Emerson Unidrive M400 User Manual page 183

Safety Product Mechanical
information information installation
OI Snubber 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.
• Fit an output line reactor or sinusoidal filter
OI.Brake Braking IGBT over current detected: short circuit protection for the braking IGBT activated
The OI.Brake trip indicates that over current has been detected in braking IGBT or braking IGBT protection has been
activated.
Source
Power
4
system
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
Option Disable Option module does not acknowledge during drive mode changeover
The Option Disable trip indicates that the option module did not acknowledge notifying the drive that communications with
the drive has been stopped during the drive mode changeover with in the allocated time.
215 Recommended trip:
• Reset the trip
• If the trip persists replace the option module
Out Phase Loss Output phase loss detected
The Out Phase Loss trip indicates that a phase loss has been detected at the drive output. If Output Phase Loss Detection
Enable (06.059) = 1 then output phase loss is detected as follows:
1. When the drive is enabled short pulses are applied to make sure each output phase is connected.
2. During running the output current is monitored and the output phase loss condition is detected if the current contains
98
more than TBD % negative phase sequence current for TBDs.
Recommended action:
• Check motor and drive connections
• To disable the trip set Output Phase Loss Detection Enable (06.059) = 0
Output phase s/c 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?
Over Speed Motor frequency has exceeded the over frequency threshold
In open loop mode, if the Output Frequency (05.001) exceeds the threshold set in the Over Frequency Threshold (03.008)
in either direction an O.Spd trip is produced. In RFC-A mode, if the estimated frequency (03.002) exceeds the Over
Frequency Threshold in Pr 03.008 in either direction an O.Spd trip is produced. If Pr 03.008 is set to 0.0 the threshold is
7
then equal to 1.2 x the value set in Pr 01.006.
Recommended actions:
• Reduce the Frequency Controller Proportional Gain (03.010) to reduce the speed overshoot (RFC-A mode only)
Unidrive M400 User Guide
Issue Number: 2
Electrical Getting Basic Running
installation started parameters the motor
xx y zz
01 1 00: Rectifier snubber over-current trip detected.
xx y
01 0
NV Media Card Onboard
Optimization
Operation PLC
zz
00 Braking IGBT instantaneous over-current trip
Advanced
Technical data Diagnostics
parameters
Description
UL listing
information
183