MITSUBISHI ELECTRIC FR-S520E - Manual (Page 174)

164
Errors (Alarms)
*2. Functions only when any of Pr. 60 to Pr. 63 (input terminal function selection)
is set to OH.
Operation Panel Indication GF FR-PU04
Earth (Ground)
Fault
Name Start-time output side earth (ground) fault overcurrent protection
Description
This function stops the inverter output if an earth (ground) fault
overcurrent flows due to an earth (ground) fault which occurred on
the inverter's output (load) side. Made valid when Pr. 40 "start-time
earth (ground) fault detection selection" = "1".
Check point
Check for an earth (ground) fault in the motor and connection
cable.
Corrective action Remedy the earth (ground) fault portion.
Operation Panel Indication OHT FR-PU04 OH Fault
Name External thermal relay (*2)
Description
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 point
• 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).
Corrective action Reduce the load and operating duty.
Operation Panel Indication OLT FR-PU04 Stll Prev STP
Name Stall prevention (overload)
Description
The running frequency has fallen to 0 by stall prevention operation
activated. OL appears while stall prevention is being activated.
Check point Check the motor for use under overload.
Corrective action Reduce the load weight.
Operation Panel Indication OPT FR-PU04 Option Fault
Name Communication error
Description
Stops the inverter output if a setting error or connection (connector)
fault occurs during use of RS-485 communication function.
Check point Check that the connector is plugged securely.
Corrective action
Make connection securely.
Please contact your sales representative.
Operation Panel Indication PE FR-PU04 Corrupt Memory
Name Parameter storage device alarm
Description
A fault occurred in parameters stored
(example: E
2 PROM fault).
Check point Check for too many number of parameter write times.
Corrective action Please contact your sales representative.