Troubleshooting
9.1.1 Fault Detection
9-4
Fault Display Corrective ActionsProbable CausesMeaning
OL4
Overtorque det 2
Overtorque 2
There has been a current greater than
the setting in L6-05 for longer than
the setting in L6-06.
---
S
Make sure that the current setting in
L6-05 and time setting in L6-06 are
appropriate.
S
Check the mechanical system and
correct the cause of the overtorque.
Overspeed
The speed has been greater than the
Overshooting/Undershooting are oc-
curring.
Adjust the gain again.
OS
Over speed
setting in F1-08 for longer than the
setting in F1-09.
The reference speed is too high.
Check the reference circuit and refer-
ence gain.
The settings in F1-08 and F1-09
aren’t appropriate.
Check the settings in F1-08 and
F1-09.
PG Disconnection Detected
There is a break in the PG wiring. Fix the broken/disconnected wiring.
PG pulses aren’t being input due to
the followin
conditions:
The PG is wired incorrectly. Fix the wiring.
PG open
The status has exceeded F1-14 time.
Power isn’t being supplied to the PG. Supply power to the PG properly.
Flux vector: Soft start output ≥ 2%
Flux V/f: Soft start output ≥ E1-09
---
Check for open circuit when using
brake (motor).
Excessive Speed Deviation
The load is too heavy. Reduce the load.
After the actual (motor) speed and the
reference speed agree (depending on
−
-
The acceleration time and decelera-
tion time are too short.
Lengthen the acceleration time and
deceleration time.
DEV
−
,
-
ation changes so it is greater than the
The load is locked. Check the mechanical system.
Speed Deviation
setting in F1−10 for longer than the
setting in F−11.
The settings in F1-10 and F1-11
aren’t appropriate.
Check the settings in F1-10 and
F1-11.
---
Check for open circuit when using
brake (motor).
CF
Out of Control
Control Fault
The torque limit was reached contin-
uously for 3 seconds or longer during
a deceleration stop during open-loop
vector control.
--- Check the motor constants.
Zero Servo Fault
The torque limit is too small. Increase the limit.
SVE
The rotation position moved during
The load torque is too large. Reduce the load torque.
ero
ervo
au
.
--- Check for signal noise.
OPR
Oper Disconnect
Operator Connection Fault
The Operator was disconnected dur-
ing operation started by a run com-
mand from the Operator.
--- Check the Operator connection.
EF0
Opt External Flt
External fault input from Transmis-
sion Option Card.
---
Check the Transmission Option Card
and transmission signal.
EF3
External Fault 3
External fault (Input terminal 3)
EF4 External fault (Input terminal 4)
S
Reset external fault inputs to the
EF5 External fault (Input terminal 5)
An “external fault” was input from a
-
multi-function inputs.
EF6 External fault (Input terminal 6)
mu
-
unc
on
npu
.
S
Remove the cause of the external
fault.
EF7 External fault (Input terminal 7)
EF8 External fault (Input terminal 8)
CPF00
Operator Communications Error 1
Communications with the Operator
The Digital Operator’s connector isn’t
connected properly.
Disconnect the Digital Operator and
then connect it again.
COM-ERR (OP&INV)
were not established within 5 seconds
after the power was turned on.
The Inverter’s control circuits are
faulty.
Replace the Inverter.
CPF01
Operator Communications Error 2
After communications were estab-
The Digital Operator isn’t connected
properly.
Disconnect the Digital Operator and
then connect it again.
COM-ERR (OP&INV)
lished, there was a transmission error
with the Digital Operator for more
than 2 seconds.
The Inverter’s control circuits are
faulty.
Replace the Inverter.
CPF02
Baseblock circuit error
---
Try turning the power supply off and
on again.
BB Circuit Err
The control circuit is damaged. Replace the Inverter.
9
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