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Error code Cause Action
ObF ObF = Driving load when shutting
down
Arises if the grinding disks are
running when the grinder is shut
down.
Reset the frequency converter.
PHF PHF = Mains phase outage
If this occurs the PHF ashes in the
display for a few seconds before it
goes out. May arise if someone pulls
the plug.
Check the electricity to the grinder,
i.e. fuses and cable. If the grinder will
still not start following the inspection
of the feed, the error may lie in the
contactor in the grinder or in the
control panel. Contact service if this
is the case.
OPF OPF = Motor phase failure
Happens if the motor contact is not
properly connected or there is a gap.
The error can also be on the motor
side if the contacts or the terminal
block are loose. May also occur if
the speed of the grinder is too high.
May occur when test running with the
grinding head off the ground.
Check the cable to the motor or
terminal blocks in the motor. Reduce
speed if you test run the machine off
the ground. The error arises when
the motor current is around 8% of the
converter’s nominal current which is
11 Amps - 2.2kW 1-phase.
SLF SLF = Incorrect connection of remote
terminal.
Occurs when incorrectly connecting
the remote terminal. May also be an
internal error.
Contact service.
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