Emerson Unidrive M100 Control User Manual page 89

Safety Product Mechanical
information information installation
Trip
Oht.P Power stage over temperature
This trip indicates that a power stage over-temperature has been detected. From the sub-trip 'xxyzz', the Thermistor
location is identified by 'zz'.
Power system
Recommended actions:
• Check enclosure / drive fans are still functioning correctly
22
• Force the heatsink fans to run at maximum speed
• Check enclosure ventilation paths
• Check enclosure door filters
• Increase ventilation
• Reduce the drive switching frequency
• Reduce duty cycle
• Increase acceleration / deceleration rates
• Use S ramp (Pr 02.006)
• Reduce motor load
• Check the derating tables and confirm the drive is correctly sized for the application.
• Use a drive with larger current / power rating
OI.A1 Analog input 1 over-current
189 Current input on analog input 1 exceeds 24mA.
OI.AC Instantaneous output over current detected
The instantaneous drive output current has exceeded VM_DRIVE_CURRENT_MAX.
This trip cannot be reset until 10s after the trip was initiated.
Recommended actions/checks:
• Increase acceleration/deceleration rate
3
• If seen during autotune reduce the voltage boost
• Check for short circuit on the output cabling
• Check integrity of the motor insulation using an insulation tester
• Is the motor cable length within limits for the frame size?
• Reduce the values in the current loop gain parameters
OI.br Braking IGBT over current detected: short circuit protection for the braking IGBT activated
The OI.br trip indicates that over current has been detected in braking IGBT or braking IGBT protection has been activated.
This trip cannot be reset until 10s after the trip was initiated.
Recommended actions:
4
• Check brake resistor wiring
• Check braking resistor value is greater than or equal to the minimum resistance value
• Check braking resistor insulation
OI.SC Output phase short-circuit
Over-current detected on drive output when enabled. Possible motor ground fault.
Recommended actions:
228
• Check for short circuit on the output cabling
• Check integrity of the motor insulation using an insulation tester
• Is the motor cable length within limits for the frame size?
Unidrive M100 / M101 Control User Guide
Issue Number: 1
Electrical Getting
installation started parameters
Source xx
01
Drive size
1 to 4
Basic Running the
Optimization
motor
Diagnosis
y zz
0 zz Thermistor location in the drive defined by zz
Trip temperature (°C)
95
Advanced
NV Media Card Diagnostics
parameters
Description
Trip reset temperature (°C)
90
UL Listing
89