Shellab SCO12WE-2 - Manual (Page 17)

16
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
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.D
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-Call Customer Service.
6/ controller failure
– confirm with front panel lights that controller
is calling for heat-Call Customer Service.
7/ OTP failure
– confirm with front panel lights that it is operating
correctly-Call Customer Service.
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.
Section
8