Mitsubishi FR - S500 Instruction Manual page 149

Transistorized inverter
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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 in 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 designed 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 (*3)
Stops the inverter output if a setting error or connection
(connector) fault occurs during use of the RS-485 communication
function.
Check that the connector is plugged securely.
Make connection securely.
Please contact your sales representative.
PE
Parameter error
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.
140
FR-PU04
Ground Fault
FR-PU04
OH Fault
FR-PU04
Stll Prev STP
FR-PU04
Option Fault
FR-PU04
Corrupt Memory
3

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