Safety
information
Product
information
Mechanical
installation
Electrical
installation
Getting
started
Basic
parameters
Running
the motor
Optimization
NV Media Card
Operation
Onboard
PLC
Advanced
parameters
Technical
data
Diagnostics
UL listing
information
264 Unidrive M702 User Guide
Issue Number: 3
OI Snubber Snubber over-current detected
92
The OI Snubber trip indicates that an over-current condition has been detected in the rectifier snubber circuit. The reason
for the trip can be identified by the sub-trip number.
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 an insulation tester
• Fit an output line reactor or sinusoidal filter
Option Disable Option module does not acknowledge during drive mode changeover
215
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.
Recommended trip:
• Reset the trip
• If the trip persists replace the option module
Out Phase Loss Output phase loss detected
98
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
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
Over Frequency Output frequency has exceeded the maximum frequency threshold
222 The Over Frequency trip indicates that the output frequency has exceeded 560 Hz for more than 4 ms.
Over Speed Motor speed has exceeded the over speed threshold
7
In open loop mode, if the Output Frequency (05.001) exceeds the threshold set in Over Speed Threshold (03.008) in either
direction an Over Speed trip is produced. In RFC-A and RFC-S mode, if the Speed Feedback (03.002) exceeds the Over
Speed Threshold in Pr 03.008 in either direction an Over Speed trip is produced. If Pr 03.008 is set to 0.0 the threshold is
then equal to 1.2 x the value set in Pr 01.006.
In RFC-A and RFC-S mode, if an SSI encoder is being used and Pr 03.047 is set to 0 an Over Speed trip will be produced
when the encoder passes through the boundary between its maximum position and zero.
Recommended actions:
• Reduce the Speed Controller Proportional Gain (03.010) to reduce the speed overshoot (RFC-A, RFC-S modes only)
• If an SSI encoder is being used set Pr 03.047 to 1
Trip Diagnosis
Source xx y zz Description
Power
system
Power
module
number
Rectifier
number
00 Rectifier snubber over-current trip detected.
To Next Page
Loading...
