How to clear T2000 system controller faults?

sc> help

Available commands
------------------
Power and Reset control commands:
  powercycle [-y] [-f]
  poweroff [-y] [-f]
  poweron [-c] [FRU]
  reset [-y] [-c]
Console commands:
  break [-D] [-y] [-c]
  console [-f]
  consolehistory [-b lines-e lines-v] [-g lines] [bootrun]
Boot control commands:
  bootmode [normalreset_nvrambootscript="string"config="configname"]
  setkeyswitch [-y] 
  showkeyswitch
Locator LED commands:
  setlocator [onoff]
  showlocator
Status and Fault commands:
  clearasrdb
  clearfault 
  disablecomponent [asr-key]
  enablecomponent [asr-key]
  removefru [-y] 
  setfru -c [data]
  showcomponent [asr-key]
  showenvironment
  showfaults [-v]
  showfru [-g lines] [-s-d] [FRU]
  showlogs [-b lines-e lines-v] [-g lines] [-p logtype[rp]]
  shownetwork [-v]
  showplatform [-v]
ALOM Configuration commands:
  setdate <[mmdd]HHMM  mmddHHMM[cc]yy][.SS]>
  setsc [param] [value]
  setupsc
  showdate
  showhost [version]
  showsc [-v] [param]
ALOM Administrative commands:
  flashupdate <-s IPaddr -f pathname> [-v]
  help [command]
  logout
  password
  resetsc [-y]
  restartssh [-y]
  setdefaults [-y] [-a]
  ssh-keygen [-l-r] <-t {rsadsa}>
  showusers [-g lines]
  useradd 
  userdel [-y] 
  userpassword 
  userperm  [c][u][a][r]
  usershow [username]

sc> showfaults
Last POST run: SUN DEC 09 23:43:31 2007
POST status: Passed all devices

  ID FRU               Fault
   0 IOBD              Host detected fault, MSGID: SUN4-8000-4P
   1 MB                Host detected fault, MSGID: SUN4-8000-4P

sc> showfaults -v
Last POST run: SUN DEC 09 23:43:31 2007
POST status: Passed all devices

  ID Time              FRU               Fault
   0 JAN 03 17:02:39   IOBD              Host detected fault, MSGID: SUN4-8000-4P  UUID: a4d117f0-8116-667a-c9f4-d96ad6c23   ae0
   1 JAN 03 17:02:39   MB                Host detected fault, MSGID: SUN4-8000-4P  UUID: a4d117f0-8116-667a-c9f4-d96ad6c23   ae0

sc> clearfault a4d117f0-8116-667a-c9f4-d96ad6c23ae0
Clearing fault from all indicted FRUs...
Fault cleared.

sc> showfaults
Last POST run: SUN DEC 09 23:43:31 2007
POST status: Passed all devices
No failures found in System