Yaskawa Matrix Converter - Manual (Page 328)

Protective and Diagnostic Functions
7-
7
OL3
Overtorque
Det 1
Overtorque Detection 1
There has been a current greater than
the setting in L6-02 for longer than the
setting in L6-03.
-
• Make sure that the settings in
L6-02 and L6-03 are appropri-
ate.
• Check the mechanical system
and correct the cause of the
overtorque.
OL4
Overtorque
Det 2
Overtorque Detection 2
There has been a current greater than
the setting in L6-05 for longer than the
setting in L6-06.
-
• Make sure that the current set-
ting in L6-05 and time setting in
L6-06 are appropriate.
• Check the mechanical system
and correct the cause of the
overtorque.
UL3
Undertorq
Det 1
Undertorque Detection 1
There has been a current less than the
setting in L6-02 for longer than the
setting in L6-03.
-
• Make sure that the settings in
L6-02 and L6-03 are appropri-
ate.
• Check the mechanical system
and correct the cause of the
overtorque.
UL4
Undertorq
Det 2
Undertorque Detection 2
There has been a current less than the
setting in L6-05 for longer than the
setting in L6-06.
-
• Make sure that the current set-
ting in L6-05 and time setting in
L6-06 are appropriate.
• Check the mechanical system
and correct the cause of the
overtorque.
OS
Overspeed
Det
Overspeed
The speed has been greater than the
setting in F1-08 for longer than the
setting in F1-09.
Overshooting/Undershooting are
occurring.
Adjust the gain again.
The reference speed is too high.
Check the reference circuit and
reference gain.
The settings in F1-08 and F1-09 aren't
appropriate. Check the settings in F1-08 and
F1-09.
PGO
PG Open
PG Disconnect Detected
No PG pulse were input when the
MxC was outputting a frequency.
The PG wiring is broken or discon-
nected. Fix the broken/disconnected wir-
ing.
The PG is wired incorrectly. Fix the wiring.
Power isn't being supplied to the PG. Supply power to the PG properly.
-
Check for open circuit when using
brake (motor).
DEV
Speed
Deviation
Excessive Speed Deviation
The speed deviation has been greater
than the setting in F1-10 for longer
than the setting in F1-11.
The load is too heavy. Reduce the load.
The acceleration time and deceleration
time are too short. Lengthen the acceleration time
and deceleration time.
The load is locked. Check the mechanical system.
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
Ctl Fault
Control Fault
The torque limit was continuously
reached for three seconds or longer
during a decelerate to stop with Open
Loop Vector Control.
Motor parameter settings are not cor-
rect. • Check the motor parameters.
• Perform Auto-Tuning.
Table 7.1 Fault Displays and Processing (Continued)
Display Meaning Probable Causes Corrective Actions