7
vacon • 126 Control keypad
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
7.3.4.1 Fault types
In the VACON
®
NX AC drive, there are four different types of faults. These types differ from each
other on the basis of the subsequent behaviour of the drive. See Table 51.
Figure 66. Fault display
7.3.4.2
Fault codes
The fault codes, their causes and correcting actions are presented in Table 60. The shadowed faults
are A faults only. The items written in white on black background present faults for which you can
program different responses in the application. See parameter group Protections.
NOTE! When contacting distributor or factory because of a fault condition, always write down all
texts and codes on the keypad display.
Table 51. Fault types
Fault type
symbol
Meaning
A
(Alarm)
This type of fault is a sign of an unusual operating 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
(Fault)
An 'F fault' is a kind of fault that makes the drive stop. Actions
need to be taken in order to restart the drive.
AR
(Fault Autoreset)
If an 'AR fault' occurs the drive will also stop immediately. 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
(Fault Trip)
If the drive is unable to restart the motor after an AR fault an FT
fault occurs. The effect of the 'FT fault' is basically the same as
that of the F fault: the drive is stopped.
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