Control Keypad
65(96)
7
7.4.5 Fault codes
The fault codes, their causes and correcting actions are presented in the table below. The shadowed
faults are A faults only. The items written in white on black background present faults for which you
can program different responses in the application. See parameter group Protections.
Note!
When you contact the factory or the distributor due to a fault, it is advisable to write down all
fault texts and codes that appear on the keypad
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 size.
Check cables.
2
Overvoltage
The DC-link voltage has exceeded the limits
defined in Table 4-3.
−
too short a deceleration time
−
high overvoltage spikes in supply
Make the deceleration time longer.
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.
8
System fault
-
component failure
-
faulty operation
Reset the fault
and restart.
Should the fault re-occur, contact
the distributor near to you.
9
Undervoltage
DC-link voltage is under the voltage limits
defined in Table 4-3.
−
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.
11
Output phase
supervision
Current measurement has detected that there
is no current in one motor phase.
Check motor cable and motor.
13
Frequency
converter under
temperature
Heatsink temperature is under –10
°
C
14
Frequency
converter
overtemperature
Heatsink temperature is over 90
°
C.
Overtemperature 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
(p2.6.8).
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.
Check that Pump or Fan is not
jammed
16
Motor
overtemperature
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.
