I replaced a ceiling fan/light, which was attached to a wall-mounted dimmer switch, with a pendant light. The dimmer has an on/off switch as well as a slide bar to control the brightness of the light. The dimmer did not control the fan before and only controlled the fan’s light. The circuit breaker was triggered during installation and had to be reset. I used one of the bulbs from the fan for the new pendant light. While the new light turns on/off with the switch, it does not dim. The light stays at its brightest regardless of where the slide bar is moved. Did the dimmer switch get damaged? Should I replace it? If not, why does the dimmer not work on my new pendant light when it worked 30 minutes before with the fan light and same bulb?

Our rented bungalow is lighted with 220 volts electricity. After 6 months my ceiling lights dimmed into 110 volts but all my outlets are still 220 volts. I checked the circuit breaker for ceiling lights and they are ok. Did the previous occupants tampered the power supply?