Overtemp Shutdown; Undertemp Shutdown (Shke8000-7 & Shke8000-8Ce) - Thermo Scientific MaxQ SHKE8000 Series Operating And Maintenance Manual

Section 2
Operation
Alarms (continued)

Overtemp Shutdown

Undertemp Shutdown
(SHKE8000-7 & SHKE8000-8CE)
2-8 MaxQ SHKE8000 Series Shakers
Both audible and visual alarm warnings for these nine parameters are
provided by the shaker. Visual flashing of the three diagonal indicator
lights on the control panel, a progression of alarm messages on the display,
and an audible tone alerts the operator that an alarm condition has
occurred, or currently exists.
For convenience, the audible tone is muted by pressing the Silence button,
but will ring back in about 15 minutes if the alarm condition is still
present, for most alarms. However, the alarm indicator lights and alarm
messages continue until the alarm condition is corrected by the operator.
After the root cause of the fault has been corrected, pressing the Silence
button will clear the alarm message from the display. The audible tone will
ring back in about 30 minutes for the Check Belt and Check Fuse alarm if
the alarm condition is still present. These alarm messages clear from the
display when the unit is turned back on after correcting the alarm
condition and the alarm indicator lights steady from flashing.
As discussed in the Configuration section of this manual, the audible alarm
feature may be turned off to suit operator or laboratory needs. Refer also to
the Alarm Message/Corrective Actions chart in the Service section of this
manual.
Overtemp Shutdown alerts the operator
that the overtemp setpoint has been
exceeded by a few tenths of a degree. The Overtemp Shutdown message
displays and the heaters turn off, but the platform and blowers continue to
operate.
In the alarm state, the audible alarm is muted by pressing the Silence
button, but will ring back in about 15 minutes if the alarm condition is
still present. However, the alarm message and indicator lights persist until
the fault is corrected. Afterward, the remaining relevant alarm components
are cleared by pressing the Silence button.
Undertemp Shutdown alerts the operator
that the chamber temperature has
dropped below the Undertemp setpoint by a few tenths of a degree. The
Undertemp Shutdown message displays and the refrigeration turns off, but
the platform and blowers continue to operate.
In the alarm state, the audible alarm is muted by pressing the Silence
button, but will ring back in about 15 minutes if the alarm condition is
still present. However, the alarm message and indicator lights persist until
the fault is corrected. Afterward, the remaining relevant alarm components
are cleared by pressing the Silence button.
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