RE: ICU-L Led code
My manual shows three codes:
Fast blinking after power up = battery test running
Fast blinking (5 seconds after power up = battery voltage low
One short flash persecond= sleep mode.
I have the original instruction sheet and the new one available on Pe's web site and neither mention the LED on permanatly state. Sorry not to be any help on this.
Mike
EDIT: just thought of one other place I can check, hold on.