202 Rockwell Automation Publication D2-3518-4 - January 2020
Chapter 10 Troubleshooting the Drive
IR Volts Range 77 The drive autotuning default is Calculate, and the value
calculated for IR Drop Volts is not in the range of
acceptable values.
Re-enter motor nameplate data.
IXo Voltage-
Range
87 Ixo voltage calculated from motor nameplate data is too
high.
1. If Ixo calculation is not needed, disable it by clearing bit 2 of Compensation
(inverter parameter 56), then clear fault.
2. If Ixo calculation is needed, re-enter motor nameplate data, and, if necessary,
repeat Autotune (inverter 61).
Line Feq Lost 228 Line frequency not in the range of 47...63 Hz. 1. Verify line frequency.
2. Check line voltage feedback wiring and signal path: includes line
synchronization board, AC Line I/O board, Rectifier control board.
Low DC Bus 223 The DC bus voltage is too low. Verify proper input voltage.
Motor I Imbalance 37 The motor current imbalance displayed in inverter
Imbalance Count (221) has exceeded inverter Imbalance
Limit (49) for time configured in inverter Imbalance Time
(50).
Clear fault.
Motor Overload 7
Internal electronic overload trip.
Enable/disable with inverter Fault Config 1 (238).
An excessive motor load exists. Reduce load so drive output current does not
exceed the current set by inverter Motor OL Amps (48).
Not At Voltage 237 The rectifier did not regulate to the desired bus voltage
within the defined time.
1. Verify that rectifier is currently synchronized to the AC line.
2. Check all fuses and cabinet wiring.
3. Replace line sync board.
4. Replace AC Line I/O board.
5. Replace rectifier control board and/or rectifier power board.
OverSpeed Limit 25 Functions such as slip compensation or bus regulation
have attempted to add an output frequency adjustment
greater than that programmed in inverter Overspeed
Limit (83).
Remove excessive load or overhauling conditions or increase inverter Overspeed
Limit (83).
OverVoltage 5 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.
Parameter Chksum 100 The calculated checksum does not match the stored
checksum for inverter parameter values read from
non-volatile memory on the inverter control board.
This fault can be cleared by writing a nonzero value to
inverter Reset To Defaults parameter (197).
1. Restore inverter defaults using inverter Reset To Defaults parameter (197).
2. Reload user set if used, or reprogram inverter parameters.
3. If fault recurs, replace inverter control board.
Params Defaulted 48 The drive was commanded to write default values to all
inverter parameters.
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.
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.
Phase VW Short 42
Phase UW Short 43
Port 1...5 Adapter 71
72
73
74
75
The network card connected to DPI port stopped
communicating on its external network.
The fault code indicates the offending port number
(71 = port 1, etc.).
1. Check communication board for proper connection to external network.
2. Check ex
ternal wiring to module on port.
3. Verify external network fault.
Port 1...5 DPI Loss 81
82
83
84
85
DPI port stopped communicating via DPI, or an attached
peripheral with control capabilities was removed. Fault
82 indicates specifically that the rectifier stopped
communicating with the inverter.
1. If DPI device was not intentionally disconnected, check wiring to the port.
Replace wiring, port expander, peripherals, communications interface board,
or inverter control board as required.
2. If fault 82 occurs, check wiring between communications interface board and
the two control boards. Replace communications interface board, rectifier
control board, or inverter control board as required.
Table 21 - Fault Descriptions and Corrective Actions (Frame 3) (Continued)
Fault
No.
Type
Description Action
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