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.
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.
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...
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.
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.
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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.
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.
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R407C 2 . FUNCTION OF PRINTED CIRCUIT BOARD...
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...
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...
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(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...
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...
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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...
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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 •›...
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...
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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...
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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.
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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.
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.
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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...
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"...
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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...
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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...
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.
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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.
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...
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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.
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.
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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...
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...
(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)
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...
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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)
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...
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(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...
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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.
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(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...
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R407C 3 . OUTDOOR UNIT 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.
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.
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.
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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 >...
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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.
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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.
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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.
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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...
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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.
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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.
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).
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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"...
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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.
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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.
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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...
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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.
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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.
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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.
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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 •...
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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...
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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.
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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"...
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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.
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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...
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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.
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.
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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...
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...
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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...
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...
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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...
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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...
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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...
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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...
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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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...
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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.
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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.
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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.
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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.
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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.
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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.
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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...
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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...
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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"...
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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.
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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,...
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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...
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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...
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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.
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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...
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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.
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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...
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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...
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).
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R407C 6 . APPENDING DATA 1 (INSTALLATION)
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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...
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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...
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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.
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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...
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...
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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.
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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.
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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...
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.
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(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.
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)
(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.
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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.
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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.
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...
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.
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 •...
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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.
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7-3 WIRING DIAGRAM 7-3-1 INDOOR UNIT UNIVERSAL FLOOR / CEILING TYPE MODELS : AB12, AB14, AB18, AB24 07-06...
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LARGE CEILING TYPE MODELS : AB30, AB36, AB45, AB54 07-07...