Omron VARISPEED L7 User Manual

7-4
7
OH
Heatsink Overtemp
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.
The temperature is too high.
Check for dirt build-up on the fans
or heatsink.
There is a heat source nearby.
Reduce the ambient temperature
around the drive.
The Inverter's cooling fan(s) is/are bro-
ken.
Replace the cooling fan(s).
Inverter's Cooling Fan Stopped
The Inverter's internal cooling fan is
broken (18.5 kW and larger).
OH1
Heatsink Max Temp
Heatsink Overheat
The temperature of the Inverter’s heat-
sink exceeded 105 °C.
The ambient temperature is too high.
Check for dirt build-up on the fans
or heatsink.
There is a heat source nearby.
Reduce the ambient temperature
around the drive.
The Inverter’s cooling fan(s) is/are bro-
ken.
Replace the cooling fan(s).
Inverter’s Cooling Fan Stopped
The Inverter’s internal cooling fan is
broken (18.5 kW and larger).
RR
DynBrk Transistr
Dynamic Braking Transistor
The built-in dynamic braking transistor
failed.
Defective or failed dynamic braking
resistor caused braking transistor dam-
age.
Cycle power to the Inverter.
Replace the Inverter.
OL1
Motor Overload
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)
The load is too large. The acceleration
time, deceleration time or cycle time
are too short.
Recheck the cycle time and the size
of the load as well as the accel/
decel times
(C1-).
The voltage settings of the V/f pattern
is incorrect.
Check the V/f characteristics (E1-
).
The setting of Motor Rated Current
(E2-01) is incorrect.
Check the setting of Motor Rated
Current Setting (E2-01).
OL2
Inv Overload
Inverter Overload
The Inverter output current exceeded
the Inverter’s overload capability.
The load is too large. The acceleration
time or deceleration times are too short.
Recheck the cycle time and the size
of the load as well as the accel/
decel times
(C1-).
The voltage settings of the V/f pattern
is incorrect.
Check the V/f characteristics (E1-
).
The size of the Inverter is too small.
Check the setting of Motor Rated
Current Setting (E2-01).
OL3
Car Stuck
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.
Motor was overloaded.
Ensure the values in L6-02 and L6-
03 are appropriate.
Check application/machine status
to eliminate fault.
OL4
Car Stuck
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.
Motor was overloaded.
Ensure the values in L6-05 and L6-
06 are appropriate.
Check application/machine status
to eliminate fault.
UL3
Undertorq Det 1
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.
Motor was underloaded.
Ensure the values in L6-02 and L6-
03 are appropriate.
Check application/machine status
to eliminate fault.
Table 7.1 Resetable Faults
Display Meaning Probable Causes Corrective Actions

Omron VARISPEED L7 Specifications

General

Brand	Omron
Model	VARISPEED L7
Category	Inverter
Language	English