Hoist issues A/C trip, counting faults, slow down fault trip outs, clutch fault. HOIST DOWN AT 1425, CALLED MSHA @1430 (on auto hold waiting for operator to pick-up, hung up and re-dialed to be on auto hold again) made contact with MSHA operator @ 1450, hoist back up at 1530 at which time MSHA was notified (answered immediately) of hoist being operational.