273
Causes and corrective actions
5
PR
O
T
E
C
T
IV
E
F
U
N
C
T
IO
N
S
Operation Panel
Indication
RB
FR-PU04
FR-PU07
RB
Name
Regenerative brake prealarm
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 116)
Appears only for the 01800 or more.
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
TH
Name
Electronic thermal relay function prealarm
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 116)
Check point
1. Check for large load or sudden acceleration.
2. Is the
Pr. 9 Electronic thermal O/L relay
setting is appropriate?
(Refer to page 95.)
Corrective action
1. Reduce the load weight or the number of operation times.
2. Set an appropriate value in
Pr. 9 Electronic thermal O/L relay
.
(Refer to page 95.)
Operation Panel
Indication
MT
FR-PU04
————
FR-PU07
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 254.)
Corrective action
Setting "0" in
Pr. 503 Maintenance timer
erases the signal.
Operation Panel
Indication
CP
FR-PU04
————
FR-PU07
CP
Name
Parameter copy
Description
Appears when parameters are copied between models with capacities of 01160 or less and 01800 or
more.
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
.
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