LG AHNW166T0 - Page 71

Test Run
Installation Manual 71
ENGLISH
Error Indicator
• This function indicates types of failure in self-diagnosis and occurrence of failure for air condition.
• Error mark is displayed on display window of indoor units and wired remote controller, and 7-seg-
ment LED of outdoor unit control board as shown in the table.
• If more than two troubles occur simultaneously, lower number of error code is first displayed.
• After error occurrence, if error is released, error LED is also released simultaneously.
Error Display
1st,2nd LED of 7-segment indicates error number, 3rd LED indicates unit number.
2) Outdoor Unit
Error No. Error Type Main Reasons
Outdoor unit related error (CH)
211
Inverter compressor IPM defect
Inverter compressor drive IPM defect /
inverter compressor defect
221
Inverter compressor over current Increase of inverter compressor CT value
231
Inverter compressor DC Link low
voltage
After inverter activation relay is ON, DC
voltage recharge defect
241
Outdoor Unit High Pressure Switch
System is turned off by outdoor unit high
pressure switch.
251
High/low Inverter input voltage
Inverter input voltage exceeds the unit limit
and lasts for 4 s (173V ~ 289V)
261
Inverter compressor activation
failure
Inverter compressor error, causing initial
activation failure
271
Inverter PSC/PFC Fault Error Error by overcurrent at inverter input
281
Inverter DC Link high voltage error
Inverter DC voltage recharge, causing
compressor OFF
291
Inverter compressor overcurrent
Inverter compressor activation failure or
increase of CT value
321
Excessive rise of inverter compres-
sor discharge temperature
Excessive rise of inverter compressor dis-
charge temperature, causing compressor
OFF
341
Excessive rise of high pressure of
inverter compressor
Excessive rise of high pressure of inverter
compressor, causing compressor OFF
351
Excessive drop of low pressure of
inverter compressor
Excessive drop of low pressure of inverter
compressor, causing compressor OFF
361
Low pressure ratio error of inverter
compressor
High pressure/low pressure ratio of inverter
compressor is maintained at below 1.8 for 3
min. or more
401
Inverter compresso’r CT sensor defect Inverter compressor CT sensor defect
411
Inverter compressor discharge pipe
temperature sensor defect
Inverter compressor discharge temperature
sensor disconnection or short circuit
421
Low pressure sensor defect of
inverter compressor
Low pressure sensor disconnection or short
circuit of inverter compressor
431
High pressure sensor defect of
inverter compressor
High pressure sensor disconnection or short
circuit of inverter compressor
441
Inverter inside air temperature
sensor defect
Inverter inside air temperature sensor
disconnection or short circuit
451
Outdoor Unit Heat Exchanger
Temperature Sensor Fault
Outdoor Unit Heat Exchanger Temperature
Sensor Open or Short