YASKAWA CIMR-G5A Series User Manual

Troubleshooting
9.1.2 Minor Fault Detection
9-6
9.1.2 Minor Fault Detection
Minorfaultsarea typeofInverterprotection functionthatdonot operatethefaultcontact output and areauto-
matically returned to their original status once the cause of the minor fault has been removed.
The Digital Operator display blinks and the minor fault is output from the multi-function outputs (H2-01 to
H2-03).
Take appropriate countermeasures according to the table below.
Table
9.2 Minor Fault Displays and Processing
Minor fault display Meaning Probable causes Corrective Actions
EF (blinking)
External Fault
Forward/Reverse Run Commands
Input Together
Both the forward and reverse run
commands have been ON for more
than 0.5 s.
−−−
Check the sequence of the forward
and reverse run commands.
:
Since the rotational direction is un-
known, the motor will be deceler-
ated to a stop when this minor
fault occurs.
UV (blinking)
DC Bus Undervolt
Main Circuit Undervoltage
The following conditions occurred
when there was no Run signal.
S
The main circuit DC voltage was
below the undervoltage detection
level (L2-05).
S
The surge current limiting contac-
tor opened.
S
The control power supply voltage
when below the CUV level.
See causes for UV1, UV2, and
UV3 faults.
See corrective actions for UV1,
UV2, and UV3 faults.
OV (blinking)
Overvoltage
Main Circuit Overvoltage
The main circuit DC voltage exceed-
ed the overvoltage detection level.
200 V class: Approx. 406 V
400 V class: Approx. 812 V
The power supply voltage is too high.
Decrease the voltage so it’s within
specifications.
Cooling Fin Overheating
The ambient temperature is too high. Install a cooling unit.
OH (blinking)
O
The temperature of the Inverter’s
cooling
fins
exceeded
the
setting
in
There is a heat source nearby. Remove the heat source.
Heatsink Over tmp
cooling
fins
exceeded
the
setting
in
L8-02.
The Inverter cooling fan has stopped.
Replace the cooling fan. (Contact
your Yaskawa representative.)
OH2 (blinking)
Over Heat 2
Inverter Overheating Pre-alarm
An OH2 alarm signal (Inverter over-
heating alarm signal) was input from
a multi-function input.
−−−
Clear the multi-function input’s over-
heating alarm input.
OL3 (blinking)
Overtorque Det 1
Overtorque 1
There has been a current greater than
the setting in L6-02 for longer than
the setting in L6-03.
−−−
S
Make sure that the settings in L6-02
and L6-03 are appropriate.
S
Check the mechanical system and
correct the cause of the overtorque.
OL4 (blinking)
Overtorque Det 2
Overtorque 2
There has been a current greater than
the setting in L6-05 for longer than
the setting in L6-06.
−−−
S
Make sure that the current setting in
L6-05 and time setting in L6-06 are
appropriate.
S
Check the mechanical system and
correct the cause of the overtorque.
Overspeed
The speed has been greater than the
Overshooting/undershooting are oc-
curring.
Adjust the gain again.
OS (blinking)
Over speed
The
speed
has
been
greater
than
the
setting in F1-08 for longer than the
setting in F1-09.
The reference speed is too high.
Check the reference circuit and refer-
ence gain.
Over
speed
The settings in F1-08 and F1-09
aren’t appropriate.
Check the settings in F1-08 and
F1-09.
PGO
(blinking)
The PG is disconnected.
There is a break in the PG wiring. Fix the broken/disconnected wiring.
PGO (blinking)
PG
open
The Inverter is outputting a frequen-
cy
,
but
PG
pulses
aren
’
t
being
input.
The PG is wired incorrectly. Fix the wiring.
PG
open
cy
,
but
PG
pulses
aren’
t
being
input
.
Power isn’t being supplied to the PG. Supply power to the PG properly.
9

YASKAWA CIMR-G5A Series Specifications

General

Brand	YASKAWA
Model	CIMR-G5A Series
Category	Inverter
Language	English