Gullco GK-203-400-12 - Manual (Page 16)

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Under normal circumstances overheating should not occur but if the remote pendant
was resting on a pre-heated work piece for a long period of time for example, then it will too
be pre-heated. As a precaution the remote pendant should not be allowed to come into
contact with hot material (above 96°C/205°F) for extended periods of time.
ER 7, Limit switches error: the E.A.H.S. has detected a fault in the limit switch
communication that could be a result of a damaged control cable between the slide and the
pendant. Re-check all relevant connections to resolve the issue.
The E.A.H.S. system will sound audible warnings to alert the operator of a change in status
or a possible problem.
1) During calibration when the switch is moved from Manual to Auto while welding
current is detected or when the switch is in the Auto position and a arc is struck, the
remote pendant will sound one (1) beep for one (1) second duration. This will
indicate to the operator that the E.A.H.S. is now in tracking mode.
2) While the E.A.H.S. system is tracking (current detected) in Auto mode and a limit
switch is triggered (top or bottom of slide) the remote pendant will sound three (3)
beeps per second and also flash the corresponding slide indicator L.E.D. on the
remote pendant control. This is to let the operator know that the slide has reached its
maximum travel in that direction. If this occurs the E.A.H.S. will continue to try to
track in Auto mode with the three (3) beeps per second alarm continuing until the
operator makes adjustments to the bracketry that the slide is mounted to, or shuts
down the process and adjusting the brackery to permit more travel in the desired
direction. Note: even though the E.A.H.S. will remain tracking during this alarm it will
only be able to make height adjustments in one direction until it moves off of the limit
switch, this could result in reduced control and quality of the welding process.
3) While welding & in Manual mode, if the operator decides to switch to Auto mode and
the E.A.H.S. system detects the conditions stated in the above (point 2) the process
will be treated the same.
4) While the E.A.H.S. system is tracking (current detected) in Auto mode if the operator
makes adjustments to the arc height by either the fine adjustment slide knob or
coarse adjustment slide toggle switch, if the resulting target current would go beyond
the 10 amp (low limit) or 388 amp (high limit) the control will not let the operator
make any further adjustments out of the range. This is done by limiting the slide
movement. The control will sound a single beep each time the operator attempts to
move the slide beyond these limits with the knob or the toggle switch.
5) In the case that the Auto cycle is initiated during welding and the E.A.H.S. detects a
current above 396 amps (example 420 amps) the control will continually beep and
the target current will be set at the maximum target of 388 amps.
Note: When the optional 500amp sensor is used the low and high limits in points 4)
& 5) are 12 & 485 amps respectively.