Our A320 FCOM procedure for AIR PACK 2 REGUL FAULT makes no mention of turning the HOT AIR off, though with loss of the Hot Air Regulating Valve, the Trim Air Valves are automatically closed
it is the same procedure in our FCOM, but the situation happened,there was a xx amber on the pack flow valve 2,the HOT air was closed,Trim air valves closed,when we printed the failure it said,temperature sensor fault.