Control Techniques UNIDRIVE SP1201 Guía Rápida página 44

Safety Product Mechanical
Information Information Installation
Trip
O.ht3 Drive over-temperature based on thermal model
The drive will attempt to stop the motor before tripping. If the motor does not stop in 10s the drive
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trips immediately.
Check cubicle / drive fans are still functioning correctly
Check cubicle ventilation paths
Check cubicle door filters
Increase ventilation
Decrease acceleration / deceleration rates
Reduce duty cycle
Reduce motor load
Oht4.P Power module rectifier over temperature
Check for supply imbalance
Check cubicle / drive fans are still functioning correctly
Check cubicle ventilation paths
Check cubicle door filters
102 Increase ventilation
Decrease acceleration / deceleration rates
Reduce drive switching frequency
Reduce duty cycle
Reduce motor load
OI.AC Instantaneous output over current detected: peak output current greater than 225%
Acceleration /deceleration rate is too short.
3
If seen during autotune reduce voltage boost Pr 5.15
Check for short circuit on output cabling
Check integrity of motor insulation
Check feedback device wiring
Check feedback device mechanical coupling
Check feedback signals are free from noise
Is motor cable length within limits for that frame size?
Reduce the values in speed loop gain parameters – Pr 3.10, Pr 3.11 and Pr 3.12 (closed loop
vector and servo modes only)
Has offset measurement test been completed? (servo mode only)
Reduce the values in current loop gain parameters - Pr 4.13 and Pr 4.14 (closed loop vector
and servo modes only)
OIAC.P Power module over current detected from the module output currents
Acceleration /deceleration rate is too short.
If seen during autotune reduce voltage boost Pr 5.15
Check for short circuit on output cabling
Check integrity of motor insulation
Check feedback device wiring
Check feedback device mechanical coupling
104 Check feedback signals are free from noise
Is motor cable length within limits for that frame size?
Reduce the values in speed loop gain parameters – Pr 3.10, Pr 3.11 and Pr 3.12 (closed loop
vector and servo modes only)
Has offset measurement test been completed? (servo mode only)
Reduce the values in current loop gain parameters - Pr 4.13 and Pr 4.14 (closed loop vector and
servo modes only)
Braking transistor over-current detected: short circuit protection for the braking transistor
OI.br
activated
Check braking resistor wiring
4 Check braking resistor value is greater than or equal to the minimum resistance value
Check braking resistor insulation
OIbr.P Power module braking IGBT over current
Check braking resistor wiring
103 Check braking resistor value is greater than or equal to the minimum resistance value
Check braking resistor insulation
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Electrical Getting
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Installation Started
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Diagnostics
the motor parameters
Diagnosis
Unidrive SP Short Form Guide
UL Listing
Appendix
Information
Issue Number: 1