Shellab SRI21D-2 - Manual (Page 15)

15
TROUBLESHOOTING AND SERVICE
When troubleshooting, always make a visual inspection of the incubator and it’s control console to
find loose or disconnected wires which may be the source of the trouble. In the event the
incubator does not operate properly, check the following before calling for service.
TEMPERATURE
Temperature too high
1/ controller set too high-see section 5.5
2/ controller failed on
– call Customer Service
Temperature too low
1/ Overtemperature Thermostat set too low – see section 5.8
2/ controller set too low – see section 5.5
3/ unit not recovered from door opening – wait for display to stop
changing.
4/ element failure
– see if HEATING light is on; compare current
draw to data plate.
5/ controller failure
– confirm with front panel lights that controller is
calling for heat.
6/ Overtemperture Thermostat failure
– confirm with front panel
lights that Thermostat is operating correctly.
7/
loose connection – check shadow box for loose connections.
Unit will not heat over a temperature
that is below set point
1/ confirm that fan is moving and that amperage and voltage
match data plate
– check fan motor and feel for air movement in
chamber
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
3/ check calibration
– using independent certified thermometer,
follow instructions in section 5.6
Unit will not heat up at all
1/ verify that controller is asking for heat by looking for controller
light
– if pilot light is not on continuously, there is a problem with the
controller.
2/check amperage
– amperage should be virtually at maximum
rated (data plate) amperage.
3/ do all controller functions work?
4/ is the Thermostat set high enough?
– for diagnostics, should be
fully clockwise with the pilot light never on.
5/ has the fuse/circuit breaker blown?
Indicated chamber temperature
unstable
Section
7