Instruction manual

PROTECTIVE FUNCTIONS
176
Operation Panel
Indication
E.BE
FR-PU04 Br. Cct. Fault
Name
Brake transistor alarm detection
Description
If the brake circuit fault has occurred due to damaged brake transistors, etc.,
this function stops the inverter output.
In this case, the inverter power must be switched off immediately.
Check point
• Reduce load GD
2
• Check that the frequency of useing the brake is proper.
Corrective action Change the inverter.
Operation Panel
Indication
E.OLT
FR-PU04
Still Prev STP ( OL shown during stall
prevention operation)
Name
Stall prevention
Description
The running frequency has fallen to 0 by stall prevention activated. (OL while
stall prevention is being activated.)
Check point Check the motor for use under overload.
Corrective action Reduce the load weight.
Operation Panel
Indication
E.OPT
FR-PU04 Option Fault
Name
Option alarm
Description
Stops the inverter output if the dedicated option used in the inverter results in
setting error or connection (connector) fault.
When the high power factor converter connection is selected, this alarm
appears if an AC power supply is connected to R, S, T.
Check point 
Corrective action 
Operation Panel
Indication
E.OP1
to OP3
FR-PU04 Option slot alarm 1 to 3
Name
Option slot alarm
Description
Stops the inverter output if a functional alarm occurs in the plug-in option loaded
in the corresponding slot (e.g. communication alarm of the communication
option).
Check point
Check for a wrong option function setting and operation.
(1 to 3 indicate the option slot numbers.)
Corrective action Confirm the option function setting, etc.
Operation Panel
Indication
E.PE
FR-PU04 Corrupt Memry
Name
Parameter storage device alarm
Description
Stops the inverter output if a fault occurs in the E
2
PROM device which stores
parameter settings.
Check point Check for too many number of parameter write times.
Corrective action Change the inverter.