Omron VARISPEED G7 Instruction Manual page 353

Display
Installed Braking Resistor Over-
RH
heating
DynBrk
Braking resistor protection function
Resistor
set in L8-01 has operated.
Internal Braking Transistor Fault
RR
DynBrk The braking transistor is not operating
Transistr properly.
Motor Overload
OL1
The motor overload protection func-
Motor
tion has operated based on the internal
Overloaded
electronic thermal value.
Inverter Overload
OL2
The Inverter overload protection func-
Inv Over-
tion has operated based on the internal
loaded
electronic thermal value.
Overtorque Detected 1
OL3
There has been a current greater than
Overtorque
the setting in L6-02 for longer than the
Det 1
setting in L6-03.
Overtorque Detected 2
OL4
There has been a current greater than
Overtorque
the setting in L6-05 for longer than the
Det 2
setting in L6-06.
High-slip Braking OL
OL7
The output frequency did not change
HSB-OL
for longer than the time set in N3-04.
Undertorque Detected 1
UL3
There has been a current less than the
Undertorq
setting in L6-02 for longer than the
Det 1
setting in L6-03.
-4
7
Table 7.1 Fault Displays and Processing (Continued)
Meaning
The deceleration time is too short and
the regenerative energy from the
motor is too large.
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.
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.
The Inverter capacity is too low.
The inertia returned to the load is too
large.
Probable Causes
• Reduce the load, increase the
• Change to a Braking Resistor
• Try turning the power supply
-
• Replace the Inverter if the fault
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
(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 that the current set-
-
• Check the mechanical system
• Make sure the load is an inertial
• Set the system so that the decel-
• Make sure that the settings in
-
• Check the mechanical system
Corrective Actions
deceleration time, or reduce the
motor speed.
Unit.
off and on.
continues to occur.
L6-02 and L6-03 are appropri-
ate.
and correct the cause of the
overtorque.
ting in L6-05 and time setting in
L6-06 are appropriate.
and correct the cause of the
overtorque.
load.
eration time that does not pro-
duce 0 V is 120 s or less.
L6-02 and L6-03 are appropri-
ate.
and correct the cause of the
overtorque.