Mitsubishi Electric FR-E 500 Instruction Manual page 186

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)
During If the regenerative energy of the motor
deceleration increases too much to exceed the brake
capability, this function stops the decrease
in frequency to prevent overvoltage shut-
off. As soon as the regenerative energy
has reduced, deceleration resumes.
Check for sudden speed reduction.
The deceleration time may change.
Increase the deceleration time using Pr. 8 "deceleration
time".
PS
PU stop
A stop made by pressing the
set in Pr. 75 "PU stop selection".
Check for a stop made by pressing the
operation panel during external operation.
Refer to page 102.
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 set any parameter value while parameter
write is being inhibited in Pr. 77 "parameter write inhibit
selection".
Perform operation correctly.
170
PROTECTIVE FUNCTIONS
FR-PU04 oL
FR-PU04
PS
STOP
key of the PU has been
RESET
STOP
RESET
key of the
5