Omron SYSDRIVE 3G3FV User Manual page 346

Maintenance Operations
Fault Display
LF
Output Pha Loss
OH
Heatsink Over tmp
RH
Dyn Brk Resistor
RR
Dyn Brk Transistr
OL1
Motor Overloaded
OL2
Inv Overloaded
8-4
Meaning
A phase loss occurred at the
Inverter's output.
This fault is detected when
L8-07 is set to "Enabled."
The temperature of the
Inverter's cooling fins
exceeded the setting in L8-02
or 105 C.
The braking resistor is
overheated and the protection
function set with L8-01 has
operated.
The braking transistor is not
operating properly.
The motor overload protection
function has operated based
on the internal electronic
thermal value.
The Inverter overload
protection function has
operated based on the internal
electronic thermal value.
Probable causes and remedies
There is a broken wire in the output cable.
There is a broken wire in the motor's winding.
The output terminals are loose.
Reset the fault after correcting its cause.
The motor being used has a capacity less than 10%
of the Inverter's maximum motor capacity.
Check the motor and Inverter capacity.
The ambient temperature is too high.
Install a cooling unit.
There is a heat source nearby.
Remove the heat source.
The Inverter's cooling fan has stopped.
Replace the cooling fan.
(Contact your OMRON representative.)
High carrier frequency. (400V-class models)
Decrease the C6-01 setting.
The deceleration time is too short and the regen-
erative energy from the motor is too large.
Lighten the load, increase the deceleration
time, or reduce the motor speed.
Change to a Braking Resistor Unit.
Try turning the power supply off and on.
Replace the Inverter if the fault continues to oc-
cur.
The load is too large. The acceleration time, decel-
eration time, and cycle time are too short.
Check the size of the load and the length of the
acceleration, deceleration, and cycle times.
The V/f characteristics voltage is too high.
Check the V/f characteristics.
The motor's rated current setting (E2-01) is incor-
rect.
Check the motor's rated current setting
(E2-01).
The load is too large. The acceleration time, decel-
eration time and cycle time are too short.
Check the size of the load and the length of the
acceleration, deceleration, and cycle times.
The V/f characteristics voltage is too high.
Check the V/f characteristics.
The Inverter's capacity is too low.
Replace the Inverter with one that has a larger
capacity.
High carrier frequency.
Decrease the C6-01 setting.
Chapter 8