Hilti 3493740 Use and Care Manual download pdf (Page 17)

Fault Possible cause Remedy

No hammering action. The power tool is too cold. Allow the power tool to warm

up to the minimum operating

temperature.

See section: 7.2.2 Hammer

drilling 6

The function selector switch is set

to “Drilling without hammering”.

Set the function selector switch to

“Hammer drilling”.

The power tool doesn’t start

and the LED blinks red.

A fault has occurred in the power

tool.

If necessary, the power tool should

be repaired by Hilti Service.

The power tool doesn’t start

and the LED lights red.

The carbon brushes are worn. Have it checked by a trained

electrical specialist and replaced if

necessary.

The power tool doesn’t start

and the indicator lamp blinks

yellow.

The power tool has not been

unlocked (power tools with optional

theft protection system).

Use the TPS key to unlock the power

tool.

The power tool doesn’t achieve

full power.

The extension cord is too long or its

gauge is inadequate.

Use an extension cord of an

approved length and / or of

adequate gauge.

The control switch is not pressed

fully.

Press the control switch as far as it

will go.

The “Reduced power” (50% power)

button is engaged.

Press the “Reduced power” button.

The voltage provided by the electric

supply is too low.

Connect the power tool to a different

power source.

The drill bit doesn’t rotate.

The function selector switch is not

engaged or is in the “Chiseling” or

“Chisel adjustment” position.

When the motor has stopped, move

the function control switch to the

“Drilling without hammering” or

“Hammer drilling” position.

The drill bit / chisel can’t be

released from the chuck.

The chuck is not pulled back fully. Pull the chuck back as far as it will

go and remove the insert tool.

The side handle is not fitted

correctly.

Release the side handle and refit

it correctly so that the clamping

band and side handle engage in the

groove.

10. Disposal

Most of the materials from which Hilti power tools or appliances are manufactured can be recycled. The

materials must be correctly separated before they can be recycled. In many countries, Hilti has already made

arrangements for taking back your old power tools or appliances for recycling. Please ask your Hilti customer

service department or Hilti representative for further information.

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Hilti 3493740 Use and Care Manual Page 17

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