Compressor - LG LTNS16121V /00 Service Manual

6. COMPRESSOR

6.1 How to find out Inverter BLDC Compressor defect
If Inverter BLDC Compressor defect occurs, you can check in the following order.
Standard for judging normality
‡ :KHQ WKH UHVLVWDQFH YDOXH RI +DUQHVV FRQQHFWHG WR &RPSUHVVoU FRQQHFWLQJ 0DLQ 3&% &21  LI WKH UHVLVWDQFH YDOXH
shows the value of the level in the following figure, you can say that it is normal.
Standard for defining compressor defect
Disassembly compressor PTC cover and verify that is correctly FRQQHFWHG WR FRPSUHVVRU WHUPLQDOV 3RLQW &  DV VKRZQ LQ
the figure, if it's correctly connected you must check directly the compressor resistance for doing so you have to disconnect
WKH FRPSUHVVRU WHUPLQDOV DQG FKHFN EHWZHHQ WKH WHUPLQDOV 8V 8:, V: LI LW'V DFFRUGLQJ VSHFLILFDWLRQV   2KPV 
WKLV FRXOG EH D KDUQHVV SUREOHP RU GDPDJHG 2/P.
During compressor defects diagnosis, through resistance measuUHPHQW LI YDOXHV EHWZHHQ WHUPLQDOV 8 V : RI WKH FRQQHFWRU
&21 3RLQW A) show the resistance value according compressor specification then the compressor motor is correct.
&KHFN WKDW WKH 2/P WHUPLQDOV 3RLQW % DUH FRUUHFWO\ FRQQHFWHG, if it'V QRUPDO \RX PXVW PHDVXUH 2/P resistance between its
terminals. If the resistance value is 5
as consequence there's no voltage supply from PCB and compressor will not work; it'V QHFHVVDU\ FKDQJH 2/P and check
again the correct performance.
If there'V QR FRQQHFWLRQ DQG 2/P resistance values issues, it could be compressor defect, check the compressor resistance.
If there's no problem with compressor resistance value, it could be Main PCB defect, you must check Main PCB defects
section.
Caution
 Turn off the refrigerator and make sure is unplugged, if you are going to perform some measures wait few minutes after the
device was unplugged.
 ,I WKH YDOXH RI WKH PHDVXUHG UHVLVWDQFH LV QRW FRUUHFW LW FRXOG be a wrong diagnosis due to the resistance may vary
according to the ambient temperature or operation conditions.
Compressor Motor Resistance
%0$ /$09
A difference of some
resistance value due to ambient
temperature and operation conditions.
or lower, it's normal condition. In case that the value is higher WKH 2/P is damaged and
   
can occur in the
Multitester
U
Multitester

B OLP
Terminal Compresor
U
C
CON 201
V
A
Multitester
W
V
W