HOISTMAN STARTED AT 5:50 A.M. TO TEST #31 HOIST AND COULD ONLY LOWER HOIST. WHEN HE TRIED TO RESET POWER IT WOULDN'T RESET. MSHA WAS CALLED AT 6:25 A.M. AND TOLD THE HOIST WAS DOWN. WE DIDNT H AVE ANYONE UNDERFOND AT THE TIME. THE ELECTRICIANS FOUND A FAULT IN THE UPPER HOIST LIMIT SWITCH AND REPAIRED IT. THE HOIST WAS RETURNED TO SERVICE AT 7:05 AM SAME DAY AND MSHA WAS CALLED AND