Measuring Resistance; Overheating Switch; Indication Of Power Supply Failure At The Last Welding; Configuring The Welding Unit - Hürner HCU 300 mini Manuel Utilisateur

by pressing the ð key at the "Enter Fitting Code" screen. They are
the software version, the serial number of the unit, the date of the
next scheduled maintenance, and the number of currently available,
unused reports. To quit this screen, press the STOP/RESET key.
If the scheduled service is overdue, a service due message appears on
the screen as soon as the unit is plugged into the mains or genera-
tor power supply. This message has to be acknowledged by pressing
START/SET.
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
Error" 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 transformer in
the welding unit is too high. The overheating circuit 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 welding 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 supply 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 possible 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 ap-
pears on the screen. After the code was read from the operator card,
the selection menu in Display 11 shows.
At "Settings," the parameters related to the welding unit itself and
its operation can be set. At "Recording," the traceability data that
have to or need not be recorded and written 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 arrow keys
to select the desired set-up option. Use the ð arrow key to toggle
between "on" and "off" for that set-up option.
If a "M" is shown next to a set-up option, this indicates that a sub-
menu is accessible here by pressing the MENU key.
14
EN
HÜRNER HCU 300 mini 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
Nieder-Ohmener Str. 26
35325 Mücke, Germany
>Settings
Recording
Version November 2015
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-M-
Display 12