Shellab SGO3-2 - Manual (Page 12)

12
TROUBLESHOOTING
TEMPERATURE
Temperature too high.
1/ Controller set too high-see section 6.3
2/ Controller failed on
– call Customer Service.
3/ Wiring error – call Customer Service.
Display reads "HI" or "400"+.
Call Customer Service
Chamber temp spikes over set point and
then settles to set point.
Recalibrate – see section 6.4.
Temperature too low
1/ High limit set too low – see section 6.5.
2/ Controller set too low – see section 6.3.
3/ Unit not recovered from door opening – wait for display to stop
changing.
4/ Unit not recovered from power failure or being turned off
– ovens will
need several hours to warm up and stabilize.
5/ Element failure
– compare current draw to data plate.
6/ Controller failure – call Customer Service.
7/ High limit failure – confirm with front panel lights that Safety
Thermostat is operating correctly.
Display reads "LO"
1/ Bad probe or disconnected – call Customer Service.
2/ If ambient 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/ On F suffix models confirm that fan is moving and that amperage and
voltage match data plate
– check for air movement in chamber.
2/ Confirm that set point is set high enough –turn Safety Thermostat all
the way clockwise and see if OTP light comes on.
3/ Check connections to sensor.
4/ Check calibration
– using independent thermometer, follow
instructions in section 6.4.
Unit will not heat up at all
1/ Check amperage – amperage should be virtually at maximum rated
(data plate) amperage.
2/ do all controller functions work?
3/ Is the Safety Thermostat set high enough?
– for diagnostics, should
be fully clockwise with the OTP light never on.
4/ Has the fuse/circuit breaker blown?
5/ Has timer turned unit off?
Indicated chamber temperature unstable
Section
8