Mitsubishi Electric FR-F740-00023 Instruction Manual page 282

Operation Panel
RB
Indication
Name
Regenerative brake prealarm
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.
Description
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 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
correct.
•• Increase the deceleration time.
Corrective action
•• Check the Pr. 30 Regenerative function selection and Pr. 70 Special regenerative brake duty values.
Operation Panel
TH
Indication
Name
Electronic thermal relay function prealarm
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.
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 116)
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 95.)
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 95.)
Operation Panel
MT
Indication
Name Maintenance signal output
Indicates that the cumulative energization time of the inverter has reached a given time.
Description
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.
The Pr. 503 Maintenance timer setting is larger than the Pr. 504 Maintenance timer alarm output set time
Check point
setting. (Refer to
Corrective action
Setting "0" in Pr. 503 Maintenance timer erases the signal.
Operation Panel
CP
Indication
Name Parameter copy
Appears when parameters are copied between models with capacities of 01160 or less and 01800 or
Description
more.
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,
Check point
Pr.557 and Pr.893 is necessary.
Corrective action
Set the initial value in Pr. 989 Parameter copy alarm release.
FR-PU04
FR-PU07
FR-PU04
FR-PU07
FR-PU04
FR-PU07
page 254.)
FR-PU04
FR-PU07
Causes and corrective actions
RB
TH
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MT
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CP
5
273