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Troubleshooting

TROUBLESHOOTING

Due to our policy of continuous product innovation, some specifications may change without notification.

©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.

Troubleshooting Using Error Codes

Refer to the table below and on the next page for error codes that are generated from the indoor and outdoor units. These codes are the

most common. Your particular system might generate additional codes not listed here. Please contact LG Support if you see these types of

errors and a simple power cycle has not corrected the issue.

Error Codes

• Indicate different types of unit failures, assists in self-diagnosis and to track the frequency of occurrence.
• Error codes are shown on the control board LEDs of indoor and outdoor units and the SIMs app. Also, check the wired remote controller

display first for error codes if present.

• If two or more errors occur simultaneously, the lower error code number is displayed first.
• After error is resolved, the error code does not display.

Decoding the Error Display

The first and second number on the LED indicates error number. Example: 21 = LED1 2x blink, LED2 1x blink.

Error Code Nomenclature Definitions

• MICOM: Non-volatile memory chip where unit setup information is stored.
• EEPROM: Non-volatile memory chip where device identification, size, and factory defined default component operating parameters are

stored.

Error Codes

Error

Code

Description

No. of Times Indoor Unit LEDs Blink

LED1 (Single Digit)

LED2 (Ten Digit)

1

Indoor unit room temperature sensor error

1X

-

2

Indoor unit inlet pipe sensor error

2X

-

3

Wired remote control error

3X

4

Float switch error (optional)

4X

-

5

Communication error between indoor unit and outdoor unit

5X

-

6

Indoor unit outlet pipe sensor error

6X

-

9

Indoor unit EEPROM error

9X

-

10 Indoor unit BLDC motor fan lock

--

1X

12 Indoor unit middle pipe sensor error

2X

1X

21 DC Peak (IPM Fault); Compressor DC voltage was too high

2X

1X

22 Current Transformer2 (CT2) error; Alternating current (AC) input too high

2X

2X

23 DC Link Low Volt

2X

3X

25 AC Low/High Volt

2X

5X

26 DC Comp Position Error (not providing rotation), Locking

2X

6X

27 PSC Fault; Current to inverter compressor between AC and DC converter circuit too high

2X

7X

28 Inverter compressor DC voltage is too high

2X

8X

29 Inverter compressor amperage is too high

2X

9X

31 Current-to-current transformer (CT) thermistor is too low

3X

1X

32 Inverter Compressor Discharge Pipe (D-Pipe) Overheat

3X

2X

40 CT Sensor Error; Thermistor is disconnected or shorted out

4X

-

41 D-Pipe Sensor INV is disconnected or shorted out

4X

1X

44 Outdoor Air Sensor is disconnected or shorted out

4X

4X

45 Middle thermistor of outdoor unit condenser coil is disconnected or shorted out

4X

5X

46 Outdoor unit suction line thermistor is disconnected or shorted out

4X

6X

48 Outdoor unit coil outlet (liquid line) thermistor is disconnected or shorted out

4X

8X

53 Communication failure from outdoor unit to indoor unit

5X

3X

60 Outdoor unit printed circuit board (PCB) EEPROM check sum error

6X

-

61 Outdoor unit condenser coil temperature is too high

6X

1X

62 Outdoor unit inverter compressor PCB heat sink temperature is too high

6X

2X

63 Condenser coil pipe thermistor temperature is too low

6X

3X

65 Heat sink thermistor has disconnected or has shorted out

6X

5X

67 Outdoor brushless direct current (BLDC) fan motor lock error

6X

7X

Table 24: Single Zone HEV2, HFV3, and HXV2 Wall Mounted Indoor Unit Error Codes.

Mega, Standard Efficiency, and Mega 115V Single Zone Wall Mounted Indoor

Unit Error Codes

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Summary of Contents for LS090HFV3

Page 1: ... LS120HEV2 LS180HEV2 LS240HEV2 Single Zone Standard Efficiency LS090HFV3 LS120HFV3 LS180HFV3 LS240HFV3 Single Zone Mega 115V LS090HXV2 LS120HXV2 SINGLE ZONE MEGA STANDARD EFFICIENCY AND MEGA 115V WALL MOUNTED INSTALLATION MANUAL ...

Page 2: ...of safety precautions begins on page 3 For more technical materials such as submittals engineering databooks and catalogs visit www lghvac com For continual product development LG Electronics U S A Inc reserves the right to change specifications without notice LG Electronics U S A Inc This document as well as all reports illustrations data information and other materials are the property of LG Ele...

Page 3: ...l enter the unit causing fire electric shock and physical injury or death Always check for system refrigerant leaks after the unit has been installed or serviced Exposure to high concentration levels of refrigerant gas will lead to illness or death Wear protective gloves when handling equipment Sharp edges will cause personal injury Dispose the packing materials safely Packing materials such as na...

Page 4: ...f HVAC equipment life to recover recycle reclaim or destroy R410A refrigerant according to applicable U S Environmental Protection Agency EPA rules Periodically check that the outdoor frame is not damaged There is a risk of equipment damage Install the unit in a safe location where nobody can step on or fall onto it Do not install the unit on a defective stand There is risk of unit and property da...

Page 5: ...nts Failure to carefully read and follow all instructions in this manual can result in personal injury or death All electric work must be performed by a licensed electrician and conform to local building codes or in the absence of local codes with the National Electrical Code and the instructions given in this manual If the power source capacity is inadequate or the electric work is not per formed...

Page 6: ...cause property damage product failure physical injury or death If gas leaks out ventilate the area before operating the unit If the unit is mounted in an enclosed low lying or poorly ventilated area and the system develops a refrigerant leak it will cause fire electric shock explosion physical injury or death To avoid physical injury use caution when cleaning or servicing the air conditioner Do no...

Page 7: ... Refrigerant System Engineering 31 33 Flaring and Brazing Procedures 34 35 Refrigerant Piping Connections 36 46 Installation Overview 36 Special Applications 37 Outdoor Unit Connections 38 Indoor Unit Connections 39 41 Outdoor Unit Drain Piping Indoor Unit Drain Hose 42 44 Bundling 44 Insulation 45 46 Electrical System Installation 47 57 Safety Guidelines 47 Connections and Specifications 48 52 Co...

Page 8: ...ndoor and Outdoor Units LS N 090 HEV 2 Type N Indoor Wall Mount Unit U Outdoor Heat Pump Unit No N or U System Family LA Art Cool Premier Gallery Mirror LS High Efficiency Wall Mount Standard Mega Generation or Revision 1 First 2 Second 3 Third 4 Fourth Nominal Capacity Nominal cooling capacity in Btu h 090 9 000 120 12 000 180 18 000 240 24 000 300 307 30 000 360 36 000 Indoor Outdoor Product HEV...

Page 9: ...ket One 1 Wireless Controller with Holder One 1 Connecting cable power and control Pipes vapor line and liquid line with insulation Insulated drain hose Additional drain hose Level Screwdriver Electrical lineman pliers Electric drill Hole saw Drill Flaring tool set Tubing cutter Tube pipe reamer Torque wrenches Allen wrench Gas leak detector Thermometer Measuring tape Multimeter Ammeter Required T...

Page 10: ...r Unit Type Qty Propeller 1 Motor Drive Brushless Digital Controlled Direct Airflow Rate Indoor Unit Max H M L CFM 459 353 264 148 459 353 264 148 689 512 459 371 689 512 459 371 Outdoor Unit Max CFM 953 953 1 730 1 730 Piping Liquid Line in OD 1 4 1 4 1 4 1 4 Vapor Line in OD 3 8 3 8 1 2 1 2 Condensation Line OD ID 27 32 5 8 27 32 5 8 27 32 5 8 27 32 5 8 Additional Refrigerant Charge oz ft 0 22 0...

Page 11: ... Digital Controlled Direct Airflow Rate Indoor Unit Max H M L CFM 459 353 264 148 459 353 264 148 689 512 459 371 689 512 459 371 Outdoor Unit Max CFM 953 953 1 730 1 730 Piping Liquid Line in OD 1 4 1 4 1 4 1 4 Vapor Line in OD 3 8 3 8 1 2 1 2 Condensation Line OD ID 27 32 5 8 27 32 5 8 27 32 5 8 27 32 5 8 Additional Refrigerant Charge oz ft 0 22 0 22 0 26 0 26 Pipe Length5 Minimum Maximum ft 9 8...

Page 12: ... or unshielded if shielded it must be grounded to the chassis of the outdoor unit only and must comply with applicable local and national codes For detailed electrical information please see the Electrical Data section 5 Piping lengths are equivalent System Model Number IDU ODU LS090HXV2 LSN090HXV2 LSU090HXV2 LS120HXV2 LSN120HXV2 LSU120HXV2 Cooling Capacity Min Rated Max Btu h 3 070 9 000 10 330 3...

Page 13: ...ated Load Amps FLA Full Load Amps Nominal Tons Unit Model No Hertz Voltage Voltage Range Min to Max MCA MOP Compressor Quantity Compressor Motor RLA Outdoor Fan Motor Indoor Fan Motor Cooling Heating W FLA W FLA 3 4 LS090HXV2 60 115 98 132 15 25 1 11 0 11 0 43 0 4 30 0 4 1 LS120HXV2 15 25 1 11 0 11 0 43 0 4 30 0 4 Nominal Tons Unit Model No Hertz Voltage Voltage Range Min to Max MCA MOP Compressor...

Page 14: ...heating mode Avoid placing the outdoor unit in a low lying area where water could accumulate If the outdoor unit is installed in a highly humid environment near an ocean lake etc ensure that the site is well ventilated and has a lot of natural light Example Install on a rooftop Do Not s Where it will be subjected to direct thermal radiation from other heat sources or an area that would expose the ...

Page 15: ...sulate any drain hoses to prevent the hose from freezing crack ing leaking and causing unsafe conditions from frozen condensate Tie Downs and Lightning Protection Tie Downs The strength of the roof must be checked before installing the outdoor units If the installation site is prone to high winds or earthquakes when installing on the wall or roof securely anchor the mounting base using a field pro...

Page 16: ...Windbreak must be more than 150 of the outdoor unit s height There must be 2 to 3 1 2 inches of clearance between the outdoor unit and the windbreaker for purposes of air flow Additional anti corrosion treatment will need to be applied to the outdoor unit at oceanside locations Ocean winds will cause corrosion particularly on the condenser and evaporator fins which in turn could cause product malf...

Page 17: ...3 Standard 20 12 Minimum 14 4 Case 4 Standard 12 24 Minimum 4 8 79 Case 5 Standard 24 12 Minimum 10 4 Table 7 Single Zone Mega Standard Efficiency and Mega 115V Outdoor Unit Service Access and Allowable Clearances Diagram Legend Do not place the unit where animals and or plants will be in the path of the warm air or where the warm air and or noise will disturb neighbors If the outdoor unit is inst...

Page 18: ...s to transport the outdoor unit the forklift arms must pass through the openings at the bottom If a crane is to suspend the outdoor unit it is required that two 2 ropes at least twenty three 23 feet in length be used Pass the ropes under the unit Pass the rope through the two 2 forklift slots each at the front and rear of the outdoor unit To prevent damage to the outdoor unit always lift the unit ...

Page 19: ...atform 1 Ensure that the concrete platform will not degrade easily and has enough structural strength to bear the weight of the unit 2 Include an H beam support Firmly attach the corners otherwise the support will bend 3 Use a hexagon nut 4 Use anti vibration material 5 Include enough space around the concrete foundation for con densate drainage 6 Seal all wiring and piping access holes to prevent...

Page 20: ...ling the unit near high frequency generators Figure 10 Indoor Unit Clearance Requirements Ceiling Clearance inches Indoor Unit Model s 8 LSN090HEV2 LSN120HEV2 LSN180HEV2 LSN240HEV2 LSN090HFV3 LSN120HFV3 LSN180HFV3 LSN240HFV3 LSN090HXV2 LSN120HXV2 Table 9 Indoor Unit Ceiling Clearance 4 100 Unit Inch mm 4 100 8 200 At least 6 1 2 feet from the floor The unit must not be installed where sulfuric aci...

Page 21: ...he centerline 3 Attach the installation plate to the wall following the measurements and marks Use the type A screws that are factory supplied with the plate If mounting the unit on a concrete wall use field supplied anchor bolts 4 Observe all rear piping clearances when drilling into the wall When choosing a location for the wall mount plate be sure to take into consideration routing of wiring fo...

Page 22: ...or Unit with the Bottom Cover On Bottom View Appear ances Will Vary Depending on Indoor Unit Model Figure 20 Steps to Removing the Bottom Cover To access the indoor unit piping port connections terminal block and to make the indoor unit installation procedure easier it is recommended that the bottom cover be removed first 1 Unsnap the bottom cover at its top left and right sides Location 1 2 Unsna...

Page 23: ...Bottom Cover Completely Removed from Indoor Unit Appearances Will Vary Depending on Indoor Unit Model Figure 23 Bottom Cover with Top and Middle Unsnapped Front View Appearances Will Vary Depending on Indoor Unit Model Inside of Indoor Unit Top Left Side of Bottom Cover Figure 24 Close Up of Bottom Cover Connections Appearances Will Vary Depending on Indoor Unit Model Hinge Top Snaps C Hooks Remov...

Page 24: ...on plate 2 Engage the hooks at the top of the indoor unit with the upper edge of the installation plate number of hooks depends on model type 3 Ensure the hooks are properly seated on the installation plate by shaking the indoor unit left and right Permanently secure the indoor unit to the wall ONLY AFTER all other tasks such as Refrigerant Piping Connections Drain Piping Connections Electrical Co...

Page 25: ...nd secure the indoor unit to the installation plate as detailed in Steps 5 and 6 in Mounting the Indoor Unit to the Installation Plate 1 To prepare the indoor unit for piping and electrical installation disengage bottom on indoor unit from installation plate by reversing Steps 6 5 and 4 from the previous procedure if those procedures have been performed 2 Unsnap the piping drain hose holder L brac...

Page 26: ...sts of one outdoor unit and one indoor unit One of the most critical elements of a single zone system is the refrigerant piping If the connection piping is not within allowable lim its there will be reliability performance noise and vibration issues The table below lists pipe length limits that must be followed in the design of a Single Zone Mega Standard Efficiency or Mega 115V refrigerant pipe s...

Page 27: ...aight Lengths H58 Temper Coils O60 Temper Table 12 ACR Rated Copper Tubing Material OD in 1 4 3 8 1 2 5 8 3 4 7 8 1 1 8 1 3 8 1 5 8 Material Rigid or Soft ACR Rated for R410A Rigid or Solid ACR Rated for R410A Min Bend Radius in 0 563 0 9375 1 5 2 25 3 0 3 0 3 5 4 0 4 5 Min Wall Thickness in 0 03 0 03 0 03 0 03 0 03 0 03 0 03 0 04 0 050 Table 13 ACR Copper Tubing Dimensions and Physical Characteri...

Page 28: ...pated expansion distance Do the same for the maximum pipe temperature 3 Calculate the difference in the two expansion distance values The result will be the anticipated change in pipe length General Example A system is installed and the design shows that there is a 100 foot straight segment of tubing between an indoor unit and the outdoor unit In heating this pipe transports hot gas vapor to the i...

Page 29: ...0 0 95 1 00 1 05 1 10 1 08 1 15 1 30 1 40 1 45 1 50 120 0 48 0 48 0 60 0 72 0 78 0 84 0 90 0 96 1 02 1 08 1 14 1 20 1 26 1 32 1 30 1 38 1 56 1 68 1 74 1 80 140 0 56 0 56 0 70 0 84 0 91 0 98 1 05 1 12 1 19 1 26 1 33 1 40 1 47 1 54 1 51 1 61 1 82 1 96 2 03 2 10 160 0 64 0 64 0 80 0 96 1 04 1 12 1 20 1 28 1 36 1 44 1 52 1 60 1 68 1 76 1 73 1 84 2 08 2 24 2 32 2 40 180 0 72 0 72 0 90 1 08 1 17 1 26 1 ...

Page 30: ...leaks shortages Refrigerant oil degradation Poor insulation of the compressor System does not operate properly Solutions Remove moisture from the piping Piping ends should remain capped until connections are complete Do not install piping on a rainy day Connect piping properly at the unit s side Remove caps only after the piping is cut the burrs are removed and after passing the piping through the...

Page 31: ...ulated into the total and segment equivalent piping lengths and compared to product design limitations In all cases materials must be suitable for the application and any applicable codes including but not limited to diameter and wall thick ness continuity per ACR standards Failure to do so will cause significant performance degradation Proper leak checks must be performed Using isolation valves d...

Page 32: ... used with shields between the hangers and insulation Field provided pipe supports must be designed to meet local codes If allowed by code use fiber straps or split ring hangers suspended from the ceiling on all thread rods fiber straps or split ring hangers can be used as long as they do not compress the pipe insulation Place a second layer of insulation over the pipe insulation jacket to prevent...

Page 33: ...ed at a level below the frost line Table 17 Utility Conduit Sizes 1 OD pipe diameter in inches Values in parenthesis indicate OD of pipe with insulation jacket 2 Diameter of pipe with insulation Thickness of pipe insulation is typical Actual required thickness will vary based on surrounding ambient conditions and must be calculated and specified by the design engineer 3 Insulation thickness value ...

Page 34: ...d connections as shown ALWAYS create a 45 flare when working with R410A 1 Cut the pipe to length Measure the distance between the indoor unit and the outdoor unit Cut the pipes a little longer than measured distance 2A Remove the burrs Completely remove all burrs from pipe ends When removing burrs point the end of the copper pipe down to avoid introducing foreign materials in the pipe 2B Slide the...

Page 35: ...es small orifices electronic expansion valves oil separators and heat exchangers that can easily become blocked Proper system operation depends on the installer using best practices and utmost care while assembling the piping system 2 Store pipe stock in a dry place keep stored pipe capped and clean 3 Blow clean all pipe sections with dry nitrogen prior to assembly 4 Always use a non oxidizing mat...

Page 36: ...Refer to the Connection Limitations section for specific length limitations in conjunction with outdoor unit and indoor unit positioning When proceeding with piping connections adhere to pipe support spacing lengths as shown in the General Refrigerant Piping System Information section Refer to the Pipe Supports section for information on using clamps and pipe support materials Always adhere to loc...

Page 37: ...ound the piping When the Outdoor Unit is Installed Above the Indoor Unit 1 Use a conduit piping set cover or bundle the separately insulated refrigerant piping and the communications connection power cable together up to the outdoor unit service valves 2 Make sure to include some slack in the wiring Wiring must be installed in upwards direction to prevent water from traveling into the control box ...

Page 38: ...figures below for liquid and gas vapor piping attachments onto the outdoor unit 4 Place a couple of drops of PVE refrigerant oil on outside of the flare before assembling Do not add any contaminants Tighten the flare nut initially by hand 5 Finish tightening the flare nut with a torque wrench until the wrench clicks Follow torque guidelines in the table below See figures for correct connection poi...

Page 39: ...nd bending the piping slowly downward first as shown then to the left or right pre chosen following installation guidelines and application needs as shown Secure piping with the piping holder Figure 46 Propping Open the Piping Drain Hose Holder L bracket Figure 47 Back of Indoor Unit Figure 48 Bending Piping at Rear of Indoor Unit To access the indoor unit piping port connections and to make the i...

Page 40: ...wer connections are complete before starting the piping connec tions 1 Insert drain hose on left feature will differ depending on model of indoor unit 2 Align the center of the refrigerant piping and corresponding con nection as shown on the next page 3 Place a couple of drops of refrigerant oil on outside of the flare before assembling Do not add any contaminants Tighten the flare nut initially b...

Page 41: ...ed Piping Pipe Size in O D Outside Diameter mm Torque ft lbs 1 4 6 35 13 0 18 0 3 8 9 52 24 6 30 4 1 2 12 7 39 8 47 7 5 8 15 88 45 4 59 3 3 4 19 05 71 5 87 5 Table 20 Torque Wrench Tightening Figure 52 Piping Installation When Piping is on the Right Side Piping Installation When Piping is on the Right Side HEV2 HFV3 and HXV2 See the Electrical System Installation section for information on how to ...

Page 42: ...sure testing and deep evacuation procedures of the refrigerant piping to be sure all refrigerant piping is properly installed Re check and retest as necessary Drain hose is routed from the indoor unit through the structure wall to the outdoor It must slope at an angle where it is higher at the indoor unit and lower toward the outdoor area thereby letting gravity push any condensation down and out ...

Page 43: ...e 2 inches Drain Hose Interior Wall Vinyl Chloride Drain Pipe Exterior Wall Accumulated drain water Tip of Drain Hose In Container Tip of Drain Hose Pointing Up Tip of Drain Hose In Water Air Kinks Water Leak Water Leak Ditch Less than 2 inch Gap Between Bottom of Drain Hose and Ground Water Leak No rainwater trap Drain Hose and Ground are Parallel Horizontal Drain Hose 6 1 2 feet Drain Hose Inser...

Page 44: ...her the two pipes using vinyl tape Make sure there are no gaps during the binding 3 Be sure the cutting line is placed upward 4 Wrap the rear piping section with narrow vinyl tape 5 Continue to wrap the indoor unit pipe as connected to the outdoor connection pipe 6 Using a wider vinyl tape bundle the piping and drain hose together Tape must be sufficient to cover the piping in order to fit into th...

Page 45: ...lene Propylene Diene Methylene EPDM insulation Inside the outdoor unit maximum pipe temperature is 248 F and minimum pipe temperature is 40 F For field insulation of refrigerant piping between outdoor units and indoor units consider the following pipe temperature ranges for an operating heat pump system Heating mode refrigerant temperature ranges Liquid 75 118 F High Pressure Vapor 95 220 F Coolin...

Page 46: ... ø3 8 inch ø1 2 inch 1 2 inches 1 2 inches 1 2 inches 1 2 inches Vapor pipe ø3 8 inch 1 2 inches 3 4 inches 3 4 inches 1 inch ø1 2 inch ø5 8 inch ø3 4 inch ø7 8 inch ø1 inch ø1 1 8 inches 3 4 inches ø1 1 4 inches 1 inch 1 inch ø1 3 8 inches ø1 1 2 inches ø1 3 4 inches Table 21 Minimum Refrigerant Pipe EPDM Insulation Wall Thickness Requirements 1 Do not insulate gas and liquid pipes together as th...

Page 47: ...ed earth ground will result in electric shock fire physical injury or death Consider ambient conditions temperature direct sunlight inclement weather etc when selecting installing and connecting the power wiring Properly ground the Single Zone outdoor and indoor unit Improperly connected ground wire can cause communication problems from electrical noise and motor current leakage Ground wiring must...

Page 48: ...w the instructions demonstrated in the figures below Never apply line voltage power to the communications cable terminal block If contact is made the PCBs will be damaged Always include some allowance in the wiring length when terminating Firmly attach the wiring or cable but provide some slack to facilitate removing the electrical panels while servicing and to prevent external forces from damagin...

Page 49: ...to avoid wiring malfunction and electrical shock which will cause physical injury or death Install appropriately sized breakers fuses overcurrent protection switches and wiring in accordance with local state and NEC regulation related to electrical equipment and wiring and following the instructions in this manual Generated overcurrent will include some amount of direct current Using an oversized ...

Page 50: ...16 1 8 13 16 GN YL Power Wiring Ground to Outdoor Unit Communication Connection Power Ground Cable From Outdoor Unit To Indoor Unit 13 16 GN YL GN YL Ground Yellow 7 16 1 8 For communication connection power wires between the Single Zone outdoor unit and the indoor unit for lengths up to 130 feet use a minimum 14 gauge four 4 conductor stranded shielded or unshielded wire If shielded the wire must...

Page 51: ...orp ELECTRICAL SYSTEM INSTALLATION Figure 80 Typical LS180HEV2 LS240HEV2 LS180HFV3 LS240HFV3 Power Communication System Diagram For Wiring Lengths Up to 130 Feet Figure 79 Typical LS090HEV2 LS120HEV2 LS090HFV3 LS120HFV3 Power Communication System Diagram For Wiring Lengths Up to 130 Feet Figure 81 Typical LS090 120HXV2 Power Communication System Diagram For Wiring Lengths Up to 130 Feet 208 230VAC...

Page 52: ...eutral N G Ground Power Flow L N Diagram is an example of communication and power cables when the wiring is GREATER THAN 130 feet Terminals may be labeled differently depending on the model Outdoor and Indoor Unit appearances may vary depending on the model Communication Flow Comm N 3 Communications GREATER THAN 130 feet Must Separate Communications and Ground G Cable from the Power 1 L1 and Neutr...

Page 53: ...nformation can connect to the Single Zone Mega Standard Efficiency and Mega 115V Wall Mount indoor units in one of two different ways 1 LG Wired Remote Extension Cable with Molex plug PZCWRC1 sold separately that connects to the CN REMO terminal on the indoor unit PCB 2 Field supplied controller cable that connects to the indoor unit terminal block must be at least UL2547 or UL1007 and at least FT...

Page 54: ... if applicable and raise the metal control cover 6 Using a JIS screwdriver connect the cable terminals to the terminal block Ensure wire color and terminal number of the indoor unit matches those of the outdoor unit Refer to the wiring diagram on the inside of the bottom cover 7 Choice of the cable path out of the indoor unit and to the outdoor unit depends on refrigerant piping drain hose install...

Page 55: ...nd cable must be longer than the other wires Secure the cable onto the control board using a cable tie Use a conduit to protect the cable refrigerant piping from the indoor unit to the outdoor unit Cable Installation When Piping is on the Right Side Connect the terminals to the terminal block Secure the cable onto the terminal block with the cable retainer Secure the refrigerant piping drain hose ...

Page 56: ...ry and or death Loose wires can cause the wiring to burn out damaging the outdoor unit 3 Confirm that electrical power supply capacity will be sufficient to run the unit Verify that a circuit breaker and service disconnect are installed See the Electrical table in the Product Data section for details on electrical requirements Per code install a main indoor breaker and an outdoor service discon ne...

Page 57: ... damaging the outdoor unit Secure wiring cables with cable ties Pay attention to the location connection of the ground cable Maintain a minimum of 1 4 inches of wire length from terminal block to cable bundle 7 When finished reattach the piping control box cover or con trol box cover depends on model to the outdoor unit with the screws Figure 100 HEV2 HFV3 and HXV2 Outdoor Unit Conduit Holes Acces...

Page 58: ...t Piping system must not be pressured to more than 550 psi Pressures greater than 550 psi will damage the piping system and cause unit malfunction Triple Leak Pressure Check Procedure 1 After the refrigerant piping installation is complete open the isolation ball valves if any that will have been included in the piping system 2 Verify that both the liquid and gas vapor suction line outdoor unit se...

Page 59: ...must be found Remove the bubble solution with a clean cloth repair the leak s and perform the leak pressure check again 9 After the system has been thoroughly tested and no leaks are found depressurize by loosening the charging hose connector at the nitro gen cylinder regulator When system pressure returns to normal completely disconnect the charging hose from the cylinder and release the nitrogen...

Page 60: ...nit Triple evacuation must be performed through the gas vapor suction Schrader port on the outdoor unit service port The deep evacuation procedure is required for Single Zone systems The triple evacuation procedure is a best practices recommendation for Single Zone systems For faster evacuation the Schrader core can be removed and an auxiliary service port can used Make sure to re install the orig...

Page 61: ...tes If the micron level DOES NOT stop rising there is a leak and the leak test must be performed again If the micron level DOES rise above 2 000 micron re open the manifold gauges and the vacuum pump valve and continue evacuation back down to 2 000 micron level If the micron level holds at 2 000 micron continue to step 4 4 Break vacuum with 50 psig nitrogen purge for an appropriate amount of time ...

Page 62: ...t Follow all guidelines when handling refrigerant Never inhale or handle refrigerant directly Doing so will cause bodily injury Table 22 Single Zone Mega Standard Efficiency and Mega 115V Refrigerant Piping System Additional Refrigerant Charge Refrigerant Trim Charge Finishing the Job Model Numbers Refrigerant Piping Length ft 16 4 24 6 32 8 41 0 49 2 65 6 82 0 98 4 114 8 131 2 147 6 164 0 Mega St...

Page 63: ...y service port is removed if used in the Evacuation procedure and the original Schrader core was re installed on the gas vapor suction service port 2 The service ports are a back seated type with a right hand thread Remove the service valve caps on both the gas vapor suction and the liquid service ports 3 Using an appropriately sized Allen wrench fully open the valves on both the gas vapor suction...

Page 64: ...s present depends on model of indoor unit On the outside of the bottom cover securely snap the C hooks in place at each location using the heel of the palm 4 Match the snaps at the top left and right sides of the bottom cover to their sockets and push to lock the bottom cover to the indoor unit Location 3 5 Verify the bottom cover is securely installed by pushing the bot tom cover to the indoor un...

Page 65: ... assemble and disassemble the air filter if standing on a ladder looking down at the top of the indoor unit Do not bend the air filter this damages it If the air filter is not assembled correctly dust and other substances will enter the indoor unit 2 Lifting the Air Filter by the Handles 3 Disassembling the Air Filter Air Filter Disassembly and Assembly HEV2 HFV3 and HXV2 Air Filter Disassembly 1 ...

Page 66: ...essure of the gas vapor suction service valve See optimum psig in table at right 2 Measure the air temperature from both the inlets and outlets 3 Verify the difference between the inlet and outlet temperatures is 14 4 F 4 The air conditioner is now ready to use Outside Ambient Temperature Gas Vapor Service Valve Pressure 95 F 120 135 psig Test Run After all installation procedures are complete the...

Page 67: ... when system is OFF WLAN Module s communication time will lag by about one 1 minute after unit is turned back on and in normal operating mode Entire lock or Mode lock cannot be set if heating or automatic operation is set through a central controller Disabling Cooling Only Mode After Pump Down procedure has been performed Cooling Only mode will need to be disabled and the system will need to be re...

Page 68: ...teps to place the unit into Cooling Only mode 1 Turn off the unit s power switch Connect a low pressure gauge manifold hose to the charge port on the gas vapor suction service valve 2 Open the gas vapor suction service valve halfway and purge the air in the manifold hose using the refrigerant 3 Fully close the liquid piping service valve 4 Turn on the unit s power switch and start the Cooling Only...

Page 69: ...d the inverter air conditioning operation cycle the meaning of the data displayed by SIMs and how to use the data to troubleshoot the system The Duct Free System air conditioning system must run for at least 15 20 minutes before data collected by SIMs is valid for trouble shooting The free SIMs app must be correctly installed on the smart phone before using SIMs Some outdoor units have an LGMV ext...

Page 70: ... Link Current Voltage EEV Mode Restart Timer Comp Mode EEV Indoor Info Tab Displays the following information Frequency Operation THM Mode REM Mode FAN EEV Air Temp Pipe in Pipe mid Pipe out Graph Info Tab This tab has three sub sections IDU Indoor Unit Temperature graph Displays IDU informa tion in graph format In formation displayed is for the IDU selected on the Main screen ODU Outdoor Unit Tem...

Page 71: ...l 4X 5 Communication error between indoor unit and outdoor unit 5X 6 Indoor unit outlet pipe sensor error 6X 9 Indoor unit EEPROM error 9X 10 Indoor unit BLDC motor fan lock 1X 12 Indoor unit middle pipe sensor error 2X 1X 21 DC Peak IPM Fault Compressor DC voltage was too high 2X 1X 22 Current Transformer2 CT2 error Alternating current AC input too high 2X 2X 23 DC Link Low Volt 2X 3X 25 AC Low H...

Page 72: ...4X 1X 44 Outdoor Air Sensor is disconnected or shorted out 4X 4X 45 Middle thermistor of outdoor unit condenser coil is disconnected or shorted out 4X 5X 46 Outdoor unit suction line thermistor is disconnected or shorted out 4X 6X 48 Outdoor unit coil outlet liquid line thermistor is disconnected or shorted out 4X 8X 53 Communication failure from outdoor unit to indoor unit 5X 3X 60 Outdoor unit p...

Page 73: ... ASHRAE Atlanta GA ASHRAE Inc Information about ASHRAE Standard 15 2010 34 2010 and addenda current as of the date of this publication Take appropriate actions at the end of HVAC equipment life to recover recycle reclaim or destroy R410A refrigerant according to applicable US EPA rules Total System Refrigerant Charge To calculate the potential refrigerant concentration level RCL 1 Measure the occu...

Page 74: ...efrigerant specialties were present Optional High quality R 410A rated full port ball valves Schrader between the valve body and the indoor units used at the indoor unit and at will in the refrigerant piping Condensate Pump Drain Installation Description Check Condensate drain installed on indoor units Extended condensate piping material used is acceptable under local code Insulated to prevent con...

Page 75: ...aretta Georgia 30022 www lghvac com IM_SZ_Wall_Mounted_HEV2_HFV3_HXV2_05_21 Supersedes IM_SZ_Mega_Mega115V_HEV2_HXV2_04_20 IM_SZ_Mega_Mega115V_HEV2_HXV2_08_19 IM_SZ_Mega_Mega115V_HEV2_HXV_06_19 IM_WallMounted_All_11_15 IM_WallMounted_All_08_15 20001747 ISO 9001 2008 LG ELECTRONICS INC ...

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