (2) Pump down operation stops immdiately in the following cases. When pump down DIP-SW is turned ON When the discharge pressure sensor detects a pressure higher than 3MPa.
  • Page 133 (Fig.4-13) It is always compulsory to change the liquid, because R407C is a mixed refrigerant and there is some fear that a mixing ratio changes. In order to avoid the refrigerant from returning to the compressor in a liquid state, the refrigerant can be charged instead of giving a load to the compressor with a safety charger.

  • Page 134: Brazing Work

    6-5 PRECAUTIONS FOR INSTALLATION 1. Preparing pipes Diameter and thickness of copper pipes is shown below. (1) Use the designated size ( diameter & thickness ) of refrigerant pipes. Nominal Outer diameter Thickness (2) Those pipes purchased locally may contain dust diameter (inch) (mm) (mm)

  • Page 135: Additional Charge

    (3) When charging the refrigerant, always use an electronic balance for refrigerant charging. (to measure the refrigerant by weight) (4) R407C is a mixture of 3 refrigerants with different evaprotion temperature. The composition changes if it is charged in gas phase.
  • Page 136 7. Precautions on Header installation Since necessary performance may not be obtained due to the mounting angle, header installation is specified as follows. (1) Connection pipe to each indoor unit shall be connected from the edge of header. (Connect the pipe in order of 1, 2, 3, ..as shown in the figure below.) Gas pipe Liquid pipe (2) Header shall be mounted horizontally.
  • Page 137 For R407C, the materials should being reviewed. 4. Check not to charge with wrong refrigerant As there are air conditioner models using different refrigerant such as R22, R407C, make sure not to use wrong refrigerant when installing and servicing.

  • Page 138: What Is Cfc/Hcfc/Hfc

    Ozone depletion gen starvation accident. 0.055 potential ODP If a fire is used in R407C existing area, a poisonous Global warming will occur, so be sure to handle it only in a well...

  • Page 139: Heat Exchanger

    6-7-3 DEFFERENCE FROM CONVENTIONAL MODEL (R22) AND PRECAUTIONS • Use new synthetic oils such as ester because HFC series refrigerant has less solubility with mineral oils conventionally used for R22. • As these new synthetic oils are easily influenced by moisture and dusts, they must be treated more care- fully than the conventional lubricating oils.

  • Page 140: Ball Valve

    BALL VALVE • Review material O-ring, valve core seal for securing suitability with oil. CAUTION Check if the valve is suitable for the refrigerant (model) when replacing. DRYER • Change desiccant (XH-6 XH-10). Volume of desiccant is increased. CAUTION Complete welding within one hour after the package of dryer is opened. PRESSURE SWITCH •...
  • Page 141 R407C 7 . APPENDING DATA 1 (UNIT)
  • Page 142 7. APPENDING DATA1 (UNIT) 7-1 REFRIGERANT PIPE SYSTEM DIAGRAM MODEL : AO*90MPCMF 07-01...
  • Page 143 7-2 CHARACTERISTICS OF SENSORS 7-2-1 THERMISTOR Thermistor resistance values <Indoor unit side> 1) Room temperature thermistor (TH OA , Room tempera- 12.5 17.5 22.5 27.5 ture ( C) Resistance value 33.6 29.5 25.9 22.8 20.2 17.9 15.8 14.1 12.5 11.2 10.0 (k ) Room tempera-...
  • Page 144 Thermistor resistance values <Outdoor unit side> 1) Outdoor heat exchanger outlet and inlet thermistor (TH , TH , TH , TH HO1, HO2, HIO1 HIO2 HIO3 Pipe tempera- -7.5 -5.0 -2.5 ture ( C) Resistance value 384.8 182.8 92.3 49.2 27.5 24.0 20.9...

  • Page 145: Pressure Sensor

    7-2-2 PRESSURE SENSOR 1) Characteristics of pressure sensor 1.75 Pressure OUTPUT VOLTAGE OF THE PRESSURE SENSORS ( HP,LP ) Pressure 0.60 0.00 0.10 0.20 0.30 0.40 0.50 0.70 0.80 0.90 1.00 1.20 1.40 (MPa) Output 0.00 1.11 1.21 1.33 1.56 1.80 2.13 2.36...
  • Page 146 7-2-5 OTHERS 1) Solving the problem is nesessary since following can be occured. Gas leakage, capacity declining cause by gas shortage. Dirt from the filter and the EEV. Capacity declining by mis-setting of the indoor unit capacity. Unfit of the refrigerant pipe. Increasing the indoor unit by mis-piping.
  • Page 147 7-3 WIRING DIAGRAM 7-3-1 INDOOR UNIT UNIVERSAL FLOOR / CEILING TYPE MODELS : AB12, AB14, AB18, AB24 07-06...
  • Page 148 LARGE CEILING TYPE MODELS : AB30, AB36, AB45, AB54 07-07...
  • Page 149 COMPACT DUCT TYPE MODELS : AR7, AR9, AR12, AR14, AR18 07-08...
  • Page 150 LOW STATIC PRESSURE DUCT TYPE MODELS : AR25 07-09...
  • Page 151 LOW STATIC PRESSURE DUCT TYPE MODELS : AR30, AR36, AR45 07-10...
  • Page 152 HIGH STATIC PRESSURE DUCT TYPE MODELS : AR36H, AR45H, AR60H 07-11...
  • Page 153 COMPACT CASSETTE TYPE MODELS : AU7, AU9, AU12, AU14, AU18 07-12...
  • Page 154 CASSETTE TYPE MODELS : AU20, AU25, AU30 07-13...
  • Page 155 07-14...
  • Page 156 COMPACT WALL MOUNTED TYPE MODELS : AS7,AS9,AS12,AS14 07-15...
  • Page 157 WALL MOUNTED TYPE 07-16...
  • Page 158 CEILING WALL TYPE 07-17...
  • Page 159 7-3-2 OUTDOOR UNIT MODEL : AO*90MPCMF HEAT RECOVERY TYPE 07-17...
  • Page 160 7-4 OUTDOOR INTERNAL LAYOUT OUTDOOR UNIT INTERNAL LAYOUT 4-WAY VALVE 3 4-WAY VALVE 2 FAN2 FAN1 4-WAY VALVE 4 (FRONT) EXPANSION VALVES OIL SEPARATERS ACCUM RECEIVER TANK COMP2 OIL SEPARATER COMP3 COMP1 CONTROL (FRONT) OUTDOOR UNIT CONTROL BOX INTERNAL LAYOUT CAPACITOR 1 POWER RELAY 3 OUTDOOR P.C.B...
  • Page 161 (kW) HEAT RECOVERY P : SCROLL A: (2000.12 MF : MULTI F TYPE AO : OUTDOOR : 380-415V 50Hz (R407C) ~ 2005.6) 90 : (28.0) : 380-415V 50Hz B: (2005.7 T : (2000.12 ~ 2003.3) ~ 2008.8) M : (2003.4 ~ ) C: (2008.9 ~ )
  • Page 162 1116, Suenaga, Takatsu-ku, Kawasaki 213-8502, Japan Product specifications are subject to change without notice. " " is a worldwide trademark of FUJITSU GENERAL LIMITED. © Copyright 2003 Fujitsu General Limited. All rights reserved. Printed in Japan 2008.9...

This manual is also suitable for:

Airstage ab12Airstage ab14Airstage ab18Airstage ab24Airstage ab30Airstage ab36 ... Show all

Table of Contents