shelolab SLFHP522-H, Installation And Operation Manual

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OPERATION
H
IGH
T
EMPERATURE
L
IMIT
A
CTIVATED
The High Limit system blocks heating in the oven chamber if the chamber
temperature meets or exceeds the present High Limit setting. Heating remains
disabled until the High Limit cutoff is manually cleared by the oven end-user.
Indicators
Two alternating alert screens flash when a High Limit cutoff is active. Activation of
the cutoff is also accompanied by a click. Additionally, an illuminated “4” on the
bottom-most display block indicates the oven is routing electricity away from the
heating elements.
High Limit Activation Conditions
•
The current temperature setpoint is above or near the High Limit cutoff setting. The
High Limit should be set to at least 10°C above the highest intended temperature of
your heating application. Possible causes include:
•
A heat source in the oven chamber is pushing the oven temperature above
the limit setting.
•
Significant outgassing in the chamber may be interfering with the measured
temperature.
•
Attempting to heat a significant mass of product or samples may trigger a
temperature overshoot.
•
The main controller circuitry or sensor probe has failed.
If you suspect an ignition event in the oven chamber or hardware failure, turn off the oven and
wait for the oven to cool to room temperature before opening the chamber door. Contact
Customer Support for assistance.
Clearing the High Limit Heating Cutoff
•
Clearing the cutoff restores power to the oven heating elements.
•
The oven chamber temperature must be below the High Limit cutoff setting in order to clear
the cutoff.
•
Always verify it is safe to resume heating before clearing the High Limit cutoff.
Push the Reset button.
•
The alert screens will flash 2 additional times before the oven controller ends the cutoff.
Alternating Alert Screens
Attention Screen
Heating Off