Emerson unidrive m200 User Manual page 188

Safety Product Mechanical
information information installation
Trip
Oht.I Inverter over temperature based on thermal model
This trip indicates that an IGBT junction over-temperature has been detected based on a software thermal model.
Control system
Recommended actions:
21
• Reduce the selected drive switching frequency
• Ensure Auto-switching Frequency Change Disable (05.035) is set to OFF
• Reduce duty cycle
• Increase acceleration / deceleration rates
• Reduce motor load
• Check DC bus ripple
• Ensure all three input phases are present and balanced
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
• Force the heatsink fans to run at maximum speed
22
• Check enclosure ventilation paths
• Check enclosure door filters
• Increase ventilation
• Reduce the drive switching frequency
• Reduce duty cycle
• Increase acceleration / deceleration rates
• 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
Oht.r Rectifier over temperature
The Oht.r trip indicates that a rectifier over-temperature has been detected. The thermistor location can be identified from
the sub-trip number.
Source
Power
system
Recommend actions:
102
• Check the motor and motor cable insulation with an insulation tester
• Fit an output line reactor or sinusoidal filter
• Force the heatsink fans to run at maximum speed by setting Pr 06.045 = 1
• Check enclosure / drive fans are still functioning correctly
• Check enclosure ventilation paths
• Check enclosure door filters
• Increase ventilation
• Increase acceleration / deceleration rates
• Reduce duty cycle
• Reduce motor load
OI.A1 Analog input 1 over-current
189 Current input on analog input 1 exceeds 24mA.
188
Electrical Getting Basic
installation started parameters
Source xx y
00 1
Source xx
01
xx y
Power module Rectifier
number number
Running the NV Media
Optimization
motor Card
Diagnosis
zz
00 Inverter thermal model gives {Oht.I} trip with sub-trip 0
y zz
0 zz Thermistor location in the drive defined by zz
zz
zz Thermistor location defined by zz
Advanced
Technical data Diagnostics
parameters
Description
Description
Description
Unidrive M200 / M201 User Guide
Issue Number: 4
UL Listing