Nx Networks NX series - Manual (Page 60)

60(86) Control keypad
7
7.3.4.2 Fault codes
The fault codes, their causes and corrective actions are presented in the table below. The
shadowed faults are A faults only. The faults written in white on black background may appear as
both A and F fault.
Fault
code Fault Possible cause Correcting measures
1 Overcurrent Frequency converter has detected too
high a current (>4*I
n
) in the motor cable:
−
sudden heavy load increase
−
short circuit in motor cables
−
unsuitable motor
Check loading.
Check motor.
Check cables.
2 Overvoltage The DC-link voltage has exceeded the
limits defined in Table 4-1.
−
too short a deceleration time
−
high overvoltage spikes in supply
Make the deceleration time longer. Use
brake chopper or brake resistor
(available as options)
3 Earth fault Current measurement has detected that
the sum of motor phase current is not
zero.
−
insulation failure in cables or motor
Check motor cables and motor.
5 Charging switch The charging switch is open, when the
START command has been given.
−
faulty operation
−
component failure
Reset the fault and restart.
Should the fault re-occur, contact your
nearest distributor..
6 Emergency stop Stop signal has been given from the
option board.
7 Saturation trip Very high overload
Defective component Cannot be reset from the keypad.
Switch off power. If this does not help
contact your nearest distributor.
8 System fault The frequency converter troubleshooting
system is unable to locate the fault.
Reset the fault and restart.
Should the fault re-occur, contact your
nearest distributor.
9 Undervoltage DC-link voltage is under the voltage limits
defined in.
−
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 your nearest distributor.
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 your nearest distributor..
13 Frequency
converter under-
temperature Heatsink temperature is under –10
°
C
14 Frequency
converter over
temperature Heatsink temperature is over 90
°
C.
Over temperature warning is issued when
the heatsink temperature exceeds 85
°
C.
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.