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110 BBV28581 05/2010
Diagnostics and Troubleshooting
Fault detection codes that can be cleared with the automatic restart function, after
the cause has disappeared (continued)
Code
Name Possible causes Remedy
PHF Input phase loss • Drive incorrectly supplied or a fuse
blown
• Failure of one phase
• 3-phase ATV12 used on a single-
phase line supply
• Unbalanced load
• This protection only operates with
the drive on load
• Check the power connection and the fuses.
• Use a 3-phase line supply.
• Disable the fault by setting Input Phase loss detection
IPL page 94
= nO.
SCF5 Load short circuit • Short-circuit at drive output
• Short circuit detection at the run
order or DC injection order if
parameter IGBT test Strt page
95
is set to YES
• Check the cables connecting the drive to the motor, and
the motor’s insulation
SLF1 Modbus
communication
• Interruption in communication on
the Modbus network
• Check the connections of communication bus.
• Check the time-out (Modbus time out ttO parameter
page 97
)
• Refer to the Modbus user manual
SLF2 SoMove
communication
• Communication interruption with
SoMove
• Check the SoMove connecting cable.
• Check the time-out
SLF3 HMI communication • Communication interruption with
the external display terminal
• Check the terminal connection
SPIF PI Feedback detected
fault
• PID feedback below lower limit • Check the PID function feedback
• Check the PI feedback supervision threshold LPI and
time delay tPI, page 76
.
ULF Process underload
fault
• Process underload
• Motor current below the
Application Underload threshold
LUL parameter page 55
during a
period set by Application
underload time delay ULt
parameter page 55
to protect the
application.
• Check the process and the parameters of the drive to be
in phase
tJF IGBT overheat • Drive overheated
• IGBT internal temperature is too
high according to ambient
temperature and load
• Check the size of the load/motor/drive.
• Reduce the Switching frequency SFr page 59
.
• Wait for the drive to cool before restarting