PowerFlex Digital DC Drive User Manual - Publication 20P-UM001C-EN-P - July 2008
4-4 Troubleshooting
Fault Descriptions
Table 4.A Fault Types, Descriptions and Actions
Fault No. Type
(1)
Description Action
AC Undervoltage 4
➀
There is an undervoltage on the power circuit.
Possible causes include:
• Par 481 [UnderVolt Thresh] is set incorrectly
(possibly set to 400V when the drive is rated for
230V input power).
Set Par 481
[UnderVolt Thresh] correctly and then
reset the drive via Par 1347
[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
• There are poor cable connections (e.g.
terminals on contactor, choke, filter, etc., is
not properly connected).
• Verify AC input power level.
• Check all connections.
• The incoming voltage to the control power
terminals (U2, V2) is too low due to:
• The AC input voltage is too low
• There are poor cable connections.
• The fuse(s) on the Switching Power Supply
circuit board have blown.
• Verify AC input power level.
• Check all connections.
• Check and replace the fuse(s) if necessary.
• 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.
Arm Overvoltage 5
➀
There is an overvoltage on the armature circuit.
Possible causes include:
• Par 175
[Rated Motor Volt] is set too low. Set Par 175 [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 469
[Field Mode Sel] and set
accordingly.
Note: Configure with Par 203
[OverVolt Flt Cfg].
Auxiliary Input 2
➀
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 354
[Aux Inp Flt Cfg].
Check the remote wiring.
Drive Overload 64
➁
Drive Rating of 150% for 1 minute or 200% for 3
seconds has been exceeded
Reduce the load or extend the acceleration time.
Dsp Error 132
➁
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
➁
There was a problem saving parameter values or
there has been a control board change.
Note: When this fault occurs, the parameters will
be reset to the default settings.
1. Reset the fault.
2. If this fault occurs again, cycle power to the drive.
3. If the problem persists, replace the Control board.
Encoder Loss 91
➀
The drive is not receiving a speed feedback
signal. Possible causes include:
• The conductors of the feedback signal have
been interrupted.
Current from one or more of the feedback device wires
is not reaching the drive. Check the feedback device
wiring.
• One or several encoder channels are missing
(conductor interruption, no encoder power
supply).
Check the encoder connections and power supply.
Note: Configure with Par 478
[Spd Loss Flt Cfg].
Fld Current Loss 6
➀
The field current is too low. Possible causes
include:
• The field current regulator is currently not
enabled.
Enable the field current regulator via Par 497
[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 473
[FldLoss Flt Cfg].
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