337
Causes and corrective actions
5
(3) Alarm
When an alarm occurs, the output is not shut off. You can also output an alarm signal by making parameter
setting. (Set "98" in any of
Pr. 190 to Pr. 196 (output terminal function selection)
.
(Refer to page
Operation Panel
Indication
RB
FR-PU04
FR-PU07(-01)
RB
Name
Regenerative brake pre-alarm
Description
Appears if the regenerative brake duty reaches or exceeds 85% of the
Pr. 70 Special regenerative brake
duty
value. When the setting of
Pr. 70 Special regenerative brake duty
is the initial value (
Pr. 70
="0"), this
warning does not occur. If the regenerative brake duty reaches 100%, a regenerative overvoltage (E.
OV_) occurs.
The RBP signal can be simultaneously output with the [RB] display. For the terminal used for the RBP
signal output, assign the function by setting "7" (positive logic) or "107" (negative logic) in any of
Pr. 190
to Pr. 196 (output terminal function selection)
.
(Refer to page 130)
Appears only for the FR-F720-03160 (FR-F740-01800) or higher.
Check point
⋅
Check that the brake resistor duty is not high.
⋅
Check that the
Pr. 30 Regenerative function selection
and
Pr. 70 Special regenerative brake duty
values are
correct.
Corrective action
⋅
Increase the deceleration time.
⋅
Check the
Pr. 30 Regenerative function selection
and
Pr. 70 Special regenerative brake duty
values.
Operation Panel
Indication
TH
FR-PU04
FR-PU07(-01)
TH
Name
Electronic thermal relay function pre-alarm
Description
Appears if the cumulative value of the
Pr. 9 Electronic thermal O/L relay
reaches or exceeds 85% of the
preset level. If it reaches 100% of the
Pr. 9 Electronic thermal O/L relay
setting, a motor overload trip (E.
THM) occurs.
The THP signal can be simultaneously output with the [TH] display. For the terminal used for the THP
signal output, assign the function by setting "8" (positive logic) or "108" (negative logic) in any of
Pr. 190
to Pr. 196 (output terminal function selection)
.
(Refer to page 130)
Check point
⋅
Check for large load or sudden acceleration.
⋅
Is the
Pr. 9 Electronic thermal O/L relay
setting is appropriate?
(Refer to page 107.)
Corrective action
⋅
Reduce the load weight or the number of operation times.
⋅
Set an appropriate value in
Pr. 9 Electronic thermal O/L relay
.
(Refer to page 107.)
Operation Panel
Indication
MT
FR-PU04
————
FR-PU07(-01) MT
Name
Maintenance signal output
Description
Indicates that the cumulative energization time of the inverter has reached a given time.
When the setting of
Pr. 504 Maintenance timer alarm output set time
is the initial value (
Pr. 504
= "9999"),
this protective function does not function.
Check point
The
Pr. 503 Maintenance timer
setting is larger than the
Pr. 504 Maintenance timer alarm output set time
setting.
(Refer to page 305.)
Corrective action
Setting "0" in
Pr. 503 Maintenance timer
erases the signal.
Operation Panel
Indication
CP
FR-PU04
————
FR-PU07(-01) CP
Name
Parameter copy
Description
Appears when parameters are copied between models with capacities of FR-F720-02330 (FR-F740-
01160) or lower and FR-F720-03160 (FR-F740-01800) or higher.
Check point
Resetting of
Pr. 9, Pr. 30, Pr. 51, Pr. 52, Pr. 54, Pr. 56, Pr. 57, Pr. 70, Pr. 72, Pr. 80, Pr. 90, Pr. 158, Pr. 190 to
Pr. 196, Pr. 557
and
Pr. 893
is necessary.
Corrective action
Set the initial value in
Pr. 989 Parameter copy alarm release
.
Operation Panel
Indication
FN
FR-PU04
FR-PU07(-01)
FN
Name
Fan alarm
Description
For the inverter that contains a cooling fan,
appears on the operation panel when the cooling fan
stops due to a fault or different operation from the setting of
Pr. 244 Cooling fan operation selection
.
Check point
Check the cooling fan for an alarm.
Corrective action
Check for fan failure. Please contact your sales representative.
Summary of Contents for -NAFR-F720-00167-NA
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