Shellab SMI2E-2 - Manual (Page 10)

10
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 the
trouble.
TEMPERATURE
Temperature too high
1/ controller set too high-see section 5.3
2/ controller failed on
– call Customer Service
3/ wiring error – call Customer Service
Temperature too low
1/ controller set too low – see section 5.3
2/ unit not recovered from door opening – wait for heating indicator to turn
off.
3/ unit not recovered from power failure or being turned off
– incubators
will need 2 hours to warm up and stabilize
4/ element failure
– see if heating indicator is on; compare current draw to
data plate.
5/ controller failure
– confirm with heating indicator that controller is
calling for heat.
6/ wiring problem
– check all functions and compare wiring to wiring
schematic in manual – especially around any areas recently worked on.
Unit will not heat over a temperature that
is below set point
1/ confirm that amperage and voltage match data plate.
2/ check connections to sensor
3/ check calibration
– using reference thermometer, follow instructions in
section 5.2 and 5.3
Unit will not heat up at all
1/ verify that controller is asking for heat by looking for Heating indicator
light
– if pilot light is not on continuously during initial start-up, there is a
problem with the controller.
2/check amperage
– amperage should be virtually at maximum rated
(data plate) amperage.
3/ has the fuse/circuit breaker blown?
Indicated chamber temperature unstable
1/ ±0.1 may be normal.
2/ is ambient radically changing
– either door opening or room airflow
from heaters or air conditioning? – stabilize ambient conditions.
3/ calibration sensitivity – call Customer Service.
Will not maintain set point
1/ assure that set point is at least 5 degrees over ambient room
temperature.
2/ see if ambient is fluctuating; if so, stabilize ambient.
Section
7