HTC 950 RX Manual page 47

HTC 950 RX
Error Cause
code
tnF tnF = Autotuning fault
May arise if the motor has been replaced
by the wrong motor, which is outside the
norm values for the converter. May also
arise if the motor is broken.
OLF OLF = Overload motor
Occurs when the motor is overloaded for
a prolonged period. The motor protection
in the converter trips in order to protect
the motor.
OSF OSF = Over-voltage
Mains voltage too high or disturbance in
the mains supply. May occur if large
motors/machines are switched on or off
in the vicinity. May be due to non-CE
marked equipment.
USF USF = Under-voltage
Voltage too low due to large number of
consumers using the network. Temporary
drop in voltage. Long and/or weak cables
may also cause this fault.
ObF ObF = Operating load when stopped
Arises if the grinding discs are running
when the machine is to be switched off.
PHF PHF = Mains supply phase break
PHF flashes in the display for a few
seconds before it goes out. Occurs if
someone has pulled out the cord.
OPF OPF = Motor phase break
Occurs when the motor plug has not been
plugged in correctly or is loose. The fault
may also be due to the plugs or the
terminal boxes in the motor being loose.
May also occur if the machine goes into
overspeed during, for instance, test
operation with the grinding disc in the
air.
SLF SLF = Faulty connection of remote
terminal.
Occurs if connection to a remote terminal
is faulty. May also be due to an internal
fault.
1.0
Action
Check the motor. Replace the motor with an original
motor.
Switch off the machine. The motor protection must
cool.
Wait 8 minutes before the machine is restarted.
Measure the supply voltage. Change the socket. The
max. permitted supply voltage is 240V + 10%.
Replace the socket or remove some of the consumers
from the network (welding, etc. causes such faults).
Check the power supply to the machine, i.e. the
fuses and cable. If the machine still does not
function after the power supply has been checked,
the fault may be due to a fault on the contactor in the
machine or in the control panel. In this case, contact
HTC Service Centre.
Check the power supply to the machine, i.e. the
fuses and cable. If the machine still does not
function after the power supply has been checked,
the fault may be due to a fault on the contactor in the
machine or in the control panel. In this case, contact
HTC Service Centre.
Inspect the cable to the motor or the terminal boxes
in the motor. Reduce the speed if you are
test-operating the machine in the air. The fault
occurs if the motor current is around 8% of the
converter's nominal current, which is 11 Amp on 2.2
kW single phase.
Restart the computer. If the fault remains, contact
HTC Service Centre.
Electronic error codes
39