Emerson E300 Series Design Manual page 466

Safety Product Mechanical
information information installation
Trip
Rectifier over temperature
OHt Rectifier
OHt Rectifier trip indicates that a rectifier over-temperature has been detected. The thermistor location can be identified
from the sub-trip number.
Power system
Recommend actions:
• Check enclosure / drive fans are still functioning correctly
102
• Check enclosure ventilation paths, door filters
• Check the motor and motor cable insulation with an insulation tester
• Force the heatsink cooling fans to run at maximum speed
• Increase ventilation
• Decrease acceleration / deceleration rates
• Reduce motor load
• Reduce duty cycle
• Install an output line reactor or sinusoidal filter
OI ac Instantaneous output over current detected
The OI ac trip indicates the instantaneous drive output current has exceeded VM_DRIVE_CURRENT_MAX.
Source
Control
system
Power
system
Recommended actions:
• Check correct motor set-up
• Check correct motor connections
• Check for short circuit on the output cabling
3
• Check for control sequence of output motor contactors
• Check for control sequence of any output shorting contactor
• Check integrity of the motor insulation using an insulation tester
• Check correct operation of motor mechanical brake
• Check feedback device mechanical coupling
• Check feedback device wiring
• Check feedback signals are free from noise
• Has the phase angle autotune been completed (RFC-S)
• If seen during autotune reduce the voltage boost (Open loop, RFC-A)
• Reduce speed loop gains (I01, I02, I06 and I07 run and stop) – (Closed loop operation)
• Reduce current loop gains (I03, I04, I08 and I09 run and stop)
• Acceleration/deceleration rate is too short
OI Brake Braking IGBT over current detected: short circuit protection for the braking IGBT activated
OI Brake trip indicates an over current has been detected in the brake IGBT or the brake IGBT protection has activated.
4
Recommended actions:
• Check the brake resistor installation, wiring
• Check any external brake resistor protection
• Check brake resistor value is > the minimum brake resistance value for the drive model
OI dc Power module over current detected from IGBT "ON" state voltage monitoring
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 output and check both motor and motor cable with an insulation tester
• Replace the drive
466
Electrical Getting
User Menu A Commissioning
installation started
Source xx
01
xx
00
01
Source xx
Power
01
system
Advanced
Parameters
Diagnosis
y
Rectifier number
y zz
Rectifier
number
Instantaneous over-current trip when the measured a.c.
00
current exceeds VM_DRIVE_CURRENT[MAX].
0
y zz
0 00
Diagnostics Optimization CT MODBUS RTU Technical Data
zz Description
zz Thermistor location defined by zz
Description
Description
Braking IGBT instantaneous over-current trip
E300 Design Guide
Issue Number: 1