Emerson Digitax ST - Page 188

Safety
Information
Product
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Mechanical
installation
Electrical
installation
Getting
started
Basic
parameters
Running the
motor
Optimization
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interface
SMARTCARD
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Onboard
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UL listing
information
188 Digitax ST User Guide
Issue: 5
HF25 Current feedback offset error
225 Hardware fault - return drive to supplier
HF26 Soft start relay failed to close, soft start monitor failed or braking IGBT short circuit at power up
226 Hardware fault - return drive to supplier
HF27 Power stage thermistor 1 fault
227 Hardware fault - return drive to supplier
HF29 Control board thermistor fault
229 Hardware fault - return drive to supplier
HF30 DCCT wire break trip from power module
230 Hardware fault - return drive to supplier
It.AC
Output current overload timed out (I
2
t) - accumulator value can be seen in Pr 4.19
20
Ensure the load is not jammed / sticking
Ensure that the motor rated current is not set to zero
Check the load on the motor has not changed If seen during an autotune in servo mode, ensure that the motor rated current Pr 0.46
(Pr 5.07) or Pr 21.07 is current rating of the drive
Tune the rated speed parameter
Check feedback device signal for noise
Check the feedback device mechanical coupling
It.br
Braking resistor overload timed out (I
2
t) – accumulator value can be seen in Pr 10.39
19
Ensure the values entered in Pr 10.30 and Pr 10.31 are correct
Increase the power rating of the braking resistor and change Pr 10.30 and Pr 10.31
If an external thermal protection device is being used and the braking resistor software overload is not required, set Pr 10.30 or
Pr 10.31 to 0 to disable the trip
O.CtL Drive control board over temperature
23
Check enclosure / drive fans are still functioning correctly
Check enclosure ventilation paths
Check enclosure door filters
Check ambient temperature
Reduce drive switching frequency
O.ht1 Power device over temperature based on thermal model
21
Reduce drive switching frequency
Reduce duty cycle
Decrease acceleration / deceleration rates
Reduce motor load
O.ht2 Heatsink over temperature
22
Check enclosure / drive fans are still functioning correctly
Check enclosure ventilation paths
Check enclosure door filters
Increase ventilation
Decrease acceleration / deceleration rates
Reduce drive switching frequency
Reduce duty cycle
Reduce motor load
O.ht3 Drive over-temperature based on thermal model
27
The drive will attempt to stop the motor before tripping. If the motor does not stop in 10s the drive trips immediately.
Check DC bus ripple
Decrease acceleration / deceleration rates
Reduce duty cycle
Reduce motor load
Trip Diagnosis