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TREND NX Variable Speed Drives User Manual

Page 121

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104 • vacon

FAULT TRACING

Tel. +358 (0)201 2121 • Fax +358 (0)201 212 205

9

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:
http://www.vacon.com/wwcontacts.html

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:

http://www.vacon.com/wwcontacts.html

13

Frequency con-
verter under-
temperature

Heatsink temperature is under –10°C

14

Frequency con-
verter over-
temperature

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:

http://www.vacon.com/wwcontacts.html

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.