HTC 650 - Page 60

60
Error code Cause Action
OLF OLF = Overload motor
Tripped motor protection. Arises follow-
ing long-term overload of the motor.
The motor protection in the converter
trips to protect the motor.
Reduce the speed of the grinder.
The grinder runs too robustly. It takes
around 8 minutes before the grinder
can be started again. The motor protec-
tion must cool down.
OSF OSF = Overvoltage
Mains voltage too high or interference
in the mains. May arise if large motors/
machines are started or shut down in
the vicinity. May arise from non CE-
marked equipment.
Measure the feed voltage. Change the
terminal. Max feed voltage is 240V +
10%.
USF USF = Undervoltage
Mains voltage too low. Results from
many users in the mains. Temporary
loss of voltage Long and/or weak
cables may cause this error.
Change terminal or remove users from
the mains. (Welds and such cause
these errors). Replace cable.
ObF ObF = Driving load when shutting down
Arises if the grinding disks are running
when the grinder is shut down.
Reset converter.
PHF 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.
Check the electricity to the grinder,
i.e. fuses and cable. If the grinder is
completely dead following the inspec-
tion of the feed, the error may lie in the
contactor in the grinder or in the con-
trol 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 termi-
nal blocks in the motor. Reduce speed
if you test run the machine off the
ground. The error arises when the mo-
tor current is around 8% of the convert-
er'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 inter-
nal error.
Contact service.
Electronic error codes - HTC 950 RX continued.