Menu 10
Parameter
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Parameter
x.00
Parameter
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Advanced parameter
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Electronic
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Performance RFC mode
186 Unidrive SP Advanced User Guide
www.controltechniques.com Issue Number: 10
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
HF28 Power stage thermistor 2 fault, or internal fan fault (size 3)
228 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
HF31 Internal capacitor bank fan failure (size 4 and larger) or a module has not powered up in a multi-module parallel drive
231
Check the AC or DC power supply to all modules in a multi-module parallel drive
If the AC or DC power supply is present, or if this is a single drive, then there is a hardware fault - return drive to the supplier
HF32 Power stage - Identification and trip information serial code error
232 Hardware fault - return drive to the 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
Ensure rated speed parameter is correct (RFC)
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 ≤Heavy Duty current
rating of the drive
Tune the rated speed parameter (closed loop vector only)
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
L.SYnC Drive failed to synchronize to the supply voltage in Regen mode
39 Refer to the Diagnostics chapter in the Unidrive SP Regen Installation Guide.
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
Trip Diagnosis