TREND NX Variable Speed Drives User Manual
Page 97
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CONTROL KEYPAD
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7
Fault
code
Fault
Possible cause
Correcting measures
9
Undervoltage
DC-link voltage is under the voltage limits
defined in Table 4-7.
− most probable cause: too low a supply
voltage
− frequency converter internal fault
In case of temporary supply voltage
break reset the fault
and restart
the frequency converter. Check the
supply voltage. If it is adequate, an
internal failure has occurred.
Contact the distributor near to you.
Please visit:
10
Input line
supervision
Input line phase is missing.
Check supply voltage and cable.
11
Output phase
supervision
Current measurement has detected that
there is no current in one motor phase.
Check motor cable and motor.
12
Brake chopper
supervision
− no brake resistor installed
− brake resistor is broken
− brake chopper failure
Check brake resistor.
If the resistor is ok, the chopper is
faulty. Contact the distributor near to
you.
Please visit:
13
Frequency con-
verter under-
temperature
Heatsink temperature is under –10°C
14
Frequency con-
verter
overtemperature
Heatsink temperature is over 90°C (or
77ºC, NX_6, FR6).
Overtemperature warning is issued when
the heatsink temperature exceeds 85°C
(72ºC).
Check the correct amount and flow of
cooling air.
Check the heatsink for dust.
Check the ambient temperature.
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 tripped.
Check motor.
16
Motor over-
temperature
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
temperature model parameters.
17
Motor
underload
Motor underload protection has tripped.
22
EEPROM
checksum fault
Parameter save fault
− faulty operation
− component failure
24
Counter fault
Values displayed on counters are
incorrect
25
Microprocessor
watchdog fault
− faulty operation
− component failure
Reset the fault
and restart.
Should the fault re-occur, contact the
distributor near to you.
Please visit:
26
Start-up
prevented
Start-up of the drive has been prevented.
Cancel prevention of start-up.
29
Thermistor
fault
The thermistor input of option board has
detected increase of the motor
temperature
Check motor cooling and loading
Check thermistor connection
(If thermistor input of the option board is
not in use it has to be short circuited)
31
IGBT temperature
(hardware)
IGBT Inverter Bridge overtemperature
protection has detected too high a short
term overload current
Check loading.
Check motor size.