Vacon NX User Manual page 142

vacon • 140
Fault
Fault
code
14 Frequency
converter
overtemperature
15 Motor stalled
16 Motor
overtemperature
17 Motor underload
18 Unbalance
(Warning only)
22 EEPROM
checksum fault
24 Counter fault
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9
Table 55. Fault codes
Possible cause
3) Heatsink temperature is over 70 °C.
Overtemperature warning is issued when
the heatsink temperature exceeds 65 °C.
4) Circuit board temperature is over
85 ºC. Overtemperature warning is
issued when the board temperature
exceeds 75 ºC.
Subcodes:
S1 = Overtemperature warning in unit,
board or phases
S2 = Overtemperature in power board
S3 = Liquid flow
S4 = Overtemperature on ASIC board or
driver boards
Motor stall protection has tripped.
Motor overheating has been detected by
frequency converter motor temperature
model. Motor is overloaded.
Motor underload protection has tripped. Check load.
Unbalance between power modules in
paralleled units.
Subcode in T.14:
S1 = Current unbalance
S2 = DC-Voltage unbalance
Subcodes:
S1 = Firmware interface power down
variable checksum error.
S2 = Firmware interface variable check
sum error.
S3 = System power down variable check
sum error
S4 = System parameter checksum error
S5 = Application-defined powerdown,
variable checksum error.
S6 = Application-defined powerdown,
variable checksum.
S10 = System parameter checksum error
(fault history entries, device valid,
system menu parameters).
Values displayed on counters are
incorrect.
FAULT TRACING
Correcting measures
Cause 1):
Check that values for Ith
(Chapter 4.2) are not
exceeded.
Check the correct coolant
flow and temperature. Also
check the circulation for
possible leaks.
Check the ambient
temperature.
Make sure that the switching
frequency is not too high in
relation to ambient
temperature and motor load.
Cause 2):
Circulation of air in the drive
is blocked.
The cooling fans are defect.
Check motor and load.
Decrease the motor load.
If no motor overload exists,
check the temperature
model parameters.
Should the fault re-occur,
contact your local distributor.
Should the fault re-occur,
contact your local distributor.
Take a critical attitude
towards values shown on
counters.