LG LS-F1260NL Service Manual ▷ View online
-57-
When compressor does not oprate normally.
■
Communication error between Indoor and Outdoor (Error Code
➄
)
Trouble 7-2
Does the operating LED in display PCB
Ass'y blink 5 times?
Ass'y blink 5 times?
• Check the state of connecting cable
(3 line) bewteen indoor and outdoor unit .
• Check Fuse, Noise Filter, PTC, etc.
NO
YES
Is the voltage of CN-POWER Pin No. 1,2
AC220/240V in Main PCB Ass'y.
AC220/240V in Main PCB Ass'y.
• Electrical wiring diagram(Colors)
• Check the connecting state
• Check the connecting state
of connectors in PCB Ass'y (Main/Sub)
• Check the Fuse of outdoor Control Box.
NO
YES
Is the voltage of CN-AC AC220/240V in
SUB PCB Ass'y?
SUB PCB Ass'y?
• Check the connecting state of connectors
in PCB Ass'y(Main/Sub).
NO
YES
Is the voltage of CN-DC over than
DC380V?
DC380V?
Replace the Sub PCB Ass'y.
NO
YES
Is the connection of CN-DATA between
indoor and outdoor unit right?
indoor and outdoor unit right?
Replace the PCB Ass'y.
• Main PCB Ass'y (Indoor/Outdoor)
• Control Box Ass'y.
• Control Box Ass'y.
• Reconnect the cable to terminal block.
• Check the PCB pattern(Resoldering).
• Check the PCB pattern(Resoldering).
NO
YES
-58-
When compressor does not oprate normally.
■
CT Error (Error Code
➆
)
Trouble 7-3
Does the operating LED in Display PCB
Ass'y blink 7 times?
Ass'y blink 7 times?
• Check the state of connecting cable
(3 line) bewteen Indoor and Outdoor Unit .
• Check fuse, Noise Filter, PTC, etc.
NO
YES
Is the courrent transformer(CT) in Main
PCB Ass'y right?
PCB Ass'y right?
Check the PCB pattern(resoldering)
NO
YES
Is the indoor/outdoor fan locked?
Check the motor.
NO
YES
Is the discharge temperature of Indoor unit
right(11°C~17°C)?
right(11°C~17°C)?
Check the compressor.
NO
YES
Is the refrigerant pressure right?
Supply the refrigerant
NO
YES
Replace the PCB Ass'y.
• Main PCB Ass'y(Outdoor)
• Control Box Ass'y(Outdoor)
• Control Box Ass'y(Outdoor)
-59-
■
The problem of missing the connector (INDOOR MAIN PCB ASSY)
Connectors
CN-POWER
CN-AC
CN-DC
CN-IPM
CN-GND1,2
CN-HEAT
CN-4WAY
CN-FAN
CN-OLP
CN-TH
CN-COMP
Condition
OPEN
OPEN
OPEN
OPEN
OPEN
OPEN
OPEN
OPEN
OPEN
OPEN/SHORT
OPEN/SHORT
• Malfunctions outdoor unit.
• Stop compressor and outdoor fan.
• The operation LED blinks 5 times.
• Stop compressor and outdoor fan.
• The operation LED blinks 5 times.
• Malfunctions outdoor unit.
• Stop compressor and outdoor fan.
• The operation LED blinks 5 times.
• Stop compressor and outdoor fan.
• The operation LED blinks 5 times.
• Malfunctions PFC & inverter circuit.
• Stop compressor and outdoor fan.
• Stop compressor and outdoor fan.
• Malfunctions EMI /EMS
• Malfunctions Sump Heater
• Malfunctions 4-WAY valve.
• Malfunctions fan.
• Malfunctions Comp. Motor.
• The operation LED blinks 4 times.
• The LED01K blinks 4 times.
• The operation LED blinks 4 times.
• The LED01K blinks 4 times.
• The operation LED blinks twice.
• The LED01K blinks twice.
• The LED01K blinks twice.
• The LED01K blinks 10 times.
• Continue Comp. operation.
• Continue Comp. operation.
(when the comp. dome TH opens)
• Stop Comp. operation
(when the comp. dome TH shorts)
• Malfunctions outdoor unit.
• Stop compressor and outdoor fan.
• The operation LED blinks 5 times.
• Stop compressor and outdoor fan.
• The operation LED blinks 5 times.
Problem (error mode)
-60-
■
The problem of missing the connector (OUTDOOR MAIN PCB ASSY)
Connectors
CN-PWR
CN-FAN
CN-DATA
CN-DISP1
CN-DISP2
CN-TH
CN-UP/DOWN
CN-LR
Condition
OPEN
OPEN
OPEN
OPEN
OPEN
OPEN/SHORT
OPEN
OPEN
• Malfunctions all indoor & outdoor unit.
• Malfunctions remocon, force, test operation mode.
• Malfunctions remocon, force, test operation mode.
• Malfunctions outdoor unit.
• Stop compressor and outdoor fan motor.
• The operation LED blinks 5 times.
• Communicaion error.
• Stop compressor and outdoor fan motor.
• The operation LED blinks 5 times.
• Communicaion error.
• Malfunctions remote contoller.
• Don't operate the display module.
• Don't operate the display module.
• Don't operate the display module.
• The operation LED blinks twice.
• Enable to receive remote singnal.
• Enable to receive remote singnal.
• Malfunctions UP/DOWN step motor.
• Don't operate louver.
• Don't operate louver.
• Don't apply this model.
• To apply another model.
• To apply another model.
• Malfunctions indoor fan motor.
Problem (error mode)
■
The problem of missing the connector (SUB PCB ASSY)
Connectors
CN-UVW
CN-AC
CN-DC
CN-IPM
Condition
OPEN
OPEN
OPEN
OPEN
• Stop compressor Motor.
• Malfunctions outdoor unit.
• Stop compressor and outdoor fan.
• The operation LED blinks 5 times.
• Stop compressor and outdoor fan.
• The operation LED blinks 5 times.
• Malfunctions PFC & inverter circuit.
• Stop compressor and outdoor fan.
• Stop compressor and outdoor fan.
• Malfunctions outdoor unit.
• Stop compressor and outdoor fan.
• The operation LED blinks 5 times.
• Stop compressor and outdoor fan.
• The operation LED blinks 5 times.
Problem (error mode)
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