LG Multi V CRUN Series User Manual

Self-diagnosis function
Service Manual 219
3. Self-diagnosis function
Error Indicator
• The function is to self-diagnose airconditioner and indicate the problems, if any.
• Error mark is displayed on display window of indoor units and wired remote controller, and 7-segment 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.
Display Title Cause of Error
0
0
0
0
0
0
0
0
0
1
2
3
4
5
6
7
8
9
2
2
2
2
2
1
2
3
4
5
3
3
3
3
3
1
2
3
4
5
Indoor unit air sensor
Indoor unit sensor(inlet pipe)
Wired remote control ↔ indoor
unit transmission
Drain pump
Outdoor unit ↔ indoor unit trans-
mission
Indoor unit outlet pipe sensor
The other operation mode
Not in use
Serial No. Error
DC peak
Max CT
DC link
High pressure
Low/Over voltage
Not in use
Discharge temperature
(inverter compressor)
Discharge temperature
(constant speed compressor)
High pressure
Low pressure
Indoor unit air sensor open or short
Indoor unit inlet pipe sensor open or short
In the case that indoor unit can not receive any signal
from wired remote control successively for 3 minutes
Malfunction of drain pump
In the case that indoor unit can not receive any signal
from outdoor unit successively for 3 minutes
Indoor unit outlet pipe sensor open or short
In the case that an indoor unit is operated the other
operation mode different from the operated indoor unit
Not in use
In the case that the serial number marked on
EEPROM of indoor unit is 0 or FFFFFF
IPM over temperature or compressor malfunction is
occurred 3 times in 1 hour
When current detection is over the maximum current
limit
DC charging is not performed for 45 sec after starting
relay turn on
Compressor is OFF 3 times in 1 hour due to high pressure
Input voltage is out of tolerance of rating voltage
Not in use
Due to over rising of inverter compressor discharge tem-
perature, Compressor off is occurred 3 times in 1 hour
Due to over rising of constant speed compressor dis-
charge temperature, Compressor off is occurred 3
times in 1 hour
Due to high pressure, Compressor off is occurred 3
times in 1 hour
Due to low pressure, Compressor off is occurred 3
times in 1 hour
Indoor unit related error
Power related error
Compressor related error

LG Multi V CRUN Series Specifications

General

Brand	LG
Model	Multi V CRUN Series
Category	Air Conditioner
Language	English