LG LFXS32726 Series - Page 86

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11-1 Check A
- There is PC Board located in the PCB case.
The control driver is PC board for the compressor.
- This step shows the source voltage of the driver PC board.
* Driver PCB located in machine room.
Step1. Open PCB Cover Step2. Check Driver PCB
LED Lamp
Checking PCB Output
IPM Output check
 Check the voltage that the PCB supplies to the compressor.
A-Inverter
 Check the PCB output voltage to determine whether the PCB functions
normally.
Normal: Th e voltage of £ (COMMON, POWER) or ¤ (COMMOM, SAVE)
should be 80 V or above.
Multi
Tester
ྙ
ྚ
ྙ
ྚ
Checking PCB Failure
 Check if th e fuse is disconnected. If the fuse is okay, check the voltage of DC link terminal.
 Check the low voltage terminal.
ྜ Check if the LED blinks.
Check the measures depending on the number of
LED blinks.
ྙ Check the fuse (disconnection).
ྚ Check the voltage of DC link terminal.
(Multi Te ster)
Spec. approx. 310 V DC
GND
Voltage
ྛ Check the low voltage terminal.
(Multi Te ster)
Spec. A Point 15V
B Point 5V
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