LG CT18 NQ2 - Page 72

4. Trouble Shooting
- 72 -
Copyright ©2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
&SSPS/P &SSPS5ZQF &SSPS1PJOU .BJO3FBTPOT

*OEPPSVOJU#-%$GBONPUPSGBJMVSF
*OEPPS#-%$GBONPUPS
GFFECBDLTJHOBMJTBCTFOU
GPSTFD
.PUPSDPOOFDUPSDPOOFDUJPOGBVMU
*OEPPS1$#GBVMU
.PUPSGBVMU
⶯&SSPSEJBHOPTJTBOEDPVOUFSNFBTVSFGMPXDIBSU
Is connector
connection proper?
Yes
No
Connect properly
Is fan motor
normal?*
Replace indoor unit fan motor
* It is normal when check hall sensor of indoor fan motor as shown below
Yes
No
k
Replace indoor unit PCB **
<Checking connection state of fan motor connector>
1 4 5
6 7
1
5
6
7
4
4
4
4
Each termainl with the tester
Tester
TH chassis
hundreds kΩ hundreds kΩ
hundreds kΩ hundreds kΩ
+-
TD chassis
Normal resistance(±10%)
** Replace the indoor unit PCB, and then make sure to do Auto addressing and input the
address of central control
(Notice: The connection of motor connector to PCB should be done under no power
supplying to PCB)
∞
∞
∞
∞
6.6 Troubleshooting Indoor Error
CH 10 (Indoor unit BLDC fan motor failure)