turbofan 30D Series E31D4 User manual

Amendment 9
Monday, 4 August 2014
Service Manual
E31D4
(Digital Operation)
30D SERIES

The reproduction or copying of any part of this manual by any means whatsoever is strictly forbidden unless authorized previously in writing
by the manufacturer.
In line with policy to continually develop and improve its products, Moffat Ltd. reserves the right to change the specifications and design
without prior notice.
© Copyright Moffat Ltd. August 2014.
MANUFACTURED BY
Moffat Limited
Christchurch
New Zealand
INTERNATIONAL CONTACTS
AUSTRALIA
Moffat Pty Limited
E.Mail: [email protected]
Main Office: (tel) [phone]
(fax) (03 9518 3833
Service: (tel): 1800 622 216
Spares: (tel): 1800 337 963
Customer Service: (tel): 1800 335 315
(fax): 1800 350 281
CANADA
Serve Canada
Web: www.servecanada.com
E.Mail: [email protected]
Sales: (tel): 800 551 8795 (Toll Free)
Service: (tel): 800 263 1455 (Toll Free)
NEW ZEALAND
Moffat Limited
Web: www.moffat.co.nz
E.Mail: [email protected]
Main Office: (tel): 0800 663328
UNITED KINGDOM
Blue Seal
Web: www.blue-seal.co.uk
E.Mail: [email protected]
Sales: (tel): 0121 327 5575
(fax): 0121 327 9711
Spares: (tel): 0121 322 6640
(fax): 0121 327 9201
Service: (tel): 0121 322 6644
(fax): 0121 327 6257
UNITED STATES
Moffat
Web: www.moffat.com
Sales: (tel): 800 551 8795 (Toll Free)
(tel): 336 661 1556
(fax): 336 661 9546
Service: (tel): 800 858 4477 (Toll Free)
(tel): 366 661 1556
(fax): 336 661 1660
REST OF WORLD
Moffat Limited
Web: www.moffat.co.nz
E.Mail: [email protected]

Contents List
E31 Turbofan Convection Oven.
Model Numbers Covered in this Manual
E31D4 - Turbofan Oven - 4 Tray Convection Oven.
1. Specifications ....................................................................................................2
2. Installation ........................................................................................................3
Installation Requirements
Unpacking
Location
Clearances
Stand Mounted Ovens
Electrical Connection
Positioning and Levelling of Oven
Initial Start-Up
3. Operation...........................................................................................................5
Oven Control Panel
Setting the Operator Accessible Parameters
Table of Operator Accessible Parameters
Setting the Oven Programs
4. Fault Finding......................................................................................................8
Operational Faults
Component Testing
Element Resistance and Current Value Table
Probe Resistance Value Table
5. Service Procedures ..........................................................................................10
5.1 Access
5.2 Replacement
5.3 Adjustments and Calibration
5.4 Controller Parameters
6. Electrical Schematics.......................................................................................17
7. Wiring Diagrams..............................................................................................18
8. Replacement Parts List ...................................................................................19
9. Accessories ......................................................................................................25
Appendix 1 - Oven Door Reversal.........................................................................26
ALL INSTALLATION AND SERVICE REPAIR WORK MUST BE CARRIED OUT BY QUALIFIED PERSONS
ONLY.
IMPROPER INSTALLATION, ALTERATION, ADJUSTMENT, MAINTENANCE OR SERVICE MAY CAUSE
PROPERTY DAMAGE, INJURY OR DEATH.
ENSURE SUPPLY IS SWITCHED OFF BEFORE SERVICING.
ALWAYS TEST AFTER SERVICE REPAIRS.
WARNING:

Specifications
2
E31D4
Oven Tray Details
Tray Capacity Tray Spacing
208V, 1P+N+E, 50/60HZ, 2.9 kW
220V, 1P+N+E, 50/60HZ, 3.1 kW
230-240V, 1P+N+E, 50/60HZ, 3.1 kW
4 x GN 1/1 Pan
4 x US ½ Pan 80 mm / 31/6”
Oven Power Ratings

Installation
3
Installation Requirements
Unpacking
1. Remove all packaging and transit protection including
all protective plastic coating from the exterior stainless
steel panels.
2. Check the oven and supplied parts for damage. Report
any damage immediately to the carrier and distributor.
3. Check that the following parts have been supplied with
your oven:-
4 x Leg Adjustable.
4. Report any deficiencies to the distributor who supplied
your oven.
5. Securely fit the 4 legs supplied with the oven.
6. Check that the available electrical supply is correct to
that shown on the Technical Data Plate located on the
front right hand side panel.
 Refer to ‘Specifications’ section, ‘Oven
Specifications Tables’.
Location
1. Position the oven in its approximate working position.
2. The unit should be positioned so that the control panel
and oven shelves are easily reachable for loading and
unloading.
Clearances
To ensure correct ventilation for the motor and controls,
the following minimum installation clearances are to be
adhered to:-
Top 200mm / 8”.
Rear 75mm / 3”.
Left-hand side 75mm / 3”.
Right-hand side 75mm / 3”.
CLEARANCE FROM SOURCE OF HEAT.
A minimum distance of 300mm (12”) from appliance
sides is required.
NOTE: Fixed installations require at least 500mm - 20”
clearance at right hand side of oven for
service access.
Stand Mounted Ovens
For ovens that are to be mounted to a stand, the oven feet
are used to level the oven on the stand. Refer to the
instructions supplied with separately ordered stands for
mounting details.
Important:
The vent located at the rear of the oven must NOT be
obstructed.
Important:
 Installation shall comply with local electrical, health and safety requirements.
 It is most important that this oven is installed correctly and that oven operation is correct before use.
 If you have any questions regarding the proper installation and / or operation of this oven, please contact your local
Turbofan distributor.
Technical Data Plate - Location
Oven Vent Location

Installation
4
Electrical Connection
Each oven should be connected to an adequately protected
power supply and an isolation switch mounted adjacent to,
but not behind the oven and must be readily accessible to
the operator. This switch must be clearly marked and
readily accessible in case of fire.
Check the electricity supply is correct to as shown on the
Technical Data Plate on the front right hand corner of the
oven side panel.
Ensure that the oven is fitted with the appropriate power
cord and plug.
Positioning and Levelling of Oven
1. Correctly locate the oven into its final operating position
and using a spirit level, adjust the oven feet so that the
oven is level and at the correct height.
Initial Start-Up
Before using the new oven;
1. For first time use of the oven, operate the oven for
about 1 hour at 200°C / 400°F to remove any fumes or
odours which may be present.
2. Please refer to the Operation Section of this manual for
details on how to correctly operate and shutdown the
oven.
Commissioning
Before leaving the new installation;
Check the oven functions in accordance with the
operating instructions specified in the ‘Operation’
section of this manual.
Ensure that the operator has been instructed in the areas
of correct operation and shutdown procedure for the
appliance.
NOTE: If for some reason it is not possible to get the
appliance to operate correctly, turn off the
power supply at the mains supply and contact
the supplier of this appliance.
This oven must be earthed / grounded.
If the supply cord is damaged, it must be replaced by a
suitably qualified person in order to avoid a hazard.
Warning

Operation
5
Operation Guide
 Turbofan Ovens have been designed to provide simple operation.
 This oven is intended for use in a commercial kitchen and must only be put to the use for which it was intended, i.e.
cooking food product. To use this oven correctly please read the following sections carefully:-
Oven Control Panel
Temperature Display - Shows the
preset chamber temperature.
When used with ‘Temperature’ Button,
shows actual oven temperature for 5
seconds.
Shows Cooking Modes and Error
Codes.
Grill / Broil Button and LED -
Switches between ‘Baking Mode’ and
‘Grill / Broil Mode’.
Temperature Adjustment Control.
Time Display - Shows cook time in full
minutes only from 180 - 1, and
seconds for final minute only.
On / Off / Stand-By Button and
LED - Press ‘On / Off’ Button once to
turn the oven ‘On’.
Press and hold ‘On / Off’ Button for 3
seconds to turn the oven ‘Off’.
Time Adjustment Control.
Some parts of this oven will become VERY
HOT during use and could cause burns if
touched.
Warning
Take care when opening the oven door
during baking. Let hot air and steam escape
before removing or replacing food as the
steam produced can cause steam burns.
Warning
Programming Button and LED -
Used to enter the ‘Programming’
mode.
Temperature Button and LED -
Shows actual oven temperature for 5
seconds on the Temperature Display.
LED ‘On’ when heating; LED flashes
when showing actual temperature.
Light On / Off Button and LED -
Turns oven light ‘On / Off’.
Start / Stop Button and LED -
Pressing the ‘Start / Stop’ Button oven
switches between ‘Time Start’ and
‘Temporary Pause’ Modes. LED will
flash when timer is paused.
When in the cooking cycle, pressing
the ‘Start / Stop’ Button for 3 seconds
will end the cooking cycle.

Operation
6
Setting the Operator Accessible Parameters
With the Oven in ‘Stand-By’ mode:-
1. ENTER THE OPERATOR PARAMETER MODE.
Press 'Grill / Broil' and 'Start / Stop' buttons together.
‘Temperature’ Display will show ‘PAS’.
The ‘Time’ Display will flash.
2. SET PASSWORD.
Rotate ‘Timer Control’ to set password;
(123) (Operator Password).
Press ‘Light On / Off’ button to confirm password.
‘Temperature’ Display will show one of Parameter Codes.
‘Time’ Display will show value of the parameter.
3. SETTING THE PARAMETERS.
Rotate ‘Timer Control’ to parameter required.
Press ‘Light’ button to confirm parameter. ‘Time’ display will flash.
While ‘Time’ display is flashing, rotate ‘Timer Control’ to
select value required.
Press ‘Light’ button to confirm value. ‘Time’ display will stop flashing.
4. EXITING THE PARAMETER MODE.
Press ‘On-Off’ button, to return to ‘Stand-By’ mode.
Table of Operator Accessible Parameters
Parameter
Number. Description Default Setting
Turn -On Pre-Heating Temperature. (60 - 260˚C / 140 - 500˚F). 150ºC
(325ºF)
Light Auto ‘Off’ Setting Time -
0 = ‘On/Off’.
1 = 1 minute auto ‘Off’.
2 = 2 minutes auto ‘Off’, etc.
1
Buzzer Volume - Can be adjusted from ‘0’ to ‘10’. 5
Preheat Ready Temp above Set Temp (Programs Only) - (Can be adjusted from 0 to 30ºC {0 to 54ºF}
above Cooking Temperature).
20ºC
(36ºF)

Operation
7
Setting the Oven Programs
Oven can be pre-programmed with up to 20 Program’s. When you receive your oven, the controller is not programmed. To
set programs, carry out the following for each program required:-
1. ENTER PROGRAMMING MODE.
Press ‘Programs’ button to enter ‘Programming’
mode.
2. SELECT PROGRAM REQUIRED.
Rotate ‘Temperature Control’ to program required.
Temperature Display will show program selected.
Press and hold ‘Temperature’ button until
‘Time’ and ‘Temperature’ displays and
‘Temperature’ button LED flashes.
Change time and temperature parameters.
3. ENTER COOK TEMPERATURE.
Rotate ‘Temperature Control’ to set cook
temperature.
+to increase the temperature.
-to decrease the temperature.
‘Temperature’ Display will show temperature
selected.
4. ENTER COOK TIME.
Rotate ‘Timer Control’ to set cook time.
+to increase the time.
-to decrease the time.
‘Time’ Display will show time selected.
‘Time’ and ‘Temperature’ displays and
‘Temperature’ button LED flash.
Press ‘Temperature’ button to confirm ‘Time’
and ‘Temperature’ settings.
Heating ‘On’
Indicator
Timer ‘On’
Indicator

Fault Finding
8
OPERATIONAL FAULTS
FAULT FUNCTIONS OTHER
INDICATORS CAUSE
Oven not operating No oven functions possible.
Not plugged in.
Power supply switch off.
Fuse blown or Circuit breaker tripped.
Power cord damaged.
Controller ‘Off’ Power to oven ‘On’
No power to transformer. Overtemp tripped.
12 Vac from transformer. Controller faulty.
No 12 Vac from transformer. Transformer faulty.
No Heat Controller indicates ‘On’ Power to relay. Relay faulty.
Power to element. Element faulty.
No Heat, Lights, Grill Controller indicates on Plug off controller.
No Fan Controller indicates ‘On’. Power to fan. Plug is disconnected from controller.
Fan faulty.
Grill not Heating Controller indicates ‘On’ Power to relay. Relay faulty.
Power to element. Element faulty.
Light ‘Off’ Oven ‘On’ Lamp switch LED ‘On’. Lamp faulty.
Still heating Oven switched ‘Off’ Relay stuck ‘On’.
Door does not fully close
Door seal incorrectly fitted.
Tray in way of door.
Door not fitted correctly.
Oven door hot Inner glass not fitted.
Uneven cooking
Too high a temperature selected.
Oven overloaded with too much product.
Insufficient air space around trays or baking
tins.
Opening oven door un-necessarily.
Oven door seal damaged or faulty.
Oven or racks not level.
Oven vent restricted.
CONTROLLER FAULT CODES
FAULT CODE CAUSE
dor Door Open.
Door closed. Microswitch open circuit.
Err 001 Oven Temperature Probe Fault.
Err 003 Loop wire disconnect in Door Microswitch plug
at control board.

Fault Finding
9
COMPONENT TESTING
ITEM CONDITION TESTING FOR REPLACE
Overtemp (Push Reset).
Oven power OFF. Continuity through switch. If open circuit.
Voltage at Overtemp. Check power to switch and power out of switch. If no power out.
Transformer Voltage at Transformer. With controller connected 12Vac output. If no 12Vac.
Controller Voltage at Controller. Output to relays, lights fan. If no.
Door Switch Oven power OFF. Continuity through switch. If open circuit.
Temperature probe Disconnected. Resistance. If not correct.
Oven power OFF. Continuity. If open circuit.
Voltage at Element. Check current draw. If low or zero.
Relay Voltage at Relay Coil. Does relay switch. If no.
Relay contacts Voltage at Relay Contacts. Check power to switch and power out of switch. If no power out.
Fan Motor Voltage at Fan. Does fan rotate. If no.
Element
ELEMENT RESISTANCE & CURRENT VALUES
Model Watts Voltage Resistance ± 5% @20oC (68oF) Current ± 5%
E31D4 Bottom 2200W 230 - 240V 26.5 Ω9.1A @ 240V
21.6 Ω
9.6A @ 208V
10A @ 220V
Top Outer 900W 230 - 240V 64 0 Ω3.8A @ 240V
Top Inner 2000W 230 - 240V 28.8 Ω8.3 @ 240V
Top Outer 900W 208 - 220V 53.8 Ω
3.9A @ 208V
4.1@ 220V
Top Inner 2000W 208 - 220V 24.2 Ω
8.6A @ 208V
9.1@ 220V
Bottom 2000W 208 - 220V
TEMPERATURE PROBE RESISTANCE PT1000
Temperature oC (oF) Resistance ± 5%
0 (30) 1000 Ω
10 (50) 1039 Ω
20 (68) 1078 Ω
30 (86) 1117 Ω
40 (104) 1155 Ω
50 (122) 1194 Ω
60 (140) 1232 Ω
70 (158) 1271 Ω
80 (176) 1309 Ω
90 (194) 1347 Ω
100 (212) 1385 Ω
110 (230) 1423 Ω
120 (248) 1460 Ω
130 (266) 1498 Ω
140 (284) 1536 Ω
150 (302) 1573 Ω
160 (320) 1610 Ω
170 (338) 1648 Ω
180 (356) 1685 Ω

Service Procedures
10
5.1 Access...............................................................................................................10
5.1.1 Control Panel 11
5.1.2 Overtemp 11
5.2 Replacement ....................................................................................................12
5.2.1 Controller 12
5.2.2 Encoder 12
5.2.3 Transformer 12
5.2.4 Relay 12
5.2.5 Overtemp 13
5.2.6 Door Microswitch 13
5.2.7 Fan Motor 13
5.2.8 Temperature Probe 14
5.2.9 Element Top 14
5.2.10 Element Bottom 14
5.2.11 Door Inner Glass 14
5.2.12 Door Removal 15
5.2.13 Door Hinge 15
5.3 Adjustment & Calibration.................................................................................15
5.3.1 Door Microswitch Adjustment 15
5.3.2 Temperature Calibration 15
5.4 Controller Parameters ......................................................................................16
5.4.1 Controller Parameters 16

Service Procedures
11
5.1 Access
5.1.1 Control Panel
1. Remove screw on underside of control panel.
2. Lift panel up to unhook at top.
5.1.2 Overtemp
1. Locate the overtemp reset button on the rear underside
of the oven.
2. Push in centre plunger to reset.
Screw
Overtemp
Reset Button

Service Procedures
12
5.2.3 Transformer
1) Remove control panel (refer 5.1.1).
2) Disconnect power from transformer (2 yellow
wires).
3) Remove back panel.
4) Disconnect power to transformer.
5) Remove screws.
5.2.4 Relay
1) Remove back panel.
2) Disconnect wires from relay, note their positions.
3) Remove securing screws.
Transformer
5.2 Replacement
5.2.1 Controller
1) Remove control panel (refer 5.1.1).
2) Disconnect cables (7).
3) Undo securing nuts (8) 7mm, 9/32”.
Securing Nuts (8)
5.2.2 Encoder
1) Remove Encoder knob.
2) Remove control panel (refer 5.1.1).
3) Remove controller if necessary (refer 5.2.1).
4) Disconnect Encoder from Controller.
5) Remove 2 securing screws.
Securing screws

Service Procedures
13
5.2.6 Door Microswitch
1) Remove back panel.
2) Remove wires from switch.
3) Remove switch.
4) Check adjustment when new switch fitted.
5.2.5 Overtemp
1) Remove back panel.
2) Remove wires from overtemp.
3) Unhook back of phial from holder inside oven.
5) Pull phial towards back of oven to remove from
front holder.
6) Remove phial through back of oven.
7) Undo the two screws securing the overtemp to the
base panel.
8) To install new overtemp feed capillary and phial
through oven cavity.
9) Push phial through front holder and then locate
rear of phial into back holder.
10) Secure overtemp in position.
Unhook phial
Phial Holder Detail
5.2.7 Fan Motor
1) Remove Baffle plate.
2) Undo fan blade securing nut clockwise to undo.
(13mm)
Nut
3) Remove back panel.
4) Remove wires from fan motor.
5) Undo fan motor securing screws.
Fan Motor Securing Screws
Remove
screws

Service Procedures
14
5.2.8 Temperature Probe
1) Remove control panel (refer 5.1.1).
2) Remove probe connection from controller.
5.2.9 Top Element
1) Remove back panel.
2) Remove element wires from terminals.
3) Remove baffle plate.
4) Remove securing screw.
5.2.10 Bottom Element
1) Remove back panel.
2) Remove element wires from terminals.
3) Remove bottom element cover and baffle plate.
4) Remove securing screws.
Probe connection
3) Remove back panel.
4) Pull cable to rear of oven.
5) Undo probe securing screw inside oven.
6) Withdraw probe from rear of oven.
Probe screw
Element screw
Element screws
5.2.11 Door Inner Glass
1) Undo inner glass retaining clip.
2) Lift inner glass up and pull bottom outwards to
free bottom pivot. Note spacer is a loose fit over
the pivot and may fall out.
3) Lower inner glass to free top pivot and remove
glass.
Retaining Clip
Pivot Spacer

Service Procedures
15
5.2.12 Door Removal
1) Remove inner door glass (refer 5.2.11).
2) Whilst supporting the door, unscrew and remove
the top door pivot bolt from the top door hinge
assembly.
5.2.13 Door Hinge
1) Remove door (refer 5.2.12).
2) Remove 2 Hinge plate screws.
Remove Top Door Pivot Bolt.
3) Lift door off bottom hinge.
Remove Top or Bottom
Hinge Screws.
Door Microswitch
Activation Arm
5.3.1 Door Microswitch
1) Remove back panel.
2) Bend activation arm so switch open circuits when
door is open.
3) Check adjustment when door is opened and
closed.
5.3 Adjustments
5.3.2 Temperature Calibration
1) Place temperature probe in centre of the oven.
2) Close door and allow temperature to stabilise.
3) Enter service parameters settings menu on con-
trol and check P10 Temperature Offset.

Service Procedures
16
Parameter
Number
Description Min Max Default Value S/O
P1 Temperature Scale ˚C˚F˚C˚C(˚F) S
P2 Oven Model. 31 32 31 ---- S
P3 Minimum Temperature Setpoint. 0(32) 300(572) 60(140) ˚C(˚F) S
P4 Maximum Temperature Setpoint 0(32) 300(572) 260(500) ˚C(˚F) S
P5 NOT SHOWN WHEN P2 SET TO 31
PrH Pre-heat Temperature. P3 P4 150(325) ˚C(˚F) O
P7 NOT SHOWN WHEN P2 SET TO 31
P8 Hysteresis Temperature Gap. 1 10 1 ˚S
P9 Temperature Regulation Offset. 0 10 0 ˚S
P10
Chamber Temperature Offset.
(This offset is always added to the raw temperature measurement, in order to
correct the value. The value shown on the display is the corrected value).
-25(-45) 25(45) 20(36) ˚C(˚F) S
P11 Maximum Timer Setpoint. 1 180 180 Min S
P12 Timer Preset. 1 P11 0 Min S
L-O Time Light stays on 0 60 0 Min O
P14 NOT SHOWN WHEN P2 SET TO 31
P15 NOT USED WHEN P2 SET TO 31. 0 60 10 Min S
P16 NOT SHOWN WHEN P2 SET TO 31
P17 NOT SHOWN WHEN P2 SET TO 31
VoL Buzzer Volume 0 10 5 ---- O
P19 Grill Temperature Setpoint 0(32) 300(572) 280(536) ˚C(˚F) S
P20 NOT USED WHEN P2 SET TO 31. 0 1 1 ---- S
P21 Program Mode - Pre-heat temp condition. 0(32) 30(54) 20(36) ˚C(˚F) O
P22 Door open time—Program Mode Only 30 180 60 Sec S
5.4.1 Controller Parameters
1) With the controller off, press Grill/Broil and Start/
Stop for 5 seconds.
2) Is displayed in the Temperature display.
3) Turn the timer encoder knob until is
displayed in the Timer Display.
4) Push the Light button to enter.
5) Temperature display indicates current parameter,
Timer display indicates the parameter value.
6) See table for allowable values, default settings
and descriptions. Note 31 has to be set at P2.
5.4 Controller Parameters
1) To change the parameter turn the timer encoder
knob.
2) To enter the parameter, to change it’s value,
press the light button.
3) To change the value turn the timer encoder knob.
4) To enter the value press the light button.
5) Press on/off button to exit.

Electrical Schematics
17
Electrical Schematic E31D4 Turbofan Oven
208V, 50/60Hz.
220V, 50/60Hz.
230-240V, 50/60Hz

Wiring Diagram
18
208V, 50/60Hz.
220V, 50/60Hz.
230-240V, 50/60Hz
Wiring Diagram E31D4 Turbofan Oven