Lincoln Electric IDEALARC DC-1000 Service Manual page 85

F-51
INPUT CONTACTOR (1CR) CLEANING AND/OR REPLACEMENT
FIGURE F.20 – LEAD #257 AT SECONDARY THER-
MOSTAT
WARNING
DO NOT APPLY INPUT POWER
TO THE DC-1000 WITH THE
CONTACTOR COVER PLATE
REMOVED. POWER APPLIED
WITHOUT COVER PLATE IN
POSITION MAY CAUSE SEVERE
ARCING RESULTING IN BODILY INJURY.
__________________________________________________
3. Blow out any dirt or dust from in and around
contacts.
4. Examine contacts for signs of wear.
5. If contacts are stuck together or overheated,
parts of the contactor, or the entire assembly,
should be replaced.
TROUBLESHOOTING AND REPAIR
(continued)
IDEALARC
FIGURE F.21 – LEAD #211 AND #212 QUICK DIS-
CONNECTS
CONTACTOR REPLACEMENT
Removal
1. Using a 11/16" wrench, remove leads L1, L2, L3
and output power leads from 1CR contactor.
Mark and label all leads for proper reconnec-
tion. See Figure F.19.
2. Remove lead #257 at secondary thermostat.
See Figure F.20 and refer to Wiring Diagram.
Remove any cable ties and/or harness looms
as necessary.
3. Remove the contactor interlock leads from
quick disconnects (leads 211 and 212) and from
resistor R3. See Figure F.21 and refer to Wiring
Diagram.
4. Remove input contactor using a 7/16" socket
wrench. Remove the four mounting bolts, nuts,
and associated washers (or loosen the two bot-
tom bolts and nuts, and remove the top two).
® DC-1000
F-51