Maintenance, Safety precautions, Routine and periodic maintenance – Lincoln Electric IDEALARC R3R-500 User Manual

Page 26: Warning

SAFETY PRECAUTIONS

ELECTRIC SHOCK can kill.

• Only qualified personnel

should perform this mainte-
nance.

• Turn the input power OFF at

the disconnect switch or fuse
box before working on this
equipment.

• Do not touch electrically hot parts.

ROUTINE AND PERIODIC
MAINTENANCE

Perform the following daily:

1. Check that no combustible materials are around

the machine or in the welding or cutting area.

2. Remove any debris, dust, dirt, or materials that

could block cooling air flow to the machine.

3. Inspect the electrode cables for any slits or punc-

tures in the cable jacket. Also check for any other
condition that could affect the proper operation of
the machine.

Perform periodically:

1. In extremely dusty conditions, dirt may clog the

cooling air channels, causing the machine to run
hot. Blow out the machine at regular intervals with
low pressure air. Clean the following parts. See
Figure D.1.

• Main transformer and choke

• SCR/diode bridge

• Control PC board

• Electrode and work cable connections

• Fan assembly

NOTE: The fan motor has sealed bearings that require
no service.

• Remote control terminal strip TS1 (in machines

below code 9500).

NOTE: Keeping remote control terminal strip TS1
clean is especially important in damp locations.

2. Pocket Amptrol Maintenance - Clean and maintain

the optional Pocket Amptrol (if equipped). Keep
the probe tip in good condition. It requires sharp
edges to penetrate heavy oxide coatings on the
work piece. A blunted tip could result in different
welding currents for a given dial setting.

MAINTENANCE

D-2

IDEALARC R3R