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LG ARUB80LT2 Installation Manual

Multi v sync ii type arub series outdoor unit
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INSTALLATION MANUAL
AIR CONDITIONER
• Please read this installation manual completely before installing the product.
• Installation work must be performed in accordance with the national wiring
standards by authorized personnel only.
• Please retain this installation manual for future reference after reading it
thoroughly.
TYPE :
P/NO : MFL46912302
www.lg.com

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Summary of Contents for LG ARUB80LT2

  • Page 1 • Please read this installation manual completely before installing the product. • Installation work must be performed in accordance with the national wiring standards by authorized personnel only. • Please retain this installation manual for future reference after reading it thoroughly. TYPE : www.lg.com P/NO : MFL46912302...

  • Page 2: Table Of Contents

    ARUB Series Outdoor Unit Installation Manual TABLE OF CONTENTS Safety Precautions ........................3 Installation Process ........................7 Outdoor Unit Information ......................9 Select the Best Location......................10 Installation Space........................12 Lifting method .........................16 Installation ..........................17 Refrigerant piping installation ....................22 Electrical Wiring ........................43 HR unit PCB ..........................52 Master Unit and Slaver Unit PCB ...................63 Test Run ...........................70 Caution For Refrigerant Leak....................91...

  • Page 3: Safety Precautions

    Safety Precautions Safety Precautions To prevent injury to the user or other people and property damage, the following instructions must be followed. I Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the following indications. This symbol indicates the possibility of death or serious injury.
  • Page 4 Safety Precautions When installing and moving the air conditioner to Do not reconstruct to change the settings of the pro- another site, do not charge it with a different refriger- tection devices. ant from the refrigerant specified on the unit. •...
  • Page 5 Safety Precautions I Installation Always check for gas (refrigerant) leakage after instal- Do not install the product where the noise or hot air lation or repair of product. from the outdoor unit could damage the neighbor- hoods. • Low refrigerant levels may cause failure of •...
  • Page 6 Safety Precautions Be very careful about product transportation. • Only one person should not carry the product if it weighs more than 20 kg. • Some products use PP bands for packaging. Do not use any PP bands for a means of transportation. It is dangerous. •...

  • Page 7: Installation Process

    Installation Process Installation Process Indicate clearly who is to be responsible for switch settings Determination of division work Make relationship between outdoor, indoor, remote controller, and option connections clear. Preparation of contract drawings (Prepare control circuit diagram) Take account of gradient Sleeve and insert work The foundation must be level Outdoor unit foundation work...
  • Page 8 3) Select a well-drained place. 1. If you can’t meet above guide line in the seaside installation, please contact LG Electronics for the additional anticorrosion treatment. 2. Periodic ( more than once/year ) cleaning of the dust or salt particles stuck on the heat exchanger by using water...

  • Page 9: Outdoor Unit Information

    Hp(Equivalent Hp) Model Name ARUB220LT2 ARUB240LT2 ARUB260LT2 ARUB280LT2 ARUB300LT2 ARUB320LT2 ARUB340LT2 Combination Unit ARUB140LT2 ARUB160LT2 ARUB140LT2 ARUB140LT2 ARUB160LT2 ARUB160LT2 ARUB140LT2 ARUB80LT2 ARUB80LT2 ARUB120LT2 ARUB140LT2 ARUB140LT2 ARUB160LT2 ARUB120LT2 ARUB80LT2 Refrigerant 8+8+8 CF(Correction Factor) No. of Max. Connectable Indoor units 35(44) 39(48)

  • Page 10: Select The Best Location

    Select the Best Location Select the Best Location I Select installation location of the outdoor unit suitable for following conditions Select space for installing outdoor unit, which will meet the following conditions: • No direct thermal radiation from other heat sources •...
  • Page 11 Installation Space n Select installation location of the HR unit suitable for following conditions • Avoid a place where rain may enter since the HR unit is for indoor. • Sufficient service space must be obtained. • Refrigerant pipe must not exceed limited length. •...

  • Page 12: Installation Space

    Installation Space Installation Space Individual Installation I Basic space required A space of at least 250 mm is necessary at the back for inlet air. Taking servicing, etc. from the rear into account, a space of about 700 mm should be provided, the same as at the front. 700 mm or more (Control box is of a open/close type) Rear Side Rear Side...
  • Page 13 Installation Space I When unit is surrounded by walls 700 mm or more (Control box is of a open/close type) 250 mm or more Rear Side Rear Side Front Side Front Side Rear Side Rear Side Front Side Front Side I When there is an obstruction above the unit 45°...
  • Page 14 Installation Space Collective / Continuous installation Space required for collective installation and continuous installation:When installing several units, leave the space between each block as shown below considering passage for air and people. (Be opened) 900mm or more (control box is of a open/close type) 250 mm or more 150 mm or more Rear Side...
  • Page 15 Installation Space Cautions in winter especially for seasonal wind • Sufficient measures are required at a snow area or severe cold area in winter so that product can be operated well. • Get ready for seasonal wind or snow in winter even in other area. •...

  • Page 16: Lifting Method

    Lifting Method Lifting method • When carrying the unit suspended, pass the ropes under the unit and use the two suspension points each at the front and rear. • Always lift the unit with ropes attached at four points so that impact is not applied to the unit. •...

  • Page 17: Installation

    Installation Installation Location of anchor bolt I Individual installation 900±2 900±2 900±2 I Example of collective installation 900±2 900±2 900±2 900±2 900±2 900±2 I Installation foot (Location of anchor bolt) Installation Manual 17...
  • Page 18 Installation Foundation for Installation • Fix the unit tightly with bolts as shown below so that unit will not fall down due to earthquake or gust. • Use the H-beam support as a base support • Noise and vibration may occur from the floor or wall since vibration is transferred through the installation part depending on installation status.
  • Page 19 Installation Preparation of Piping Main cause of gas leakage is defect in flaring work. Carry out correct flaring work in the following procedure. 1) Cut the pipes and the cable. I Use the accessory piping kit or the pipes purchased Copper Slanted Uneven Rough locally.
  • Page 20 Installation Flare shape and flare nut tightening torque Precautions when connecting pipes • See the following table for flare part machining dimensions. • When connecting the flare nuts, apply refrigerant oil to the inside and outside of the flares and turn them three or four times at first.
  • Page 21 Installation Heat insulation 1. Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance (over 120°C). Fastening band (accessory) 2. Precautions in high humidity circumstance: This air conditioner has been tested according to the "KS Standard Conditions with Mist" and confirmed that there is not any default.

  • Page 22: Refrigerant Piping Installation

    Refrigerant piping installation Refrigerant piping installation WARNING Always use extreme care to prevent the refrigerant gas (R-410A) from the leakage while using fire or flame. If the refrigerant gas comes in contact with the flame from any source, such as a gas stove, it breaks down and generates a poisonous gas which can cause gas poisoning.
  • Page 23 Refrigerant piping installation When connecting the pipes from the front of Knock out the outdoor unit, remove part and part Communication Line Hole When connecting the pipes from the side of the Power Cable Hole outdoor unit, remove part (the whole "Knock Pipe Hole out"...
  • Page 24 Refrigerant piping installation Connection of Outdoor Units 2 outdoor units Model Low Pressure Gas Pipe Liquid Pipe High Pressure Gas Pipe Ø 9.52 Ø34.9 Ø22.2 Ø19.05 Ø28.58 Ø12.7 Ø28.58 Ø31.8 Ø19.05 Ø12.7 Ø15.88 Ø19.05 Ø28.58 Ø22.2 Ø12.7 Ø22.2 Ø22.2 Ø28.58 Ø15.88 ARCNB20 Ø15.88...
  • Page 25 Refrigerant piping installation Installation procedure for HR unit 1. Using an insert-hole-in- anchor, hang the hanging bolt. 2. Install a hexagon nut and a flat washer (locally-procured)to the hanging bolt as shown in the figure in the bottom, and fit the main unit to hang on the hanger metal. Six-sided Nut (M10 or M8) 3.
  • Page 26 Refrigerant piping installation Type of HR Unit Select an HR unit according to the number of the indoor units to be installed. HR units are classified into 3 types by the number of connectable indoor units. Ex) Installation of 6 indoor units Consists of HR unit for 4 rooms and HR unit for 2 rooms.
  • Page 27 Refrigerant piping installation [ Reducers for indoor unit and HR unit ] (Unit: mm) Gas pipe Models Liquid pipe High pressure Low pressure Indoor unit reducer OD9.52 Ø6.35 OD15.88 Ø12.7 OD19.05 Ø15.88 Ø12.7 OD22.2 Ø19.05 Ø15.88 PRHR020 OD9.52 Ø6.35 OD12.7 Ø9.52 OD15.88 Ø12.7...
  • Page 28 Refrigerant piping installation Caution 1. Use the following materials for refrigerant piping. • Material: Seamless phosphorous deoxidized copper pipe • Wall thickness : Comply with the relevant local and national regulations for the designed pressure 3.8MPa. We recommend the following table as the minimum wall thickness. Outer diameter 6.35 9.52...
  • Page 29 Refrigerant piping installation WARNING When installing and moving the air conditioner to another site, be sure to make recharge refrigerant after perfect evacuation. - If a different refrigerant or air is mixed with the original refrigerant, the refrigerant cycle may malfunction and the unit may be damaged.
  • Page 30 Refrigerant piping installation Refrigerant piping system Example : 3 outdoor units, 4 HR units and 11 indoor units Outdoor unit Y branch HR unit Indoor unit Slave 2 Slave 1 Master "a" "b" I Case 1 ("a") : Maximum height is 15 m if you install with Y branch. I Case 2 ("b") : Height is zero(0) m in HR unit serial connector.
  • Page 31 Refrigerant piping installation ➲ Refrigerant pipe diameter between branches and HR units (B,C,D) Gas pipe [mm(inch)] Liquid pipe Downward indoor unit total capacity [mm(inch)] [kW(Btu/h)] Low pressure High pressure < 5.6 (19,100) Ø6.35(1/4) Ø12.7(1/2) Ø9.52(3/8) < 16.0 (54,600) Ø9.52(3/8) Ø15.88(5/8) Ø12.7(1/2) <...
  • Page 32 Refrigerant piping installation 1) Keep the 40m distance from the first branch to the farthest indoor. 2) Keep the horizontal level between HR units.( for example, the same flour. ) It's not allowed 1) under 40m Height 2) Same horizontal level Indoor Indoor Indoor...
  • Page 33 Refrigerant piping installation N Outdoor Unit Connection ➲ Refrigerant pipe diameter before 1st branch (A,E,F) Gas pipe [mm(inch)] Liquid pipe Upward outdoor unit total capacity [mm(inch)] [HP] Low pressure High pressure Ø9.52(3/8) Ø19.05(3/4) Ø15.88(5/8) Ø9.52(3/8) Ø22.2(7/8) Ø19.05(3/4) Ø12.7(1/2) Ø28.58(1 Ø19.05(3/4) 14, 16 Ø12.7(1/2) Ø28.58(1...
  • Page 34 Refrigerant piping installation Connection between outdoor and outdoor unit I Example of Pipe Connection between Outdoor 1. Pipe Connection between Outdoors Differnce in height between outdoor units Less than 5m( h1 5m). Longest Pipe Length between Outdoors Less than 10m, after 1st branch. Less than 10 m 2.
  • Page 35 Refrigerant piping installation 3. In case pipe length between outdoors is 2m or more. When the piping length between Branch of Outdoor units or between Branch and outdoor units Is 2 m or more, prepare a oil trap (200 mm or more as shown below) on the gas pipe line location Less than 2 m from branch.
  • Page 36 Refrigerant piping installation N The Amount of Refrigerant The calculation of the additional charge should take account of the length of pipe. Product charge(1unit)=8kg Ex) 10HP Outdoor unit Additional charge (kg) HR unit (1EA) Indoor unit Total liquid pipe (m): Ø22.2mm x 0.354(kg/m) x 0.266(kg/m) Total liquid pipe (m): Ø19.05mm...
  • Page 37 Refrigerant piping installation Product Charge(kg) CF(kg) Product Charge(kg) CF(kg) Note: Fill in the f-gas Label attached on outdoor about the quantity of the fluorinated greenhouse gases Manufacturing site (See Model Name label) Installation site (If possible being placed adjacent to the service points for the addition or removal of refrigerant) The total Charge ( + ) WARNING Regulation for refrigerant leakage...
  • Page 38 Refrigerant piping installation Branch pipe Fitting Y branch To Outdoor Unit To Branch Piping or Indoor Unit • Ensure that the branch pipes are attached horizontally or vertically (see the diagram below.) Horizontal Facing Facing plane downwards upwards Within +/- 10° Viewed from point A in direction of arrow Within ±...
  • Page 39 Refrigerant piping installation N Y branch pipe [unit:mm] Models Low Pressure Gas Pipe Liquid pipe High Pressure Gas Pipe I.D 6.35 I.D 12.7 I.D 12.7 I.D15.88 I.D 9.52 I.D 15.88 I.D9.52 I.D 9.52 I.D12.7 I.D9.52 I.D12.7 ➀ ➀ ARBLB01621 I.D 6.35 I.D9.52 I.D15.88 I.D 15.88...
  • Page 40 Refrigerant piping installation Leak Test and Vacuum (1) Leak test Leak test should be made by pressurizing nitrogen gas to 3.80MPa(38.7 kgf/cm ). For the test method, refer to the following fig- ure. (Make a test with the service valves closed. Be also sure to pres- surize low pressure gas pipe and liquid pipe simultaneously) The test result can be judged good if the pressure has not be reduced after leaving for about one day after completion of nitrogen gas pres-...
  • Page 41 Refrigerant piping installation (3) Refrigerant Charged Method After vacuum completion, primarily charge the calculated amount of additional refrigerant through the high pressure gas pipe and the liquid pipe. If the refrigerant is not charged any more, secondarily charge the remaining refrigerant through the low pressure gas pipe and the liquid pipe. Vacuum and Primary charging Secondary charging High pressure gas pipe...
  • Page 42 Refrigerant piping installation Thermal insulation of refrigerant piping Be sure to give insulation work to refrigerant piping by covering liquid pipe and gas pipe separately with enough thickness heat-resistant polyethylene, so that no gap is observed in the joint between indoor unit and insulating material, and insulating materials themselves.

  • Page 43: Electrical Wiring

    Electrical Wiring Electrical Wiring Areas of Caution 1. Follow ordinance of your governmental organization for technical standard related to electrical equipment, wiring regulations and guidance of each electric power company. WARNING Be sure to have authorized electric engineers do electric work using special circuits in accordance with regulations and this instal- lation manual.
  • Page 44 Electrical Wiring CAUTION • Use the 2-core shield cables for communication lines. Never use them together with power cables. • Never use multi-core cable • As this unit is equipped with an inverter, to install a phase leading capacitor not only will deteriorate power factor improvement effect, but also may cause capacitor abnormal heating.
  • Page 45 Electrical Wiring Control box and connecting position of wiring - Remove all of the screws on front panel, and remove the front panel by pulling it forward. - Connect communication line between main and sub outdoor unit through the terminal block. - Connect communication lines between outdoor unit and indoor/HR units through the terminal block.
  • Page 46 Electrical Wiring Communication and Power Lines 1) Communication cable • Types : shielding wire • Cross section : over 1.25mm • Maximum allowable temperature: 60°C • Maximum allowable line length: under 1,000m 2) Remote control cable • Types : 3-core cable 3) Simple central control cable •...
  • Page 47 Electrical Wiring N Wiring of Main Power Supply and Equipment Capacity Outdoor unit (3Ø, 380 ~415V, 50Hz/3Ø, 380V, 60Hz ) Indoor unit (1Ø, 220V, 50Hz/60Hz) 1. Use a separate power supply for the outdoor unit and indoor unit. 2. Bear in mind ambient conditions (ambient temperature,direct sunlight, rain water,etc.) when proceeding with the wiring and connections.
  • Page 48 Electrical Wiring N Example Connection of Communication Cable 1 Outdoor Unit 3 phase 4 wires power line Communication line (3 line): wired remote control Single phase of power supply line Power supply switch Communication line (2 shield line): between indoor unit and outdoor unit (Switch fuse : ELCB) ❈...
  • Page 49 Electrical Wiring N Example Connection of Communication Cable 2 Outdoor Units 3 phase 4 wires power line(R, S, T) I When the power source is connected Master Communication line (3 line): wired remote control In series between the units. Slave Single phase of power supply line Communication line (2 shield line): Power supply switch...
  • Page 50 Electrical Wiring N Example Connection of Communication Cable 3 Outdoor Units Master I When the power source is connected 3 phase 4 wires power line(R, S, T) In series between the units. Slave1 Communication line (3 line): wired remote control Slave2 Single phase of power supply line Communication line (2 shield line):...
  • Page 51 Electrical Wiring N Example Connection of Communication Cable [BUS type] [STAR type] • Connection of communication cable must be installed • Abnormal operation can be caused by communication like below figure between indoor unit to outdoor unit. defect, when connection of communication cable is installed like below figure(STAR type).

  • Page 52: Hr Unit Pcb

    HR Unit PCB HR Unit PCB #4 valve housing #1 valve housing #1 cooling valve LED(green) #1 heating valve LED(red) 7-SEG SW05M (Switch for addressing HR unit) SW01M SW02M SW01M/SW03M/SW04M (Dip switch for setup of (Switch for manual valve SW03M SW04M the function of HR unit) addressing)
  • Page 53 HR Unit PCB 2) Selection of the model of the HR unit (For 2 rooms) (For 3 rooms) (For 4 rooms) PRHR020 PRHR040 PRHR040 Initial Setting 1 room Connected 2 rooms Connected 3 rooms Connected 4 rooms Connected ❈ Each model is shipped with the switches No.2 and No.3 pre-adjusted as above in the factory. WARNING •...
  • Page 54 HR Unit PCB 3) Setting the Valve Group. DIP S/W setting Example Indoor Unit Indoor Unit Not control Indoor Unit Indoor Unit Indoor Unit No.1, 2 Valve Indoor Unit Large capacity indoor unit Control Indoor Unit No.2, 3 Valve Large capacity indoor unit Control Indoor Unit No.3, 4 Valve...
  • Page 55 HR Unit PCB 2. SW05M (Rotary S/W for addressing HR unit) Must be set to '0' when installing only one HR unit. When installing multiple HR units, address the HR units with sequentially increasing numbers starting from '0'. Ex) Installation of 3 HR units 3.
  • Page 56 HR Unit PCB Flow chart for auto addressing for indoor units and HR units 1) Auto addressing for indoor unit 2) Auto pipe detection 3) Manual pipe detection(Execute in case of Auto pipe detection failure) • Turn off all the indoor units before auto addressing. If indoor unit is operated, auto addressing would not be completed.
  • Page 57 HR Unit PCB WARNING 1. Execute auto addressing and auto pipe detection again whenever the indoor PCB and HR unit PCB is replaced. • Operation error occurs unless power is applied to the indoor and HR units. 2. Error No.200 occurs if the number of connected indoor units and that of scanned indoor units are different.
  • Page 58 HR Unit PCB Flow chart of auto-addressing for indoor units Turn HR unit , indoor unit and outdoor unit on in the order named. Wait for 3 minutes Press SW02V of the outdoor unit main PCB for 5 seconds '88' is displayed on outdoor unit main PCB and HRunit PCB The number of the indoor units connected is displayed at 7-SEG of the outdoor unit main PCB...
  • Page 59 HR Unit PCB Flow chart of auto addressing for pipe detection Confirmation of indoor unit address setting Outdoor unit is operated for 5~30 minues. Turn No.1 of SW02M of HR unit PCB off. Is the pipe setting condition Confirm that the setting of No.2, 3 of satisfied during the operation of SW02M corresponds with the number of indoor unit?
  • Page 60 HR Unit PCB Flow chart of manual addressing for pipe detection Execute in case of Auto pipe detection Wait for about 5 minutes. failure The number of the indoor units installed is Turn No.1 of SW02M of HR unit PCB on. displayed.
  • Page 61 HR Unit PCB Example of manual valve addressing (In case that an indoor unit of central control address "11" is connected to a valve #1 of an HR unit) • Prerequisite for manual valve addressing: central control address of each indoor unit must be preset differ- ently at its wired remote control Display and setup Setup and Contents...
  • Page 62 HR Unit PCB Example of checking valve address (In case that an indoor unit of central control address "11" is connected to a valve #1 of an HR unit) Display and Setup Setup and Contents • Operation: Turn dip S/W No.1 on. •...

  • Page 63: Master Unit And Slaver Unit Pcb

    Main PCB Main PCB Main PCB SW01B SW02B (DIP S/W) (DIP S/W) 7 - Segment SW02V Auto addressing SW01V Data confirm Installation Manual 63...
  • Page 64 Main PCB DIP switch setting I Checking according to dip switch setting 1. You can check the setting values of the main outdoor unit from the 7 segment LED. The dip switch setting should be changed when the power is OFF. 2.
  • Page 65 Main PCB I Setting the DIP switch • If you set the Dip switch when power is on, the changed setting will not be applied immediately. The changed setting will be enabled only when Power is reset or by pressing Reset button. 1.
  • Page 66 Main PCB Function Function SW01B Setting SW01B Setting SW02B Setting SW02B Setting Remarks Rema Outdoor Unit Fan Power reset is Low Static necessary Pressure Compensation 9 10 11 12 13 14 Outdoor Unit Fan Power reset is High Static necessary Pressure Compensation 9 10 11 12 13 14...
  • Page 67 Main PCB 2. Settings of slave outdoor unit Function Function SW01B Setting SW01B Setting SW02B Setting SW02B Setting Remarks Remarks Slave 1 Slave 1 9 10 11 12 13 14 9 10 11 12 13 14 Slave 2 Slave 2 9 10 11 12 13 14 9 10 11 12 13 14 Slave 3...
  • Page 68 Main PCB Group Number setting Group Number setting for Indoor Units Confirm the power of whole system(Indoor Unit, Outdoor Unit) is OFF, otherwise turn off. The communication lines connected to INTERNET terminal should be connected to central control of Outdoor unti with care for their polarity( A ¡...
  • Page 69 Main PCB WARNING • Valve address and central control address of its corresponding indoor unit should be set identical in manual addressing. Valve (04) Indoor unit (04) Valve (03) Indoor unit (03) HR unit Valve (02) Indoor unit (02) Valve (01) Indoor unit (01) Central control address Installation Manual 69...

  • Page 70: Test Run

    Test Run Test Run Checks Before Test Run Check to see whether there is any refrigerant leakage, and slack of power or communication cable. Confirm that 500 V megger shows 2.0 MΩ or more between power supply terminal block and ground. Do not operate in the case of 2.0 MΩ...
  • Page 71 Test Run How to Cope with Test Run Abnormality The phenomena from main component failure Component Phenomenon Cause Check method and Trouble shooting Not operating Motor insulation broken Check resistance between terminals and chassis Compressor Stop during running Motor insulation failure Check resistance between terminals and chassis High pressure error...
  • Page 72 Test Run Sensor Checking Function Note 1) Sensor checking function judges whether the current temperature of indoor and outdoor unit sensors is right or not. -3 indoor temperature sensors, 9 outdoor temperature sensors, 2 outdoor pressure sensors. It is used for judging sensor abnormality. Note 2) Note 1.
  • Page 73 Test Run Sensor Check Error Code Display In case error occurs during sensor checking process, error display is as shown below. Following contents are displayed one after the other on the main PCB of master outdoor unit. Indoor sensor error : Outdoor sensor error : * 5 number of errors is displayed Displaying error content...
  • Page 74 Test Run Refrigerant Auto Charging Function This function charges appropriate amount of refrigerant automatically through cycle operation. It can be used when refrigerant amount Isn't certain because of SVC and leakage. Note Start 1. After installing the refrigerant charging device as shown below in figure, Main PCB Wait for 3 min.
  • Page 75 Test Run manifold Gas Pipe Liquid Pipe Capillary Assembly Procedure 1. Arrange manifold,capillary assembly, refrigerant vessel and scale 2. Connect manifold to the gas pipe service valve of ODU as shown in the figure. 3. Connect manifold and Capillary tube. Use designated capillary assembly only.
  • Page 76 Test Run Refrigerant Checking Function 1. This function charges appropriate amount of refrigerant automatically through cycle operation. 2. This function judges refrigerant leakage and overcharging. 3. It can be used with refrigerant auto charging function. Start Note 1. In case air temperature is out of guaranteed Main temperature, refrigerant checking function may end Wait for 3 min.
  • Page 77 Test Run CAUTION 1. Guaranteed Temperature range(Error occurs out of guaranteed temperature range) IDU : 20~32°C ODU : 10~38°C 2. Set IDU wired remote controller temperature sensor setting as 'IDU'. 3. Make certain that IDU doesn't run with thermo off mode during operation. [ Error contents about auto refrigerant charging function ] : Temperature Range Error (In case that IDU or ODU is out of range) : System Unstable Error (In case, After 45 min operating the system, it does not be stable)
  • Page 78 Test Run Night silent operation Function In cooling mode, this function makes the ODU fan operate at low RPM to reduce the fan noise of ODU at night which has low cooling load. Max. RPM setting method Master ODU Dip S/W No.12+14 ON SW01B Master ODU Main PCB Power Reset...
  • Page 79 Test Run Vacuum Mode This function is used for creating vacuum in the system after compressor replacement, ODU parts replacement or IDU addition/replacement. Vacuum mode setting method Vacuum mode cancellation method Main PCB ODU power reset Master main PCB DIP switch OFF( No.11,14) SW01S Main PCB Power reset...
  • Page 80 Test Run Self-Diagnosis Function Error Indicator • This function indicates types of failure in self-diagnosis and occurrence of failure for air condition. • Error mark is displayed on display window of indoor units and wired remote controller, and 7-segment LED of outdoor unit control board as shown in the table.
  • Page 81 Test Run Display Title Cause of Error Master Outdoor Unit Inverter DC charging is not performed at Master outdoor unit Compressor DC link Low Voltage after starting relay turn on. DC charging is not performed at Slave1 outdoor unit Slave1 Outdoor Unit Inverter after starting relay turn on.
  • Page 82 Test Run Display Title Cause of Error Master Outdoor Unit Inverter System is turned off by Master Outdoor Unit Inverter Compressor High Discharge Compressor High Discharge Temperature Temperature Slave1 Outdoor Unit Inverter System is turned off by Slave1 Outdoor Unit Inverter Compressor High Discharge Compressor High Discharge Temperature Temperature...
  • Page 83 Test Run Display Title Cause of Error Master Outdoor Unit Inverter Master Outdoor Unit Inverter Compressor CT Sensor Compressor CT Sensor Fault open or short Slave1 Outdoor Unit Inverter Slave1 Outdoor Unit Inverter Compressor CT Sensor Compressor CT Sensor Fault open or short Slave2 Outdoor Unit Inverter Slave2 Outdoor Unit Inverter Compressor CT Sensor...
  • Page 84 Test Run Display Title Cause of Error Master Outdoor Unit Heat Exchanger Temperature Master Outdoor Unit Heat Exchanger Temperature Sensor Sensor (Front side) open or short (Front side) Fault Slave1 Outdoor Unit Heat Exchanger Temperature Slave1 Outdoor Unit Heat Exchanger Temperature Sensor Sensor (Front side) open or short (Front side) Fault Slave2 Outdoor Unit Heat...
  • Page 85 Test Run Display Title Cause of Error Omitting connection of R Omitting connection of Master Outdoor Unit power of Outdoor unit = 50 Error Omitting connection of Slave1 Outdoor Unit ❈ Note Omitting connection of S power of Outdoor unit = 23 Error Omitting connection of Slave2 Outdoor Unit Omitting connection of T power of Outdoor unt...
  • Page 86 Test Run Display Title Cause of Error Constant CT Sensor Error of Constant CT Sensor open or short of Master Outdoor Master Outdoor Unit Unit Constant CT Sensor open or short of Slave1 Outdoor Constant CT Sensor Error of Slave1 Outdoor Unit Unit Constant CT Sensor open or short of Slave2 Outdoor Constant CT Sensor Error of...
  • Page 87 Test Run Display Title Cause of Error Master Outdoor Unit Fan Current is over 5A Master Outdoor Unit Fan Over Current Error Slave1 Outdoor Unit Fan Over Slave1 Outdoor Unit Fan is over 5A Current Error Slave2 Outdoor Unit Fan is over 5A Slave2 Outdoor Unit Fan Over Current Error Slave3 Outdoor Unit Fan Over...
  • Page 88 Test Run Display Title Cause of Error Failing to receive Slave Unit signal at main PCB of Communication Error Between Master outdoor unit Master Outdoor Unit and Other Outdoor Unit Failing to receive master and other Slave Unit signal at Communication Error Between Slave1 Outdoor Unit and Other main PCB of Slave1 outdoor unit...
  • Page 89 Test Run Display Title Cause of Error Master Outdoor Unit Subcooling Master Outdoor Unit Subcooling Inlet Temperature Inlet Temperature Sensor Error Sensor open or short Slave1 Outdoor Unit Subcooling Slave1 Outdoor Unit Subcooling Inlet Temperature Inlet Temperature Sensor Error Sensor open or short 1 1 4 Slave2 Outdoor Unit Subcooling Slave2 Outdoor Unit Subcooling Inlet Temperature...
  • Page 90 Test Run Display Title Cause of Error Master Outdoor Unit Fan PCB Master Outdoor Unit Fan PCB Heat Sink Temperature Heat Sink Temperature Sensor Sensor open or short Error Slave1 Outdoor Unit Fan PCB Slave1 Outdoor Unit Fan PCB Heat Sink Temperature Heat Sink Temperature Sensor Sensor open or short Error...

  • Page 91: Caution For Refrigerant Leak

    Caution For Refrigerant Leak Caution For Refrigerant Leak The installer and system specialist shall secure safety against leakage according to local regulations or standards. The following standards may be applicable if local regulations are not available. Introduction Though the R410A refrigerant is harmless and incombustible itself , the room to equip the air conditioner should be large to such an extent that the refrigerant gas will not exceed the limiting concentration even if the refrigerant gas leaks in the room.
  • Page 92 Caution For Refrigerant Leak (3) With partition and without opening which serve as passage of air to adjoining room Outdoor unit Indoor unit Smallest room I Calculate refrigerant concentration Total amount of replenished In case the result of calculation exceeds refrigerant in refrigerant facility (kg) Refrigerant concentration the limiting concentration, perform the...

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