Here, I've just realised, same two questions two different (?) people ?
Get ADT out, they're your alarm company, or better still read your manual.
acorn, August 2011
The fault displays shown on that panel
If you can see the display you mention, please point it out
(I'm not going to print this lot again)
c1 to 8 Detector circuit open.
t1 to 8 Circuit tamper open.
o1 to 8 Detector circuit omitted (isolated).
E1 to 8 Entry via a detector circuit.
S1 to 8 Detector circuit on Soak test.
EA Alarm on entry
EF Exit fault
bF Control panel battery fault
PF Mains supply failure.
Sr System reset (Total power failure).
AP Aux. (Detector) power failure.
Lb Control panel low battery.
rt Illegal use of keypad (excess number of keypresses).
rP Remote keypad missing.
rr Total power failure (engineer reset required).
u1 to u9 User access number (U5 = Duress, U9 = Keyswitch)
AE Access Engineer
AA Arm area A (Full set).
Ab Arm area B (Part set).
Ac Arm area C (Part set)
Lt Control panel tamper.
tr External bell tamper.
cF Communications failure (External signalling).
LF Telephone line fault.
cc Communications completed successfully.
