HTC 800 RX Electronic error codes
2.0 37
7 Electronic error codes
7.1 General Information
A common fault on grinders is that the motor is overloaded. There are three levels of
overloading.
OCF = Rapidly rising current
OHF = Rapidly rising current
OLF = Overload motor
In the event of an error, the error code is shown in the display. The most common error
codes that may occur on the frequency converter in the control cabinet are listed below.
In the event of other errors, contact the HTC Service Centre.
7.2 Schneider Electric ATV312
Error code Cause Action
OCF Excess current The machine is running too fast or with too great a load. Lower
the speed, lower the load by changing the position of the
weights and check your tools. Check mechanical inertia, spin
the grinding discs.
OHF Overheating Open the control cabinet and ventilate. Check the filter and the
cooling fans in the cabinet. Let the frequency converter cool
down before restarting.
IFx/EEF Internal error Contact HTC Service Centre
SCF Short circuit or earth fault
involving the motor
Check the motor's cables and connections.
tnF Auto-tuning fault Check the motor's cables and connections.
OLF Overload See OCF. Let the frequency converter cool down before
restarting.
OSF Excess voltage Mains voltage too high or disturbance in the mains supply.
Check the supply voltage, change socket.
USF Under-voltage The connection cable is too long, poor connection or too many
consumers connected to the mains. Change socket, use shorter
cables and lower the speed.
PHF Mains supply phase break Incorrect power supply to the frequency converter. Check the
fuses in the mains supply and the connection cable.
OPF Motor phase break Check the motor's cables and connections.
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