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Mitsubishi Electric FR-B-750 to 75K Instruction Manual Page 278

Fr-b-750 to 75k (200v class), fr-b-750 to 110k (400v class).
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Operation Panel
Indication
Name
Regenerative brake pre-alarm
Appears if the regenerative brake duty reaches or exceeds 85% of the Pr. 70 Special regenerative brake
duty value. 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
Description
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 125)
Appears only for the 75K or more.
• Check that the brake resistor duty is not high.
Check point
• Check that the Pr. 30 Regenerative function selection and Pr. 70 Special regenerative brake duty values are
• Increase the deceleration time.
Corrective action
• Check the Pr. 30 Regenerative function selection and Pr. 70 Special regenerative brake duty values.
Operation Panel
Indication
Name
Electronic thermal relay function pre-alarm
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 shut-off
(E. THM) occurs.
Description
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 125)
1. Check for large load or sudden acceleration.
Check point
2. Is the Pr. 9 Electronic thermal O/L relay setting is appropriate? (Refer to page 96.)
1. Reduce the load weight or the number of operation times.
Corrective action
2. Set an appropriate value in Pr. 9 Electronic thermal O/L relay. (Refer to page 96.)
Operation Panel
Indication
Name
Maintenance signal output
Description
Indicates that the cumulative energization time of the inverter has reached a given time.
The Pr. 503 Maintenance timer setting is larger than the Pr. 504 Maintenance timer alarm output set time
Check point
setting. (Refer to page 249.)
Corrective action
Setting "0" in Pr. 503 Maintenance timer erraces the signal.
Operation Panel
Indication
Name
Parameter copy
Description
Appears when parameters are copied between models with capacities of 55K or less and 75K or more.
Resetting of Pr.9, Pr.30, Pr.52, Pr.54, Pr.56, Pr.57, Pr.61, Pr.70, Pr.80, Pr.82, Pr.90 to Pr.94, Pr.158, Pr.557,
Check point
Pr.859 and Pr.893 is necessary.
Corrective action
Set the initial value in Pr. 989 Parameter copy alarm release.
(3) Minor fault
When the protective function is activated, the output is not shut off. You can also output a minor fault 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
Name
Fan fault
For the inverter that contains a cooling fan,
Description
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 a fault.
Corrective action
Check for fan fault. Please contact your sales representative.
RB
correct.
TH
MT
CP
FN
Causes and corrective actions
FR-PU04
RB
FR-PU07
FR-PU04
TH
FR-PU07
FR-PU04
————
FR-PU07
MT
FR-PU04
————
FR-PU07
CP
FR-PU04
FN
FR-PU07
appears on the operation panel when the cooling fan
.))
125
5
269

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