Batter Charge Fault error

I have a 2006 2006 206 hdi 110.000 km diesel vehicle. Passers-by also gave the Battery Charge Fault error. The battery lamp went out after 2 minutes. A few days later, the battery lamp came on again. Alternator's coals and copper tip and bearings have changed. After 3 weeks the fault (battery lamp) did not light up. After 3 weeks, the battery light started to light up occasionally. This time the connector has changed. A month passed, the battery lamp started to light up from time to time. What do you think is the problem? How can I solve it. Currently, the battery lamp is still lit intermittently.