Shel lab SVAC9-2, Installation And Operation Manual, Page: 36 / 46

36 | P a g e
OPERATION
OTL Activation During Normal Operations
Possible causes:
•
A user has set the Over Temperature Limit below the current set point for either an active
heating profile or single constant-temperature set point.
•
An external heat source or heat source inside the chamber is causing the chamber air
temperature to spike.
•
The temperature controller or its sensor probe have failed and must be replaced in order to
maintain safe operation of the oven.
If the OTL activated during normal operations, adjust the control dial clockwise halfway to the next
dot to increase the setting. Then restore power to the controller by pressing the red Reset button. If
the OTL continues to interrupt heating of the oven chamber and there no obvious external sources
of nearby heating (autoclaves, another oven), depower the oven and allow the oven chamber to cool
before opening the oven door or troubleshooting.
End of procedure
H
EATING
P
ROFILES
Please see the Programming Guide – Watlow EZ-Zone Controller Heating Profiles for instructions on how
to program automated heating recipe profiles. This document comes included with the oven and provides
illustrated explanations covering all major heating profile functions and programming steps.
The Watlow controller can hold 4 ten-step heating profiles. Additionally, profiles may be combined
by programming profile steps sequentially to run as a single profile of between 2 and 40 steps.
EZ1 Button
Launches and
Aborts Profile 1
Home Page:
Profile Active
Indicator