Mitsubishi Electric FR-F500 Series Instruction Manual page 184

Operation Panel
Indication
Name
Description
Check point
Corrective action
Operation Panel
Indication
Name
Description
Check point
Corrective action
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
Name
Description
Check point
Corrective action
Operation Panel
Indication
Name
Description
Check point
Corrective action
E.OLT
Stall prevention
The running frequency has fallen to 0 by stall prevention activated. (OL while
stall prevention is being activated.)
Check the motor for use under overload.
Reduce the load weight.
E.OPT
Option alarm
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
• 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
• 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
Contact your sales representative.
to
E.OP1
to OP3
Option slot alarm
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 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.
• Confirm the option function setting, etc.
• Connect the plug-in option securely.
E.PE
Parameter storage device alarm
Stops the inverter output if a fault occurs in the E
parameter settings.
Check for too many number of parameter write times.
Change the inverter.
PROTECTIVE FUNCTIONS
Stll Prev STP (OL shown during stall
FR-PU04
FR-PU04
, L , L > terminals.
1 2 3
, L , L > terminals may have damaged the inverter.
1 2 3
FR-PU04
FR-PU04
170
prevention operation)
Option Fault
, L , L >.
1 2 3
Option slot alarm 1 to 3
Corrupt Memry
2
PROM device which stores