Emerson Unidrive M400 Series User Manual page 149

Safety Product Mechanical
information information installation
Out Phase Loss Output phase loss detected
The Out Phase Loss trip indicates that phase loss has been detected at the drive output.
A test can be made for output phase loss when the drive is enabled or the output phase loss condition can be detected
while the drive is running as defined by Output Phase Loss Detection Enable (06.059).
Sub-trip
98
NOTE
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
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 Post-ramp Reference (02.001) exceeds the threshold set in the Over Frequency Threshold
(03.008) in either direction an Over Speed 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 Over Speed trip is produced. If Pr 03.008 is set to 0.00 the
threshold is then equal to 1.2 x the value set in Pr 01.006.
7
Recommended actions:
• Check that the motor is not being driven by another part of the system.
• Reduce the Frequency Controller Proportional Gain (03.010) to reduce the frequency overshoot (RFC-A mode only).
Over Volts DC bus voltage has exceeded the peak level or maximum continuous level for 15 seconds
The Over Volts trip indicates that the DC bus voltage has exceeded the VM_DC_VOLTAGE[MAX] or
VM_DC_VOLTAGE_SET[MAX] for 15 s. The trip threshold varies depending on voltage rating of the drive as shown below.
Voltage rating
Sub-trip Identification
Source
2
Control
system
Control
system
Power
system
Recommended actions:
• Increase deceleration ramp (Pr 00.004)
• Decrease the braking resistor value (staying above the minimum value)
• Check nominal AC supply level
• Check for supply disturbances which could cause the DC bus to rise
• Check motor insulation using an insulation tester
Unidrive M400 Control User Guide
Issue Number: 1
Electrical Getting Basic
installation started parameters
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.
The drive output frequency is above 4 Hz and a phase is disconnected for the time specified by Output
4
Phase Loss Detection Time (06.058)
VM_DC_VOLTAGE[MAX]
Frame 1 to 4
100 510
200 510
400 870
575 N/A
690 N/A
xx y
00 0
00 0
01 0
Running NV Media Card
Optimization
the motor Operation
Reason
VM_DC_VOLTAGE[MAX]
Frame 5 to 9
415
415
830
990
1190
01: Instantaneous trip when the DC bus voltage exceeds
VM_DC_VOLTAGE[MAX].
02: Time delayed trip indicating that the DC bus voltage is above
VM_DC_VOLTAGE_SET[MAX].
00: Instantaneous trip when the DC bus voltage exceeds
VM_DC_VOLTAGE[MAX].
Onboard Advanced
Diagnostics
PLC parameters
VM_DC_VOLTAGE_SET[MAX]
400
400
800
955
1150
zz
UL
information
149