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E31 CONVECTION OVEN
SERVICE
MANUAL
E31 Convection Oven
Revision 3/F3505
-1-
© Moffat Ltd, April 2005
Applies to units from S/N 40423
WARNING: ALL INSTALLATION AND SERVICE REPAIR WORK MUST BE CARRIED
OUT BY QUALIFIED PERSONS ONLY.
E31 Convection Oven
Revision 3/F3505
-2-
© Moffat Ltd, April 2005
CONTENTS
This manual is designed to take a more in depth look at the E31 convection oven for the purpose of
making the unit more understandable to service people.
There are settings explained in this manual that should never require to be adjusted, but for
completeness and those special cases where these settings are required to change, this manual
gives a full explanation as to how, and what effects will result.
SECTION
PAGE NO.
1.
SPECIFICATIONS......................................................................................................... 5
2.
INSTALLATION ............................................................................................................ 7
3.
OPERATION .................................................................................................................. 9
3.1
3.2
4.
Description of Controls
Explanation of Control System
MAINTENANCE............................................................................................................. 12
4.1
4.2
Cleaning
Routine Procedures
5.
TROUBLE SHOOTING GUIDE ..................................................................................... 14
6.
SERVICE PROCEDURES ............................................................................................. 17
6.1
6.2
6.3
6.4
Fault Diagnosis
Access
Replacement
Adjustment / Calibration
7.
ELECTRICAL SCHEMATICS........................................................................................ 32
8.
ELECTRICAL WIRING DIAGRAMS ............................................................................. 33
9.
SPARE PARTS.............................................................................................................. 34
10.
ACCESSORIES / OPTIONS.......................................................................................... 35
11.
PARTS DIAGRAM ........................................................................................................ 36
11.1
11.2
12.
Main Assembly
Control Panel Assembly
SERVICE CONTACTS.................................................................................................. 41
APPENDIX A. POWER RELAY UPGRADE KIT ................................................................... 43
IMPORTANT: MAKING ALTERATIONS MAY VOID WARRANTIES AND APPROVALS.
E31 Convection Oven
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© Moffat Ltd, April 2005
E31 Convection Oven
Revision 3/F3505
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© Moffat Ltd, April 2005
1. SPECIFICATIONS
MODEL: E31
(23.60)
(28.35)
(23.10)
(6.30)
(1.85)
(1.55)
(4.70)
SIDE
FRONT
PLAN
LEGEND
- Electrical connection entry point
- Water entry - 9mm / 3/8” I.D male hose connection
Dimensions shown in millimetres.
Dimensions in inches shown in brackets.
E31 Convection Oven
Revision 3/F3505
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© Moffat Ltd, April 2005
LOCATION
To ensure correct ventilation for the motor and
controls the following minimum installation
clearances are to be adhered to:
Top
Rear
Left-hand side
Right-hand side
200mm / 8”
25mm / 1”
25mm / 1”
25mm / 1”
OVEN INTERNAL DIMENSIONS
Width
468 mm / 18.5”
Height
418 mm / 16.5”
Depth
432 mm / 17”
Oven Volume 0.08 m³ / 3.0 ft³
OVEN RACK SIZE
Width
460 mm / 18”
Depth:
370 mm / 14.5”
ELECTRICAL SUPPLY
OPTIONS
SPECIFICATION
208 V AC 60 Hz, 14.6 A, 3.2kW @ 208 V
220-240 V AC 60 Hz, 13.0 A, 3.1kW @ 240 V
208-220 V AC 50 Hz, 14.6 A, 3.2kW @ 220 V
230-240 V AC 50 Hz, 13.0 A, 3.1kW @ 240 V
ELECTRICAL PLUG SPECIFICATION
REQUIREMENTS
Australia
3-pin 250V 15A, AS/NZ 3112
Canada
3-pin 250V 15A, NEMA 6-15
New Zealand 3-pin 250V 15A, AS/NZ 3112
United Kingdom 3-pin 250V 13A fused, BS
1363A
United States 3-pin 250V 15A, NEMA 6-15
Other Countries 3-pin 250V 13A minimum,
type to meet country standards
WATER SUPPLY CONNECTION
Max Pressure 550 kPa / 5.5 bar / 80 psi
Min Pressure 100 kPa / 1.0 bar / 15 psi
E31 Convection Oven
Revision 3/F3505
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© Moffat Ltd, April 2005
2. INSTALLATION
WARNING: THIS APPLIANCE MUST BE GROUNDED.
WARNING: ALL INSTALLATION AND SERVICE REPAIR WORK MUST BE CARRIED
OUT BY QUALIFIED PERSONS ONLY.
DOUBLE STACKING UNITS
It is most important that the oven is installed
correctly and that the operation is correct
before use. Installation shall comply with local
electrical, health and safety requirements.
When it is desired to mount one unit on top of
another the 31mm (1¼") high spacer feet
must be used. These short feet should be
screwed on, and the unit lifted on top of the
bottom unit, where it locates safely under its
own weight, for normal applications.
BEFORE CONNECTION TO THE POWER
SUPPLY
Unpack and check unit for damage and report
any damage to the carrier and dealer. Report
any deficiencies to your dealer. Fit the feet
which are packed inside the oven. Fit door
handle to oven door. Check that the available
power supply is correct to that shown on the
rating plate located on the right-hand side
panel (refer figure 2.3).
BEFORE USE
Operate the oven for about 1 hour at 200°C
(400°F) to remove any fumes or odours which
may be present.
ELECTRICAL CONNECTION
E31 convection ovens are supplied with
pre-fitted cords. Ensure unit is fitted with the
correct cord and plug for the installation (refer
specifications section).
208 V AC 60 Hz, 14.6 A, 3.2kW @ 208 V
220-240 V AC 60 Hz, 13.0 A, 3.1kW @ 240 V
208-220 V AC 50 Hz, 14.6 A, 3.2kW @ 220 V
230-240 V AC 50 Hz, 13.0 A, 3.1kW @ 240 V
LOCATION
To ensure correct ventilation for the motor and
controls the following minimum installation
clearances are to be adhered to:
Top
Rear
Left-hand side
Right-hand side
Figure 2.1
200mm / 8”
25mm / 1”
25mm / 1”
25mm / 1”
Should changing of the cord be necessary,
gain access to the electrical connection
terminal block and strain relief by removing
the back panel (four screws).
IMPORTANT:
THE OVEN VENT
LOCATED ON THE CABINET TOP
MUST NEVER BE OBSTRUCTED.
WATER CONNECTION
A cold water supply should be fitted to the
water inlet (9mm / 3/8” hose connection) which
is located on the rear of the left hand side of
the unit.
Position the oven in its allocated working
position. Use a spirit level to ensure the oven
is level from side to side and front to back. (If
this is not carried out, uneven cooking could
occur). The feet/legs used with bench or floor
mounting or provided with stands are
adjustable and will require adjusting in
levelling the unit. It should be positioned so
the operating panel and oven shelves are
easily reachable for loading and unloading.
E31 Convection Oven
Revision 3/F3505
Connect water supply - Max inlet pressure
80psi / 550kPa.
Turn on water supply to check for leaks.
IMPORTANT: MAXIMUM INLET WATER
PRESSURE IS 550 kPa / 80 psi.
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© Moffat Ltd, April 2005
DOOR HANDLE INSTALLATION
1. Open oven door.
2. Remove two screws (item 2).
3. Remove the two screws (item 3) from the
handle (item 1).
4. Install the handle bracket through the slot
on the door side.
5. Screw in the two screws (item 2) fully, then
fully screw in the previous two screws (item
3). Ensure that they are tight.
1
3
2
Figure 2.2
RATING PLATE LOCATION
The rating plate for the E31 convection oven is
located at the bottom left corner of the RH side
panel.
Rating Plate
Figure 2.3
E31 Convection Oven
Revision 3/F3505
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© Moffat Ltd, April 2005
3. OPERATION
NOTE: A full user’s operation manual is supplied with the product and can be used for further
referencing of installation, operation and service.
3.1 DESCRIPTION OF CONTROLS
1. POWER
Depress to switch power on or off (switch
illuminates when power is on).
2. THERMOSTAT
Temperature range 50 - 280°C (120 - 550°F).
Indicator illuminates when elements are
cycling ON to maintain set temperature.
1
GRILL POSITION - The GRILL indicator will
illuminate indicating that the GRILL function
has been set. The HEATING indicator will
also illuminate whenever the elements are on.
2
3. BAKE TIMER
1 Hour bake timer.
(Indicator illuminates when “time up” (0)
reached, and buzzer sounds).
4. ROAST N HOLD
Depress switch to activate ’ROAST N HOLD’
function (Switch illuminates when ON).
3
5. ROAST TIMER
3 Hour roast timer.
(Indicator illuminates when “time up” (0)
reached, and product held at 75°C (167°F).
4
6. STEAM SWITCH
Push switch to activate water injection (Water
injects into oven while the button is
depressed).
5
7. LIGHT SWITCH
Push switch to activate oven light.
(Light illuminates while button depressed).
6
7
E31 Convection Oven
Revision 3/F3505
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© Moffat Ltd, April 2005
3.2
moisture loss during cooking.
EXPLANATION OF CONTROL
SYSTEM
The temperature control of this oven is with a
capillary type thermostat which can be set to a
required cooking temperature, or set to the
Grill/Broil position to provide top browning or
grilling/broiling in the oven.
The E31 Turbofan convection oven features
multi-function operator controls for which a
correct understanding of their operation is
required before carrying out any service or
fault repair work. The control device functions
are explained as follows:
The thermostat switch has a separate switch
body assembled onto the front from the shaft
assembly and when the thermostat is set to a
cooking temperature, one set of contacts is
closed to switch power from the oven
thermostat to the bottom heating element in
the oven. The second switch contact of this
switch assembly remains open in this setting
and isolates power from the top element inner
coil. The top element outer coil is directly
switched on from the oven thermostat.
Accordingly only the top outer element and
the bottom element are used when a cooking
temperature is selected. The control panel
indicator light above the thermostat knob
cycles On and Off with the thermostat to
indicate when the elements are on and the
oven is heating.
A power switch on the control panel isolates
all to the controls of the oven. With the power
switch Off all functions of the oven are
inoperable.
With the power switch On (illuminated) power
is directly supplied to the 60 minute bake
timer, steam (water injection) switch, door
microswitch, light switch, and the temperature
control circuit.
Accordingly the oven
circulation fan will operate when the door is
closed, and with door open the oven light will
come on and the circulation fan will shut
down, as these are controlled via the door
microswitch. The control panel light switch
will turn the oven light on when the door is
closed only when the light switch is held in.
When the thermostat control is set to the Grill
position the first switch contact opens and the
second switch contact closes.
This
arrangement allows power to be provided to
the top element inner coil when the thermostat
is On, and isolates power from going to the
bottom heating element. The top element
outer coil which is directly fed from the oven
thermostat switch is therefore On in
conjunction with the top element inner coil
when the thermostat is set to the Grill position.
As both the top inner and outer element coils
are thermostatically controlled, the elements
will cycle On/Off with the door closed as the
thermostat setting in the Grill position is 300°C
(600°F). If the Grill position is selected with
the door open, the elements will remain On
continuously and the circulation fan will be
turned Off. The control panel Grill indicator
will illuminate when the thermostat is set to
the Grill position and will cycle On and Off
with the main heating indicator light.
The 60 minute timer is a mechanical timer and
can therefore be operated with the oven’s
power switch On or Off. However, only with
the oven’s power switch On will the switch
contacts of the 60 minute timer turn on the
time-up buzzer and illuminate the time-up
indicator on the control panel. The buzzer
and time-up indicator provide indication that
the time setting has run down to zero and at
this point will remain On continuously until the
60 minute timer has been manually set back
to the Off (vertical) position. The 60 minute
timer does not control any other part of the
oven’s operating system as this timer is
independent of the temperature control and
heating system.
The steam (water injection) switch on the
control panel can be operated whenever the
power switch is On. The switch is momentary
like the light switch and when depressed, will
operate the electric solenoid valve at the rear
of the oven and inject water into the water
trough at the bottom of the left hand side rack
in the oven. Releasing the steam button will
close the solenoid valve. This feature is used
to instantaneously add moisture into the oven
cavity, or to introduce a reservoir of water in
the water trough to maintain humidity in the
oven chamber and minimise product’s
E31 Convection Oven
Revision 3/F3505
The E31 Turbofan convection oven features a
Roast-and-Hold system which can be used to
automatically set the oven to a fixed holding
temperature at the end of a timed cooking
period. When the Roast-and-Hold switch is
turned On the switch will illuminate and turn
on a mini-contactor found on the inside of the
control panel. When the contactor is switched
On a normally closed switch pole on the
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© Moffat Ltd, April 2005
contactor is open and the normal power
supply to the oven thermostat is isolated. A
second normally open switch pole is closed
and this provides power to the 3 hour roast
timer.
be used to identify any incorrect oven
operation. On correct identification of the
operating fault the Troubleshooting Guide will
make reference to the corrective action
required, or refer to the Fault Diagnosis
section and/or Service section to assist in
correction of the fault.
If the roast timer is in the Hold (vertical)
position the timer switch contacts will be in
their normally closed position and supply
power directly to the Hold thermostat located
behind the control panel.
The Hold
thermostat is factory set to 75°C (167°F) and
will directly supply power to the bottom
heating element as required to maintain its
preset temperature.
If the main thermostat is turned On, power will
also be supplied to the top outer element coil
through the first switch contact of the
thermostat front switch assembly. In this case
the thermostat heating light will also cycle On/
Off as the Hold thermostat maintains
temperature.
In the Roast-and Hold mode the 3 hour timer
can be set to a selected roasting time. During
this time period the normally open switch
contacts of the timer are closed. The timer
has two change over switches and in this
position one is used to supply power to its
timing motor and the other is used to switch
power directly to the main oven thermostat.
During the 3 hour timer run-down period the
oven temperature will be controlled by the
main oven thermostat to the set temperature
and operate as previously described.
When the 3 hour timer has run down and
reached the Hold position the two switch
contacts change over to their normally closed
position which isolates power from the timer
motor and the oven thermostat.
It also
switches power back to the oven hold
thermostat. At this point the temperature
control is now maintained by the hold
thermostat as previously described.
To
cancel the hold circuit the Roast-and-Hold
switch is turned Off. This turns off the
contactor which removes power from the 3
hour timer and closes the contactor pole on
the contactor that feeds the main oven
thermostat.
The factory preset hold thermostat can be
adjusted as required to change the holding
temperature if necessary.
Refer Service
section for this procedure.
The following Troubleshooting Guide should
E31 Convection Oven
Revision 3/F3505
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© Moffat Ltd, April 2005
4. MAINTENANCE
WARNING: ALL INSTALLATION AND SERVICE REPAIR WORK MUST BE CARRIED
OUT BY QUALIFIED PERSONS ONLY.
4.1 CLEANING
OVEN SEALS
To remove, hold at their centre point and
pull forward until they unclip. Remove side
seals first, then top and bottom. The seals
may be washed in the sink, but take care not
to cut or damage them. To replace, ensure
that the lip is facing the oven opening. Fit
the top and bottom seals first, then the side
seals.
WARNING: ALWAYS TURN THE
POWER SUPPLY OFF BEFORE
CLEANING.
IMPORTANT: THIS UNIT IS NOT
WATER PROOF.
DO NOT USE A WATER JET SPRAY TO
CLEAN INTERIOR OR EXTERIOR OF
THIS UNIT.
OVEN DOOR GLASS
Clean with conventional glass cleaners
EXTERIOR
Clean with a good quality stainless steel
cleaning compound. Harsh abrasive cleaners
may damage the surface.
INTERIOR
Ensure that the oven chamber is cool. Do not
use wire brushes, steel wool or other abrasive
materials. Clean the oven regularly with a
good quality oven cleaner. Take care not to
damage the fan or the tube at the right side of
the oven which controls the thermostat.
OVEN RACKS
To remove, slide out to the stop position, raise
the front edge up, and lift out.
SIDE RACKS
To remove, take hold of the centre rung and
swing towards the oven top. To replace, hold
horizontally, engage in holes and swing down.
FAN BAFFLE
To remove, unscrew the oven lamp glass and
lift the baffle out. To replace, locate the
bottom edge of the baffle over the bottom
element terminal plate and secure in place
with the oven lamp glass.
IMPORTANT:
DO NOT
TIGHTEN LAMP GLASS.
E31 Convection Oven
Revision 3/F3505
OVER
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© Moffat Ltd, April 2005
4.2 ROUTINE PROCEDURES
PROCEDURE
INTERVAL
DOOR SEALS
Check for deterioration.
12 months
DOOR PIVOT BUSHES
Check for wear.
12 months
DOOR CATCH
Ensure that catch is adjusted such that the door closes 12 months
properly.
ELEMENTS
Check that element resistances are correct to their rating 12 months
(refer 6.3.13)
WATER NOZZLE
Check for liming / scale build-up in water nozzle.
E31 Convection Oven
Revision 3/F3505
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12 months
© Moffat Ltd, April 2005
5. TROUBLE SHOOTING
WARNING: ALL INSTALLATION AND SERVICE REPAIR WORK MUST BE CARRIED
OUT BY QUALIFIED PERSONS ONLY.
FAULT
THE OVEN DOES NOT
OPERATE / START
POSSIBLE CAUSE
REMEDY
The mains isolating switch on
Turn on.
the wall, circuit breaker or fuses
are “off” at the power board.
The power switch on the oven is Depress switch. Switch will
off.
illuminate.
FAN DOESN’T OPERATE
Incorrect electrical supply.
(Refer fault diagnosis 6.1.1)
Ensure electrical supply correct.
Power switch on unit faulty.
(Refer fault diagnosis 6.1.1)
Replace.
(Refer service section 6.3.4)
Door not closed.
(Fan only operates with door
closed).
Close door.
Door microswitch out of
adjustment.
(Refer fault diagnosis 6.1.2)
Adjust.
(Refer service section 6.4.2)
Door microswitch faulty
(Refer fault diagnosis 6.1.2)
Replace.
(Refer service section 6.3.2)
Fan motor faulty.
(Refer fault diagnosis 6.1.2)
Replace.
(Refer service section 6.3.15)
Wiring.
Check and tighten any loose
wiring.
OVEN LIGHT NOT
Blown bulb.
ILLUMINATING - DOOR OPEN
Replace.
(Refer service section 6.3.1)
No power to light.
(Refer fault diagnosis 6.1.3)
OVEN LIGHT NOT
ILLUMINATING - DOOR
CLOSED
NO WATER INJECTION /
STEAM
E31 Convection Oven
Revision 3/F3505
Blown bulb.
Replace.
(Refer service section 6.3.1)
Light switch faulty.
(Refer fault diagnosis 6.1.4)
Replace.
(Refer service section 6.3.4)
Water not turned on.
Turn water on at water supply.
Oven water nozzle blocked.
Remove, clean or replace.
(Refer service section 6.3.13)
Fault with water valve.
(Refer fault diagnosis 6.1.5)
Service or replace as required.
(Refer service section 6.3.11,
6.3.12)
Steam switch faulty.
Replace.
(Refer service section 6.3.4)
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© Moffat Ltd, April 2005
FAULT
CONTINUOUS WATER OUT
OF OVEN WATER NOZZLE
POSSIBLE CAUSE
REMEDY
With oven on only—Electrical
fault.
(Refer fault diagnosis 6.1.6)
Correct electrical fault.
With oven on or off—Fault with
water valve.
Service or replace as required.
(Refer service section 6.3.11,
6.3.10)
60 MINUTE TIMER WILL NOT
TIME DOWN
Timer faulty.
Replace.
(Refer service section 6.3.6)
60 MINUTE TIMER
INACCURATE BELOW 20
MINUTES
Timer not set correctly.
For timer settings below 20
minutes, always rotate past 20
minutes, then back to desired
time.
Zero (time up) position not set
correctly.
(Refer service section 6.4.5
Buzzer faulty.
(Refer fault diagnosis 6.1.7)
Replace.
(Refer service section 6.3.5)
Timer not switching on buzzer.
(Refer fault diagnosis 6.1.7)
Replace.
(Refer service section 6.3.6)
60 MINUTE TIMER NO TIME
UP INDICATOR
Indicator faulty.
(Refer fault diagnosis 6.1.8)
Replace.
(Refer service section 6.3.3)
NO HEAT
No power to thermostat.
(Refer fault diagnosis 6.1.9)
Identify fault and correct.
Thermostat faulty
(Refer fault diagnosis 6.1.9)
Replace.
(Refer service section 6.3.8)
NO TEMPERATURE
CONTROL
Thermostat faulty
(Refer fault diagnosis 6.1.10)
Replace.
(Refer service section 6.3.8)
SLOW RECOVERY
Oven in ‘Roast ‘n Hold’ mode.
Switch off ‘Roast ‘n Hold’.
Overloading of oven.
Reduce oven loading.
Electrical supply incorrect.
Check supply voltage is as per
rating plate voltage.
Fan not working.
Check fan operation.
Thermostat calibration.
(Refer fault diagnosis 6.1.11)
Correct calibration.
(Refer service section 6.4.1)
Element(s) not working.
Correct element fault.
(Refer Fault: Top element,
Fault: Bottom element)
BOTTOM ELEMENT NOT
WORKING
Element faulty (blown).
(Refer fault diagnosis 6.1.12)
Replace.
(Refer service section 6.3.14)
TOP ELEMENT NOT
WORKING (IN BAKE MODE—
NOT GRILL / BROIL MODE)
Element faulty / blown.
(Refer fault diagnosis 6.1.13)
Replace.
(Refer service section 6.3.14)
60 MINUTE TIMER NO TIME
UP BUZZER
E31 Convection Oven
Revision 3/F3505
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© Moffat Ltd, April 2005
FAULT
POSSIBLE CAUSE
REMEDY
NO THERMOSTAT HEATING
INDICATOR
Indicator faulty.
(Refer fault diagnosis 6.1.14)
Replace.
(Refer service section 6.3.3)
GRILL NOT WORKING
Element faulty / blown.
(Refer fault diagnosis 6.1.15)
Replace.
(Refer service section 6.3.14)
GRILL INDICATOR LIGHT NOT Indicator faulty.
WORKING
(Refer fault diagnosis 6.1.16)
Replace.
(Refer service section 6.3.3)
ROAST TIMER (180 MINUTE)
WILL NOT TIME DOWN
Depress switch. Switch will
illuminate.
Roast ’n’ Hold switch not
depressed.
No power to timer / timer faulty. Correct electrical fault / replace
(Refer fault diagnosis 6.1.17) timer.
(Refer service section 6.3.7)
NO HOLD INDICATOR
HOLDING TEMPERATURE
INCORRECT
DOOR DOES NOT CLOSE
‘Roast ‘n Hold’ switch faulty.
(Refer fault diagnosis 6.1.17)
Replace.
(Refer service section 6.3.4)
Faulty indicator.
(Refer fault diagnosis 6.1.18)
Replace.
(Refer service section 6.3.3)
Faulty timer.
(Refer fault diagnosis 6.1.18)
Replace.
(Refer service section 6.3.7)
Hold thermostat set
temperature incorrect
Adjust to correct temperature.
(Refer service section 6.4.4)
Hold thermostat faulty.
(Refer fault diagnosis 6.1.19)
Replace.
(Refer service section 6.3.9)
Tray in way of door.
Correctly position tray in rack.
Door seal obstruction.
Correctly install door seal.
(Refer service section 6.3.20)
Door handle installed
incorrectly.
Fit correctly.
(Refer installation section)
Door ball catch setting incorrect. Adjust.
(Refer service section 6.4.3)
DOOR SEAL LEAKS
Door pivot bushes / pins worn.
Replace.
(Refer service section 6.3.21)
Door seal damaged.
Replace.
(Refer service section 6.3.20)
Door seal incorrectly fitted.
Correctly install door seal.
(Refer service section 6.3.20)
Door ball catch setting incorrect. Adjust.
(Refer service section 6.4.3)
Door pivot bushes / pins worn.
E31 Convection Oven
Revision 3/F3505
-16-
Replace.
(Refer service section 6.3.21)
© Moffat Ltd, April 2005
6. SERVICE PROCEDURES
WARNING: ENSURE POWER SUPPLY IS SWITCHED OFF BEFORE SERVICING.
WARNING: ALL INSTALLATION AND SERVICE REPAIR WORK MUST BE CARRIED
OUT BY QUALIFIED PERSONS ONLY.
SECTION
6.1
FAULT DIAGNOSIS ..............................................................................................................19
6.1.1
6.1.2
6.1.3
6.1.4
6.1.5
6.1.6
6.1.7
6.1.8
6.1.9
6.1.10
6.1.11
6.1.12
6.1.13
6.1.14
6.1.15
6.1.16
6.1.17
6.1.18
6.1.19
6.2
Oven Does Not Operate / Start............................................................................19
Fan Does Not Operate.........................................................................................19
Oven Light Not Illuminating—Door Open ............................................................19
Oven Light Not Illuminating—Door Closed ..........................................................19
No Water Injection / Steam..................................................................................19
Continuous Water Out Of Oven Water Nozzle ....................................................20
60 Minute Timer No Time Up Buzzer ..................................................................20
60 Minute Timer No Time Up Indicator................................................................20
No Heat................................................................................................................20
No Temperature Control ......................................................................................21
Slow Recovery .....................................................................................................21
Bottom Element Not Working ..............................................................................21
Top Element Not Working (In Bake Mode—Not Grill / Broil) ...............................21
No Thermostat Heating Indicator.........................................................................21
Grill Not Working..................................................................................................21
Grill Indicator Not Working...................................................................................22
Roast Timer (180 Minute) Will Not Time Down ...................................................22
No Hold Indicator .................................................................................................22
Holding Temperature Incorrect ............................................................................22
ACCESS ................................................................................................................................23
6.2.1
6.2.2
6.2.3
6.2.4
6.3
PAGE NO.
Control Panel .......................................................................................................23
Service Panel (Rear Panel) .................................................................................23
Baffle ....................................................................................................................23
Control Panel (Rear) ............................................................................................23
REPLACEMENT....................................................................................................................24
6.3.1
6.3.2
6.3.3
6.3.4
6.3.5
6.3.6
6.3.7
6.3.8
6.3.9
6.3.10
6.3.11
6.3.12
6.3.13
6.3.14
Light Bulb / Glass.................................................................................................24
Door Microswitch .................................................................................................24
Indicator Neon Light.............................................................................................24
Power / Roast / Lights / Water Switches..............................................................24
Buzzer ..................................................................................................................24
Bake Timer...........................................................................................................25
Roast Timer..........................................................................................................25
Thermostat ...........................................................................................................25
Hold Thermostat ..................................................................................................26
Mini-Contactor......................................................................................................26
Water Solenoid ....................................................................................................26
Water Solenoid Cleaning .....................................................................................27
Spray Nozzle........................................................................................................27
Elements ..............................................................................................................27
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6.3.15
6.3.16
6.3.17
6.3.18
6.3.19
6.3.20
6.3.21
6.4
Fan .......................................................................................................................27
Motor ....................................................................................................................28
Outer Glass ..........................................................................................................28
Inner Glass...........................................................................................................29
Inner Glass Seal ..................................................................................................29
Door Seals ...........................................................................................................29
Door Pivot Bushes ...............................................................................................29
ADJUSTMENT / CALIBRATION ..........................................................................................30
6.4.1
6.4.2
6.4.3
6.4.4
6.4.5
Thermostat Calibration.........................................................................................30
Door Microswitch Adjustment ..............................................................................31
Door Alignment ....................................................................................................31
Hold Temperature Adjustment .............................................................................31
60 Minute Timer Zero Position Adjustment..........................................................31
E31 Convection Oven
Revision 3/F3505
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© Moffat Ltd, April 2005
6.1 FAULT DIAGNOSIS
Fan motor faulty
6.1.1 OVEN DOES NOT OPERATE / START
Check the supply voltage across motor
terminals. If there is no voltage then check
the electrical connections of supply wiring.
If voltage is correct then check the oven fan
for free rotation. Remove any obstruction.
Incorrect electrical supply
Check that the voltage across phase and
neutral (L1 and L2) terminals of terminal block
is the voltage as stated on the unit’s electrical
rating plate.
If fan is free to spin and the voltage supply is
correct, then the motor is faulty—replace.
If incorrect, check electrical connection of
supply wiring and / or check electrical supply.
6.1.3 OVEN LIGHT NOT ILLUMINATING—
DOOR OPEN
Power switch faulty
No power to light
Check if power switch latches. If the switch
does not latch, then switch is faulty—replace.
Check the supply voltage across lamp
housing terminals at rear of oven. If the
voltage is correct, replace the bulb (if faulty).
If the bulb is OK, check lamp housing.
Replace if faulty.
With switch latched, check voltage across
terminal one to terminal three or four. If there
is no voltage, check for fault in wiring.
Check voltage across terminal two to terminal
three or four. If there is no voltage, then
switch is faulty—replace.
NOTE:
If there is no voltage, open oven door and
manually depress door microswitch actuator
at top right of oven. If this activates the fan,
then the microswitch actuator arm at rear of
oven requires adjustment.
When power switch is latched, it
should illuminate if operating
correctly.
Check voltage across micro-switch terminals
to neutral.
6.1.2 FAN DOESN’T OPERATE
With the door closed there should be power to
the com terminal and the n.o. terminal.
Microswitch out of adjustment
With the door open there should be power to
the com terminal and the n.c. terminal.
Open oven door and manually depress door
microswitch actuator at top right of oven. If
this activates the fan, then the microswitch
actuator arm at rear of oven requires
adjustment.
If not, microswitch is faulty—replace.
6.1.4 OVEN LIGHT NOT ILLUMINATING—
DOOR CLOSED
Microswitch faulty
Check voltage across microswitch terminals to
neutral.
Light switch faulty
Check voltage to the bottom terminal of the
switch. If there is no voltage, then check
wiring.
With the door closed there should be power to
the com terminal and the n.o. terminal.
With the door open there should be power to
the com terminal and the n.c. terminal.
With switch depressed, check voltage at top
terminal. If there is no voltage, then replace
the switch.
If not, microswitch is faulty—replace.
If voltage is correct, then check wiring to light.
Microswitch
NOTE: Alternately, perform a continuity test
across the terminals with the light
switch depressed.
com
6.1.5 NO WATER INJECTION / STEAM
n.c.
n.o.
Fault with water valve
Check voltage supply across the water valve
solenoid coil with the steam switch depressed.
If there is no power supply then check the
control panel steam switch.
Figure 6.1.1
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Check voltage to the bottom terminal of the
switch. If there is no voltage, then check
wiring.
If no voltage at terminal 2 then timer is
faulty—replace.
With switch depressed, check for voltage at
top terminal. If there is no voltage then
replace switch. If voltage correct, check wiring to solenoid coil.
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).
If the power supply to the coil is correct,
disconnect wiring to coil and check the
resistance of the coil windings.
6.1.8 60 MINUTE TIMER NO TIME UP
INDICATOR
Correct coil resistance: 2500 ohms
Indicator faulty
NOTE: If open circuit / high resistance, then
the coil is faulty—replace.
With the timer in the zero position, check for
voltage across the indicator light. If correct,
then the indicator light is faulty—replace.
If coil resistance is correct, rewire and listen
for an audible solenoid click when the steam
switch is depressed.
If there is no voltage then check wiring.
If solenoid can be heard functioning, and oven
water nozzle is not blocked, then remove
water solenoid and fittings and check for
blockages.
6.1.9 NO HEAT
No power to thermostat
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.
6.1.6 CONTINUOUS WATER OUT OF OVEN
WATER NOZZLE
Water solenoid electrical fault
With control panel steam switch not
depressed, check for power supply across
solenoid coil. If there is power to the coil, then
check wiring and steam switch (refer 6.1.5).
Terminal A1
6.1.7 60 MINUTE TIMER NO TIME UP
BUZZER
Terminal 21
Contact
Indicator
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.
Terminal A2
Figure 6.1.3
If indicator is in the ‘1’ position then check the
voltage across contactor coil terminals A1 and
A2.
If there is no voltage, then check wiring.
Buzzer
NOTE: There should be no voltage across
these terminals when ‘Roast ‘n Hold’
is not selected.
Buzzer Terminals
If the indicator is in position ‘1’ with no voltage
across A1 and A2 then the contactor is
faulty—replace.
Figure 6.1.2
Thermostat faulty
Timer not switching on buzzer
Set thermostat to 200°C or 400°F. Check the
voltage out of terminal two on the thermostat.
If there is no voltage then the thermostat is
faulty—replace.
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.
E31 Convection Oven
Revision 3/F3505
Terminal 22
If the voltage is correct and the heating light is
on then check all wiring to elements.
-20-
© Moffat Ltd, April 2005
Thermostat faulty
then check for voltage at terminal P6. If
power to P6 (and none to 6), then the
thermostat is faulty—replace.
With thermostat in off (vertical) position, the
heating indicator should be off. If not then the
thermostat is faulty—replace.
NOTE: Correct bottom element current draw:
208 V :
9.6A ± 5%
220—240V: 8.7A ± 5%
Check that the thermostat phial is in correct
location and check for broken capillary tube—
replace if damaged.
6.1.13 TOP ELEMENT NOT WORKING (IN
BAKE MODE—NOT GRILL / BROIL)
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 temperature overshoots by 50°C and continues,
switch off and replace.
Element faulty / blown
6.1.10 NO TEMPERATURE CONTROL
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.
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.
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%
6.1.14 NO THERMOSTAT HEATING
INDICATOR
NOTE: Thermostat cycling span should be
±15°C or 27°F
Indicator faulty
6.1.12 BOTTOM ELEMENT NOT WORKING
Check the voltage across the indicator
terminals. If the voltage is correct then the
indicator is faulty—replace.
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.
If there is no voltage then check wiring.
6.1.15 GRILL NOT WORKING
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.
Bottom Element
Terminals
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.
Figure 6.1.4
If there is no voltage then check voltage is
being supplied to bottom element from terminal 6 on switch block mounted to the front of
the thermostat (fig 6.4.1). If no voltage at 6
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terminal 1 to terminal 3 or 4. If there is no
voltage then check for fault in wiring.
NOTE: Top inner element current draw:
208 V:
8.7A ± 5%
220—240 V: 7.8A ± 5%
Check voltage across terminal 2 to terminal 3
or 4. If there is no voltage then switch is
faulty—replace.
6.1.16 GRILL INDICATOR NOT WORKING
NOTE: When the switch is latched, it should
illuminate if operating correctly.
Indicator faulty
Check the voltage across the indicator
terminals.
If the voltage is correct then
indicator is faulty—replace.
6.1.18 NO HOLD INDICATOR
If there is no voltage then check wiring.
Indicator faulty
6.1.17 ROAST TIMER (180 MINUTE) WILL
NOT TIME DOWN
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.
No power to timer
Timer faulty
Check the voltage at terminal 3 of timer, with
timer in hold position. If the voltage is correct
then check wiring.
If there is no voltage then check voltage at
terminal 1 of timer. If there is voltage at 1, but
no voltage at terminal 3 with timer in hold
position, then timer switch is faulty—replace.
Check the voltage at terminal 5 on underside
of the 180 minute timer.
Check that one lead of timer motor is
connected to terminal 5 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.
6.1.19 HOLDING TEMPERATURE
INCORRECT
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.
Hold thermostat faulty
With the power switch on and illuminated,
‘Roast ‘n Hold’ switch on and illuminated, and
the roast (180 minute) timer set to hold, check
that the hold indicator is illuminated.
Figure 6.1.5
With a cold oven (ie room temperature) check
that the top outer and bottom oven elements
only are heating. Test the voltage across the
bottom element and top element terminals at
the rear of oven. If the voltage is correct then
refer Fault: Bottom element not working
(trouble shooting section).
If terminal 4 voltage is correct, check mini
contactor behind control panel is latched to
the ‘1’ position. If contactor is in ‘1’ position
then check wiring.
NOTE: If the main thermostat is set to off
(vertical) position and ‘Roast ‘n Hold’
mode is selected, then only the
bottom element will heat.
If contactor is in ‘0’ position when ‘Roast ‘n
Hold’ switch illuminated then check the
voltage across terminals A1 and A2 of mini
contactor (fig 6.1.3). If the voltage is correct
but the contactor in the off (‘0’) position then
the contactor is faulty—replace.
If there is no voltage at the element terminals,
check the voltage at terminal 2 (top) of the
hold thermostat at bottom rear of control panel
(fig 6.3.12). If there is no voltage then check
wiring.
Terminal 4
Terminal 1
Terminal 2
Terminal 5
Terminal 6
Terminal 3
If the voltage is correct, and the thermostat is
adjusted above oven temperature, then check
for output voltage at terminal 1 (bottom). If
there is no voltage and the thermostat will not
switch on then the thermostat is faulty—
replace.
If there is no voltage across A1 and A2 then
check wiring.
‘Roast ‘n Hold’ switch faulty
Check if the switch latches. If the switch does
not latch then the switch is faulty—replace.
If the voltage is correct but the bottom
element is not working then check wiring.
With the switch latched, check voltage across
E31 Convection Oven
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© Moffat Ltd, April 2005
6.2 ACCESS
6.2.3 BAFFLE
1) Remove trays, racks, element cover and
left hand side rack.
6.2.1 CONTROL PANEL
2) Undo lamp cover.
1) Open the oven door. Remove microswitch
button by pulling straight off.
2)
Lamp
Cover
Undo the two screws now visible.
Microswitch
Button
Side
Rack
Two
Screws
Element
Cover
Figure 6.2.4
3) Remove baffle.
Figure 6.2.1
3) Panel is now free to hinge along right
hand side.
When closing the panel
ensure wires and capillary tube are clear
of metal or other terminals.
6.2.4 CONTROL PANEL—REAR
Buzzer
Power Switch
Heating Indicator
Grill / Broil Indicator
Thermostat
Bake Time Up
Indicator
Figure 6.2.2
Bake Timer (60 minute)
6.2.2 SERVICE (REAR) PANEL
Roast‘n Hold Switch
1) Undo the four screws holding the panel.
Mini Contactor
Roast ‘n Hold Time
Up Indicator
Roast Timer (180 minute)
Four
Screws
Steam Switch
Light Switch
Figure 6.2.3
Hold Thermostat
2) Remove panel.
Figure 6.2.5
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© Moffat Ltd, April 2005
6.3 REPLACEMENT
Neon
Wires
6.3.1 LIGHT BULB / GLASS
1) Unscrew lamp cover.
Lamp
Cover
Figure 6.3.3
2) From back push neon through front of
panel rotating clockwise.
3) Push new neon in from front of panel, and
reconnect wires.
6.3.4 POWER / ROAST / LIGHTS / WATER
SWITCHES
Figure 6.3.1
2) Unscrew bulb out of fitting.
1) With control panel open (refer 6.2.1)
remove the wires from the back of the
switch, noting their positions.
3) Screw in replacement bulb.
4) Ensure seal fitted. Screw lamp cover into
holder with baffle fitted (do not over
tighten).
Switch
Wires
6.3.2 DOOR MICROSWITCH
1) Remove service panel (refer 6.2.2).
2) Remove two screws holding microswitch
to bracket.
Figure 6.3.4
2) From back push switch through front of
panel.
Two Screws
3) Push new switch in from front of panel,
and reconnect wires.
6.3.5 BUZZER
1) Remove control panel (refer 6.2.1).
2) Remove two screws
bracket to panel.
Figure 6.3.2
holding
buzzer
Two Screws
3) Transfer wires to new micro-switch and
re-assemble.
4) Adjust microswitch (refer 6.4.2).
6.3.3 INDICATOR NEON LIGHT
1) With control panel open (refer 6.2.1)
remove the wires from the back of the
neon.
Figure 6.3.5
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3) Withdraw and remove two screws holding
buzzer to bracket.
3) Transfer wires to new timer.
4) Withdraw old timer and insert new timer,
securing with screws.
5) Replace knob.
6.3.8 THERMOSTAT
Two
Screws
1) Pull knob off front of thermostat
2) Open control panel (refer 6.2.1) and undo
two screws securing thermostat.
Figure 6.3.6
4) Transfer wires to new buzzer.
Two Screws
5) Reassemble in reverse order.
6.3.6 BAKE TIMER
1) Remove bake timer knob by pulling it
firmly away from control panel.
2) Open control panel (refer 6.2.1) and undo
two screws securing timer.
Figure 6.3.9
3) Transfer wires to new thermostat.
4) Remove service panel (refer 6.2.2) and
from inside of oven loosen two screws
holding thermostat phial bracket.
Two Screws
Two
Screws
Figure 6.3.7
3) Transfer wires to new timer.
4) Withdraw old timer and insert new timer,
securing with screws.
Figure 6.3.10
5) Withdraw old thermostat phial through
rear of oven.
5) Replace knob.
6) Remove fibreglass sleeve from old
thermostat and fit it to replacement
thermostat.
6.3.7 ROAST TIMER
1) Remove roast timer knob by pulling it
firmly away from control panel.
2) Open control panel (refer 6.2.1) and undo
two screws securing timer.
Fibreglass Sleeve
Thermostat Phial
Two Screws
Figure 6.3.11
7) Insert new thermostat.
8) Re-assemble in reverse order.
Figure 6.3.8
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© Moffat Ltd, April 2005
6.3.9 HOLD THERMOSTAT
6.3.11 WATER SOLENOID
1) Open control panel (refer 6.2.1) and undo
two screws securing hold thermostat
bracket.
1) Ensure water supply is turned off.
2) Inside the oven remove the baffle (refer
6.2.3), then unscrew the water injection
nozzle.
Water Injection
Nozzle
Figure 6.3.15
3) With the service panel removed (refer
6.2.2) remove the wires from the solenoid.
Two Screws
4) Disconnect hose fitting.
Figure 6.3.12
2) Transfer wires to new thermostat.
5) Unscrew the three screws holding
solenoid bracket to the rear of unit and
remove valve assembly.
3) Remove service panel (refer 6.2.2) and
from inside of oven loosen the thermostat
phial bracket.
Two
Screws
Figure 6.3.13
Figure 6.3.16
4) Withdraw old thermostat phial through
rear of oven.
Three Screws
6) On suitable work surface, remove brass
piping connections (1/2” spanner) and two
screws (on bracket) and extract solenoid.
5) Insert new thermostat.
6) Re-assemble in reverse order.
6.3.10 MINI-CONTACTOR
Two
Screws
1) Open control panel (refer 6.2.1) and
transfer wires from old mini-contactor to
new contactor.
2) Remove two screws securing old minicontactor to control panel.
Two Screws
Brass
Connections
Figure 6.3.17
7) Secure new solenoid with screws, and
re-assemble. Check that flow direction as
marked on valve is correct (flow into spray
nozzle).
Figure 6.3.14
3) Secure new mini-contactor to control
panel using two screws.
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2) Unscrew the element from inside the
oven.
6.3.12 WATER SOLENOID CLEANING
1) Remove water solenoid (refer 6.3.10).
2) Remove the two screws securing the
bracket to the solenoid.
Top Element
One Screw
Two Screws
Bottom Element
Two Screws
Figure 6.3.21
Figure 6.3.18
3) Pull element carefully to remove.
3) Remove the valve assembly.
4) Replace and re-assemble in reverse
order.
Element Ratings ±5%
208 V
Valve Assembly
Figure 6.3.19
4) Clean the valve assembly, removing all
dirt and grime from the valve seat.
5) Reassemble the valve assembly and
solenoid.
Top Inner Element
24.5 ohms
Top Outer Element
55.3 ohms
Bottom Element
22.5 ohms
220—240V Top Inner Element
29.5 ohms
Top Outer Element
66.5 ohms
Bottom Element
27.3 ohms
6.3.15 FAN
1) With service panel and baffle removed
(refer 6.2.2 and 6.2.3) undo the centre
nut.
6.3.13 SPRAY NOZZLE
1) Inside the oven remove the LH side rack
and baffle (refer 6.2.3), then unscrew the
water injection nozzle.
NOTE:
loosen.
LH thread - Turn clockwise to
Water Injection
Nozzle
Centre Nut
Figure 6.3.20
Figure 6.3.22
2) Clean or replace as required, ensuring
debris free on re-assembly.
2) Replace and re-assemble in reverse
order.
6.3.14 ELEMENTS
1) With service panel and baffle removed
(refer 6.2.2 and 6.2.3) remove the wires
from the element(s).
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3) Remove LH screw whilst supporting the
door. Lift bracket and remove door from
oven.
6.3.16 MOTOR
1) Remove fan (refer 6.3.14) and then
remove the wires that go to the motor.
2) Undo the four screws holding the motor
bracket in place (from the outside) and
remove motor assembly.
Screws (4)
LH Screw
60 Hz
Terminal
Neutral
Figure 6.3.26
50 Hz
Terminal
Earth /
Ground
4) Remove screws securing door handle.
Figure 6.3.23
Screws
3) Remove three screws holding motor to
bracket and remove motor.
Figure 6.3.27
Three Screws
5) Remove two screws in top trim and two
screws in bottom trim of door, and remove
trim panels.
Figure 6.3.24
Two
Screws
4) Replace and re-assemble in reverse
order.
5) Ensure wire connections are correct to the
voltage supply—60 Hz / 50 Hz (fig 6.3.23)
6.3.17 OUTER GLASS
Two Screws
1) Open door
Figure 6.3.28
2) Undo two screws securing Turbofan cover
plate to oven, and remove cover plate.
6) Lift outer glass away from door.
7) To replace, ensure that the two silicone
rubber seals are in place on the left hand
and right hand side of the door frame.
Clean the inside of the glass and refit it,
ensuring that the silicone rubber seals
cover the outer edges of the glass. Refit
the bottom trim.
2 Screws
Figure 6.3.25
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6.3.18 INNER GLASS
6.3.21 DOOR PIVOT BUSHES
1) Remove the outer glass as above.
Uncrimp the retaining lugs of the window
spacer and remove the spacer and glass.
1) Remove door as per steps one to three of
section 6.3.16.
2) Door bushes can now be removed and
replaced.
3) Reinstall door by reversing steps one to
three of section 6.3.16.
Retaining
Lugs
Door Pivot
Bush
Figure 6.3.29
2) To replace, ensure the silicone rubber
seal has not been displaced. Clean the
glass and refit it. Place the window
spacer in position and crimp the retaining
lugs over to hold the glass in place. Refit
outer glass as above.
Figure 6.3.31
6.3.19 INNER GLASS SEAL
1) Remove the door inner glass (refer
6.3.18).
2) The inner glass seal can now be removed
and replaced.
NOTE: When fitting new seal, ensure join is
at top of door.
6.3.20 DOOR SEALS
1) Open oven door.
2) To remove, hold at their centre point and
pull forward until they unclip
Door Seals
Figure 6.3.30
3) Refit new seals.
Note: Fit top and bottom seals first, with the
open side of the seal facing downwards.
Fit side seals with open side facing outwards.
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© Moffat Ltd, April 2005
Thermostat
6.4 ADJUSTMENT / CALIBRATION
6.4.1 THERMOSTAT CALIBRATION
IMPORTANT:
IF THE OVEN
TEMPERATURE
NEEDS
TO
BE
INCREASED, ENSURE THAT THE
THERMOSTAT IS IN THE ‘OFF’ POSITION
BEFORE CARRYING OUT ADJUSTMENT.
IF OVEN TEMPERATURE NEEDS TO BE
DECREASED, ENSURE THERMOSTAT IS
IN THE ‘MAX’ TEMPERATURE POSITION
BEFORE
CARRYING
OUT
ANY
ADJUSTMENT.
Figure 6.4.3
5) Carefully remove two screws holding Grill/
Broil switch to thermostat.
HINT: Tape Grill/Broil switch assembly
together before removal to prevent it from
springing apart.
Calibration Nut
Screws
Thermostat Shaft
Grill/Broil Switch
Grill/Broil
Switch
Figure 6.4.4
7) Adjust the calibration nut located at the
base of the thermostat shaft.
To increase oven temperature, turn
calibration nut anticlockwise.
To decrease oven temperature, turn
calibration nut clockwise.
Adjustment of the calibration nut by 1°
angular will alter oven temperature by
approximately 2°C (3.6°F).
Thermostat
Figure 6.4.1
1) Turn off power.
2) Remove thermostat knob by pulling it
firmly away from control panel.
Calibration Nut
3) Open control panel (refer 6.2.1). Remove
two screws on control panel holding
thermostat.
Screws
Figure 6.4.5
Figure 6.4.2
8) Reassemble Grill/Broil switch onto the
thermostat and fit assembly back onto
control panel.
4) The thermostat can now be removed.
9) Turn on power and
thermostat calibration.
recheck
oven
10) Repeat procedure if necessary.
E31 Convection Oven
Revision 3/F3505
-30-
© Moffat Ltd, April 2005
6.4.2 DOOR MICROSWITCH ADJUSTMENT
6.4.4 HOLD TEMPERATURE ADJUSTMENT
1) Open oven door.
1) The hold temperature of the oven can be
adjusted by turning the hold thermostat
dial to the desired hold temperature. This
dial is located inside the control panel.
2) Remove service panel (refer 6.2.2).
3) With fingers, bend actuator arm of
microswitch so that switch operates when
door is in closed position.
Actuator Arm
Hold Thermostat
Dial
Figure 6.4.9
Figure 6.4.6
6.4.5 60 MINUTE TIMER ZERO POSITION
ADJUSTMENT
6.4.3 DOOR ALIGNMENT
1) Alignment of the door can be achieved by
loosening the two hex head bolts securing
the bottom plate to the oven body. The
plate may now be moved sideways or in /
out to achieve correct door alignment.
(Door should be parallel to bottom plate
and touching oven seal evenly). When
correct tighten bolts.
1) Remove 60 minute timer knob by pulling it
firmly away from control panel.
2) Open control panel (refer 6.2.1). Loosen
two screws on control panel holding 60
minute timer.
Two Screws
Figure 6.4.10
3) The timer can now be rotated as required
to ensure that the buzzer sounds at the
zero position.
Two Hex Head Bolts
Figure 6.4.7
2) To adjust the door catch, loosen locknut
and turn the slot (using the tool supplied
with the unit); anticlockwise to increase
roller height, clockwise to decrease roller
height.
Adjustment
Tool
Locknut
Figure 6.4.8
E31 Convection Oven
Revision 3/F3505
-31-
© Moffat Ltd, April 2005
7. ELECTRICAL CIRCUIT SCHEMATIC
E31 Convection Oven
Revision 3/F3505
-32-
© Moffat Ltd, April 2005
8. ELECTRICAL WIRING DIAGRAM
E31 Convection Oven
Revision 3/F3505
-33-
© Moffat Ltd, April 2005
9. SPARE PARTS
PART NO
DESCRIPTION
CONTROLS
021473
017121
020823
020849
011760
011794
021476
011419
021472
021474
022281
018223
002990
003002
003434
013521
Switch - Power
Thermostat
Knob - Thermostat / Bake Timer
Neon Indicator
Bake Timer
Buzzer
Switch - ‘Roast n Hold’
‘Roast n Hold’ Timer
‘Roast n Hold’ Timer Knob
Switch - Steam / Light
Relay
Hold Thermostat
Microswitch
Oven Lamp Glass
Silk Gasket
Oven Lamp - 40W Min. Edison Screw
MOTOR & ELEMENTS
003113
Oven Top Element 208 Volts
003114
Oven Bottom Element 208 Volts
011604
Oven Top Element 240 Volts
003074
Oven Bottom Element 240 Volts
013431K
Fan Motor
013432
Oven Fan
STEAM SYSTEM
012781
Water Solenoid
DOOR
014225
014226
021469
021468
021465
021444
002340
011005
013610
Oven Door Seal Strip Side
Oven Door Seal Strip Top / Bottom
Handle Assembly
Handle
Handle Bracket
Door Outer Glass
Door Inner Glass
Door Catch
Door Bush
RACKS
003382
012809
Oven Side Rack
Oven Rack
E31 Convection Oven
Revision 3/F3505
-34-
© Moffat Ltd, April 2005
10. ACCESSORIES
100 MM (FOUR INCH) FOOT OPTION
(PART NO 13048)
OVEN RACKS (PART NO 12809)
25 MM (ONE INCH) FOOT OPTION (PART
NO 13908)
SCONE TRAYS (PART NO 02083)
A25 STAINLESS STEEL STAND
E31 Convection Oven
Revision 3/F3505
-35-
© Moffat Ltd, April 2005
11. PARTS DIAGRAMS
11.1 MAIN ASSEMBLY
E31 Convection Oven
Revision 3/F3505
-36-
© Moffat Ltd, April 2005
Pos
Part No.
Description
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
021533
090406
013011
013012
011412
011389
002990
003012
011414
003016
013431K
012782
011634
012781
019208
012784
012785
011404
013586
002138
002441
018251
013053
013048
013908
004594
017770
004004
011413
011407
013520
003434
013521
003002
013432
004005
004595
003123
003113
011604
003074
003114
003219
002083
012809
003382
012798
012787
003057
014225
003028
014226
003038
004731
011422
021528
004006
WRAPPER
INSULATION
COVER PANEL
COVER PANEL PLATE
MICROSWITCH BRACKET
MICROSWITCH INSULATOR
MICROSWITCH
ACTUATOR ROD
VENT TUBE
MOTOR MOUNTING PLATE
MOTOR
HOSE CONNECTOR
ELBOW
SOLENOID VALVE
SOLENOID MOUNTING BRACKET
SOLENOID EXTENSION
INJECTOR
L.H OVEN SUPPORT
TERMINAL BLOCK
CABLE CLAMP
INSULATOR
CABLE ENTRY CLAMP BRACKET
BODY
LEG - 4" (100 mm)
FOOT ASSEMBLY - 1" (25 mm)
COUNTERWEIGHT (UK ONLY)
PHIAL GUARD
OVEN INNER
R.H OVEN SUPPORT
SIDE INSULATION PANEL
OVEN LIGHT ASSEMBLY
SILK GASKET
LAMP 40W
LIGHT GLASS
FAN
FAN BAFFLE (ALL MARKETS EXCEPT UK)
FAN BAFFLE (UK ONLY)
BAFFLE BRACKET
TOP ELEMENT 208 - 220V
TOP ELEMENT 230 - 240V
BOTTOM ELEMENT 230 - 240V
BOTTOM ELEMENT 208 - 220V
ELEMENT SUPPORT
SCONE TRAY (UK ONLY)
OVEN RACK
OVEN SIDE RACK (ALL MARKETS EXCEPT USA/CANADA )
OVEN SIDE RACK (USA/CANADA ONLY)
WATER TROUGH
BOTTOM ELEMENT GUARD
OVEN SEAL ASSEMBLY - VERTICAL
VERTICAL SEAL - 455mm
OVEN SEAL ASSEMBLY - HORIZONTAL
HORIZONTAL SEAL - 508mm
PIVOT COVER - TOP
PIVOT SUPPORT - TOP ASSEMBLY
TOP TRIM
DOOR INNER
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
E31 Convection Oven
Revision 3/F3505
-37-
© Moffat Ltd, April 2005
48
49
50
51
52
53
54
55
56
021465
021468
---------021530
013610
011424
002340
090200
004452
021444
090225
E31 Convection Oven
Revision 3/F3505
HANDLE BRACKET (HANDLE ASSEMBLY 021469)
HANDLE (HANDLE ASSEMBLY 021469)
CONTROL ASSEMBLY (SEE SECTION 1.2.1)
BOTTOM TRIM
DOOR BUSH (ALSO USED ON CONTROL PANEL PIVOT)
PIVOT SUPPORT - BOTTOM ASSEMBLY
DOOR INNER GLASS
SILICON EXTRUSION - 1.74M
DOOR GLASS CLAMP ANGLE
DOOR OUTER GLASS
SILICON EXTRUSION - 0.96M
-38-
© Moffat Ltd, April 2005
11.2 CONTROL PANEL ASSEMBLY
E31 Convection Oven
Revision 3/F3505
-39-
© Moffat Ltd, April 2005
Pos
Part No.
Description
1
2
3
4
5
6
018224
018223
021538
017121
011760
011419
011983
022281
022282
HOLD THERMOSTAT KNOB
HOLD THERMOSTAT
HOLD THERMOSTAT BRACKET (AFFIX 018209 LABEL)
THERMOSTAT 50-300 ºC
TIMER - 1 Hr
TIMER - 3 Hr (240V 50 Hz)
TIMER - 3 Hr (240V 60 Hz)
CONTACTOR
CONTACTOR KIT (REPLACES 22199 & 21491 RELAYS) (PRE S/N
42473)
CONTACTOR BRACKET
BALL CATCH PLATE
BALL CATCH & LOCKNUT
TIMER MOUNTING PANEL
BUZZER
BUZZER MOUNTING BRACKET
CONTROL PANEL BAKBAR °C
CONTROL PANEL BLUE SEAL °C
CONTROL PANEL MOFFAT °F
DOOR BUSH
LIGHT / STEAM SWITCH
THERMOSTAT / TIMER KNOBS
PILOT LIGHT
ROAST ‘N’ HOLD SWITCH
POWER SWITCH
7
8
9
10
11
12
13
14
15
16
17
18
19
20
021536
018789
011005
021442
011794
021537
004722
004803
004729
013610
021474
020823
020849
021476
021473
E31 Convection Oven
Revision 3/F3505
-40-
© Moffat Ltd, April 2005
11. SERVICE CONTACTS
AUSTRALIA
VICTORIA
HEAD OFFICE AND MAIN WAREHOUSE
740 Springvale Road
Mulgrave VIC 3170
Spare Parts Department
NEW SOUTH WALES
Unit 8/142 James Ruse Drive
Rosehill NSW 2142
Spare Parts
Tel (03) 9518 3888
Fax (03) 9518 3838
Free Call 1800 337 963
Fax (03) 9518 3895
Free Call 1800 337 963
Fax (03) 9518 3895
QUEENSLAND
30 Prosperity Place
Geebung QLD 4034
Spare Parts
Free Call 1800 337 963
Fax (03) 9518 3895
SOUTH AUSTRALIA
Suite 8/71 Fullarton Rd
Kent Town SA 5067
Spare Parts
Tel (08) 8431 0522
Free Call 1800 337 963
WESTERN AUSTRALIA
PO Box 689
Joondalup Business Centre WA 6027
Spare Parts
Tel (08) 9305 8855
Free Call 1800 337 963
NATIONAL COVERAGE FOR 24 HOUR SERVICE OR MAINTENANCE DIAL
FREE CALL 1800 622 216 (AUSTRALIA ONLY)
CANADA
Lessard Agencies Limited
PO Box 97
Stn “D”
Toronto, ONT M6P 3J5
Tel (416) 766 2764
Fax (416) 760 0394
Free Call 1 888 537 7273
NEW ZEALAND
CHRISTCHURCH
16 Osborne St
PO Box 10-001
Christchurch
Spare Parts
Free Call 0800 Moffat
(0800 663 328)
Tel (03) 389 1007
Fax (03) 389 1276
AUCKLAND
4 Waipuna Road
Mt Wellington
Auckland
Spare Parts
E31 Convection Oven
Revision 3/F3505
Tel (09) 574 3150
Fax (09) 574 3159
Free Call 0800 Moffat
(0800 663 328)
-41-
© Moffat Ltd, April 2005
UNITED KINGDOM
BLUESEAL LTD
Units 6-7 Mount St
Business Park
Birmingham B7 5QU
England
Tel 0121-327 5575
Fax 0121-327 9711
UNITED STATES OF AMERICA
MOFFAT INC.
3765 Champion Blvd
Winston-Salem
NC27115
Tel 1-800-551 8795
Fax 336 661 9546
NATIONAL COVERAGE FOR SERVICE OR MAINTENANCE DIAL
FREE CALL 1800 551 8795 (USA ONLY)
E31 Convection Oven
Revision 3/F3505
-42-
© Moffat Ltd, April 2005
APPENDIX A. POWER RELAY UPGRADE KIT
Kit Includes
1
x
2
x
1
x
1
x
1
x
1
x
Power relay
Screw - 8 x 3/8 truss
160mm black wire
180mm red wire
950mm red wire
1050 red wire
Assembly Instructions:
(THE ELECTRICAL SUPPLY MUST BE DISCONNECTED)
1)
Remove the rear service panel.
2)
Mark and drill 2x ø3.5mm holes as per
figure A.1.
3)
Mount relay to holes with 2 screws
provided.
(NOTE: Terminals on relay must face
upwards).
4)
Connect 160mm black wire to vacant
neutral (L2) terminal on terminal block and
to terminal B on relay.
5)
Connect short (180mm) red wire to vacant
phase (L1) terminal on terminal block and
to terminal 7 on relay.
6)
Connect long thick red wire (950mm) to
power relay terminal 4 and remaining long
thin wire (1050mm) to relay terminal A.
Feed these wires through the plastic bush
in the rear of the oven and into the control
cavity.
7)
Loosen screws and open the control panel.
8)
Units with mini-contactor:
Remove and discard wire from terminal 2
on the power switch to terminal 21 on the
mini contactor inside the control panel.
64
85
185
Figure A.1
Power switch
Locate end of thick red wire previously fed
into control cavity and connect to terminal
21 of the contactor.
Units with ‘Schrack’ relay:
Remove and discard wire from terminal 2
on the power switch to terminal 7 on the
‘Schrack’ relay inside the control panel.
Mini-contactor
Locate end of thick red wire previously fed
into control cavity and connect to terminal 7
of the ‘Schrack’ relay.
9)
Locate long thin red wire and connect to
terminal 2 on the power switch.
10)
Close and fasten control panel taking care
not to trap any wires.
11)
Replace and fasten rear service panel.
E31 Convection Oven
Revision 3/F3505
-43-
Figure A.2
© Moffat Ltd, April 2005
Units fitted with mini-contactor:
Units fitted with ‘Schrack’ relay:
51
52
19
22
40
40
20
47
46
1
23
E
N
39
TOP
ELEMENT
FAN MOTOR
E
WATER
SOLENOID
BOTTOM
ELEMENT
P
7
4
1
B
9
6
3
POWER RELAY
45
50Hz
9
A
53
36
4
60Hz
3
38
50
47
48
48
41
7
10
45
37
44
53 51
36
9
37
6
COM
Ø
NO
NC
32
31
28
MAINS
TERMINAL BLOCK
1
29
21
2
T/STAT
1
14
23
P5
12
1hr TIMER
6
2
2
1
3
3
24
3
11
2
1
5
3hr TIMER
2
26
WATER
4
1
13
4
5
P6
42
7
20
27
22
E
44
GRILL
HEAT
33
N
8
MICROSWITCH
5
6
8
4
LIGHTS
25
2
43
1
17
12
6
25 TIME
UP
34
BUZZER
24
33
14
50
11
4
3
2
1
15
52
1
2
31
A
7
4
1
B
9
6
3
17
3
13
POWER
35
ROAST
4
4
3
2
1
29 15
HOLD
LIGHT
18
19
HOLD
T/STAT
49
SCHRACK RELAY
35
30
E31 Convection Oven
Revision 3/F3505
-44-
© Moffat Ltd, April 2005