10-4
LED display
Description
Cause
Possible solutions
OT
Over torque
detection
Inverter output torque is
higher than 08-15 (over
torque detection level) for the
time specified in 08-16.
Parameter 08-14 = 0 to
activate.
Load too heavy.
Check over torque
detection parameters
(08-15 / 08-16).
Check and reduce motor
load, check and operation
duty cycle.
Comm. Error
No Modbus communication
received for the time
specified in 09-06
(communication error
detection time).
Active when 09-07(= 0 to 2).
Connection lost or wire broken.
Host stopped communicating.
Check connection.
Check host computer /
software.
PID feedback
loss
PID feedback signal falls
below level specified in 10-12
(PID feedback loss detection
level) for the time specified in
10-13 (Feedback loss
detection time). Active when
parameter (10-11 = 2).
Feedback signal wire broken
Feedback sensor broken.
Check feedback wiring.
Replace feedback
sensor.
Safety 1
Error
STO terminal 1 error
Terminal board Input SF1 and SG
are not connected
Check SF1 and SG
Connection.
Safety 2
Error
STO terminal 2 error
Terminal board Input SF2 and SG
are not connected
Check SF2 and SG
Connection.
Safety 3
Error
STO terminal 3 error
Transformer voltage output of
inverter is not stable.
Replace the power board
Contact with TECO