Omron VARISPEED L7 Manual page 249

Display
OH
Heatsink Overtemp
OH1
Heatsink Max Temp
RR
DynBrk Transistr
OL1
Motor Overload
7
OL2
Inv Overload
OL3
Car Stuck
OL4
Car Stuck
UL3
Undertorq Det 1
4
7-
Table 7.1 Resetable Faults
Meaning
Heatsink Overheat
The temperature of the Inverter's cool-
ing fin exceeded the setting in L8-02
and L8-03 is set to 0,1 or 2.
Inverter's Cooling Fan Stopped
Heatsink Overheat
The temperature of the Inverter's heat-
sink exceeded 105 °C.
Inverter's Cooling Fan Stopped
Dynamic Braking Transistor
The built-in dynamic braking transistor
failed.
Motor Overload
Detected when L1-01 is set to 1,2 or 3
and the Inverter's output current
exceeded the motor overload curve.
The overload curve is adjustable using
parameter E2-01 (Motor Rated Cur-
rent), L1-01 (Motor Protection Selec-
tion) and L2-02 (Motor Protection
Time Constant)
Inverter Overload
The Inverter output current exceeded
the Inverter's overload capability.
Overtorque/Car Stuck Detection 1
The Inverter's output current (V/f con-
trol) or the output torque (Vector Con-
trol) exceeded L6-02 for longer than
the time set in L6-03 and L6-01 is set to
3 or 4.
Overtorque/Car Stuck Detection 2
The Inverter's output current (V/f con-
trol) or the output torque (Vector Con-
trol) exceeded L6-05 for longer than
the time set in L6-06 and L6-04 is set to
3 or 4.
Undertorque Detection 1
The Inverter's output current (V/f con-
trol) or the output torque (Vector con-
trol) fell below L6-02 for longer than
the time set in L6-03 and L6-01 is set to
7 or 8.
Probable Causes
The temperature is too high.
There is a heat source nearby.
The Inverter's cooling fan(s) is/are bro-
ken.
The Inverter's internal cooling fan is
broken (18.5 kW and larger).
The ambient temperature is too high.
There is a heat source nearby.
The Inverter's cooling fan(s) is/are bro-
ken.
The Inverter's internal cooling fan is
broken (18.5 kW and larger).
Defective or failed dynamic braking
resistor caused braking transistor dam-
age.
The load is too large. The acceleration
time, deceleration time or cycle time
are too short.
The voltage settings of the V/f pattern
is incorrect.
The setting of Motor Rated Current
(E2-01) is incorrect.
The load is too large. The acceleration
time or deceleration times are too short.
The voltage settings of the V/f pattern
is incorrect.
The size of the Inverter is too small.
Motor was overloaded.
Motor was overloaded.
Motor was underloaded.
Corrective Actions
Check for dirt build-up on the fans
or heatsink.
Reduce the ambient temperature
around the drive.
Replace the cooling fan(s).
Check for dirt build-up on the fans
or heatsink.
Reduce the ambient temperature
around the drive.
Replace the cooling fan(s).
Cycle power to the Inverter.
Replace the Inverter.
Recheck the cycle time and the size
of the load as well as the accel/
decel times
(C1- ).
Check the V/f characteristics (E1-
).
Check the setting of Motor Rated
Current Setting (E2-01).
Recheck the cycle time and the size
of the load as well as the accel/
decel times
(C1- ).
Check the V/f characteristics (E1-
).
Check the setting of Motor Rated
Current Setting (E2-01).
Ensure the values in L6-02 and L6-
03 are appropriate.
Check application/machine status
to eliminate fault.
Ensure the values in L6-05 and L6-
06 are appropriate.
Check application/machine status
to eliminate fault.
Ensure the values in L6-02 and L6-
03 are appropriate.
Check application/machine status
to eliminate fault.