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Rockwell Automation Publication 20P-UM001I-EN-P - February 2013
Chapter 4
Troubleshooting
Fault Descriptions
Table 39 - Fault Types, Descriptions and Actions
Fault Name
Number Type
(1)
Description/Possible Cause(s)
Action(s)
AC Undervoltage
4
1
There is an undervoltage on the power circuit (can only occur
while the drive is active, i.e., running or jogging). Possible
causes include:
• Par
[UnderVolt Thresh] is set incorrectly (possibly set
to 400V when the drive is rated for 230V input power).
[UnderVolt Thresh] correctly and then reset the drive via
Par
[Fault Clear].
• The incoming voltage to the power terminals (U/V/W) of
the drive is too low due to:
• The AC input voltage is too low or one phase is missing
(< 100 Vac)
• There are poor cable connections (for example
terminals on contactor, choke, filter, etc., is not properly
connected).
• Verify AC input power level.
• Check all connections.
• The line fuses have tripped.
• The AC input voltage dips or there is a high disturbance
in the supply voltage.
1. Remove power from the drive.
2. Eliminate AC input voltage dips and/or disturbances.
3. Replace any blown fuses.
• A fuse(s) on the overvoltage clipping board has blown
(frame D drives only).
Check the fuses on the overvoltage clipping board and replace as
necessary.
Note: This fault will also occur if the control board is separately powered and started without AC input voltage.
Arm Overvoltage
5
1
There is an overvoltage on the armature circuit (125% of Par
). Possible causes include:
• Par 175 [Rated Motor Volt] is set too low.
Set Par
[Rated Motor Volt] correctly.
• The drive is not configured to use field weakening, but the
motor can only reach the set speed when the drive is in
field weakening mode.
Check the value of Par
[Field Mode Sel] and set accordingly.
Note: Configure with Par
[OverVolt Flt Cfg].
Auxiliary Input
2
1
An auxiliary input interlock is open or a voltage (+15 - 30 V)
or reference signal is missing for the digital input set to 14
“Aux Fault”.
Note: Configure with Par
[Aux Inp Flt Cfg].
Check remote wiring.
Drive Overload
64
2
The rated drive current (Par
[Drive Size]) has been
exceeded by 150% for 1 minute.
Reduce the drive current limits.
Dsp Error
132
2
A non-resettable software error exists on the control board.
Cycle power to the drive. If the problem persists, replace the control
board.
EEPROM Error
100
2
One of the following has occurred:
• There was a problem saving parameter values.
• The control board was replaced and DIP switch S15 is set
incorrectly for the drive size.
• You have upgraded from one major firmware revision to
another (e.g., v2.xxx to v3.xxx).
Note: When this fault occurs, all parameters are reset to the
default value.
1. If the control board is new, verify that DIP switch S15 is set
correctly. See DIP Switch S15 Settings on page
.
2. Reset the fault.
3. If this fault occurs again, cycle power to the drive.
4. If the problem persists, replace the control board.
Encoder Error
92
2
An error was detected with the Encoder signal while it was
configured for use by the drive.
1. Verify the encoder wiring.
2. Verify the encoder configuration in Par
[Encoder Err Chk] and
the setting of DIP switches S20 and S21 (See DIP Switch and
Jumper Settings on page
3. Verify the encoder power supply.
Fld Current Loss
6
1
The field current is too low (less than 50% of Par 468).
Possible causes include:
• The field current regulator is currently not enabled.
Enable the field current regulator via Par
[Field Reg Enable].
• The conductors in the field circuit have been interrupted. Check the motor field wiring. Measure the resistance of the motor
and verify that it matches motor nameplate data.
• The field fuses are currently open.
Check the field fuses and replace as necessary.
Note: Configure with Par
[FldLoss Flt Cfg].
Hardware Fault
130
2
A non-resettable hardware error has occurred.
Cycle power to the drive. If the problem persists, replace the control
board.