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24. TROUBLESHOOTING
Notes: '1.
'2.
'3.
'4.
If t h e inverter is reset, the accumulated internal thermal data of the electronic thermal
relay is initialized. I f
"0'
is set for Pr.9 (electronic thermal relay), the motor overload
shut-off prevention function
FHM)
is invalid.
This function
is
valid only when the "external thermal relay" is set.
The lunction is valid only when the optional brake resistor is connected. (Brake resis-
tor cannot be used for O.lk and 0.2k. These drives have
ria
brake transistor.)
The stall prevention lunctim activation current level can
be
set as required. Factory-
setting is 150%.
0
Retaining the error output signal
0
Error display
...............................
0
Resetting procedure
....................
If the power input to the inveder power
supply side, is opened, when the protection
function is activated,
the inverter control
power supply is lost and the error output sig-
nal cannot be retained. I f the error
output
signal must be retained, the drive wiring
must
be
designed to retain the error output
signal externally. See the block diagram for
inlormatin.
If the protection function
is activated, the
alarm (ALARM) indicating lamp is lit. In
response to the operation of the parameter
unit, the
display unit gives the indication
shown above.
If the protection function is activated, the in-
verter output shut-off state is retained. Con-
tinued operation
is impossible unless the
inverter is
reset. The inverter reset proce-
dure is indicated in page 48.
-
109-
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