VALCO MELTON D-90, Manual

Page: 57 / 150

5-18 Valco Cincinnati, Inc.
Section 5 – Setup MM125 - D-90 Hot Melt Unit
The Over Temperature Alarm setting pertains to all active zones.
The number entered on this screen, is the amount of degrees ABOVE each
zone’s set temperature that a zone can heat to before activating the Over
Temperature Alarm.
If any zone goes into Over Temperature Alarm, the heaters of the affected
zone are automatically shut off. If the Over Temperature Alarm message
appears, it can be cleared by pressing the ‘OK’ key.
If the Over Temperature Alarm
condition lasts for a duration of 2.5
minutes, the master control relay will be
deactivated removing power from the
heating zones, and the Fault History
screen will appear. After correcting the
cause of the fault, the unit must be
powered off and back on again to reset
the control and reactivate the master
control relay.
The over temperature alarm tolerance range is 9°F to 108°F (5°C to 60°C).
The factory default setting is 27°F (15°C).
This parameter can be accessed in Password Level 2 or higher (see
Appendix A - Password Levels).
Over
Temperature
Alarm