Shellab SCO10W-2 - Manual (Page 19)

TROUBLESHOOTING
CAUTION: Extreme caution must be exercised any time access is made into areas
housing electrical components. Repair, replacement or adjustment of components in
these areas must only be done by qualified technicians familiar with electrical circuitry and
the operation of the chamber.
Always make a visual inspection of the incubator and control console when troubleshooting. Look
for loose or disconnected wires or tubing, which may be the source of the trouble.
NOTE: IF BREAKERS TRIP REPEATEDLY, OR FUSES BLOW REPEATEDLY, CALL
QUALIFIED SERVICE PERSONNEL.
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
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 temp spikes over set point and
then settles to set point
recalibrate – see section 5.4
Temperature too low
1/ OTP too low – see section 5.8.E
2/ controller set too low – see section 5.3
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/ OTP failure
– confirm with front panel lights that it is operating
correctly
8/ wiring problem
– check all functions and compare wiring to diagram
in section 10.0, especially around any areas recently worked on
9/ loose connection
– check shadow box for loose connections
Display reads "LO"
1/ sensor is plugged in backwards – reverse sensor wires to controller
2/ if ambient room temperature is lower than range of unit – compare
set points and ambient temperature to rated specifications in section 9.0
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 motion in shadow box and feel for air movement
in chamber
2/ confirm that set point is set high enough ,turn OTP counterclockwise
Section
10