Mitsubishi FR-BU2-H30K - Protective Functions and Error Handling; Error Messages and Causes; Major Faults and Alarms

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PROTECTIVE FUNCTIONS
5 PROTECTIVE FUNCTIONS
5.1 Causes and Corrective Actions
• Error Message
A message regarding operational troubles is displayed. Output is not shutoff.
• Major faults
When the protective function is activated, the inverter output is shut-off and
an alarm output is provided.
Operation panel
indication
Er1
Name Write disable error
Description
You attempted to make parameter setting when Pr. 77 Parameter write
selection
 has been set to disable parameter write.
Check point
Check the setting of Pr. 77 Parameter write selection.
(Refer to page 37)
Operation panel
indication
Er2
Name Outside range error
Description When a value outside the parameter setting range is written
Check point Check the parameter setting value.
Corrective action Input a setting value within the parameter setting range.
Operation panel
indication
THE
Name Thermal error *1 , *2
Description
The electronic thermal relay function built in the brake unit detects brake
resistor overheat and the protection circuit is activated to stop the brake
operation when the temperature reaches the specified value.
Check point Check that the regeneration is not performed frequently.
Corrective action
Reduce the regeneration load.
Choose the brake unit and brake resistor which have a larger capacity.
*1 This functions only when Pr.0
 ="1"(BU mode (when a GRZG type brake resistor is
connected)).
*2 Resetting the brake unit initializes the internal thermal integrated data of the electronic thermal
relay function.
Operation panel
indication
FIN
Name
Fin overheat
Description
If the heatsink overheats, the temperature sensor is actuated to stop the
brake operation.
Check point
1.Check for too high ambient temperature.
2.
Check for heatsink clogging.
Corrective action
1.Set the ambient temperature to within the specifications.
2.Clean the heatsink.