Samsung ACH1800E Technical Manual page 156

Fault Diagnosis by Symptom
G EC08 : When the reverse of three phase power is found.
Check point :
- Con check CN76 to connect correctly.
- Check IC51, IC52, IC53 to connect correctly.
Check the Mis-insertion of CN76?
NO
Wire shorted?
NO
Check the pin no 4 of IC51, IC52, IC53,
does this make round type signal?
YES
IC correct
Take two connected lines to change the string of
L1, L2, L3 because of the reverse of power.
TROUBLE SHOOTING & ERROR MODE
(Cont.)
YES
Insert correctly
Replace IC that does not
make round type signal
Replace wire
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