Mitsubishi Electric FR-V500 Series Instruction Manual page 85

Errors (Alarms)
Control Panel
Indication
Name
Description
Check point
Corrective action
Control Panel
Indication
Name
Description
Check point
Corrective action
Control Panel
Indication
Name
Description
Check point
Corrective action
Control Panel
Indication
Name
Description
Check point
Corrective action
Control Panel
Indication
Name
Description
Check point
Corrective action
Control Panel
Indication
Description
Corrective action
PS
PU stop
Appears when a stop was made by pressing of the control panel
(FR-PU04V) during operation in the external operation mode with the Pr. 75 "reset selection/PU
stop selection" setting.
Check for a stop made by pressing
Refer to page 83.
RB
Regenerative brake prealarm
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 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.
• Increase the deceleration time.
• Check the Pr. 30 "regenerative function selection" and Pr. 70 "special regenerative brake duty"
values.
TH
Electronic thermal relay function prealarm
Appears if the cumulative value of the electronic thermal relay function reaches or exceeds 85% of
the preset level. If it reaches 100% of the preset level, a motor overload shutoff (E. THM) occurs.
Check for large load or sudden acceleration.
Reduce the load weight or the number of operation times.
MT
Maintenance signal output
Indicates that the cumulative operation time of the inverter has reached a given time.
Check that Pr. 890 "maintenance output set time" has been set. (A short time has been set.)
After checking the energization time, write "0" to Pr. 892 "maintenance output signal clear".
SL
Speed limit indication (speed limit)
Output if the speed limit level is exceeded during torque control.
• Check that the torque command is not larger than required.
• Check that the speed limit level is not low.
Decrease the torque command. Increase the speed limit level.
Err.
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);
• You attempted to make parameter setting when Pr. 77 "parameter write disable selection" has
been set to disable parameter write; or
• The main circuit power is turned on when the control circuit power (R1, S1) and the main circuit
power (R, S, T) are connected to a separate power. It is not a fault.
Perform run and operation securely.
FR-PU04V PS
STOP
of the control panel during external operation.
RESET
FR-PU04V RB
FR-PU04V TH
FR-PU04V MT
FR-PU04V SL
82
STOP
or parameter unit
RESET