Troubleshooting - bredent 400 Manual De Funcionamiento Y Mantenimiento

9. Troubleshooting

Description of the error/questions
The menu selection is not shown on the display after pressing the main
switch.
The thermopress unit has been correctly installed. After a short time, the
injection performance decreases. Objects are not filled completely.
The unit fails to reach the desired temperature, or does so extremely slowly.
The material does not melt.
The injection process cannot be started. No further error messages are dis-
played.
What do I do if the piston becomes wedged in the forward position?
Incomprehensible messages are shown on the display screen.
Motor temperature too high!
Housing temperature too high!
There are large quantities of aluminium residue in the heating cylinder.
The display shows "Cooling down".
22
Please wait!
Please wait!
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Possible causes, elimination
1. Check the fuses for the power supply.
2. Check the cable connections to the unit.
3. Mains voltage does not correspond to the value indicated on the type-plate.
4. Socket is not live.
5. Change the unit fuse/10 [A] microfuse, see 3.2 Caution.
1. The heating chamber or the front side of the pressure piston is
contaminated.
2. Too little or no thermopaste (lubricant) has been used for aluminium
cartridges (increased cartridge friction).
3. Check program settings. If necessary, correct them once the
parameters for injection moulding have been entered.
1. Compare the mains voltage with the technical data of the unit.
2. One or more heating elements may be defective.
3. The temperature probe is not showing the correct value - use the digital
thermometer and temperature sensor to calibrate it (optional accessories:
99300364 and 99300366).
4. Important: Annual checking of the target/actual temperature ensures
flawless injection moulding.
5. Incorrect parameters have been entered for the thermoplastic material;
please check those parameters and, where necessary, adjust the program to
suit the material.
1. Check that the position of the heating cylinder and its filling is identical to
that shown on the display.
2. The heating cylinder was not brought to the final position during fixing of
the flask (displaced).
3. Use the selection lever to move the heating cylinder to the desired final
position (1 or 2) until it stops.
4. Check that the flask chamber lid (protective lid) is correctly closed.
5. Check that the right rear contact switch is functioning correctly.
1. Please call the bredent Customer Service Team. Germany.
Tel. +49 7309 872-22.
1. Unit is not sufficiently ventilated. Please check that the unit is set up in an
adequately ventilated area and, if necessary, adapt the area accordingly.
The unit's ventilation slits must be kept free at all times in order to prevent
overheating within the unit. See also 3.2 Positioning/functioning of the
unit.
2. Switch the unit off and wait approx. 2 minutes until a quiet "click" is heard
(there is a delay before the frequency converter switches off), then restart
the unit.
1. The unit can no longer be used, as the thermal protection switch has been
activated. Ensure that the unit is set up in an adequately ventilated area.
2. Abort the program using the CE key and allow the injection moulding unit
to cool down while still switched on (ventilation mode).
1. Too little or no thermopaste has been applied to the aluminium
cartridge.
2. Increased abrasion of the aluminium cartridges; the residue is deposited on
the inside wall of the heating cylinder (narrowing/diameter is reduced).
3. If necessary, have the heating block replaced.
1. The target temperature currently programmed for the insertion of the filled
aluminium cartridges is below that of the heating cylinder (injection
moulding of different materials)
2. Wait until the unit cools down and the temperature is reached.