Hilti FX 3-A Operating Instructions Manual page 27

Trouble or fault
The display shows 'F.02' and
the "Battery capacity" indi-
cator LEDs have all gone out.
The service indicator flashes.
The fault indicator on the
hand tool flashes.
The display shows 'F.05' and
the "Inert-gas can" indicator
LEDs have all gone out. The
service indicator flashes. The
fault indicator on the hand
tool flashes.
Product cannot be switched
on.
The battery is not charging.
No welding current
9.2 Indicates a fault
Faults or irregularities detected by the welding machine are shown on the display by an F. accompanied by
a 2-digit fault code (e.g. 'F.02'). In addition, and depending on fault type, fault indicators on the welding
machine and the hand tool light up.
Try to rectify the problem by applying the measures described below. It might be necessary for you to
acknowledge the fault by pressing the OK button on the hand tool before you can resume work.
If a fault code is displayed, check the quality of the weld. Correct the weld, if necessary.
If faults cannot be rectified by means of these measures or if a fault is recurrent, consult Hilti Service.
Malfunction
'F.01'
'F.02'
'F.03'
*2302420*
Possible cause
Battery discharged - the deep
discharge prevention system has
tripped.
Fill level of the inert-gas can too
low.
Battery deep-discharged on ac-
count of being stored for too long
without being recharged
Operating panel faulty
Communication error between
battery and charger.
Fan in the product faulty
Automatic thermal cut-out function
has tripped and shut down the
product.
Supply of cooling air insufficient
Air filter clogged
Power unit error
Possible cause
Internal error
Battery is discharged
The temperature is outside the
permissible range.
2302420
Action to be taken
▶ Charge the battery. → page 9
▶ Change the inert-gas can.
→ page 9
▶ Charge the battery. → page 9
▶ Contact Hilti Service.
▶ Contact Hilti Service.
▶ Contact Hilti Service.
▶ Wait for the cooling phase to
conclude. The product will
switch on again by itself after a
short time.
▶ Comply with the instructions
relating to the set-up conditions.
→ page 9
▶ Clean the air filter. → page 14
▶ Switch the product off and then
on again.
▶ If the fault recurs frequently,
contact Hilti Service.
Action to be taken
▶ Switch the welding machine off
for at least 30 seconds.
▶ Fully recharge the battery.
▶ Fully recharge the battery.
▶ Check the ambient temperature.
Operate the product only within
the permissible temperature
range. → page 8
English 17