Moffat turbofan E31, Руководство по обслуживанию, Страница: 21 / 44

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Revision 2/F3506
6.1.10 NO TEMPERATURE CONTROL
Thermostat faulty
With thermostat in off (vertical) position, the
heating indicator should be off. If not then the
thermostat is faulty—replace.
Check that the thermostat phial is in correct
location and check for broken capillary tube—
replace if damaged.
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 regain temperature. If tempera-
ture overshoots by 50°C and continues,
switch off and 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
6.1.12 BOTTOM ELEMENT NOT WORKING
Element faulty (blown)
With the thermostat on and heating check
voltage across bottom element terminals at
rear 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.
Element faulty / blown
NOTE: In bake mode (50—270°C or 100—
550°F) the outer coil only of the top element
assembly operates. The inner coil works only
when in grill or broil mode.
With thermostat on and heating check voltage
across top element terminals at rear of oven.
If voltage is correct then check current draw of
the element. If there is no current draw then
the element is faulty—replace.
If there is no voltage check voltage is being
supplied to the top element from terminal two
on the switch block mounted to front of
thermostat.
If voltage is correct then check wiring.
NOTE: Top outer element current draw:
208V : 3.8A ± 5%
220—240V: 3.5A ± 5%
6.1.13 TOP ELEMENT NOT WORKING (IN
BAKE MODE—NOT GRILL / BROIL)
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.
6.1.14 NO THERMOSTAT HEATING
INDICATOR
Element faulty / blown
With thermostat in grill or broil position (fully
clockwise), check that the grill indicator on the
control panel indicates. If not, then check the
voltage at terminal P5 on the thermostat
switch (fig 6.4.1). If there is no voltage check
that the switch has power on terminal 5. If
there is power at terminal 5, but not at P5
when thermostat is in grill position, then the
switch is faulty—replace thermostat assembly.
If grill indicator is illuminated, but the top inner
grill element is not functioning, check the
voltage at the top inner element coils at rear
of oven. If the voltage is correct then check
current draw of element. If there is no current
draw then element is faulty—replace.
6.1.15 GRILL NOT WORKING
If there is no voltage then check voltage is
being supplied to bottom element from termi-
nal 6 on switch block mounted to the front of
the thermostat (fig 6.4.1). If no voltage at 6
Figure 6.1.4
Bottom Element
Terminals
then check for voltage at terminal P6. If
power to P6 (and none to 6), then the
thermostat is faulty—replace.
NOTE: Correct bottom element current draw:
208 V : 9.6A ± 5%
220—240V: 8.7A ± 5%