Shellab SMI39-2 - Manual (Page 12)

12
TROUBLESHOOTING
FOR PERSONAL SAFETY, ALWAYS DISCONNECT THE POWER BEFORE
SERVICING.
Always make a visual inspection of the incubator and control panel when
troubleshooting. Look for loose or disconnected wires that may be the source of
trouble.
TEMPERATURE
Temperature too high-display and
reference thermometer don’t match
1/ Controller set too high-see section 5.5.
2/ Controller failed on
– call Customer Service.
3/ Wiring error – call Customer Service.
Display reads "HI" or "400"+
Probe is unplugged, is broken or wire to sensor is broken – trace wire
from display to probe; move wire and watch display to see intermittent
problems.
Chamber temperature spikes over set
point and then settles to set point
Recalibrate – see section 5.6.
Temperature too low-display and
reference thermometer don’t match
1/ High limit set too low - see section 5.7
2/ Controller set too low
– see section 5.5.
3/ Unit not recovered from door opening – wait for display to stop
changing.
4/ Unit not recovered from power failure or being turned off
– incubators
will need 24 hours to warm up and stabilize.
5/ Element failure
– see if HEATING light is on; compare current draw to
data plate.
6/ Controller failure
– confirm with front panel lights that controller is
calling for heat.
7/ Overtemperature failure
– confirm with front panel lights that
Thermostat is operating correctly.
8/ Wiring problem
– check all functions and compare wiring to owner’s
manual – especially around any areas recently worked on.
9/ Loose connection – call Customer Service.
Display reads "LO"
1/ If ambient temperature is lower than range of unit – compare set
points and ambient temperature to rated specifications in section 9.0.
2/ Sensor is plugged in backwards
– call Customer Service.
Unit will not heat over a temperature that
is below set point
1/ Confirm that fan moving and that amperage and voltage match data
plate
– check fan motor motion by removing top panel of the unit.
2/ Confirm that set point is set high enough –turn Thermostat all the way
clockwise and see if HEATING light or OVERTEMP light comes on.
Section
8