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LG MULTI V IV PRO ARUN080LLH4 Installation Manual
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LG MULTI V IV PRO ARUN080LLH4 Installation Manual

LG MULTI V IV PRO ARUN080LLH4 Installation Manual

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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.
P/NO : MFL68165207
www.lg.com

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Summary of Contents for LG MULTI V IV PRO ARUN080LLH4

  • 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. www.lg.com P/NO : MFL68165207...
  • Page 2 TIPS FOR SAVING ENERGY TIPS FOR SAVING ENERGY Here are some tips that will help you to minimize the power consumption when you use the air conditioner. You can use your air conditioner more efficiently by referring to the instructions given below: •...
  • Page 3 IMPORTANT SAFETY INSTRUCTIONS IMPORTANT SAFETY INSTRUCTIONS READ ALL INSTRUCTIONS BEFORE USING THE APPLIANCE. Always comply with the following precautions to avoid dangerous situations and ensure peak performance of your product WARNING It can result in serious injury or death when the directions are ignored CAUTION It can result in minor injury or product damage when the directions are ignored WARNING...
  • Page 4 IMPORTANT SAFETY INSTRUCTIONS • When installing and moving the air conditioner to another site, do not charge it with a different refrigerant from the refrigerant specified on the unit. - If a different refrigerant or air is mixed with the original refrigerant, the refrigerant cycle may mal- function and the unit may be damaged.
  • Page 5 IMPORTANT SAFETY INSTRUCTIONS CAUTION Installation • Always check for gas (refrigerant) leakage after installation or repair of product. - Low refrigerant levels may cause failure of product. • Do not install the product where the noise or hot air from the outdoor unit could damage the neighborhoods. - It may cause a problem for your neighbors.
  • Page 6 IMPORTANT SAFETY INSTRUCTIONS • Safely dispose of the packing materials. - Packing materials, such as nails and other metal or wooden parts, may cause stabs or other injuries. - Tear apart and throw away plastic packaging bags so that children may not play with them. If children play with a plastic bag which was not torn apart, they face the risk of suffocation.
  • Page 7 TABLE OF CONTENTS TABLE OF CONTENTS Refrigerant piping system TIPS FOR SAVING EN- Pipe Connection Method between out- ERGY door unit/indoor unit Refrigerant charging IMPORTANT SAFETY IN- Distribution Method STRUCTIONS Branch pipe Fitting Leak Test and Vacuum drying INSTALLATION Vacuum Mode PROCESS Heat insulation of refrigerant piping ELECTRICAL WIRING...
  • Page 8 INSTALLATION PROCESS INSTALLATION PROCESS Indicate clearly who will be responsible for switch setting. Determination of division work Preparation of contract drawings Make connection clearly between outdoor, indoor, remote controller and option. Take account of gradient The foundation must be level even Sleeve and insert work Outdoor unit foundation work of drain piping...
  • Page 9 OUTDOOR UNITS INFORMATION OUTDOOR UNITS INFORMATION CAUTION n Combination Ratio (50~130%) Notes : * We can guarantee the operation only within 130% Combination. If you want to connect more than 130% combination, please contact us and dis- cuss the requirement like below. •...
  • Page 10 OUTDOOR UNITS INFORMATION Unit 2 Outdoor Unit System(HP) Combination Unit ARUN220LLH4 ARUN240LLH4 ARUN260LLH4 ARUN280LLH4 Model ARUN120LLH4 ARUN140LLH4 ARUN160LLH4 ARUN160LLH4 Independent Unit ARUN100LLH4 ARUN100LLH4 ARUN100LLH4 ARUN120LLH4 Refrigerant Precharged (6.6) + (5.0) (6.0) + (5.0) (7.6) + (5.0) (7.6) + (6.6) Amount (14.6) + (11.0) (13.2) + (11.0) (16.8) + (11.0)
  • Page 11 OUTDOOR UNITS INFORMATION Unit 3 Outdoor Unit System(HP) Combination Unit ARUN380LLH4 ARUN400LLH4 ARUN420LLH4 ARUN160LLH4 ARUN160LLH4 ARUN160LLH4 Model Independent Unit ARUN120LLH4 ARUN120LLH4 ARUN140LLH4 ARUN100LLH4 ARUN120LLH4 ARUN120LLH4 (7.6) + (6.6) + (5.0) (7.6) + (6.6) x 2 (7.6) + (6.0) + (6.6) Refrigerant Precharged Amount (16.8) + (14.6) + (11.0)
  • Page 12 ENVIRONMENT-FRIENDLY ALTERNATIVE REFRIGERANT R410A ENVIRONMENT-FRIENDLY ALTERNATIVE RE- FRIGERANT R410A The refrigerant R410A has the property of higher operating pressure in comparison with R22. Therefore, all materials have the characteristics of higher resisting pressure than R22 ones and this characteristic should be also considered during the installation. R410A is an azeotrope of R32 and R125 mixed at 50:50, so the ozone depletion potential (ODP) of R410A is 0.
  • Page 13 SELECT THE BEST LOCATION SELECT THE BEST LOCATION Select space for installing outdoor unit, which will meet the following conditions: • No direct thermal radiation from other heat sources • No possibility of annoying neighbors by noise from unit • No exposition to strong wind •...
  • Page 14 INSTALLATION SPACE INSTALLATION SPACE Individual Installation During the installation of the unit, consider service, inlet, and outlet and acquire the minimum space as shown in the figures below. Case 1 Case 2 Category Installation Space (10 mm≤Side Space≤49 mm) (Side Space≥49 mm) A≥10 A≥50 B≥300...
  • Page 15 INSTALLATION SPACE Case 1 Case 2 Category Installation Space (10 mm≤Side Space≤49 mm) (Side Space≥49 mm) Front A≥10 A≥50 B≥500 B≥500 C≥10 C≥50 D≥500 D≥500 E≥20 E≥100 F≥900 F≥600 Front Front A≥10 A≥50 B≥500 B≥500 C≥10 C≥50 Rear to D≥500 D≥500 Rear E≥20...
  • Page 16 LIFTING METHOD LIFTING METHOD • When carrying the suspended, unit 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 • Install at places where it can endure the weight and vibration/noise of the outdoor unit. • The outdoor unit supports at the bottom shall have width of at least 100 mm under the Unit’s legs before being fixed. •...
  • 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. Cut the pipes and the cable - Use the accessory piping kit or the pipes pur- Copper Slanted Uneven Rough tube chased 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 Closing shutoff valve Remove the cap and turn the valve clockwise with the hexagon wrench. Securely tighten the valve until the shaft contacts the main body seal. Make sure to tighten the cap securely. * For the tightening torque, refer to the table on the below. Tightening torque Tightening torque N m(Turn clockwise to close) Shutoff...
  • Page 22 INSTALLATION Plumbing materials and storage methods Pipe must be able to obtain the specified thickness and should be used with low impurities. Also when handling storage, pipe must be careful to prevent a fracture, deformity and wound. Should not be mixed with contaminations such as dust, moisture. Refrigerant piping on three principles Drying Cleanliness...
  • Page 23 INSTALLATION Nitrogen substitution method Welding, as when heating without nitrogen substitution a large amount of the oxide film is formed on the internal piping. The oxide film is a caused by clogging EEV, Capillary, oil hole of accumulator and suction hole of oil pump in compressor.
  • Page 24 REFRIGERANT PIPING INSTALLATION REFRIGERANT PIPING INSTALLATION Precautions on Pipe connection / Valve operation Pipe connection is done by connecting from the end of the pipe to the branching pipes, and the refrigerant pipe coming out of the outdoor unit is divided at the end to connect to each indoor unit.
  • Page 25 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT - Pipe connections can be done on the front side or on the side according to the installation envi- ronments. - Be sure to let 0.2 kgf/cm Nitrogen flow in the pipe when welding.
  • Page 26 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT Remove leakage prevention cap • Remove the leakage prevention cap attached to the outdoor unit service valve before pipe work. • Proceed the leakage prevention cap removal as follows: - Verify whether the liquid/gas pipes are locked. - Extract remaining refrigerant or air inside using the service port.
  • Page 27 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT Method of drawing out pipes on the bottom side - Drawing out common pipe through side panel Liquid pipe Gas pipe Remove only liquid/gas pipe Knock out...
  • Page 28 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT Refrigerant piping system 1 Outdoor Unit Y branch method Ⓐ : Outdoor Unit Ⓑ : 1st branch (Y branch) Ⓒ : Indoor Units L165 m l 40 m (90 m : Conditional application) h 30 m Combination of Y branch/header Method Ⓐ...
  • Page 29 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT Series Outdoor Units (2 Units ~ 3 Units) Y branch method Slave2 Slave1 Ⓐ : Outdoor Unit Master Ⓑ : 1st branch (Y branch) 10 m or Ⓒ : Indoor Units less ODU Capacity Ⓓ...
  • Page 30 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT Pipe Connection Method between outdoor unit/indoor unit Slave1 Master Slave2 Indoor Unit 1st branch Refrigerant pipe diameter from outdoor unit to first branch l 40 m h 30 m h See Table 2 A : Refrigerant pipe diameter from outdoor unit to first branch E : Refrigerant pipe diameter for outdoor unit capacity (Slave 1+ Slave 2) F : Refrigerant pipe diameter for outdoor unit capacity (Slave 2)
  • Page 31 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT Refrigerant pipe diameter from branch to branch (B,C,D) Downward Indoor Unit Liquid pipe [mm(inch)] Gas pipe [mm(inch)] total capacity [kW(Btu/h)] ≤ 5.6(19,100) Ø 6.35(1/4) Ø 12.7(1/2) < 16.0(54,600) Ø 9.52(3/8) Ø 15.88(5/8) ≤ 22.4(76,400) Ø...
  • Page 32 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT (Table 2) Refrigerant pipe diameter from outdoor unit to first branch. (A) Increased Pipe Diameter Upward Standard Pipe Outdoor unit When equivalent pipe length is 90 m When level difference is Diameter total capacity or more from ODU to farthest IDU 50 m or more Liquid pipe...
  • Page 33 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT (Table 4) Conditional Application • To satisfy below condition to make 40 m ~ 90 m of pipe length after first branch. Condition Example Diameter of pipes between Ø6.35 ’ Ø9.52, Ø9.52 ’ Ø12.7, first branch and the last branch Ø12.7 ’...
  • Page 34 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT Outdoor unit Connection WARNING • In case of pipe diameter B connected after first branch is bigger than the main pipe diame- ter A, B should be of the same size with A. Ex) In case indoor unit combination ratio 120% is connected to 24HP(67.2 kW) outdoor unit.
  • Page 35 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT Pipe Connection Method/Precautions for Series connections between Outdoor units - Separate Y branch joints are needed for series connections between outdoor units. - Please refer to the below connection examples to install pipe connections between outdoor units.
  • Page 36 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT - The pipes between the outdoor units must maintain horizontal levelness or give an inclination to prevent a back flow toward the slave outdoor unit. Otherwise, the unit may not operate prop- erly. (Example 1) Toward indoor unit Toward indoor unit...
  • Page 37 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT - When connecting the pipes between the outdoor units, the accumulation of oil in the slave out- door unit should be avoided. Otherwise, the unit may not operate properly. (Example 1) Toward indoor unit Toward indoor unit (Example 2) Toward indoor unit...
  • Page 38 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT The amount of Refrigerant The calculation of the additional charge should take into account the length of pipe and CF(correc- tion Factor) value of indoor unit. Additional charge(kg) Total liquid pipe : Ø 25.4 mm x 0.480 (kg/m) Total liquid pipe : Ø...
  • Page 39 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT WARNING • Regulation for refrigerant leakage : the amount of refrigerant leakage should satisfy the following equation for human safety. Total amount of refrigerant in the system ≤ 0.44 (kg / m Volume of the room at which Indoor Unit of the least capacity is installed If the above equation can not be satisfied, then follow the following steps.
  • Page 40 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT Distribution Method Horizontal Distribution Slave Master Slave 3rd main pipe distribution Master Slave Master Main pipe Distribution Main pipe Distribution Vertical Distribution - Ensure that the branch pipes are attached vertically. Slave Master Slave Master The others...
  • Page 41 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT Branch pipe Fitting Y branch Ⓐ To Branch Piping or Indoor Unit Ⓑ To Outdoor Unit • Ensure that the branch pipes are attached horizontally or vertically (see the diagram below.) Horizontal Facing Facing plane downwards...
  • Page 42 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT • When the number of indoor units to be connected to the branch pipes is less than the number of branch pipes available for connection then cap pipes should be fitted to the surplus branches. Pinched pipe •...
  • Page 43 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT Y branch pipe [unit:mm] Models Gas pipe Liquid pipe I.D12.7 I.D12.7 I.D6.35 I.D.6.35 I.D9.52 I.D15.88 I.D15.88 I.D9.52 I.D.6.35 I.D15.88 ARBLN01621 I.D12.7 I.D.9.52 O.D9.52 I.D19.05 O.D15.88 I.D12.7 I.D22.2 I.D19.05 I.D15.88 I.D19.05 I.D12.7 I.D12.7 I.D9.52 I.D19.05 I.D25.4 I.D15.88...
  • Page 44 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT Header [unit:mm] Models Gas pipe Liquid pipe ID12.7 ID6.35 ID6.35 4 branch ID12.7 ID9.52 ID15.88 ID9.52 ARBL054 ID15.88 ID12.7 ID9.52 ID15.88 ID19.05 ID12.7 ID6.35 7 branch ID12.7 ID9.52 ID15.88 ARBL057 120 150 ID15.88 ID15.88 ID19.05 ID9.52...
  • Page 45 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT Leak Test and Vacuum drying Leak test Leak test should be made by pressurizing nitrogen gas to 3.8 MPa(38.7 kgf/cm ). If the pressure does not drop for 24 hours, the system passes the test. If the pressure drops, check where the nitrogen leaks.
  • Page 46 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT Vacuum Vacuum drying should be made from the service port provided on the outdoor unit’s service valve to the vacuum pump commonly used for liquid pipe, gas pipe and high/low pressure common pipe. (Make Vacuum from liquid pipe, gas pipe and high/low pressure common pipe with the service valve closed.) * Never perform air purging using refrigerant.
  • Page 47 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT 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 Master unit PCB DIP switch on : No.5 Select the mode using ‘▶’, ‘◀’...
  • Page 48 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT Heat insulation of refrigerant piping Be sure to give insulation work to refrigerant piping by covering liquid pipe and gas pipe sepa- rately 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 49 ELECTRICAL WIRING ELECTRICAL WIRING CAUTION - 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 electrical engineers do the electric work using special circuits in accordance with regulations and this installation manual.
  • Page 50 ELECTRICAL WIRING Outdoor Units Outdoor Units Master Slave1 Slave2 Master Slave1 Slave2 Indoor Indoor Indoor Indoor Unit Unit Unit Unit Remote Remote Remote Remote controller controller controller controller Outdoor Units Outdoor Units Master Slave1 Slave2 Master Slave1 Slave2 Indoor Indoor Indoor Indoor Unit...
  • Page 51 ELECTRICAL WIRING Control box and connecting position of wiring - Remove all of the screws at front panel and remove the panel by pulling it forward. - Connect communication cables between Master and Slave outdoor unit through the terminal block. - Connect communication cables between outdoor unit and indoor units through the terminal block.
  • Page 52 ELECTRICAL WIRING Communication and Power Cables Communication cable - Types : shielding cable - Cross section : 1.0~1.5 mm - Maximum allowable temperature: 60 °C - Maximum allowable cable length: under 1000 m Remote control cable - Types : 3-core cable Central control cable Product type Cable type...
  • Page 53 ELECTRICAL WIRING Wiring of main power supply and equipment capacity - Use a separate power supply for the Outdoor Unit and Indoor Unit. - Bear in mind ambient conditions (ambient temperature,direct sunlight, rain water,etc.) when proceeding with the wiring and connections. - The cable size is the minimum value for metal conduit wiring.
  • Page 54 ELECTRICAL WIRING Field Wiring Single outdoor unit Outdoor Power supply 3Ø 4-wire [Outdoor Unit] (Main Switch) R S T N Voltage range(V) Switch Frequency Outdoor Indoor Fuse Indoor 60 Hz 400 V 220 V Power supply 50 Hz 380-415 V 220-240 V (1Ø...
  • Page 55 ELECTRICAL WIRING Series outdoor units When the power source is connected In series between the units. Outdoor Power supply (3Ø 4wires) [Master] [Slave1] [Slave2] (Main Switch) R S T N Switch Fuse Indoor Power supply (1Ø 2wires) Power cable (4 Wires Cable) Power cable (2 Wires Cable) Communication cable...
  • Page 56 ELECTRICAL WIRING WARNING • Indoor Unit ground wires are required for preventing electrical shock accident during current leakage, Communication disorder by noise effect and motor current leakage (without connec- tion to pipe). • Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.
  • Page 57 ELECTRICAL WIRING Example) Connection of transmission wire [BUS type] [STAR type] - Connection of communication cable must be - Abnormal operation can be caused by com- installed like below figure between indoor munication defect, when connection of unit to outdoor unit. communication cable is installed like below figure(STAR type).
  • Page 58 ELECTRICAL WIRING Example) Connection of power and communication cable (UX5) Left Side Right Side Main power terminal block Main power terminal block Ground wire Ground wire Power/ Power/ Ground cable Ground cable Over Over 50 mm 50 mm gap Communication Communication cable cable...
  • Page 59 ELECTRICAL WIRING Example) Connection of power and communication cable (UX6) Left Side Right Side Main power Main power terminal block terminal block Ground wire Ground wire Power/ Power/ Ground cable Ground cable Over Over 50 mm 50 mm gap Communication Communication cable cable...
  • Page 60 ELECTRICAL WIRING Example) Installation of IO Module Installation Method 1. Separate front panel from outdoor unit. 2. Separate front cover of control box. 3. Assemble the IO Module with screws(12 mm*2EA) on designated location. 4. Connect the connection wires according to the instructions. (Please refer to Setting and Using Method which is included in IO Module Installation Manual) Location of IO Module...
  • Page 61 ELECTRICAL WIRING Checking the setting of outdoor units Checking according to dip switch setting - You can check the setting values of the Master outdoor unit from the 7 segment LED. The dip switch setting should be changed when the power is OFF. Checking the initial display The number is sequentially appeared at the 7 segment in 5 seconds after applying the power.
  • Page 62 ELECTRICAL WIRING 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 cables connected to CEN.A and CEN.B terminal should be connected to central control of Outdoor Unit with care for their polarity (A-A, B-B ).
  • Page 63 ELECTRICAL WIRING Automatic Addressing The address of indoor units would be set by Automatic Addressing - Wait for 3 minutes after supplying power. (Master and Slave outdoor units, indoor units) - Press RED button of the outdoor units for 5 seconds. (SW01C) - A “88”...
  • Page 64 ELECTRICAL WIRING The Procedure of Automatic Addressing Power On Waiting 3 minutes Press RED Button for 5 sec. (SW01C) Automatic addressing start 7-segment LED = 88 Don’t press RED Button (SW01C) • Automatic addressing setting end Numbers of indoor unit connection set whose addressing is completed are indicated for 30 seconds Waiting about 2~7 minutes on 7-segment LED after completing setting...
  • Page 65 ELECTRICAL WIRING Setting the function Select the mode/function/option/value using ‘▶’, ‘◀’ Button and confirm that using the ‘●’ but- ton after dip switch No.5 is turned on. DIP-SW01 7 - Segment SW04C ( : cancel) SW03C ( : forward) SW02C ( : backward) SW01C ( : confirm) SW01D (reset)
  • Page 66 ELECTRICAL WIRING Cool & Heat selector Mode setting method Master unit PCB DIP switch on : No.5 Select the mode using ‘▶’, ‘◀’ Button : “Func” Push the ‘●’ button Select the Function using ‘▶’, ‘◀’ Button : “Fn1” Push the ‘●’ button Select the Option using ‘▶’, ‘◀’...
  • Page 67 ELECTRICAL WIRING Static pressure compensation mode This function secures the air flow rate of ODU, in case static pressure has been applied like using duct at fan discharge of ODU. Static pressure compensation mode setting method Master unit PCB DIP switch on : No.5 Select the mode using ‘▶’, ‘◀’...
  • Page 68 ELECTRICAL WIRING Night Low Noise 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. Night low noise function setting method Master unit PCB DIP switch on : No.5 Select the mode using ‘▶’, ‘◀’...
  • Page 69 ELECTRICAL WIRING Overall defrost mode Mode setting method Master unit PCB DIP switch on : No.5 Select the mode using ‘▶’, ‘◀’ Button : “Func” Push the ‘●’ button Select the Function using ‘▶’, ‘◀’ Button : “Fn4” Push the ‘●’ button Select the Option using ‘▶’, ‘◀’...
  • Page 70 ELECTRICAL WIRING Setting the ODU address Mode setting method Master unit PCB DIP switch on : No.5 Select the mode using ‘▶’, ‘◀’ Button : “Func” Push the ‘●’ button Select the Function using ‘▶’, ‘◀’ Button : “Fn5” Push the ‘●’ button Select the Option using ‘▶’, ‘◀’...
  • Page 71 ELECTRICAL WIRING Snow removal & rapid defrost Mode setting method Master unit PCB DIP switch on : No.5 Select the mode using ‘▶’, ‘◀’ Button : “Func” Push the ‘●’ button Select the Function using ‘▶’, ‘◀’ Button : “Fn6” Push the ‘●’ button Select the Option using ‘▶’, ‘◀’...
  • Page 72 ELECTRICAL WIRING Target pressure adjusting Mode setting method Master unit PCB DIP switch on : No.5 Select the mode using ‘▶’, ‘◀’ Button : “Func” Push the ‘●’ button Select the Function using ‘▶’, ‘◀’ Button : “Fn8” Push the ‘●’ button Select the Option using ‘▶’, ‘◀’...
  • Page 73 ELECTRICAL WIRING High Efficiency cooling mode According to the change of outdoor temperature, switch the target pressure for the high energy efficiency. Mode setting method Master unit PCB DIP switch on : No.5 Select the mode using ‘▶’, ‘◀’ Button : “Func”...
  • Page 74 ELECTRICAL WIRING Auto dust removal mode Reversing rotation of the fan motor, it’s possible to remove dust automatically. Mode setting method Master unit PCB DIP switch on : No.5 Select the mode using ‘▶’, ‘◀’ Button : “Func” Push the ‘●’ button Select the Function using ‘▶’, ‘◀’...
  • Page 75 ELECTRICAL WIRING Smart Load Control According to the difference of indoor temperature and setting temperature, switch the target pressure to increase efficiency. Mode setting method Master unit PCB DIP switch on : No.5 Select the mode using ‘▶’, ‘◀’ Button : “Func”...
  • Page 76 ELECTRICAL WIRING Comfort Cooling Function In the cooling mode, this optional function enables the IDU to operate continuously with out thermo off to reduce ODU power consumption. Continuous cooling function setting method Master unit PCB DIP switch on : No.5 Select the mode using ‘▶’, ‘◀’...
  • Page 77 ELECTRICAL WIRING Self-Diagnosis Function Error Indicator - This function indicates types of failure in self-diagnosis and occurrence of failure for air condi- tion. - 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 78 ELECTRICAL WIRING Display Title Cause of Error Master Outdoor Unit Inverter Com- DC charging is not performed at Master Outdoor pressor DC link Low Voltage Unit after starting relay turn on. Slave1 Outdoor Unit Inverter Com- DC charging is not performed at Slave1 Outdoor pressor DC link Low Voltage Unit after starting relay turn on.
  • Page 79 ELECTRICAL WIRING Display Title Cause of Error Master Outdoor Unit Inverter Com- Master Outdoor Unit Inverter Compressor1 High pressor1 High Discharge Tempera- Discharge Temperature ture Slave1 Outdoor Unit Inverter Com- Slave1 Outdoor Unit Inverter Compressor1 High pressor1 High Discharge Tempera- Discharge Temperature ture Slave2 Outdoor Unit Inverter Com-...
  • Page 80 ELECTRICAL WIRING Display Title Cause of Error Master Outdoor Unit Inverter Com- Master Outdoor Unit Inverter Compressor CT Sen- pressor CT Sensor Fault sor open or short Slave1 Outdoor Unit Inverter Com- Slave1 Outdoor Unit Inverter Compressor CT Sen- pressor CT Sensor Fault sor open or short Slave2 Outdoor Unit Inverter Com- Slave2 Outdoor Unit Inverter Compressor CT Sen-...
  • Page 81 ELECTRICAL WIRING Display Title Cause of Error Master Outdoor Unit Heat Ex- Master Outdoor Unit Heat Exchanger Temperature changer Temperature Sensor (Front Sensor(Front side) open or short side) Fault Slave1 Outdoor Unit Heat Ex- Slave1 Outdoor Unit Heat Exchanger Temperature changer Temperature Sensor (Front Sensor (Front side) open or short side) Fault...
  • Page 82 ELECTRICAL WIRING Display Title Cause of Error Excessive connection of indoor units compared to 5 1 1 Excessive capacity of indoor units capacity of Outdoor Unit Communication error : inverter PCB Failing to receive inverter signal at main PCB of →...
  • Page 83 ELECTRICAL WIRING Display Title Cause of Error Master Outdoor Unit Inverter Master Outdoor Unit Inverter Heatsink Tempera- Heatsink Temperature Sensor Fault ture Sensor open or short Slave1 Outdoor Unit Inverter Slave1 Outdoor Unit Inverter Heatsink Tempera- Heatsink Temperature Sensor Fault ture Sensor open or short Slave2 Outdoor Unit Inverter Slave2 Outdoor Unit Inverter Heatsink Tempera-...
  • Page 84 ELECTRICAL WIRING Display Title Cause of Error Master Outdoor Unit Fan Over Cur- Master Outdoor Unit Fan Current is over 5A rent Error Slave1 Outdoor Unit Fan Over Cur- Slave1 Outdoor Unit Fan Current is over 5A rent Error Slave2 Outdoor Unit Fan Over Cur- Slave2 Outdoor Unit Fan Current is over 5A rent Error Master Outdoor Unit Fan Start Fail-...
  • Page 85 ELECTRICAL WIRING Display Title Cause of Error Communication Error Between Failing to receive Slave Unit signal at main PCB of Master Outdoor Unit and Other Master Outdoor Unit Outdoor Unit Communication Error Between Failing to receive Master and other Slave Unit sig- 1 0 4 Slave1 Outdoor Unit and Other nal at main PCB of Slave1 Outdoor Unit...
  • Page 86 ELECTRICAL WIRING Display Title Cause of Error Master Outdoor Unit Subcooling Master Outdoor Unit Subcooling Outlet Tempera- Outlet Temperature Sensor Error ture Sensor Error Slave1 Outdoor Unit Subcooling Slave1 Outdoor Unit Subcooling Outlet Tempera- 1 1 5 Outlet Temperature Sensor Error ture Sensor Error Slave2 Outdoor Unit Subcooling Slave2 Outdoor Unit Subcooling Outlet Tempera-...
  • Page 87 ELECTRICAL WIRING Display Title Cause of Error Master outdoor unit External Master Outdoor Unit Main Board Main-Sub Board Main-Sub Micom commu- Micom communication failed nication Error Slave1 outdoor unit External Slave1 Outdoor Unit Main Board Main-Sub Micom 1 8 2 Board Main-Sub Micom commu- communication failed nication Error...
  • Page 88 CAUTION FOR REFRIGERANT LEAK CAUTION FOR REFRIGERANT LEAK The installer and system specialist shall secure safety against leakage according to local regula- tions 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 89 CAUTION FOR REFRIGERANT LEAK - With partition and without opening which serve as passage of air to adjoining room Outdoor unit Indoor unit Smallest room Calculate refrigerant concentration Total amount of replenished refrigerant in refrigerant facility (kg) In case the result of calculation exceeds = Refrigerant concentration the limiting concentration, perform the Capacity of smallest room where...
  • Page 90 INSTALLATION GUIDE AT THE SEASIDE INSTALLATION GUIDE AT THE SEASIDE In case, to install the outdoor unit on the sea- CAUTION side, set up a windbreak not to be exposed to the sea wind. • Air conditioners should not be installed in areas where corrosive gases, such as acid or alkaline gas, are produced.

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