Omron SYSDRIVE 3G3FV User Manual page 351

Maintenance Operations
Minor fault display
OH (flashing)
Heatsink Over tmp
OH2 (flashing)
Over Heat 2
OL3 (flashing)
Overtorque Det 1
OL4 (flashing)
Overtorque Det 2
OS (flashing)
Over speed
PGO (flashing)
PG open
Meaning
The temperature of the
Inverter's cooling fins
exceeded the setting in L8-02.
An OH2 alarm signal (Inverter
overheating alarm signal) was
input from a multi-function
input.
There has been a current
greater than the setting in
L6-02 for longer than the
setting in L6-03.
There has been a current
greater than the setting in
L6-05 for longer than the
setting in L6-06.
The speed has been greater
than the setting in F1-08 for
longer than the setting in
F1-09.
The PG is disconnected.
The Inverter is outputting a
frequency, but PG pulses aren't
being input.
Probable causes and remedies
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.
Clear the multi-function input's overheating alarm
input.
Make sure that the settings in L6-02 and L6-03
are appropriate.
Check the mechanical system and correct the
cause of the overtorque.
Make sure that the current setting in L6-05 and
time setting in L6-06 are appropriate.
Check the mechanical system and correct the
cause of the overtorque.
Overshooting/undershooting are occurring.
Adjust the gain again.
The reference speed is too high.
Check the reference circuit and reference gain.
The settings in F1-08 and F1-09 aren't appropriate.
Check the settings in F1-08 and F1-09.
There is a break in the PG wiring.
Fix the broken/disconnected wiring.
The PG is wired incorrectly.
Fix the wiring.
Power isn't being supplied to the PG.
Supply power to the PG properly.
The torque limit is set to 0 through CompoBus/D
communications. (Applies only to flux vector con-
trol.)
Set F9-05 to 0 (torque limit disabled).
Chapter 8
8-9