YASKAWA Varispeed G7 User Manual

7-16
OH3
(blinking)
Motor
Over-
heat 1
Motor Overheating
E was set for H3-09 and the motor
temperature thermistor input exceeded
the alarm detection level.
The motor has overheated.
Check the size of the load and the
length of the acceleration, decelera-
tion, and cycle times.
Check the V/f characteristics.
Check the motor temperature input on
terminals A1 and A2.
OL3
(blinking)
Over-
torque
Det 1
Overtorque 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 appropriate.
• Check the mechanical system and
correct the cause of the overtorque.
OL4
(blinking)
Over-
torque
Det 2
Overtorque 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 setting in
L6-05 and time setting in L6-06 are
appropriate.
• Check the mechanical system and
correct the cause of the overtorque.
UL3
(blinking)
Under-
torq Det
1
Undertorque 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 appropriate.
• Check the mechanical system and
correct the cause of the overtorque.
UL4
(blinking)
Under-
torq Det
2
Undertorque 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 setting in
L6-05 and time setting in L6-06 are
appropriate.
• Check the mechanical system and
correct the cause of the overtorque.
OS
(blinking)
Over-
speed
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 refer-
ence gain.
The settings in F1-08 and F1-09 aren't
appropriate.
Check the settings in F1-08 and F1-09.
PGO
(blinking)
PG Open
The PG is Disconnected
The Inverter is outputting a frequency,
but PG pulses aren't being input.
There is a break in the PG wiring. Fix the broken/disconnected wiring.
The PG is wired incorrectly. Fix the wiring.
Power isn't being supplied to the PG. Supply power to the PG properly.
Brake is applied to the motor.
Check for open circuit when using
brake (motor).
DEV
(blinking)
Speed
Devia-
tion
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 large. Reduce the load.
The acceleration time and decelera-
tion 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.
Brake is applied to the motor.
Check for open circuit when using
brake (motor).
Table 7.3 Alarm Displays and Processing (Continued)
Display Meaning Probable causes Corrective Actions

YASKAWA Varispeed G7 Specifications

General

Brand	YASKAWA
Model	Varispeed G7
Category	Inverter
Language	English