Mitsubishi Electric FR-A500 Instruction Manual page 205

Operation Panel
Indication
Name
Description
Check point
Corrective action
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 one more communication option to be fitted. In
this case, only the relay output function may be used and the computer link is unusable.
Operation Panel
Indication
Name
Description
Check point
Corrective action
Operation Panel
Indication
Name
Description
Check point
Corrective action
E.BE
Brake transistor alarm detection
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.
• Reduce load J.
• Check that the frequency of using the brake is proper.
Replace the inverter.
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 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 <L
Contact your sales representative.
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 the 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 for a brake in the communication cable.
• 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.
Contact your sales representative.
PROTECTIVE FUNCTIONS
FR-PU04
FR-PU04
FR-PU04
, L , L > terminals.
1 2 3
, L , L > terminals may have damaged the inverter.
1 2 3
to
FR-PU04
FR-PU04
196
Br. Cct. Fault
Still Prev STP ( OL shown during stall
prevention operation)
Option Fault
, L , L > terminals.
1 2 3
Option slot alarm 1 to 3
Corrupt Memry
2
PROM device which stores