Hilti DD AF-CA Mode D'emploi page 13

Fault
The hand wheel cannot be ro-
tated.
The service LED blinks.
en
The service LED lights con-
stantly.
The water flow rate is too low.
Water drips from the casing of
the drilling feed unit.
The drilling feed unit motor runs
but the carriage doesn't move.
Cut Assist mode cannot be acti-
vated.
The drilling operation slows or
stops.
10
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Possible cause
The gearing section of the drilling
feed unit is defective.
The carriage gearing is defective.
Fault that can be remedied (e.g.
emergency stop button pressed in,
overheating, communication error).
Critical error or fault.
The core drilling machine water valve
is blocked or defective.
The drilling feed unit solenoid valve is
blocked or defective.
The water circuit is defective.
The solenoid valve is defective.
The drilling feed unit is fitted incor-
rectly.
The gearing section of the drilling
feed unit is defective.
The carriage gearing is defective.
The plug connector for the core
drilling machine is faulty.
The motor is defective.
The gearing is defective.
The electronics are defective.
The switch is defective.
The emergency stop button is
pressed in.
The core bit is defective (segments
polished or damaged).
Remedy
Contact Hilti Service.
Contact Hilti Service.
1.) Release the emergency stop but-
ton.
2.) If overheating occurs, allow the
machine to cool down.
3.) Check the connecting cable.
4.) Acknowledge and cancel the error
status by pressing the "Off" switch on
the core drilling machine.
Unplug the core drilling machine from
the power outlet, wait 5 seconds, and
then plug it in again.
Contact Hilti Service if the service in-
dicator LED continues to light.
Check that the water supply is in-
stalled correctly.
Check whether the valve is blocked or
defective.
Contact Hilti Service.
Check that the water supply is in-
stalled correctly.
Check whether the valve is blocked or
defective.
Contact Hilti Service.
First disconnect the core drilling ma-
chine from the electric supply.
Disconnect the system from the water
supply.
Contact Hilti Service.
First disconnect the core drilling ma-
chine from the electric supply.
Disconnect the system from the water
supply.
Contact Hilti Service.
Check the mechanical connection
between the drilling feed unit and the
carriage.
Contact Hilti Service.
Contact Hilti Service.
Check the plug connection.
Contact Hilti Service.
Contact Hilti Service.
Contact Hilti Service.
Contact Hilti Service.
Release the emergency stop button.
Sharpen or replace the core bit.