Rockwell Automation 20B PowerFlex 700 AC Drives Vector Control (v4.001 and up) User Manual
Page 88
88
Rockwell Automation Publication 20B-UM002G-EN-P - July 2014
Chapter 2
Troubleshooting
Output PhaseLoss
21
Current in one or more phases has been
lost or remains below a preset level.
Check the drive and motor wiring. Check
for phase-to-phase continuity at the
motor terminals. Check for disconnected
motor leads.
OverSpeed Limit
25
1 Functions such as Slip Compensation or
Bus Regulation have attempted to add
an output frequency adjustment
greater than that programmed in
[Overspeed Limit].
Remove excessive load or overhauling
conditions or increase [Overspeed Limit].
OverVoltage
5
1 DC bus voltage exceeded maximum
value.
Monitor the AC line for high line voltage or
transient conditions. Bus overvoltage can
also be caused by motor regeneration.
Extend the decel time or install dynamic
brake option.
Parameter Chksum
100
2 The checksum read from the board does
not match the checksum calculated.
1. Restore defaults.
2. Reload User Set if used.
Params Defaulted
48
The drive was commanded to write
default values to EEPROM.
1. Clear the fault or cycle power to the
drive.
2. Program the drive parameters as
needed.
Phase U to Grnd
38
A phase to ground fault has been
detected between the drive and motor
in this phase.
1. Check the wiring between the drive
and motor.
2. Check motor for grounded phase.
3. Replace drive.
Phase V to Grnd
39
Phase W to Grnd
40
Phase UV Short
41
Excessive current has been detected
between these two output terminals.
1. Check the motor and drive output
terminal wiring for a shorted condition.
2. Replace drive.
Phase VW Short
42
Phase UW Short
43
Port 1-6 DPI Loss
(Port 6)
81-
86
2 DPI port stopped communicating.
A SCANport device was connected to a
drive operating DPI devices at 500k
baud.
1. If adapter was not intentionally
disconnected, check wiring to the port.
Replace wiring, port expander,
adapters, Main Control Board or
complete drive as required.
2. Check HIM connection.
3. If an adapter was intentionally
disconnected and the [Logic Mask] bit
for that adapter is set to “1”, this fault
will occur. To disable this fault, set the
[Logic Mask] bit for the adapter to “0.”
Port 1-6 Adapter
(Port 6)
71-
76
The communications card has a fault.
Check DPI device event queue and
corresponding fault information for the
device.
Power Down
Csum
111
EEPROM data is corrupt on drive power
up.
Clear the fault or cycle power to the drive.
Power Loss
3
1
3
DC bus voltage remained below 85% of
nominal for longer than [Power Loss
Time]. Enable/Disable with [Fault
Config 1] on
.
Monitor the incoming AC line for low
voltage or line power interruption.
Power Unit
70
One or more of the output transistors
were operating in the active region
instead of desaturation. This can be
caused by excessive transistor current
or insufficient base drive voltage.
1. Check for damaged output transistors.
2. Replace drive.
Pulse In Loss
92
Z Channel is selected as a pulse input
and no signal is present.
1. Check wiring.
2. Replace pulse generator.
Pwr Brd Chksum1
104
The checksum read from the EEPROM
does not match the checksum
calculated from the EEPROM data.
Clear the fault or cycle power to the drive.
Fault
No
.
Ty
pe
(1)
Description
Action
v6
v6
v6