
Causes and corrective actions
644
Abbreviation
E.SAF
FR-LU08
Safety circuit fault
FR-PU07
E.SAF
Name
Safety circuit fault
Description
• Appears when internal circuits are malfunctioning.
• Appears when one of the lines between S1 and PC, or between S2 and PC is opened.
Check point
• Check if the shorting wire across the terminals S1 and PC or the terminals S2 and PC is disconnected.
Corrective action
• Short across the terminals S1 and PC and the terminals S2 and PC with shortening wires.
Abbreviation
E.PBT
FR-LU08
PBT fault
FR-PU07
Fault
E.13
FR-LU08
FR-PU07
Fault 13
Name
Internal circuit fault
Description
The inverter trips when an internal circuit fault occurs.
Corrective action
Please contact your sales representative.
Abbreviation
E.OS
FR-LU08
Overspeed occurrence
FR-PU07
E.OS
Name
Overspeed occurrence
Description
The inverter trips when the motor speed exceeds the
Pr.374 Overspeed detection level
under encoder
feedback control, Real sensorless vector control, vector control, and PM sensorless vector control. This
protective function is not available in the initial status.
Check point
• Check that the
Pr.374
setting is correct.
• Check that the number of encoder pulses does not differ from the actual number of
Pr.369 (Pr.851) Number
of encoder pulses
(under encoder feedback control or vector control).
• Check that the motor temperature is not increased under Real sensorless vector control. (The motor
constant may vary due to increase in the motor temperature.)
Corrective action
• Set the
Pr.374
correctly.
• Set the
Pr.369 (Pr.851)
correctly (under encoder feedback control or vector control).
• Enable the online auto tuning at startup (set
Pr.95
(
Pr.574
) = "1") (under Real sensorless vector control).
(Refer to
To perform the online auto tuning at startup for a lift, use of the Start-time tuning start external input (X28)
signal is recommended.
Abbreviation
E.OSD
FR-LU08
Spd deviation fault
FR-PU07
E.OSd
Name
Speed deviation excess detection
Description
• The inverter trips if the motor speed is increased or decreased under the influence of the load etc. during
vector control with
Pr.285 Speed deviation excess detection frequency
set and cannot be controlled in
accordance with the speed command value.
• If the motor is accelerated against the stop command accidentally, the deceleration check function (
Pr.690
)
is activated to stop the inverter output.
Check point
• Check that the values of
Pr.285 and Pr.853 Speed deviation time
are correct.
• Check for sudden load change.
• Check that the number of encoder pulses does not differ from the actual number of
Pr.369 (Pr.851) Number
of encoder pulses
.
Corrective action
• Set
Pr.285 and Pr.853
correctly.
• Keep the load stable.
• Set
Pr.369 (Pr.851)
correctly.
Vector
Vector
Vector
Содержание 800 Series
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