Mitsubishi FR-S500 Instruction Manual page 170

Errors (Alarms)
Operation Panel Indication
Name
Description
Check point
Corrective action
Operation Panel Indication
Name
Description
Check point
Corrective action
*2. Functions only when any of Pr. 60 to Pr. 63 (input terminal function selection)
is set to OH.
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
GF
Start-time output side ground fault overcurrent protection
This function stops the inverter output if a ground fault overcurrent
flows due to a ground fault which occurred on the inverter's output
(load) side. Made valid when Pr. 40 "start-time ground fault
detection selection" = "1".
Check for a ground fault in the motor and connection cable.
Remedy the ground fault portion.
OHT
External thermal relay (*2)
If the external thermal relay provided for motor overheat protection
or the internally mounted temperature relay in the motor switches
on (contacts open), the inverter output is stopped. If the relay
contacts are reset automatically, the inverter will not restart unless
it is reset.
• Check for motor overheating.
• Check that the value of 7 (OH signal) is set correctly in any of Pr.
60 to Pr. 63 (input terminal function selection).
Reduce the load and operating duty.
OLT
Stall prevention (overload)
The running frequency has fallen to 0 by stall prevention operation
activated. OL appears while stall prevention is being activated.
Check the motor for use under overload.
Reduce the load weight.
OPT
Communication error
Stops the inverter output if a setting error or connection (connector)
fault occurs during use of RS-485 communication function.
Check that the connector is plugged securely.
Make connection securely.
Please contact your sales representative.
PE
Parameter storage device alarm
A fault occurred in parameters stored
2
(example: E PROM fault).
Check for too many number of parameter write times.
Please contact your sales representative.
160
FR-PU04 Ground Fault
FR-PU04 OH Fault
FR-PU04 Stll Prev STP
FR-PU04 Option Fault
FR-PU04 Corrupt Memory