LG LS-F1260NL Service Manual ▷ View online
-48-
1. The malfunction indicator of indoor (see the operating LED)
The self-diagnosis function
The cause of malfunction
Error
Code
1
Indoor TH. is short or open.
Outdoor TH. is short or open.
Outdoor OLP is open.
Comunication error (serial
comunication).
comunication).
DC peak error.
Running current is
overloaded.
overloaded.
The operating LED will be
blinking once.
blinking once.
The operating LED will be
blinking twice.
blinking twice.
The operating LED will be
blinking 4 times.
blinking 4 times.
The operating LED will be
blinking 5 times.
blinking 5 times.
The operating LED will be
blinking 6 times.
blinking 6 times.
The operating LED will be
blinking 7 times.
blinking 7 times.
Keep operating state.
Keep operating state.
Restart compressor in the OLP short
state.
state.
The operation is off(enable to restart
by remote controller).
by remote controller).
Compressor will be turned off
immediately.
immediately.
Compressor will be turned off
immediately.
immediately.
Malfunction indicator
The operating state
2. The malfunction indicator of outdoor (see the LED01M on the outdoor PCB ass’y)
The cause of malfunction
Indoor TH. is short or open.
Outdoor OLP is open.
Comunication error (serial
comunication).
comunication).
DC peak error.
Running current is
overloaded.
overloaded.
Comp. dome TH is short or
open.
open.
The LED01M will be blinking
twice.
twice.
The LED01M will be blinking 4
times.
times.
The LED01M will be blinking 5
times.
times.
The LED01M will be blinking 6
times.
times.
The LED01M will be blinking 7
times.
times.
The LED01M will be blinking 10
times.
times.
Keep operating state.
Restart comp. on in the OLP short
state.
state.
The operation is off(enable to restart
by remote controller).
by remote controller).
Compressor will be turned off
immediately.
immediately.
Compressor will be turned off
immediately.
immediately.
Compressor will be turned off
immediately.
immediately.
Malfunction indicator
The operating state
❈
Error code
➅
,
➆
can’t be operated unless the power cord is removed.
2
4
5
6
7
2
4
5
6
7
10
Error
Code
-49-
■
Precaution in Service or Check
Even after stopping the operation of product, it takes some time to discharge the remaining electricity of the
electrolytic capacitor that was charged. Before starting a checking or repairing job, pull out the plug out of the
outlet and make sure that the lamp on the control board outdoor unit is off.
electrolytic capacitor that was charged. Before starting a checking or repairing job, pull out the plug out of the
outlet and make sure that the lamp on the control board outdoor unit is off.
■
The Diagnosis Procedure
Check the supplied voltage to product (AC 220V/240V ± 30V).
Check the connecting cable between Indoor and Outdoor.
Check the blinking number of operation indicator (refer to the self-error function).
Check the self-diagnosis table
• Check the condition of connectors
• The condition of P.C.B pattern.
• The condition of P.C.B pattern.
• Check the condition of connectors.
• The condition of P.C.B pattern.
• The electronic components.
• The condition of P.C.B pattern.
• The electronic components.
Indoor
Outdoor
The Electric Parts Troubleshooting Guide
-50-
❇
Refer to electronic contorol device drawing & schematic diagram.
The Product doesn’t operate at all.
Turn off the main power and wait to 5 seconds
Turn on the main power again.
Does "Beeping" sound is made from the indoor unit?
• Primarily, the operating
condition of Micom is O.K.
• Check CN-DISP1
CN-DISP2
Check the voltage of power(AC220V/AC240V, 50Hz).
• The voltage of main power.
• The voltage applied to the unit.
• The connecting method of Indoor/Outdoor connecting cable (each color)
• The P.W.B. Ass'y
(Fuse, Noise Filter, Power Transformer, Bridge Diode, etc.)
• The voltage applied to the unit.
• The connecting method of Indoor/Outdoor connecting cable (each color)
• The P.W.B. Ass'y
(Fuse, Noise Filter, Power Transformer, Bridge Diode, etc.)
Trouble 1
NO
YES
The operation check of the P.C.B. Ass'y
Procedure
1) The input voltage of power
transformer.
2) The output voltage of power
transformer.
3) IC6(7812)
4) IC3(7805)
5) IC4(KIA7036)
Specification
1) AC230V ± 30V
: Check the rated voltage
2) 14V ± 3V
3) DC12V
4) DC5V
5) The voltage of micom pin 29
: DC4.5V
↑
Remedy
1) Replace
power transfomer.
2) Replace
power transfomer.
3) Replace IC6.
4) Replace IC3.
5) Replace IC4.
-51-
Turn on main power.
While the compressor has been stopped, the compressor does not operate
owing to the delaying function for 2 minutes after stopped.
When the compressor stopped Indoor Fan is driven by a low speed.
At this point the wind speed is not controlled by the remote controller.
(When operated in the Sleeping Mode, the wind speed is set to the low speed as force).)
Caused by the remote controller.
Caused by other parts except
the remote controller
When the mark (
) is displayed in LCD
screen, replace battery.
Check the contact of CN-DISP 1, 2 connector
When the detect switch (double key) inside the
remote controller door is fault, it is impossible to
operate temperature regulating(
▲
/
▼
) and wind
speed selecting.
Check DISP PWB Ass'y
-Voltage between CN1
➀
-
➆
: DC +5V
Check the connecting circuit between the
remote controller MICOM(No.
30
)-R17(2
Ω
)-IR-
LED-Q1-R16(2.2k
Ω
)
Check point
• Check the connecting circuit between
• Check the connecting circuit between
MICOM PIN
49
-C01L(1k)-01L(0.001µF)
• Check receiver ass'y
Product doesn't operate with the remote controller.
Trouble 2
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