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PROTECTIVE FUNCTIONS
167
Operation Panel
Indication
E.OLT
FR-PU04
Stll 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 <L
1
, L
2
, L
3
>.
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 <L
1
, L
2
, L
3
> terminals.
Corrective action
•
Reduce the 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 <L
1
, L
2
, L
3
> terminals may have damaged the inverter.
Contact your sales representative.
Note 4: The FR-A5NR (relay output/computer link) allows you to fit one more communication option. In this
case, only the relay output function may be used and the computer link function is unusable.
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 a 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 indicate 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
Change the inverter.