Toshiba TOSVERT VF-A5 Instruction Manual page 113

Table 11-1 Fault displays, details, and remedies
Display
Details Presumed causes Remedies
*UP I Undervoltagetrip
•Input voltage (main circuit) is insufficient
Check the input voltage.
(main circuit) while running.
•Momentary power failure exceeding the
Set the regeneration power ride-through
undervoltage detection time
~
control
~
, auto-restart
occurred.
~
, and undervoltage detection
time~.
*Ot
Overtorque trip ·Load torque reached overtorque
Decrease load fluctuations.
detection level while running.
•Ground fault in output cable or motor. Check the grounding wires, etc.
EF
I
Ground fault trip
EF2
Etri
Auto-tuning error •Is a motor that is 2 or more ranks smaller than the inverter capacity being used?
•Are extremely small inverter output cables being used?
• Is the motor rotating?
•Is a device other than a 3-phase induction motor connected?
Et'=IP Inverter typeform • Has the control PCB been replaced? If replaced, ···Check the inverter typeform
error
(Or the main circuit/drive PCB)
with
G.-.ut
~
, and compare
with the type form table on page 132. if the
typeform is the same, set
G.-.UI::
~
to 'l to clear the
error.
If not replaced, ···Repair is required.
The trip validity can be selected via parameters for items marked with
* .
Table 11-1 Fault displays, details, and remedies
Informational messages (messages that do not indicate trips).
Display Details Presumed causes Remedies
OFF
ST terminal not ·The ST-CC connection is open. Close ST-CC.
activated
POFF
Control circuit ·The voltage between the control power
Measure the control power voltage.
undervoltage terminals RO and SO is insufficient. Unit repair is required if correct.
no,c,c
Main circuit ·The voltage between the main circuit Measure the main circuit power voltage.
u ndervoltage power terminals R, S and T is insufficient. Unit repair is required if correct.
.-t.-'=/
Displayed during •Retry is being executed. If the inverter starts again after a few
retry seconds, there is no problem.
E ,- ,-
I Frequency point ·The settings of frequency reference
Set
!E'.J]
and
~
further apart.
setting fault alarm points!E'.J]
and~
are too close.
[Lr
"Clear acceptance •This display will appear
if~
is Press ~ again, and the unit will be
possible" display pressed after a trip display. reset.
EOFF
"Emergency stop
•Stop has been executed from the panel
The motor will emergency stop if
~
acceptance during automatic or remote operation.
is pressed again. To cancel, press
possible" display another key.
Ct.-L "Operating panel •The inverter is in the coast-stop input Stop with the ISTOPI key or press
coast-stop
standby state.
another key to cancel.
acceptance
possible" display
HI
Setting value limit •A setting value limit has been reached. Check that the desired setting value is
, ,..,
warnings correct.
...
..,
Error display and
data are alternately
displayed twice
db
DC injection ·DC injection braking is being executed. If the display goes out after a few
dbo.-.. braking display seconds, there is no problem. Note)
·Motor shaft stationary control is being If the display goes out w1tn the stop
executed. command, there is no problem.
E ,- ,-
Password No. error •The password No.entered is incorrect. Input the correct password No.
E
J
Too many digits ·The No. of digits attempted to be Decrease the
~
(frequency
attempted to be displayed on the panel, such as for
multiplication factor) setting.
displayed frequency, exceeds four digits.
Reference
page
-
84,85
5
10,11
95,96
90,132
Reference
page
15
15
15
83
76
49
48,49
48
-
79,80,81
79,80,81
89
93
Note) If the DC injection braking ON/OFF function is selected with an input terminal selection. open that
terminal and CC. If the "db" display goes out, there is no problem.
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