66
LED display Possible solutions
STO2
Safety switch
• Check SF1 / SF2 and SG
connection (For
enhanced E & G type)
• Check if 08-30 =0 and
03-00~03-07=58
SS1
Digital input
Stop command
• Check if 08-30 =0 and
03-00~03-07=58
EF0
External fault 0
• Reset Modbus
communication 0x2501
bit 2= "1"
EF1
External fault
(S1)
• Multi-function input
function set incorrectly.
• Check wiring
EF2
External fault
(S2)
EF3
External fault
(S3)
EF4
External fault
(S4)
EF5
External fault
(S5)
EF6
External fault
(S6)
EF7
External fault
(S7)
EF8
External fault
(S8)
LED display Possible solutions
CF07
Motor control
fault
• Perform rotational or
stationary auto-tune
• Increase minimum output
frequency (01-08)
CF08
Motor control
fault
• Increase the value of 22-
10 and 22-23 properly.
• Re auto-tune (22-21)
• Check if the load is too
heavy to raise torque
output limit.
FU
fuse open
• Check IGBTs
• Check for short circuit at
inverter output.
• Replace inverter.
CF00
Operator
Communication
Error
• Disconnect the operator
and then reconnect.
• Replace the control board
CF01
Operator
Communication
Error 2
• Disconnect the operator
and then reconnect.
• Replace the control board
CTER
CT Failure
• Check current
transformer signal and
the voltage on the control
board.
CF20
Communication
Failure
• Check only use one kind
of communication type.
Protection
Failure
• Remove digital input
communication run
command
External
Overload
• Check external overload.
• Reset external overload
of digital input.
4.3 Warning / Self-diagnosis
Detection Function