5-3
www.renishaw.com/nc4
Symptom Cause Action
NC4 status LED is
ashing amber/green.
Flashing at 1 Hz. System
is not set for optimum
performance.
The system operating voltage has increased
since it was last set up. This may occur if the
system was not set up and aligned correctly
(for more information, see page 3-11, “Head
alignment of the NC4 unit”).
Amber/green ickering.
NO FAULT.
If in tool set mode 2 or latch mode, amber/
green ickering indicates the tool is rotating
in the laser beam revealing the laser between
tool teeth. The unit is untriggered. This is not a
fault.
NC4 status LED is
red.
No air supply to the NC4. Check the air supply.
Damaged air pipes. Ensure that the air pipes are not damaged or
kinked.
Misalignment between the
receiver and transmitter
heads.
Realign the transmitter and receiver heads.
Laser beam is obstructed. Clear the obstruction.
Lens is dirty or the air hole is
blocked.
Refer to the servicing section of this guide for
cleaning instructions. (See the fault “Tx or Rx
lens is dirty or the air hole is blocked” for more
information).
NC4 system is not wired
correctly to the NCi-6
interface unit.
Ensure that all wires are correctly connected to
the NCi-6 interface unit (for more information,
see page 3-8, “NC4 system wiring details”).
Tx or Rx lens is dirty
or the air hole is
blocked.
Air supply to NC4 does not
conform to BS ISO 8573-1
Class 1.4.2.
Connect the air supply upstream of the oil mist
lubricator.
Ensure that the machine shop air supply is to
the required air quality.
If the temperature of the air supply is 5 °C
(41 °F) or more greater than ambient and is
humid, t an air dryer (supplied as standard
with NC4 packs).
Non-Renishaw air lter is
being used.
The air lter must conform to BS ISO 8573-1
Class 1.4.2.
Auto drain failed. Replace lter/dryer/regulator unit.
Air pipe is full of coolant or oil. Purge or replace the air pipe.
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