9
vacon • 146
Fault tracing
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
9.
F
AULT
TRACING
9.1
Fault codes
When a fault is detected by the AC drive control electronics, the drive is stopped and the symbol F
together with the ordinal number of the fault, the fault code and a short fault description appear on
the display. The fault can be reset with the Reset button on the control keypad or via the I/O terminal.
The faults are stored in the Fault history menu (M5) which can be browsed. The different fault codes
you will find in the table below.
The fault codes, their causes and correcting actions are presented in the table below. The shadowed
faults are A faults only. The faults written in white on black background may appear as both A and F
fault.
Table 60. Fault codes
Fault
code
Fault
Possible cause
Correcting measures
1
Overcurrent
AC drive has detected too high a current
(> 4*IH) in the motor cable:
-
sudden heavy load increase
-
short circuit in motor cables
-
unsuitable motor
Subcode in T.14:
S1 = Hardware trip
S3 = Current controller supervision
Check loading.
Check motor.
Check cables.
2
Overvoltage
The DC-link voltage has exceeded the
limits defined in Table 9.
-
too short a deceleration time
-
high overvoltage spikes in supply
Subcode in T.14:
S1 = Hardware trip
S2 = Overvoltage control supervision
Make the deceleration time
longer. Use brake chopper or
brake resistor (available for
most chassis as options)
3
Earth fault
Current measurement has detected that
the sum of motor phase current is not
zero.
-
insulation failure in cables or
motor
Check motor cables and
motor.
5
Charging switch
The charging switch is open, when the
START command has been given.
-
faulty operation
-
component failure
Reset the fault and restart.
Should the fault re-occur,
contact your local distributor.
6
Emergency stop
Stop signal has been given from the
option board.
Check emergency stop
circuit.
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