Fault code advice

[L333fow]

Hi guys had a fault code pop up a while back and hasn't occurred again but can't clear it!
Its showing as HVAC

Code as follows
01487 system function test
008 implausible signal
freeze frame
fault status 01101000
fault priority 3
fault frequency 1
reset counter 183
milage 71826
time indication 0
date 2013.08.31
time 11.11.47


cheers