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Fujitsu Airstage VR-II Series Service Manual

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SERVICE MANUAL

208/230V 60Hz

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  Summary of Contents for Fujitsu Airstage VR-II Series

  • Page 1: Service Manual

    SERVICE MANUAL 208/230V 60Hz...
  • Page 2: Table Of Contents

    CONTENTS 1. TEST RUN 1-1 EXECUTION PROCEDURE AND EXECUTION PRECAUTIONS......01-01 1-2 CHECK ITEMS BEFORE POWER ON............... 01-03 1-2-1 Power source inspection..................01-03 1-2-2 Outdoor unit field setting inspection..............01-04 1-2-3 Indoor unit field setting inspection................ 01-04 1-2-4 RB unit field setting inspection................01-05 1-2-5 Transmission wire installation inspection.............
  • Page 3 CONTENTS 2-9 PROTECTIVE FUNCTION..................02-16 2-9-1 Discharge temperature protection............... 02-16 02-18 2-9-2 High pressure protection..................2-9-3 Low pressure protection..................02-20 02-21 2-9-4 Heatsink temperature protection................. 2-9-5 Compressor temperature protection..............02-21 2-9-6 O.U Heat - Ex.1(2) Gas Temp. abnormal stop............ 02-21 2-9-7 Over current protection..................
  • Page 4 CONTENTS 4. TROUBLE SHOOTING 4-1 NORMAL OPERATION....................04-01 04-01 4-1-1 Indoor Unit Display....................4-1-2 Outdoor Unit Display................... 04-02 4-2 ABNORMAL OPERATION..................04-03 4-2-1 Error code Display....................04-03 4-2-2 Indoor Unit Display....................04-04 4-2-3 Outdoor Unit Display................... 04-04 4-2-4 Remote Controller Display................... 04-05 4-2-5 Trouble shooting index - Error code List -............
  • Page 5: Test Run

    1. TEST RUN...
  • Page 7: Execution Procedure And Execution Precautions

    1. TEST RUN 1-1 EXECUTION PROCEDURE AND EXECUTION PRECAUTIONS Before execution Execution zone decision Execution procedure and precautions Reason Check the characteristics of the refrigerant used and grasp the Use of a refrigerant other than the Confirmation of refrigerant used special features of the refrigerant.
  • Page 8: Transmission Wire Installation Inspection

    Execution 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 9 1-2 Check Items Before Power ON 1-2-1 Power source Inspection sheet Check Item Check contents Judgement Present Status Ref. circuit name: _________________ Power supply / 3W / (208-230V 10%) / 60Hz Master (AJUA ___G) :_____(A) For AJUA72G : 45A Circuit Breaker Size (A) Slave-1(AJUA ___G) :_____(A) For AJUA90G / 120G : 55A Slave-2(AJUA ___G) :_____(A)
  • Page 10: Outdoor Unit Field Setting Inspection

    1-2-2 Outdoor unit field setting inspection sheet Check Item Check contents Judgement Present Status No. of outdoor unit for one ref. circuit: ______, Ref. circuit name: _________________ Appearance Shall be no deformation OK / Serial No. Master: Slave -1: Slave -2: Connection points &...
  • Page 11: Rb Unit Field Setting Inspection

    1-2-4 RB unit field setting Inspection sheet RB Unit Check contents Ref. circuit name: _________________, Ref. address :__(00 Outlook No. of connected IU vs. total capacity RB unit Add. set by Rotary-SW For single type For multi type RB unit RB unit (single / series connection) Related...
  • Page 12 1-2-5 Transmission wire installation inspection sheet 1/3 Check Item Check contents Judgement Present Status Number of ref. circuit connected in the network system: ______, Ref. addresses: ______________(00 - 99) Is it LonWorks compatible? Outlook Network Transmission wire Maker name? System Wire specification 0.33mm , shield wire...
  • Page 13 1-2-5 Transmission wire installation inspection sheet 2/3 Check Item Check contents Judgement Present Status Number of ref. circuit connected in the network system: ______, Ref. addresses: ______________(00 Correct Layout Transmission line layout (Between RB unit & IU) Correct RB Gr. RB Gr.
  • Page 14 1-2-5 Transmission wire installation inspection sheet 3/3 Check Item Check contents Judgement Present Status Number of ref. circuit connected in the network system : ______, Ref. addresses :_______ _______________(00 For one VRF Network System IU number : _____ No. of IUs & OUs 400 &...
  • Page 15: Piping Installation Inspection

    1-2-6 Piping installation inspection sheet 1/2 Check Item Check contents Judgement Present Status Ref. circuit name : _________________________________, Ref. address: ______________ (00 99) Insulation & Fastening Insulated without gap & properly fastened (Yes / No) Yes / Suction line filter Is there any external filter in the suction line Outlook Oil Trap...
  • Page 16 1-2-6 Piping installation inspection sheet 2/2 Check Item Check contents Judgement Present Status Ref. circuit name: _______________________________________, Ref. address: Connect the IU to the RB unit in order of farthest branch port Correct Not correct Keep free branch port within 2 or less per refrigerant cycle Correct Branch port piping layout For multi type RB...
  • Page 17: Refrigerant Charge Amount Inspection

    1-2-7 Refrigerant charge amount inspection sheet Check Item Check contents Judgement Present Status Ref. circuit name: ____________________________, Ref. address :________(00 99) OU Model Name Additional Refrigerant Amount for OU Outdoor Unit (kg) AJUA72G / AJUA90G / AJUA120G AJ*A72G / AJ*A90G / AJ*108G : 6.31lbs / 3.0kg Liquid Pipe Length Additional Refrigerant Amount based on the liquid pipe length Additional...
  • Page 18: Check Items After Power On

    1-3 Check Items After Power ON Overview of system operation check procedure Step-1: Connect Service Tool PC to the VRF VR-II system. Do scaning of refrigerant system which should be commissioned. Step-2: Compare the number of installed units (OU, RB Group and IU) with the System List data obtained from the Service Tool. Step-3: Operate all Indoor Units under Test Mode Cooling (Select Test mode either cool or heat based on ambient temperature.).
  • Page 19: Installed Unit And Their Addresses Check

    1-3-2 Error indication check sheet 2/2 Check Contents Judgement Present Status Ref. circuit name ________________________, Ref. address ________(00 RB unit & respective IU address (Design Value) Check RB unit PCB-LED status RB address _______ (IU address _____________) LED1 (Green ) RB address _______ (IU address _____________) Judgment : must be ON...
  • Page 20: Transmission Line Connection Check

    1-3-4 Transmission line connection check sheet Note: The following check method by using test-run is necessary for checking of incorrect transmission wire connection. Check Contents Check items Checking method Judgement Present Status Ref. circuit : Name _________________, Ref. address ________(select from 00 to 99) Check status Design value IU add _____ (RB add ____)
  • Page 21: Operation Check Sheet

    1-3-5 Operation check sheet Check Contents Judgement Present Status Refrigerant Circuit : Name _________________, Address ________(00 Degree of sub-cool at OU sub - cooler side should be, F( C) 36 F(5 C 20 C) AND Yes / Pulse value EEV3 should be, EEV3 400P EEV3...
  • Page 22: Test Run Operation

    1-4 Test Run Operation 1-4-1 Test Run From Outdoor unit PC Board All the indoor units connected to the outdoor unit can be test-operated by push button setting. (Only for master unit) SWITCH POSITION POWER ERROR MODE 7 Segment LED101 LED102 LED Lamp (GREEN)
  • Page 23: Test Run From Remote Controller

    1-4-2 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 24: Central Remote Controller

    UTY - DTG 4. Touch panel controller (1) Select the objective you want to test run. Select the objective icon or list at the monitor screen. (Multiple selections is possible) Select all the devices registered as objectives by pressing "Select All" on the monitor screen. (2) After objective selection at (1), switch to the <Setting screen>...
  • Page 25 UTY - RNR 6. 2-wire type wired remote controller (1) Press "Menu" on the monitor screen. the < Main Menu screen > is displayed. (2) Press "Next Page" and press "Maintenance" (3) Press "Next Page" and press "Test Run". the <Test run screen > is displayed. (4) Press "OK"...
  • Page 26: Test Run Control

    1-5 TEST RUN CONTROL 1. When the test run signal is transmitted from standard wired, wireless remote controller, simple remote controller, transmitted netwwork, 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 27 1-6 Field Setting And Monitor Mode List for Outdoor unit ITEM Classification Setting Mode Information contents CODE No. The number of the communicating unit is displayed Push switch on Device and Connected number of indoor unit system outdoor unit PCB Software version of outdoor unit Software version : Monitoring mode...
  • Page 28 ITEM ITEM Classification Setting Mode Setting Function Default CODE No. CODE No. 131-213ft.(40-65m) Pipe length setting Push switch on Install 0-131ft.(0-40m) outdoor unit PCB 213-295ft.(65-90m) 295-394ft.(90-120m) 394-492ft.(120-150m) Normal Setting mode Correction Sequential start shift 21sec. Delay [ F2 ] 42sec. Delay 63sec.
  • Page 29 ITEM ITEM Classification Setting Mode Setting Function Default CODE No. CODE No. Off (quiet priority) Low noise Capacity priority setting Push switch on setting 1 (in low noise mode) On (capacity priority) outdoor unit PCB Off (Normal) Low noise mode setting On (Low noise mode operation is always done) Low noise mode operation Level 1 (55dB)
  • Page 30 ITEM Classification Setting Mode Setting Function CODE No. Cooling test run Forced thermostat-ON in Cooling Push switch on Forced operation outdoor unit PCB Heating test run Forced thermostat-ON in Heating Function mode Test run stop Test run is stopped [ F3 ] Forbidden 03,04 Automatic address setting operates for signal amplifier...
  • Page 31 1-7 Field Setting / Function Setting for Indoor unit ITEM ITEM Classification Setting Mode Setting Function Default CODE No. CODE No. Address Indoor unit address 00~63 00~63 Indoor unitfield setting Refrigerant circuit address 00~99 00~99 setting by Default Filter Filter indicator Interval remote controller Longer Shorter...
  • Page 32 ITEM ITEM Classification Setting Mode Setting Function Default CODE No. CODE No. Default 0 °F(0°C) Correction Cool air temperature trigger Indoor unit field setting Temperature overshoot setting +4°F( °C) setting by Temperature undershoot setting -4°F( °C) remote controller Heat air temperature trigger Default 0 °F(0°C) Temperature undershoot setting...
  • Page 33: Field Setting / Function Setting For Outdoor Air Unit

    1-8 Field Setting / Function Setting for Outdoor air unit ITEM ITEM Classification Setting Mode Setting Function Default CODE No. CODE No. Address Indoor unit address 00~63 00~63 Indoor unit field setting Refrigerant circuit address 00~99 00~99 setting by Default Filter Filter indicator Interval remote controller...
  • Page 34: Outdoor Unit Operation Control

    2. OUTDOOR UNIT OPERATION CONTROL...
  • Page 35: Refrigerant Circuit

    2. OUTDOOR UNIT 2-1 REFRIGERANT CIRCUIT Outdoor unit GAS LINE (High pressure) 4WV 1 HEX1 EEV1 HPSW1 EEV3 TH10 HEX2 4WV 2 LIQUID LINE EEV2 SCHEX CMP1 (INV) TH11 FAN1 GAS LINE (Low pressure) : Capillary : Strainer : Fusible plug Indoor unit1 Operation temp.
  • Page 36: Refrigerant Circuit For Outdoor Air Unit

    2-1-1 REFRIGERANT CIRCUIT for Outdoor air unit Outdoor air unit (AAUA48/ 96TLAV) TH25 FAN21 TH24 EEV21 TH22 HEX21 TH21 Outdoor air unit (AAUA72TLAV) TH25 FAN21 FAN22 TH24 EEV21 TH22 HEX21 TH21 : Capillary : Strainer No. Part name Function Heat exchanger outlet thermistor Detects the temperature of refrigerant Suction airflow temp.
  • Page 37: Input / Output List

    2-2 INPUT / OUTPUT LIST Input / output or kind of detail Control range Pressure sensor Measure range 0 to 5.0MPa (0 to 725psi) High pressure sensor Pressure sensor Measure range 0 to 1.7MPa (0 to 247psi) Low pressure sensor Thermistor Measure range 10 to 130 (50 to 266 F)
  • Page 38: Operation Mode Selection And Controlling

    2-3 Heat Recovery Operation controlling 2-3-1 Operation mode selection and controlling Under Heat Recovery operation, the heat balance for the system is controlled based on the Target High pressure and the Target low pressure. By changing compressor rotation speed or changing Heat exchange capacity, the system can maintain the good heat balance. The target High pressure value and the target low pressure value in the target range are decided by the outdoor unit's operation mode (Cond- ensor or Evaporator).
  • Page 39: Compressor Speed Control

    2-4-2 Compressor speed control (1) Speed range and controlling - On operation range: 20 - 115 rps * - Changing interval: 60 sec. - When the multi connection outdoor unit has the same type of compressor, all of compressors rotational speed are controlled with the same speed at the normal operating condition.
  • Page 40 2-4-3 Capacity Control (1) Capacity of compressor operation The inverter compressor is able to control the amount of required refrigerant circulation in details. [rps] 0.1 rps on controlling steps1 On operating range: 20 to 115 rps* Operating Range *The maximum speed: 115 rps (20 to 115 rps*) Cooling (Cooling main) 100rps Heating (Heating main) 115rps...
  • Page 41 2-4-4 Compressor Sequence Operation Make starting sequence and start and stop of the compressors in accordance with the below sequence. Starting sequence condition Example) Starting sequence : Compressor started first, compressor stopped last Starting sequence : Compressor started 2nd, compressor stopped 2nd from the end Starting sequence : Compressor started 3nd, compressor stopped 3nd from the end Rotate the stating sequence under the following conditions:...
  • Page 42: Capacity Control

    2-5 HEAT EXCHANGER CAPACITY CONTROL 2-5-1 Operation mode selection and controlling Under The heat exchanger capacity is controlled using the 4WV, fan, and EEV according to the target high and low pressures. The method for changing the capacity of the heat exchanger differs depending on the operation mode. System demand Heat-Ex conditions Controling device...
  • Page 43: Fan Control

    2-6 FAN CONTROL 2-6-1 Cooling / Cooling Main Operation The outdoor fan speed at start up is 300 rpm Fan speed (rpm) Fan step L-Chassis S-Chassis intermittent 6 intermittent 6 intermittent 5 intermittent 5 intermittent 4 intermittent 4 intermittent 3 intermittent 3 intermittent 2 intermittent 2...
  • Page 44: Heating / Heating Main Operation

    Intermittent fan mode When switched from normal fan step to intermittent fan step, always start from 300rpm/7sec. When there was a change during intermittent step 1-6, switching is performed at the time the current speed duration time reaches time-up. Fan speed 0 rpm Fan speed 300 rpm Fan step Fan mode...
  • Page 45: Expansion Valve Control

    2-7 EXPANSION VALVE CONTROL The EEV controls the flow of refrigerant Control range Contrl and detection Operation mode operation range stop - Liquid Pressue control (TH4) Cooling - HEX balance (TH9,TH10) 0 pulses 52- 480 pulses EEV 1 Cooling Main "TH9 TH10"...
  • Page 46: Special Operation

    2-8 SPECIAL OPERATION 2-8-1 Oil Recovery operation (1) 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 47: Defrost Operation Control

    2-8-3 Defrost Operation Control < Defrosting start condition > Accumulated heating operation time is 40 minutes or longer (Accumulated heating operation time is reset at the end of cooling operation or defrosting operation.) One of Heat-Ex satisfies condition below Condition : Accumulated operating time is 150 minutes* or longer: "Heat exchange liquid temperature (TH9 and TH10) 28.4°F ( -2°C)"...
  • Page 48 < Operating state of each part during defrosting operation > Finishing process Actuator Preparation process On Defrost operatiom All compressor operaiotn Stop All compressor start Compressor All compressor operaiotn Stop Change Condensor (OFF) Cndensor (OFF) Heat Ex(4WV) Keeps the operation mode Stops Stops Stops...
  • Page 49: Low Noise Mode

    2-8-4 Low noise mode When the low noise mode setting ON from Push SW or External input or System controller Input, the outdoor unit operates in the low noise mode as follows. « » Setting and corresponding operations Low noise mode setting External Input (CN131) Low noise level setting Capacity priority setting...
  • Page 50: Snow Falling Protection Fan Mode -Default Setting

    2-8-5 Snow Falling Protection Fan mode - Default Setting - The fan rotates compulsorily at the maximum speed when the outdoor temperature becomes 41 F(5 C) or less The fan is rotated for 1 minute at the fan step upper limit at the interval set by PUSH SW. This mode ends when the outdoor temperature becomes 44.6 F (7 C) or more or operation starts.
  • Page 51: Protective Function

    2-9 PROTECTIVE FUNCTION 2-9-1 Discharge temperature protection Protective function Detect device Cool Heat Display Starting conditions Release conditions Operation °F Discharge Discharge temp. Cooling/Cooling Main: Below 194 temperature sensor <TH1> Discharge temperature °C) protection 1 °F( °C) above 203 EEV3 + 30pls/30 sec. °F Heating/Heating Main: Below 207...
  • Page 52 Discharge temperature protection -Summary- Protection controlling range in Cooling mode DTP COMP STOP: Error Indication DTP2: Outdoor unit rotation excution DTP3: limited Compressor speed controlling DTP1: EEV3 Liquid injection controlling Note: Target pressure controlling will be cancelled when the temperature is in the range color orange. Protection controlling range in Heating mode DTP COMP STOP: Error Indication DTP3: limited Compressor speed...
  • Page 53: High Pressure Protection

    2-9-2 High pressure protection Display Start condition Release condition Operation Protective function Detect device Cool Heat High pressure High Above 573psi (3.94MPa) 60 sec. elapsed and SV2 =>ON protection 1 pressure Below 538psi (3.70MPa) sensor High pressure High Pattern 1 60 sec.
  • Page 54 High pressure protection -Summary- Protection controlling range in cooling operaing mode HPP Stop2 : Error Indication E A 42 HPP Stop1: Error Indication E A 41 HP Protection 1: SV2 ON Abnromal HP protection ( Pattern 2) : Compressor rotation speed lessen 18.5 rps (-15.0 rps) / 30sec.
  • Page 55: Low Pressure Protection

    2-9-3 Low pressure protection Detect device Display Start condition Release condition Operation Protective function Cool Heat Low pressure Low pressure Below 15psi (0.10MPa) 3minutes elapsed and SV1 =>ON protection 1 sensor Above 25psi (0.17MPa) Low pressure Low pressure After compressor started 3minutes elapsed and Operating Indoor unit EEV protection 2...
  • Page 56: Heatsink Temperature Protection

    2-9-4 Heatsink temperature protection Operation Protective function Detect device Display Start condition Release condition Cool Heat °F (75°C) °F ( °C) Below 167 Above 167 Heat sink Heatsink temp Cancel Fan speed temperature sensor step down. protection 1 °F °C °F (83°C) Above 181 Heat sink...
  • Page 57: Over Current Protection

    2-9-7 Over current protection Protective function Detect device Cool Heat Display Start condition Release condition Operation E941 Over current protection Compressor stop and circuit detects (Abnormal Error indication (permanent current) in 5 times during "Trip Detection" stop) compressor operatng. Error reset (push Overcurrecnt Inverter PCB button SW)
  • Page 58: Fan Motor, Motor Driver Abnormal Stop Protection

    2-9-10 Fan Motor, Motor Driver abnormal stop protection Detect Operation Protective function Cool Heat Display Start condition Release condition device Embeded E97. 1 1. When the outdoor fan rotation speed is Fan Motor lock device less than 100rpm in 20seconds after protection stop fan motor starts.
  • Page 59 3. INDOOR UNIT OPERATION...
  • Page 61: Fan Control

    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. COOL OPERATION 5°F(3°C) The fan speed is determined automatically in accordance Hi zone 4°F(2°C) with the condition "(TR(corrected room temperature) - TS...
  • Page 62: Master Control

    3-2 MASTER CONTROL 3-2-1 Operation Mode Control (1) Mode setting Each possible operation mode in each connectable type is controlled as below. Custom - Cool Dry Heat Auto Connectable type Auto Free Cool / Heat Fix Cool / Heat Only Cool : Mode available : Mode unavailable Mode available when the priority given to administrative indoor unit.
  • Page 63 (4) Priority mode ( for connectable type The purpose of the priority mode is to restrict operation commands (heating, cooling, dry) from the connected indoor units. There are 3 priority modes of Neutral, Cooling Priority, and Heating Priority. The operation modes restricted by each of these modes are as follows: Priority mode Restricted operation mode Neutral...
  • Page 64 3-2-1 Operation Mode Control for Outdoor air unit (1) Mode setting Each possible operation mode in each connectable type is controlled as below. Cool Dry Heat Fan Connectable type Free Cool / Heat Fix Cool / Heat Only Cool : Mode available : Mode unavailable RB : I.U = 1 : 1 RB : I.U = 1 : 2...
  • Page 65 (4) Priority mode ( for connectable type The purpose of the priority mode is to restrict operation commands (heating, cooling) from the connected outdoor air units. There are 3 priority modes of Neutral, Cooling Priority, and Heating Priority. The operation modes restricted by each of these modes are as follows: Priority mode Restricted operation mode Neutral...
  • Page 66: Auto Changeover Heating / Cooling Operation

    3-2-2 Auto Changeover Heating / Cooling Operation [Function available Indoor unit(s)] Connectable type : All Indoor units Connectable type : Administrative indoor unit (Management Indoor unit) Refer to the setting Method Setting Method 1. Switch operation mode management to "Management by indoor unit" by RB unit DIP-SW. 2.
  • Page 67 3-2-2 Auto Changeover Heating / Cooling Operation for Outdoor air unit [Function available Outdoor air unit(s)] Connectable type : All Outdoor air units Connectable type : Administrative outdoor air unit (Management Outdoor air unit). Refer to the setting Method Setting Method 1.
  • Page 68: Auto Changeover Cooling / Dry Operation

    3-2-3 Auto Changeover Cooling / Dry Operation [Function available Indoor unit(s)] Connectable type : Cooling Only indoor unit Judge cooling/dry by the difference between the setting temperature and the room temperature. In case of group connection of cooling only indoor unit, the room temperature sensor in wired remote controller manages the operating mode.
  • Page 69: Custom Auto Heating / Cooling Operation

    3-2-4 Custom Auto Heating / Cooling Operation [Function available in follwing conmditions] - Remote controller type: UTY-RNRU - Remote sensor in use - Prohibit the central function from the Central controller *Reccomend CUSTOM AUTO Operation Operation flow chart START T set.C - T set.H 6°F T set.C: Setting temp.
  • Page 70: Cool" Position

    3-2-4 "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 +1°F(+0.5°C) Temperature Ts -1°F(-0.5°C)
  • Page 71 3-2-5 "COOL" Position for Outdoor air unit When using the cooling mode, set the temperature to a value lower than the discharge airflow temperature, otherwise the outdoor air unit will not start the cooling operation and only the fan will rotate. An example for COOLING TEMPERATURE CONTROL time chart (Manual setting) Outdoor temp.
  • Page 72: 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 73 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 74 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 1 to 4...
  • Page 75: Electronic Expansion Valve 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 by Thermo-OFF condition. EEV Condition Outdoor unit Condition Fully closed Cooling Fully closed Heating...
  • Page 76 3-4 ELECTRONIC EXPANSION VALVE CONTROL for Outdoor air unit 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 by Thermo-OFF condition. EEV Condition Outdoor unit Condition Fully closed Cooling...
  • Page 77: Function

    3-6 FUNCTION 3-6-1 Auto Restart The air conditioner restarts with the previous setting operation. 3-6-2 Freeze Prevention 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 78: Outdoor Temperature Protected Operation For Outdoor Air Unit

    3-6-4 Outdoor temperature protected operation for Outdoor air unit 1. COOL OPERATION The contents of operation is controlled as following based on the suction airflow temperature. a) Operation mode management is made "Management by indoor unit", and outdoor air unit is master indoor unit. b) Cases Other than (a) Suction airflow Suction airflow...
  • Page 79: Position Of Solenoid Coil

    RB UNIT OPERATION 3-7 RB UNIT COMPORNENT 3-7-1 Position of Solenoid coil Single type UTP-RX01AH UTP-RX01BH UTP-RX01CH Multi type UTP-RX04BH Color of Connector Green Blue Black White Yellow 3-7-2 Position of Solenoid valve ( ) : Indication on the Service Tool Liquid Line (SVD1) High Pressure Gas Line...
  • Page 80: Pcbs Layout

    3-7-3 PCBs layout Single type Multi type - Upper side - -Upper side- Main PCB SV connector SV connector DIP SW Error indication LED SET 1 (Red) Power supply indication LED (Green) DIP SW SET 1 DIP SW Transmission PCB1 SET 2 Transmission PCB2 3-7-4 PCB component...
  • Page 81: Solenoid Valve Controlling

    3-7-4 Solenoid Valve controlling Open / Close operation in Operation SV No. Function Cooling / Dry mode Heating mode Fan mode / Stop Close Close ( SVD1 ) Discharge Valve Open Suction Valve Close SV4 - 6 ( SVS ) Open Close Equalization Valve (Pressurization)
  • Page 83: Trouble Shooting

    4. TROUBLE SHOOTING...
  • Page 85: Normal Operation

    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 86: Outdoor Unit Display

    4-1-2 OUTDOOR UNIT DISPLAY Indication type 7 Segment LED Pattern Description Idling(stop) Blank Cooling Mode (Mainly Cooling) "C" OO "L" Heating Mode (Mainly Heating) "H" EA "T" Refer to Chapter 02. Oil Recovery Operation (Outdoor unit operation control) "O" IL "R" ECOVERY Refer to Chapter 02.
  • Page 87: Abnormal Operation

    4-2 ABNORMAL OPERATION 4-2-1 Error code Display An Error code is represented by 3 digit characters. The first 2 digit means the subsection Error code, and the last 1 digit means the specifics Error code. Ex.) Indoor unit Network communication Error 1 4 .
  • Page 88: Indoor Unit Display

    4-2-2 Indoor Unit Display Error Indication Flashing Pattern Example : Indoor Unit Main PCB Error (Operation LED : 3 times, Timer LED : 2 times) 1 cycle 1.0s 0.5s 0.5s 0.5s 0.5s 0.5s 0.5s 1.0s Operation LED 3.0s Timer LED 1.0s 4.0s 0.5s 0.5s 0.5s 0.5s...
  • Page 89: 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.) If “ “ is displayed, immediately contact authorized service personnel.
  • Page 90: Trouble Shooting Index - Error Code List

    4-2-5 Trouble shooting index - Error code List 1/2 - Display Target A Display Target B Display Target C Display Target D Simple Wired remote controller Group Remote controller 7 seg. Display on Outdoor unit Controller PCB Service Tool 2 / 3 wires Wired remote controller Central Remote controller Indoor unit LED brinking times, Touch- Panel controller...
  • Page 91: Trouble Shooting Index - No Error Code

    4-2-5 Trouble shooting index - Error code List 2/2 - Display Target B Display Target A Display Target C Display Target D Simple Wired remote controller Group Remote controller 7 seg. Display on Outdoor unit Controller PCB Service Tool 2 / 3 wires Wired remote controller Central Remote controller Indoor unit LED brinking times, Touch- Panel controller...
  • Page 92: 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 (*1) Not indicated on Indoor Unit and and Peripheral unit. Peripheral unit. Indicated on Service Tool. Indicated on Service Tool.
  • Page 93: Error History Mode

    4-2-8 ERROR HISTORY MODE When the abnormality occurred, the Outdoor unit memorizes the history of error codes up to 10 and it can be displayed on 7 segments LED. It is an effective means to examine abnormality that occurred in the past. *The error history can be cleared by setting to F3-30.
  • Page 94: Trouble Shooting With Error Code

    4-2-9 TROUBLE SHOOTING WITH ERROR CODE Indicate or Display: Trouble shooting 1 E12.1 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. < 1 2 > Communication Error Error Code : 1 2...
  • Page 95 Indicate or Display: Trouble shooting 2 E12.2 Outdoor Unit : E.5 U.1, INDOOR UNIT Error Method: Indoor Unit : Operation LED 1 times Flash, Timer LED 2 Times Flash, Filter LED Continuous Flash. Wired Remote Controller signal Error Remote Controller : 1 2 Detective Actuators: Detective details: Indoor unit Controller PCB circuit...
  • Page 96 Indicate or Display: Trouble shooting 3 E12.3 Outdoor Unit : E.5 U.1 INDOOR UNIT Error Method: Indoor Unit : Operation LED 1 times Flash, Timer LED 2 Times Flash, Number excess of device in Wired Filter LED Continuous Flash. remote contorller system (2 Wires RC) Error Code : 1 2 Detective Actuators:...
  • Page 97 Indicate or Display: Trouble shooting 4 1 3. 1 OUTDOOR UNIT Error Method: Outdoor Unit : E. 1 3. 1 Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Communication Error Between Filter LED Continuous Flash. Outdoor unit Error Code : 9 U / 1 3...
  • Page 98 Indicate or Display: Trouble shooting 5 E14.1 OUTDOOR UNIT Error Method: Outdoor Unit : E. 1 4. 1 Indoor Unit : No display / Outdoor Unit Network Operation LED 1 times Flash, Timer LED 4 Times Flash, Communication 1 Error Filter LED Continuous Flash.
  • Page 99 Indicate or Display: Trouble shooting 6 E14. 2 Outdoor Unit : E. 1 4. 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 Operation LED 1 times Flash, Timer LED 4 Times Flash, Filter LED Continuous Flash.
  • Page 100 Indicate or Display: Trouble shooting 7 E14. 3 Outdoor Unit : E.1 4. 1 / 1 4. 2 * INDOOR UNIT Error Method: Indoor Unit : Operation LED 1 times Flash, Timer LED 4 Times Flash, Indoor unit Network communication Filter LED Continuous Flash.
  • Page 101 Indicate or Display: Trouble shooting 8 E14. 5 Outdoor Unit : E.1 4. 5 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, The number of Indoor unit shortage Filter LED Continuous Flash. / Error No display (When DIP-SW4-1 is OFF.) Error Code...
  • Page 102 Indicate or Display: Trouble shooting 9 E16. 1 Outdoor Unit : E.1 4.1, 1 4.2 * INDOOR UNIT Error Method: Indoor Unit : Operation LED 1 times Flash, Timer LED 6 Times Flash, Filter LED Continuous Flash. Transmission PCB Connection Error Error Code : 1 6 * * Outdoor unit indicates 1 4.1 or 14.2 (No communication from Indoor unit)
  • Page 103 Indicate or Display: Trouble shooting 10 E16. 4 Outdoor Unit : No Display INDOOR UNIT Error Method: Indoor Unit : No Display Communication Error Between Controller and Indoor unit Error Code : 1 6 (Peripheral Unit ) Detective Actuators: Detective details: Indoor unit Controller PCB circuit When the cut-off of network communication is detected (more than 90 seconds Indoor unit Communication PCB...
  • Page 104 Indicate or Display: Trouble shooting 11 E26. 4 Outdoor Unit : E.5 U.1 INDOOR UNIT Error Method: Indoor Unit : Operation LED 2 times Flash, Timer LED 6 Times Flash, Address Duplication in Wired remote Filter LED Continuous Flash. contorller system Error Code : 2 6 Detective details:...
  • Page 105 Indicate or Display: Trouble shooting 12 E26. 5 Outdoor Unit : E.5 U.1 INDOOR UNIT Error Method: Indoor Unit : Operation LED 2 times Flash, Timer LED 6 Times Flash, Address setting Error in Wired remote Filter LED Continuous Flash. contorller system Error Code : 2 6...
  • Page 106 Indicate or Display: Trouble shooting 13 E28. 1 Outdoor Unit : E. 28. 1 OUTDOOR UNIT Error Method: Indoor Unit : No Display Auto Address Setting Error Error Code : No Display * Service tool does not indicate the Error code <<...
  • Page 107 Indicate or Display: Trouble shooting 14 E28. 4 Outdoor Unit : E. 2 8. 4 OUTDOOR UNIT Error Method: Indoor Unit : No Display Signal Amplifier Auto Address Error Error Code : No Display *Service tool does not indicate the Error Detective details: Detective Actuators: Outdoor unit Main PCB...
  • Page 108 Indicate or Display: Trouble shooting 15 E29. 1 Outdoor Unit : E.5 U.1 INDOOR UNIT Error Method: Indoor Unit : Operation LED 2 times Flash, Timer LED 9 Times Flash, Connection unit number error (Indoor Filter LED Continuous Flash. unit in Wired remote controller system) Error Code : 2 9 Detective details:...
  • Page 109 Indicate or Display: Trouble shooting 16 E29. 2 Outdoor Unit : No Display INDOOR UNIT Error Method: Indoor Unit : No Display Connection unit number error (Remote controller) Error Code : 2 9 Detective details: Detective Actuators: When the number of connecting remote controller are out of specified rule. Wired remote controller ( 2-Wire ) Forecast of Cause : 1.
  • Page 110 Indicate or Display: Trouble shooting 17 E31. 3 Outdoor Unit : E.5 U.1 INDOOR UNIT Error Method: Indoor Unit : Operation LED 3 times Flash, Timer LED 1 Times Flash, Indoor unit Power Frequency Filter LED Continuous Flash. Error Code : 3 1 Abnormal Detective Actuators:...
  • Page 111 Indicate or Display: Trouble shooting 18 E32. 1 Outdoor Unit : E.5 U.1 INDOOR UNIT Error Method: Indoor Unit : Operation LED 3 times Flash, Timer LED 2 Times Flash, Indoor unit PCB Model Information Filter LED Continuous Flash. Error Error Code : 3 2 Detective details:...
  • Page 112 Indicate or Display: Trouble shooting 19 E32. 3 Outdoor Unit : E.5 U.1 INDOOR UNIT Error Method: Indoor Unit : Operation LED 3 times Flash, Timer LED 2 Times Flash, Indoor unit EEPROM Access Error Filter LED Continuous Flash. Error Code : 3 2 Detective details: Detective Actuators:...
  • Page 113 Indicate or Display: Trouble shooting 20 E3A. 1 Outdoor Unit : E.5 U.1 INDOOR UNIT Error Method: Indoor Unit : Operation LED 3 times Flash, Timer LED 10 Times Flash, Indoor unit communication circuit (WRC) Filter LED Continuous Flash. microcomputers communication Error Error Code : 3 A Detective details:...
  • Page 114 Indicate or Display: Trouble shooting 21 E41. 1 Outdoor Unit : E.5 U.1 INDOOR UNIT Error Method: Indoor Unit : Operation LED 4 times Flash, Timer LED 1 Times Flash, Filter LED Continuous Flash. Inlet air temp. Sensor Error Error Code : 4 1 Detective details: Detective Actuators:...
  • Page 115 Indicate or Display: Trouble shooting 22 E42. 1 Outdoor Unit : E.5 U.1 INDOOR UNIT Error Method: Indoor Unit : Operation LED 4 times Flash, Timer LED 2 Times Flash, Indoor unit Heat Ex. inlet temp. Filter LED Continuous Flash. sensor Error Error Code : 4 2...
  • Page 116 Indicate or Display: Trouble shooting 23 E42. 3 Outdoor Unit : E.5 U.1 INDOOR UNIT Error Method: Indoor Unit : Operation LED 4 times Flash, Timer LED 2 Times Flash, Indoor unit Heat Ex. outlet temp. Filter LED Continuous Flash. Sensor Error Error Code : 4 2...
  • Page 117 Indicate or Display: Trouble shooting 24 E51. 2 Outdoor Unit : E.5 U.1 INDOOR UNIT Error Method: Indoor Unit : Operation LED 5 times Flash, Timer LED 1 Times Flash, Indoor Unit Fan Motor 1 rotation Filter LED Continuous Flash. speed Error Error Code : 5 1...
  • Page 118 Indicate or Display: Trouble shooting 25 E52. 1 Outdoor Unit : E.5U.1 INDOOR UNIT Error Method: Indoor Unit : Operation LED 5 times Flash, Timer LED 2 Times Flash, Coil 1 (Expansion valve ) Error Filter LED Continuous Flash. Error Code : 5 2 Detective details: Detective Actuators:...
  • Page 119 Indicate or Display: Trouble shooting 26 E53. 1 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. Indoor unit Drain pump Error Error Code : 5 3 Detective details: Detective Actuators:...
  • Page 120 Indicate or Display: Trouble shooting 27 E61. 5 Outdoor Unit : E. 6 1. 5 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Outdoor Unit Reverse Phase, Filter LED Continuous Flash. Missing Phase Wire Error Error Code : 9 U / 6 1...
  • Page 121 Indicate or Display: Trouble shooting 28 E62. 3 Outdoor Unit : E. 6 2. 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 : 9 U / 6 2 Detective Actuators:...
  • Page 122 Indicate or Display: Trouble shooting 29 E62. 6 Outdoor Unit : E. 6 2. 6 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Inverters Communication Error Filter LED Continuous Flash. Error Code : 9 U / 6 2 Detective Actuators: Detective details:...
  • Page 123 Indicate or Display: Trouble shooting 30 E62. 8 Outdoor Unit : E. 6 2. 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 : 9 U / 6 2 Detective Actuators:...
  • Page 124 Indicate or Display: Trouble shooting 31 E63. 1 Outdoor Unit : E. 6 3. 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 : 9 U / 6 3 Detective Actuators: Detective details:...
  • Page 125 Indicate or Display: Trouble shooting 32 E67. 2 OUTDOOR UNIT Error Method: Outdoor Unit : E. 6 7. 2 Inverter PCB short interruption Indoor Unit : No Display Error Error Code : No display Detective Actuators: Detective details: Inverter PCB ''Short interruption"...
  • Page 126 Indicate or Display: Trouble shooting 33 E68. 2 Outdoor Unit : E. 6 8. 2 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Rush Current Limiting Resistor Filter LED Continuous Flash. Temp Rise Protection Error Code : 9 U / 6 8...
  • Page 127 Indicate or Display: Trouble shooting 34 E69. 1 Outdoor Unit : E. 6 9. 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. / Operation LED 1 time Flash, Parallel Communication Error Timer LED 4 Times Flash, Filter LED Continuous Flash.
  • Page 128 Indicate or Display: Trouble shooting 35 E71. 1 Outdoor Unit : E. 7 1. 1 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Discharge Temp. Sensor 1 Error Filter LED Continuous Flash. Error Code : 9 U / 7 1 Detective Actuators:...
  • Page 129 Indicate or Display: Trouble shooting 36 E72. 1 Outdoor Unit : E. 7 2. 1 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Compressor Temp Sensor 1 Error Filter LED Continuous Flash. Error Code : 9 U / 7 2 Detective Actuators:...
  • Page 130 Indicate or Display: Trouble shooting 37 E73.4 Outdoor Unit : E. 7 3. 4 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Heat Ex.1 Gas Temp Sensor Error Filter LED Continuous Flash. Error Code : 9 U / 7 3 Detective details:...
  • Page 131 Indicate or Display: Trouble shooting 38 E 73. 5 Outdoor Unit : E. 7 3. 5 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Heat Ex.1 Liquid Temp Filter LED Continuous Flash. Sensor Error Error Code : 9 U / 7 3...
  • Page 132 Indicate or Display: Trouble shooting 39 E73. 6 Outdoor Unit : E. 7 3. 6 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Heat Ex.2 Gas Temp Sensor Error Filter LED Continuous Flash. Error Code : 9 U / 7 3 Detective details:...
  • Page 133 Indicate or Display: Trouble shooting 40 E73. 7 Outdoor Unit : E. 7 3. 7 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Heat Ex.2 Liquid Temp Filter LED Continuous Flash. Sensor Error Error Code : 9 U / 7 3...
  • Page 134 Indicate or Display: Trouble shooting 41 E74. 1 Outdoor Unit : E. 7 4. 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 : 9 U / 7 4 Detective Actuators:...
  • Page 135 Indicate or Display: Trouble shooting 42 E75. 1 Outdoor Unit : E. 7 5. 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 : 9 U / 7 5 Detective Actuators:...
  • Page 136 Indicate or Display: Trouble shooting 43 E77. 1 Outdoor Unit : E. 7 7. 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 : 9 U / 7 7 Detective Actuators:...
  • Page 137 Indicate or Display: Trouble shooting 44 E82. 2 Outdoor Unit : E. 8 2. 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 : 9 U / 8 2...
  • Page 138 Indicate or Display: Trouble shooting 45 E83. 1 Outdoor Unit : E. 8 3. 1 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Liquid Pipe Temp. Sensor 1 Error Filter LED Continuous Flash. Error Code : 9 U / 8 3 Detective details:...
  • Page 139 Indicate or Display: Trouble shooting 46 E83. 2 Outdoor Unit : E. 8 3. 2 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Liquid Pipe Temp. Sensor 2 Error Filter LED Continuous Flash. Error Code : 9 U / 8 3 Detective details:...
  • Page 140 Indicate or Display: Trouble shooting 47 E84. 1 Outdoor Unit : E. 8 4. 1 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Current Sensor 1 abnormal Filter LED Continuous Flash. Error Code : 9 U / 8 4 Detective Actuators:...
  • Page 141 Indicate or Display: Trouble shooting 48 E86. 1 Outdoor Unit : E. 8 6. 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 : 9 U / 8 6 Detective details:...
  • Page 142 Indicate or Display: Trouble shooting 49 E86. 3 Outdoor Unit : E. 8 6. 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 : 9 U / 8 6 Detective details:...
  • Page 143 Indicate or Display: Trouble shooting 50 E86. 4 Outdoor Unit : E. 8 6. 4 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, High Pressure Switch 1 Error Filter LED Continuous Flash. Error Code : 9 U / 8 6 Detective Actuators:...
  • Page 144 Indicate or Display: Trouble shooting 51 E93. 1 Outdoor Unit : E. 9 3. 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 : 9 U / 9 3 Detective details:...
  • Page 145 Indicate or Display: Trouble shooting 52 E94. 1 Outdoor Unit : E. 9 4. 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 : 9 U / 9 4 Detective details: Detective Actuators:...
  • Page 146 Indicate or Display: Trouble shooting 53 E95. 5 Outdoor Unit : E. 9 5. 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 : 9 U / 9 5...
  • Page 147 Indicate or Display: Trouble shooting 54 E97. 1 Outdoor Unit : E. 9 7. 1 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. Error Code : 9 U / 9 7 Detective details:...
  • Page 148 Indicate or Display: Trouble shooting 55 E97. 5 Outdoor Unit : E. 9 7. 5 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Outdoor Unit Fan Motor Temp. Filter LED Continuous Flash. Abnormal Error Code : 9 U / 9 7...
  • Page 149 Indicate or Display: Trouble shooting 56 E97. 9 Outdoor Unit : E. 9 7. 9 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Outdoor Unit Fan Motor Driver Filter LED Continuous Flash. Abnormal Error Code : 9 U / 9 7...
  • Page 150 Indicate or Display: Trouble shooting 57 E9A.1 Outdoor Unit : E. 9 A. 1 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Coil 1 (EEV) Error Filter LED Continuous Flash. Error Code : 9 U / 9 A Detective details: Detective Actuators:...
  • Page 151 Indicate or Display: Trouble shooting 58 E9A.2 Outdoor Unit : E. 9 A. 2 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Coil 2 (EEV) Error Filter LED Continuous Flash. Error Code : 9 U / 9A Detective details: Detective Actuators:...
  • Page 152 Indicate or Display: Trouble shooting 59 E9A.3 Outdoor Unit : E. 9 A. 3 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Coil 3 (EEV) Error Filter LED Continuous Flash. Error Code : 9 U / 9 A Detective details: Detective Actuators:...
  • Page 153 Indicate or Display: Trouble shooting 60 E9U.2 OUTDOOR UNIT Error Method: Outdoor Unit : E. 9 U. 2 (Only for master outdoor unit) Indoor Unit : No display / Operation LED 9 times Flash, Timer LED 15 Slave Outdoor Unit Error timse Flash Filter LED Continuous Flash Error Code * Master Outdoor unit : 9 U.
  • Page 154 Indicate or Display: Trouble shooting 61 EA1. 1 Outdoor Unit : E. A 1. 1 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Discharge Tempreture 1 Abnormal Filter LED Continuous Flash. Error Code : 9 U / A 1 Detective details:...
  • Page 155 Indicate or Display: Trouble shooting 62 EA3. 1 Outdoor Unit : E. A 3. 1 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Compressor 1 Temperature Abnormal Filter LED Continuous Flash. Error Code : 9 U / A 3 Detective details:...
  • Page 156 Indicate or Display: Trouble shooting 63 EA4. 1 Outdoor Unit : E. A 4. 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 : 9 U / A 4 Detective details: Detective Actuators:...
  • Page 157 Indicate or Display: Trouble shooting 64 EA4. 2 Outdoor Unit : E. A 4. 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 : 9U / A 4 Detective details:...
  • Page 158 Indicate or Display: Trouble shooting 65 EA5. 1 Outdoor Unit : E. A 5. 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 : 9 U / A 6 Detective details: Detective Actuators:...
  • Page 159 Indicate or Display: Trouble shooting 66 EA6. 3 Outdoor Unit : E. A 6. 3 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Heat Ex.1 gas temp. Error Filter LED Continuous Flash. Error Code : 9 U / A 6 Detective details:...
  • Page 160 Indicate or Display: Trouble shooting 67 EA6. 4 Outdoor Unit : E. A 6. 4 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Heat Ex.2 gas temp. Error Filter LED Continuous Flash. Error Code : 9 U / A 6 Detective details:...
  • Page 161 Indicate or Display: Trouble shooting 68 EAC. 4 Outdoor Unit : E. A C. 4 OUTDOOR UNIT Error Method: Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash, Outdoor unit Heat Sink Tempreture Filter LED Continuous Flash. Abnormal Error Code : 9 U / A C...
  • Page 162 Trouble shooting 69 EJ1. 1 Indicate or Display: RB UNIT Error Method: Outdoor Unit : E. 5 U.1 Indoor Unit : Operation LED 14 times Flash, Timer LED 1 Times Flash, Filter LED Continuous Flash. RB Unit EEPROM Access Abnormal Error Code : J 1 RB Unit...
  • Page 163 Trouble shooting 70 EJ1. 4 Indicate or Display: RB UNIT Error Method: Outdoor Unit : E. 1 4.1 / 1 4.2* Indoor Unit : 1st: Operation LED 13 times Flash, Timer LED 1 Times Flash, Filter LED Continuous Flash. RB Unit transmission PCB2 parallel 2nd:Operation LED 1 time Flash, Timer LED 4 Times Flash communication Error Error Code...
  • Page 164 Indicate or Display: Trouble shooting 71 Outdoor Unit : - - - - OUTDOOR UNIT Error Method: Indoor Unit : No Display Initial Setting Error Error Code : No Display * Service tool does not indicate the Error code Detective details: Detective Actuators: When no communication data can be received from the Inverter PCB at the time of power ON.
  • Page 165: Trouble Shooting No Error Code

    4-2-10 TROUBLE SHOOTING NO ERROR CODE Trouble shooting 72 Forecast of Cause : Indoor Unit - No Power 1. Power Supply failure 2. Outside cause 3. Electrical Component defective (Except wall mounted type) Check Point 1 : Power supply Is not the breaker down? Instant drop ----- Check if there is a large load electric apparatus in the same circuit.
  • Page 166 Trouble shooting 73 Forecast of Cause : Indoor Unit - No Power 1. Power Supply failure 2. Outside cause 3. Electrical Component defective (Wall mounted type) Check Point 1 : Power supply Is not the breaker down? Instant drop ----- Check if there is a large load electric apparatus in the same circuit. Momentary power failure ----- Check if there is a defective contact or leak current in the power supply circuit.
  • Page 167 Trouble shooting 74 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 Design ta &...
  • Page 168 Trouble shooting 75 Forecast of Cause : RB Unit - No Power 1. Power Supply failure 2. Outside cause 3. Electrical Component defective Check Point 1 : Power supply Is not the breaker down? Instant drop ----- Check if there is a large load electric apparatus in the same circuit. Momentary power failure ----- Check if there is a defective contact or leak current in the power supply circuit.
  • Page 169 Trouble shooting 76 Forecast of Cause : 1. Setting/Connection failure 2. Outside cause No Operation (Power is ON) 3. Electrical Component defective Check Point 1 : Check indoor, RB Unit 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 170 Trouble shooting 77 Forecast of Cause : No Cooling / No Heating 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 171 Trouble shooting 78 Forecast of Cause : 1. Abnormal installation (Indoor/Outdoor / RB Unit) 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)
  • Page 172 Trouble shooting 79 Forecast of Cause : Water Leaking 1. Erroneous installation 2. Drain hose failure 3. Float Switch failure Diagnosis method when water leak occurs Diagnosis method when water is spitting out Is Main Unit installed in stable condition? Is the filter clogged? Is Main Unit broken or deformed at the time of transportation or maintenance?
  • Page 173 Trouble shooting 80 Forecast of Cause : Outdoor air unit - No Power 1. Power Supply failure 2. Outside cause 3. Electrical Component defective Check Point 1 : Power supply Is not the breaker down? Instant drop ----- Check if there is a large load electric apparatus in the same circuit. Momentary power failure ----- Check if there is a defective contact or leak current in the power supply circuit.
  • Page 174 Indicate or Display: E39. 1 Trouble shooting 81 Outdoor Unit : E.5 U.1 (E39. 2) INDOOR UNIT Error Method: Error Code : 3 9 , 3 9 . 1 ( 2 ) Indoor Unit power supply error for FAN motor 1 (2) Detective details: Detective Actuators: When the DC power input for Fan motor <...
  • Page 175 Indicate or Display: Trouble shooting 82 E 4A.1 Outdoor Unit : E.5 U.1 INDOOR UNIT Error Method: Error Code : 4 A, 4 A. 1 Indoor unit suction air temp. thermistor error Detective Actuators: Detective details: Indoor Unit Controller PCB Circuit When Indoor unit suction air temp.
  • Page 176 Indicate or Display: Trouble shooting 83 E 4A.2 Outdoor Unit : E.5 U.1 INDOOR UNIT Error Method: Error Code : 4 A, 4 A. 2 Indoor unit discharge air temp. thermistor error Detective Actuators: Detective details: Indoor Unit Controller PCB Circuit When Indoor unit discharge air temp.
  • Page 177 Indicate or Display: Trouble shooting 84 E59. 2 Outdoor Unit : E.5 U.1 INDOOR UNIT Error Method: Error Code : 5 9, 5 9. 2 Indoor Unit Fan Motor 2 rotation speed Error Detective details: Detective Actuators: When the FAN motor feed back rotation value which is detecting on the Indoor Unit Controller PCB Circuit controller PCB becomes 0 and lasts for more than 1 minute at motor opera Indoor Fan Motor 2...
  • Page 178 Trouble shooting 85 E39. 3 Indicate or Display: INDOOR UNIT Error Method: Outdoor Unit : E.5 U.1 Indoor Unit Power Supply Error Error Code : 3 9 of AC24V System Detective details: Detective Actuators: When the AC voltage of the Power Trans output , Is lower than 24V. Indoor Unit Power Supply PCB Circuit Indoor Unit Power Trans Indoor Unit Controller PCB...
  • Page 179: Service Information

    4-3 SERVICE INFORMATION SERVICE INFORMATION Network communication Abnormal - Basic trouble shooting procedure - 1. Check Error code in one network segment separately, and check the Error code of (OU, IU, RB Error LED, RC, ST) < If the system has more than 2 Net work segments, disconnect the other Network segment.> 2.
  • Page 180 SERVICE INFORMATION RB Unit Abnormal (No Cooling, No Heating, Abnormal Noise) - Check functioning of Solenoid Valve * Valve or Pipe Blockage , Opposite operation of Valves can be the cause of Noise problem. - Check Solenoid coil position / connection - Chedk pipe temperautre difference during operation Solenoid valve Controlling SV No.
  • Page 181: Backup Operation

    4-4 SERVICE INFORMATION SERVICE INFORMATION Backup Operation Details : Backup operation is the operating method of replacing compressor while the system is running. Compressor can be replaced without stopping the system. In backup operation, cooling and heating capacity is decreased by the capacity of the separated outdoor unit.
  • Page 182 1-2. Backup operation when compressor of the slave unit #1 is broken. [Procedure] (Example: Three outdoor units are connected. the slave unit #1 is broken.) 1. Stop the operation, and turn off the all outdoor units. (Make sure the pressure equalization has been finished) 2.
  • Page 183: Work Procedure After The Backup Operation

    4-4-2 Work procedure after the backup operation 1. Refrigerant shortage at the backup operation When excessive refrigerant accumulates in the defective outdoor unit during the backup operation, it becomes capacity shortage by refrigerant shortage. The meaning of the sign LPS : Low pressure sensor detection value EEV1 : Expansion valve #1 EEV2 : Expansion valve #2 TH2 : Outdoor temperature sensor detection value...
  • Page 184 <How to respond, when refrigerant is deficient> Reuse the refrigerant of the broken master unit. Broken Substitutional Slave master unit master unit unit #1 Open and adjust High pressure (service port) All 3 Way-Valves Close Liquid Hp Gas Lp Gas Connect the high pressure service port of the broken master unit and the low pressure pipe of the broken master unit by pressure gauge.
  • Page 185: Service Parts Information

    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 Is any Indoor unit in operation? Check power supply voltage,open fuse.
  • Page 186 WHITE BLACK AOUA72,90 AOUA120 0.24 0.19 208 230 04-96...
  • Page 187 SERVICE PARTS INFORMATION 3 Main PCB Filter PCB (Main) Check Filter PCB (Main) -1 Is Fuse (5A/ 250V) open? Check Filter PCB (Main) -2 Replace Filter PCB (Main) PCB pattern and parts on PCB defective? Check Filter PCB (Main) -3 Replace Filter PCB (Main) (1) Replace blown fuse.
  • Page 188 SERVICE PARTS INFORMATION 4 Inverter PCB Filter PCB (INV) Check Filter PCB (INV) -1 (1) Using a tester, measure the resistance value of both ends of the fuses (P511/512/513). (*Cannot be checked visually.) Are Fuses (45A/500V) open? Check Filter PCB (INV) -2 Replace Filter PCB (INV) PCB pattern and parts on PCB defective? Check Filter PCB (INV) -3...
  • Page 189 SERVICE PARTS INFORMATION 5 Fan Driver PCB Check Fan motor Replace Fan motor Outdoor unit fan motor defective? Check Fuse of DC Fan motor (5A Fuse) Replace FUSE Blown Fuse ? Check Fan driver PCB -1 Replace Fan driver PCB PCB pattern and parts on PCB defective? Check Fan Driver PCB -2 Replace Fan driver PCB...
  • Page 190 SERVICE PARTS INFORMATION 6 Filter PCB(INV) Check Point 1 Measure the resistance of Filter PCB(INV) by following procedure. 1. Turn OFF the Outdoor unit(s) power supply 2. Disconnect the connection wires between the Filter PCB(INV) - Inverter PCB. 3. Measure the resistance value Good : Less that 150 Ohm NG: More than 150 Ohm Filter PCB(INV) [K11CE-1100HUE-FL0]...
  • Page 191 SERVICE PARTS INFORMATION 7 (Mounted on Inverter PCB) Check Point 1 Disconnect the connection wires between the Inverter PCB - electrolytic capacitor and Inverter PCB - Inverter Compressor. Inverter PCB Set the tester to the "Resistance" mode, and measure the resistance between the following terminals. Red wire (P) - screw terminals U/V/W White wire (N) - screw terminals U/V/W Judge the result of...
  • Page 192 SERVICE PARTS INFORMATION 9 3-Phase Diode Bridge Check Point 1 : Appearance check No fissures, breaks, damage, etc. at body and terminal section? Is the rear of the body coated with silicone grease? Are there no abnormalities at threaded parts (stripped threads, deformation, damage, etc.) ? Check Point 2 : Electric check In the 3-phase diode bridge single part state, set the tester to the "Diode"...
  • Page 193 SERVICE PARTS INFORMATION 10 Reactor Check Point 1 : Appearance check No fissures, breaks, damage, etc. at the body and winding section, terminals section? Check Point 2 : Electric check Set the tester to the "Resistance" mode, and check for open/short between both ends of the reactor wire (or connector).
  • Page 194 SERVICE PARTS INFORMATION 11 Resistor, Cement Check Point 1 : Appearance check No fissures, breaks, damage, etc. at the body and terminals section? Check Point 2 : Electric check 1. Surge prevention resistor (connected to magnetic contactor) Set the tester to the "Resistance" mode, and measure the resistance value between the terminals. (No polarity) Judge the result of as follows:...
  • Page 195 SERVICE PARTS INFORMATION 12 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 196 SERVICE PARTS INFORMATION 14 Indoor Unit Electronic Expansion Valve (EEV) Check Point 1 : Check Connections Check Point 2 : Check Coil of EEV Remove connector, check each winding resistance of Coil. Check Connectors (Loose connector or open cable.) Duct, Cassette, Wall mount °...
  • Page 197 SERVICE PARTS INFORMATION 15 Outdoor Unit Electronic Expansion Valve (EEV1) Check Point 1 : Check Connections Check connection of connector (CN116) (Loose connector or open cable) CN116 CN117 CN160 Check Point 3 : Check Noise at start up Check Point 2 : Check Coil of EEV1 Turn on Power and check operation noise.
  • Page 198 SERVICE PARTS INFORMATION 16 Outdoor Unit Electronic Expansion Valve (EEV2) Check Point 1 : Check Connections Check connection of connector (CN117) (Loose connector or open cable) CN116 CN117 CN160 Check Point 3 : Check Noise at start up Check Point 2 : Check Coil of EEV2 Turn on Power and check operation noise.
  • Page 199 SERVICE PARTS INFORMATION 17 Outdoor Unit Electronic Expansion Valve (EEV3) Check Point 1 : Check Connections Check connection of connector (CN160) (Loose connector or open cable) CN116 CN117 CN160 Check Point 3 : Check Noise at start up Check Point 2 : Check Coil of EEV3 Turn on Power and check operation noise.
  • Page 200 SERVICE PARTS INFORMATION 18 Outdoor Unit Solenoid Valve (SV1, SV2, SV3, SV4) Check Point 2 : Check Solenoid Coil Check Point 1 : Check connections Remove connector and check if coil is open. Check connection of connector. (Loose connector or open cable) °...
  • Page 201 Check Point 4-2 : Check operation of SV3 Check the operation noise when the connector of SV3 is removed. - When SV3 is open The sound of operation noise is heard ---> Normal The sound of operation noise is not heard. ---> Replace SV3 - When SV3 is closed The sound of operation noise is heard --->...
  • Page 202 SERVICE PARTS INFORMATION 19 4-WAY VALVE 1 (2) Check Point 1 : Check Circuit connection Check Point 2 : Check Solenoid Coil Check the connection of connector CN105 (CN156) Remove CN105 (CN156) from PCB and check the resistance value of coil Resistance Value BLUE 4WV1...
  • Page 203 SERVICE PARTS INFORMATION 20 Indoor Unit AC Fan Motor Check Point : ARUH36TLAV (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 19.8 Thermal protector...
  • Page 204 SERVICE PARTS INFORMATION 21 Indoor unit fan motor < DC motor > When you approach this part, please cut off the power supply and wait for a while until DC voltage has been discharged. Check Point 1 : Check rotation of Fan Rotate the fan by hand when operation is off.
  • Page 205 SERVICE PARTS INFORMATION 23 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. Characteristics of pressure sensor PRESSURE WHITE SENSOR...
  • Page 206 SERVICE PARTS INFORMATION 24 Pressure Switch Type of contact Pressure Characteristics of pressure switch 4.2 0.1MPa (609 14.5 psi) Contact : Short Open Contact : Open Short 3.2 0.15MPa (464 21.8 psi) SERVICE PARTS INFORMATION 25 Thermistor Check Point : Check Thermistor resistance value Remove connector and check Thermistor resistance value.
  • Page 207 SERVICE PARTS INFORMATION 26 RB Unit Solenoid Valve (SV1, SV2, SV3, SV4, SV5, SV6) Check Point 1 : Check Solenoid Coil Remove connector and check if coil is open. Solenoid Coil Resistance value SV1,SV2,SV3,SV4,SV5,SV6 1.35K + 7% >> If Resistance value is abnormal, replace Solenoid Coil. Check Point 2: Check Voltage from Main PCB Remove connector and check the voltage (AC208- 230V).
  • Page 208: Appending Data

    5. APPENDING DATA (UNIT)
  • Page 210: Refrigerant Circuit

    5-1 REFRIGERANT CIRCUIT MODELS : AOUA72TLBV, AOUA96TLBV, AOUA120TLBV Outdoor unit GAS LINE (High pressure) HEX1 4WV 1 EEV1 HPSW1 EEV3 TH10 HEX2 LIQUID LINE EEV2 4WV 2 SCHEX CMP1 (INV) TH11 FAN1 GAS LINE (Low pressure) Indoor unit1 TH21 FAN21 TH24 EEV21 RB unit1...
  • Page 211: Outdoor Unit

    SYMBOL DESCRIPTION Outdoor unit MARK DESCRIPTION CMP1 Compressor 1 (Inverter type) HEX1 Heat exchanger 1 HEX2 Heat exchanger 2 FAN1 Fan 1 Accumulator Receiver tanker Oil separator SCHEX Sub-cool heat exchanger High pressure sensor Low pressure sensor HPSW1 High pressure sensor switch 1 4WV1 4-way valve 1 4WV2...
  • Page 212 MODEL : UTP-RU01AH GAS LINE (Discharge gas) to Indoor unit GAS LINE (Suction gas) MODEL : UTP-RU01BH GAS LINE (Discharge gas) to Indoor unit GAS LINE (Suction gas) MODEL : UTP-RU01CH GAS LINE (Discharge gas) to Indoor unit GAS LINE (Suction gas) 05 - 03...
  • Page 213 MODEL : UTP-RU04BH GAS LINE (Suction gas) LIQUID LINE GAS LINE (Discharge gas) to Indoor unit to Indoor unit to Indoor unit to Indoor unit to Indoor unit to Indoor unit to Indoor unit to Indoor unit SYMBOL DESCRIPTION MARK DESCRIPTION Solenoid valve (Suction 1) Solenoid valve (Suction 2)
  • Page 214 5-2 WIRING DIAGRAM 5-2-1 Indoor Unit COMPACT CASSETTE TYPE MODELS : AUUA7TLAV, AUUA9TLAV, AUUA12TLAV, AUUA14TLAV, AUUA18TLAV, AUUA24TLAV 05 - 05...
  • Page 215 CASSETTE TYPE MODELS : AUUB18TLAV, AUUB24TLAV, AUUB30TLAV, AUUB36TLAV 05 - 06...
  • Page 216 SLIM DUCT / SLIM CONCEALED FLOOR TYPE MODELS : ARUL7TLAV, ARUL9TLAV, ARUL12TLAV, ARUL14TLAV, ARUL18TLAV 05 - 07...
  • Page 217 MEDIUM STATIC PRESSURE DUCT TYPE MODEL : ARUM24TLAV MODEL : ARUM30TLAV, ARUM36TLAV 05 - 08...
  • Page 218 HIGH STATIC PRESSURE DUCT TYPE MODELS : ARUH36TLAV, ARUH48TLAV, ARUH60TLAV 05 - 09...
  • Page 219 FLOOR / CEILING TYPE MODELS : ABUA12TLAV, ABUA14TLAV, ABUA18TLAV, ABUA24TLAV 05 - 10...
  • Page 220: Ceiling Type

    CEILING TYPE MODELS : ABUA30TLAV, ABUA36TLAV 05 - 11...
  • Page 221 WALL MOUNTED TYPE MODELS : ASUA7TLAV, ASUA9TLAV, ASUA12TLAV, ASUA14TLAV 05 - 12...
  • Page 222 MODELS : ASUB18TLAV, ASUB24TLAV 05 - 13...
  • Page 223 5-2-2 Outdoor Unit MODELS : AOUA72TLBV, AOUA96TLBV, AOUA120TLBV Note : *1 X1, X2 : To be connected to indoor unit or RB unit Z1, Z2 : To be connected to other master outdoor unit H1, H2 : To be connected to outdoor unit within same refrigerant system 05 - 14...
  • Page 224 5-2-3 RB Unit MODEL : UTP-RU01AH MODEL : UTP-RU01BH 05 - 15...
  • Page 225 MODEL : UTP-RU01CH 05 - 16...
  • Page 226 MODEL : UTP-RU04BH 05 - 17...
  • Page 227: Outdoor Air Unit

    5-2-4 Outdoor Air Unit MODELS : AAUA48TLAV MODELS : AAUA72TLAV 05 - 18...
  • Page 228 MODELS : AAUA96TLAV 05 - 19...
  • Page 229: Vertical Air Handler

    5-2-5 Vertical Air Handler MODELS : ARUV12TLAV, ARUV18TLAV, ARUV24TLAV, ARUV30TLAV, ARUV36TLAV, ARUV48TLAV, ARUV60TLAV 05 - 20...
  • Page 230: Disassembly Process

    6. DISASSEMBLY PROCESS...
  • Page 231 6.DISASSEMBLY/ASSEMBLYPROCESS 6.1 Indoor Unit CAUTION Before servicing the unit, turn the power supply switch OFF, When you approach PWB, be sure to equip with the electrostatic removal band. (PWB maybe broken by static electricity.) 1. Indoor unit Transmisson PCB removal 1.
  • Page 232 6.2 Outdoor Unit 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 Model : AJUA72_96TLBV (S chassis) AJUA120TLBV (L chassis) 2.
  • Page 233 4. Layout plan in CONTROL BOX Resistor, cement Magnetic Relay Resistor, cement Reactor (Rush current protection) (Rush current protection) (Discharge from capacitor) Filter PCB Secondary Fan driver PCB (3 phase) Diode Bridge Coil Filter PCB Inverter PCB (1 phase) Phase CT PCB Filter PCB Primary (3 phase)
  • Page 234 6. Main PCB removal Spacers Spacers (3 places) (4 places) Main PCB Earth screw Remove the connectors and earth screw. Remove the spacers. CAUTION The model name is written in Main PCB of the outdoor unit and indoor unit, and when the factory of the product is shipped, it is written. However ,the model name is not written in the Main PCB supplied for the repair.
  • Page 235 7. Inverter PCB removal Screws Screws (For Capacitor) (For CT PCB) Remove the 5 mounting screws and codes. Inverter PCB Screws Screws (For IPM) (For Magnetic relay) Spacers (4 places) Remove the 2 mounting screws. Remove the mounting screw and code. Note the tightening torque at the installation.
  • Page 236 8. Fan driver PCB removal Spacers Screws Spacers Fan driver PCB (For IPM) Remove the connectors. Remove the 2 mounting screws and the spacers. Note the tightening torque at the installation. Tightening torque is as follows. - Temporary tightening : 0.3 +0.1N m - Final tightening : 1.3 +0.1N m Heat sink L...
  • Page 237 9. PANEL BTM removal Screws (7 places) Hook (3 places) Remove the 7 mounting screws. Remove the PANEL BTM by sliding toward. 10. Control Box open Screws (2 places) Remove the 2 mounting screws. Loose or remove the cable ties. Remove the locking stopper (3 places) of edging saddle.
  • Page 238 11. THERMISTORS removal Cut the binder. Remove the heat insulation. 12. SOLENOID COILS (4way valve and Solenoid valves) removal Remove the mounting screw. Remove the SOLENOID COIL. 13. EEV COILS removal Remove the EEV coil by hand. There are two coils. 14.
  • Page 239 15. Fan motor removal Remove the Fan Guard. Remove the nut. Note the tightening torque at the installation. Tightening torque is from 15 to 20N m. Remove the Propeller fan. Cut the cable tie. Remove the 4 mounting screws. Remove the Fan motor. Note at the installation.
  • Page 240: Compressor Removal

    17. 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 Panel top and Panel btm. (3) Remove the Control Box. (4) Fully close the 3-way valve (Discharge gas), (Suction gas), and (Liquid).
  • Page 241 Comp.cover Comp. cover (Body) (Top) Color: White& Color: White Comp. cover Green (Accumulator) Color: white Comp. cover (Outside) Color: Green Remove the Compressor cover (Top). Remove the Compressor cover (Outside), Compressor cover (Accumulator), and Note : Compressor cover (Top) consists of 2 parts. Compressor cover (Body).
  • Page 242 Range Range Cut the Discharge pipe in this range. Cut the Suction pipe in this range. Remove the Compressor. Caution Keep their shape better. There is a possibility of catching fire to oil when removing by the welding without cutting it. Procedure for compressor installation.
  • Page 243 18. Precautions for exchange of 4 way valve A Assy 4 way valve A assy includes a " Fusible plug ". Be aware of the followings when repairing. 1. Fusible plug Plug made of fusible alloy. When a temperature inside equipment extreamly rises by fire disaster, fusible alloy of plug will melt and make a hole.
  • Page 244 19. Precautions for when replacing refrigerant-cycle-parts (1) During replacement of 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 246 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.