Labnet 311DS Environmental Shaking Incubator (I5311-DS and I-5311-DS-230V) - Manual (Page 7)

TROUBLESHOOTING GUIDE
PROBLEM POSSIBLE SOLUTION
Oven will not power up or not heat Check power cord, outlet and unit circuit breaker
Shaking platform will not operate Check timer set to Hld or a time setting
Check that nothing is blocking shaker platform
Press shaker STOP/START button
Temperature too high Check set point and readjust if necessary
Check calibration
Chamber temperature goes above set Normal operation in initial heat up or if door
point and settles back to set point opened for a long period
Temperature will not remain stable Check that set point is at least 5C above ambient
or display shows “LO” (or 10°C above ambient when shaker is on) which is
minimum operating point
Indicated temperature is unstable A slight variation of +/-0.1C is normal. Larger fluctua-
tions may be ambient variations from drafts, door
opening and closing, a fan obstruction or failure or
electrical noise from RFI (motors, etc.)
Temperature is too low If door has opened, unit may not have recovered yet.
Confirm temperature set point.
Safety thermostat set too low.
Unit will not heat above temperature Confirm set point. Check temperature of chamber
that is below set point with a thermometer and recalibrate if needed.
Temperature display and reference Be sure that unit has been allowed to stabilize for
thermometer do not match 1 hour. Thermometer should be suspended in
the chamber and not touching any surface. Only
certified reference thermometers should be used.
Cannot adjust set point or calibration Turn unit off for 5 seconds to reset. If problem
or display persists call service persists, call for service.
Unit calibrated at one temperature This can be a normal condition if temperatures or load
and not at another vary widely. For best accuracy, calibrate at set point
TECHNICAL SUPPORT / SERVICE
Should your I-5311-DS shaking incubator require service, call Labnet International’s Service
Department at 732-417-0700 between the hours of 9:00am and 5:00pm EST. If service
necessitates the return of the unit to Labnet’s Service Department, a return authorization (RA)
number must first be obtained and a decontamination certificate completed. The unit must be
thoroughly decontaminated before shipping. The unit must then be sufficiently packed for
shipment. Any shipping damage on returned units will be the customer’s responsibility.