Shellab SHO1-2 - Manual (Page 15)

Maintenance and Troubleshooting
15
Troubleshooting
The following table shows a list of problems and their corresponding solutions. If these
instructions do not correct the problem, call Customer Service for further assistance.
Table 1 Problems and solutions
Problem Action
The unit will not turn on. 1 Verify that the power cord is plugged into the
oven and power source.
2 Verify that the power switch is ON .
3 Check the fuse as described in “Replacing
the inli ne power fuse” on page 15 and replace
if blown.
Temperature is too high. 1 The controller might be set too high. To set
the oven temperature, see “To set a
temperature” on page 12.
Display reads “HI”. 1 Check if the set temperature is below the
room temperature.
2 Turn the unit OFF . Wait for five seconds and
then turn it on to see if the error message
disappears.
Chamber temperature overshoots the set point
and then settles to the set point. For hybridization units, ±1 ° of set point may be
normal. To re
calibrate the oven, see “To
calibrate the oven” on page 13.
Temperature is too low. 1 The controller might be set too low. To set
the oven temperature, see “To set a
temperature” on page 12 for information on
setting the oven temperature.
2 The unit may not have recovered from
opening the door; wait for the display to
stabilize.
3 The unit may not have recovered from a
power failure or from being turned off. Ovens
usually will need two hours to warm up and
stabilize.
Display reads “LO”. The ambient temperature might be below the
temperature range of the unit. Refer to
“Technical and Environmental Specifications”
on page 6.
The unit will not heat over a temperature that is
below the set point. 1 Confirm that the fan is moving. Check fan
motor motion and feel for air movement in
chamber.
2 Confirm that the supply amperage and
voltage match the data plate.
3 To calibrate the oven, see “To calibrate the
oven” on page 13.
The unit will not heat up at all. Make sure that the circuit breaker and fuse
have not blown and are still operating correctly.