LG Multi-Inverter Type, Руководство по обслуживанию

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Only for training and service purposes
LGE Internal Use Only
4. Trouble Shooting
6.1 The Product doesn
’ ’
t operate at all
The operation check of the Indoor P.C.B. Ass'y
Procedure
1) The input voltage of power mod-
ule.
2) The output voltage of power mod-
ule.
4) IC04D(7805)
5) IC01A(KIA7036)
Specification
1) AC230V ± 30V
: Check the rated voltage
2) 12V ± 3V
4) DC5V
5) The voltage of micom pin 19
: DC4.5V
↑
Remedy
1) Check the power outlet.
2) Replace
P.C.B Ass'y
4) Replace P.C.B Ass'y
5) Replace P.C.B Ass'y
Turn on the main power again.
Turn off the main power and
wait for 10 seconds.
Yes
No
A "Beeping" sound is made
from the indoor unit
Check the voltage of power supply (AC220V/AC240V, 50Hz) and check
for the following :
* The voltage of main power supply.
* The voltage applied to the unit.
* The connecting method of Indoor/Outdoor connecting cable (each color)
* The P.C.B. Assembly (Fuse, Noise Filter, Power Module, Bridge Diode, etc.)
Primarily, the operating condition of
Micom is O.K.
* Check, Remote controller & Receiver.
* Check CN-DISP1, CN-DISP2 of
indoor PCB
6. Electronic Parts