Protective Functions; Causes And Corrective Actions - Mitsubishi FR-BU2-1.5K Instruction Manual

PROTECTIVE FUNCTIONS

5
PROTECTIVE FUNCTIONS

5.1 Causes and Corrective Actions

Error Message
•
A message regarding operational troubles is displayed. Output is not shutoff.
Operation panel
indication
Name
Description
Check point
Operation panel
indication
Name
Description
Check point
Corrective action
Major faults
•
When the protective function is activated, the inverter output is shut-off and
an alarm output is provided.
Operation panel
indication
Name
Description
Check point
Corrective action
*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
Name
Description
Check point
Corrective action
40
Er1
Write disable error
You attempted to make parameter setting when Pr. 77 Parameter write
selection has been set to disable parameter write.
Check the setting of Pr. 77 Parameter write selection.
(Refer to page 37)
Er2
Outside range error
When a value outside the parameter setting range is written
Check the parameter setting value.
Input a setting value within the parameter setting range.
THE
Thermal error *1 , *2
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 that the regeneration is not performed frequently.
Reduce the regeneration load.
Choose the brake unit and brake resistor which have a larger capacity.
FIN
Fin overheat
If the heatsink overheats, the temperature sensor is actuated to stop the
brake operation.
1.Check for too high ambient temperature.
2.Check for heatsink clogging.
1.Set the ambient temperature to within the specifications.
2.Clean the heatsink.