Schneider Electric Altivar 12 Manual De Usuario

110

BBV28581  05/2010

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

 page 

nO

.

SCF5

Load short circuit

• Short-circuit at drive output
• Short circuit detection at the run 

order or DC injection order if 
parameter

 page 

 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 (

page 

)

• 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 

ULF

Process underload 
fault

• Process underload
• Motor current below the 

 parameter page 

 during a 

period set by 

 

 

parameter page 

 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 

.

• Wait for the drive to cool before restarting