GE Fuji Electric MICRO-SAVER AF-300, Startup Manual

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H98 Protection/Maintenance (Selection)
Specify a combination between the output phase loss
protection, input phase loss protection, and automatic
carrier frequency lowering.
Automatic lowering of carrier frequency
When using a drive in a critical system or any other
system where drive operation should not be interrupted,
select this feature to protect the system from any failure
resulting from the drive tripping due to the heat sink
overheating (0H1) or overload (0LU), abnormally high
ambient temperature, or a cooling mechanism failure.
This feature lowers the drive frequency before the drive
enters the alarm mode. However, the level of motor
noise may increase.
Input phase loss protection (L )
The drive will enter the alarm mode and issue an alarm
(L ) if a phase loss is detected in the three-phase input
power source.
Do not enable this protection with drives with single-
phase input, as it is not applicable.
When operating a drive with three-phase input with a
single phase for testing purposes, this protection may
be disabled, but only if the load can be reduced.
Output phase loss protection (0PL)
The drive will enter the alarm mode activated by the
output phase loss protection, and issue the alarm 0PL if
it detects an output phase loss while it is running.
If a magnetic contactor that has been inserted in the
drive output circuits switches off when the drive is run-
ning, however, this protection will not be activated.
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