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Trouble Shooting
NO. FAULT
TYPE DESCRIPTION
ACTION
F33
Auto Rstrt Tries
2
Drive unsuccessfully
attempted to reset a fault
and resume running for
the programmed number
of A451 [Auto Rstrt Tries]
Correct the cause of the fault and manually clear.
F38
Phase U to Gnd
2
A phase to ground fault
has been detected
between the drive and the
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
2
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
1
Programmed A448 [SW
Current Trip] has been
exceeded.
Check load requirements and A448 [SW Current
Trip] setting
F64
Drive Overload
2
Drive rating of 150%
for 1 minute or 200%
for 3 seconds has been
exceeded.
Reduce load or extend Accel Time.
F70
Power Unit
2
Failure has been detected
in the drive power section.
1. Cycle power.
2. Replace drive if fault cannot be cleared.
F81
Comm Loss
2
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 C304 [Comm Loss Action].
