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MULTI V S System Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
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Outdoor Unit
Error Code 'HVFULSWLRQ 'HWDLOV
2 1 1 Outdoor unit inverter compressor PCB error.
• Outdoor unit inverter compressor PCB error.
• Under voltage
• 5HIULJHUDQWÀRZUHVWULFWLRQIURPGHIHFWLYH/(9
• Refrigerant charge is too high (overcharge).
221
2XWGRRUXQLWLQYHUWHUERDUGLQSXWRYHUFXUUHQW506
error.
• Overcurrent of outdoor unit inverter board PCB.
• Under voltage
• 5HIULJHUDQWÀRZUHVWULFWLRQIURPGHIHFWLYH/(9
• Refrigerant charge is too high (overcharged).
231
Low DC voltage sensed at the outdoor unit inverter
compressor DC link.
DC voltage failed to charge on power up. (Start diagnosis at the
CN inverter socket on the outdoor unit noise filter PCB.)
2 4 1 Outdoor unit high pressure switch error.
System has been turned off by the outdoor unit high pressure
switch.
2 5 1 Input voltage to the outdoor unit is too high or too low.
OXWGRRUXQLWKDVDQLQSXWYROWDJHRI9RU9IRU9
units).
2 6 1 Outdoor unit inverter compressor operation error.
Initial operation failure due to outdoor unit inverter compressor
problem.
281Outdoor unit inverter DC link high voltage error.
Compressor shut off because outdoor unit inverter PCB DC link
voltage is too high.
2 9 1 Outdoor unit inverter compressor overcurrent error. Outdoor unit inverter compressor current draw is too high.
321
Excessive increase in outdoor unit inverter compressor
gas discharge temperature.
• Shutdown due to excessive discharge gas temperature.
• Check the fan and coils.
3 4 1 Outdoor unit compressor high pressure safety tripped.
• Shutdown due to excessive discharge gas temperature.
• Check the fan and coils.
351
Outdoor unit low side pressure transducer senses pres-
sure below allowable limits.
• Shutdown due to low suction pressure.
361
Outdoor unit fell below low condenser (compression)
ratio limit.
Outdoor unit remained below the low condenser ratio limit for
three (3) minutes.
401
Outdoor unit inverter compressor current transducer
(CT) sensor error.
Outdoor unit inverter compressor current transducer (CT) detec-
tion sensor has disconnected or short circuited.
411
Outdoor unit inverter compressor discharge pipe tem-
perature sensor error.
• Check the connection at the socket on the outdoor unit PCB.
• Thermistor has disconnected or short circuited.
4 2 1 Outdoor unit low pressure transducer error.
• Check the connection at the socket on the outdoor unit PCB.
• Transducer has disconnected or short circuited.
4 3 1 Outdoor unit high pressure transducer error.
• Check the connection at the socket on the outdoor unit PCB.
• Transducer has disconnected or short circuited.
4 4 1 Outdoor unit ambient temperature sensor error.
• Check the connection at the socket on the outdoor unit PCB.
• Thermistor has disconnected or short circuited.
451
Outdoor unit heat exchanger pipe temperature sensor
(front side) error.
• Check suction sensor in cooling mode; check hot gas sensor
located near the heat exchanger in heating mode.
• Check the connection at the socket on the outdoor unit PCB,
then check if thermistor is open or shorted.
• Thermistor has disconnected or short circuited.
4 6 1 Outdoor unit suction pipe temperature sensor error.
• Check the connection at the socket on the outdoor unit PCB.
• Thermistor has disconnected or short circuited.
4912XWGRRUXQLW,30WHPSHUDWXUHVHQVRUHUURU
'LVFRQQHFWLRQRUVKRUWFLUFXLWRIRXWGRRUXQLW,30
temperature sensor.
5 1 1 Combination ratio is out of range.
The total of the nominal indoor unit capacity is less than 50% or
more than 130% of the nominal outdoor unit capacity.
Table 47: Outdoor Unit Error Codes.
For detailed information on how to troubleshoot each error, see the Multi V S Service Manual on www.lg-vrf.com.
ERROR CODE TABLES
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