LG VRF Error Codes – Multi V



Error Codes;

  • Indicate different types of unit failures, assist in self-diagnosis and to track the frequency of occurrence.
  • Error codes are shown on the LED of indoor units, wired remote controller, the outdoor unit control board, and on the main screen of the LG Monitoring View (LGMV) Diagnostic Software.
  • If two or more errors occur simultaneously, the lower error code number is displayed first.
  • After error is resolved, the error code does not display.

Error Display;

The first, second, and third number on the LED indicates error number; the fourth number on LED indicates outdoor unit number.

Examples: 211 = Error No. 21 on master unit, 213 = Error No. 21 on slave2 unit, Error No. 105 on master unit on compressor 1.




Error Code Nomenclature Definitions;

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

 

LG Multi V Error Code
LG Multi V Error Codes
Error CodesDescription
01Indoor unit return air or optional remote wall temperature sensor communications error
02Indoor unit inlet pipe temperature sensor communication error
03Communication error between zone controller and indoor unit
04Condensate float switch error
05Communication error between outdoor unit and indoor unit
06Indoor unit outlet pipe temperature sensor error
07Indoor units are not operating in the same mode
09Indoor unit EPROM error
10Indoor unit BLDC fan motor communications error
211Master outdoor unit inverter compressor PCB error
212Slave1 outdoor unit inverter compressor PCB error
213Slave2 outdoor unit inverter compressor PCB error
221Master outdoor unit inverter board input overcurrent (RMS) error
222Slave1 outdoor unit inverter board input overcurrent (RMS) error
223Slave2 outdoor unit inverter board input overcurrent (RMS) error
231Low DC voltage sensed at the master outdoor unit inverter compressor DC link
232Low voltage to the slave1 outdoor unit inverter compressor DC link
233Low voltage to the slave2 outdoor unit inverter compressor DC link
241Master outdoor unit high pressure switch error
242Slave1 outdoor unit high pressure switch error
243Slave2 outdoor unit high pressure switch error
251Input voltage to the master outdoor unit is too high or too low
252Input voltage to the slave1 outdoor unit is too high or too low
253Input voltage to the slave2 outdoor unit is too high or too low
261Master outdoor unit inverter compressor operation error
262Slave1 outdoor unit inverter compressor operation error
263Slave2 outdoor unit inverter compressor operation error
281Master outdoor unit inverter DC link high voltage error
282Slave1 outdoor unit inverter DC link high voltage error

 

LG Multi V Indoor Units Types Error Codes

Error Code: 283

Description: Slave2 outdoor unit inverter DC link high voltage error

Error Code: 291

Description: Master outdoor unit inverter compressor overcurrent error

Error Code: 292

Description: Slave1 outdoor unit inverter compressor overcurrent error

Error Code: 293

Description: Slave2 outdoor unit inverter compressor overcurrent error




Error Code: 321

Description: Excessive increase in master outdoor unit inverter com- pressor1 gas discharge temperature

Error Code: 322

Description: Excessive increase in slave1 outdoor unit inverter com- pressor1 gas discharge temperature

Error Code: 323

Description: Excessive increase in slave2 outdoor unit inverter com- pressor1 gas discharge temperature

Error Code: 331

Description: Excessive increase in master outdoor unit inverter com- pressor2 gas discharge temperature

Error Code: 332

Description: Excessive increase in slave1 outdoor unit inverter com- pressor2 gas discharge temperature

Error Code: 333

Description: Excessive increase in slave2 outdoor unit inverter com- pressor2 gas discharge temperature

Error Code: 341

Description: Master outdoor unit compressor high pressure safety tripped

Error Code: 342



Description: Slave1 outdoor unit compressor high pressure safety tripped

Error Code: 343

Description: Slave2 outdoor unit compressor high pressure safety tripped

Error Code: 351

Description: Master outdoor unit low side pressure transducer sens- es pressure below allowable limits

Error Code: 352

Description: Slave1 outdoor unit low side pressure transducer sens- es pressure below allowable limits

Error Code: 353

Description: Slave1 outdoor unit low side pressure transducer sens- es pressure below allowable limits

Error Code: 361

Description: Master outdoor unit fell below low condenser (compression) ratio limit

Error Code: 362

Description: Slave1 outdoor unit fell below low condenser (compression) ratio limit

Error Code: 363

Description: Slave2 outdoor unit fell below low condenser (com- pression) ratio limit

Error Code: 401

Description: Master outdoor unit inverter compressor current trans- ducer (CT) sensor error

Error Code: 402

Description: Slave1 outdoor unit inverter compressor current trans- ducer (CT) sensor error

Error Code: 403

Description: Slave2 outdoor unit inverter compressor current trans- ducer (CT) sensor error

Error Code: 411

Description: Master outdoor unit inverter compressor1 discharge pipe temperature sensor error

Error Code: 412

Description: Slave1 outdoor unit inverter compressor1 discharge pipe temperature sensor error



Error Code: 413

Description: Slave2 outdoor unit inverter compressor1 discharge pipe temperature sensor error.

Error Code: 421

Description: Master outdoor unit low pressure transducer error

Error Code: 422

Description: Slave1 outdoor unit low pressure transducer error

Error Code: 423

Description: Slave2 outdoor unit low pressure transducer error

Error Code: 431

Description: Master outdoor unit high pressure transducer error

Error Code: 432

Description: Slave1 outdoor unit high pressure transducer error

Error Code: 433

Description: Slave2 outdoor unit high pressure transducer error

Error Code: 441

Description: Master outdoor unit ambient temperature sensor error

Error Code: 442

Description: Slave1 outdoor unit ambient temperature sensor error

Error Code: 443

Description: Slave2 outdoor unit ambient temperature sensor error

Error Code: 451

Description: Master outdoor unit heat exchanger pipe temperature sensor (front side, TH_HEX2) error

Error Code: 452

Description: Slave1 outdoor unit heat exchanger pipe temperature sensor (front side, TH_HEX2) error

Error Code: 453

Description: Slave2 outdoor unit heat exchanger pipe temperature sensor (front side, TH_HEX2) error

Error Code: 461

Description: Master outdoor unit suction pipe temperature sensor error

Error Code: 462

Description: Slave1 outdoor unit suction pipe temperature sensor error




Error Code: 463

Description: Slave2 outdoor unit suction pipe temperature sensor error

Error Code: 471

Description: Master outdoor unit inverter compressor2 discharge temperature sensor error

Error Code: 472

Description: Slave1 outdoor unit inverter compressor2 discharge temperature sensor error

Error Code: 473

Description: Slave2 outdoor unit inverter compressor2 discharge temperature sensor error

Error Code: 491

Description: Master outdoor unit IPM temperature sensor error

Error Code: 492

Description: Slave1 outdoor unit IPM temperature sensor error

Error Code: 493

Description: Slave2 outdoor unit IPM temperature sensor error

LG Multi V Outdoor Units Types Error Codes

Error Code: 501

Description: Master outdoor unit three-phase power is not connected properly

Error Code: 502

Description: Slave1 outdoor unit three-phase power is not connected properly

Error Code: 503

Description: Slave2 outdoor unit three-phase power is not connected properly



Error Code: 511

Description: Combination ratio is out of range

Error Code: 512

Description: Total indoor unit capacity exceeds allowable heat recovery unit branch capacity

Error Code: 521

Description: Communication error between master outdoor unit inverter PCB and main PCB

Error Code: 522

Description: Communication error between slave1 outdoor unit inverter PCB and main PCB

Error Code: 523

Description: Communication error between slave2 outdoor unit inverter PCB and main PCB

Error Code: 531

Description: Communication error between outdoor unit main PCB and indoor unit(s) PCB

Error Code: 541

Description: Master outdoor unit power error

Error Code: 542

Description: Slave1 outdoor unit power error

Error Code: 543

Description: Slave2 outdoor unit power error

Error Code: 571

Description: Master outdoor unit main PCB and inverter PCB communication error

Error Code: 572

Description: Slave1 outdoor unit main PCB and inverter PCB communication error

Error Code: 573

Description: Slave2 outdoor unit main PCB and inverter PCB communication error

Error Code: 591

Description: Outdoor unit series installation error

Error Code: 601

Description: Master outdoor unit inverter PCB EPROM error

Error Code: 602

Description: Slave1 outdoor unit inverter PCB EPROM error

Error Code: 603

Description: Slave2 outdoor unit inverter PCB EPROM error

Error Code: 621

Description: High temperature at the master outdoor unit inverter heatsink

Error Code: 622




Description: High temperature at the slave1 outdoor unit inverter heatsink

Error Code: 623

Description: High temperature at the slave2 outdoor unit inverter heatsink

Error Code: 651

Description: Master outdoor unit inverter heatsink temperature sensor error

Error Code: 652

Description: Slave1 outdoor unit inverter heatsink temperature sensor error

Error Code: 653

Description: Slave2 outdoor unit inverter heatsink temperature sensor error

Error Code: 671

Description: Master outdoor unit fan has locked up

Error Code: 672

Description: Slave1 outdoor unit fan has locked up

Error Code: 673

Description: Slave2 outdoor unit fan has locked up

Error Code: 711

Description: Master outdoor unit converter CT sensor error

Error Code: 712

Description: Slave1 outdoor unit converter CT sensor error

Error Code: 713

Description: Slave2 outdoor unit converter CT sensor error

Error Code: 751

Description: Master outdoor unit fan CT sensor error

Error Code: 752

Description: Slave1 outdoor unit fan CT sensor error

Error Code: 753

Description: Slave2 outdoor unit fan CT sensor error

Error Code: 761

Description: Master outdoor unit fan DC link high voltage error

Error Code: 762

Description: Slave1 outdoor unit fan DC link high voltage error

Error Code: 763

Description: Slave2 outdoor unit fan DC link high voltage error

Error Code: 771

Description: Master outdoor unit fan overcurrent error




Error Code: 772

Description: Slave1 outdoor unit fan overcurrent error

Error Code: 773

Description: Slave2 outdoor unit fan overcurrent error

Error Code: 791

Description: Master outdoor unit fan operation failure error

Error Code: 792

Description: Slave1 outdoor unit fan operation failure error

Error Code: 793

Description: Slave2 outdoor unit fan operation failure error

Error Code: 861

Description: Master outdoor unit main PCB onboard EPROM error

Error Code: 862

Description: Slave1 outdoor unit main PCB onboard EPROM error

Error Code: 863

Description: Slave2 outdoor unit main PCB onboard EPROM error

Error Code: 871

Description: Master outdoor unit fan PCB EPROM error

Error Code: 872

Description: Slave1 outdoor unit fan PCB EPROM error

Error Code: 873

Description: Slave2 outdoor unit fan PCB EPROM error

Error Code: 1041

Description: Communication error between master outdoor unit and slave outdoor units

Error Code: 1042

Description: Communication error between slave1 outdoor unit and master and slave2 outdoor units

Error Code: 1043

Description: Communication error between slave2 outdoor unit and master and slave1 outdoor units

Error Code: 1051

Description: Master outdoor unit fan PCB to compressor PCB communication error




Error Code: 1052

Description: Slave1 outdoor unit fan PCB to compressor PCB communication error

Error Code: 1053

Description: Slave2 outdoor unit fan PCB to compressor PCB communication error

Error Code: 1061

Description: Master outdoor unit fan IPM error

Error Code: 1062

Description: Slave1 outdoor unit fan IPM error

Error Code: 1063

Description: Slave2 outdoor unit fan IPM error

LG VRF Error Codes
LG VRF Error Codes

Error Code: 1071

Description: Master outdoor unit fan DC link low voltage error

Error Code: 1072

Description: Slave1 outdoor unit fan DC link low voltage error

Error Code: 1073

Description: Slave2 outdoor unit fan DC link low voltage error

Error Code: 1131

Description: Master outdoor unit liquid pipe temperature sensor error

Error Code: 1132

Description: Slave1 outdoor unit liquid pipe temperature sensor error

Error Code: 1133

Description: Slave2 outdoor unit liquid pipe temperature sensor error

Error Code: 1141

Description: Master outdoor unit subcooling inlet temperature sensor error

Error Code: 1142

Description: Slave1 outdoor unit subcooling inlet temperature sensor error

Error Code: 1143

Description: Slave2 outdoor unit subcooling inlet temperature sensor error

Error Code: 1151

Description: Master outdoor unit subcooling outlet temperature sensor error

Error Code: 1152

Description: Slave1 outdoor unit subcooling outlet temperature sensor error

Error Code: 1153

Description: Slave2 outdoor unit subcooling outlet temperature sensor error

Error Code: 1161

Description: Master outdoor unit oil level sensor error

Error Code: 1162

Description: Slave1 outdoor unit oil level sensor error

Error Code: 1163

Description: Slave2 outdoor unit oil level sensor error




Error Code: 1451

Description: Communication error between master outdoor unit main board and external board

Error Code: 1452

Description: Communication error between slave1 outdoor unit main board and external board

Error Code: 1453

Description: Communication error between slave2 outdoor unit main board and external board

Error Code: 1511

Description: Master outdoor unit operation mode conversion error

Error Code: 1512

Description: Slave1 outdoor unit operation mode conversion error

Error Code: 1513

Description: Slave2 outdoor unit operation mode conversion error

Error Code: 1531

Description: Master outdoor unit upper heat exchanger temperature sensor error

Error Code: 1532

Description: Slave1 outdoor unit upper heat exchanger temperature sensor error

Error Code: 1533

Description: Slave2 outdoor unit upper heat exchanger temperature sensor error

Error Code: 1541

Description: Master outdoor unit lower heat exchanger temperature sensor error

Error Code: 1542

Description: Slave1 outdoor unit lower heat exchanger temperature sensor error

Error Code: 1543

Description: Slave2 outdoor unit lower heat exchanger tempera- ture sensor error

Error Code: 1821

Description: Communication error between master outdoor unit external board main and sub MICOMs

Error Code: 1822

Description: Communication error between slave1 outdoor unit external board main and sub MICOMs

Error Code: 1823

Description: Communication error between slave2 outdoor unit external board main and sub MICOMs

Error Code: 1931

Description: Excessive increase in master outdoor unit fan heatsink temperature

Error Code: 1932

Description: Excessive increase in slave1 outdoor unit fan heat- sink temperature

Error Code: 1933

Description: Excessive increase in slave2 outdoor unit fan heat- sink temperature

Error Code: 1941

Description: Master outdoor unit fan heatsink temperature sensor error

Error Code: 1942

Description: Slave1 outdoor unit fan heatsink temperature sensor error

Error Code: 1943

Description: Slave2 outdoor unit fan heatsink temperature sensor error

Error Code: 2001

Description: Valve addressing error

Error Code: 2011

Description: Heat recovery unit liquid sensor error.

Error Code: 2021

Description: Heat recovery unit subcooling pipe inlet sensor error

Error Code: 2031

Description: Heat recovery unit subcooling pipe outlet sensor error




Error Code: 2041

Description: Communication error between outdoor unit and heat recovery unit

Error Code: 2051

Description: Communication error between heat recovery unit and the 485 modem

Error Code: 2061

Description: Duplicate address error of the heat recovery unit

Error Code: 51

Description: Capacity of indoor units connected to the heat recovery unit exceeds allowable limits

Note: To use open line 485 communication (9,600 bps communication), you need to use a product that is compatible with all of the “Generation 4” versions of the indoor units, heat recovery units, outdoor units, and accessories.


Q&A

-Error Code: CH50

Description: Outdoor unit three-phase power is not connected properly.

Details: One or more of R(L1), S(L2), T(L3) input power line connections is / are missing for the outdoor unit.

Causes:
1. Input voltage is not correct R(L1), S(L2), T(L3).
2. Power line connections may not be correct.
3. Main PCB may be damaged.
4. Inverter PCB input current sensor error.

LG Multi V Service Manual PDF

 

LG AC Error Codes and Troubleshooting

 




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