Mitsubishi Electric FR-F500 Series Instruction Manual page 188

Operation Panel
Indication
Name
Description
Check point
Corrective action
Operation Panel
Indication
Name
Description
Check point
Corrective action
Operation Panel
Indication
Name
Description
Check point
Corrective action
Operation Panel
Indication
Description
Corrective action
oL
Stall prevention (overvoltage)
If the regenerative energy of the motor increases too much
to exceed the brake capability, this function stops the
During
decrease in frequency to prevent overvoltage shut-off. As
deceleration
soon as the regenerative energy has reduced, deceleration
resumes.
Check for sudden speed reduction.
The deceleration time may change. Increase the deceleration time with Pr. 8
"deceleration time".
PS
PU stop
A stop made by pressing the
stop selection".
Check for a stop made by pressing the
Refer to page 102.
TH
Electronic overcurrent protection prealarm
This alarm appears if the cumulative value of the electronic overcurrent
protection reaches 85% of the preset level. If it reaches 100% of the preset
level, motor overload shutoff (E.THM) occurs.
Check for large load or sudden acceleration.
Reduce the load volume or the frequency of operation.
Err.
This alarm appears if:
• The RES signal is on.
• You attempted to set any parameter value 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.
• You attempted to set any parameter value during operation
(while signal STF or STR is ON).
• You attempted to make parameter setting when Pr. 77 "parameter write
disable selection" has been set to disable parameter write.
Perform operation correctly.
PROTECTIVE FUNCTIONS
FR-PU04
FR-PU04
STOP
key of the PU has been set in Pr. 75 "PU
RESET
STOP
RESET
FR-PU04
174
oL
PS
key of the operation panel.
TH