Mitsubishi FR-A740-00023-EC, Инструкция по эксплуатации

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397
Causes and corrective actions
5
P
R
OTECTIVE
FUNC
TI
ONS
(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
230
.) )
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. 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 230)
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 shut-off
(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 230)
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 175.)
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 175.)
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.
Check point
The Pr. 503 Maintenance timer setting is larger than the Pr. 504 Maintenance timer alarm output set time
setting. (Refer to page 377.)
Corrective action
Setting "0" in Pr. 503 Maintenance timer erraces 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 01800 or less and 02160 or
more.
Check point
Resetting of Pr. 9, Pr. 30, Pr. 51, Pr. 52, Pr. 54, Pr. 56, Pr. 57, Pr. 61, Pr. 70, Pr. 72, Pr. 80, Pr. 82, Pr. 90 to Pr.
94, Pr. 158, Pr. 455, Pr. 458 to Pr. 462, Pr. 557, Pr. 859, Pr. 860 and Pr. 893 is necessary.
Corrective action Set the initial value in
Pr. 989 Parameter copy alarm release
.
Operation Panel
Indication
SL
FR-PU04 ————
FR-PU07 SL
Name Speed limit indication (output during speed limit)
Description Output if the speed limit level is exceeded during torque control.
Check point
• Check that the torque command is not larger than required.
• Check that the speed limit level is not low.
Corrective action
• Decrease the torque command.
• Increase the speed limit level.
Operation Panel
Indication
FN
FR-PU04
FR-PU07
FN
Name Fan fault
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 a fault.
Corrective action
Check for fan fault. Please contact your sales representative.