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LG Multi V 5, Service Manual

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LG Multi V 5 Service Manual Download Page 115

115

T

roubleshooting Main Components

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.

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because voltage, power supply current, or inverter output has no sine waveform. Also, output voltage changes when inverter
output voltage has a pulse wave pattern.

1. If using a movable tester to check if inverter output voltage is constant (when comparing relative voltage between lines), always use an analog me-

ter. Exercise particular caution if the inverter output frequency is low, when using a tester, where the change of measured voltage values is large

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2.

8VHDUHFWL¿HUYROWPHWHULIXVLQJDFRPPHUFLDOIUHTXHQF\WHVWHUWRPHDVXUHLQYHUWHURXWSXWYDOXHVZKHQPHDVXULQJDEVROXWHYDOXHV

Accurate measuring values cannot be obtained with a general movable tester (for analog and digital mode).

Checking the Outdoor Unit Fan

If there is a fan error, check the items below and follow the corresponding procedure listed.

Check

Problem

Solution

1. Fan motor is not

operating. (Does

fan motor fail

again when opera-

tion starts?)

2. Fan motor

vibration is exces-

sive.

Power supply is not

correct.

Check wire connections at the breaker.
Modify the power supply voltage if it is beyond permissible specifications.

Wiring is wrong.

• Check wiring connections.
• Check connector contacts.
• Check that all components are firmly secured (tighten screws).
• Check polarity connection.
• Check ground wiring and for short circuits.

Motor has failed.

Measure the winding resistance of the motor coils.

Fuse is defective.

Replace the fuse.

Circuit board is

defective.

Replace the circuit board following the steps below if errors occur again after resetting the
power, and if there are no errors similar to those specified above.(Carefully check both connec-
tor and ground wires when replacing the circuit board.)
• Replace only the fan control board. If operation begins, then the fan control board was

defective.

• Check and replace inverter board and / or main board if fan operation continues to fail.
• If problems continue to occur even after following the procedures above, then both boards

are defective.

Small Frame

Large Frame

Power Supply

208V/230V, 60Hz,

3-phase

460V, 60Hz,

3-phase

208V/230V, 60Hz,

3-phase

460V, 60Hz,

3-phase

Rating Output

1,500 W

1,200 W

900 W

900 W

Motor Resistance

at 167°F

ȍ

ȍ

ȍ

ȍ

CHECKING THE OUTDOOR UNIT FAN

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Summary of Contents for Multi V 5

Page 1: ...SERVICE MANUAL Variable Refrigerant Flow Outdoor Units 6 0 to 42 0 Tons ...

Page 2: ...e reference Content familiarity is required for proper installation The instructions included in this manual must be followed to prevent product malfunction property damage injury or death to the user or other people Incorrect operation due to ignoring any instructions will cause harm or damage The level of seriousness is classified by the symbols described by the summary list of safety precaution...

Page 3: ...door Unit DIP Switch Settings 96 Heat Recovery Unit Settings 97 102 Indoor Unit Addressing 103 104 Pipe Detection Addressing 105 110 Troubleshooting Main Components 111 124 Test Run 111 Main Component Errors 112 Self Diagnostics Check 113 Checking the Compressor 114 115 Checking the Outdoor Unit Fan Motor 115 Checking the Electronic Expansion Valves 116 118 Checking the Phase Bridge Diode 119 Chec...

Page 4: ... control box and panel covers If cover panels are not securely installed dust water and animals will HQWHU WKH RXWGRRU XQLW FDXVLQJ UH HOHFWULF VKRFN DQG SK VLFDO LQMXU RU 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 Periodically check that the outdoor frame is no...

Page 5: ...is used or air mixes with original refrigerant the unit will malfunction and damage will occur R QRW VWRUH RU XVH ÀDPPDEOH JDV FRPEXVWLEOHV QHDU the unit There is a risk of product failure Do not use the product for mission critical or special pur pose applications such as preserving foods works of art or other precision air conditioning applications The equipment is designed to provide comfort co...

Page 6: ...WK DSSURSULDWH ZLUH strain relief Improperly securing wires will create undue stress on equipment power FRQQHFWLRQV QDGHTXDWH FRQQHFWLRQV ZLOO JHQHUDWH KHDW FDXVH D UH and physical injury or death Ensure the system is connected to a dedicated power source that provides adequate power If the power source capacity is inadequate or the electric work is not SHUIRUPHG SURSHUO LW ZLOO UHVXOW LQ UH HOHFW...

Page 7: ...ution when cleaning or servicing the air conditioner There is risk of electric shock physical injury or death OHDQ XS WKH VLWH DIWHU VHUYLFLQJ LV QLVKHG DQG FKHFN WKDW no metal scraps screws or bits of wiring have been left inside or surrounding the unit Do not use the product for mission critical or special pur pose applications such as preserving food works of art or other precision air conditio...

Page 8: ...al Ratings B 208 230V 60Hz 3Ph D 460V 60Hz 3Ph Capacity Mbh Type M Combination Heat Pump or Heat Recovery Family ARU Multi V Outdoor Unit Refrigerant R410A Heat Recovery Units HRU PRHR 02 2A Series Number 2A Series Number Number of Ports 02 Two Ports 03 Three Ports 04 Four Ports Family PRHR Multi V Heat Recovery HR unit Refrigerant R410A 072 72 096 96 121 121 144 144 168 168 192 192 216 216 241 24...

Page 9: ...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 WIRING DIAGRAMS ARUM072BTE5 208 230V Outdoor Units 10 6 ...

Page 10: ...y 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 WIRING DIAGRAMS 208 230V Outdoor Units ARUM096BTE5 ARUM121BTE5 10 6 ...

Page 11: ...tinuous 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 WIRING DIAGRAMS 208 230V Outdoor Units ARUM144BTE5 ARUM168BTE5 12 6 ...

Page 12: ...ontinuous 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 ARUM192BTE5 ARUM216BTE5 ARUM241BTE5 WIRING DIAGRAMS 208 230V Outdoor Units 12 1 ...

Page 13: ...y 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 WIRING DIAGRAMS ARUM072DTE5 460V Outdoor Units 10 6 ...

Page 14: ...icy 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 WIRING DIAGRAMS ARUM096DTE5 ARUM121DTE5 460V Outdoor Units 10 6 ...

Page 15: ...ontinuous 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 ARUM144DTE5 ARUM168DTE5 WIRING DIAGRAMS 460V Outdoor Units 12 1 ...

Page 16: ... 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 ARUM192DTE5 ARUM216DTE5 ARUM241DTE5 WIRING DIAGRAMS 460V Outdoor Units 12 1 ...

Page 17: ...e 2 High Pressure Sensor 4 Way Valve 1 Suction Temperature Sensor Receiver Receiver Outlet Low Pressure Sensor Comp Discharge Temperatue Sensor Oil Separator Liquid Pipe Temperature Sensor Low Pressure Vapor Pipe High Pressure Vapor Pipe Liquid Pipe Inverter Comp Sub Cooling Circuit Outlet Temperature Sensor Sub Cooling HEX Sub Cooling Circuit Inlet Temperature Sensor Accum Pressure Switch Upper O...

Page 18: ...e 2 High Pressure Sensor 4 Way Valve 1 Suction Temperature Sensor Receiver Receiver Outlet Low Pressure Sensor Comp Discharge Temperatue Sensor Oil Separator Liquid Pipe Temperature Sensor Low Pressure Vapor Pipe High Pressure Vapor Pipe Liquid Pipe Inverter Comp Sub Cooling Circuit Outlet Temperature Sensor Sub Cooling HEX Sub Cooling Circuit Inlet Temperature Sensor Accum Pressure Switch Upper H...

Page 19: ...tdoor Unit HEX Temperature Sensor Outdoor Unit HEX Temperature Sensor Lower Hot Vapor Valve 4 Way Valve 2 High Pressure Sensor 4 Way Valve 1 Suction Temperature Sensor Receiver Receiver Outlet Low Pressure Sensor Comp Discharge Temperatue Sensor Oil Separator Liquid Pipe Temperature Sensor Low Pressure Vapor Pipe High Pressure Vapor Pipe Liquid Pipe Inverter Comp Sub Cooling Circuit Outlet Tempera...

Page 20: ...alve 4 Way Valve 2 High Pressure Sensor 4 Way Valve 1 Suction Temperature Sensor Receiver Receiver Outlet Low Pressure Sensor Comp Discharge Temperatue Sensor Oil Separator Liquid Pipe Temperature Sensor Low Pressure Vapor Pipe High Pressure Vapor Pipe Liquid Pipe Inverter Comp Sub Cooling Circuit Outlet Temperature Sensor Sub Cooling HEX Sub Cooling Circuit Inlet Temperature Sensor Accum Pressure...

Page 21: ...Way Valve 2 High Pressure Sensor 4 Way Valve 1 Suction Temperature Sensor Receiver Receiver Outlet Low Pressure Sensor Comp Discharge Temperatue Sensor Oil Separator Liquid Pipe Temperature Sensor Low Pressure Vapor Pipe High Pressure Vapor Pipe Liquid Pipe Inverter Comp Sub Cooling Circuit Outlet Temperature Sensor Sub Cooling HEX Sub Cooling Circuit Inlet Temperature Sensor Accum Pressure Switch...

Page 22: ...sor Receiver Receiver Outlet Low Pressure Sensor Comp 1 Discharge Temperatue Sensor Comp 2 Discharge Temperatue Sensor Oil Separator Oil Separator Liquid Pipe Temperature Sensor Low Pressure Vapor Pipe High Pressure Vapor Pipe Liquid Pipe Inverter Comp 1 Oil Balance Oil Balance Sub Cooling Circuit Outlet Temperature Sensor Sub Cooling HEX Sub Cooling Circuit Inlet Temperature Sensor SC EEV Accum P...

Page 23: ...1 Suction Temperature Sensor Receiver Receiver Outlet Low Pressure Sensor Comp 1 Discharge Temperatue Sensor Comp 2 Discharge Temperatue Sensor Oil Separator Oil Separator Liquid Pipe Temperature Sensor Low Pressure Vapor Pipe High Pressure Vapor Pipe Liquid Pipe Inverter Comp 1 Oil Balance Oil Balance Sub Cooling Circuit Outlet Temperature Sensor Sub Cooling HEX Sub Cooling Circuit Inlet Temperat...

Page 24: ...Temperature Sensor Receiver Receiver Outlet Low Pressure Sensor Comp 1 Discharge Temperatue Sensor Comp 2 Discharge Temperatue Sensor Oil Separator Oil Separator Liquid Pipe Temperature Sensor Low Pressure Vapor Pipe High Pressure Vapor Pipe Liquid Pipe Inverter Comp 1 Oil Balance Oil Balance Sub Cooling Circuit Outlet Temperature Sensor Sub Cooling HEX Sub Cooling Circuit Inlet Temperature Sensor...

Page 25: ...e Sensor 4 Way Valve 1 Suction Temperature Sensor Receiver Receiver Outlet Low Pressure Sensor Comp 1 Discharge Temperatue Sensor Comp 2 Discharge Temperatue Sensor Oil Separator Oil Separator Liquid Pipe Temperature Sensor Low Pressure Vapor Pipe High Pressure Vapor Pipe Liquid Pipe Inverter Comp 1 Oil Balance Sub Cooling Circuit Outlet Temperature Sensor Sub Cooling HEX Sub Cooling Circuit Inlet...

Page 26: ...re Sensor 4 Way Valve 1 Suction Temperature Sensor Receiver Receiver Outlet Low Pressure Sensor Comp 1 Discharge Temperatue Sensor Comp 2 Discharge Temperatue Sensor Oil Separator Oil Separator Liquid Pipe Temperature Sensor Low Pressure Vapor Pipe High Pressure Vapor Pipe Liquid Pipe Inverter Comp 1 Oil Balance Oil Balance Sub Cooling Circuit Outlet Temperature Sensor Sub Cooling HEX Sub Cooling ...

Page 27: ...Temperature Sensor Lower Hot Vapor Valve 4 Way Valve 2 High Pressure Sensor 4 Way Valve 1 Suction Temperature Sensor Receiver Receiver Outlet Low Pressure Sensor Comp Discharge Temperatue Sensor Oil Separator Liquid Pipe Temperature Sensor Low Pressure Vapor Pipe High Temperature High Pressure Vapor High Temperature High Pressure Liquid High Temperature High Pressure Liquid Conditional Low Tempera...

Page 28: ...mperature Sensor 4 Way Valve 2 High Pressure Sensor 4 Way Valve 1 Suction Temperature Sensor Receiver Receiver Outlet Low Pressure Sensor Comp Discharge Temperatue Sensor Oil Separator Low Pressure Vapor Pipe High Pressure Vapor Pipe Liquid Pipe Liquid Pipe Temperature Sensor Inverter Comp Sub Cooling Circuit Outlet Temperature Sensor Sub Cooling HEX Sub Cooling Circuit Inlet Temperature Sensor Pr...

Page 29: ...EX Temperature Sensor 4 Way Valve 2 High Pressure Sensor 4 Way Valve 1 Suction Temperature Sensor Receiver Receiver Outlet Low Pressure Sensor Comp Discharge Temperatue Sensor Oil Separator Liquid Pipe Temperature Sensor Low Pressure Vapor Pipe High Pressure Vapor Pipe Liquid Pipe Inverter Comp Sub Cooling Circuit Outlet Temperature Sensor Sub Cooling HEX Sub Cooling Circuit Inlet Temperature Sens...

Page 30: ... Unit HEX Temperature Sensor 4 Way Valve 2 High Pressure Sensor 4 Way Valve 1 Suction Temperature Sensor Receiver Receiver Outlet Low Pressure Sensor Comp Discharge Temperatue Sensor Oil Separator Liquid Pipe Temperature Sensor Low Pressure Vapor Pipe High Pressure Vapor Pipe Liquid Pipe Inverter Comp Sub Cooling Circuit Outlet Temperature Sensor Sub Cooling HEX Sub Cooling Circuit Inlet Temperatu...

Page 31: ...mperature Sensor 4 Way Valve 2 High Pressure Sensor 4 Way Valve 1 Suction Temperature Sensor Receiver Receiver Outlet Low Pressure Sensor Comp Discharge Temperatue Sensor Oil Separator Liquid Pipe Temperature Sensor Low Pressure Vapor Pipe High Pressure Vapor Pipe Liquid Pipe Inverter Comp Sub Cooling Circuit Outlet Temperature Sensor Sub Cooling HEX Sub Cooling Circuit Inlet Temperature Sensor Ac...

Page 32: ...HEX Temperature Sensor 4 Way Valve 2 High Pressure Sensor 4 Way Valve 1 Suction Temperature Sensor Receiver Receiver Outlet Low Pressure Sensor Comp Discharge Temperatue Sensor Oil Separator Liquid Pipe Temperature Sensor Low Pressure Vapor Pipe High Pressure Vapor Pipe Liquid Pipe Inverter Comp Sub Cooling Circuit Outlet Temperature Sensor Sub Cooling HEX Sub Cooling Circuit Inlet Temperature Sen...

Page 33: ...or Oil Separator Liquid Pipe Temperature Sensor Low Pressure Vapor Pipe High Pressure Vapor Pipe Liquid Pipe Inverter Comp Sub Cooling Circuit Outlet Temperature Sensor Sub Cooling HEX Sub Cooling Circuit Inlet Temperature Sensor SC EEV Accum Pressure Switch Receiver Inlet SC Suction Oil Return Heatsink Active Path Valve Comp Vapor Injection Pressure Sensor Pressure Switch Temperature Sensor Remar...

Page 34: ... Temperatue Sensor Oil Separator Liquid Pipe Temperature Sensor Low Pressure Vapor Pipe High Pressure Vapor Pipe Liquid Pipe Inverter Comp Sub Cooling Circuit Outlet Temperature Sensor Sub Cooling HEX Sub Cooling Circuit Inlet Temperature Sensor Accum Pressure Switch SC Suction Oil Return Heatsink Active Path Valve Receiver Inlet Comp Vapor Injection Pressure Sensor Pressure Switch Temperature Sen...

Page 35: ...alve 1 Suction Temperature Sensor Receiver Receiver Outlet Low Pressure Sensor Oil Balance Oil Balance Comp 1 Discharge Temperatue Sensor Comp 2 Discharge Temperatue Sensor Oil Separator Oil Separator Liquid Pipe Temperature Sensor Low Pressure Vapor Pipe High Pressure Vapor Pipe Liquid Pipe Inverter Comp 1 Inverter Comp 2 Sub Cooling Circuit Outlet Temperature Sensor Sub Cooling HEX Sub Cooling C...

Page 36: ...ssure Sensor 4 Way Valve 1 Suction Temperature Sensor Receiver Receiver Outlet Low Pressure Sensor Oil Balance Oil Balance Comp 1 Discharge Temperatue Sensor Comp 2 Discharge Temperatue Sensor Oil Separator Oil Separator Liquid Pipe Temperature Sensor Low Pressure Vapor Pipe High Pressure Vapor Pipe Liquid Pipe Inverter Comp 1 Inverter Comp 2 Sub Cooling Circuit Outlet Temperature Sensor Sub Cooli...

Page 37: ...lve 2 High Pressure Sensor 4 Way Valve 1 Suction Temperature Sensor Receiver Receiver Outlet Low Pressure Sensor Oil Balance Oil Balance Comp 1 Discharge Temperatue Sensor Comp 2 Discharge Temperatue Sensor Oil Separator Oil Separator Liquid Pipe Temperature Sensor Low Pressure Vapor Pipe High Pressure Vapor Pipe Liquid Pipe Inverter Comp 1 Inverter Comp 2 Sub Cooling Circuit Outlet Temperature Se...

Page 38: ... Way Valve 2 High Pressure Sensor 4 Way Valve 1 Suction Temperature Sensor Receiver Receiver Outlet Low Pressure Sensor Oil Balance Oil Balance Comp 1 Discharge Temperatue Sensor Comp 2 Discharge Temperatue Sensor Oil Separator Oil Separator Liquid Pipe Temperature Sensor Low Pressure Vapor Pipe High Pressure Vapor Pipe Liquid Pipe Inverter Comp 1 Inverter Comp 2 Sub Cooling Circuit Outlet Tempera...

Page 39: ...igh Pressure Sensor 4 Way Valve 1 Suction Temperature Sensor Receiver Receiver Outlet Low Pressure Sensor Oil Balance Oil Balance Comp 1 Discharge Temperatue Sensor Comp 2 Discharge Temperatue Sensor Oil Separator Oil Separator Liquid Pipe Temperature Sensor Low Pressure Vapor Pipe High Pressure Vapor Pipe Liquid Pipe Inverter Comp 1 Inverter Comp 2 Sub Cooling Circuit Outlet Temperature Sensor Su...

Page 40: ...alve 2 High Pressure Sensor 4 Way Valve 1 Suction Temperature Sensor Receiver Receiver Outlet Low Pressure Sensor Oil Balance Oil Balance Comp 1 Discharge Temperatue Sensor Comp 2 Discharge Temperatue Sensor Oil Separator Oil Separator Liquid Pipe Temperature Sensor Low Pressure Vapor Pipe High Pressure Vapor Pipe Liquid Pipe Inverter Comp 1 Inverter Comp 2 Sub Cooling Circuit Outlet Temperature S...

Page 41: ... Sensor Comp 2 Discharge Temperatue Sensor Oil Separator Oil Separator Liquid Pipe Temperature Sensor Low Pressure Vapor Pipe High Pressure Vapor Pipe Liquid Pipe Inverter Comp 1 Inverter Comp 2 Sub Cooling Circuit Outlet Temperature Sensor Sub Cooling HEX Sub Cooling Circuit Inlet Temperature Sensor SC EEV Accum Pressure Switch Receiver Inlet SC Suction Oil Return Heatsink Active Path Valve Comp ...

Page 42: ...peratue Sensor Comp 2 Discharge Temperatue Sensor Oil Separator Oil Separator Liquid Pipe Temperature Sensor Low Pressure Vapor Pipe High Pressure Vapor Pipe Liquid Pipe Inverter Comp 1 Inverter Comp 2 Sub Cooling Circuit Outlet Temperature Sensor Sub Cooling HEX Sub Cooling Circuit Inlet Temperature Sensor SC EEV Accum Pressure Switch Receiver Inlet Oil Return Heatsink Active Path Valve Comp 1 Va...

Page 43: ...se Normal Operation Compressor Control Fuzzy logic helps ensure stable system performance by maintaining a constant evaporating temperature Te in cooling mode and a constant condensing temperature Tc in heating mode Both Te cooling and Tc heating can be set at various steps in the installation mode Cooling Mode Te 35 6 41 F Heating Mode Tc 116 6 123 8 F Te and Tc can be determined simultaneously b...

Page 44: ...ling EEV Control Subcooling EEV operates with fuzzy logic to keep the degree of subcool about 59 F at the outlet of the subcooler stable during cooling mode Degree of Subcool Tcondensation Tliquid where Tliquid Temperature at the outlet of the subcooler F Tcondensation Condensation temperature equivalent to high pressure F Master and Slave Unit EEVs Fan Motor Control Avoiding Excessively High Disc...

Page 45: ...ontrol Normal Control Thermo Off Unit EEV 40 Pulse 400 Pulse 40 Pulse Oil Return Signal Off On Off Start Oil Return Operation begins when the oil sensor continuously measures low oil levels Oil Return Operation will run for three 3 minutes Stop Oil Return Operation will end if when compressor protection control starts Table 4 Outdoor Unit Oil Return Control in Heating Mode Component Start During O...

Page 46: ...l Operation will stop if when compressor protection control starts if a high discharge temperature at the compressor is detected Partial Defrost The heat exchanger in the outdoor unit s is divided into a top part and bottom part for partial defrost operation Partial defrost operation permits the system to defrost the parts of the heat exchanger separately so heating mode can operate continuously E...

Page 47: ...eat Recovery Off Stop Operation Control in Cooling Mode Stop Operation Control in Heating Mode Component Stop Operation Notes Inverter Compressor Off Fan Stop Main EEV 32 Pulse Subcooling EEV 16 Pulse Stop Minimum Pulse Four Way Valve 1 On Off when air temperature is 86 F Four Way Valve 2 Off Table 10 Stop Operation Control in Cooling Mode Table 11 Stop Operation Control in Heating Mode Oil Equali...

Page 48: ...able 13 Low Pressure Control in Cooling Mode Pressure Range Compressor Fan 3V SVL Stop one 1 minute later Stop 3V SVL 15 Hz 10 seconds 100 RPM 10 seconds Ps 21 8 psi Frequency Hold 100 RPM 10 seconds Ps 23 2 psi RU OHVV VHFRQGV 100 RPM 10 seconds Ps 27 6 psi RU OHVV VHFRQGV 100 RPM 10 seconds Ps 31 9 psi Normal Control Frequency Hold Frequency or RPM is not increasing can decrease Pressure Control...

Page 49: ...ess 25A or less 25A or more 25A or more 27A or more 27A or more ARUM241DTE5 20 6 8 6 8 25A or less 25A or less 25A or more 25A or more 27A or more 27A or more Compressor Current ARUM072DTE5 6 4 8 20A or less 20A or more 30A or more ARUM096DTE5 8 6 8 29A or less 29A or more 41A or more ARUM121DTE5 10 6 8 29A or less 29A or more 41A or more ARUM144DTE5 12 4 8 4 8 20A or less 20A or less 20A or more ...

Page 50: ...nds Total system capacity master and slave units is displayed for two 2 seconds System type is displayed 3 is default Heat Pump 2 Heat Recovery 3 Electrical requirements are displayed 208 230V 22 460V 46 Model Type 22 14 12 48 3 46 30 Step 2 Communication Check If display follows all sequences as shown above the communication between the Master and Slave outdoor units is normal If the SSD shows Er...

Page 51: ... except for No 3 on SW01B which must be ON to enable Gen 4 features All other combinations of switches one 1 through seven 7 must be left in the OFF position on the outdoor unit DIP switch bank SW01B Refer to System Combinations and Outdoor Unit Operation Settings for proper setting of No 3 on SW01B If the Auto Address Procedure has never been successfully completed for the system the compressor s...

Page 52: ...0 seconds Auto Addressing Procedure Starts Wait Three 3 Minutes While Outdoor Unit Sequences Through Self Diagnostics Check Proceed when LED is Blank Turn Power On Press and Hold RED SW01C Button for Five 5 Seconds LED Displays 88 Release RED SW01C Button Wait Three 3 to Seven 7 Minutes LED Displays YES NO Check the communication cable connections 88 Auto Addressing Procedure Ends The address numb...

Page 53: ... TM terminals and is terminated on the outdoor unit terminal tagged IDU B 3 Verify the shield of the communications cable is grounded at the outdoor unit only All segment shields must be spliced together at each indoor unit and NOT grounded 4 After repairing the communications cable go to Step 9 of the Auto Addressing Procedure and repeat the process until successful Press and hold the red SW01C b...

Page 54: ... and Diagnostics Fdd Refrigerant Auto Charge Cooling Fd1 Refrigerant Auto Charge Heating Fd2 Refrigerant Auto Judge Cooling Fd3 Refrigerant Auto Judge Heating Fd4 Integrated Test Run Fd7 All Indoor Unit Cooling Operation Fd8 cooL oFF oFF on All Indoor Unit Heating Operation Fd9 hEAt oFF oFF on Function Func Cool Heat Selector Switch Installed Fn1 oFF oFF oP1 oP2 Saved in EEPROM Off Not Installed S...

Page 55: ...in Low Temperature Heating Fn22 oFF on oFF Saved in EEPROM Drain Pan Heater Optional Accessory Fn23 oFF on oFF Saved in EEPROM User Idu Comfort Cooling Id10 EAch Saved in EEPROM Service SvC Pump Down SE1 Pd Pd Pump Out SE2 Po Po Vacuum Mode SE3 vAcc vAcc One Time One Selection Manual Backup for Inverter Compressor SE4 oFF oFF inv1 inv2 unit backup Saved in EEPROM Forced Oil Return SE5 01 oFF on oF...

Page 56: ...RQILUP Ɣ button 4 6HOHFW WKH LQY 2SWLRQ E XVLQJ WKH 6 IRUZDUG ŹDQG 6 EDFNZDUGŻ EXWWRQV WKHQ SXVK WKH 6 FRQILUP Ɣ button 5 6HOHFW FWLRQ RQ E XVLQJ WKH 6 IRUZDUG ŹDQG 6 EDFNZDUGŻ EXWWRQV WKHQ SXVK WKH 6 FRQILUP Ɣ EXWWRQ If Slave 2 Outdoor Unit Fails 1 Ensure Slave 2 Outdoor Unit PCB No 5 DIP Switch on DIP SW01 DIP switch bank is set to ON 2 6HOHFW WKH 69 0RGH E XVLQJ WKH 6 IRUZDUG ŹDQG 6 EDFNZDUGŻ E...

Page 57: ...seconds to reset all data and return to operation standby 6 7R UHVHW WKH V VWHP LI WKH WHVW UXQ PXVW EH VKXW RII EHFDXVH RI DQ HUURU SUHVV WKH 6 DQFHO DQG 6 Ɣ H HFXWH EXWWRQ simultaneously for more than five 5 seconds 7 All indoor units are turned off or the results are displayed for ninety 90 seconds after the test run is finished 8 If all FDD functions wish to be used first press the main PCB SW...

Page 58: ...ate and add the proper amount of refrigerant Refrigerant charging time can be different depending on the amount necessary Approximate charge time is about 6 6 minutes per pound Yes Yes Yes Yes Yes Yes Cooling Heating No No No No No No No Start Display Start the auto refrigerant charge procedure Is the cycle instable Reverse switch indoor units off Are the temperature load conditions suitable Is th...

Page 59: ...erant and scale sold separately 2 Connect manifold to refrigerant charge port as shown 3 Connect manifold and refrigerant cylinder 4 Perform the air purge procedure for each manifold hose 5 When appear push the SW03C forward ŹRU 6 EDFNZDUGŻ EXWWRQ 6 When or appear open the valve and add refrigerant to the system 7 When or appear close the valve and remove the connected charge port Heat Recovery He...

Page 60: ...ndition stable After 40 minutes End Cooling Heating The number on the SSD is the percentage of refrigerant that is overcharged or undercharged per the total refrigerant amount ex1 ĺ 20 Refrigerant Overcharge ĺ Need to Remove ex2 ĺ 20 Refrigerant Undercharge ĺ Need to Add ex3 ĺ No Adjustment Necessary Start system full load operation operates for 15 minutes Refrigerant Amount Auto Measure function ...

Page 61: ...ory refrigerant charge shipped with each outdoor unit 6HH WKH VSHFL FDWLRQ WDEOHV LQ WKH 3URGXFW DWD VHFWLRQ IRU WKH IDFWRU UHIULJHUDQW FKDUJH LQ SRXQGV Example ARUM432BTE5 RQVLVWLQJ RI 580 7 580 7 Factory charge ARUM121BTE5 23 2 lbs each Factory charge ARUM192BTE5 30 9 lbs Field trim charge 10 5 lbs 6 VWHP UHIULJHUDQW FKDUJH DFWRU FKDUJH RI IUDPH UDPH UDPH LHOG VXSSOLHG 5HIULJHUDQW 6 VWHP UHIULJH...

Page 62: ...f 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 Multi V ITR Result Report Continued OTHER CONTROLS Setting Optional Modes ...

Page 63: ...ating during the winter months OTHER CONTROLS Setting Optional Modes The All Indoor Unit Cooling or All Indoor Heating function as well as other FDD algorithm could take up to forty 40 minutes to complete depending on the number of indoor units connected to the system Function Code Default Setting All Indoor Unit Cooling Operation Fd8 cooL oFF on All Indoor Unit Heating Operation Fd9 hEAt oFF on T...

Page 64: ...ssed the lower switch has the right side depressed and the system is operating in cooling The right side of the upper switch is depressed the lower switch has the left side depressed and the system is operating in heating Use the Cool Heat Selector in heat pump systems to set the system mode for all cooling operation all heating operation fan only or dry operation when all indoor units have to be ...

Page 65: ... heat recovery systems Table 24 Setting Static Pressure Compensation Function Turn No 5 on the master outdoor unit PCB DIP switch bank SW01 to ON 6HOHFW WKH XQF PRGH E XVLQJ WKH 6 IRUZDUG ŹEXWWRQ DQG WKH 6 EDFNZDUG Ż EXWWRQ DQG WKHQ SUHVV WKH 6 FRQILUP Ɣ EXWWRQ 6HOHFW WKH Q IXQFWLRQ E XVLQJ WKH 6 IRUZDUG ŹEXWWRQ DQG WKH 6 EDFNZDUG Ż EXWWRQ DQG WKHQ SUHVV WKH 6 FRQILUP Ɣ EXWWRQ Select from oFF op1 ...

Page 66: ...by the outdoor unit Turn No 5 on the master outdoor unit PCB DIP switch bank SW01 to ON 6HOHFW WKH XQF PRGH E XVLQJ WKH 6 IRUZDUG ŹEXWWRQ DQG WKH 6 EDFNZDUG Ż EXWWRQ DQG WKHQ SUHVV WKH 6 FRQILUP Ɣ EXWWRQ 6HOHFW WKH Q IXQFWLRQ E XVLQJ WKH 6 IRUZDUG ŹEXWWRQ DQG WKH 6 EDFNZDUG Ż EXWWRQ DQG WKHQ SUHVV WKH 6 FRQILUP Ɣ EXWWRQ Select from op1 through op12 options see table by using the 6 IRUZDUG ŹEXWWRQ ...

Page 67: ... WKH 6 IRUZDUG ŹEXWWRQ DQG WKH 6 EDFNZDUG Ż EXWWRQ DQG WKHQ SUHVV WKH 6 FRQILUP Ɣ EXWWRQ 6HOHFW WKH Q IXQFWLRQ E XVLQJ WKH 6 IRUZDUG ŹEXWWRQ DQG WKH 6 EDFNZDUG Ż EXWWRQ DQG WKHQ SUHVV WKH 6 FRQILUP Ɣ EXWWRQ Select from on through oFF options see table by using the 6 IRUZDUG ŹEXWWRQ DQG WKH 6 EDFNZDUG Ż EXWWRQ DQG WKHQ SUHVV WKH 6 FRQILUP Ɣ EXWWRQ Defrost Mode is set PCB does not need reset Outdoor...

Page 68: ...n system pres sure is reduced the defrost cycle is initiated Snow Removal Assist Rapid Defrost can also be used with Fn4 Overall Defrost and Fn22 Overall Defrost Operating in Low Temperatures Heating Snow Removal Assist and Rapid Defrost can be used on both heat pump and heat recovery systems A trained LG service provider must set this function during system installation If the snow removal rapid ...

Page 69: ... known that the outdoor unit is operating at full capacity during the heating season and the indoor unit air temperature in all zones is low or when it feels drafty in almost all of the conditioned zones served by the system The function can be used to lower or raise the indoor unit leaving air temperatures when the outdoor unit is undersized or the system is operating with a compressor out of ser...

Page 70: ...ing Operation Is Not Selected on High Efficiency Function Cooling Operation Selected Table 30 6HWWLQJ WKH LJK I FLHQF XQFWLRQ RROLQJ 2SHUDWLRQ Low Ambient Kit Function Fn9 The function notifies the outdoor unit that a low ambient kit is installed Use in zones that will need cooling when outdoor ambient temperatures fall below 5ºF Optional low ambient baffle kits allow for Multi V 5 outdoor unit op...

Page 71: ...et High Efficiency Function Operation Auto Dust Throw Mode Fn11 High Efficiency Function Auto Dust Throw Mode helps remove dirt sand debris that could have collected on the outdoor unit coil surface After the cooling heating etc mode is satisfied and the compressors are idle this function will start the fan motors operat ing them at full speed and in the reverse direction for a certain pe riod Air...

Page 72: ...on could assist in reducing energy by low ering compressor lift during off peak hours and shoulder seasons The function adjusts compressor lift by reading outdoor ambient temperature humidity if FN16 is set to on and current heating or cooling demand in real time rolling twenty 20 minute log Smart Load Control Options Smooth Mode oP1 Maximize energy savings rate of temperature change less importan...

Page 73: ...tions see table by using the SW03C IRUZDUG ŹEXWWRQ DQG WKH 6 EDFNZDUG Ż EXWWRQ DQG WKHQ SUHVV WKH 6 FRQILUP Ɣ EXWWRQ Press the SW01D Reset Button one 1 time to reset PCB Humidity Reference is set Figure 23 Setting the Humidity Reference Function OTHER CONTROLS Setting Optional Modes Power Consumption Display Fn21 The function tells the outdoor unit master outdoor unit if a multi frame system that ...

Page 74: ...erating in Low Temperatures Heating is set PCB does not need reset Drain Pan Heater Optional Function Fn23 Informs the master outdoor unit microprocessor that an optional field installed drain pan heater sold separately is installed The optional drain pan heat er maintains the bottom of the outdoor unit 32ºF to keep condensate from freezing Selecting to engage this option must only be done if a pr...

Page 75: ...t is ON Access the outdoor unit SSD display on the main PCB Select which indoor units will operate in Comfort Cooling Select ALL if Comfort Cooling is to be applied to all indoor units Select EACH if Comfort Cooling is to be applied to some indoor units After the selection is made SUHVV WKH 6 FRQILUP Ɣ EXWWRQ If EACH was selected the indoor units that are to be operating in Comfort Cooling must be...

Page 76: ...es to each outdoor unit closed See figures at right for instructions on which vapor service valve is WR EH RSHQ IRU ZKLFK V VWHP Liquid Pipe Closed Open Closed Closed Closed Closed Closed Closed Closed Closed Open Closed Low Pressure Vapor Pipe High Pressure Vapor Pipe Liquid Pipe Not Used Keep Closed Vapor Pipe Liquid Pipe Not Used Keep Closed Vapor Pipe Liquid Pipe Low Pressure Vapor Pipe High P...

Page 77: ...essure falls below 44 5 psi light will blink immediately close the vapor service valves of all outdoor units Yes No Low pressure 33 2 psi Current low pressure Current low pressure Liquid Pipe Closed Closed Closed Closed Closed Closed Closed Closed Closed Open Closed Open Low Pressure Vapor Pipe High Pressure Vapor Pipe Liquid Pipe Not Used Keep Closed Vapor Pipe Liquid Pipe Not Used Keep Closed Va...

Page 78: ...ressure Vapor Pipe Liquid Pipe Vapor Pipe Service Ports Refrigerant Charging Valve Master Outdoor Unit Heating Mode Slave 2 Outdoor Unit Heating Mode Slave 1 Outdoor Unit Heating Mode 1 Verify the liquid pipe and low pressure vapor pipe of the outdoor unit are closed for Pump Out operation Open the high pressure vapor pipe service valve 2 Operate Pump Out function 3 Close high pressure vapor pipe ...

Page 79: ... Unit Heating Mode Slave 1 Outdoor Unit Heating Mode Pump Out for Heat Pump Systems Example of Pump Out Function When Slave2 Outdoor Unit Experiences Inverter Compressor Failure 1 Verify the liquid pipe of the outdoor unit is closed for Pump Out operation Open the vapor pipe service valve 2 Operate Pump Out function 3 Close the vapor pipe service valve of unit after Pump Out is complete 4 Replace ...

Page 80: ...t Button on the Outdoor Unit PCB On a Multi Frame System Push the Reset Button on ALL Outdoor Units Vacuum Mode SE3 vAcc The vacuum mode can be used as an option for creating vacuum in the system when the outdoor unit is first installed if power is avail able and if the system has already been auto addressed Vacuum mode enables the system to fully open all valves and can help speed up the evacuati...

Page 81: ...or unit for an extended period will lead to multiple compressor failures in the system Do not forget to turn this function OFF after the compressor is replaced The Manual Back Up for Inverter Compressor function requires the WUDLQHG VHUYLFH SURYLGHU WR VHW WKH PLFURSURFHVVRU RQ WKH VSHFL F outdoor unit with the malfunctioning compressor Table 41 Setting Manual Back Up Function Settings Function oF...

Page 82: ... is twenty four 24 minutes On multi frame systems the entire coil on each frame will defrost concurrently total system defrost cycle time is twenty 20 minutes For use on both heat pump and heat recovery systems Forced Defrost can also be used with Fn4 Overall Defrost Fn6 Snow Removal Assist Rapid Defrost oP2 or oP3 and Fn22 Overall Defrost Operating in Low Temperatures Combining all of these funct...

Page 83: ... information Option Description Display Example seg_1 seg_2 seg_3 seg_4 op1 Current High Pressure P1 4 320 9 kPA 626 7 psi 4 3 2 1 op2 Current Low Pressure P2 1 234 2 kPA 179 psi 1 2 3 4 op3 Inv 1 Pulse h1 120 Hz 1 2 0 op4 Inv 2 Pulse h2 30 3 0 op5 Fan RPMs h3 110 1 1 0 op6 Degree of Subcooling T1 5 3 C 41 5 F 5 3 op7 Degree of Superheating T2 4 5 C 23 9 F 4 5 op8 Outdoor Unit Temperature T3 10 C ...

Page 84: ... the indoor condenser coil More sub cooling keeps gas bubbles from forming before the liquid passes through the condenser coil EEV valve Can be used with Fn14 Smart Load Control and Id10 Comfort Cooling without severely impacting the energy saved or reducing comfort levels For use on both heat pump and heat recovery systems Because of the restricted refrigerant flow it will take longer to preheat ...

Page 85: ...of Partial Defrosts function begins No outdoor unit PCB reset or power cycle required Table 46 Setting the Number of Partial Defrosts Function Settings Partial Defrosts Cycles oFF Default Function not set 2 is factory set oP1 1 oP2 2 oP3 3 oP4 4 oP5 5 oP6 6 oP7 7 oP8 8 oP9 9 oP10 10 oP11 11 Fan Low Sound in Heating SE11 The Fan Low Sound in Heating mode reduces outdoor unit fan speed when the syst...

Page 86: ...nd the possibility exists that an electronic expansion valve is open or if liquid could return to the compressor Apply this function only after confirming that all indoor units without power or indoor units that cannot establish communication with the outdoor unit have expansion valves in the closed position Use in applications where the LG trained service technician wants to restart a system for ...

Page 87: ...ly using system logic Errors can be displayed every six 6 hours Request service immediately if error occurs Auto Back Up Function is set up to one 1 inverter compressor When Auto Back Up Function begins the error code displays for ten 10 minutes every six 6 hours Error will display continuously at the corresponding outdoor unit Inverter compressor failure Error Nos 21 22 26 27 may occur Outdoor un...

Page 88: ...Bypass Valve LBV Prevents Liquid Charge Solenoid Assembly 1 2 SOL1 2 Controls Path for Heating or Cooling Liquid Pipe 2 LP2 Liquid Pipe to the Indoor Unit s Vapor Pipe GSP Vapor Pipe to the Indoor Units Balancing Valve BLV Controls the Pressure Between High and Low Pressure Pipes During Operation Changeover Subcooling EEV SCEEV Controls Subcooling Balancing Valve Subcooling EEV Low Pressure Vapor ...

Page 89: ...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 PRHR022A Heat Recovery Unit HEAT RECOVERY UNIT DIMENSIONAL DIAGRAMS ...

Page 90: ...y 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 PRHR032A Heat Recovery Unit HEAT RECOVERY UNIT DIMENSIONAL DIAGRAMS ...

Page 91: ...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 PRHR042A Heat Recovery Unit HEAT RECOVERY UNIT DIMENSIONAL DIAGRAMS ...

Page 92: ...r 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 PRHR022A 032A 042A HEAT RECOVERY UNIT WIRING DIAGRAM ...

Page 93: ...ion between inlet of one indoor unit and outlet of another indoor unit during simultaneous operation C Prevents liquid from entering high pressure vapor valve and heat recovery unit during cooling mode D Controls pressure between the high and low pressure vapor pipes during simultaneous operation Low Pressure Vapor Pipe Liquid Pipe Liquid pipe Vapor pipe Liquid pipe Vapor pipe Liquid pipe Vapor pi...

Page 94: ...ons in the Mode Change Time Calculation table How the valves are controlled by the Mode Change Time can be seen in the Valve Control by Mode Change Time table Table 51 ModeChangeTimeCalculation Previous Mode Change Mode Mode Change Time Stop or Ventilation Cooling or Heating 120 seconds Cooling Heating 180 seconds Heating Cooling 120 seconds Cooling or Heating Stop or Ventilation During Heating 60...

Page 95: ...gh Pressure Vapor Valve Keep Close Open or Close Low Pressure Vapor Valve Keep Open Open or Close Balancing Valve Open for 30 seconds Close Close Special Control Liquid Bypass Control Are the Indoor Units Operating Are All the Indoor Units Operating in Cooling Mode Solenoid Valve Open for Liquid SDVV LJK 3UHVVXUH 9DSRU ĺ Low Pressure Vapor Valve Yes No Subcooling EEV Control Subcooling EEV operate...

Page 96: ...ill show HR heat recovery 3XVK WKH Ź 6 EXWWRQ WR FKDQJH 5 KHDW UHFRYHU WR 3 KHDW SXPS WKHQ SUHVV WKH FRQILUP 6 EXWWRQ Flip switch No 4 on the DIP SW01 bank to OFF and push the reset SW01D button to restart the system If No 4 on the DIP SW01 bank is switched to ON again HR heat recovery or HP heat pump can be verified by reading the display later 1 2 7 6 5 4 3 1 2 7 6 5 4 3 ON OFF Figure 40 Heat Re...

Page 97: ...of each heat recovery unit is the same assign address 0 to the heat recovery unit farthest away from the outdoor unit Assign the next address to the next farthest away and so on until all heat recovery units have an address The heat recovery unit with the highest address must be the one closest to the outdoor unit Up to 16 heat recovery units can be on a single system Possible settings in order of...

Page 98: ...t No 4 Valve group setting No 5 Valve group setting No 6 Valve group setting No 7 Used only in factory production preset to OFF Zone setting ON No 8 Used only in factory production preset to OFF Selecting the Heat Recovery Unit Valve Addressing Method Pipe Detection Auto Manual Zone Control Setting DIP Switch Settings Normal Control Zone Control 1 Main Function of SW02M 1 2 7 6 5 4 3 1 2 7 8 6 5 4...

Page 99: ...rd and fourth ports and set the DIP switches on the heat recovery unit for two ports connected as shown in the table above Any unused port must be sealed with a brazed copper cap not with a plastic cap PRHR032A Three 3 ports PRHR022A Two 2 ports PRHR042A Four 4 ports 1 2 3 1 2 1 3 2 4 Select the Heat Recovery Unit Model 1 Identify how many ports are connected see table below 2 Group ports if neces...

Page 100: ...xample Indoor unit Indoor unit Large capacity indoor unit Indoor unit Indoor unit Large capacity indoor unit Indoor unit Indoor unit Large capacity indoor unit Large capacity indoor unit Large capacity indoor unit Indoor unit Indoor unit Indoor unit Indoor unit 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 Control 1 1 2 7 8 6 5 4 3 ON OFF 2 3 4 5 6 7 8 1 1 2 7 8 6 5 4 3 ON OFF 2 3 4 5 6 7 8 1 1 2 7 8 6 ...

Page 101: ...valve address by one 1 Each indoor unit must have a unique preset central control address using its wired controller before manual valve addressing can occur PCB Component S W No Set Up No 1 Manual Addressing Valve No 1 No 2 Manual Addressing Valve No 2 No 3 Manual Addressing Valve No 3 No 4 Manual Addressing Valve No 4 SW03M Increases the Valve Address by Ten 10 SW04M Increases the Valve Address ...

Page 102: ...by One 1 SW05M Manual Addressing of Zoned Indoor Units 1 1 2 4 3 ON OFF 2 3 4 SW01M 6 0 6 0 6 0 3 DQG 7DFW 6ZLWFKHV IRU 0DQXDO 9DOYH Addressing continued Zoning Set the address of the heat recovery unit valve to the central control address of the connected indoor unit SW01M Select the valve to address SW03M Increases the valve address by ten 10 SW04M Increases the valve address by one 1 SW05M Rota...

Page 103: ...ubleshooting section for information on how to resolve Error No CH200 During the pre commissioning process for systems with Gen 4 indoor units do not change any DIP switch settings except for No 3 on SW01B which must be ON to enable Gen 4 features All other combinations of switches one 1 through seven 7 must be left in the OFF position on the outdoor unit DIP switch bank SW01B If the Auto Address ...

Page 104: ...ng Flowchart INDOOR UNIT ADDRESSING Troubleshooting a Failed Indoor Unit Auto Addressing Procedure If the quantity of indoor units the auto addressing procedure found is incorrect or the 88 never disappears from the display for the seven 7 minutes the auto address procedure has failed and a communications problem exists If the Auto Address Procedure failed 1 Verify ALL indoor unit ON OFF buttons a...

Page 105: ...matic pipe detection procedure starts 10 The procedure will run from five 5 to sixty 60 minutes depending on the number of connected indoor units and the ambient outdoor temperature 11 The number of indoor units detected is displayed for thirty 30 seconds to one 1 minute on the outdoor unit PCB after the outdoor unit stops The number of indoor units connected to each heat recovery unit will be dis...

Page 106: ...s to one 1 minute on the outdoor unit PCB after the outdoor unit stops Display error on outdoor unit PCB Display error on heat recovery unit PCB Outdoor unit PCB HR ĺ HR unit number ĺ Valve number Heat recovery unit 200 Check heat recovery and indoor units Pipe detection error occurs after thirty 30 seconds Check the pipe installation of the outdoor indoor and heat recovery units Auto pipe detecti...

Page 107: ...troller is not available a controller needs to be added 2 Turn No 1 of DIP switch bank SW02M of the heat recovery unit PCB ON 3 Reset the power of the heat recovery unit PCB 4 Through the heat recovery unit PCB manually set address of each heat recovery unit valve to the central control address of the indoor unit connected to that valve 5 Reset the power to the outdoor unit PCB 6 The number of the...

Page 108: ... 1 Operation None Display None 2 Operation Turn DIP switch No 1 on to address valve No 1 SW01M Display Existing value saved in EEPROM is displayed on SSD 3 Operation Set the 10 digit of the Group High data number of the wired remote control connected to the corresponding indoor unit to the valve No 1 by pressing left tack switch SW03M Display Digit increases with the number of times the tack switc...

Page 109: ...th FF Prerequisite for manual pipe detection The cen tral control address of each indoor unit must be preset differently using its wired remote control Example An indoor unit with a central control address of 11 is connected to valve no 1 of an heat recovery unit No Display Setup Description 1 Operation None Display None 2 Operation Turn DIP switch No 1 on to address valve No 1 Display Existing va...

Page 110: ... 1 Operation Turn DIP switch No 1 to ON Display 11 displays on SSD 2 Operation Turn DIP switch No 1 to OFF Display SSD is blank No Display Setup Description 1 Operation More than two 2 DIP switches turned ON Display SSD displays Er Identifying the Manual Valve Address Wait for eighty 80 seconds after power is turned ON Zoning and master indoor unit information are removed from EEPROM after auto ad...

Page 111: ...utomatic addressing Check confirm that there are no error messages displayed on the indoor units wired controllers or the outdoor unit s SSD s Test Run Checklist Table 58 Test Run Checklist Liquid Piping High Pressure Vapor Piping Low Pressure Vapor Piping Liquid Piping Vapor Piping Not Used Heat Recovery Systems Heat Pump Systems DANGER High voltage electricity is required to operate this system ...

Page 112: ...d outdoor unit heat exchanger Check the outdoor unit fan operation after the outdoor units have been turned off for a while If any obstacles are around the outdoor unit heat exchanger switch the outdoor unit OFF and remove Outdoor Unit EEV Heating failure frequent defrost Bad connector contact Check connector No operation sound after switching on the power Coil failure Check resistance between ter...

Page 113: ...essor s outdoor unit configuration agrees with the submittal information approved the design engineer see Tables below Confirm that this step has been completed The date is provided in sequence and segment of the sequence will remain lit for two 2 seconds Run Self Diagnostics Check Table 61 LVSOD RGH H QLWLRQV 9ROWDJH Sequence Description Code s 1 Master Outdoor Unit Nominal Capacity 8 14 2 Slave1...

Page 114: ...on Test 1 Ohm meter testing terminal to terminal on the compressor Test 2 Ohm meter testing terminal to pipe JURXQG 7KLV UHDGLQJ PXVW EH 0 1 The compressor stops and same error appears again Check if IPM has failed 2 Inverter output voltage is stable 1 Check insulation and coil resistors If both are normal restart the unit If the same error occurs again replace the compressor QVXODWLRQ UHVLVWRU 0ȍ...

Page 115: ...n error check the items below and follow the corresponding procedure listed Check Problem Solution 1 Fan motor is not operating Does fan motor fail again when opera tion starts 2 Fan motor vibration is exces sive Power supply is not correct Check wire connections at the breaker Modify the power supply voltage if it is beyond permissible specifications Wiring is wrong Check wiring connections Check...

Page 116: ...ge Blue Orange Yellow White Output Pulse Sequence 9DOYH FORVH VHTXHQFH ĺ ĺ ĺ ĺ 9DOYH RSHQ VHTXHQFH ĺ ĺ ĺ ĺ 1 If the EEV open position does not change output phase will be off 2 If the output phase is different or continuously on the motor will start vibrating EEV Valve Operation At power on open position signal is 2 000 pulses output and valve position is set to a see left When the valve operates ...

Page 117: ...LG is a registered trademark of LG Corp Lead Wire Coil Casing Casing Casing Assemble Remove Figure 53 EEV Coil and Casing Outdoor Unit Figure 54 Removing and Assembling the Coil Power off Tightly grip the casing and pull the coil up During assembly or when the coil is removed take care not to bend the casing pipe Checking the Electronic Expansion Valves continued CHECKING THE ELECTRONIC EXPANSION ...

Page 118: ...then operate another indoor unit in cooling mode 2 Check the liquid piping temperature of the indoor unit in fan mode through the outdoor unit control board 3 Check if the fan is rotating and the EEV is closed If there is a leak the liquid piping temperature at the indoor unit in fan mode will be low If the measured temperature is very low when compared to the suction temperature that is displayed...

Page 119: ...or Phase Diode Bridge R S T Figure 55 6LPSOL HG LDJUDP RI D 3KDVH LRGH Bridge Table 64 Checking the Phase Diode Bridge 2 Disconnect all connections to the three phase diode bridge 3 Set the multi tester to diode mode 4 Measured value must be 0 4V 0 7V as shown in table below 5 If the measured value is different than what is listed in the table below set the multi WHVWHU WR UHVLVWDQFH PRGH DQG PHDV...

Page 120: ...inal Black 0 2 0 6 V W Terminal Black 0 2 0 6 V Table 65 Checking the Inverter IGBT IPM 2 Disconnect all IGBT IPM connections 3 Set the multi tester to diode mode 4 Measured value must be 0 2 0 6 V as shown in the table below 5 If the measured value is different than what is listed in the table below then set the multi tester to resistance mode and measure DJDLQ I WKH YDOXH LV WRR ORZ ȍ RU WRR KLJ...

Page 121: ... 0ȍ 0ȍ Table 66 Checking the Fan IPM 2 Disconnect the DC and the U V W fan connectors 3 Set the multi tester to diode resistance mode 4 Measured value must be the same as shown below 5 If the measured value between the P and N terminals of the IPM LV ORZ ȍ WKH IDQ 3 QHHGV WR EH UHSODFHG EHFDXVH WKH 30 is damaged 6 If the measured value is different than what is listed in the tables the fan PCB nee...

Page 122: ...essure dropped due to a refrigerant leak Find the leak and repair it 2 If the difference between the high and low pressure outputs is around 14 22 psi the pressure sensor is normal 3 If the difference between the high and low pressure outputs is 14 22 psi the pressure sensor is damaged and needs to be replaced Figure 60 Pressure Sensor Output Characteristics See the pressure sensor schematic at le...

Page 123: ...nate ice that has accumulated on the heat exchanger recovering its performance 2 When the system is in partial defrost operation two 2 solenoid valves will turn on and off in sequence for six 6 minutes 3 The partial solenoid valves will turn off after partial defrost operation has ended Partial solenoid valve operation change can be checked by comparing the before and after temperatures of the byp...

Page 124: ...ng or heating mode touch the piping surface of the low pressure service valve 5 See diagram at right for the refrigerant flowchart of the four way reverse valve 6 QVXODWLRQ UHVLVWDQFH EHWZHHQ WKH IRXU ZD UHYHUVH YDOYH FRQQHFWLRQ DQG WKH FRLO PXVW EH 0ȍ PHDVXUH ZLWK D PHJD WHVWHU 500V Figure 62 Refrigerant Flowchart of the Four Way Reverse Valve Heating Operation Outdoor Heat Exchanger Outdoor Heat...

Page 125: ...s a tenth 10th time within the same one 1 hour the system shuts down permanently assigning the error to a Level 1 response that requires a manual restart The error code displays on the zone controllers and central controllers until the malfunction is fixed Level 2 Responses Level 2 responses are communications related errors only Level 2 responses activate after ten 10 attempts to communicate have...

Page 126: ...ween indoor units 0 8 Hydro kit hot water storage tank temperature sensor error Pipe temperature sensor disconnected shorted or opened 0 9 Indoor unit EEPROM error Communication error between the indoor unit PCB board and its RSWLRQ FDUG 7KH RSWLRQ FDUG LV DERXW ƍ ƍ DQG LV SOXJJHG LQWR WKH indoor unit PCB board Check connection between the two Communication error between EEPROM on indoor unit main...

Page 127: ...dro kit outlet pipe temperature sensor communica tion error Outlet pipe temperature sensor disconnected shorted or opened 2 3 0 Refrigerant leak sensor error Only displayed at the indoor unit and its wired remote controller Refrigerant leak sensor error sensor is malfunctioning Error will also be displayed if the function is enabled on the wired remote controller and there is not a sensor installe...

Page 128: ... 2 Low DC voltage sensed at the slave1 outdoor unit inverter compressor DC link 2 3 3 Low DC voltage sensed at the slave2 outdoor unit inverter compressor DC link 2 4 1 System has been turned off by the master outdoor unit high pressure switch Master outdoor unit high pressure switch error Check the connection on the outdoor unit PCB Use chart in Troubleshooting section of the manual to check sign...

Page 129: ...minute When operating in cooling mode Low side pressure 400 kPa for 1 minute High side pressure is 2 200 kPa Check for refrigerant leaks low refrigerant charge or a defective indoor unit EEV When operating in heating mode Low side pressure 230 kPa for 1 minute High side pressure is 1 800 kPa Check for refrigerant leaks low refrigerant charge or a defective outdoor unit EEV 3 5 2 Slave1 outdoor uni...

Page 130: ...the outdoor unit PCB Thermistor shorted or opened Defective outdoor unit PCB 4 7 2 Slave1 outdoor unit inverter compressor2 discharge temperature sensor error 4 7 3 Slave2 outdoor unit inverter compressor2 discharge temperature sensor error 4 9 1 Master outdoor unit IPM temperature sensor error Check the connection on the outdoor unit PCB Thermistor shorted or opened 4 9 2 Slave1 outdoor unit IPM ...

Page 131: ...3 Slave2 outdoor unit inverter PCB EEPROM error 6 2 1 High temperature at the master outdoor unit inverter heatsink System shut off because of high temperatures at the master outdoor unit inverter heatsink 6 2 2 High temperature at the slave1 outdoor unit inverter heatsink System shut off because of high temperatures at the slave1 outdoor unit inverter heatsink 6 2 3 High temperature at the slave2...

Page 132: ...ication error between master outdoor unit and slave outdoor units Master outdoor unit main PCB is not receiving signals from slave outdoor units 1 0 4 2 Communication error between slave1 outdoor unit and master and slave2 outdoor units Slave1 outdoor unit main PCB is not receiving signals from master and slave2 outdoor units 1 0 4 3 Communication error between slave2 outdoor unit and master and s...

Page 133: ...sconnected or shorted 1 4 5 1 Communication error between master outdoor unit main board and external board Master outdoor unit main board to external board communica tion failure 1 4 5 2 Communication error between slave1 outdoor unit main board and external board Slave1 outdoor unit main board to external board communica tion failure 1 4 5 3 Communication error between slave2 outdoor unit main b...

Page 134: ...Level 3 response Water outlet temperature sensor is disconnected or shorted 9DOXHV UHDG OHVV WKDQ RU JUHDWHU WKDQ OHVV WKDQ RU JUHDWHU WKDQ Prevents HEX from bursting from freezing when operating Does not protect HEX if the glycol is inadequate nor if the hydro kit is off and not operating Outdoor unit compressor ramps up and hydro kit operates One 1 minute later pipe temperature at mid temperatur...

Page 135: ...covery unit subcooling pipe inlet sensor 2 0 3 Heat recovery unit subcooling pipe outlet sensor HUURU HDW UHFRYHU XQLW HDW UHFRYHU XQLW number Disconnection or short circuit of heat recovery unit subcooling pipe outlet sensor 2 0 4 Communication error between outdoor unit and KHDW UHFRYHU XQLW HDW UHFRYHU XQLW HDW recovery unit number Outdoor unit does not receive signal from heat recovery unit 2 ...

Page 136: ...on the indoor unit PCB then check the thermistor 2 Hydro kit liquid side temperature sensor is disconnected or shorted Values read less than RU JUHDWHU WKDQ OHVV WKDQ RU JUHDWHU WKDQ 16 Hydro kit indoor unit water pipe temperature and ambient temperature sensor communication error Water inlet and outlet pipe temperature sensor disconnected shorted or opened 17 Hydro kit inlet pipe temperature sens...

Page 137: ...r code does not come back after several minutes the cable needs to be replaced Check the cable because the connection could be in error Check for cable extensions Check distances between the communication cable and main electrical wiring Ensure that the cable and wiring are at safe distances from one another to avoid being affected by electromagnetic waves 3 After replacing the indoor unit PCB per...

Page 138: ...rror 2 Improper drain pipe location clogged drain pipe 3 Indoor unit PCB error Is the drain pan filled half way with water Float is halfway up to the float switch Remove any debris and clean the pump Replace the float switch No Yes Yes Is the drain pump operating Sound drain noise contact etc Is the drain pump clogged Yes Is the float switch resistance short when measured Replace the indoor unit P...

Page 139: ...r more detail to prevent injury or death regarding the operation and service troubleshooting of the Multi V product WARNING Standard Drain Pipe Height Slope 1 50 1 100 inches Maximum 27 1 2 inches Maximum 11 13 16 inches Error No 04 continued Indoor PCB Drain Pump Connector Check Electrical Input Marked as CN DPUMP Float A Point to Check Rotation Float Switch Housing CN FLOAT Images here are repre...

Page 140: ...rly There is a problem with the main power supply Yes No Yes No Outdoor unit PCB is malfunctioning Check then replace Reconnect communication cable No Yes Indoor unit PCB is malfunctioning Check then replace Communication from the indoor unit is normal if voltage fluctuation 9V 9V exists when checking DC voltage of the communication terminal between the indoor and outdoor units After auto addressi...

Page 141: ...ding the operation and service troubleshooting of the Multi V product WARNING Error No Description Details Causes 09 Indoor unit EEPROM error Serial number on EEPROM of indoor unit is 0 or FFFFFF Communication error between MICOM and EEPROM Indoor unit PCB EE PROM is in error or data is not available 1 Error developed in transmission between the microproces sor and the EEPROM on the indoor unit PC...

Page 142: ...ed removed or malfunctioned 2 Indoor fan motor lock has failed 3 Indoor PCB error Is the connection installed properly Yes No Connect properly Is fan motor operating normally Replace indoor unit fan motor The indoor unit fan motor hall sensor is operating normally when the values measured are as shown below Yes No k Replace indoor unit PCB Checking the Fan Motor Connections 1 4 5 6 7 1 5 6 7 4 4 4...

Page 143: ...rough 1 above Heat transfer paste at the heat sink is required For instructions see Replacing the Inverter PCB Heat Sink page later in this section Middle Bracket Middle Bracket Screw Heat Sink Assembly Figure 65 Removingthe Control Box Cover Figure 66 Removing the Middle Bracket Screws Figure 67 Detaching the Mounting Screws Figure 68 Disconnecting the Compressor and Power Input Wiring Figure 69 ...

Page 144: ...ct No Yes 1 Check R L1 S L2 T L3 wiring connections ĺ Rewire if errors are found No Check if Inverter PCB assembly IPM are operating properly ĺ Replace Inverter PCB assembly if errors are found No 1 Check Inverter PCB assembly and U V W connections 2 Check wiring for any disconnections or damage 3 Check compressor terminal connections for bad contacts ĺ Reassemble if errors are found 1 Check Inver...

Page 145: ...d system type Cause Check Checklist App Check Point Normal Abnormal Defective Parts Under Voltage 15V 15V Voltage Measurement Inverter connector Voltage 14 5V 15 5V 9 Ļ Inverter PCB A2 Power ON Inverter PCB Damaged Check Inverter PCB appearance Appearance Good Damage Inverter PCB B1 Power Off Measure 5V 15V line 5V 15V Resistance N Ĺ N Ļ a IGBTM Check IGBT P U V W N U V W 0 38V 0 7V Non normal Inv...

Page 146: ...EOH LI HUURUV DUH IRXQG UH WKH QYHUWHU 3 DVVHPEO bridge diode connections correct No KHFN EULGJH GLRGH LQ QYHUWHU 3 70 ĺ 5HDVVHPEO LI HUURUV DUH IRXQG Yes V WKH LQSXW YROWDJH QRUPDO No Check 5a6 6a7 7a5 SKDVH YROWDJH LV ZLWKLQ ĺ KHFN FRQQHFWLRQV DQG ZLULQJ LI SRZHU LV LQFRUUHFW Yes V WKH QYHUWHU 3 DVVHPEO correct No KHFN IRU QYHUWHU 3 DVVHPEO 30 HUURUV ĺ 5HSODFH QYHUWHU 3 assembly UH WKH UHVLVWDQF...

Page 147: ... ERROR CODES Please refer to the Safety Precautions on pages 4 7 for more detail to prevent injury or death regarding the operation and service troubleshooting of the Multi V product WARNING Measure resistance between compressor terminals Compressor wiring connections Measure input voltage Error No 22 continued Images here are representative of system components Actual component appearance depends...

Page 148: ... 4 Damaged electrical condenser component serving capacitor on inverter driver board Check DC link connections DC Link Connector Measure input voltage Images here are representative of system components Actual compo nent appearance depends on model and system type Cause Check Checklist App Check Point Normal Abnormal Defective Parts Input Voltage Abnormal Check Input Voltage Voltage 3P3W 220V 220V...

Page 149: ...ring heating mode 8 Service valve is clogged 9 Outdoor unit PCB is defective 10 Check connection on the outdoor unit PCB 11 Active path valve is defective 12 Use chart in Troubleshooting section of the manual to check signal output V DC versus actual pressure Is the high pressure switch connected to the PCB No Securely connect Has the high pressure switch shorted out when the system wasn t operati...

Page 150: ...as an input voltage of 180V or 253V for 208 230V units or an input voltage of 414V or 528V for 460V units 1 Input voltage is abnormal 2 Outdoor unit inverter PCB assembly is damaged input voltage sensor compo nent Does the Inverter PCB LED display an error Recheck power and installation Yes Is the input voltage normal Yes Replace Inverter PCB assembly Yes Yes No Are the power wiring connections co...

Page 151: ...e blocked 3 Check if EEV is operating normally and the connections are cor rect 4 Check the refrigerant pressure ĺ 5HLQVWDOO RU IL LI HUURUV DUH IRXQG No Yes Yes Are the power wiring connections correct Is the resistance be tween each phase and the Inverter compressor insulation resistance correct Yes No No 1 Check the resistance between each compressor terminal 2 Check insulation resistance betwe...

Page 152: ...appearance depends on model and system type Table 80 Error No 26 Checkpoint Details Cause Check Checklist App Check Point Normal Abnormal Defective Parts Inverter PCB Damaged Check Inverter PCB appearance Appearance Good Damage Inverter PCB B1 Power Off Measure 5V 15V line 5V 15V Resistance N Ĺ N Ļ a IGBTM Check IGBT P U V W N U V W 0 38V 0 7V Non normal Inverter Drive Circuit Check diode Diode 0 ...

Page 153: ...ween each phase and the inverter compressor insulation resistance correct No No Are the compressor wiring connections correct Yes No Yes No Is the input voltage normal Is the compressor PCB assembly correct Yes Check if Inverter compressor PCB assembly and IPM are correct ĺ 5HSODFH QYHUWHU FRPSUHVVRU 3 DVVHPEO LI HUURUV DUH IRXQG Check if R S S T T R phase voltage is 180V or 253V for 208 230V unit...

Page 154: ...rk of LG Corp ERROR CODES Please refer to the Safety Precautions on pages 4 7 for more detail to prevent injury or death regarding the operation and service troubleshooting of the Multi V product WARNING Error No 29 continued Measure resistance between compressor terminals Compressor wiring connections Measure input voltage Images here are representative of system components Actual component appea...

Page 155: ...rter compressor discharge piping temperature sensor 3 Refrigerant is leaking or there is under charge 4 Defective EEV 5 Defective liquid spray valve 33 Master 331 Slave 1 332 Slave 2 333 Excessive in crease in outdoor unit inverter compressor2 gas discharge temperature System compressor shut off because of a high discharge temperature at the outdoor unit inverter compressor2 No Yes Is the discharg...

Page 156: ... Refrigerant pipe is damaged 6 Defective indoor and or outdoor unit EEV 7 Outdoor unit is blocked during cooling or indoor unit filter is blocked during heating 8 Service valve is clogged 9 Defective outdoor unit PCB 10 Defective indoor unit pipe temperature 11 Defective indoor unit pipe temperature sensor 12 Defective hot gas valve Is the service valve open No Open the service valve Are the commu...

Page 157: ... charge or a defective outdoor unit EEV 4 Defective low pressure sensor 5 Defective indoor unit or outdoor unit fan 6 Refrigerant piping is damaged 7 The outdoor unit is blocked dirty coil in heating and or the indoor unit filter is blocked plugged in cooling 8 Service valve is clogged 9 Defective outdoor unit PCB 10 Defective indoor unit pipe temperature sensor Is the service valve open Open the ...

Page 158: ...6 for 2 to 5 minutes following a change in position of the reversing valve either direction If compression ratio is 1 6 delay 5 minutes for condition to correct itself before raising the error 2 During low ambient cooling operation following an initial compressor start if compression ratio is 1 1 for 2 minutes if compression ratio is 1 3 for 3 minutes 3 Check bypass between high and low pressure s...

Page 159: ... detection CT sensor MICOM input voltage is not within 2 5V 0 3V at initial power up 1 Input voltage is not correct T S 2 Damaged DC power component DC 5V 3 Outdoor unit inverter PCB is damaged CT sensor component Are the power wiring connec tions correct Recheck power and installation 1 Check R L1 S L2 T L3 wiring connec tions 2 Check noise filter wiring connections ĺ 5HZLUH LI HUURUV DUH IRXQG N...

Page 160: ...ely low temperatures with no low ambient kit 2 Compressor discharge pipe temperature sensor TH3 is not installed or connected properly 3 Defective compressor discharge pipe sen sor TH3 opened or shorted 4 Defective outdoor unit PCB 47 Inverter Compressor2 Master 471 Slave 1 472 Slave 2 473 Error Nos 41 and 47 UURU LV JHQHUDWHG LI UHVLVWDQFH LV 0ȍ RSHQ DQG Nȍ VKRUW Standard values of sensor resista...

Page 161: ...tween 12 V and GND red to black for 5 V DC 4 Check the Signal to GND white to black and use correct chart from Troubleshooting section to compare with actual system pressure 43 Master 431 Slave 1 432 Slave 2 433 Outdoor unit high pressure sensor error Disconnection or short circuit of outdoor unit high pressure sensor Pressure sensor connectors High pressure sensor Low pressure sensor Images here ...

Page 162: ...t PCB 2 Thermistor shorted or opened 3 Check suction sensor in cooling mode check hot gas sensor located near the heat exchanger in heating mode 49 Master 491 Slave 1 492 Slave 2 493 Outdoor unit IGBT IPM temperature sensor error Disconnection or short circuit of outdoor unit IGBT IPM temperature sensor 1 Check the connection on the outdoor unit PCB 2 Thermistor shorted or opened Error No Descript...

Page 163: ...ensor error Error No 50 Are the power wiring con nections correct Recheck power and installation Check R L1 S L2 T L3 wiring connections ĺ 5HZLUH LI HUURUV DUH IRXQG No Yes Yes Is the input voltage normal Is the main PCB assembly correct Yes No No Check if R S S T T R phase voltage is 208 230V 10 or in the range of 414 528V for 460V ĺ KHFN ZLULQJ IRU GDPDJH DQG FRQQHFWLRQV LI power is not correct ...

Page 164: ... PCB 6 Failed Master outdoor unit main PCB can also cause this error if it could not see the slave outdoor unit Is the total indoor unit capacity 130 of the outdoor unit capacity on the LGMV report No Yes Check if the DIP switches below are set to ON Slave 1 No 6 Slave 2 No 7 No Reset corresponding DIP switches Yes Is the power to the Slave PCB On see if LED is blinking Yes Nso Quantity and capaci...

Page 165: ...t branch capacity specifica tions After auto pipe detection is complete wait 5 minutes then verify connected capacity Total indoor unit capacity is 54 000 Btu h for each heat recovery unit branch pipe 1 Heat recovery unit port addresses are all unique then total indoor unit capacity is 54 000 Btu h per each heat recovery unit branch pipe 2 Total indoor units connected to each heat recovery unit br...

Page 166: ...essor con troller PCB s 1 Power wiring or communication cable is disconnected 2 Defective outdoor unit main fuse noise filter 3 Defective outdoor unit main inverter PCB s Is the yellow commu nication LED for either the compressor1 or compressor2 PCB on Replace the PCB on either compressor1 or compressor2 Is the noise filter or Inverter PCB s line fuse normal No Yes Is the main PCB functioning norm...

Page 167: ... Abnormal Check 15V Voltage Inverter connector Voltage 14 5V 15 5V 9 Ļ SMPS PCB A2 Power ON Check 5V Voltage Inverter connector Voltage 4 5V 5 5V 9 Ļ Inverter PCB Damaged Check Inverter PCB Appearance Appearance Good Damage Inverter PCB B1 Power Off Measure 5V 15V line 5V 15V Resistance N Ĺ N Ļ a IGBTM Check IGBT P U V W N U V W 0 38V 0 7V Non normal Inverter Drive circuit Check diode Diode 0 38V ...

Page 168: ...munication cable connection error 5 Power to the indoor PCB is off 6 Defective outdoor unit main PCB communi cation PCB and or indoor unit PCB 7 Outdoor unit main PCB indoor unit PCB is defective or damaged Is the power supplied to the indoor unit PCB Check communication cable and installation 1 Check the communication cable between outdoor unit external PCB and indoor unit PCB Reconnect communica...

Page 169: ...r units but the outdoor unit still shows CH53 check the communication count line on LGMV Find the indoor unit that does not have a communication count increase that indicates the indoor unit which is not communicating The indoor unit may have 1 Wrong communication cable or power wiring connection s 2 A PCB malfunction 3 Duplicate address numbers for indoor units Error No 53 will appear at the indo...

Page 170: ... Outdoor unit inverter PCB is not receiving signal from main PCB 1 Bad connection between main and inverter PCBs 2 Communication wire noise effect 3 The outdoor unit main PCB is damaged 4 The outdoor unit inverter PCB is damaged Are the communi cation cable connections correct Recheck power and installation 1 Check communication wiring 2 Check connections ĺ 5HZLUH LI HUURUV DUH IRXQG No Yes After ...

Page 171: ...or EEPROM access and Check SUM errors 1 EEPROM contact is defective or the con tact is not inserted correctly 2 Different EEPROM version 3 Outdoor unit inverter PCB assembly is damaged Is EEPROM insertion correct Recheck power and installation 1 Check EEPROM insertion connection 2 Check EEPROM check SUM ĺ 5HSODFH LI HUURUV DUH IRXQG No Yes Is the inverter PCB assembly correct Replace inverter PCB ...

Page 172: ...ant Check Inverter PCB Connection Installation Images here are representative of system components Actual component appearance depends on model and system type Is the installation correct 1 Check piping for clogs or damage 2 Check if the outdoor unit or indoor unit air flow is blocked 3 Check EEV connections assembly or if the EEV is operating normally 4 Check refrigerant pressure 5 Check power wi...

Page 173: ...pe condens er temperature sensor error Abnormal sensor resistance value 1 Defective temperature sensor connection 2 Defective temperature sensor sensor has opened or shorted 3 Defective outdoor unit PCB Are the temperature sensor connections correct Check and connect sensor to PCB No Yes Replace outdoor unit PCB Is the value of the temperature sensor resistance normal Replace sensor No Yes I WKH Y...

Page 174: ...ect Check outdoor unit fan motor assembly ĺ 5HDVVHPEOH RU UHSODFH LI HUURUV DUH IRXQG No Yes Are the outdoor unit fan motor wiring connections correct Yes No Check wiring between outdoor unit fan motor and fan PCB Check if the motor output terminal colors match ĺ 5HDVVHPEOH LI HUURUV DUH IRXQG Is the outdoor unit fan motor operating normally 1 Check resistance between each phase U V W of the outdo...

Page 175: ...sor error MICOM input voltage isn t within 2 5V 0 3V at initial power up 1 Input voltage is not correct R T 2 Damage to the outdoor unit converter PCB CT sensor component Are the power wiring connections correct 1 Check R S T N wiring connections 2 Check noise filer wiring connections ĺ 5HZLUH LI SUREOHPV DUH IRXQG No Yes Is the converter PCB assembly correct No Is the input voltage normal 1 Check...

Page 176: ...2 753 Fan CT sensor error Offset of MICOM fan motor phase current is not 2 5V 0 3V 1 Input voltage is not correct not 15V 2 Fan PCB assembly is defective 3 Power wiring has disconnected or has shorted 4 Inverter PCB assembly is defective Is the input voltage normal Check 15V input power wiring connections ĺ 5HZLUH RU UHFRQQHFW LI HUURUV DUH IRXQG No Yes After power is reset does the error still oc...

Page 177: ...SODFH LI HUURUV DUH IRXQG No Yes Are the motor wire con nections correct No The resistance between each phase and the insulation resistance of the motor output terminal correct No Yes Recheck power and installation 1 Check if the color of the motor output terminal U V W connec tions match the PCB connections 2 Check if the wiring has disconnected or has been damaged ĺ 5HDVVHPEOH RU UHSODFH LI HUUR...

Page 178: ... fan motor assembly is correct or if it is locking up ĺ 5HDVVHPEOH RU UHSODFH LI HUURUV DUH IRXQG No Yes Are the fan motor connections correct No The resistance between each phase and the insulation resistance of the motor output terminal correct 1 Check the resistance between each motor output terminal 2 Check insulation resistance between the outdoor unit fan motor termi nals U V W and the pipe ...

Page 179: ...DES Please refer to the Safety Precautions on pages 4 7 for more detail to prevent injury or death regarding the operation and service troubleshooting of the Multi V product WARNING Error No 79 continued Measure fan motor phase resistance Check connections Measure insulation resistance between fan terminal and chassis Images here are representative of system com ponents Actual component appearance...

Page 180: ...s Causes 86 Master 861 Slave 1 862 Slave 2 863 Outdoor unit main PCB onboard EEPROM error EEPROM access error 1 No EEPROM 2 EEPROM is not inserted properly Is the EEPROM assembled correctly Reset after checking the EEPROM assembly No Yes Is the check sum correct No Recheck power and installation Replace with correct EEPROM Yes Inserting the EEPROM Both the socket opening and the EEPROM opening mus...

Page 181: ... power is supplied 1 EEPROM has a bad connection or was inserted incorrectly 2 Version of EEPROM is different 3 Outdoor unit fan PCB assembly may have been damaged after power was turned on Error No 87 Is the EEPROM inserted correctly 1 Check EEPROM connection 2 Check EEPROM check sum ĺ 5HSODFH 3520 LI HUURUV DUH IRXQG No Yes Is the fan PCB assembly correct No Recheck power and installation Replac...

Page 182: ...g communication cable connections are loose Connections have disconnected or have shorted out 2 Outdoor unit main PCB is defective Error No 104 Is the communication cable installed correctly Connect communication cable No Yes Is are the slave outdoor unit s DIP switch setting s correct No Replace main PCB Check the DIP switch settings and change if necessary Yes Is the main PCB power on Yes No Con...

Page 183: ...ged Check 5V Voltage Comm 5V Voltage 4 5V 5 5V 9 Ļ SMPS PCB A4 Power On Check Resistance of Communication IC Resistance N Ĺ N Ļ a Main PCB B4 Power Off External PCB Damaged Check whether patterns in external PCB are connected Resistance Ļ Open External PCB Table 82 Error No 104 Improper Connections Checkpoint Details ERROR CODES Please refer to the Safety Precautions on pages 4 7 for more detail t...

Page 184: ... the operation and service troubleshooting of the Multi V product WARNING Error No 104 continued Figure 77 Checking Error No CH104 from External PCB Figure 78 Checking Error No CH104 from Harness 51 7 51 7 7 7 0 0 4 4 0 8 51 7 51 7 7 7 A 10 pin harness for connecting Main PCB with External PCB Test all pins on both sides to see if short Normally short Table 84 Error No 104 External PCB Checkpoint ...

Page 185: ...inverter 2 terminals on the main PCB is below 13 5 V DC Is the fan PCB commu nication LED yellow blinking normally Check communication cable between inverter compressor PCB and fan PCB ĺ 5HFRQQHFW RU UHSODFH ZLULQJ LI HUURUV DUH IRXQG No Yes Is the inverter compressor PCB communication LED yellow blinking normally No Recheck power and installation Yes Is the fan PCB assembly correct Yes No Check f...

Page 186: ...inued Table 85 Error No 105 Checkpoint Details Cause Check Checklist App Check Point Normal Abnormal Defective Parts Fan PCB Damaged Check Fan PCB Appearance Appearance Good Damage Fan PCB B3 Power Off Check Fuse Fuse Short Open Measure 5V 15V line 5V 15V Resistance N Ĺ N Ļ a IPM Check IGBT P U V W N U V W 0 38V 0 7V Non normal Inverter Drive circuit Check diode Diode 0 38V 0 7V Non normal Inverte...

Page 187: ...terminals on the main PCB is below 13 5 V DC Is the fan motor assembly correct Check the outdoor unit fan motor assembly is it locking up ĺ 5HDVVHPEOH RU UHSODFH LI HUURUV DUH IRXQG No Yes Are the fan motor wiring connections correct No Recheck power and installation 1 Check fan motor U V W connections ĺ 5HDVVHPEOH ZLULQJ LI HUURUV DUH IRXQG 2 Check if fan motor wiring has disconnected ĺ 5HSODFH R...

Page 188: ...etail to prevent injury or death regarding the operation and service troubleshooting of the Multi V product WARNING Error No 106 continued Table 86 Error No 106 Checkpoint Details Cause Check Checklist App Check Point Normal Abnormal Defective Parts Fan PCB Damaged Check Fan PCB Appearance Appearance Good Damage Fan PCB B3 Power Off Check Fuse Fuse Short Open Measure 5V 15V line 5V 15V Resistance ...

Page 189: ...r the voltage at the capacitor is out of range low Start di agnosis at the inverter socket on the outdoor unit noise filter PCB 1 Wiring is not installed correctly between the inverter PCB and the fan PCB 2 Fan PCB assembly is defective 3 Reactor terminal contact is defective 4 DC link terminal wiring and or contact is defective disconnected 5 Diode bridge is defective 6 Damaged electrical condens...

Page 190: ... 3 Defective outdoor unit PCB 114 Master 1141 Slave 1 1142 Slave 2 1143 Outdoor unit subcooling inlet temperature sensor error Disconnection or short circuit of outdoor unit subcooling inlet temperature sensor sensor value is abnormal 115 Master 1151 Slave 1 1152 Slave 2 1153 Outdoor unit subcooling outlet temperature sensor error Disconnection or short circuit of outdoor unit subcooling outlet te...

Page 191: ...r 1451 Slave 1 1452 Slave 2 1453 Communication error between outdoor unit main PCB and external PCB Cycle controller of outdoor unit PCB is not receiving signal from the external PCB 1 Power wiring and or communication cables is are not connected 2 Outdoor cycle controller external PCB is are defective Is the yellow communica tion LED of the external PCB on Re connect power wiring No Yes Is the co...

Page 192: ...system time to stabilize if the superheat again falls 4 8 F 3ºC for 5 minutes the system will shut down and auto restart for a second time If error occurs 3 times within any 1 hour period of compressor oper ation the error code will be assigned a Level 3 and the system will shut down and remain off A manual restart will be necessary After at least 10 minutes of compressor operation the master outd...

Page 193: ... 3 Defective four way valve resistance is not ȍ Is the four way valve con nected properly Reconnect the four way valve No Yes Is the four way valve coil resistance normal ȍ No Change the four way valve coil Yes Is the four way valve coil connected to the four way valve correctly Yes No Re insert four way valve coil If there are more than two outdoor units does the master outdoor unit recognize all...

Page 194: ...ase refer to the Safety Precautions on pages 4 7 for more detail to prevent injury or death regarding the operation and service troubleshooting of the Multi V product WARNING Error No 151 continued Location of the four way valve connector on the Main PCB marked as 4way CN09 Confirm the four way valve coil is completely inserted Measure the four way valve resistance Check the output voltage of the ...

Page 195: ...m 3 View the difference between the high pressure and low pressure with LGMV for each outdoor unit Master Slave 1 Slave 2 4 If there is an outdoor unit in which the difference between high pressure and low pressure did not increase then the four way valve of that outdoor unit is defective and must be replaced Sequence Description Code s 1 Master Outdoor Unit Nominal Capacity 8 14 2 Slave1 Outdoor ...

Page 196: ...nt injury or death regarding the operation and service troubleshooting of the Multi V product WARNING Error No Description Details Causes 182 Master 1821 Slave 1 1822 Slave 2 1823 Communication error between outdoor unit main and sub MICOMs of the external PCBs Outdoor unit main and sub MICOM communication failure Failure to receive signal between main and sub MICOMs Error No 182 Is the yellow com...

Page 197: ...ve 1 1872 Slave 2 1873 Hydro kit P HEX error P equals prevents from freezing Hydro kit error 1 Inlet water temperature is 5 C 41 F Raise error code Level 3 response 2 Water outlet temperature sensor is disconnected or shorted Values UHDG OHVV WKDQ RU JUHDWHU WKDQ OHVV WKDQ RU JUHDWHU WKDQ 3 Prevents HEX from bursting from freezing when operating Does not protect HEX if the glycol is inadequate nor...

Page 198: ...ctly 3 Outdoor unit fan PCB assembly is defective 4 Overload operation piping is clogged fan is blocked EEV is defective overcharge in refrigerant Has the system been installed correctly 1 Check if any pipes are clogged or damaged 2 Check if the outdoor or indoor unit fans are blocked 3 Check EEV assembly if it is connected or is operating normally 4 Check refrigerant pressure 5 Check power wiring...

Page 199: ...ve 1 1942 Slave 2 1943 Outdoor unit fan heatsink tempera ture sensor error Disconnection or short circuit of outdoor unit fan heatsink temperature sensor 1 Check sensor connection 2 Sensor is shorted or open 3 Defective outdoor unit PCB Are the temperature sensor connections correct Check and fix connections No Yes Is the temperature sensor resistance value normal No Replace outdoor unit PCB Repla...

Page 200: ...tch is not set correctly 3 The indoor unit connected on the heat recovery unit port exceeds the allowable capacity limit 1 Check if the communication cable and piping between the heat recovery unit s and the indoor unit s installed correctly 2 Check if the DIP switches are set correctly for each connection condition between the heat recovery unit s and the indoor unit s 3 I WKH LQGRRU XQLW FRQQHFW...

Page 201: ... the input power of the heat recovery unit 5HVHW SRZHU WR WKH RXWGRRU XQLW DQG KHDW UHFRYHU XQLW ZDLW IRU WKLUW PLQXWHV VR WKH SLSLQJ WHPSHUDWXUH ZLOO FRRO GRZQ DQG WKHQ perform the auto addressing procedure While the power to the heat recovery unit is on check if error code CH05 is displayed see troubleshooting instructions for Error No CH05 3 If the green communication LED of the heat recovery u...

Page 202: ...sconnected or has shorted out 3 Defective outdoor unit PCB 1R RI Heat Recovery Unit Heat recovery unit subcooling inlet piping tempera ture sensor error 1R RI Heat Recovery Unit Heat recovery unit subcooling discharge piping temperature sensor error Error Nos 201C 202C 203C 1 Check the connections of the temperature sensor and the lead cable 2 V WKH YDOXH RI WHPSHUDWXUH VHQVRU QRUPDO I QRW UHSODFH...

Page 203: ...reen communication LED of the heat recovery unit PCB is not blinking on continuously check if the communication of the total indoor units is normal See Error No 05 If the green communication LED of the heat recovery unit PCB is not blinking on continuously and even if communication to the indoor unit is functioning replace the heat recovery unit PCB High voltage electricity is required to operate ...

Page 204: ...rate of 9 600 bps The 485 modem is the communications style on the bus that is 1e outdoor unit to many indoor units 1 Communication problem occurred between the heat recovery unit PCB and the connec tion to the communications bus the heat recovery unit 485 modem 2 Error displays if the outdoor unit signal is not received for three 3 minutes The error clears after the signal is received from the mo...

Page 205: ...ecovery units with one or more HEX addresses that are the same 3 Adjust the HEX address dial found on the heat recovery units error of the rotary switch address settings on the heat recov ery unit 4 The power wiring and or the communica tion cable connection of the heat recovery unit is defective 5 The heat recovery unit PCB is defective Error No 206 C 1 Check if the rotary switch settings on each...

Page 206: ...uto addressing has occurred 2 Check communication cable 3 Check outdoor unit communication mod ule See also Error Code No 05 Indoor Unit PCB Communication Error between Outdoor Unit and Indoor Unit and Error Code No 238 Outdoor Unit PCB Communication Error Between Indoor Unit and Outdoor Unit Is the outdoor unit powered Turn on power to the outdoor unit No Yes Has the auto address ing procedure be...

Page 207: ...s PCB is not receiv ing signal from outdoor unit communications PCB for more than 3 minutes Check outdoor unit PCB communications for issues 1 Check if the outdoor unit has been powered and if auto addressing has occurred 2 Check communication cable 3 Check outdoor unit PCB Is the outdoor unit powered Turn on power to the outdoor unit No Yes Has the auto address ing procedure been per formed No Pe...

Page 208: ...efect between remote controller and indoor unit 3 RS 485 DIP switch setting error 4 Indoor unit addressing setting error on central controller Is the communications cable of the RS 485 properly connected Reconnect RS 485 communications cable No Yes Are any indoor unit addresses repeated No Recheck power and installation Reset any indoor unit addresses that are repeated Is the simple central con tr...

Page 209: ...LW KHDW VLQN SODWH WKH unit will overheat and damage the PCB and outdoor unit 1 Remove inverter PCB by detaching its screws using a JIS screwdriver Only use a JIS screwdriver A standard Phillips screwdriver will damage strip the inverter PCB screw heads 2 Wipe off any existing heat sink paste material from the inverter PCB heat sink plate as well as from the outdoor unit heat sink plate Gently scr...

Page 210: ... 4 7 for more detail to prevent injury or death regarding the operation and service troubleshooting of the Multi V product WARNING KHFNLQJ QSXW 9ROWDJH 7KUHH 3KDVH 7KUHH LUH Terminal Inverter PCB R S T R S T 220V 460V Inverter PCB R S T R S T Terminal Red Black Figure 79 Checking Input Voltage Figure 80 Multi Meter Check Mode Multi Meter Measured Value Black Red Normal Abnormal Input Voltage 3 Pha...

Page 211: ...mm 1 2 3 4 5 6 GND1 5V Main Ext 2 1 4 3 6 5 8 7 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 23 24 25 26 27 28 GND2 5V Table 91 Main PCB DC Voltage SMPS Voltage Measurements Check Mode Multi Meter Measured Value Black Red Normal Abnormal Main Ext 5V DC GND2 5V 4 5V 5 5V 9 Ļ 12V 12V 11 5V 12 5V 9 Ļ Comm 5V GND3 5V 4 5V 5 5V 9 Ļ 12V 12V 11 5V 12 5V 9 Ļ Use caution when measuring the voltage GND is...

Page 212: ...igure 83 Checking Converter DC Link Voltage Red Black Figure 84 Multi Meter Note the Probe Color One Compressor P N Two Compressors P N Check Mode Multi Meter Measured Value Black Red Normal Abnormal DC Link Voltage 3 Phase 3 Wire 220V DC N P 310V 20 9Ļ 9Ĺ 3 Phase 3 Wire 460V N P 650V 20 9Ļ 9Ĺ Table 92 Converter DC Link Voltage Measurements Please refer to the Safety Precautions on pages 4 7 for m...

Page 213: ...nit Red Black Figure 86 Multi Meter Note the Probe Color Multi V 5 2 1 4 3 6 5 8 7 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 23 24 25 26 27 28 Comm Connector White GND3 pin2 GND3 pin2 5V pin1 Check Mode Multi Meter Measured Value Black Red Normal Abnormal Main DC Comm DC GND3 pin2 5V pin1 4 5V 5 5V 9Ļ Table 93 ODU to ODU Communications DC Voltage Measurements Please refer to the Safety Precau...

Page 214: ... Precautions on pages 4 7 for more detail to prevent injury or death regarding the operation and service troubleshooting of the Multi V product WARNING Figure 87 Checking Inverter PCB Red Black Figure 88 Multi Meter N R S T U V W P W BLACK RED Check Mode Multi Meter Measured Value Black Red Normal Abnormal 5V Part Resistance ȍ GND 5V N Ĺ N Ļ a 15V Part Resistance ȍ GND 15V N Ĺ N Ļ a IGBTM P UVW U ...

Page 215: ... trademark of LG Corp POWER SYSTEM WIRING DIAGRAMS Figure 89 Power Wiring Diagram Three phase 220V Figure 90 Power Wiring Diagram Three phase 460V Noise Filter Inverter Fan Main External 3Phase 220V 1Phase 220V 485 Comm Module 15V 5V GND1 12V 5V GND2 12V 5V GND3 DC 310V Noise Filter Inverter Fan Main External Trans 3Phase 460V 1Phase 460V 1Phase 220V 485 Comm Module 15V 5V GND1 12V 5V GND2 12V 5V ...

Page 216: ...erved LG is a registered trademark of LG Corp PCB LOCATIONS UX B Outdoor Unit Control Box Front View UX A Outdoor Unit Control Box Back View Main PCB External PCB Terminal Block Noise Filter Inverter PCB Fan PCB Main PCB External PCB Terminal Block Inverter PCB Fan PCB UX A Outdoor Unit Control Box Noise Filter Back View Main PCB External PCB Inverter PCB Noise Filter Fan PCB IDU ODU Communication...

Page 217: ...fs NJ All rights reserved LG is a registered trademark of LG Corp OUTDOOR UNIT PARTS PCBs Main PCB CN_OPT_01 03 CN_COMM DP1 CN_INPUT CN_HP_SW DP1 CN_PIPE_COMM CN_DEBUG CN_INV CN_EXT CN_COMMR CN_EXT JIG1 2 CN_FLASH CN_LGMV CN_FLASH SW01D SW01C SW02C SW03C SW04D Actual component appearances may differ depending on manufacturing date model system type etc ...

Page 218: ..._BL CN40_EEV1_H_RD CN41_EEV2_L_WH CN42_SC_EEV_BL CN44_VI_EEV1_OR CN45_VI_EEV2_BR CN36_TEMP1_GR CN37_TEMP2_YL CN38_TEMP3_VI CN39_TEMP4_BK CN09_OIL_C1_YL CN08_OIL_C2_BR CN34_P_H_RD CN33_P_L_BL CN32_HUMID_BK CN31_SNOW_WH CN10_AC_IN_WH CN25_BASEPAN_BK CN23_INJ_SUC_GY CN21_RCV_OUT_GR CN19_HEX_H_WH CN17_OILBAL2_OR CN15_4WAY2_BR CN12_SUMP_C2_YL CN13_ACC_OIL_WH CN28_HP_SW_GY CN11_SUMP_C1_BL CN14_4WAY1_BK ...

Page 219: ...gistered trademark of LG Corp OUTDOOR UNIT PARTS PCBs Inverter PCB for 208 230V Outdoor Units 17kW CN_AC_OUT_BK CN_AC_IN_BK CN_FAN_15V_BK CN_COMM_OUT_BL CN_COMM_IN_RD CN_LGMV_YL CN_FLASH_RD CN_DEB_WH CN_INPUT_VOLT_T CN_INPUT_VOLT_S CN_INPUT_VOLT_R CN_INPUT_VOLT_R CN_INPUT_VOLT_R CN_INPUT_VOLT_R Actual component appearances may differ depending on manufacturing date model system type etc ...

Page 220: ...erved LG is a registered trademark of LG Corp CN_AC_OUT_BK CN_AC_IN_BK CN_FAN_15V_BK CN_COMM_OUT_BL CN_COMM_IN_RD CN_LGMV_YL CN_FLASH_RD CN_DEB_WH CN_INPUT_VOLT_T CN_INPUT_VOLT_S CN_INPUT_VOLT_R CN_INPUT_VOLT_R CN_INPUT_VOLT_R CN_INPUT_VOLT_R Inverter PCB for 208 230V Outdoor Units 12kW PCBs OUTDOOR UNIT PARTS Actual component appearances may differ depending on manufacturing date model system typ...

Page 221: ...registered trademark of LG Corp Inverter PCB for 460V Outdoor Units 17kW PCBs OUTDOOR UNIT PARTS CN_INPUT_VOLT_T CN_INPUT_VOLT_S CN_INPUT_VOLT_R CN_INPUT_VOLT_R CN_INPUT_VOLT_R CN_INPUT_VOLT_R CN_AC_OUT_BK CN_AC_IN_BK CN_COMM_OUT_BL CN_COMM_IN_RD CN_FAN_15V_BK CN_DEB_WH CN_FLASH_RD CN_LGMV_YL Actual component appearances may differ depending on manufacturing date model system type etc ...

Page 222: ...eserved LG is a registered trademark of LG Corp Inverter PCB for 460V Outdoor Units 12kW PCBs OUTDOOR UNIT PARTS CN_INPUT_VOLT_T CN_INPUT_VOLT_S CN_INPUT_VOLT_R CN_INPUT_VOLT_R CN_INPUT_VOLT_R CN_INPUT_VOLT_R CN_AC_OUT_BK CN_AC_IN_BK CN_COMM_OUT_BL CN_COMM_IN_RD CN_FAN_15V_BK CN_DEB_WH CN_FLASH_RD CN_LGMV_YL Actual component appearances may differ depending on manufacturing date model system type ...

Page 223: ...onics U S A Inc Englewood Cliffs NJ All rights reserved LG is a registered trademark of LG Corp PCBs OUTDOOR UNIT PARTS Fan PCB CN_DCLINK_YL CN_FAN2_UVW_RD CN_FAN1_UVW_RD CN_COMM_OUT_WH CN_INV_BK CN_JTAG_RD CN_FLASH_RD CN_LGMV_YL Actual component appearances may differ depending on manufacturing date model system type etc ...

Page 224: ... All rights reserved LG is a registered trademark of LG Corp PCB OUTDOOR UNIT PARTS Noise Filter PCB for 208 230V Outdoor Units 17kW Noise Filter PCB for 208 230V Outdoor Units 12kW CN_INV_T CN_INV_S CN_INV_R CN_INV_T CN_INV_S CN_INV_R CN1 CN_INV_T CN_INV_S CN_INV_R CN_INV_T CN_INV_S CN_INV_R CN1 Actual component appearances may differ depending on manufacturing date model system type etc ...

Page 225: ...ts reserved LG is a registered trademark of LG Corp PCBs OUTDOOR UNIT PARTS Noise Filter PCB for 460V Outdoor Units 17kW Noise Filter PCB for 460V Outdoor Units 12kW CN_INV_T CN_INV_S CN_INV_R CN_INV_T CN_INV_S CN_INV_R CN_INV_T CN_INV_S CN_INV_R CN_INV_T CN_INV_S CN_INV_R Actual component appearances may differ depending on manufacturing date model system type etc ...

Page 226: ...White White Single Harness W6631D Fan PCB to Inverter PCB DC Link Yellow Yellow Single Harness W6631E Main PCB to External PCB Communication Cable Blue Blue Single Harness W6631F Main PCB to External PCB Power Wiring White White Single Harness W6631G Main PCB to Inverter PCB Communication Cable White to Blue Single Harness W6631H 208 230V Outdoor Units Only Noise Filter PCB to Main PCB Power Wirin...

Page 227: ...White White Single Harness W6631D Fan PCB to Inverter PCB DC Link Yellow Yellow Single Harness W6631E Main PCB to External PCB Communication Cable Blue Blue Single Harness W6631F Main PCB to External PCB Power Wiring White White Single Harness W6631G Main PCB to Inverter PCB Communication Cable White to Blue Single Harness W6631H 208 230V Outdoor Units Only Noise Filter PCB to Main PCB Power Wirin...

Page 228: ...ess W6631D Fan PCB to Inverter PCB DC Link Yellow Yellow Single Harness W6631E Main PCB to External PCB Communication Cable Blue Blue Single Harness W6631F Main PCB to External PCB Power Wiring White White Single Harness W6631G Main PCB to Inverter PCB Communication Cable White to Blue Single Harness W6631H 208 230V Outdoor Units Only Noise Filter PCB to Main PCB Power Wiring Black Black Single Ha...

Page 229: ...or 6 Ton Small Frame Outdoor Units 237203 135303 435512 148000A 137213A 237204A 148000A W4986A Soundproof for Compressor W4986B 148000A 137213B 237204B 148000A 559010 546810 149980 W4810C W4810B 135500D 435511 554031 430411 Base Pan 147780 Base Leg 430410 Base Assembly 135500A 135500B 237202 437211 135500C Expanded Frame View OUTDOOR UNIT PARTS Actual component appearances may differ depending on ...

Page 230: ... 8 and 10 Ton Large Frame Outdoor Units Expanded Frame View OUTDOOR UNIT PARTS 148000A 137213A 237204A 148000A 435512 W4986A Soundproof for Compressor W4986B 148000A 237204B 137213B 148000A 237203 135303 549990 Shroud Assembly 135500A 135500C 437211 148000 135500B 237202 147780 Base Leg 430410 Base Assembly 430411 Base Pan 435511 149980 559010 546810 135500D W4810C 554031 W4810B Actual component a...

Page 231: ...e Outdoor Units Expanded Frame View OUTDOOR UNIT PARTS 148000A 137213A 237204A 148000A 435512 W4986A Soundproof for Compressor 1 Compressor 2 W4986B 148000A 237204B 137213B 148000A 237203 135303 549990 Shroud Assembly 135500A 135500C 437211 148000 135500B 237202 147780 Base Leg 430410 Base Assembly 430411 Base Pan 435511 149980 559010 546810 135500D W4810C 554031 W4810B Actual component appearance...

Page 232: ... 552204G 352111B 552200 661400B 550140 W48602 Compressor 1 Oil Level Sensor Compressor 1 Sump Heater 554160A 552204B 561410C 548490 552203C W49810C 552203C 552203A 552116 165000B 566001 552202 561410L 165000A 552202 561410G 265021 Coil Type Part No Description Color Temperature Sensor 1 263230A 6XE RRO 2XW HDW FKDQJHU 8SSHU 7HPSHUDWXUH 6HQVRU LTXLG 3LSH Yellow Temperature Sensor 2 263230B 6XFWLRQ ...

Page 233: ...1410F 552209C 552209B 552209A 552201E 552204G 561410E 552204A 561410A 561410B 352111B 165000B 552202 561410G 165000A 552200 661400B 548490A 550140 W48602 554160A 552204B 561410C 548490 552203C W49810C 552203B 552203A Coil Coil Coil 552204B 561410D Coil 265021 Type Part No Description Color Temperature Sensor 1 263230A 6XE RRO 2XW HDW FKDQJHU 8SSHU 7HPSHUDWXUH 6HQVRU LTXLG 3LSH Yellow Temperature S...

Page 234: ...A 552201D 148000C 552209D 552209C 552204D 561410F 552202A 561410L 566001 165000A 265021 165000B 552202B 561410G 552200 661400B 552209B 552209A 552201E 552204G 561410E Coil 552204A 561410A 561410B Coil Coil Coil Coil Coil Coil Coil Coil Coil Coil Coil Compressor 1 Oil Level Sensor Compressor 1 Sump Heater Compressor 2 Oil Level Sensor Compressor 2 Sump Heater Type Part No Description Color Temperat...

Page 235: ...tion Center Commercial Products 1 888 865 3026 USA Follow the prompts for commercial A C products 20001747 ISO 9001 2008 LG ELECTRONICS INC To access additional technical documentation such as submittals indoor unit engineering manuals installation product data performance general best practice and building ventilation manuals as well as white papers catalogs LATS software programs and more visit ...

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