Moffat E31 Operators Manual

E31 CONVECTION OVEN

SERVICE

MANUAL

E31 convection oven (Applies to units from S/N 40423)

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© Moffat Ltd, January 2009

WARNING: ALL INSTALLATION AND SERVICE REPAIR WORK MUST BE CARRIED
OUT BY QUALIFIED PERSONS ONLY.

E31 convection oven (Applies to units from S/N 40423)

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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 Description of Controls

3.2 Explanation of Control System

4. MAINTENANCE............................................................................................................. 12

4.1 Cleaning

4.2 Routine Procedures

5. TROUBLE SHOOTING GUIDE ..................................................................................... 14

6. SERVICE PROCEDURES ............................................................................................. 17

6.1 Fault Diagnosis

6.2 Access

6.3 Replacement

6.4 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 Main Assembly

11.2 Control Panel Assembly

12. SERVICE CONTACTS.................................................................................................. 41

APPENDIX A. POWER RELAY UPGRADE KIT ................................................................... 43

IMPORTANT: MAKING ALTERATIONS MAY VOID WARRANTIES AND APPROVALS.

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MODEL: E31

1. SPECIFICATIONS

(1.55)

FRONT

(28.35)

(4.70)

(23.60)

(23.10)

(6.30)

(1.85)

SIDE

PLAN

LEGEND

- Electrical connection entry point

- Water entry - 9mm /

Dimensions shown in millimetres.
Dimensions in inches shown in brackets.

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/8” I.D male hose connection

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LOCATION

To ensure correct ventilation for the motor and
controls the following minimum installation
clearances are to be adhered to:

Top 200mm / 8”
Rear 25mm / 1”
Left-hand side 25mm / 1”
Right-hand side 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 SPECIFICATION
OPTIONS

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 stan-

dards

WATER SUPPLY CONNECTION
Max Pressure 550 kPa / 5.5 bar / 80 psi
Min Pressure 100 kPa / 1.0 bar / 15 psi

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2. INSTALLATION

WARNING: THIS APPLIANCE MUST BE GROUNDED.

WARNING: ALL INSTALLATION AND SERVICE REPAIR WORK MUST BE CARRIED
OUT BY QUALIFIED PERSONS ONLY.

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.

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).

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 200mm / 8”
Rear 25mm / 1”
Left-hand side 25mm / 1”
Right-hand side 25mm / 1”

IMPORTANT: THE OVEN VENT

LOCATED ON THE CABINET TOP
MUST NEVER BE OBSTRUCTED.

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.

DOUBLE STACKING UNITS

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 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).

Figure 2.1

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).

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.

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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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

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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

2

3

4

5

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.

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.

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).

5. ROAST TIMER

3 Hour roast timer.
(Indicator illuminates when “time up” (0)
reached, and product held at 75°C (167°F).

6. STEAM SWITCH

Push switch to activate water injection (Water
injects into oven while the button is
depressed).

7. LIGHT SWITCH

Push switch to activate oven light.
(Light illuminates while button depressed).

6

7

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3.2 EXPLANATION OF CONTROL

SYSTEM

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:

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.

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

moisture loss during cooking.

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 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.

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 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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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.

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

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.

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4. MAINTENANCE

WARNING: ALL INSTALLATION AND SERVICE REPAIR WORK MUST BE CARRIED
OUT BY QUALIFIED PERSONS ONLY.

4.1 CLEANING

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.

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 OVER
TIGHTEN LAMP GLASS.

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.

OVEN DOOR GLASS

Clean with conventional glass cleaners

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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. 12 months

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5. TROUBLE SHOOTING

WARNING: ALL INSTALLATION AND SERVICE REPAIR WORK MUST BE CARRIED
OUT BY QUALIFIED PERSONS ONLY.

FAULT POSSIBLE CAUSE REMEDY

THE OVEN DOES NOT
OPERATE / START

FAN DOESN’T OPERATE Door not closed.

The mains isolating switch on
the wall, circuit breaker or fuses
are “off” at the power board.

The power switch on the oven is
off.

Incorrect electrical supply.

(Refer fault diagnosis 6.1.1)

Power switch on unit faulty.

(Refer fault diagnosis 6.1.1)

(Fan only operates with door
closed).

Door microswitch out of
adjustment.

(Refer fault diagnosis 6.1.2)

Door microswitch faulty

(Refer fault diagnosis 6.1.2)

Fan motor faulty.

(Refer fault diagnosis 6.1.2)

Wiring.

Turn on.

Depress switch. Switch will
illuminate.

Ensure electrical supply correct.

Replace.

(Refer service section 6.3.4)

Close door.

Adjust.

(Refer service section 6.4.2)

Replace.

(Refer service section 6.3.2)

Replace.

(Refer service section 6.3.15)

Check and tighten any loose
wiring.

OVEN LIGHT NOT
ILLUMINATING - DOOR OPEN

OVEN LIGHT NOT
ILLUMINATING - DOOR
CLOSED

NO WATER INJECTION /
STEAM

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Blown bulb.

No power to light.

(Refer fault diagnosis 6.1.3)

Blown bulb.

Light switch faulty.

(Refer fault diagnosis 6.1.4)

Water not turned on.

Oven water nozzle blocked.

Fault with water valve.

(Refer fault diagnosis 6.1.5)

Steam switch faulty.

-14-

Replace.

(Refer service section 6.3.1)

Replace.

(Refer service section 6.3.1)

Replace.

(Refer service section 6.3.4)

Turn water on at water supply.

Remove, clean or replace.
(Refer service section 6.3.13)

Service or replace as required.

(Refer service section 6.3.11,

6.3.12)

Replace.

(Refer service section 6.3.4)

© Moffat Ltd, January 2009

FAULT POSSIBLE CAUSE REMEDY

CONTINUOUS WATER OUT
OF OVEN WATER NOZZLE

60 MINUTE TIMER WILL NOT
TIME DOWN

60 MINUTE TIMER
INACCURATE BELOW 20
MINUTES

60 MINUTE TIMER NO TIME
UP BUZZER

60 MINUTE TIMER NO TIME
UP INDICATOR

With oven on only—Electrical
fault.

(Refer fault diagnosis 6.1.6)

With oven on or off—Fault with
water valve.

Timer faulty.

Timer not set correctly.

Zero (time up) position not set
correctly.

Buzzer faulty.

(Refer fault diagnosis 6.1.7)

Timer not switching on buzzer.

(Refer fault diagnosis 6.1.7)

Indicator faulty.

(Refer fault diagnosis 6.1.8)

Correct electrical fault.

Service or replace as required.

(Refer service section 6.3.11,

6.3.10)

Replace.

(Refer service section 6.3.6)

For timer settings below 20
minutes, always rotate past 20
minutes, then back to desired
time.

(Refer service section 6.4.5

Replace.

(Refer service section 6.3.5)

Replace.

(Refer service section 6.3.6)

Replace.

(Refer service section 6.3.3)

NO HEAT No power to thermostat.

(Refer fault diagnosis 6.1.9)

Thermostat faulty
(Refer fault diagnosis 6.1.9)

NO TEMPERATURE
CONTROL

Thermostat faulty
(Refer fault diagnosis 6.1.10)

SLOW RECOVERY Oven in ‘Roast ‘n Hold’ mode.

Overloading of oven.

Electrical supply incorrect.

Fan not working.

Thermostat calibration.

(Refer fault diagnosis 6.1.11)

Element(s) not working.

BOTTOM ELEMENT NOT
WORKING

TOP ELEMENT NOT
WORKING (IN BAKE MODE—

Element faulty (blown).

(Refer fault diagnosis 6.1.12)

Element faulty / blown.

(Refer fault diagnosis 6.1.13)

NOT GRILL / BROIL MODE)

Identify fault and correct.

Replace.

(Refer service section 6.3.8)

Replace.
(Refer service section 6.3.8)

Switch off ‘Roast ‘n Hold’.

Reduce oven loading.

Check supply voltage is as per
rating plate voltage.

Check fan operation.

Correct calibration.
(Refer service section 6.4.1)

Correct element fault.

(Refer Fault: Top element,
Fault: Bottom element)

Replace.

(Refer service section 6.3.14)

Replace.
(Refer service section 6.3.14)

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FAULT POSSIBLE CAUSE REMEDY

NO THERMOSTAT HEATING
INDICATOR

GRILL NOT WORKING

GRILL INDICATOR LIGHT NOT
WORKING

ROAST TIMER (180 MINUTE)
WILL NOT TIME DOWN

NO HOLD INDICATOR

HOLDING TEMPERATURE
INCORRECT

Indicator faulty.

(Refer fault diagnosis 6.1.14)

Element faulty / blown.

(Refer fault diagnosis 6.1.15)

Indicator faulty.

(Refer fault diagnosis 6.1.16)

Roast ’n’ Hold switch not
depressed.

No power to timer / timer faulty.
(Refer fault diagnosis 6.1.17)

‘Roast ‘n Hold’ switch faulty.
(Refer fault diagnosis 6.1.17)

Faulty indicator.
(Refer fault diagnosis 6.1.18)

Faulty timer.
(Refer fault diagnosis 6.1.18)

Hold thermostat set
temperature incorrect

Hold thermostat faulty.
(Refer fault diagnosis 6.1.19)

Replace.

(Refer service section 6.3.3)

Replace.

(Refer service section 6.3.14)

Replace.

(Refer service section 6.3.3)

Depress switch. Switch will
illuminate.

Correct electrical fault / replace
timer.
(Refer service section 6.3.7)

Replace.
(Refer service section 6.3.4)

Replace.

(Refer service section 6.3.3)

Replace.
(Refer service section 6.3.7)

Adjust to correct temperature.
(Refer service section 6.4.4)

Replace.
(Refer service section 6.3.9)

DOOR DOES NOT CLOSE Tray in way of door.

Door seal obstruction.

Door handle installed
incorrectly.

Door ball catch setting incorrect.

Door pivot bushes / pins worn.

DOOR SEAL LEAKS Door seal damaged.

Door seal incorrectly fitted.

Door ball catch setting incorrect.

Door pivot bushes / pins worn.

Correctly position tray in rack.

Correctly install door seal.

(Refer service section 6.3.20)

Fit correctly.
(Refer installation section)

Adjust.

(Refer service section 6.4.3)

Replace.
(Refer service section 6.3.21)

Replace.
(Refer service section 6.3.20)

Correctly install door seal.

(Refer service section 6.3.20)

Adjust.

(Refer service section 6.4.3)

Replace.
(Refer service section 6.3.21)

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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 PAGE NO.

6.1 FAULT DIAGNOSIS ..............................................................................................................19

6.1.1 Oven Does Not Operate / Start............................................................................19

6.1.2 Fan Does Not Operate.........................................................................................19

6.1.3 Oven Light Not Illuminating—Door Open ............................................................19

6.1.4 Oven Light Not Illuminating—Door Closed..........................................................19

6.1.5 No Water Injection / Steam..................................................................................19

6.1.6 Continuous Water Out Of Oven Water Nozzle ....................................................20

6.1.7 60 Minute Timer No Time Up Buzzer ..................................................................20

6.1.8 60 Minute Timer No Time Up Indicator................................................................20

6.1.9 No Heat................................................................................................................20

6.1.10 No Temperature Control......................................................................................21

6.1.11 Slow Recovery.....................................................................................................21

6.1.12 Bottom Element Not Working ..............................................................................21

6.1.13 Top Element Not Working (In Bake Mode—Not Grill / Broil)...............................21

6.1.14 No Thermostat Heating Indicator.........................................................................21

6.1.15 Grill Not Working..................................................................................................21

6.1.16 Grill Indicator Not Working...................................................................................22

6.1.17 Roast Timer (180 Minute) Will Not Time Down ...................................................22

6.1.18 No Hold Indicator .................................................................................................22

6.1.19 Holding Temperature Incorrect............................................................................22

6.2 ACCESS ................................................................................................................................23

6.2.1 Control Panel .......................................................................................................23

6.2.2 Service Panel (Rear Panel) .................................................................................23

6.2.3 Baffle ....................................................................................................................23

6.2.4 Control Panel (Rear) ............................................................................................23

6.3 REPLACEMENT....................................................................................................................24

6.3.1 Light Bulb / Glass .................................................................................................24

6.3.2 Door Microswitch .................................................................................................24

6.3.3 Indicator Neon Light.............................................................................................24

6.3.4 Power / Roast / Lights / Water Switches..............................................................24

6.3.5 Buzzer ..................................................................................................................24

6.3.6 Bake Timer...........................................................................................................25

6.3.7 Roast Timer..........................................................................................................25

6.3.8 Thermostat ...........................................................................................................25

6.3.9 Hold Thermostat ..................................................................................................26

6.3.10 Mini-Contactor......................................................................................................26

6.3.11 Water Solenoid ....................................................................................................26

6.3.12 Water Solenoid Cleaning .....................................................................................27

6.3.13 Spray Nozzle........................................................................................................27

6.3.14 Elements ..............................................................................................................27

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6.3.15 Fan .......................................................................................................................27

6.3.16 Motor ....................................................................................................................28

6.3.17 Outer Glass .......................................................................................................... 28

6.3.18 Inner Glass...........................................................................................................29

6.3.19 Inner Glass Seal ..................................................................................................29

6.3.20 Door Seals ...........................................................................................................29

6.3.21 Door Pivot Bushes ...............................................................................................29

6.4 ADJUSTMENT / CALIBRATION ..........................................................................................30

6.4.1 Thermostat Calibration.........................................................................................30

6.4.2 Door Microswitch Adjustment ..............................................................................31

6.4.3 Door Alignment ....................................................................................................31

6.4.4 Hold Temperature Adjustment .............................................................................31

6.4.5 60 Minute Timer Zero Position Adjustment..........................................................31

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6.1 FAULT DIAGNOSIS

6.1.1 OVEN DOES NOT OPERATE / START

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 incorrect, check electrical connection of
supply wiring and / or check electrical supply.

Power switch faulty

Check if power switch latches. If the switch
does not latch, then switch is faulty—replace.

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:

6.1.2 FAN DOESN’T OPERATE

Microswitch out of adjustment

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.

Microswitch faulty

Check voltage across microswitch terminals to
neutral.

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.

If not, microswitch is faulty—replace.

When power switch is latched, it

should illuminate if operating
correctly.

Microswitch

com

Fan motor faulty

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.

If fan is free to spin and the voltage supply is
correct, then the motor is faulty—replace.

6.1.3 OVEN LIGHT NOT ILLUMINATING—
DOOR OPEN

No power to light

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.

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.

Check voltage across micro-switch terminals
to neutral.

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.

If not, microswitch is faulty—replace.

6.1.4 OVEN LIGHT NOT ILLUMINATING—
DOOR CLOSED

Light switch faulty

Check voltage to the bottom terminal of the
switch. If there is no voltage, then check
wiring.

With switch depressed, check voltage at top
terminal. If there is no voltage, then replace
the switch.

If voltage is correct, then check wiring to light.

NOTE:

Alternately, perform a continuity test

across the terminals with the light
switch depressed.

n.c.

n.o.

Figure 6.1.1

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6.1.5 NO WATER INJECTION / STEAM

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.

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© Moffat Ltd, January 2009

Check voltage to the bottom terminal of the
switch. If there is no voltage, then check
wiring.

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.

If the power supply to the coil is correct,
disconnect wiring to coil and check the
resistance of the coil windings.

Correct coil resistance: 2500 ohms

NOTE:

If open circuit / high resistance, then

the coil is faulty—replace.

If coil resistance is correct, rewire and listen
for an audible solenoid click when the steam
switch is depressed.

If solenoid can be heard functioning, and oven
water nozzle is not blocked, then remove
water solenoid and fittings and check for
blockages.

6.1.6 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).

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).

6.1.8 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.

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.

6.1.7 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.

Buzzer

Buzzer Terminals

Figure 6.1.2

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.

Terminal A1

Contact

Indicator

Terminal 21

Terminal 22

Terminal A2

Figure 6.1.3

If indicator is in the ‘1’ position then check the
voltage across contactor coil terminals A1 and
A2.

NOTE:

There should be no voltage across

these terminals when ‘Roast ‘n Hold’
is not selected.

If the indicator is in position ‘1’ with no voltage
across A1 and A2 then the contactor is
faulty—replace.

Thermostat faulty

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.

If the voltage is correct and the heating light is
on then check all wiring to elements.

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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 tempera­ture 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.

Bottom Element
Terminals

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

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%

6.1.13 TOP ELEMENT NOT WORKING (IN
BAKE MODE—NOT GRILL / BROIL)

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%

6.1.14 NO THERMOSTAT HEATING
INDICATOR

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.

6.1.15 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.

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.

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NOTE: Top inner element current draw:

208 V: 8.7A ± 5%
220—240 V: 7.8A ± 5%

6.1.16 GRILL INDICATOR NOT WORKING

Indicator faulty

Check the voltage across the indicator
terminals. If the voltage is correct then
indicator is faulty—replace.

If there is no voltage then check wiring.

6.1.17 ROAST TIMER (180 MINUTE) WILL
NOT TIME DOWN

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
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.

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.

Terminal 4

Terminal 1

Terminal 2

Terminal 5

Terminal 6

Terminal 3

Figure 6.1.5

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.

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 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.

With the switch latched, check voltage across

terminal 1 to terminal 3 or 4. If there is no
voltage then check for fault in wiring.

Check voltage across terminal 2 to terminal 3
or 4. If there is no voltage then switch is
faulty—replace.

NOTE:

When the switch is latched, it should

illuminate if operating correctly.

6.1.18 NO HOLD INDICATOR

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.

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.

6.1.19 HOLDING TEMPERATURE
INCORRECT

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.

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).

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 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.

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 the voltage is correct but the bottom
element is not working then check wiring.

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6.2 ACCESS

6.2.1 CONTROL PANEL

1) Open the oven door. Remove microswitch
button by pulling straight off.

2) Undo the two screws now visible.

Microswitch
Button

6.2.3 BAFFLE

1) Remove trays, racks, element cover and
left hand side rack.

2) Undo lamp cover.

Lamp
Cover

Two
Screws

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.

Figure 6.2.2

6.2.2 SERVICE (REAR) PANEL

1) Undo the four screws holding the panel.

Side
Rack

Figure 6.2.4

3) Remove baffle.

6.2.4 CONTROL PANEL—REAR

Buzzer

Power Switch

Heating Indicator

Grill / Broil Indicator

Thermostat

Bake Time Up
Indicator

Bake Timer (60 minute)

Roast‘n Hold Switch

Mini Contactor

Roast ‘n Hold Time
Up Indicator

Element
Cover

Four
Screws

Figure 6.2.3

2) Remove panel.

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Roast Timer (180 minute)

Steam Switch

Light Switch

Hold Thermostat

Figure 6.2.5

© Moffat Ltd, January 2009

6.3 REPLACEMENT

6.3.1 LIGHT BULB / GLASS

1) Unscrew lamp cover.

Neon
Wires

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.

Figure 6.3.1

2) Unscrew bulb out of fitting.

3) Screw in replacement bulb.

4) Ensure seal fitted. Screw lamp cover into
holder with baffle fitted (do not over
tighten).

6.3.2 DOOR MICROSWITCH

1) Remove service panel (refer 6.2.2).

2) Remove two screws holding microswitch
to bracket.

Two Screws

Figure 6.3.2

6.3.4 POWER / ROAST / LIGHTS / WATER
SWITCHES

1) With control panel open (refer 6.2.1)
remove the wires from the back of the
switch, noting their positions.

Switch
Wires

Figure 6.3.4

2) From back push switch through front of
panel.

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 holding buzzer
bracket to panel.

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.

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Two Screws

Figure 6.3.5

© Moffat Ltd, January 2009

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.

Two
Screws

Figure 6.3.6

4) Transfer wires to new buzzer.

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.

Two Screws

6.3.8 THERMOSTAT

1) Pull knob off front of thermostat

2) Open control panel (refer 6.2.1) and undo
two screws securing thermostat.

Two Screws

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.

Figure 6.3.7

3) Transfer wires to new timer.

4) Withdraw old timer and insert new timer,
securing with screws.

5) Replace knob.

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.

Two Screws

Figure 6.3.8

Two
Screws

Figure 6.3.10

5) Withdraw old thermostat phial through
rear of oven.

6) Remove fibreglass sleeve from old
thermostat and fit it to replacement
thermostat.

Fibreglass Sleeve

Thermostat Phial

Figure 6.3.11

7) Insert new thermostat.

8) Re-assemble in reverse order.

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6.3.11 WATER SOLENOID 6.3.9 HOLD THERMOSTAT

1) Open control panel (refer 6.2.1) and undo
two screws securing hold thermostat
bracket.

Two Screws

Figure 6.3.12

2) Transfer wires to new thermostat.

3) Remove service panel (refer 6.2.2) and
from inside of oven loosen the thermostat
phial 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.

4) Disconnect hose fitting.

5) Unscrew the three screws holding
solenoid bracket to the rear of unit and
remove valve assembly.

Two
Screws

Figure 6.3.13

4) Withdraw old thermostat phial through
rear of oven.

5) Insert new thermostat.

6) Re-assemble in reverse order.

6.3.10 MINI-CONTACTOR

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

Figure 6.3.14

3) Secure new mini-contactor to control
panel using two screws.

Figure 6.3.16

Three Screws

6) On suitable work surface, remove brass
piping connections (1/2” spanner) and two
screws (on bracket) and extract solenoid.

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).

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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.

Two Screws

2) Unscrew the element from inside the
oven.

Top Element
One Screw

Bottom Element
Two Screws

Figure 6.3.18

3) Remove the valve assembly.

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.

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.

Figure 6.3.21

3) Pull element carefully to remove.

4) Replace and re-assemble in reverse
order.

Element Ratings ±5%

208 V 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.

NOTE: LH thread - Turn clockwise to

loosen.

Water Injection
Nozzle

Figure 6.3.20

2) Clean or replace as required, ensuring
debris free on re-assembly.

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).

E31 convection oven (Applies to units from S/N 40423)

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Centre Nut

Figure 6.3.22

2) Replace and re-assemble in reverse
order.

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© Moffat Ltd, January 2009

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.

3) Remove LH screw whilst supporting the
door. Lift bracket and remove door from
oven.

Screws (4)

60 Hz
Terminal

Neutral

50 Hz
Terminal

Earth /
Ground

Figure 6.3.23

3) Remove three screws holding motor to
bracket and remove motor.

Three Screws

LH Screw

Figure 6.3.26

4) Remove screws securing door handle.

Screws

Figure 6.3.27

5) Remove two screws in top trim and two
screws in bottom trim of door, and remove
trim panels.

Figure 6.3.24

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

1) Open door

2) Undo two screws securing Turbofan cover
plate to oven, and remove cover plate.

2 Screws

Figure 6.3.25

Two
Screws

Two Screws

Figure 6.3.28

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.

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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.

Retaining

Lugs

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.

6.3.19 INNER GLASS SEAL

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.

Door Pivot

Bush

Figure 6.3.31

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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6.4 ADJUSTMENT / CALIBRATION

6.4.1 THERMOSTAT CALIBRATION

IMPORTANT: I F TH E OV E N

TE M P E RA T UR E NE E D S T O B E
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
B E F O R E C A RR YI N G O U T A N Y
ADJUSTMENT.

Calibration Nut

Thermostat Shaft

Thermostat

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.

Screws

Grill/Broil Switch

Thermostat

Figure 6.4.1

1) Turn off power.

2) Remove thermostat knob by pulling it
firmly away from control panel.

3) Open control panel (refer 6.2.1). Remove
two screws on control panel holding
thermostat.

Screws

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).

Calibration Nut

Figure 6.4.2

4) The thermostat can now be removed.

E31 convection oven (Applies to units from S/N 40423)

Revision 4/F3506

Figure 6.4.5

8) Reassemble Grill/Broil switch onto the
thermostat and fit assembly back onto
control panel.

9) Turn on power and recheck oven
thermostat calibration.

10) Repeat procedure if necessary.

-30-

© Moffat Ltd, January 2009

6.4.2 DOOR MICROSWITCH ADJUSTMENT

6.4.4 HOLD TEMPERATURE ADJUSTMENT

1) Open oven door.

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

Figure 6.4.6

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) 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.

Hold Thermostat

Dial

Figure 6.4.9

6.4.5 60 MINUTE TIMER ZERO POSITION

ADJUSTMENT

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

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 (Applies to units from S/N 40423)

Revision 4/F3506

Figure 6.4.10

3) The timer can now be rotated as required
to ensure that the buzzer sounds at the
zero position.

-31-

© Moffat Ltd, January 2009

7. ELECTRICAL CIRCUIT SCHEMATIC

E31 convection oven (Applies to units from S/N 40423)

Revision 4/F3506

-32-

© Moffat Ltd, January 2009

8. ELECTRICAL WIRING DIAGRAM

E31 convection oven (Applies to units from S/N 40423)

Revision 4/F3506

-33-

© Moffat Ltd, January 2009

9. SPARE PARTS

PART NO DESCRIPTION

CONTROLS

M021473

M017121

M020823

M020849
M011760
M011794

M021476
M011419
M021472
M021474

M022281 Relay
M018223 Hold Thermostat
M002990
M003002
M003434

M013521

MOTOR & ELEMENTS

M003113

M003114

M011604
M003074
M013431K
M013432

Thermostat

Neon Indicator
Bake Timer
Buzzer

Microswitch
Oven Lamp Glass
Silk Gasket

Switch - Power

Knob - Thermostat / Bake Timer

Switch - ‘Roast n Hold’
‘Roast n Hold’ Timer
‘Roast n Hold’ Timer Knob
Switch - Steam / Light

Oven Lamp - 40W Min. Edison Screw

Oven Top Element 208 Volts
Oven Bottom Element 208 Volts
Oven Top Element 240 Volts
Oven Bottom Element 240 Volts
Fan Motor
Oven Fan

STEAM SYSTEM

M012781

DOOR

M014225
M014226

M021469
M021468

M021465

M021444
M002340

M011005
M013610

RACKS

M003382
M012809

Handle Assembly
Handle
Handle Bracket

Door Catch
Door Bush

Oven Rack

Water Solenoid

Oven Door Seal Strip Side
Oven Door Seal Strip Top / Bottom

Door Outer Glass
Door Inner Glass

Oven Side Rack

E31 convection oven (Applies to units from S/N 40423)

Revision 4/F3506

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© Moffat Ltd, January 2009

10. ACCESSORIES

OVEN RACKS (PART NO M012809)

A25 STAINLESS STEEL STAND

100 MM (FOUR INCH) FOOT OPTION
(PART NO M013048)

25 MM (ONE INCH) FOOT OPTION
(PART NO M013908)

E31 convection oven (Applies to units from S/N 40423)

Revision 4/F3506

-35-

© Moffat Ltd, January 2009

11.1 MAIN ASSEMBLY

11. PARTS DIAGRAMS

E31 convection oven (Applies to units from S/N 40423)

Revision 4/F3506

-36-

© Moffat Ltd, January 2009

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

M021533
M090406

M013011

M013012
M011412

M011389

M002990

M003012

M011414

M003016 MOTOR MOUNTING PLATE
M013431K MOTOR
M012782 HOSE CONNECTOR

M011634

M012781

M019208

M012784
M012785

M011404

M013586

M002138
M002441
M018251
M013053

M013048
M013908

25
26
27
28
29
30

M004594

M017770

M004004

M011413

M011407

M013520
M003434
M013521
M003002

31
32

M013432

M004005

M004595

33
34

M003123

M003113
M011604

35

M003074

M003114

36
37
38
39

M003219

M002083

M012809

M003382
M012798

40
41 M003057
42

M012787

BOTTOM ELEMENT GUARD

M014225

M003028

43

M014226

M003038 HORIZONTAL SEAL - 508mm

44
45
46
47

M004731 PIVOT COVER - TOP
M011422 PIVOT SUPPORT - TOP ASSEMBLY
M021528

M004006

WRAPPER
INSULATION
COVER PANEL
COVER PANEL PLATE
MICROSWITCH BRACKET
MICROSWITCH INSULATOR
MICROSWITCH
ACTUATOR ROD
VENT TUBE

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

OVEN SEAL ASSEMBLY - VERTICAL
VERTICAL SEAL - 455mm
OVEN SEAL ASSEMBLY - HORIZONTAL

TOP TRIM
DOOR INNER

E31 convection oven (Applies to units from S/N 40423)

Revision 4/F3506

-37-

© Moffat Ltd, January 2009

48
49
50
51
52
53
54

55
56

M021465
M021468

----------

M021530
M013610
M011424
M002340
M090201

M004452

M021444
M090225

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

E31 convection oven (Applies to units from S/N 40423)

Revision 4/F3506

-38-

© Moffat Ltd, January 2009

11.2 CONTROL PANEL ASSEMBLY

E31 convection oven (Applies to units from S/N 40423)

Revision 4/F3506

-39-

© Moffat Ltd, January 2009

Pos Part No. Description

1
2
3
4
5
6

7

8
9
10
11
12
13
14

15
16
17
18
19
20

M018224

M018223

HOLD THERMOSTAT

M021538
M017121
M011760
M011419

M011983
M022281

M022282

CONTACTOR
CONTACTOR KIT (REPLACES 22199 & 21491 RELAYS) (PRE S/N

HOLD THERMOSTAT KNOB

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)

42473)

M021536 CONTACTOR BRACKET
M018789 BALL CATCH PLATE

M011005
M021442

M011794

BUZZER

M021537

M004722

CONTROL PANEL BAKBAR °C

M004803
M004729
M013610

DOOR BUSH

M021474
M020823

M020849

PILOT LIGHT

M021476

M021473

POWER SWITCH

BALL CATCH & LOCKNUT
TIMER MOUNTING PANEL

BUZZER MOUNTING BRACKET

CONTROL PANEL BLUE SEAL °C
CONTROL PANEL MOFFAT °F

LIGHT / STEAM SWITCH
THERMOSTAT / TIMER KNOBS

ROAST ‘N’ HOLD SWITCH

E31 convection oven (Applies to units from S/N 40423)

Revision 4/F3506

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© Moffat Ltd, January 2009

AUSTRALIA

11. SERVICE CONTACTS

VICTORIA

NEW SOUTH WALES

QUEENSLAND

SOUTH AUSTRALIA

WESTERN AUSTRALIA

HEAD OFFICE AND MAIN WAREHOUSE

740 Springvale Road Tel [phone]
Mulgrave VIC 3170 Fax [phone]
Spare Parts Department Free Call 1800 337 963

Unit 8/142 James Ruse Drive
Rosehill
Spare Parts Free Call 1800 337 963

30 Prosperity Place
Geebung QLD 4034
Spare Parts Free Call 1800 337 963

Suite 8/71 Fullarton Rd Tel [phone]
Kent Town SA 5067
Spare Parts Free Call 1800 337 963

PO Box 689 Tel [phone]
Joondalup Business Centre WA 6027
Spare Parts Free Call 1800 337 963

NSW

Fax [phone]

2142

Fax [phone]

Fax [phone]

NATIONAL COVERAGE FOR 24 HOUR SERVICE OR MAINTENANCE DIAL

CANADA

Lessard Agencies Limited Tel [phone]
PO Box 97 Fax [phone]
Stn “D” Free Call 1 888 537 7273
Toronto, ONT M6P 3J5

NEW ZEALAND

C

HRISTCHURCH

16 Osborne St Free Call 0800 Moffat
PO Box 10-001 (0800 663 328)
C

hristchur

Spare Parts Tel [phone]

AUCKLAND

4 Waipuna Road Tel [phone]
Mt Wellington Fax [phone]

uckland

A
Spare Parts Free Call 0800 Moffat

FREE CALL 1800 622 216 (AUSTRALIA ONLY)

ch

Fax [phone]

(0800 663 328)

E31 convection oven (Applies to units from S/N 40423)

Revision 4/F3506

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© Moffat Ltd, January 2009

UNITED KINGDOM

BLUESEAL LTD
Units 6-7 Mount St Tel [phone]
Business Park Fax [phone]
Birmingh

am B7

5QU

England

UNITED STATES OF AMERICA

MOFFAT INC.
3765 Champion Blvd
Winston-Salem
NC27115

NATIONAL COVERAGE FOR SERVICE OR MAINTENANCE DIAL

FREE CALL 1866 673 7937 (USA ONLY)

Tel [phone]
Fax [phone]

E31 convection oven (Applies to units from S/N 40423)

Revision 4/F3506

-42-

© Moffat Ltd, January 2009

APPENDIX A. POWER RELAY UPGRADE KIT

Kit Includes

1 x Power relay
2 x Screw - 8 x
1 x 160mm black wire
1 x 180mm red wire
1 x 950mm red wire
1 x 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.

3

/8 truss

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.

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.

Locate end of thick red wire previously fed

into control cavity and connect to terminal 7
of the ‘Schrack’ relay.

64

85

185

Figure A.1

Power switch

Mini-contactor

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 (Applies to units from S/N 40423)

Revision 4/F3506

-43-

Figure A.2

© Moffat Ltd, January 2009

Units fitted with mini-contactor:

Units fitted with ‘Schrack’ relay:

33

BUZZER

22

23

TOP

ELEMENT

45

37

44

32

31

GRILL

HEAT

28

21

27

P5

2

24

T/STAT

5

6

1

P6

26

11

12

33

POWER

4

3

2

1

52

1

22

34

35

40

47

N

39

38

E

P

9

20

23

4

1hr TIMER

1

2

3

TIME

25

UP

15

2

35

31

2

3

25

14

13

50

76341

A

9

B

SCHRACK RELAY

30

24

11

FAN MOTOR

COM

MICROSWITCH

14

13

12

ROAST

29 15 49

40

47

1

E

3

4

60Hz

50Hz

10

9

6

NO

NC

8

19

20

46

BOTTOM
ELEMENT

36

45

48

WATER

SOLENOID

48

41

36

37

44

7

4

1

5

2

3hr TIMER

6

3

17

17

3

4

4

3

2

1

HOLD
LIGHT

WATER

21

LIGHTS

2 1

5 4

8

6

18

19

HOLD

T/STAT

525150

7

A

31649

B

POWER RELAY

7

515353

Ø

N

E

42

MAINS

TERMINAL BLOCK

1

29

43

E31 convection oven (Applies to units from S/N 40423)

Revision 4/F3506

-44-

© Moffat Ltd, January 2009