4-4 Troubleshooting
PowerFlex 40 Adjustable Frequency AC Drive FRN 1.xx - 7.xx User Manual
Publication 22B-UM001I-EN-E
(1)
See page 4-1 for a description of fault types.
No. Fault
Type
(1)
Description Action
F33 Auto Rstrt Tries
➁
Drive unsuccessfully attempted
to reset a fault and resume
running for the programmed
number of A092
[Auto Rstrt
Tr ies ].
Correct the cause of the fault and
manually clear.
F38 Phase U to Gnd
➁
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 if fault cannot be
cleared.
F39 Phase V to Gnd
F40 Phase W to Gnd
F41 Phase UV Short
➁
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 if fault cannot be
cleared.
F42 Phase UW Short
F43 Phase VW Short
F48 Params
Defaulted
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.
F63 SW OverCurrent
➀
Programmed A098 [SW Current
Trip] has been exceeded.
Check load requirements and A098
[SW Current Trip] setting.
F64 Drive Overload
➁
Drive rating of 150% for 1 minute
or 200% for 3 seconds has been
exceeded.
Reduce load or extend Accel Time.
F70 Power Unit
➁
Failure has been detected in the
drive power section.
1. Cycle power.
2. Replace drive if fault cannot be
cleared.
F71 Net Loss The communication network has
faulted.
1. Cycle power.
2. Check communications cabling.
3. Check network adapter setting.
4. Check external network status.
F80 SVC Autotune The autotune function was either
cancelled by the user or failed.
Restart procedure.
F81 Comm Loss
➁
RS485 (DSI) port stopped
communicating.
1. If adapter was not intentionally
disconnected, check wiring to the
port. Replace wiring, port
expander, adapters or complete
drive as required.
2. Check connection.
3. An adapter was intentionally
disconnected.
4. Turn off using A105
[Comm Loss
Action].
22B-UM001.book Page 4 Tuesday, May 30, 2017 5:22 PM
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