HTC 950 RX Manual page 40

Error code
ObF
PHF
OPF
SLF
Cause
ObF = Driving load when shutting down
Arises if the grinding discs are running
when the grinder is shut down.
PHF = Mains phase outage
If this occurs the PHF flashes in the dis-
play for a few seconds before it goes out.
May arise if someone pulls out the plug.
OPF = Motor phase failure
Comes about 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.
3
Action
Reset converter.
Check the feed to the grinder, i.e. fuses
and cable. If the grinder is completely
dead 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 cur-
rent which is 11 Amps - 2.2kW 1-phase.
Contact service department.