Nx Networks NX series user manual 5986, Fault type symbol Meaning

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Control keypad 59(86)

Fault type symbol	Meaning
A	This type of fault is a sign of an unusual operating
(Alarm)	condition. It does not cause the drive to stop, nor does it
	require any special actions. The 'A fault' remains in the
	display for about 30 seconds.
F	An 'F fault' is a kind of fault that makes the drive stop.
(Fault)	Actions need to be taken in order to restart the drive.
AR	If an 'AR fault' occurs the drive will also stop immediately.
(Fault Autoreset)	The fault is reset automatically and the drive tries to
	restart the motor. Finally, if the restart is not successful, a
	fault trip (FT, see below) occurs.
FT	If the drive is unable to restart the motor after an AR fault
(Fault Trip)	an FT fault occurs. The effect of the 'FT fault' is basically
	the same as that of the F fault: the drive is stopped.
Table 7-2. Fault types