B&C Technologies M720 Dryer Control (DE, DP, DI Series) - Manual (Page 37)

4.7.3 Restore Factory Settings
Restoring factory settings should normally not be necessary because all parameters are stored in
non- volatile memory, which does not need a battery to retain its data. But, in some cases it can be
useful to be able to go completely back to factory settings.
If the item Restore factory settings is chosen from the System setup menu, and the password level
is sufficient, the screen for restoring factory settings will be displayed. If the password level is too
low, the password screen will be activated. A password level 2 is necessary to get access to the
factory settings screen.
If the screen for restoring factory settings is displayed, the factory settings can be restored by push-
ing the S
HIFT key and N UMERIC 9 key at the same time. When factory settings are restored, the
overview screen will be activated again. Because restoring the factory settings is a time consuming
process, the normal program cycle can be halted for a while. During the time needed to restore all
factory settings, the beeper will sound continuously.
Please note that restoring factory settings will restore the factory settings of all drying programs
and the settings of the machine parameters. These parameters are set as described in Chapter 6
on page 43. Restoring factory settings does not change the configuration parameters. They will
not be influenced by this operation.
4.7.4 Reset Maintenance Request
With machine parameter number 5 (see section 4.5.3 on page 26) it is possible to set a maintenance
request count. For example, if machine parameter 5 is set to 500, and 500 batches are done the
display will show Maintenance request before the machine can be started for a new program cycle
(see also Chapter 5, Alarms on page 39). This Maintenance request will be active until the message
is reset via the System setup menu item Reset maintenance request. If this item is selected a special
password must be entered (see Section 4.2 on page 16). For resetting the maintenance request the
password is 1111. The remaining number of batches until the next maintenance request message
is displayed can be seen in the non-resettable counter set, see section 4.5.3.
4.7.5 Enter Unlocking Code
In special circumstances it is possible that the control system locks itself. If the control panel is
locked, message 5 will be displayed. To unlock the controller again, it is necessary to enter an
unlock code. In the Enter unlocking code screen, the serial number of the controller is displayed.
With this serial number, the machine manufacturer is able to determine the unlocking code which
should be used for this controller. When the controller is locked it will automatically show the
enter unlocking code screen after every restart.
34