Measuring Resistance; Overheating Switch; Indication Of Power Supply Failure At The Last Welding; Configuring The Welding Unit - HURNER HCU 300 Manual De Instrucciones

9.2

Measuring Resistance

When the START/SET key was pressed to initiate a welding
process, the resistance value of the fitting is measured and
compared to the value entered as part of the read fitting
code. If the gap between the two values is smaller than the
acceptable tolerance given in the code, the welding process
starts. If the gap is greater than the preset tolerance, the
welding unit aborts welding and displays a "Resistance Er-
ror" message. Furthermore, it displays the actual resistance
value measured for the connected fitting.
The reason for a resistance error may be poorly contacting
and/or worn connection terminals. Therefore, if this error
occurs, check them for proper fit and, if worn, replace them
with new ones.
9.3

Overheating Switch

The welding process aborts if the temperature of the trans-
former in the welding unit is too high. The overheating cir-
cuit breaker for the transformer stops the welding if the
temperature reading is too high and the remaining welding
time is longer than 800 seconds. The display and the weld-
ing report will show an "Overheated" message.
9.4

Indication of Power Supply Failure at the Last Welding

The message "Power Supply Failure Last Welding" indicates
that the previous welding aborted because of a power sup-
ply failure. The reason may be too weak a generator or too
long or too thin an extension cable, or a tripped cut-out in
the mounting box. The next welding operation is still possi-
ble after acknowledging the message by pressing the STOP/
RESET key.
10

Configuring the Welding Unit

With the operator identity card, the welding unit can be
reconfigured. When the MENU key is pressed, the "Enter
Menu Code" message appears on the screen. After the code
was read from the card or entered manually (see the Info in
Sect. 5.2), the selection menu in Display 13 shows.
At "Settings," the parameters related to the welding unit it-
self and its operation can be set. At "Recording," the trace-
ability data that have to or need not be recorded and writ-
ten into the reports can be enabled or disabled. The desired
sub-menu is selected using the ñ and ò arrow keys. Then to
access that sub-menu, press the MENU key.
In both parts of the configuration menu, use the ñ and ò
18
EN
HÜRNER HCU 300 User's Manual
H Ü R N E R S c h w e i s s t e c h n i k G m b H
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35325 Mücke, Germany
>Settings
Recording
Version September 2022
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Display 13