97
User’s manual
6.1.2 MALFUNCTIONS WITH AN ALARM: TROUBLESHOOTING
ALARM DESCRIPTION CORRECTIVE ACTION
A0.0
Over –current
alarm
It has been measured a current
greater than its limit
Check if in a transient state the active current reference is
increased to high values in a short time. Eventually increase the
current limit regulator gain.
A0.1
Motor
in stall
Drive worked in torque or current
limit for a time equal to P186
seconds
If the motor has to work in limit for a long time, disable this
alarm set C82=0 or lengthen the limit time admitted increasing
P186.
The motor is in stall because it has not been given sufficient
voltage boost at low frequencies: increase the parameter P172.
The start-up load is too high: reduce it or increase the rating of
motor and drive.
A1.0
Loaded default
parameters
EEPROM data related to a
different core
It’s possible to reset this alarm but keep attention: now all
parameters have its default value.
A1.1
EEPROM
Read failure
A Check Sum error occurred
while the EEPROM was reading
the values. Default values loaded
automatically.
Try rereading the values with the EEPROM
. The reading may have been disturbed in some way. If the
problem continues contact TDE as there must a memory
malfunction.
A1.2
EEPROM
Write failure
When data is being written in the
EEPROM the required values are
always shown afterwards: an
alarm triggers if differences are
detected.
Try rewriting the values in the EEPROM
. The information may have been disturbed in some way.
If the problem continues contact TDE as there must be a
memory malfunction.
A1.3
EEPROM
Read and write
failure
Alarms A1.1 and A1.2 appears There are some problems with EEPROM.
A2.0
Motor not
fluxed
Magnetic flux (d27) is below the
minimum flux set in P52.
Check that the motor is properly connected to the drive.
Try to increase parameter P29 (machine magnetizing waiting
time) and reduce P52 if necessary as this specifies the
minimum flux alarm threshold.
Check d27 to ensure that the flux increases when RUN is
enabled.
A3.0 Power failure
The drive output current has
reached a level that has set off an
alarm; this may be caused by an
overcurrent due to leakage in the
wires or the motor or to a short
circuit in the phases at the drive
output. There may also be a
regulation fault.
Check the connection wires on the motor side, in particular on
the terminals, in order to prevent leakages or short circuits.
Check the motor insulation by testing the dielectric strength,
and replace if necessary.
Check the drive power circuit is intact by opening the
connections and enabling RUN; if the safety switch cuts in,
replace the power. If the safety switch cuts in only during
operation, there may be a regulation problem (replace along
with current transducers) or vibrations causing transient D.C.
A4.0
Application
alarm
This alarm is application specific.
Please refer to specific
documentation
A5.0
Motor
temperature too
high
Connection C46 runs a range of
motor heat probes. If C46=1 or 2,
a PTC/NTC is being used and its
Ohm value (d41) has breached
the safety threshold (P95). If C46
= 3 a digital input has been
configured to I23 logical input
function and this input is in not
active state. If C46=4, a KTY84 is
being used: the temperature
reading (d26) must be higher than
the maximum temperature (P91).
Check the temperature reading in d26 and then check the
motor. With a KTY84, if -273.15 appears the electrical
connection towards the motor heat probe has been interrupted.
If the reading is correct and the motor is overheating, check that
the motor cooling circuit is intact. Check the fan, its power unit,
the vents, and the air inlet filters on the cabinet. Replace or
clean as necessary. Ensure that the ambient temperature
around the motor is within the limits permitted by its technical
characteristics.
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