LG air conditioner error codes

Modern systems of the LG firm adjusting a temperature mode in premises are rather complex constructively. An error of any LG air conditioner can lead to the malfunctions, the removal of which will come at a high cost. Therefore, all the air conditioners are fit with a self-diagnostics device capable to block, in a case of faults, the operation of an air conditioner and show an error code on an internal block. These error codes can be decoded with help of the table below.

LG AMNW07GDBL1 air error codes

Error Code Contents LED01G/M (Red) LED02G/M (Green) case of Error Outdoor Status
21 DC Link Peak (IPM Fault) 2times 3 1 times 3 Over Rated Current Off
22 CT 2 (Max CT) 2times 3 Input Over Current
23 DC Link Low Volt.
DC Link High Volt.
3times 3 DC Link Volt is below 140Vdc
DC Link Volt is above 420Vdc
25 Low Voltage/Over Voltage 5times 3 Abnormal AC Volt Input
26 DC Compressor Position Error 6times 3 Compressor Starting Fall Error
27 PSC/PFC Fault Error 7times 3 Over Inverter PCB input current
29 COMP Over Current 9times 3 Over Inverter Compressor Current
32 D-Pipe High 3times 3 2times 3 D-Pipe Temp. High
35 Low Pressure Error 5times 3 Excessive decrease of Low Pressure
39 Communication Error 9times 3 Communication Error Between PFC Micom and INV Micom
40 CT Sensor (Open/Short) 4times 3 o CT Circuit Malfunction
41 INV. D-Pipe Th Error 1 times 3 Open/Short
43 High Pressure Sensor Error 3times 3
44 Outdoor Air Th Error 4times 3
45 Cond. Mid-Pipe Th Error 5times 3
46 Suction Pipe Th Error 6times 3
48 Cond. Out-Pipe Th Error 8times 3
51 Capacity Over 5times 3 1 times 3 Over combination
53 Signal Error (Indoor <-> Outdoor) 3times 3 Communication Poorly
54 3-Phase Wrong wiring 4times 3 3-Phase Wrong Wring of Outdoor Unit (Reverse Phase/Omission of Phase)
60 EEPROM Check Sum Error 6times 3 o Check Sum Mismatching
61 Cond. Pipe Th High 1 times 3 Cond. Temp. High
62 Heaksink Th High 2times 3 Heatsink Temp. High
65 Heaksink Th Error 5times 3 Open/Short
67 Outdoor BLDC Fan Lock 7times 3 Outdoor Fan is not operation
73 PFC Fault Error(SAN) 7times 3 3times 3 Over Current of Outdoor Unit PFC


LG BNU-BAC air error codes

Function Name Code Description
Read Coil Status 01 h Run/Stop(status), Lock(status), Swing(status), Alarm, Filter Sign(status), Mode Lock(status), Wind Flow Lock(status)
Read Holding Registers 03h Operation Mode(status), Fan Speed(status), Room Temperature, Error Code,
Set Room Temperature(status),
Set Lower Temperature(status),
Set Upper Temperature(status),
User Mode(status)
Force Single Coil 05h Run/Stop(setting), Lock(setting), Swing(setting), Filter Sign Reset, Mode Lock(setting),
Wind Flow Lock(setting)
Preset Single Registers 06h Operation Mode(setting), Fan Speed(setting), Set Room Temperature(setting),
Set Lower Temperature(setting),
Set Upper Temperature(setting),
User Mode(setting)


LG FM15AH UL3 Svc air error codes

Display code Title Cause of error Check point & Normal condition
1 Indoor air sensor • Open / Short
• Soldered poorly
• Internal circuit error
Normal resistor: 10KS2/ at 25°C (Unplugged)
Normal voltage : 2.5Vdc / at 25°C (plugged)
2 Indoor inlet pipe sensor • Open / Short
• Soldered poorly
• Internal circuit error
Normal resistor: 5K£2/ at 25°C (Unplugged)
Normal voltage : 2.5Vdc / at 25°C (plugged)
6 Indoor outlet pipe sensor
3 Communication
Wired R/C
• Open / Short
• Wrong connection
• Connection of wire
• Main PCB Volt. DC 12V
• Noise interference
4 Drain pump/Float switch • Float switch Open. (Normal: short) • The connection of wire(Drain pump/ Float switch)
• Drain pump power input. (220V)
• Drain tube installation.
• Indoor unit installation. (Inclination)
4/53 Communication (Indoor ► Outdoor) • Communication poorly • Power input AC 220V. (Outdoor, Indoor)
• The connector for transmission is disconnected.
• The connecting wires are misconnected.
• The GND1,2 is not connected at main GND.
• The communication line is shorted at GND.
• Transmission circuit of outdoor PCB is abnormal.
• Transmission circuit of indoor PCB is abnormal.
21 DC Peak • Instant over current
• Over Rated current
• Poor insulation of IPM
• An instant over current in the U,V,W phase
– Comp lock
– The abnormal connection of U,V,W
• Over load condition
– Overcharging of refrigerant
– Pipe length.
• Poor insulation of compressor
22 Max. C/T Over current (14A) Malfunction of compressor
Blocking of pipe
Low voltage input
Refrigerant, pipe length, blocked,…
40 CfT
Internal circuit
Initial current error Malfunction of current detection circuit.
(Open / Short)
The voltage of “C01N” Is 4.0Vdc(25A).
23 DC Link
Low voltage.
• DC link volt, is 140Vdc. • Check the power source.
• Check the components.
28 DC Link
High voltage
• DC link volt, is 420Vdc T
24 Press S/W Open • Low / High press
S/W open.
• Check the connection of “CN_Press”.
• Check the components.
25 Input voltage • Abnormal Input voltage • Check the power source.
• Check the components.

 

26 DC Compressor
Position
• Compressor position detect error • Check the connection of comp wire “U,V,W”
• Malfunction of compressor
• Check the component of “IPM”, detection parts.
27 PSC Fault • Over current at “IGBT” • Check the component of “IGBT”.
• Check the components.
32 D-pipe (Inverter) temp, high (105°C t) • Discharge sensor (Inverter) temp, high • Check the discharge pipe sensor for INV.
• Check the install condition for over load.
• Check the leakage of refrigerant.
• Check the SVC V/V open.
33 D-pipe (Constant) temp, high (105°C I) • Discharge sensor (Cons.) temp, high • Check the discharge pipe sensor for Cons.
• Check the install condition for over load.
• Check the leakage of refrigerant.
• Check the SVC V/V open.
41 D-pipe sensor (Inverter) • Open / Short
• Soldered poorly
• Internal circuit error
• Normal resistor: 200K£2 / at 25°C (Unplugged)
• Normal voltage : 4.5Vdc / at 25°C (plugged)
44 Air sensor • Normal resistor: 10K£2 / at 25°C (Unplugged)
• Normal voltage : 2.5Vdc / at 25°C (plugged)
45 Condenser Pipe sensor • Normal resistor: 5K£2 / at 25°C (Unplugged)
• Normal voltage : 2.5Vdc / at 25°C (plugged)
46 Suction Pipe sensor
47 D-pipe sensor (Constant) • Normal resistor: 200K£2 / at 25°C (Unplugged)
• Normal voltage : 4.5Vdc / at 25°C (plugged)
65 Heat sink sensor • Normal resistor: 10K£2 / at 25°C (Unplugged)
• Normal voltage : 2.5Vdc / at 25°C (plugged)
51 Over capacity • Over capacity
Combination
• Check the indoor unit capacity.
• Check the combination table.
60 EEPROM Check sum • Check sum error • Check the PCB ASM P/No.
• Check the poor soldering.
61 Condenser pipe sensor temp, high • Condenser pipe sensor detected high temp.(65°C) • Check the load condition.
• Check the sensor of Condenser pipe sensor.
62 Heat sink sensor temp, high • Heat sink sensor detected high temp.(85°C) • Check the fan is locked.
• Check the sensor of heat sink.
5/53 Title Communication
(Indoor ► Outdoor)
• Communication poorly • Power input AC 220V. (Outdoor, Indoor)
• The connector for transmission is disconnected.
• The connecting wires are misconnected.
• The communication line is shorted at GND.
• Transmission circuit of outdoor PCB is abnormal.
• Transmission circuit of indoor PCB is abnormal.
21 DC PEAK
(IPM Fault)
• Instant over current
• Over Rated current
• Poor insulation of IPM
• An instant over current in the U,V,W phase
– Comp lock
– The abnormal connection of U,V,W
• Over load condition
– Overcharging of refrigerant
Pipe length.
Outdoor Fan is stop
• Poor insulation of compressor


LG LP2525GXR air error codes

Self Diagnosis Possible Causes What To Do
Code appears in the display. F1,F2 or F3 Air conditioner is in FAN mode and the number shown is the set fan speed. This is normal. The air conditioner is working properly.
FL The water collection tank is full. Empty the water collection tank.
CH01 Short or open circuit in the indoor air thermistor. Unplug the air conditioner and contact your authorized LG service center.
CH02 (error solution ch02)

LG LS090HSV4 air error codes

Error Code Description No. of Times Indoor Unit LEDs Blink
LED1 (Plasma LED) LED2 (Power LED)
1 Indoor unit room temperature sensor error 1X
2 Indoor unit inlet pipe sensor error 2X
4 Float switch error (optional) 4X
5 Communication error between indoor unit and outdoor units 5X
6 Indoor unit outlet pipe sensor error 6X
9 Indoor unit EPROM error 9X
10 Indoor unit BLDC motor fan lock 1X
12 Indoor unit middle pipe sensor error 2X
21 DC Peak (IPM Fault); Compressor DC voltage was too high
22 Current Transformed (CT2) error; Alternating current (AC) input too high 2X
23 DC Link Low Volt 3X
25 AC Low/High Volt 5X
26 DC Comp Position Error (not providing rotation), Locking 6X
27 PSC Fault; Current to inverter compressor between AC and DC converter circuit too high 7X
28 Inverter compressor DC voltage is too high 8X
29 Inverter compressor amperage is too high 9X
31 Current-to-current transformer (CT) thermistor is too low 3X 1X
32 Inverter Compressor Discharge Pipe (D-Pipe) Overheat 2X
40 CT Sensor Error; Thermistor is disconnected or shorted out 4X
41 D-Pipe Sensor INV is disconnected or shorted out 1X
44 Outdoor Air Sensor is disconnected or shorted out 4X
45 Middle thermistor of outdoor unit condenser coil is disconnected or shorted out 5X
46 Outdoor unit suction line thermistor is disconnected or shorted out 6X
48 Outdoor unit coil outlet (liquid line) thermistor is disconnected or shorted out 8X
53 Communication failure from outdoor unit to indoor unit 5X 3X
60 Outdoor unit printed circuit board (PCB) EPROM check sum error 6X
61 Outdoor unit condenser coil temperature is too high 1X
62 Outdoor unit inverter compressor PCB heat sink temperature is too high 2X
63 Condenser coil pipe thermistor temperature is too low 3X
65 Heat sink thermistor has disconnected or has shorted out 5X
67 Outdoor brushless direct current (BLDC) fan motor lock error 7X