Monday, June 13, 2016

LG air conditioner – LG split AC - LG Inverter AC - Error codes – Causes and solution – CH1– CH2 - Home appliances repair and service

LG split AC 

ERROR CODE CAUSES AND SOLUTION 
CH 01
Indoor air sensor
# Connector connection error
# Faulty PCB
# Faulty sensor (Open / Short)
Normal resistor : 10K 
Ohms/ at 25 Degree C (Unplugged)
Normal voltage : 2.5Vdc / at 25 Degree C (Plugged)
CH 02
Indoor inlet pipe sensor
# Connector connection error
# Faulty PCB
Faulty sensor (Open / Short)
Normal resistor : 5K 
Ohms/ at 25 Degree C (Unplugged)
Normal voltage : 2.5Vdc / at 25 Degree C (Plugged)
CH 03
Communication Error (Wired remote controller)
# Connector connection error
# Faulty PCB / Remote controller
# Connection wire break
# Connection of wire
# Main PCB Volt. DC12V
# Noise interference
CH 04
Drain pump/ Float switch
# Float switch open. (Normal : short)
# Water over flow
# The connection of wire (Drain pump/ Float switch)
# Drain pump power input. (220V)
# Drain tube installation.
# Indoor unit installation. (Inclination)
CH 06
Indoor outlet pipe sensor
# Connector connection error
# Faulty PCB
# Faulty sensor (Open / Short)
Normal resistor : 5K 
Ohms / at 25 Degree C (Unplugged)
Normal voltage : 2.5Vdc / at 25 Degree C (Plugged)
CH 09
EEPROM Check sum (Indoor)
# Check sum error
# Check the poor soldering.
# Change PCB
CH 10
BLDC motor fan lock (Indoor)
# Fan motor break down
# Fan motor & PCB poor contact
# Obstruction to the fan
# Check the indoor fan motor.
# Check the connection status between
# PCB and fan motor.
CH 05/21
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
CH 53
Communication
(Indoor <>Outdoor)
# The connector for trans mission is disconnected.
# The connecting wires are misconnected.
# The communication line is break
# Outdoor PCB is abnormal.
# Indoor PCB is abnormal.
# Check power input AC 230V. (Outdoor, Indoor)
# Check connector for transmission
# Check wires are misconnecting.
# Check transmission circuit of outdoor PCB
# Check transmission circuit of indoor PCB
CH 22
Max. C/T
# Over current
# Malfunction of compressor
# Blocking of pipe
# Low voltage input
# Refrigerant, pipe length, blocked,
CH 40
C/TInternal circuit
# Initial current error
# Malfunction of current detection circuit. (Open / Short)
# The voltage of “C01N” Is 4.0Vdc (25A) .
CH 23
DC Link Low voltage.
# 1ph : DC link volt. Is 140Vdc .
# 3ph : DC link volt. Is 250Vdc
# Check the power source.
# Check the components.
CH 28
DC Link High voltage
# 1ph : DC link volt. is 140Vdc .
# 3ph : DC link volt. is 250Vdc .
# Check the power source.
# Check the components.
CH 25
Input voltage
# Abnormal Input voltage (140Vac , 300Vac )
# Check the power source.
# Check the components.
CH 24
Press S/W Open
# Low / High press S/W open.
# Check the connection of “CN_PRESS”
# Check the SVC V/V open.
# Check the leakage of refrigerant.
CH 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.
CH 27
PSC Fault
PFC Fault
# Over current at “IGBT”/PFC module
# Check the component of “IGBT” /PFC module.
# Check the components.
CH 29
Inverter compressor over current
Inverter compressor input current is over 30A
1. Overload operation
(Pipe clogging/Covering/EEV defect/Ref. over charge)
2. Compressor damage(Insulation damage/Motor damage)
3. Input voltage low
4. ODU inverter PCB assembly damage
CH 32
D-pipe (Inverter) temp. high (105 
Degree C )
# 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.
CH 33
D-pipe (Constant) temp. high (105 Degree C )
# 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.
CH 39
Transmission Error
Between (PFC Micom  >INV Micom)
Communication Error Between PFC Micom and INV Micom.
1. Micom defect/Circuit defect
2. Different Micom S/W Version
3. ODU inverter PCB assembly damage
CH 41/47
D-pipe sensor(Inv)
D-pipe sensor(Cons)
# Connector connection error
# Faulty PCB
# Faulty sensor (Open / Short)
# Normal resistor : 200K Ohms/ at 25 
Degree C (Unplugged)
# Normal voltage : 4.5Vdc / at 25 Degree C (plugged)
CH 44
Air sensor
# Connector connection error
# Faulty PCB
# Faulty sensor (Open / Short)
Normal resistor : 10K 
Ohms/ at 25 Degree C (Unplugged)
# Normal voltage : 2.5Vdc / at 25 Degree C (plugged)
CH 45/46
Condenser Pipe sensor Suction Pipe sensor
# Connector connection error
# Faulty PCB
# Faulty sensor (Open / Short)
# Normal resistor : 5K 
Ohms/ at 25 Degree C (Unplugged)
# Normal voltage : 2.5Vdc / at 25 Degree C (plugged)
CH 65
Heat sink sensor
# Connector connection error
# Faulty PCB
# Faulty sensor (Open / Short)
# Normal resistor : 5K 
Ohms/ at 25 Degree C (Unplugged)
# Normal voltage : 2.5Vdc / at 25 Degree C (plugged)