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Errors (Alarms)
ERRORS AND PROTECTIVE FUNCTIONS
6
Operation Panel
Indication
RB FR-PU04V 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.
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-PU04V TH
Name
Electronic thermal relay prealarm
Description
Appears if the integrating value of the electronic thermal relay reaches or exceeds 85% of the
preset level. If it reaches 100% of the preset level, a motor overload shutoff (E. THM) occurs.
Check point
Check for large load or sudden acceleration.
Corrective action
Reduce the load weight or the number of operation times.
Operation Panel
Indication
MT FR-PU04V MT
Name
Maintenance signal output
Description
Indicates that the cumulative energization time of the inverter has reached a given time.
Check point
Check that Pr. 890 "maintenance output setting time" has been set. (A short time has been set.)
Corrective action
After checking the energization time, write "0" to Pr. 892 "maintenance output signal clear".
Operation Panel
Indication
SL FR-PU04V SL
Name
Speed limit indication (speed restriction)
Description
Output if the speed restriction level is exceeded during torque control.
Check point
• Check that the torque command is not larger than required.
• Check that the speed restriction level is not low.
Corrective action
Decrease the torque restriction. Increase the speed restriction level.
Operation Panel
Indication
Err.
Description
This alarm appears if:
• The RES signal is on;
• You attempted to make parameter setting in the external operation mode;
• You attempted to change the operation mode during operation;
• You attempted to set any parameter value outside its setting range;
• The PU and inverter cannot make normal communication;
• You attempted to make parameter setting during operation (when signal STF or STR is on); or
• You attempted to make parameter setting when Pr. 77 "parameter write disable selection" has
been set to disable parameter write.
Corrective action
Perform run and operation securely.