LG CT09F Service Manual page 138

6.7 Troubleshooting Outdoor Error
CH 54 (Open and Reverse Phase Error)
Judgment Method of R,S,T phase loss
- Set the tester in AC voltage measurement mode (The part having wave pattern)
- The part that does not generate voltage was upgraded.
- Power module requires checking..
R S T N
Judgment method of open and reverse phase of R,S,T
- Operation with replacement of R and S phases only
Brown B Black Green
R S T
Brown B Black Green
R S T
??
Vac Vac
N
N R
??
Vac Vac
Brown B Black Green
R S T N
B Br o w n B a l c k Green
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Part 4 Trouble Shooting
S T N
??
Vac Vac