
Digitax HD M753 Control User Guide
241
Issue Number: 3
OI Brake
Braking IGBT over current detected: short circuit protection for the braking IGBT activated
4
The
OI Brake
trip indicates that over current has been detected in braking IGBT or braking IGBT protection has been
activated.This trip cannot be reset until 10 s after the trip was initiated.
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
109
The
OI dc
trip indicates that the short circuit protection for the drive output stage has been activated. The table below
shows where the trip has been detected. This trip cannot be reset until 10 s after the trip was initiated.
Recommended actions:
•
Disconnect the motor cable at the drive end and check the motor and cable insulation with an insulation tester
•
Replace the drive
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.
* For a parallel power-module system the rectifier number will be one as it is not possible to determine which rectifier has
detected the fault.
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
•
Install 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 to 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 phase loss has been detected at the drive output.
If Pr
05.042
= 1 the physical output phases are reversed, and so sub-trip 3 refers to physical output phase V and sub-trip 2
refers to physical output phase W.
Recommended actions:
•
Check motor and drive connections
•
To disable the trip set
Output Phase Loss Detection Enable
(06.059) = 0
Trip
Diagnosis
Source
xx
y
zz
Description
Power system
Power module number
0
00
Braking IGBT instantaneous over-current trip
Source
xx
y
zz
Control system
00
0
00
Power system
Power module number
0
00
Source
xx
y
zz
Description
Power system
01
Rectifier number*
00
Rectifier snubber over-current trip detected.
Sub-trip
Reason
1
U phase detected as disconnected when drive enabled to run.
2
V phase detected as disconnected when drive enabled to run.
3
W phase detected as disconnected when drive enabled to run.
4
Output phase loss detected when the drive is running.
NOTE
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