Nelson Nelweld 4000, Руководство по эксплуатации и обслуживанию

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Nelweld Operations and Service Manual
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Mechanical Problems Occurring During Welding
Problem Possible cause Solution
Welding gun lifts, but no weld
takes place (continued). No pilot arc current is detected
(E010)
Check shunt wiring for faults.
If no problems are found, verify that the pilot arc
board is functioning. When the board is functioning
properly, two green LED’s, D6 and D12, should be
illuminated. If either is not illuminated, check for
loose cables connected to the board. Also, check
and replace any fuses (3) that might have blown.
Those fuses are located on the Pilot Arc PCB.
If there are further problems, contact your qualified
Nelson Technical Service Representative,
If in dual gun operation, another
welder may be attempting to weld
at the same time.
Wait for the other welder to finish the cycle, and
retrigger.
Shorted gun coil (E007)
If the coil is shorted, yellow LED D2 on the control
board will be illuminated. Correct the short. Unit
power must be reset for this error to be corrected.
Open gun coil (E008)
Locate the break in the coil circuit. Check all lines
between the gun coil and the power PCB board for
loose connections or broken lines.
Welding gun does not lift when
the trigger is pulled.
Gun trigger not released after last
weld.
Trigger may be stuck or the control cable may be
shorted in the closed position. This will be
indicated by a lit “Trigger” LED on the front panel.
Physically release or disconnect the trigger.
Another welder is welding.
Wait for the other welder to finish the cycle, and
retrigger.
Wiring harness disconnected.
Master control board (right) cannot communicate
with the slave control board (left) if the wiring
harness is disconnected. Ensure that the harness
runs between the Master JP3 and Slave JP3.
Second weld gun does not fire
when welding in dual-gun mode.
Board communication problem.
(E006) Error displays on the Master front panel display
(right). Replace control board(s).
Duty cycle exceeded
Verify that application is within the duty cycle
limits provided in the
Section 4.9.1 of this guide. If
the duty cycle is exceeded, reduce weld rate.
Output louvers blocked
Move power source to allow room for airflow out
of the cabinet rear.
Input louvers blocked
Remove obstruction from louvers on the cabinet
front.
Thermal switch may be faulty
A faulty thermal switch may generate excessively
low trip-off temperatures. Replace thermal switch.
Unit goes into thermal shutdown
repeatedly and/or often.
Excessive contaminates inside
machine are preventing proper
cooling Blow out machine as indicated in the Section 5.2 of
this guide. Move machine away from the source of
the contamination.