Omron SYSDRIVE 3G3FV User Manual

8-4
Fault Display Probable causes and remediesMeaning
LF
Output Pha Loss
A phase loss occurred at the
Inverter’s output.
This fault is detected when
L8-07 is set to “Enabled.”
• 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.
OH
Heatsink Over tmp
The temperature of the
Inverter’s cooling fins
exceeded the setting in L8-02
or 105C.
• 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.
RH
Dyn Brk Resistor
The braking resistor is
overheated and the protection
function set with L8-01 has
operated.
• 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.
RR
Dyn Brk Transistr
The braking transistor is not
operating properly.
→ Try turning the power supply off and on.
→ Replace the Inverter if the fault continues to oc -
cur.
OL1
Motor Overloaded
The motor overload protection
function has operated based
on the internal electronic
thermal value.
• 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).
OL2
Inv Overloaded
The Inverter overload
protection function has
operated based on the internal
electronic thermal value.
• 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.
Maintenance Operations Chapter 8

Omron SYSDRIVE 3G3FV Specifications

General

Brand	Omron
Model	SYSDRIVE 3G3FV
Category	Inverter
Language	English