Lincoln Electric IDEALARC R3R 500-I Operating Manual page 13

PROBLEMS
(SYMPTOMS)
A. Input contactor chatters.
B. Machine input contactor does not
operate.
IM 6000
TROUBLESHOOTING
POSSIBLE
CAUSE
FUNCTION PROBLEMS
1 Faulty input contactor.
2 Low line voltage.
1. Supply line fuse blown.
2. Power circuit dead.
3. Broken or loose power lead.
4. Wrong voltage.
5. .Thermostats tripped. (High Temperature
Warning Light should be lit.) (Welder
overheated.)
6. Input contactor coil open.
7. Open winding on 115V pilot transformer.
8. Power ON-OFF switch not closing.
9. Lead broken or loose connection in 115V
starter circuit.
10. Thermostats defective. (High
Temperature Warning Light should be
lit.)
Idealarc R3R 500-I & 600-I
RECOMMENDED
COURSE OF ACTION
1. Repair or replace.
2. Check with Power Company.
1. Replace (look for reason for blown fuse
first).
2. Check voltage.
3 Repair.
4. Check voltage against instructions.
5. a. Make sure the fan is operating and
that there are no obstructions to free
flow of air.
b. Operate at normal current and duty
cycle.
c. Replace High Temperature Warning
Light if defective.
6. Replace.
7. Replace.
8. Replace.
9. Replace.
10. Turn input power off (115V circuit is hot
when input power is connected). Check
thermostats with continuity meter –
should read short-circuit when machine
is cool. Replace if defective.
There are two thermostats; one on the
secondary lead and one on the choke.
Replace High Temperature Warning
Light if defective.
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