200
PROTECTIVE FUNCTIONS
Note: 4. The FR-A5NR (relay output/computer link) may be used with another communication option. In this
case, only the relay output function may be used and the computer link is unusable.
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 J.
• Check that the frequency of using the brake is proper.
Corrective action Replace 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 two or more communication options are fitted. (Note 4)
When the high power factor converter is connected, this alarm appears if an AC
power supply is accidentally connected to R, S, T terminals.
Check point
• Check that the number of communication options fitted is one.
• When the high power factor converter is connected, check for an AC power supply
connected to the R, S, T terminals.
Corrective action
• Reduce the number of communication options used to one.
• Check the parameter (Pr. 30) setting and wiring.
• When the high power factor converter is connected, connecting an AC power
supply to the R, S, T terminals may have damaged the inverter. Contact your sales
representative.
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,
contact fault of the plug-in option other than the communication option).
Check point
• Check for a wrong option function setting and operation.
• Check that the plug-in option is connected to the connector securely.
(1 to 3 indicates the option slot numbers.)
• Check the communication cable for wire breakage.
• Check that the termination resistor is fitted properly.
Corrective action
• Confirm the option function setting, etc.
• Connect the plug-in option securely.
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 Contact your sales representative.
