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Alarms and Alarm
Conditions
Thermo Scientific
Section 4
Caution The procedures outlined in this section must be performed by
persons experienced in servicing and maintaining laboratory equipment.
Lockout and tagout electrical power connections whenever removing
cabinet panels or working on electrical or motor control components. To
avoid damage to solid state electrical components, proper grounding
techniques must be observed whenever working on this shaker.
With the exception of the chamber HEPA filter, the Model SHKE435HP
and SHKE436HP Orbital Shakers contain no user-serviceable
components.
If the microprocessor control system senses a fault, malfunction or
abnormal operating condition, alarm messages appear on the display.
These messages will be helpful should service or repair assistance be
necessary. Refer to the table below and the alarm matrix at the end of this
section.
Table 4-1. Alarms
Alarm Message
Fault Condition
Overtemp Shutdown
System shutdown due to overtemperature condition
Main Temp Sensor
Temperature sensor has failed
Over Temp Sensor
Temperature sensor has failed
Temperature is High
Temperature tracking has sensed higher temperature than setting
Temperature is Low
Temperature tracking has sensed lower temperature than setting
RPM is High
RPM tracking has sensed shaker speed higher than setting
RPM is Low
RPM tracking has sensed shaker speed lower than setting
Power Failure
Power has failed during shaker operation or shaker power is off for more than 1.5 hours
Cycle Complete
Countdown to zero time has been reached. Unit stops.
Check Belt
Motor V-belt has broken or slipped
Audible is Disabled!
Continuously notifies operator that audible alarm has been disabled
Platform Stalled
Free movement of the platform has been obstructed
Check Fuse
Power loss to motor drive circuit board, most likely the primary drive motor fuse has blown
Service
s
Orbital Shaker
4-1
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