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Revision 6/F3590
©
Moffat Ltd, February 2005
6.1.4 FAN DOESN’T OPERATE
Fan motor faulty
Check the supply voltage across motor
terminals. If there is no voltage then check
the electrical connections of wiring.
If voltage is correct then check the oven fan
for free rotation. Remove any obstruction.
If fan is free to spin and the voltage at motor
terminals is correct, then the motor is faulty—
replace.
6.1.5 OVEN LIGHTS NOT ILLUMINATING—
DOOR OPEN (AUTOMATICALLY ON)
No power to lights
Check the supply voltage across lamp hous-
ing terminals at RH side rear of oven. If the
voltage is correct, replace the bulb (if faulty).
If the bulb is OK, check lamp housing.
Replace if faulty.
If there is no voltage, open oven door and
manually depress door microswitch actuator
at bottom right of oven. If this activates the
lights, then the microswitch actuator arm
behind the control panel requires adjustment.
Check voltage across micro-switch terminals
to neutral.
No power to thermostat
Check voltage to terminal 2 on oven
thermostat. If there is no voltage then check
voltage through terminal 5 and one on hold
relay (behind control panel). If there is no
voltage to terminal 5 then check wiring. If
there is no voltage to terminal 1 then check
that the hold relay (fig 6.1.2) has no power at
relay coil terminal 7. If relay coil is not ener-
gised (ie no power at 7) and no power out of
terminal 1, then the relay is faulty—replace.
Thermostat faulty
Set thermostat to 200°C or 400°F. Check the
voltage out of terminal 1 on the thermostat. If
there is no voltage then the thermostat is
faulty—replace.
If the voltage is correct and the heating light is
on then check all wiring to heating contactor.
If relay is energised (ie power at 7) then
’Roast n Hold’ switch is on and unit is in hold
mode. Turn off ’Roast n Hold’ and recheck
operation.
NOTE:
There should be no voltage across
these terminals when ‘Roast ‘n Hold’ is not
selected.
Figure 6.1.2
Burner faulty
With burner removed (refer 6.3.22), inspect
burner for leak holes in construction and
deterioration in mesh surfaces. Tears or
corrosion holes in mesh will be evidence of
faulty burner condition. Replace burner if
faulty.
NOTE:
Minor mesh surface buckling is
normal, and will not necessitate burner
replacement.
6.1.3 BURNER NOISY
pressure is unable to be adjusted, remove
regulator spring and check for correct type:
LPG/Propane
Blue spring
Natural
Gas
Green
spring
If the regulator spring and supply pressure are
correct, but the burner pressure is still
incorrect, check the gas valve solenoid
operation. With thermostat turned on check
voltage at connections to the gas valve.
110 volt models should have 24 volt ac supply
on both coils.
220-240 volt models should have 220-240
volts.
If voltage is correct when thermostat is on,
and gas valve is not opening then the valve is
faulty - replace. If voltage is incorrect, check
wiring and connections to ignition box and
refer to ignition box fault diagnosis.
7
5
3
1
8
4
Hold Relay