HTC 650 HDX Manual page 31

Error code
ObF
PHF
OPF
SLF
Cause
ObF = Driving load when shutting
down
Arises if the grinding disks are
running when the grinder is shut
down.
PHF = Mains phase outage
If this occurs the PHF flashes in the
display for a few seconds before it
goes out. May arise if someone pulls
the plug.
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.
SLF = Incorrect connection of remote
terminal.
Occurs when incorrectly connecting
the remote terminal. May also be an
internal error.
29
Action
Reset the frequency converter.
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.
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
 Amps - .kW -phase.
Contact service.