Shellab SSI10R-2 - Manual (Page 18)

SHEL LAB SI9/SI9R Shaking Incubator Operational Manual
18
Copyright © 2007 Sheldon Manufacturing. All rights reserved.
All specifications and features for this product are subject to change without notice.
What is the problem? Possible Causes To solve the problem...
The temperature indicated by the
Main Temperature Control is
lower
than my reference
thermometer.

The temperature inside the
unit has not yet stabilized
after the door has been
opened.

The temperature inside the
unit has not yet stabilized
after the unit has been
turned off or a power failure.

Controller is calibrated too
low.

Over Temperature
Protection (OTP) is set too
low.

Heating element failure.
1. Wait for the temperature
indicated by the Main
Temperature Controller to
stabilize. If you have just
turned the unit on, wait 24
hours for the incubator to
stabilize
at a warmer
temperature. A fluctuation of
no more than + 0.1

C is
normal.
If this is not the problem...
2. Recalibrate the Main
Temperature Controller. See
page 11.
If this doesn’t solve the
problem...
3. Be sure your reference
thermometer is certified.
If this is not the problem...
4. Turn the OTP fully clockwise.
If this doesn’t solve the
problem...
Call customer service. See
page 22

The Main Temperature Control
displays “LO”. Probe has shorted out.

Call customer service. See
page 22
The unit will not heat up to set
point. 
The amperage and voltage
of the unit’s power source
do not match the unit’s
requirements.

Over Temperature
Protection (OTP) is set too
low.

1. Make sure the power source
matches the data plate. (ie.
voltage, hz, etc.)
If this does not solve the
problem...
Turn the OTP clockwise until
the heating light or safety
light turns on.
The unit will not heat at all. 
The OTP is not set high
enough.

Temperature Controller
failure.

Element failure.

1. For diagnostics purposes,
turn the OTP fully clockwise.
See OTP section.
Call customer service. See
page 22
The indicated temperature inside
the chamber is fluctuating more
than + 0.1

C.

The unit has not had time to
stabilize
to ambient
conditions.

Temperature sensor not
positioned properly.

The temperature sensor is
faulty.

Electrical noise

1. If you have just turned the
unit on, wait 24 hours for the
incubator to stabilize at a
warmer temperature.
If this is not the problem...
2. If you have just opened the
unit’s door, wait for the
temperature to stabilize.
If this is not the problem...
3. Stabilize ambient conditions.
If this is not the problem...
4. Call customer service. See