Blue Seal E9311, Service Manual

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-22-
Revision 4/F3544
Convection Oven © Moffat Ltd, April 2005
6.1.5 60 MINUTE TIMER NO TIME UP
BUZZER
Buzzer faulty
With timer in ‘zero’ position, check the buzzer
at top of control panel (inside) for voltage
across terminals. If voltage is correct then
buzzer is faulty—replace.
If there is no voltage, then check wiring.
Timer not switching on buzzer
With timer in zero position, check voltage to
top connection (terminal 1) and bottom
connection (terminal 2) of timer. If there is no
voltage at terminal 1 then check wiring.
If no voltage at terminal 2 then timer is
faulty—replace.
NOTE: Timer will continue to run for
approximately three minutes below zero.
Buzzer and time up indicator will continue
until the timer manually switched off (to
vertical position).
6.1.6 60 MINUTE TIMER NO TIME UP
INDICATOR
Indicator faulty
With the timer in the zero position, check for
voltage across the indicator light. If correct,
then the indicator light is faulty—replace.
If there is no voltage then check wiring.
Buzzer
Buzzer Terminals
Figure 6.1.2
Power
Relay
Figure 6.1.3
Ensure that the power switch on the unit is
turned on, and check for voltage at terminal 4
of the power relay. If there is no voltage at 4
then check that the relay is energised (i.e.
voltage between terminals A and B. If not
then check wiring. If there is voltage and
there is no power at terminal 4 then the relay
is faulty - replace.
If there is voltage at terminal 4 then check the
hold relay and the thermostat (refer below).
6.1.9 NO HEAT
Power relay faulty - From S/N 232054
Check voltage to terminal 7 on power relay
(on rear panel of oven). If there is no voltage
then check wiring to the relay.
Hold mini-contactor faulty - to S/N 232053
Check voltage to terminal 1 on oven
thermostat. If there is no voltage then check
voltage through terminal 21 and 22 on mini
contactor (inside control panel). If there is no
voltage to terminal 21 then check wiring. If
there is no voltage to terminal 22 then check
that the contact indicator on centre of the
contactor is in ‘0’ position. If indicator is in ‘0’
position and there is no voltage to 21 then
replace contactor.
If indicator is in the ‘1’ position then check the
voltage across contactor coil terminals A1 and
A2.
Hold relay faulty - From S/N 232054
Check voltage to terminal 1 on oven
thermostat. If there is no voltage then check
voltage at terminals 1 and 7 on hold relay
(inside control panel). If there is no voltage to
terminal 7 then check wiring. If there is no
voltage at terminal 1 then check that the relay
is not energised (i.e. there should be no
power between terminals A and B on the
relay). If the relay is not energised, and there
is no voltage at terminal 1 then the relay is
faulty - replace.
NOTE: The relay should only be energised
when the ’Roast ’n Hold’ switch is depressed.
If there is voltage at terminal 1 then check all
wiring to the thermostat.
A
7
4
1
B
Figure 6.1.4