LG CQ09 NA0 - Page 79

- 79 -
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4. Trouble Shooting
1VSQPTF
+VEHNFOUPGUIF*1.QBSUGBVMUPG
1$#BTTFNCMZ
*UFNTGPSDIFDLJOH
+VEHNFOUPGEBNBHFPG*(#5
$IFDLJOHUIFTPMEFSJOHTUBUF
⶯ How to check IPM IGBT (Diode Mode)
<'JH> <'JH>
3FNPWFUIFDPOOFDUPSGSPN1$#
4FUUIF.VMUJ5FTUFSBT%JPEF7PMUBHF.FBTVSFNFOU.PEF

.FBTVSFUIFWPMUBHFTPG1_61_71_8BTTIPXOJO'JH
.FBTVSFUIFWPMUBHFTPG6_/V7_/W8_/XBTTIPXOJO'JH
*GUIFNFBTVSFNFOUTBSFTJHOJGJDBOUMZEJGGFSFOUGSPNUIFMFWFMTTIPXOJOUIFGJHVSFTUIF*1.JTEFFNFEUP
CFEBNBHFE
Sequence of
Measurement
Measurement
Normal
Standards
1 P-U 0.4V~0.6V
2 P-V 0.4V~0.6V
3 P-W 0.4V~0.6V
Sequence of
Measurement
Measurement
Normal
Standards
1 U-Nu 0.4V~0.6V
2 V-Nv 0.4V~0.6V
3 W-Nw 0.4V~0.6V
*1.$IFDL
6.7 Troubleshooting Outdoor Error
CH 21 (DC Peak / Comp IPM Fault)