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8 Troubleshooting
8 Troubleshooting
Problems with the option interface may trigger an operator error.
Refer to the SF-520 Technical Manual for errors not listed in this
manual.
◆
Fault
LED Operator
Display
Fault Name
oFA01
Option Unit Fault
Cause
Possible solution
The option unit is not
properly connected
to the drive
Turn the power off and reconnect the
option unit
LED Operator
Display
Fault Name
oPE05
Frequency Reference Selection Error
Cause
Possible solutions
Frequency reference
is assigned to an
option (b1-01 = 03)
that is not connected
to the drive
• Make sure that parameter b1-01 is set
properly
• Reconnect the option unit to the drive
