YASKAWA Varispeed E7 Instruction Manual And Parameter Description page 251

Display
Motor Overheating Fault
The Inverter will stop according to the
setting of L1-04.
Motor Overload
The motor overload protection func-
tion has operated based on the internal
electronic thermal value.
Inverter Overload
The Inverter overload protection func-
tion has operated based on the internal
electronic thermal value.
Overtorque Detected 1
There has been a torque higher than
the setting in L6-02 for longer than the
time in L6-03.
High-slip Braking OL
The output frequency did not change
for longer than the time set in N3-04.
Undertorque Detected 1
There has been a torque lower than the
setting in L6-02 for longer than the
time in L6-03.
PI Feedback Lost
A PI feedback loss detection is
enabled (b5-12 ≠ 0) and the PI feed-
back input was less than b5-13 (PI
feedback loss detection level) for
longer than the time set in b5-14 (PI
feedback loss detection time).
External fault input from Communi-
cations Option Card
-4
7
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Table 7.1 Fault Displays and Processing (Continued)
Meaning
The motor has overheated.
The load is too heavy. The accelera-
tion time, deceleration time, and cycle
time are too short.
The V/f characteristics voltage is too
high or too low.
The Motor Rated Current (E2-01) is
incorrect.
The load is too heavy. The accelera-
tion time, deceleration time and cycle
time are too short.
The V/f characteristics voltage is too
high or too low.
The Inverter capacity is too low.
The inertia of the connected machine
is too large.
Probable Causes
Check the size of the load and the
length of the acceleration, deceler-
ation, and cycle times.
Check the V/f characteristics.
Check the motor temperature
input at terminal A2.
Check the size of the load and the
length of the acceleration, deceler-
ation, and cycle times.
Check the V/f characteristics.
Check the Motor Rated Current
Setting (E2-01).
Check the size of the load and the
length of the acceleration, deceler-
ation, and cycle times.
Check the V/f characteristics.
Replace the Inverter with one that
has a larger capacity.
• Make sure that the settings in
–
• Check the mechanical system
Make sure the load is an inertial
load.
• Make sure that the settings in
–
• Check the mechanical system
• Check the PI feedback signal
–
• Check the wiring.
Check the Communications
– Option Card and communications
signals.
Corrective Actions
L6-02 and L6-03 are appropri-
ate.
and correct the cause of the
overtorque.
L6-02 and L6-03 are appropri-
ate.
and correct the cause of the
undertorque.
source for correct operation.