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Revision 1/F3586
6.1.10 NO TEMPERATURE CONTROL
(TEMPERATURE OVERRUN)
Heating contactor faulty
Refer 6.1.9
Thermostat faulty
With thermostat in off (vertical) position, the
heating indicator should be off. If not then the
thermostat is faulty—replace.
6.1.11 SLOW RECOVERY
Thermostat out of calibration
Place an accurate digital thermometer probe
in centre of oven. Set thermostat to 180°C or
355°F. Close the oven door and allow oven
thermostat to cycle on and off twice. Record
oven centre temperature for the next
thermostat on and off cycle. The thermostat
should cycle on and off between 165°C and
195°C or 330°F and 385°F when set to the
above temperature. If oven temperature is
outside these ranges, then the thermostat
requires recalibration.
NOTE: Thermostat cycling span should be
±15°C or 27°F
Indicator faulty
Check the voltage across the indicator
terminals. If the voltage is correct then the
indicator is faulty—replace.
If there is no voltage then check wiring.
6.1.12 NO THERMOSTAT HEATING
INDICATOR
No power to timer
Check the voltage at terminal 5 on underside
of the 180 minute timer.
Check that one lead of timer motor is con-
nected to terminal five of timer and the other
lead is connected to neutral of ‘Roast ’n Hold’
switch.
If voltage at terminal 5 is correct and wiring is
correct then the timer motor is faulty—replace
timer.
If there is no power at terminal 5, check for
power supply at terminal 4 of timer. If there is
voltage at terminal 4 and not at terminal 6 with
timer set, then timer switch is faulty—replace
timer.
6.1.13 ROAST TIMER (180 MINUTE) WILL
NOT TIME DOWN
Figure 6.1.8
Terminal 4
Terminal 1
Terminal 2
Terminal 5
Terminal 3
Terminal 6
If terminal 4 voltage is correct, check relay at
the base of the control housing behind control
panel is latched ON. If relay is ON then check
wiring.
If relay is not latched ON when ‘Roast ‘n Hold’
switch illuminated then check the voltage
across terminals 7 and 8 of relay coil (fig
6.1.5). If the voltage is correct but the relay is
in the off position then the relay is faulty—
replace.
If there is no voltage across 7 and 8 then
check wiring.
Element faulty (blown)
With the thermostat on and heating check
voltage across element terminals at RH side
of oven. If the voltage is correct then check
the current draw of element. If there is no
current draw then element is faulty—replace.
If there is no voltage then check voltage is
being supplied to each element coil from the
heating contactor. If no voltage to elements,
check contactor operation (refer 6.1.9) and
wiring.
NOTE:
Correct element current draw:
208 V : Inner Coil 12.9A ± 2.5%
Outer Coil 15.0A ± 2.5%
220 V : Inner Coil 13.6A ± 2.5%
Outer Coil 15.9A ± 2.5%
240 V : Inner Coil 12.5A ± 2.5%
Outer Coil 14.6A ± 2.5%