LG CT18F NQ0 User Manual

Part 4 Trouble Shooting
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All rights reserved. Only training and service purposes.
UUA1 UUB1
UUD1/UUD3
UUC1
1.2 Error Indicator (Outdoor)
1 Time 1 Time 1 Time
2 Times2 Times2 Times
1 second
2 seconds 2 seconds
1 second 1 second
LED01G
(RED)
LED02G
(GREEN)
Standard Inverter : 18k
Compact Inverter : 24k/30k
2.5 seconds
1 second 1 second 2.5 seconds
LED 1
(RED)
1 second
(ex) Code 21)
UUC1/UUD1
UUA1/UUB1
Code Contents
Operation
State
Count
44 Outdoor Inlet Sensor Error Stop
1 time
Within 1h
45 Cond. Pipe Sensor Error Stop
1 time
Within 1h
46 Suction Pipe Sensor Error Stop
1 time
Within 1h
47
D-Pipe Sensor Error
(Constantrate Comp)
Stop
1 time
Within 1h
51 Over-Capacity Connection Error Stop
1 time
Within 1h
53
Communication Error between
Outdoor Device Indoor Device
Stop
1 time
Within 1h
54 Open and Reverse Phase Error Stop
10 time
Within 1h
60 EEPROM Check Sum Error Stop
1 time
Within 1h
61
Outdoor Device Pipe
Overheating Error
Stop
Infinite
restart
62 Heat-sink Overheating Error Stop
Infinite
restart
65 Heat-sink Sensor Error Stop
1 time
Within 1h
67 Outdoor BLDC Fan Lock Error Stop
10 time
Within 1h
73 PSC/PFC Over-Current Error(SW) Stop
Infinite
restart
Code Contents
Operation
State
Count
21 IPM Fault Error Stop 10 time Within 1h
22 CT 2 Error (Input of Over-Current) Stop Infinite restart
23 DC Link Error (High/Low DC Voltage) Stop Infinite restart
24 Pressure Switch High/Low Pressure Fault Stop 10 time Within 1h
25 Input Frequency Detection Failure Stop 1 time Within 1h
26 DC Comp Position Detection Error Stop 10 time Within 1h
27 PSC/PFC Over-Current Error(HW) Stop 10 time Within 1h
29 Comp Phase Over-Current Error Stop 10 time Within 1h
32 D-Pipe Overheating Error (INV Comp) Stop Infinite restart
33
D-Pipe Overheating Error
(Constant-rate Comp)
Stop Infinite restart
35 Low Pressure Error of Outdoor Unit Stop 6 time Within 1h
38 Refrigerant Leakage Error Stop 4 time Within 1h
41 D-Pipe Sensor Error (INV. Comp.) Stop 1 time Within 1h
43 High pressure Sensor Error Stop 1 time Within 1h
Outdoor Error

LG CT18F NQ0 Specifications

General

Brand	LG
Model	CT18F NQ0
Category	Air Conditioner
Language	English