Emerson unidrive m200 User Manual page 189

Safety Product Mechanical
information information installation
Trip
OI.AC Instantaneous output over current detected
The instantaneous drive output current has exceeded VM_DRIVE_CURRENT_MAX.
Source
Control
system
3
Recommended actions/checks:
• Increase acceleration/deceleration rate
• 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 frequency loop gain parameters - (Pr 03.010, 03.011, 03.012) or (Pr 03.013, 03.014, 03.015)
• 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.
Source
Power
system
4
Recommended actions:
• Check brake resistor wiring
• Check braking resistor value is greater than or equal to the minimum resistance value
• Check braking resistor insulation
OI.dC Power module over current detected from IGBT on state voltage monitoring
The OI.dC trip indicates that the short circuit protection for the drive output stage has been activated.
Recommended actions:
109
• Disconnect the motor cable at the drive end and check the motor and cable insulation with an insulation tester
• Replace the drive
OI.Sn Snubber over-current detected
This trip indicates that an over-current condition has been detected in the rectifier snubbing circuit, The exact cause of the
trip can be identified by the sub-trip number.
Source
Power
system
92
Recommended actions:
• Ensure the internal EMC filter is installed
• Ensure the motor cable length does not exceed the maximum for selected switching frequency
• Check for supply voltage imbalance
• Check for supply disturbance such as notching from a DC drive
• Check the motor and motor cable insulation with a Megger
• Install a output line reactor or sinusoidal filter
OI.SC Output phase short-circuit
Over-current detected on drive output when enabled. Possible motor earth 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 M200 / M201 User Guide
Issue Number: 4
Electrical Getting Basic Running the
installation started parameters
xx y
00 0
xx y
01 0
xx y
01 1
NV Media
Optimization
motor Card
Diagnosis
zz
Instantaneous over-current trip when the measured a.c. current
00
exceeds VM_DRIVE_CURRENT[MAX].
zz
00 Braking IGBT instantaneous over-current trip
zz
00 Rectifier snubber over-current trip detected.
Advanced
Technical data Diagnostics
parameters
Description
Description
Description
UL Listing
189