F
AULT
TRACING
VACON
•
33
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5
9
Undervoltage
The DC-link voltage has gone
below the internal safety limit:
• most probable cause: supply
voltage is too low
• frequency converter internal
fault
• Power outages
In case of temporary sup-
ply voltage break reset the
fault and restart the fre-
quency converter. Check
the supply voltage. If it is
adequate, an internal fail-
ure has occurred.
Contact the distributor
near to you.
11
Output phase fault
Current measurement has
detected that there is no cur-
rent in one motor phase.
Check motor cable and
motor.
13
Frequency
converter
low
temperature
IGBT switch temperature is
below
-10
°C
Check the ambient tem-
perature.
14
Frequency
converter
overheating
IGBT switch temperature is
above
120
ºC. Overheating warn-
ing is
issued when IGBT switch
temperature exceeds 110
ºC.
Check that the cooling air
flow
is not blocked.
Check ambient tempera-
ture.
Make sure that the
switching
frequency is not
too high in
relation to
ambient
temperature and
motor load.
15
Motor stalled
Motor stall protection has been
activated.
Check motor
16
Motor
overheating
Motor overheating has been
detected by frequency converter
motor temperature model. Motor
is overloaded.
Decrease the motor load.
If no motor overload
exists,
check the temper-
ature model
parameters.
17
Underload
The motor is underloaded.
Eg.
lack of input water.
Check the load and
parameters related to
underload detection (P6.5
-
P6.8)
22
EEPROM fault
Parameter save fault
• faulty operation
• component failure
Contact the nearest
dis-
tributor.
25
Microcontroller
watchdog fault
• faulty operation
• component failure
Reset the fault and
restart.
If the fault recurs, contact
the nearest distributor.
Fault
code
Fault name
Possible cause
Correcting actions
Table 5.1: Fault codes
