8 Troubleshooting
8.1 General
Problem Cause Solution
Error code is shown on the
display.
1 of the alarm systems of the product is
started.
For more information refer to
Display over-
view on page 24
.
The product has no connec-
tion with other units.
The CAN bus signal is broken. Do a check of the cable connections on
the connection panel.
8.2 The product does not start
Problem Cause Solution
The product does not start Fault on the electrical supply, for example
fuses, RCDs or the connected cables.
Do a check that the voltage is correct on
the incoming phase/phases.
Fault on the power supply. The power sup-
ply indication is not on.
Do a check of the small switch F1.
Fault on the power supply. Low output
voltage.
Must be 27.2—27.5V. Refer to the display.
Fault on the main circuit board. The main
circuit board is not on.
Do a check of the fuse.
Fault on the battery. Low battery voltage. Must be 23-26V.
Fault on the fuses. Standby LED on the
control panel is not on.
Do a check of the fuse F2 and F8.
8.3 The fuses break or the RCD opens
frequently
Problem Cause Solution
RCD opens. The RCD, EMC filter, cable harness or
converter is defective.
Do a check of the RCD, EMC filter, cable
harness and converter.
Fuses break. Too high load or too small fuses. Do a check of the fuses and the current in-
ertia.
Decrease the load of the product by lower
the grinding pressure, lower the speed or
make a change of tool. Refer to the power
meter of the product.
Do a check of the capacity of the fuses.
8.4 The product does not operate correctly
Problem Cause Solution
The product does not oper-
ate correctly.
Too high load. Decrease the grinding pressure.
If the product operates at high speed, low-
er the speed and the product becomes
stronger. Refer to r/m for available power.
Do a check of the voltage meter during op-
eration.
Do a check of the tools. Use the correct
tools and make sure that they are correctly
installed.
The surface is tacky. Operate half of the grinding head on the
surface to be cleaned and half on the
clean surface. This removes remaining
waste on the tools.
950 - 001 - Troubleshooting - 51
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