Draper Expert 70052, Instructions Manual

– 14 –

8.7  THERMAL CUT-OUT – FIG.13

If welding for extended periods, the thermal cut-out will 

activate and the LED indicator 

(M) 

will illuminate, 

prohibiting use of the machine until sufficiently cool.
Caution! After completion of any welding task, leave the 

unit connected to the power supply for a sufficient period 

to allow the cooling fan to continue working.

13

FIG.

9.  MAINTENANCE AND 

TROUBLESHOOTING 

9.1 MAINTENANCE

 Warning!

If the welding machine has just been turned off, you 

must not conduct any internal checks or 

maintenance for at least 5 minutes after the power 

distribution box switch or power switch is 

disconnected so that the capacitor inside the 

welding machine is completely discharged. 

− It is crucial to carry out regular checks on this product 

to ensure optimum performance and safe operation.

− The inspection table below offers guidance for the 

checking of components for general wear and tear or 

damage. Wherever necessary, clean or replace such 

items.

 Warning! Any live electrical parts touched may 

cause fatal electric shock or serious burns.
For your own safety, turn the switch off and remove the 

plug from the power  supply socket when carrying out 

any form of maintenance or cleaning. If in doubt, consult 

Draper Tools, or an authorised service agent.

Welding power supply:

Component

Check points

Advisories

Front panel

− Check if any 

components 

are 

damaged or 

loose.

Tighten or 

replace where 

necessary

Front panel

− Check if the 

lower quick 

socket is 

loose.

The lower quick 

socket is a 

regular item. If a 

defect occurs, it 

will be 

necessary to 

check the 

inside, re-fasten 

or replace 

components 

where 

necessary.

Rear panel

− Check if the 

air intake of 

the cooling 

fan has 

foreign 

objects 

sticking to it.

Routine

− Power on, 

and then 

check if the 

appearance 

has fading or 

too hot 

traces.

− Check if the 

cooling fan 

has stable 

operation 

sound.

− Check if the 

cooling fan 

takes in air 

from the air 

intake, if 

odour, 

abnormal 

vibration or 

noise 

(especially 

during 

welding) 

occurs.

In-case of 

defects, it is 

necessary to 

check the inside 

of the device.

Top plate, 

bottom 

plate and 

side panel

− When the 

machine 

cover is 

installed 

onto the 

housing, 

check if it is 

loose.

− Check if 

bolts are 

loose.

In case of 

defects, it is 

necessary to 

replace or 

fasten 

components, 

etc., as 

required.

(M)