LG Multi V ARUB Series Installation Manual

LG Multi V ARUB Series Installation Manual

Heat recovery outdoor unit
Hide thumbs Also See for Multi V ARUB Series:
Heat Recovery Outdoor Unit
INSTALLATION MANUAL
MODELS: ARUB Series
website http://www.lgservice.com
System
IMPORTANT
• 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.
LG
R410A
Table of Contents
loading

Summary of Contents for LG Multi V ARUB Series

  • Page 1 website http://www.lgservice.com System Heat Recovery Outdoor Unit R410A INSTALLATION MANUAL MODELS: ARUB Series IMPORTANT • 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.
  • Page 2: Table Of Contents

    ARUB Series Outdoor Unit Installation Manual TABLE OF CONTENTS Safety Precautions........3 Installation Process ......11 Outdoor Unit Information ....13 Select the Best Location ....14 Installation Space .......16 Lifting method ........20 Installation ...........21 Refrigerant piping installation ...26 Electrical Wiring........43 HR unit PCB.........53 Main unit and Sub unit PCB....63 Test Run..........70 Caution For Refrigerant Leak ....79...
  • 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 For re-installation of the installed product, Do not install, remove, or re-install the unit always contact a dealer or an Authorized by yourself (customer). Service Center. • There is risk of fire, electric shock, explosion, or • There is risk of fire, electric shock, explosion, or injury.
  • Page 5 Safety Precautions Ventilate before operating air conditioner Securely install the cover of control box and when gas leaked out. the panel. • It may cause explosion, fire, and burn. • If the cover and panel are not installed securely, dust or water may enter the outdoor unit and fire or electric shock may result.
  • Page 6 Safety Precautions I Operation Do not damage or use an unspecified power Use a dedicated outlet for this appliance. cord. • There is risk of fire, electric shock, explosion, or • There is risk of fire or electrical shock. injury. Be cautious that water could not enter the Do not touch the power switch with wet product.
  • Page 7 Safety Precautions Do not open the inlet grill of the product during operation. (Do not touch the electrostatic filter, if the unit is so equipped.) • There is risk of physical injury, electric shock, or product failure. I Installation Always check for gas (refrigerant) leakage Do not install the product where the noise or after installation or repair of product.
  • Page 8 Safety Precautions Keep the unit away from children. The heat When installting the unit in a hospital, com- exchanger is very sharp. munication station, or similar place, provide sufficient protection against noise. • It can cause the injury, such as cutting the finger. •...
  • Page 9 Safety Precautions Make the connections securely so that the Be sure the installation area does not deteri- outside force of the cable may not be applied orate with age. to the terminals. • Inadequate connection and fastening may gen- • If the base collapses, the air conditioner could erate heat and cause a fire.
  • Page 10 Safety Precautions Do not touch any of the refrigerant piping Do not operate the air conditioner with the during and after operation. panels or guards removed. • It can cause a burn or frostbite. • Rotating, hot, or high-voltage parts can cause injuries.
  • Page 11: 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 12 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 13: Outdoor Unit Information

    Outdoor Units Information Outdoor Units Information CAUTION: A ratio of the connectable Indoor Units with the Outdoor: Within 50 ~ 130% A ratio of the running Indoor Units with the Outdoor: Within 10 ~ 100% (A combinated operation over 100% causes to reduce the total capacity.) Power Supply: Outdoor Unit (3Ø, 380 ~ 415V, 50Hz) I Heat Recovery System Unit...
  • Page 14: 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 15 Installation Space 100 more 100 more 100 more (Serviceing space) (Serviceing space) (Serviceing space) 300more 300more (NOTICE 2) (Servicing space) (Servicing space) 100 more 100 more 100 more (Serviceing space) (Serviceing space) (Serviceing space) Inspection door(NOTICE 1) (servicing space) 300more 450more (NOTICE 2) (Servicing space)
  • Page 16: 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 900 mm should be provided, the same as at the front. 250 mm or more Rear Side 900 mm or more (Control box is of a open/close type)
  • Page 17 Installation Space I When unit is surrounded by walls 900 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 Front Side I When there is an obstruction above the unit 45°...
  • Page 18 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 Rear Side Rear Side...
  • Page 19 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 20: 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 21: Installation

    Installation Installation Location of anchor bolt I Individual installation I Example of collective installation I Installation foot (Location of anchor bolt) Installation Manual 21...
  • Page 22 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 23 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 24 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 25 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 "ISO Conditions with Mist" and confirmed that there is not any default.
  • Page 26: 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 27 Refrigerant piping installation When connecting the pipes from the front of Knock out the outdoor unit, Remove part (or part and part Transmission Line Hole Power Cable Hole When connecting the pipes from the side of the Pipe Hole outdoor unit, remove part (the whole "Knock out"...
  • Page 28 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 29 Refrigerant piping installation Installation Procedure 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 30 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 31 Refrigerant piping installation [ Reducers for indoor unit and HR unit ] 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 HR unit reducer...
  • Page 32 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 33 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 34 Refrigerant piping installation Refrigerant piping system Example : 3 outdoor units, 4 HR units and 11 indoor units Outdoor unit Y branch HR unit Sub 2 Indoor unit Sub 1 Y branch Main "a" "b" I Case1 ("a") : Maximum height is 15 m if you install with Y branch. I Case2 ("b") : Height is zero(0) m in HR unit serial connector.
  • Page 35 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 36 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 37 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) ARUB1208T1 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 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 Ø19.05 Ø15.88 Ø12.7 Ø9.52 Ø12.7 Ø15.88 Ø12.7 Ø6.35 Ø9.52 Ø12.7 ARBLB01620 Ø15.88 Ø9.52 ~ under 22.4kW (76kBtu/h) Ø9.52 Ø12.7 Ø6.35 Ø9.52 Ø12.7 Ø15.88 Ø22.2...
  • 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 installation manual.
  • Page 44 Electrical Wiring Outdoor units Outdoor units Main Sub1 Sub2 Main Sub1 Sub2 Indoor Indoor Indoor Indoor unit unit unit unit unit unit Remote Remote Remote Remote control control control control Outdoor units Outdoor units Main Sub1 Sub2 Main Sub1 Sub2 Indoor Indoor Indoor...
  • 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 transmission line between main and sub outdoor unit through the terminal block. - Connect transmission lines between outdoor unit and indoor/HR units through the terminal block.
  • Page 46 Electrical Wiring Transmission and Power Lines 1) Transmission cable • Types : shielding wire CVVS or CPEVS • Diameter : over 1.25mm • Insulation material : PVC • Maximum allowable temperature: 60°C • Maximum allowable line length: under 220m 2) Remote control cable •...
  • Page 47 Electrical Wiring N Wiring of Main Power Supply and Equipment Capacity Outdoor unit (3Ø, 380 ~415V, 50Hz ) Indoor unit (1Ø, 220V, 50Hz) 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. 3.
  • Page 48 Electrical Wiring Notes: 9. RLA is measured during each individual compressor test con- dition. 1. Voltage range 14.5/12.0 : RLA of (INV. Comp) / (Const. Comp.1) Voltage supplied to the unit terminals should be within the min- imum and maximum range 10.
  • Page 49 Electrical Wiring Precautions when laying power wiring Use round pressure terminals for connections to the power terminal block. Power wire Round pressure terminal When none are available, follow the instructions below. • Do not connect wiring of different thicknesses to the power terminal block. (Slack in the power wiring may cause abnormal heat.) •...
  • Page 50 Electrical Wiring N Example Connection of Transmission Cable 1 Outdoor Unit 3 phase 4 wires power line Transmission line (3 line): wired remote control Single phase of power supply line Power supply switch Transmission line (2 shield line): between indoor unit and outdoor unit (Switch fuse) ❈...
  • Page 51 Electrical Wiring N Example Connection of Transmission Cable 2 Outdoor Units I When the power source is connected 3 phase 4 wires power line(R, S, T) In series between the units. Main Transmission line (3 line): wired remote control Single phase of power supply line Transmission line (2 shield line): Power supply switch between outdoor unit and outdoor unit...
  • Page 52 Electrical Wiring N Example Connection of Transmission Cable 3 Outdoor Units Main I When the power source is connected 3 phase 4 wires power line(R, S, T) In series between the units. Sub1 Transmission line (3 line): wired remote control Sub2 Single phase of power supply line Transmission line (2 shield line):...
  • Page 53: 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 54 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 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 Method for auto-addressing of valves. 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. Main Unit PCB 1) Auto addressing for indoor unit •...
  • 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 for addressing of indoor and HR Unit 1) Flow chart for Auto addressing Turn HR unit , indoor unit and outdoor unit on in the order named. Wait for 3 minutes Press SW02M of the outdoor unit main PCB for 5 seconds '88' is displayed on outdoor unit main PCB and HRunit PCB...
  • Page 59 HR Unit PCB 2) Flow chart for Auto 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 3) Flow chart for Manual 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/W01M No.1 on. •...
  • Page 63: Main Unit And Sub Unit Pcb

    Main unit and Sub unit PCB Main unit and Sub unit PCB Main Unit PCB 7 Segments (Shows setting status) SW03M (DIP switch) Sub Unit PCB (Shows setting status) SW03M (DIP switch) Installation Manual 63...
  • Page 64 Main unit and Sub unit 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 and those of the sub outdoor unit from the LED. The dip switch setting should be changed when the power is OFF. 2.
  • Page 65 Main unit and Sub unit PCB I Setting the DIP switch (SW03M) • Set the dip switch with the power turned off. If you change the setting when the power is on, the changed setting is not applied immediately. The changed setting is applied at the moment that the power is on.
  • Page 66 Main unit and Sub unit PCB 7) Forced oil collecting operation With dip switch setting as left side, push data button for 5 data address sec. Oil collecting operation is enabled after 10 minutes 5sec running of comp. 8) Backup operation 1 : In case of Inverter compressor damaged. Setting before applying the power Set at the unit of the inverter(constant speed comp.1) failure...
  • Page 67 Main unit and Sub unit PCB 2. Settings of sub outdoor unit 1) The sequence of sub unit : 1 sub unit At the 1 sub unit, set dip switch as the left side. Setting before applying the power. 2) The sequence of sub unit : 2 sub unit At the 2 sub unit, set dip switch...
  • Page 68 Main unit and Sub unit PCB Installation of Simple Central Controller Confirm the power of whole system(outdoor unit and indoor/HR units) is OFF, otherwise turn off. The transmission lines connected to C, D of simple central controller should be connected to C,D terminal port for central control of outdoor unit with care for their polarity (C ➔...
  • Page 69 Main unit and Sub unit PCB Group Number Setting of Indoor Units 1. Press Program button and Set/Clr button at the same time for 3 seconds. 2. The current group and the indoor unit numbers are indicated on the "88" of the wired remote control. 3.
  • 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 transmission 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 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 73 Test Run Display Title Cause of Error Current sensor of inverter compressor Current sensor of inverter compressor is open or short Discharge temperature sensor of Discharge temperature sensor of inverter compressor is open or short inverter compressor Low pressure sensor of main outdoor Low pressure sensor of main outdoor unit is open or short unit High pressure sensor of main outdoor unit is open or short...
  • Page 74 Test Run Display Title Cause of Error Discharge temperature of constant System is off by excessive increase of discharge tempera- ture of constant speed compressor 1 of sub1 outdoor unit speed compressor 1 of sub1 outdoor unit Discharge temperature of constant System is off by excessive increase of discharge tempera- ture of constant speed compressor 2 of sub1 outdoor unit speed compressor 2 of sub1 outdoor...
  • Page 75 Test Run Display Title Cause of Error Temperature sensor of rear-side heat Temperature sensor of rear-side heat exchanger of sub1 unit exchanger of sub1 outdoor unit is open or short Liquid pipe temperature sensor of Liquid pipe temperature sensor of sub1 outdoor unit is open sub1 outdoor unit or short Subcooling inlet temperature sensor of...
  • Page 76 Test Run Display Title Cause of Error Voltage detection circuit of sub1 out- Voltage detection circuit of sub1 outdoor unit is out of order door unit Low/high voltage of sub2 outdoor unit Input voltage of sub2 outdoor unit is more than 487V or less than 270V Voltage detection circuit of sub2 out- Voltage detection circuit of sub2 outdoor unit is out of order...
  • Page 77 Test Run Display Title Cause of Error Inlet sensor of subcooler of HR unit 7 Inlet sensor of subcooler of HR unit 7 is open or short Outlet sensor of subcooler of HR unit 7 Outlet sensor of subcooler of HR unit 7 is open or short Transmission error: HR unit 7 ¡...
  • Page 78 Test Run Position of the LED01Y in inverter board Outdoor Unit...
  • Page 79: 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 80 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...
  • Page 81 P/No.: 3828A24002F Printed in Korea After reading this manual, keep it in a place easily accessible to the user for future reference.

Table of Contents