So, these are the symptoms:
1] The big fan outside is taking a lot longer to start.
2] Within 2 minutes of start-up and cooling, it makes a growling/ rattling sound and
3] The power switch to start the AC trips automatically and the whole unit shuts down.
The problem started this morning, after a power outage, when we heard that electricians were repairing connections somewhere in the city.
Until then the AC was running fine. What could be the problem.