CD1000 Pin Welder Instruction Manual
K.C.D. Studwelding, Cheltenham, Victoria. Tel: 03 9584 1588, Fax: 03 9584 1688
TROUBLE SHOOTING FOR CD1000 WELDERS
The following trouble shooting procedures are to aid in the quick location of machine faults.
In our experience we have found that 70% of machine breakdowns occur because of broken
wires within the trigger and weld cables. This is usually caused by people misusing the
equipment and dragging the machine along by the gun leads.
PROBLEM 1. WELDER DOES NOT TURN ‘ON’
(No red light on front panel)
Possible causes: 1. Blown Fuse.
Replace 7.5 amp and if the fuse does not blow again, check to see that
another fault, ie shorted weld capacitor (C5-C8), has not caused the
fault.
2. Faulty power lead.
Check for break in 240-volt supply cable. Usually breaks occur where
the cable enters the machine.
PROBLEM 2. WELDER TURNS ON (indicator lamp lights) BUT NO CHARGE
APPEARS ACROSS THE WELD CAPACITORS.
Possible causes. 1. Faulty relay RLY2.
If the relay RLY2 has failed to energise when the machine is switched
on, RLY1 will energise preventing weld capacitors to charge via Q3.
Change relay RLY2.
2. Faulty transformer.
An unusual fault but transformer secondary voltages should be
checked.
3. Open circuit or not switching on.
Check Q3 and also gate circuit components R14 and D5.
4. Faulty contact on relay RLY1 (RLY1/1)
Change relay if necessary.
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