Fault
code
Fault
Subcode in
T.14
Possible cause How to correct the fault
9 * Undervoltage S1 = DC-
link too low
during run
The DC-link voltage is lower
than the limits.
•
too low a supply volt-
age
•
AC drive internal fault
•
a defective input fuse
•
the external charge
switch is not closed
If there is a temporary supply volt-
age break, reset the fault and start
the drive again. Do a check of the
supply voltage. If the supply voltage
is sufficient, there is an internal
fault. Ask instructions from the dis-
tributor near to you.
S2 = No
data from
power unit
S3 =
Undervolt-
age control
supervision
10 * Input line supervi-
sion
The input line phase is
missing.
Do a check of the supply voltage,
the fuses and supply cable.
11 * Output phase
supervision
The measurement of cur-
rent tells that there is no
current in 1 motor phase.
Do a check of the motor cable and
the motor.
12 Brake chopper
supervision
There is no brake resistor.
The brake resistor is bro-
ken. A defective brake chop-
per.
Do a check of the brake resistor
and the cabling. If they are in good
condition, there is a fault in the
resistor or the chopper. Ask
instructions from the distributor
near to you.
13 Frequency con-
verter undertem-
perature
Too low a temperature in
the heatsink of the power
unit or in the power board.
The heatsink temperature is
below -10 °C (14 °F).
14 Frequency con-
verter overtem-
perature
Heatsink temperature is
over 90 °C (194 °F) (or 77 ºC
(170.6 °F), NX_6, FR6). Over-
temperature alarm is issued
when the heatsink tempera-
ture goes over 85 °C (185
°F) (72 ºC (161.6 °F)).
Do a check of the actual amount
and flow of cooling air. Examine the
heatsink for dust. Do a check of the
ambient temperature. Make sure
that the switching frequency is not
too high in relation to the ambient
temperature and the motor load.
15 * Motor stalled The motor stalled. Do a check of the motor and the
load.
16 * Motor overtemper-
ature
There is too heavy a load on
the motor.
Decrease the motor load. If there is
no motor overload, do a check of
the temperature model parame-
ters.
17 * Motor underload Motor underload protection
has tripped.
Do a check of the load.
VACON · 386 FAULT TRACING
9
TEL. +358 (0)201 2121 · FAX +358 (0)201 212 205
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