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Fujitsu Airstage J-II Service Manual
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Fujitsu Airstage J-II Service Manual

Small vrf system
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Small VRF system
for light commercial
and home use
SERVICE MANUAL

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Summary of Contents for Fujitsu Airstage J-II

  • Page 1 Small VRF system for light commercial and home use SERVICE MANUAL...

  • Page 3: Table Of Contents

    CONTENTS 1. TEST RUN 1-1 EXECUTION PROCEDURE AND EXECUTION PRECAUTIONS......01-01 1-2 TEST RUN METHOD....................01-03 1-2-1 Check Items Before Power ON................01-03 1-2-2 Check Items After Power ON................01-04 1-2-3 Automatic address setting procedure for Signal amplifiers........01-06 1-2-4 Automatic address setting procedure for indoor units.......... 01-07 1-2-5 Indoor unit connection check procedure .............

  • Page 4: Table Of Contents

    CONTENTS 3. INDOOR UNIT OPERATION 3-1 FAN CONTROL......................03-01 3-1-1 Fan Speed Setting....................03-01 3-1-2 "AUTO" Position....................03-01 3-2 MASTER CONTROL....................03-02 3-2-1 Operation Mode Control..................03-02 3-2-2 Auto Changeover....................03-04 3-2-3 "COOL" Position....................03-05 3-2-4 "HEAT" Position....................03-05 3-3 LOUVER CONTROL....................03-06 3-4 ELECTRONIC EXPANSION VALVE CONTROL............

  • Page 5: Table Of Contents

    CONTENTS 5. APPENDING DATA 5-1 REFRIGERANT CIRCUIT..................05-01 5-2 WIRING DIAGRAM....................05-02 5-2-1 Indoor Unit......................05-02 5-2-2 Outdoor Unit......................05-18 5-3 CHARACTERISTICS OF SENSORS................ 05-19 05-19 5-3-1 Pressure sensor....................5-3-2 Thermistor resistance..................05-20 5-3-3 Saturation temperature and saturation pressure tables (R410A)......05-21 5-3-4 Temperature and pressure of refrigerant (Graph)..........
  • Page 7 1. TEST RUN...

  • Page 9: Test Run

    1. TEST RUN 1-1 EXECUTION PROCEDURE AND EXECUTION PRECAUTIONS Before execution Execution procedure and precautions Reason Do not install the units in the place not recommended in the installation The performance may drop significantly Location decision manual. due to the protection controlling Check the characteristics of the refrigerant used and grasp the Use of a refrigerant other than the Confirmation of Refrigerant used...
  • Page 10 Execution 2/2 Execution procedure and precautions Reason If taken from the air phase, since the Confirm the additional refrigerant amount with the installation Addition refrigerant charging manual, etc. composition of the refrigerant which is Always take the R410A refrigerant from the cylinder liquid phase charged will change, low performance and charge it using the gas phase.

  • Page 11: Test Run Method

    1-2 TEST RUN METHOD 1-2-1 Check Items Before Power ON Procedure Check contents Judgement standard Check Circuit breaker capacity Outdoor unit: 32A ( AJ*A36,45,54LALH ) Indoor unit: Leakage current: 30mA 0.1sec or less Install a breaker (Included with Earth Leakage Circuit Breaker) in accordance Power with the related laws and regulations.

  • Page 12: Check Items After Power On

    1-2-2 Check Items After Power ON [Note] Cooling test run for each refrigerant circuit. If multiple refrigerant circuits are test run at the same time, refrigerant circuit address setting errors cannot be detected. Procedure Check contents Judgement standard Check Outdoor unit circuit breaker ON Check lighting of Main PCB LED101 and 7-segment display.
  • Page 13 Procedure Check contents Judgement standard Check <Indoor unit service tool + actual measurement> Fan operation Shall be switched to all fan speeds in the cooling mode. Louver operation (except duct) Louver shall be switched to all positions. Shall also swing. Indoor unit Outlet air temperature Inlet air temperature and outlet air temperature difference shall be 10°C or...
  • Page 14 1-2-3 Automatic address setting for signal amplifiers When using signal amplifiers SWITCH POSITION POWER ERROR MODE 7 Segment LED101 LED102 LED Lamp (GREEN) (RED) LED105 LED104 MODE Outdoor unit printed circuit board SELECT ENTER Push button switch /EXIT SW107 SW108 SW109 When setting the address of the signal amplifier, please use the factory setting.
  • Page 15 1-2-4 Automatic address setting for Indoor units SWITCH POSITION POWER ERROR MODE 7 Segment LED101 LED102 LED Lamp (GREEN) (RED) LED105 LED104 MODE Outdoor unit printed circuit board SELECT ENTER Push button switch /EXIT Check that the rotary switch IU AD on the indoor unit Main PCB is set to “00”.If it is not set to “00”, it means the address of that device is not set.
  • Page 16 1-2-5 Indoor unit connection check SWITCH POSITION POWER ERROR MODE 7 Segment LED101 LED102 LED Lamp (GREEN) (RED) LED105 LED104 MODE Outdoor unit printed circuit board SELECT ENTER Push button switch /EXIT Please perform the indoor unit connection check according to following procedures. SW107 SW108 SW109...
  • Page 17 1-2-6 Test Run From Outdoor Main PCB All the indoor units connected to the outdoor unit can be test-operated by push button setting. SWITCH POSITION POWER ERROR MODE 7 Segment LED101 LED102 LED Lamp (GREEN) (RED) LED105 LED104 Outdoor unit printed circuit board MODE SELECT ENTER...

  • Page 18: Test Run From Remote Controller

    1-2-7 Test Run From Remote Controller UTY - RNK 1. Standard wired remote controller Stop the indoor unit. Push the button and button simultaneously for more than two seconds. The air conditioner will start to conduct a test run and " "...
  • Page 19 UTY-DCG Monitor - All 05/31 03:59 Monitor Select Group Setup Menu Coll Operation 25.0 •Ž Details Help Setup Menu 05/31 03:59 Central Controller Indoor unit Setting Special setting Indoor unit Special Setting 05/31 03:59 Test Operation Filter Sign Indoor Unit R.C.
  • Page 20 5. Touch panel controller UTY - DTG Test run operating procedure <Monitor screen (icon)> Monitor Mode Status: On 10/11.2008.Mar. 02:20 PM Setting Lange Group Down List Office A Office B PC Room Schedule Cool Heat Cool 21.5 C 21.0 C 26.0 C Restrant Entrance...
  • Page 21 <Setting screen> Operation Setting Status: On 10/11.2008.Mar. 02:20 PM Control Unit : Meeting Room R/C Prohibition operation Mode Set Temp. Fan Auto Auto 24.0 C On/Off High ( * ) Cool Mode Air Flow Direction Economy Temp. Anti Freeze Filter Sign Test Operation Heat Quiet...

  • Page 22: Test Run Control

    1-3 TEST RUN CONTROL 1. When the test run signal is transmitted from standard wired, wireless remote controller, simple remote controller, transmitted network, and outdoor unit. (1) The test run operation starts and the electric expansion valve is controlled to a maximum flow, regardless of the temperature condition.

  • Page 23: Field Setting And Monitor Mode List

    1-4 Field Setting And Monitor Mode List for Outdoor unit ITEM Classification Setting Mode Information contents CODE No. Push switch onoutdoor Device and Connected number of indoor unit The number of the communicating unit is displayed unit PCB system Software version of outdoor unit Monitor mode Software version : [ F1 ]...
  • Page 24 ITEM ITEM Setting Function Default Classification Setting Mode CODE No. CODE No. Install Pipe length setting 40-65m Push switch 0-40m on outdoor unit PCB 65-90m 90-120m Setting mode Setting is forbidden [ F2 ] Correction Sequential start shift Standard Setting is forbidden Cooling capacity shift Normal mode Save energy mode 1 (+2 °C )
  • Page 25 ITEM Setting Mode Setting Function CODE No. Forced operation Cooling test run Push switch on Forced thermostat-ON in Cooling. outdoor unit PCB Heating test run Forced thermostat-ON in Heating. Function mode [ F3 ] Test run stop Test run is stopped. Install and maintenance 1 Signal amplifier automatic address...
  • Page 26 1-5 Field Setting / Function Setting for Indoor unit ITEM ITEM Classification Setting Mode Default Setting Function CODE No. CODE No. Indoor unit field setting Indoor unit address 00~63 00~63 Address Refrigerant circuit address 00~99 00~99 setting by Filter Filter indicator Interval Default remote controller Longer...
  • Page 27 2. OUTDOOR UNIT OPERATION CONTROL...

  • Page 29: Input / Output List

    2. OUTDOOR UNIT 2-1 INPUT / OUTPUT LIST Input / output or kind of detail Control range Discharge pressure sensor <HIGH> Pressure sensor Measure range 0.0 to 5.0MPa Suction pressure sensor <LOW> Pressure sensor Measure range 0.0 to 1.7MPa Discharge temperature sensor <TH1>...

  • Page 30: Capacity Control

    2-2 COMPRESSOR OPERATION 2-2-1 Operation / Stop Condition When cooling requirement capacity or heating requirement capacity from either of the indoor units in the same refrigerant circuit is input, the compressor operates. When all the indoor units in no "cooling requirement capacity" or "heating requirement capacity", the compressor is stopped.

  • Page 31: Speed Range Of Start,Stop,And Operation

    (2) Target low-pressure and high-pressure control <Cooling> In order to make the evaporation pressure of the indoor unit at the proper pressure on a variety of operations, capacity of the compressor will be controlled by low-pressure sensor of the outdoor unit. <Heating>...
  • Page 32 (2) Heating starting process At the start of heating, the compressor is started by the following process. Compressor start-up to change the 4 way valve. Capacity control returns to normal control after the end of the starting process. (target high-pressure control) <...

  • Page 33: Cooling Operation

    2-3 FAN CONTROL 2-3-1 Cooling Operation Fan speed (rpm) Fan step AJ A36LALH AJ A45LALH AJ A54LALH Upper FAN Step Lower FAN Switching conditions of step The initial speed of the outdoor unit is detected by out door temperature sensor. Outside air temperature Fan step The fan is controlled to keep high puressure saturation temperature...

  • Page 34: Heating Operation

    2-3-2 Heating Operation Fan speed (rpm) Fan step AJ A36LALH AJ A45LALH AJ A54LALH Switching conditions of step The initial speed of the first boot outdoor unit is detected by outdoor air temperature sensor value (TAOUT). Outside air temperature Fan step sensor detected value TAOUT 10°C...

  • Page 35: Low Noise Mode

    2-3-3 Low noise mode When the low noise mode setting ON from PUSH SW or EXTERNAL INPUT, the outdoor unit operates in the low noise mode as follows. « » Settings and corresponding operations Capacity priority setting Low noise level setting Operation mode ( PUSH SW ) ( PUSH SW )

  • Page 36: Other Control

    2-3-4 Other Control To accurately detect the outside air temperature, the fan is operated while the outdoor unit is stopped. 2-4 EXPANSION VALVE CONTROL Control range Initialization Operation mode conditions operation stop Cooling 500 pulses 0 pulses EEV 1 When power 40 - 500 pulses Heating turned on...

  • Page 37: Special Operation

    2-5 SPECIAL OPERATION 2-5-1 Oil Recovery Operation Purpose of the operation The amount of refrigerant lubricant 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 increases. 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 38: Defrost Operation Control

    2-5-2 Pre-heat Operation This pre-heat operation protects the start up failure by preventing the refrigerant from soaking into the oil in compressor. Crankcase heater ON: 30 minutes elapsed since installed compressors stopped (However, ON when power turned on) OFF: Compressor starts *It doesn't control according to the temperature.

  • Page 39: Protective Function

    2-6 PROTECTIVE FUNCTION 2-6-1 Protective Function List Protective Function Operating Condition Operation Detect Parts COOL HEAT DISPLAY Discharge Temp Discharge Temp <Starting conditions> EEV of operating indoor unit gradually opened 3 minutes have elapsed since the start of operation and Protection 1 Thermistor (discharge temperature...
  • Page 40 Protective Function Operation Detect Parts Operating Condition DISPLAY COOL HEAT High Pressure High Pressure <Pattern starting condition> Compressor stopped High-pressure 4.00MPa Protection Stop 1 Sensor <Pattern reset condition> 5 minutes have elapsed and high-pressure 3.50MPa EA41 <Pattern starting condition> Compressor stopped Pattern generated 3 times within 60 minutes.
  • Page 41 Protective Function Operating Condition Operation Detect Parts COOL HEAT DISPLAY E941 Compressor is stopped when the over currernt protectioncircuit in the Compressor stopped Overcurrent Break Overcurrent inverter PCBoad detects an abnormal current duringthe operation. Stop Protection Circuit (permanent stop) If it repeated 5 times, the compressor becomes permanentstop. (Compressor) E931 Compressor is stopped when the over current protection circuit in the...
  • Page 43 3. INDOOR UNIT OPERATION...

  • Page 45: Fan Speed Setting

    3. INDOOR UNIT OPERATION 3-1 FAN CONTROL 3-1-1 Fan Speed Setting Fan speed setting Press the FAN CONTROL button to set the fan speed. AUTO HIGH 3-1-2 "AUTO" Position Fan speed zone 1. COOLING OPERATION The fan speed is determined automatically in accordance Hi zone with the condition "(T (corrected room temperature) - T...

  • Page 46: Master Control

    3-2 MASTER CONTROL 3-2-1 Operation Mode Control Each operation mode is controlled as below. (1) Stop mode Indoor fan motor : OFF Electric expansion valve : Stop pulse Drain pump : Turns ON-OFF by the drain pump control function (2) Cool, Dry and Heat Mode Cool Heat Indoor fan motor...
  • Page 47 Method 3. (Management by indoor unit) Operation mode management is made "Management by indoor unit" by outdoor unit PUSH-SW (field setting). Then the master indoor unit is set by wired remote controller. Thereupon the priority mode shifts to Cooling Priority or Heating Priority in accordance with input from the master indoor unit regardless of the current priority mode.

  • Page 48: Auto Changeover

    3-2-2 Auto Changeover [Method] 1. Switch operation mode management to "Management by indoor unit" by outdoor unit DIP-SW. 2. Set the master indoor unit by wired remote controller. 3. Judge cooling/heating by the difference between the master indoor unit's setting temperature and the room temperature.

  • Page 49: Cool" Position

    3-2-3 "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 + 0.5 C •...

  • Page 50: Louver Control

    3-3 LOUVER CONTROL (1) ADJUSTING THE DIRECTION OF AIR CIRCULATION Instructions relating to heating ( ) are applicable only to heat pump type outdoor unit. Begin air conditioner operation before performing this procedure. Vertical Air Direction Adjustment This instructions are applicable to "LARGE CEILING TYPE", "UNIVERSAL FLOOR/CEILING TYPE", "CASSETTE TYPE", "WALL MOUNTED TYPE"...
  • Page 51 Horizontal Air Direction Adjustment This instructions are applicable to "LARGE CEILING TYPE", "UNIVERSAL FLOOR/CEILING TYPE" and "WALL MOUNTED TYPE". Press the HORIZONTAL AIR FLOW DIRECTION SET button. Press the HORIZONTAL AIRFLOW DIRECTION button. The temperature display will change to the horizontal airflow direction setting display. Press the HORIZONTAL AIRFLOW DIRECTION button to change the horizontal louvre position.
  • Page 52 Instructions are applicable to "LARGE CEILING TYPE", "UNIVERSAL FLOOR / CEILING TYPE", "CASSETTE TYPE", "WALL MOUNTED TYPE", and "COMPACT WALL MOUNTED TYPE". About Vertical Airflow SWING Operation Air swing range The SWING operation may stop temporarily when the Air flow direction set Range of swing air conditioner's fan is not operating, or when operating at very low speeds.

  • Page 53: Operation Control

    3-4 ELECTRONIC EXPANSION VALVE CONTROL 1. Initialization When the power is turned ON. When it has passed the limited time since the last initialization. 2. Operation Control When indoor unit stopping Outdoor unit Condition EEV Condition Fully closed Cooling Fully closed Heating Slightly open When starting up...

  • Page 54: Auto Restart

    3-6 FUNCTION 3-6-1 Auto Restart The air conditioner restarts with the previous setting operation. 3-6-2 Icing Protection Control The icing of the indoor heat exchanger is prevented during the cooling and dry mode operation. (1) Starting Condition Compressor is operation more than 3 minutes. When "Heat exchanger inlet temperature "...

  • Page 55: Wireless Remote Controller

    3-7 TIMER CONTROL 3-7-1 Wireless Remote Controller UTY - LNH There are following 4 kinds of timer modes are available. ON Timer OFF Timer PROGRAM Timer SLEEP Timer 1. ON / OFF TIMER The timer functions cannot be used when this controller is used together with the remote controller (Wired type). A beeping sound is made when a signal is received.
  • Page 56 Sleep timer The sleep timer function automatically corrects the temperature thermostat setting according to the time setting to prevent excessive cooling and heating while sieeping. Cooling operation / dry operation Heating operation When the sleep timer is set, the set temperature When the sleep timer is set, the set temperature automatically rises 1°C every hour.The set sutomatically drops 1°C every 30 minutes.

  • Page 57: Group Remote Controller

    3-7-2 Group Remote Controller UTY - CGG Different schedules can be set for each day of the week. WEEKLY TIMER Four timers can be set for each day 1. WEEKLY TIMER The timer function is not available depending on the initial setting. Different schedules can be set for each day of the week.
  • Page 58 Operating setting Press the Start/Stop button or the Mode button or the Set Temperature button to set the operation. * For the operations that can be set, refer to "Operation mode setting", "Room tem- perature setting", and "To start /stop operation" , in "OPERATION". * Only the current operation settings are displayed.

  • Page 59: Wired Remote Controller

    3-7-3 Wired Remote Controller UTY - RNK ON / OFF TIMER WEEKLY TIMER TEMPERATURE SET BACK TIMER 1. ON / OFF TIMER The timer function is not available depending on the model. To set the ON/OFF timer SU MO TU WE TH FR SA Press the timer mode button to se- lect the ON timer or OFF timer.

  • Page 60: Weekly Timer

    2. WEEKLY TIMER The timer function is not available depending on the model. Weekly timer setting SU MO TU WE TH FR SA 3 6 9 12 15 18 21 Press the SET button for 2 sec- Press the timer mode button to select the weekly timer. onds or more.
  • Page 61 To start /cancel the WEEKLY timer operation To start To cancel The independent timer will flash on the display. Press the TIMER DELETE button to 3 6 9 12 15 18 21 cancel the timer mode. ex.Operating time 7:00-18:00 The timer mode can also be canceled Indpnd.

  • Page 62: Temperature Set Back Timer

    3. TEMPERATURE SET BACK TIMER The timer function is not available depending on the model. Temperature SET BACK timer setting SET BACK SU MO TU WE TH FR SA If there is no existing SET BACK tempera- ture setting, " - - " will be displayed for the 3 6 9 12 15 18 21 temperature.
  • Page 63 4. TROUBLE SHOOTING...

  • Page 64: Troubleshooting

    4. TROUBLESHOOTING 4-1 NORMAL OPERATION 4-1-1 Indoor Unit Display Indication type Indication Lamp Flashing Pattern Operation Continuous lighting Operation LED Anti Freeze Continuous lighting(lowered light) Timer Timer LED Continuous lighting(lowered light) Filter Filter LED Continuous lighting 1 sec 1 sec Operation LED Power Failure 1 sec...

  • Page 65: Outdoor Unit Display

    4-1-2 OUTDOOR UNIT DISPLAY Indication type 7 Segment LED Pattern Description Idling(stop) Blank Cooling Mode "C" OO "L" Heating Mode "H" EA "T" Refer to 02-10 page for operation. Oil Recovery Operation "O" IL "R" ECOVERY Defrost Operation Refer to 02-11 page for operation. "D"...

  • Page 66: Abnormal Operation

    4-2 ABNORMAL OPERATION 4-2-1 Indoor Unit Display Please refer the flashing pattern as follows. Trouble Error Contents Operation LED Timer LED Filter LED shooting Remote Controller 1 times flash 2 times flash Continuous flash Communication Error Network Communication Error 1 times flash 4 times flash Continuous flash Indoor Unit Parallel...

  • Page 67: Led Display

    4-2-2 Outdoor Unit Display LED display POWER LED101 POWER ERROR POWER MODE LED : on MODE 0.1sec 0.1sec ERROR LED : blink LED101 LED102 ERROR (GREEN) (RED) LED102 Operation button MODE SELECT ENTER EXIT SW107 SW108 SW109 ERROR transition Short press : less than 3 seconds Long press : more than 3 seconds Annunciation "Err."...

  • Page 68: Error Code List For Outdoor Unit

    4-2-3 Error Code List for Outdoor Unit Error Trouble Error Trouble Error Contents Error Contents Code shooting Code shooting - - - - Initial Setting Error 9 3 . 1 Inverter Compressor Start Up Error 9 4 . 1 Trip Detection 1 4 .

  • Page 69: Remote Controller Display

    4-2-4 Remote Controller Display << SIMPLE REMOTE CONTROLLER >> ERROR CODE DISPLAY Error code If an error occurs, the following display will be shown. “ “ will appear in the set room temperature display.) “ “ is displayed, immediately contact authorized service personnel.

  • Page 70: Error Code List For Simple And Wired Remote Controller

    4-2-5 Error Code List for Simple and Wired Remote Controller Error Trouble Error Trouble Error Contents Error Contents Code shooting Code shooting Remote Controller 9, 82 Room Temperature Sensor Error Communication Error Network Communication Error Indoor Unit Heat Ex. Sensor Error 5, 6 Scan Error Inddor Unit Fan Motor Error...

  • Page 71: Trouble Level Of System

    4-2-7 TROUBLE LEVEL OF SYSTEM << System Condition when Outdoor Unit Error is occurred >> Trouble Level System Condition Outdoor unit Condition Indicated on Indoor Unit. Not indicated on Indoor Unit. Not indicated on Peripheral Unit. Indicated on Peripheral. Indicated on Service Tool. Indicated on Service Tool.
  • Page 72 Trouble Level Outdoor unit Condition System Condition Not indicated on Indoor Unit. Indicated on Indoor Unit. Not indicated on Peripheral Unit. Indicated on Peripheral. Indicated on Service Tool. Indicated on Service Tool. >Abnormal (Not available) >High pressure abnormal >LED indication >Low pressure abnormal >Outdoor unit stops >Fan motor 1 lock error...

  • Page 74: Trouble Shooting

    4-3 TROUBLE SHOOTING 4-3-1 Trouble shooting with error code (INDOOR UNIT) Indicate or Display: Trouble shooting 1 Outdoor Unit : E.5 U.1 INDOOR UNIT Error Method: Indoor Unit : Operation LED 3 times Flash, Timer LED 2 Times Flash, Model Information Error Filter LED Continuous Flash.

  • Page 75: Trouble Shooting

    Indicate or Display: Trouble shooting 2 Outdoor Unit : E.5 U.1 INDOOR UNIT Error Method: Indoor Unit : Operation LED 3 times Flash, Timer LED 1 Times Flash, Filter LED Continuous Flash. Power Frequency Abnormal Error Code : 3 1 Detective Actuators: Detective details: Indoor Unit Controller PCB Circuit...
  • Page 76 Indicate or Display: Trouble shooting 3 Outdoor Unit : E.5 U.1 INDOOR UNIT Error Method: Indoor Unit : Operation LED 3 times Flash, Timer LED 2 Times Flash, EEPROM Access Abnormal Filter LED Continuous Flash. (Indoor Unit Main PCB Error) Error Code : 3 2 Detective details:...
  • Page 77 Indicate or Display: Trouble shooting 4 Outdoor Unit : E.5 U.1 INDOOR UNIT Error Method: Indoor Unit : Operation LED 4 times Flash, Timer LED 1 Times Flash, Room Temperature Sensor Error Filter LED Continuous Flash. Error Code : 4 1 Detective details: Detective Actuators: Indoor Unit Controller PCB Circuit...
  • Page 78 Indicate or Display: Trouble shooting 5 Outdoor Unit : E.5 U.1 INDOOR UNIT Error Method: Indoor Unit : Operation LED 4 times Flash, Timer LED 2 Times Flash, Filter LED Continuous Flash. Heat Exchanger Inlet Sensor Error Error Code : 4 2 Detective Actuators: Detective details: Indoor Unit Controller PCB Circuit...
  • Page 79 Indicate or Display: Trouble shooting 6 Outdoor Unit : E.5 U.1 INDOOR UNIT Error Method: Indoor Unit : Operation LED 4 times Flash, Timer LED 2 Times Flash, Filter LED Continuous Flash. Heat Exchanger Outlet Sensor Error Error Code : 4 2 Detective Actuators: Detective details: Indoor Unit Controller PCB Circuit...
  • Page 80 Indicate or Display: Trouble shooting 7 Outdoor Unit : E.5 U.1 INDOOR UNIT Error Method: Indoor Unit : Operation LED 5 times Flash, Timer LED 3 Times Flash, Filter LED Continuous Flash. Water Drain Abnormal Error Code : 5 3 Detective details: Detective Actuators: Indoor Unit Controller PCB Circuit...
  • Page 81 Indicate or Display: Trouble shooting 8 Outdoor Unit : E.5 U.1 INDOOR UNIT Error Method: Indoor Unit : Operation LED 5 times Flash, Timer LED 1 Times Flash, Filter LED Continuous Flash. Indoor Unit Fan Motor Error Error Code : 5 1 Detective details: Detective Actuators: When Indoor fan control is either phase control or DC control and rotation feed...
  • Page 82 Indicate or Display: Trouble shooting 9 Outdoor Unit : E.5 U.1 INDOOR UNIT Error Method: Indoor Unit : Operation LED 1 times Flash, Timer LED 2 Times Flash, Wired Remote Controller Filter LED Continuous Flash. Communication Error Error Code : 1 2 Detective Actuators: Detective details: Indoor unit controller PCB circuit...
  • Page 83 Indicate or Display: Trouble shooting 10 Outdoor Unit : E.5 U.1 INDOOR UNIT Error Method: Indoor Unit : Operation LED 1 times Flash, Timer LED 6 Times Flash, Indoor Unit Parallel Communication Filter LED Continuous Flash. Error Error Code : 1 6 Detective Actuators: Detective details: Indoor unit Controller PCB circuit...
  • Page 84 Indicate or Display: Trouble shooting 11 Outdoor Unit : E.5 U.1 INDOOR UNIT Error Method: Indoor Unit : Operation LED 1 times Flash, Timer LED 4 Times Flash, Filter LED Continuous Flash. Network Communication Error Error Code : 1 4 Detective Actuators: Detective details: Indoor unit Controller PCB circuit...
  • Page 85 4-3-2 Trouble Shooring With Error Code (OUTDOOR UNIT) Indicate or Display: Trouble shooting 12 Outdoor Unit : - - - - ( Flashing 0.5 sec. ON and OFF ) OUTDOOR UNIT Error Method: Indoor Unit : No Display Initial Setting Error Error Code : No Display Detective Actuators:...
  • Page 86 Indicate or Display: Trouble shooting 13 OUTDOOR UNIT Error Method: Outdoor Unit : E. 14. 1 Indoor Unit : No display Outdoor Unit Network Error Code : 14 Communication 1 Error Detective details: Detective Actuators: No communication for 180 seconds or more from an indoor unit which Outdoor unit Main PCB received communication once and no outdoor network communication error 2.
  • Page 87 Indicate or Display: Trouble shooting 14 Outdoor Unit : E. 14. 2 OUTDOOR UNIT Error Method : : Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Outdoor Unit Network Filter LED Continuous Flash. Communication 2 Error Error Code : 14 Detective Actuators:...
  • Page 88 Indicate or Display: Trouble shooting 15 Outdoor Unit : E. 62. 3 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Outdoor Unit EEPROM Access Error Filter LED Continuous Flash. Error Code : 62 Detective Actuators: Detective details:...
  • Page 89 Indicate or Display: Trouble shooting 16 Outdoor Unit : E. 62. 6 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Inverter Communication Error Filter LED Continuous Flash. Error Code : 62 Detective Actuators: Detective details: Communication not received from Inverter PCB for 10 seconds or more...
  • Page 90 Indicate or Display: Trouble shooting 17 Outdoor Unit : E. 62. 8 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, EEPROM Data corrupted Error Filter LED Continuous Flash. Error Code : 62 Detective Actuators: Detective details: Set contents sum value memorized in EEPROM and sum value calculated...
  • Page 91 Indicate or Display: Trouble shooting 18 Outdoor Unit : E. 63. 1 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Inverter Error Filter LED Continuous Flash. Error Code : 63 Detective Actuators: Detective details: Inverter PCB Error information received from Inverter PCB...
  • Page 92 Indicate or Display: Trouble shooting 19 Outdoor Unit : E. 67. 2 OUTDOOR UNIT Error Method: Indoor Unit : No Display Inverter PCB short interruption detection Error Code : 67 Detective Actuators: Detective details: Inverter PCB ''Momentary power failure" received from Inverter PCB Forecast of Cause : 1.
  • Page 93 Indicate or Display: Trouble shooting 20 Outdoor Unit : E. 69. 1 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Outdoor Unit transmission PCB Filter LED Continuous Flash. Parallel Communication Error Error Code : 69 Detective Actuators:...
  • Page 94 Indicate or Display: Trouble shooting 21 Outdoor Unit : E. 71. 1 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Discharge Temp Sensor Error Filter LED Continuous Flash. Error Code : 71 Detective Actuators: Detective details: Discharge temperature thermistor 1 short detected...
  • Page 95 Indicate or Display: Trouble shooting 22 Outdoor Unit : E. 72. 1 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Compressor Temp Sensor Error Filter LED Continuous Flash. Error Code : 72 Detective Actuators: Detective details: Compressor temperature thermistor 1 short detected...
  • Page 96 Indicate or Display: Trouble shooting 23 Outdoor Unit : E. 73. 3 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Outdoor Unit Heat Ex. Liquid Temp. Filter LED Continuous Flash. Sensor Error Error Code : 73 Detective Actuators:...
  • Page 97 Indicate or Display: Trouble shooting 24 Outdoor Unit : E. 74. 1 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Outdoor Temp Sensor Error Filter LED Continuous Flash. Error Code : 74 Detective Actuators: Detective details: Outdoor temperature thermistor short or open detected...
  • Page 98 Indicate or Display: Trouble shooting 25 Outdoor Unit : E. 75. 1 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Filter LED Continuous Flash. Suction Gas Temp Sensor Error Error Code : 75 Detective Actuators: Detective details:...
  • Page 99 Indicate or Display: Trouble shooting 26 Outdoor Unit : E. 77. 1 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Heat Sink Temp Sensor Error Filter LED Continuous Flash. Error Code : 77 Detective Actuators: Detective details:...
  • Page 100 Indicate or Display: Trouble shooting 27 Outdoor Unit : E. 82. 1 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Sub-cool Heat EX. Gas Inlet Filter LED Continuous Flash. Temp Sensor Error Error Code : 82 Detective Actuators:...
  • Page 101 Indicate or Display: Trouble shooting 28 Outdoor Unit : E. 82. 2 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Sub-cool Heat EX. Gas outlet Filter LED Continuous Flash. Temp Sensor Error Error Code : 82 Detective Actuators:...
  • Page 102 Indicate or Display: Trouble shooting 29 Outdoor Unit : E. 83. 2 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, SC.HE. Liquid Outlet Sensor Error Filter LED Continuous Flash. Error Code : 83 Detective Actuators: Detective details:...
  • Page 103 Indicate or Display: Trouble shooting 30 Outdoor Unit : E. 84. 1 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Current Sensor Error Filter LED Continuous Flash. Error Code : 84 Detective Actuators: Detective details: "Protection stop by "inverter speed...
  • Page 104 Indicate or Display: Trouble shooting 31 Outdoor Unit : E. 86. 1 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Discharge Pressure Sensor Error Filter LED Continuous Flash. Error Code : 86 Detective Actuators: Detective details: When any of the following conditions is satisfied, a discharge pressure...
  • Page 105 Indicate or Display: Trouble shooting 32 Outdoor Unit : E. 86. 3 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Suction Pressure Sensor Error Filter LED Continuous Flash. Error Code : 86 Detective details: Detective Actuators: When any of the following conditions is satisfied, a suction pressure...
  • Page 106 Indicate or Display: Trouble shooting 33 Outdoor Unit : E. 86. 4 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, High Pressure Switch Error Filter LED Continuous Flash. Error Code : 86 Detective Actuators: Detective details: High pressure switch...
  • Page 107 Indicate or Display: Trouble shooting 34 Outdoor Unit : E. 93. 1 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Inverter Compressor Start UP Error Filter LED Continuous Flash. Error Code : 93 Detective details: Detective Actuators:...
  • Page 108 Indicate or Display: Trouble shooting 35 Outdoor Unit : E. 94. 1 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Trip Detection Filter LED Continuous Flash. Error Code : 94 Detective details: Detective Actuators: Inverter PCB "Protection stop by "overcurrent generation after inverter compressor start...
  • Page 109 Indicate or Display: Trouble shooting 36 Outdoor Unit : E. 95. 5 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Compressor Motor Loss of Filter LED Continuous Flash. Synchronization Error Code : 95 Detective details: Detective Actuators:...
  • Page 110 Indicate or Display: Trouble shooting 37 Outdoor Unit : E. 97. 1 ( FAN 1 ) , E. 98. 1 ( FAN 2 ) OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Outdoor Unit Fan Motor Lock Error Filter LED Continuous Flash.
  • Page 111 Indicate or Display: Trouble shooting 38 Outdoor Unit : E. 97. 4 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Outdoor unit Fan motor undervoltage Filter LED Continuous Flash. - Lack of DC Voltage - Error Code : 97 Detective details:...
  • Page 112 Indicate or Display: Trouble shooting 39 Outdoor Unit : E. 97. 5 (FAN1), E. 98. 5 (FAN2) OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Outdoor Unit Fan Motor 1 Temp. Abnormal Filter LED Continuous Flash.
  • Page 113 Indicate or Display: Trouble shooting 40 Outdoor Unit : E. 9A. 1 ( EEV1), E. 9A. 2 ( EEV2) OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Coil EEV1 Error Filter LED Continuous Flash. Coil EEV2 Error Error Code : 9A...
  • Page 114 Indicate or Display: Trouble shooting 41 Outdoor Unit : E. A1. 1 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Discharge Tempreture Abnormal Filter LED Continuous Flash. Error Code : A1 Detective details: Detective Actuators: Discharge temperature thermistor...
  • Page 115 Indicate or Display: Trouble shooting 42 Outdoor Unit : E. A3. 1 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Compressor Tempreture Abnormal Filter LED Continuous Flash. Error Code : A3 Detective details: Detective Actuators: "Protection stop by "compressor tempreture"...
  • Page 116 Indicate or Display: Trouble shooting 43 Outdoor Unit : E. A4. 1 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, High Pressure Abnormal Filter LED Continuous Flash. Error Code : A4 Detective details: Detective Actuators: Judgment from value sensed by discharge...
  • Page 117 Indicate or Display: Trouble shooting 44 Outdoor Unit : E. A4. 2 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, High Pressure Protection 1 Filter LED Continuous Flash. Error Code : A4 Detective details: Detective Actuators: High pressure switch 1...
  • Page 118 Indicate or Display: Trouble shooting 45 Outdoor Unit : E. A5. 1 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Low Pressure Abnormal Filter LED Continuous Flash. Error Code : A5 Detective details: Detective Actuators: Suction pressure sensor...
  • Page 119 Indicate or Display: Trouble shooting 46 Outdoor Unit : E. 28. 1 OUTDOOR UNIT Error Method: Indoor Unit : No Display Auto Address Setting Error Error Code : 28 Detective details: Detective Actuators: When none of the connected indoor units answers during auto address Outdoor unit Main PCB And when abnormal answer signal is input.
  • Page 120 Indicate or Display: Trouble shooting 48 Outdoor Unit : E.1 4.5 OUTDOOR UNIT Error Method: Indoor Unit : No display The number of Indoor unit shortage Error Code : No display Detective Actuators: Detective details: Indoor unit Controller PCB circuit When the indoor unit number decreases for 180 seconds from the memorized Indoor unit Communication PCB maximum indoor units number after power(Breaker) ON.

  • Page 121: Trouble Shooting With No Error Code

    TROUBLE SHOOTING WITH NO ERROR CODE Trouble shooting 49 Forecast of Cause : Indoor Unit - No Power 1. Power Supply failure 2. Outside cause 3. Electrical Component defective Check Point 1 : Check Installation Condition Is not the breaker down? Check loose or removed connection cable.
  • Page 122 Trouble shooting 50 Forecast of Cause : Outdoor Unit - No Power 1. Power Supply failure 2. Outside cause 3. Electrical Components defective Check Point 1 : Check Installation Condition Isnt the breaker down? Check loose or removed connection cable. >>If abnormal condition is found, correct it by referring to Installation Manual or Data &...
  • Page 123 Trouble shooting 51 Forecast of Cause : 1. Setting/Connection failure 2. Outside cause No Operation (Power is ON) 3. Electrical Component defective Check Point 1 : Check indoor and outdoor installation condition Indoor Unit - Check incorrect wiring between Indoor Unit - Remote Control, or terminals between Indoor Units. Or, check if there is an open cable connection.
  • Page 124 Trouble shooting 52 Forecast of Cause : No Cooling 1. Indoor Unit error 2. Outdoor Unit error 3. Effect by Surrounding environment 4. Connection Pipe / Connection Wire failure 5. Refrigeration cycle failure Check Point 1 : Check Indoor Unit Does Indoor Unit FAN run on HIGH FAN? Is Air Filter dirty? Is Heat Exchanger clogged?

  • Page 125: Abnormal Noise

    Trouble shooting 53 Forecast of Cause : 1. Abnormal installation (Indoor/Outdoor) 2. Fan failure(Indoor/Outdoor) Abnormal Noise 3. EEV failure (Indoor) 4. Compressor failure (Outdoor) Diagnosis method when Abnormal Noise is occurred Abnormal noise is coming from Indoor Unit Abnormal noise is coming from Outdoor Unit (Check and correct followings) (Check and correct followings) Is Main Unit installed in stable condition?

  • Page 126: Trouble Shooting For Optional Parts

    4-3-3 Trouble Shooting for Optional Parts 1. External Switch Controller (UTY-TEKX) Trouble shooting 55 Error Contents : Symptom : Power Supply Error No operation & LED does not light up. Condition : 1. No power supply. Voltage error between red and black terminals of External Switch Controller. (Normal voltage: 12V plus minus 10%) 2.
  • Page 127 Trouble shooting 56 Error Contents : Symptom : LED repeats flashing 0.5sec ON & 1.0sec OFF. Transmission Error Condition : Normal communication with Indoor unit has been suspended for longer than 1 minute. Cause 1 : DIP switch setting defective Cause 3 : Ext.

  • Page 128: Communication Error

    2. Signal Amplifier (UTY-VSGX) Trouble shooting 58 Error Contents : Symptom : No display Power Supply Error Details : Condition of occurrence : Normal power is not supplied. 7 segment indicator is defective. Release condition : Normal power is supplied. 7 segment indicator is normal. Cause 1 : Power supply cable installation is defective or open.

  • Page 129: Address Setting Error

    Trouble shooting 60 Symptom : Error Contents : Error display [ 2 6 ] Address Setting Error No operation. Details : Condition of occurrence : Address is not set at Signal Amplifier. Release condition : Address setting mode is started up, and desired address has been set up. Cause 1 : External noise Cause 2 : Address is not set at Signal Amplifier.
  • Page 130 Trouble shooting 62 Symptom : Error Contents : Error display [ D9 (Flashing or Lighting) ] Communication Error B No operation. Details : Condition of occurrence : Communication error between CPU and Network Driver IC (CH_B side). Network Driver IC is defective. Release condition : Communication is normal between CPU and Network Driver IC (CH_B side).
  • Page 131 3. Network Convertor (UTY-VGGX) 1. When connecting a group remote controller to a network convertor Trouble shooting 64 Error Contents : Symptom : No display Power Supply Error Details : Condition of occurrence : Normal power is not supplied. 7 segment indicator is defective. Release condition : Normal power is supplied.
  • Page 132 Trouble shooting 66 Error Contents : Symptom : Communication Error Error Code display [ 1 2 ] Control/Display from Group Remote is not available. with Group Remote Controller Details : Condition of occurrence : The communication between Group Remote and Network Convertor was not normally performed. Release condition : When the communication between Group Remote and Network Convertor resumes normal operation.
  • Page 133 Trouble shooting 67 Symptom : Error Contents : Error Code display [ C A ] Software Error All the control items do not operate. Other Controls are left they are. Details : Condition of occurrence : Micon program performed an abnormal control. Error of inside information of EEPROM.
  • Page 134 3. Network Convertor (UTY-VGGX) 2. When connecting a single split type indoor unit to a network convertor Trouble shooting 69 Error Contents : Symptom : No display Power Supply Error Details : Condition of occurrence : Normal power is not supplied. 7 segment indicator is defective. Release condition : Normal power is supplied.
  • Page 135 Trouble shooting 71 Error Contents : Symptom : Communication Error Error Code display [ 1 2 ] Control/Display from Standard Remote s not available. Other controls are left as they are. with Standard Remote Controller Details : Condition of occurrence : The communication between Standard Remote Controller and Network Convertor was not normally performed.
  • Page 136 Trouble shooting 72 Error Contents : Symptom : Communication Error Error Code display [ 1 6 ] All the control items do not operate. with Indoor Unit Details : Condition of occurrence : The communication between Indoor unit and Network Convertor was not performed normally. Release condition : When the communication with Indoor unit is resumed normally.
  • Page 137 Trouble shooting 73 Error Contents : Symptom : Communication Error Error Code display [ 2 6 ] with Indoor Unit All the control items do not operate. Details : Condition of occurrence : The communication between Indoor unit and Network Convertor was not performed normally. Release condition : When the communication with Indoor unit is resumed normally.
  • Page 138 Trouble shooting 74 Symptom : Error Contents : Error Code display [ C A ] Software Error All the control items do not operate. Other Controls are left they are. Details : Condition of occurrence : Micon program performed an abnormal control. Error of inside information of EEPROM.
  • Page 139 4. Group Remote Controller (UTY-CGGY / CGGG) Trouble shooting 76 Symptom : Error Contents : Error Code display [ C 4 ] PCB Error OPERATION LED is flashing. Details : Condition of occurrence : When EEPROM can not be written, or the control port does not operate. Release condition : Power is reset.
  • Page 140 Trouble shooting 77 Symptom : Error Contents : Error Code display [ 1 2 ] Connection Error OPERATION LED is flashing. Details : Condition of occurrence : The valid signal has not been received from the convertor more than 90 seconds after the communication line became valid. Release condition : Valid signal is received from Convertor.
  • Page 141 Trouble shooting 79 Symptom : Error Contents : Error Code display [ 1 5 ] System Error OPERATION LED is flashing. Details : Condition of occurrence : 1. Registration started within 4 minutes after power ON 2. Indoor unit refrigerant system registered at controller connect ed to converter reached 3 or more ([26] error generated at converter) 3.
  • Page 142 Trouble shooting 80 Symptom : Error Contents : Error Code display [ 1 4 ] Transmission Error OPERATION LED is flashing. Details : Condition of occurrence : When the signal is cut off for more than 10 minutes from the registered Indoor unit (not including Slave unit). Release condition : 1.
  • Page 143 6. Wired(UTY-RNK ) and Simple Remote Controller (UTY-RSK ,RHK ) Trouble shooting 82 Symptom : Error Contents : Error Code display [ 1 2 ] Indoor Unit Remote Controller Communication Error Details : Condition of occurrence : When signal from indoor unit does not enter t enter Release condition : When signal from indoor unit entered Cause 1 : Check connection...
  • Page 144 Trouble shooting 83 Symptom : Error Contents : Error Code display [ 1 5 ] Incompatible Indoor Unit is Connected Details : Condition of occurrence : When information was not obtained from indoor unit Release condition : When information was obtained from indoor unit or unit Cause 1 : Check remote controller master/slave setting.
  • Page 145 7. System Controller (UTY-APGX) / Service Tool (UTY-ASGX) / Web Monitoring Tool (UTY-AMGX) (Referred to as "Service Tool" hereafter) Trouble shooting 84 Symptom : Error Contents : 1 or more units (but not all) are not detected after Scan. Unit Not Detected 1 or more units (but not all) are not listed in the system list after Scan.
  • Page 146 4-5 SERVICE PARTS INFORMATION SERVICE PARTS INFORMATION 1 Compressor Diagnosis method of Compressor (If Outdoor Unit 7 segment LED displays Error, refer to Trouble shooting ) Abnormal noise Does not start up Stops soon after starting up Check power supply Check power supply voltage,open Is any Indoor Unit in operation? voltage,open fuse.

  • Page 147: Service Parts Information

    SERVICE PARTS INFORMATION 2 Inverter Compressor Check Point 1 : Check Connection Check terminal connection of Compressor (loose or incorrect wiring) Check connection of Inverter PCB (Loose or incorrect wiring) Terminal cover opened TM403 (BLACK) Inverter PCB TM404 (RED) TM405 (WHITE) BLACK WHITE...
  • Page 148 SERVICE PARTS INFORMATION 3 Main PCB Filter PCB Check Filter PCB -1 Is Fuse (5A/250V) open? Check Filter PCB -2 Replace Filter PCB PCB pattern and parts on PCB defective? Check Filter PCB -3 Replace Filter PCB (1) Replace blown fuse. (2) Disconnect all the connection wires between the Filter PCB - Main PCB.
  • Page 149 SERVICE PARTS INFORMATION 4 Inverter PCB Filter PCB Check Filter PCB -1 (1) Using a tester, measure the resistance value of both ends of the fuses (P501). (*Cannot be checked visually.) Is Fuse (45A/500V) open? Check Filter PCB -2 Replace Filter PCB PCB pattern and parts on PCB defective? Check Filter PCB -3 Replace Filter PCB...
  • Page 150 SERVICE PARTS INFORMATION 5 (Mounted on Inverter PCB) Check Point 1 Disconnect the connection wires between the Inverter PCB - ACTPM and Inverter PCB - Inverter Compressor. Set the tester to the "Resistance" mode, and measure the resistance between the following terminals. Yellow wire (P) - Fasten terminals U/V/W Blue wire (N) - Fasten terminals U/V/W...
  • Page 151 SERVICE PARTS INFORMATION 6 Choke Coil (INV) Reactor assy (DC Fan) Check Point 1 : Appearance check No fissures, breaks, damage, etc. at the body and winding section, terminals section? Check Point 2 : Electric check Choke Coil (INV) Reactor assy (DC Fan) Set the tester to the "Resistance"...
  • Page 152 SERVICE PARTS INFORMATION 7 Terminal Check Point 1 : Appearance check No fissures, breaks, damage, etc. at the body and terminals section? Not clogged with foreign matter? Are there no abnormalities at threaded parts (Stripped threads, deformation, damage, etc.) ? Check Point 2 : Electric check No short between adjacent terminals? Conducts before and after same terminal?
  • Page 153 SERVICE PARTS INFORMATION 8 Indoor Unit Electronic Expansion Valve (EEV) Check Point 1 : Check Connections Check Connectors (Loose connector or open cable.) Duct Small Wall mount Floor/ Ceiling, Ceiling Cassette Wall mount Check Point 2 : Check Coil of EEV Remove connector, check each winding resistance of Coil.
  • Page 154 Check Point 5 : Check Opening and Closing Operation of Valve When Valve is closed, If it is open, it has no temp. difference between Inlet and Outlet. it has a temp. difference between Inlet and Outlet. OPEN CLOSE Example : Hot GUS Example : Hot GUS Pipe (In) Pipe (In)
  • Page 155 SERVICE PARTS INFORMATION 9 Outdoor Unit Electronic Expansion Valve (EEV1) Check Point 1 : Check Connections Check connection of connector (CN116) (Loose connector or open cable) BLUE EEV1 ORANGE YELLOW WHITE BLUE EEV2 ORANGE YELLOW WHITE Check Point 2 : Check Coil of EEV1 Check Point 3 : Check Voltage from Controller PCB Remove connector, check each winding resistance of Coil.
  • Page 156 SERVICE PARTS INFORMATION 10 Outdoor Unit Electronic Expansion Valve (EEV2) Check Point 1 : Check Connections Check connection of connector (CN117) (Loose connector or open cable) BLUE EEV1 ORANGE YELLOW WHITE BLUE EEV2 ORANGE YELLOW WHITE Check Point 2 : Check Coil of EEV2 Check Point 3 : Check Voltage from Controller PCB Remove connector, check each winding resistance of Coil.

  • Page 157: Normal Operation

    SERVICE PARTS INFORMATION 11 Outdoor Unit Solenoid Valve (SV2) Check Point 1 : Check connections Check Point 2 : Check Solenoid Coil Remove connector and check if coil is open. Check connection of connector. (Normal resistance value of each coil: 1495 ± 7% (Loose connector or open cable) >>...
  • Page 158 SERVICE PARTS INFORMATION 12 4-WAY VALVE Check Point 1 : Check Circuit connection Check Point 2 : Check Solenoid Coil Check the connection of connector CN 105 Remove CN6 from PCB and check the resistance value of coil Resistance Value BLUE SOLENOID COIL 4WV 1.7K...
  • Page 159 SERVICE PARTS INFORMATION 13 Indoor Unit Fan Motor Check Point : ARXB24LATH (Low Static pressure Duct Type) Check each winding resistance of the motor If Resistance value is abnormal, replace motor. BLUE (S-Lo) Lead wire Resistance value White Red 44.8 VIOLET (Low) 37.3 Black...
  • Page 160 Check Point : ARXA24/ 30LATH (Duct Type) Check each winding resistance of the motor If Resistance value is abnormal, replace motor. BLUE (S-Lo) Lead wire Resistance value White Red 47.1 VIOLET (Low) Black 27.4 PINK (Med) Thermal protector Pink 8.00 150°C RED (Hi) Pink...
  • Page 161 Check Point : ARXB07LALH (Compact Duct Type) Check each winding resistance of the motor If Resistance value is abnormal, replace motor. BLUE (S-Lo) Lead wire Resistance value White Red VIOLET (Low) Black PINK (Med) Thermal protector Pink 140°C RED (Hi) Pink Violet BLACK...
  • Page 162 Check Point : ARXB14LALH (Compact Duct Type) Check each winding resistance of the motor If Resistance value is abnormal, replace motor. BLUE (S-Lo) Lead wire Resistance value White Red 136.5 VIOLET (Low) Black 125.6 PINK (Med) Thermal protector Pink 23.7 140°C RED (Hi) Pink...
  • Page 163 Check Point : AB*A12/ 14LATH (Floor/ Ceiling Type) Check each winding resistance of the motor If Resistance value is abnormal, replace motor. BLUE (Low) Lead wire Resistance value VIOLET (Med) White Red Thermal protector 150°C RED (Hi) Black 59.5 Violet (AC) BLACK Violet...
  • Page 164 Check Point : ARXC36LATH (High Static Pressure Duct Type) Check each winding resistance of the motor If Resistance value is abnormal, replace motor. BLUE (Low) Lead wire Resistance value VIOLET (Med) White Red 13.4 Thermal protector 150°C RED (Hi) Black 16.9 Violet 11.5...
  • Page 165 Check Point : AS A18 / 24 / 30 LATH(Wall Mounted Type) Check each winding resistance of the motor If Resistance value is abnormal, replace motor. BLUE (Low) Lead wire Resistance value RED (Hi) BLACK White Red (AC) YELLOW Blue Black 25.5 Blue...
  • Page 166 SERVICE PARTS INFORMATION 14 Discharge Pressure Sensor Suction Pressure Sensor 1. Discharge Pressure Sensor Check Point : Check Voltage from Main PCB With the connector connected to the PCB, measure the voltage between CN118:2-3 of the Main PCB. PRESSURE WHITE SENSOR BLACK (HIGH)
  • Page 167 SERVICE PARTS INFORMATION 15 Pressure switch Type of contact Pressure Characteristics of pressure switch Pressure switch (For Inverter comp.) 4.2 0.1MPa Contact : Short Open Contact : Open Short 3.2 0.15MPa 04-105...
  • Page 168 SERVICE PARTS INFORMATION 16 Thermistor Check Point : Check Thermistor resistance value Remove connector and check Thermistor resistance value. Resistance Value [ k ] Temperature [°C] Thermistor A Thermistor B Thermistor C - 20 105.4 - 10 27.8 58.2 21.0 44.0 168.6 16.1...
  • Page 169 SERVICE PARTS INFORMATION 17 ACTPM (Active Filter Module) Check Point 1 : Appearance check No fissures, breaks, damage, etc. at the body and terminals section? Check Point 2 : Electric check Disconnect the connection wires. Set the tester to the "Resistance" mode, and measure the resistance between the following terminals.
  • Page 171 5. APPENDING DATA (UNIT)

  • Page 173: Refrigerant Circuit

    5-1 REFRIGERANT CIRCUIT MODELS : AJ A36, 45, 54 LALH Outdoor unit EEV2 FAN1 FAN2 SC HEX EEV1 HPSW TH10 Indoor unit1 TH21 FAN21 TH23 EEV21 TH22 LIQUID LINE HEX21 GAS LINE Indoor unit2 TH21 FAN21 TH23 EEV21 TH22 HEX21 Outdoor unit Indoor unit TH1: Discharge temp.

  • Page 174: Wiring Diagram

    5-2 WIRING DIAGRAM 5-2-1 Indoor Unit MODELS : AUXB07, AUXB09, AUXB12, AUXB14, AUXB18, AUXB24 05-02...
  • Page 175 MODELS : AUXD18, AUXD24, AUXA30, AUXA36, AUXA45, AUXA54 05-03...
  • Page 176 MODELS : ARXB07, ARXB09, ARXB12, ARXB14, ARXB18 05-04...
  • Page 177 MODEL : ARXB24 MODELS : ARXB30, ARXB36 05-05...
  • Page 178 MODEL : ARXB45 05-06...
  • Page 179 MODEL : ARXA24 MODELS : ARXA30, ARXA36, ARXA45 05-07...
  • Page 180 MODELS : ARXC36, ARXC45, ARXC60 MODELS : ARXC72, ARXC90 05-08...
  • Page 181 MODELS : ARXD07, ARXD09, ARXD12, ARXD14, ARXD18, ARXD24 05-09...
  • Page 182 MODELS : AB A12, AB A14, AB A18, AB A24 05-10...
  • Page 183 MODELS : AB A12LBTH, AB A14LBTH AB A18LBTH, AB A24LBTH 05-11...
  • Page 184 MODELS : AB A30, AB A36, AB A45, AB A54 05-12...
  • Page 185 MODELS : AB A30LBTH, AB A36LBTH AB A45LBTH, AB A54LBTH 05-13...
  • Page 186 MODELS : AS A07, AS A09, AS A12, AS A14 05-14...
  • Page 187 MODELS : AS E07, AS E09, AS E12, AS E14 05-15...
  • Page 188 MODELS : AS A18, AS A24, AS A30 05-16...
  • Page 189 MODELS : AS A18LACH, AS A24LACH, AS A30LACH 05-17...

  • Page 190: Outdoor Unit

    5-2-2 Outdoor Unit MODELS : AJ A36,45,54LALH 05-18...

  • Page 191: Characteristics Of Sensors

    5-3 CHARACTERISTICS OF SENSORS 5-3-1 Pressure senser 1. Discharge Pressure Sensor - Pressure Sensor (HIGH): CN118 - With the connector connected to the PCB, measure the voltage between CN118 : 2-3 of the Main PCB. 5.00 Pressure [MPa] Pressure 0.00 0.10 0.20 0.30...

  • Page 192: Thermistor Resistance

    5-3-2 Thermistor resistance Thermistor resistance value <Outdoor unit side> Temperature Resistance Value [ k ] [°C] Thermistor A Thermistor B Thermistor C - 20 105.4 - 10 27.8 58.2 21.0 44.0 168.6 16.1 33.6 129.8 12.4 25.9 100.9 20.2 79.1 15.8 62.6 12.5...

  • Page 193: Saturation Temperature And Saturation Pressure Tables (R410A)

    5-3-3 Saturation temperature and saturation pressure tables (R410A) (Pressure: Gauge pressure) Saturation pressure (Mpa) Saturation pressure (Mpa) Saturation temperature (°C) Saturation Temp. Temp. pressure (°C) (°C) (Mpa) Saturated liquid Saturated gas Saturated liquid Saturated gas Saturated liquid Saturated gas 0.1722 0.1717 1.275 1.270...

  • Page 194: Temperature And Pressure Of Refrigerant (Graph)

    5-3-4 Temperature and pressure of refrigerant (Graph) Saturated liquid temperature (°C) 05-22...
  • Page 195 6. DISASSEMBLY PROCESS...
  • Page 197 6. DISASSEMBLY PROCESS WARNING Before servicing the unit, turn the power supply switch OFF, Then, do not touch electric parts for 10 minutes due to the risk of electric shock. 1. Appearance 2. SERVICE PANEL removal Hooks (3 places) Screws (serrated) Remove the mounting screws.
  • Page 198 4. MAIN PCB removal Caution Be careful about position of Fan motor connector when you exchange Main PCB or Fan motor by the repair. Spacers For Upper Fan motor (CN102) For Lower Fan motor (CN150) Terminal Earth screw Remove the communication cable connected to the terminal. Remove the earth screw.
  • Page 199 6. INVERTER PCB, FILTER PCB and ACTPM removal Screws Remove the 4 mounting screws Open the CONTROL BOX (MAIN). ACTPM FILTER PCB INVERTER PCB 6-1. FILTER PCB removal Screws (AC IN) Spacers Earth screw Remove the connectors and screws. Remove the spacers. (8 places) Note the tightening torque at the installation.
  • Page 200 6-2. INVERTER PCB removal Screws (For Diode Bridge) Hook Spacers Screws (For IPM) Remove the 4 mounting screws. Remove the connectors and spacers. For screws of IPM. Note the tightening torque at the installation. 1. Temporary tightening : 0.2 to 0.4N m 2.
  • Page 201 7. PRESSURE SENSOR, SOLENOID COIL removal Pressure Sensor Solenoid Coil Solenoid Coil (Low Pressure) (Solenoid Valve) (4-way valve) Pressure Switch Pressure Sensor (High Pressure) 7-1. PRESSURE SENSOR removal CAUTION Wear gloves to prevent the frostbite, because a small amount of refrigerant leaks during work. Remove the PRESSURE SENSOR with wrench.
  • Page 202 7-2. SOLENOID COIL (Solenoid valve) removal Remove the mounting screw. Remove the SOLENOID COIL. 7-3. SOLENOID COIL (4way valve) removal Remove the mounting screw Remove the SOLENOID COIL. with wrench or short screwdriver. 8. EEV COIL removal Remove the EEV coil by hand. Be careful so as not to bend the pipe.
  • Page 203 10. FAN MOTOR removal Screws Hooks Screws Remove the nut. Remove the FAN GUARD And remove the PROPELLER FAN. by sliding upward. Note at the installation. Insert propeller Fan and Moter shaft reference D cutting position. And the tightening torque at the installation. Remove the 4 mounting screws.
  • Page 204 11. TOP PANEL removal Screws Screws (with washer) (with washer) Screw (serrated) Remove the mounting screws. Remove the TOP PANEL. 12. CHOKE COIL removal Screw BRACKET CONTROL BOX Screws DUCT A Remove the mounting screw. Remove the mounting screws. Remove the BRACKET CONTROL BOX. Connectors Hook Screws...
  • Page 205 14. PIPE COVER REAR removal Screws Hook (with washer) Remove the mounting screws. Remove the PIPE COVER REAR. 15. RIGHT PANEL removal Screws Screws Remove the mounting screws. Remove the RIGHT PANEL by sliding upward. 06-09...

  • Page 206: Compressor Removal

    16. COMPRESSOR removal Precautions for exchange of Compressor. Do not allow moisture or debris to get inside refrigerant pipes during work. Procedure for compressor removal. (1) Turn off power. (2) Remove the SERVICE PANEL and PIPE COVER FRONT. (3) Fully open the 3WAY VALVE(Gas) and 3WAY VALVE(Liquid). (4) Open the EEVs of Outdoor units and Indoor units by vaccuming mode.
  • Page 207 Compressor wire Thermistor (Discharge) Terminal Cover Cut the binder, and Remove the Thermistor(Discharge). remove the heat insulation. Hook Thermistor (Comp.temp.) HEATER (CRANK CASE) Remove the Thermistor(Comp.temp.) and Thermistor(Discharge). Remove the Terminal Cover and Compressor wire. Loose the HEATER (CRANK CASE) Remove the COMP BOLTs.
  • Page 208 17. Precautions for exchange of refrigerant-cycle-parts (1) During exchange the following parts shall be protected by wet rag and not make the allowable temperature or more. (2) Remove the heat insulation when there is the heat insulation near the welding place. Move and cool it when its detaching is difficult.
  • Page 209 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 2004 Fujitsu General Limited. All rights reserved. Printed in Japan 2011.08.30...

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