Merrychef HD1025, HD1925 Service Manual

Page 1
Merrychef
Microcook HD
SERVICE MANUAL
Part No. 32Z3385 Issue No. 5
For all Microcook HD & TA models manufactured from January 2001
SERVICE MANUAL
CAUTION MICROWAVE EMISSIONS
DO NOT BECOME EXPOSED TO EMISSIONS FROM THE MICROWAVE
GENERATOR OR PARTS CONDUCTING MICROWAVE ENERGY
Page 1 Microcook HD Ovens 32Z3385 Issue 5
Page 2
Table of Contents
Microcook HD Specification Sheet ........................................4
Microcook TA Specification Sheet…………….............. …….5
Installation Instructions ..........................................................6
Error Codes & Diagnostics ....................................................7
Power Output Test Procedure A............................................8
Simplified Power Output Test B.............................................9
Transformer / Capacitor Test Procedure C & D ..................10
Rectifier Test Procedure E ..................................................11
Door Interlock Operation .....................................................11
Oven Main Features ............................................................12
Rear Cover Assembly.........................................................13
Door Assembly 500mm Die Cast ........................................14
Door Assembly 650mm .......................................................15
Control Panel Assembly ......................................................16
Component Layout HD1025 ................................................17
Component Layout HD1425 / 1725 .....................................18
Component Layout HD1925 ................................................19
Component Layout HD2025…………………..... …………...20
Component Layout TA 1725, TA 1925 ................................21
Cavity Components .............................................................22
Door Mechanism Right side ................................................23
Door Mechanism Left side...................................................24
Hot Air Motor Assembly.......................................................25
Microcook TA Fan Control PCB and Heater Setup ...... 26-27
Input Wiring Details .............................................................28
Part Number Identification List ...................................... 29-30
Wiring Diagrams ............................................................ 31-35
Appendix 1 KFC components .............................................36
Appendix 2 Capacitors and Magnetrons .............................37
Appendix 3 Cleaning ..........................................................38
Appendix 4 MenuKey download ..........................................39
Appendix 5 Fitting 20A Anti surge fuses........................ 40-41
Appendix 6 Logic board and Magnetron Failure Detect ......42
Manual Corrections and Modifications ................................43
Safety Code...........................................................................3
Merrychef Limited, Station Road West, Ash Vale, Aldershot, Hampshire, GU12 5XA United Kingdom Tel: +44 (0)1252 371000 Fax: +44 (0)1252 371007 Internet address: http://www.merrychef.com
E-mail: sales@merrychef.com or service@merrychef.com
Page 2 Microcook HD Ovens 32Z3385 Issue 5
Page 3
SAFETY CODE
This manual is designed to assist engineers who have successfully completed a Merrychef Service training course. It has been prepared to offer technical guidance for the Merrychef Microcook HD and Microcook TA Commercial Microwave Ovens.
Please remember that it is wiser not to attempt a service task if you are unsure of being able to complete it competently, quickly, and above all safely.
To avoid injury to yourself, and to protect the appliance from possible damage, please follow this Safety Code when servicing these ovens.
Before attempting to repair the oven, check it for microwave leakage.
Check that the oven is not emitting microwaves,
even when supposedly not in operation.
Check that the oven is not operating continuously,
whether the display indicates cooking or not.
Always discharge the HT capacitors before working on the oven
using a suitably insulated 10 M Resistor
The following must be carried out prior to removing the rear cover from the oven :
Switch off the mains supply and remove the plug from the wall socket.
or
If the oven is hard wired, ensure that the power is turned off at the mains
isolator switch.
Upon completion of a service on an Microcook oven, or before reconnecting the appliance to the mains supply for testing, check all of the following points:
All internal electrical connections are correct.
All wiring insulation is correct and is not touching a sharp edge.
All Earth connections are electrically and mechanically secure.
All three door safety interlocks are secure and mechanically sound.
The door operation is smooth.
The door activates all three of the door interlock switches in the correct order.
All fuse-holder safety covers are correctly fitted.
Before finishing the service call, recheck the following points:
The oven is electrically safe
All of the electronics are functioning correctly, and all of the touch pads are
working.
The power output of the oven is correct (see pages (8 & 9).
Microwave emission is below permissible limit - 5 mW/cm²
(see BS EN 60335-2-90).
Oven has correct 50mm air gap all round. Air flow should not be restricted.
Page 3 Microcook HD Ovens 32Z3385 Issue 5
Page 4
Product specifications:
Microcook HD Series
Microcook HD1025, HD1425, HD1725, HD1925 & HD2025
Model Number: Model prefix + Type + Voltage + Frequency + UK/Export + Customer
For example: 1925C450UK Model 1925, Microcook, 230-240V, 50Hz, UK model
Model
Type Frequency UK/Export
Voltage
prefix
1025 1425 1725
C= Cook V=Vend
2= 220-230V a.c. 4= 230-240V a.c
1925 2025
Power Requirements
Model HD1025 Model HD1425 Model HD1725 Model HD1925 Model HD2025
Power Output Microwave 100%
External Dimensions
Height Width Depth
Internal Dimensions
Height Width Depth Capacity
Customer
50 = 50 Hz 60 = 60 Hz
UK = UK model EX = Export model
KFC FP = Feastpoint BL = Bourne Leisure
1.75kW
2.60kW
2.88kW
3.12kW
1025W (IEC 705) 1425W (IEC 705) 1725W (IEC 705) 1925W (IEC 705)
475mm (Plus 50mm minimum clearance above) 496mm (Plus 50mm minimum clearance each side) 499mm (Plus 50mm clearance behind)
200mm 390mm 365mm
28.5 Litres ( 1.01ft³)
Weight Nett
Gross packed
Construction Cavity
Casework
Settings Microwave
Timer
42.5kg 45kg
304 Stainless Steel 304 Stainless Steel Coated Aluminium extrusions
100%,50%, Defrost
Up to 10 minutes
Up to 3 cooking stages of up to 10 minutes each Program
Page 4 Microcook HD Ovens 32Z3385 Issue 5
Page 5
Product specifications:
Microcook TA Series
Microcook TA1725 & TA1925
Model Number: Model prefix + Turbo + Voltage + Frequency + Type
Model
prefix
TA1725 TA1925
MT = Manual Turbo VT = Vend Turbo
Power Requirements
Power Output
Power supply lead
External Dimensions
Turbo
TA1725 TA1925
TA1725 Microwave 100% Hot Air Combination TA1925 Microwave 100% Hot Air Combination
TA1725 TA1925
Height Width Depth
Voltage
2= 220-230V a.c. 4= 230-240V a.c
3.12kW
5.50kW ( 3.12kW + 2.38kW )
1725W (IEC 705) 1400W 865W Microwave plus 1400W Hot Air
1925W (IEC 705) 2000W 1925W Microwave plus 2000W Hot Air
13 Amp plug BS 1363A ( UK only ) 2 x 13 Amp plug BS 1363A ( UK only ) or 1 x 30Amp cable with plug BS4343 ( UK only )
475mm (Plus 50 mm minimum clearance above) 496mm (Plus 50 mm minimum clearance each side) 499mm (Plus 50 mm clearance behind)
Frequency
5 = 50 Hz 6 = 60 Hz
Type
UK = UK model EX = Export model
EE = Twin 13amp Lead EX = Single 30 amp Lead
Internal Dimensions
Height Width Depth Capacity
Weight Nett
Gross packed
Construction Cavity
Casework
Settings Microwave
Timer
200mm 390mm 365mm
28.5 Litres ( 1.01ft³)
42.5kg 45kg
304 Stainless Steel 304 Stainless Steel Coated Aluminium extrusions
TA1725 100%,50%, turbo TA1925 100%, heat only, turbo Up to 9 minutes 59 seconds Up to 3 Programmed cooking stages of up to 9 minutes 59 seconds each ( total 29 minutes 57 seconds)
Page 5 Microcook HD Ovens 32Z3385 Issue 5
Page 6
Installation instructions
Power Supply Requirements
The Microcook HD & Microcook TA ovens should be connected to a suitable electricity supply, which can cope with the switching-on surge that occurs with certain types of catering equipment, such as microwaves. Because of this requirement, we strongly recommend that a separate, suitably rated supply is installed for the oven.
The supply for the oven should be fitted with a Type "C" circuit breaker, rated at 16A.
Positioning the Oven
In order to maintain adequate ventilation for air intake and exhaust, and to allow access for cleaning filters, you must allow a minimum of 50mm clearance all around the oven. Air intake temperature should not exceed 35°C - excessive temperature can lead to reduced operating duty cycle or premature ageing of internal components.
NEVER Install an oven above fryers, grills, griddles or any other major heat
source.
NEVER Stack machines on top of each other
ALWAYS Place containers in the cavity carefully - impact damage may chip the
oven shelf.
A – HD2025 Model B – HD1025 Model
Note: The 840mm clearance at the front allows the complete removal of the door for cleaning
Page 6 Microcook HD Ovens 32Z3385 Issue 5
Page 7
Error codes and diagnostics
The Microcook will identify some of the most common problems by flashing an error message code in the time display window.
These are the error messages, and suggestions for repairing them:
All HD & TA Models
Display Fault (frequency) Recommended Action
Door not fully closed
1
(permanent)
Magnetron
2
overheating (Intermittent)
Membrane panel
1
failure (permanent)
2
Membrane panel failure (Intermittent)
Incorrect time set.
3
( Intermittent )
Check the door is fully closed.
Check the door down LED is illuminated on the control board.
Check ribbon connector condition and fit.
Ensure the oven has been installed correctly.
Check the magnetron cooling fan is operating and free from obstruction.
Replace membrane panel.
Replace membrane panel.
Check correct time is set ie : 1.00 minute Not 60 seconds
KFC HD Models (with Fibre Optic Magnetron Detection)
Display Fault (frequency) Recommended Action
LH Magnetron Failure
RH Magnetron Failure
Both magnetrons have failed
Check Power supply Replace magnetron(s)
TA Models
Display Fault (frequency) Recommended Action
1
Convected hot air failure (permanent)
2
Intermittent
Microcook TA
Check full / half wave LED on control board
Check heating element
Page 7 Microcook HD Ovens 32Z3385 Issue 5
Page 8
Procedure A - Power Output Test in accordance with
BS EN 60335-2-90 Annex AA
This test is given in the BSI test standard for microwave ovens. It is reproduced below - not so that you can follow it, but to show you why it is impractical in normal conditions. A simplified procedure, which gives a good approximation to the BSI power output, is given in Procedure B which follows.
Note: This test can only be carried out on a COLD oven. If the oven has been operating, even for only a few seconds, the power given will be lower than the oven rating. This test must also be carried out at a stable voltage - the voltage in most kitchens varies considerably even within the period of the test. If the oven has been operating, go to Procedure B.
You will need:
A thermometer capable of reading to ±0.1°C. A cylindrical borosilicate glass container, 190mm diameter, with a wall thickness of 3mm or less. A calculator. A set of scales capable of reading 1kg to an accuracy of ± 1g. A glass or plastic stirrer. A jug capable of holding over 1litre of water. Drinkable water which is at a temperature of 10°C ± 1°C. A “Variac” or similar variable transformer capable of supplying the oven to ensure a stable voltage.
WARNING: The Borosilicate Glass container has thin walls and is therefore fragile
- take care not to break it during use.
Method
A cylindrical container of borosilicate glass is used for the test. It has a maximum thickness of 3mm, an external diameter of approximately 190mm and a height of approximately 90mm. The mass of the container is determined.
At the start of the test, the oven and the empty container are at ambient temperature. Potable water having an initial temperature of 10°C ± 1°C is used for the test. The temperature of the water is measured immediately before it is poured into the container.
A quantity of 1000g ± 5g of water is added to the container and its actual mass obtained. The container is then immediately placed in the middle of the oven shelf which is in its lowest normal position. The appliance is supplied at rated voltage and operated at the maximum power setting. The time for the water temperature to attain 20°C ± 2°C is measured. The oven is then switched off and the final water temperature is measured within 60’seconds.
NOTES: 1. The water is stirred before its temperature is measured.
2. Stirring and measuring devices are to have a low heat capacity.
The microwave power output is calculated from the formula:
P =
where
P is the microwave power output, in watts; M
is the mass of the water, in grams;
W
M
is the mass of the container, in grams;
C
T
is the ambient temperature, in °C;
0
T
is the initial temperature of the water, in °C;
1
T
is the final temperature of the water, in °C;
2
t is the heating time in seconds, excluding the magnetron filament heat-up time.
4.187 MW (T2-T1) + 0.55 MC (T2-T0)
t
Page 8 Microcook HD Ovens 32Z3385 Issue 5
Page 9
Procedure B - Simplified Power Output Test
You will need:
A thermometer capable of reading to ±0.1°C. A Polypropylene tray approximately 200mm x 200mm. A measuring jug. A calculator. Water which is at a temperature of 10°C ± 2°C.
1 Measure 1 litre of cold water into the tray using the measuring jug. 2 Measure the water temperature, and record it as T[s]. 3 Place the tray on the turntable in the oven and close the door. 4 Turn the oven on. 5 Set the timer to 1:02. 6 Press the “100%” power pad. 7 When the oven bleeps, open the door and remove the tray. 8 Stir the water thoroughly, and measure its temperature. Record this as T[e].
Calculation:
1 T[r] = T[e] - T[s] 2 Power = 70 x T[r]. Power is in Watts
The power given by the above test should be within ±10% of the rated power.
Procedure C - Power Transformer Test
You will need:
A Digital Multi-meter (D.M.M.) A Megger or similar resistance meter using 500V d.c.
1 Isolate the oven from the mains supply.
WARNING: High voltages and large currents are present at the secondary winding and filament
winding of the Power Transformer. It is very dangerous to work near this part when the oven is on. NEVER make any voltage measurements at the High Voltage circuits, including the magnetron filament.
WARNING: Even when the oven is not cooking, the Power Transformer has High Voltages present
because of the Soft Start circuit. Isolate the oven before testing.
2 Ensure that the High Voltage Capacitor is discharged before commencing work. 3 Remove all connections from the Power Transformer. 4 Using a D.M.M., check the continuity of the windings. Results should be as follows:
a Mains winding between tags
b High Voltage winding
c Filament winding
between terminals
Approx. 1.3
Approx. 82
Less than 1
c
b
5 Using a Megger, test the insulation resistance between:
Primary winding and chassis
Filament winding and chassis
One end of the High Voltage winding is connected to the
chassis, so this is not tested.
Pass if over 10 M
Pass if over 10 M
a
Page 9 Microcook HD Ovens 32Z3385 Issue 5
Page 10
Procedure D - High Voltage Capacitor Test
You will need: A Digital Multi-meter (D.M.M.)
A Megger or similar resistance meter using 500V d.c.
WARNING: High voltages and large currents are present at the High Voltage Capacitor. It is very
dangerous to work near this part when the oven is on. NEVER make any voltage measurements at the High Voltage circuits, including the magnetron filament .
WARNING: Even when the oven is not cooking, the High Voltage Capacitor has High Voltages
present because of the Soft Start circuit. Isolate the oven before testing.
1. Isolate the oven from the mains supply.
2. Ensure that the High Voltage Capacitor is discharged before commencing work.
3. Remove all connections from the High Voltage Capacitor.
4. Using a D.M.M., check for continuity between the terminals & compare results with table.
Between Terminals
Between Terminals and Case Pass if open circuit
5. Using a Megger, test the insulation resistance between the terminals and the case.
Between Terminals and Case
Procedure E - High Voltage Rectifier Test
You will need:
A Megger or similar resistance meter using 500V d.c.
WARNING: High voltages and large currents are present at the High Voltage Rectifier. It is very
dangerous to work near this part when the oven is on. NEVER make any voltage
WARNING: Even when the oven is not cooking, the High Voltage Rectifier has High Voltages
1. Isolate the oven from the mains supply.
2. Ensure that the High Voltage Capacitor is
discharged before commencing work.
3. Remove all connections from the High Voltage
Rectifier.
4. Using the Megger, test for continuity in both
directions. Compare results with the table.
measurements at the High Voltage circuits, including the magnetron filament .
present because of the Soft Start circuit. Isolate the oven before testing.
Pass if approximately 10 M
Pass if over 100 M
Open Circuit both ways
Conducts one way only
Short Circuit both ways
Conducts one way, leaks the other
FAIL
PASS
FAIL
FAIL
Procedure F - Magnetron Test
You will need:
A Megger or similar resistance meter using 500V d.c.
A Magnetron can be tested for an open filament or a short circuit by carrying out a continuity check.
1. Isolate the oven from the mains supply.
2. Ensure that the High Voltage Capacitor is discharged before
commencing work.
3. Remove all connections from the Magnetron.
4. A continuity check across the Filament terminals should be 1ohm or less
5. A continuity check between each filament terminal and the
metal outer should read open.
Page 10 Microcook HD Ovens 32Z3385 Issue 5
Page 11
Door interlock operation
The door on the Microcook oven is monitored by three microswitches used in the conventional “Primary, Secondary and Monitor” switch arrangement shown below.
L
Power In
N
The switches operate as follows:
1. Monitor Switch [TopRight]. As the door is closed, the monitor switch is opened.
2. Primary Interlock Switch [ Bottom Left ]. The Primary switch is then closed.
3. Secondary Interlock Switch [ Bottom Right ]. The Secondary Switch then closes.
When the door is opened, the switches operate in the reverse order.
Primary
Door Interlock
Arrangement
Monitor
Secondary
Power
Out
Page 11 Microcook HD Ovens 32Z3385 Issue 5
Page 12
Main features
a c
micro
cook
turbo
aire ll
Vend model (KFC)
d
e
e
f
g
C
C
Description of Features
a. Program Pad
b. On/Off Switch
c. Program Display
d. Program Selection / Time Set Pads
e. Power Selection Pads HD models:100%, 50% & de-frost TA models:100%, hot-air & turbo
f. Time Display
g. Cancel / Callback Pad
h. Door
b
h
Page 12 Microcook HD Ovens 32Z3385 Issue 5
Page 13
Rear cover assembly
1
All other models
HD1025 only Rear View
5
Outer View
Inner View
2
1
5
3
7 6
No Description HD1025 HD1425 HD1725 HD1925 HD2025 TA
1 Rear Cover 40M0883 11M0269 11M0269 11M0269 11M0270 11M0269 2 Push Fit Feet —– 31Z1187 31Z1187 31Z1187 31Z1187 31Z1187
3 Air filter —– 31Z1104 31Z1104 31Z1104 31Z1104 31Z1104 4a Screw M5x16 31Z3022 31Z3022 31Z3022 31Z3022 31Z3022 31Z3022 4b M5 Star Washer 31Z5012 31Z5012 31Z5012 31Z5012 31Z5012 31Z5012
5 Installation Label 31Z2071 31Z2071 31Z2071 31Z2071 31Z2071 31Z2071
6 Self Adhesive Foam Tape —– 31Z0158 31Z0158 31Z0158 31Z0158 31Z0158
7 Service History Label 31Z2056 31Z2056 31Z2056 31Z2056 31Z2056 31Z2056
Page 13 Microcook HD Ovens 32Z3385 Issue 5
Page 14
Die–cast door ( 500mm ) assembly 11M0302
9
13
12
14
24 22
15
16 21 20
11 13
23
18
17
19
Note: Parts 18 & 19 choke filler are now one piece Except on HD2025 model
No Description HD1025 HD1425 HD1725 HD1925 HD2025 TA
8* Door Assembly 11M0302 11M0302 11M0302 11M0302 11M0258 11M0302
9* Door Screen Blue 40M0923 40M0923 40M0923 40M0923 40M0858 40M0923 10 Double Sided Tape 30Z0477 30Z0477 30Z0477 30Z0477 —– 30Z0477 11 Doorside L/H 40M0919 40M0919 40M0919 40M0919 40M0801 40M0919 12 Doorside R/H 40M0920 40M0920 40M0920 40M0920 40M0802 40M0920 13 Fixing Nut (M5) 31Z4013 31Z4013 31Z4013 31Z4013 31Z4013 31Z4013 14 Fixing Bolt (M5 x 16) 31Z3022 31Z3022 31Z3022 31Z3022 31Z3022 15 Door Main Body 40M0839 40M0839 40M0839 40M0839 40M0855 40M0839 16 Door Mesh 40M0841 40M0841 40M0841 40M0841 40M0860 40M0841 17 Door Choke 40M0840 40M0840 40M0840 40M0840 —– 40M0840 18 Choke Filler Horizontal 19 Choke Filler Vertical 40M0747 20 Inner Door Glass 20Z1075 20Z1075 20Z1075 20Z1075 40M0859 20Z1075 21 Silicone Sealant (White) 31Z0098 31Z0098 31Z0098 31Z0098 31Z0098 31Z0098 22 Door Seal Horizontal 40M0927 40M0927 40M0927 40M0927 40M0861 40M0927 23 Door Seal Vertical 40M0926 40M0926 40M0926 40M0926 2070499 40M0926 24 Loctite Gel 32Z5005 32Z5005 32Z5005 32Z5005 32Z5005 32Z5005
40M0931 40M0931 40M0931 40M0931
40M0862
40M0931
*Note: KFC see Appendix 1
Page 14 Microcook HD Ovens 32Z3385 Issue 5
Page 15
Door ( 650mm ) assembly 11M0258
22
19
23
12
16
16
25
27 26
37 33 36
11 26 33 13 35 15 35 13
29
9
32
30
31
No Description HD1025 HD1425 HD1725 HD1925 HD2025 TA
9 Door Screen Blue 40M0923 40M0923 40M0923 40M0923 40M0858 40M0923 11 Doorside L/H 40M0919 40M0919 40M0919 40M0919 40M0801 40M0919 12 Doorside R/H 40M0920 40M0920 40M0920 40M0920 40M0802 40M0920 13 Fixing Nut (M5) 31Z4013 31Z4013 31Z4013 31Z4013 31Z4013 31Z4013 14 Fixing Bolt (M5 x 16) 31Z3022 31Z3022 31Z3022 31Z3022 31Z3022 15 Door Main Body 40M0839 40M0839 40M0839 40M0839 40M0855 40M0839 16 Door Mesh 40M0841 40M0841 40M0841 40M0841 40M0860 40M0841 17 Door Choke 40M0840 40M0840 40M0840 40M0840 —– 40M0840 18 Choke Filler Horizontal 19 Choke Filler Vertical 40M0747 20 Inner Door Glass 20Z1075 20Z1075 20Z1075 20Z1075 40M0859 20Z1075 21 Silicone Sealant (White) 31Z0098 31Z0098 31Z0098 31Z0098 31Z0098 31Z0098 22 Door Seal Horizontal 40M0927 40M0927 40M0927 40M0927 40M0861 40M0927 23 Door Seal Vertical 40M0926 40M0926 40M0926 40M0926 20Z0499 40M0926 24 Loctite Gel 32Z5005 32Z5005 32Z5005 32Z5005 32Z5005 32Z5005 25 Door Mesh Spring (Vertical) —– —– —– —– 20Z0338 —– 26 Door Mesh Spring (Horizontal) —– —– —– —– 40M0863 —– 27 Door Packer —– —– —– —– 20Z0488 —– 28 Tessa Tape 31Z0042 31Z0042 31Z0042 31Z0042 31Z0042 31Z0042 29 Top Door Trim —– —– —– —– 40M0856 —– 30 Door Handle —– —– —– —– 40M0857 —– 31 Handle End Cap L/H —– —– —– —– 40M0523 —– 32 Handle End Cap R/H —– —– —– —– 40M0524 —– 33 M6 Full Nut —– —– —– —– 31Z4009 —– 35 M5 Flat Washer —– —– —– —– 31Z5008 —– 36 M5 Shakeproof Washer —– —– —– —– 31Z5012 —– 37 M5 x 16 Pan Head Screw —– —– —– —– 31Z3022 —–
40M0931 40M0931 40M0931 40M0931
40M0862
40M0931
Page 15 Microcook HD Ovens 32Z3385 Issue 5
Page 16
s
l
n
a
e
p
n
t
C
o
See Appendix 6 for Logic Board connections and jumper details
a
r
o
l
m
s
s
e
F
o
(
b
y
l
m
r
K
F
C
s
o
d
e
l
p
e
e
A
p
1
e
)
n
d
i
x
38
39
40
44
43
42
41
No Description All Models
40 Electrostatic Screen 40M0464
41 Ribbon Connector (10 Way) 11M0117
42 Filtered Wire Assembly 11M0333
43 M4 Nylon Face Nut 31Z4014
44 M3 x 12 Hex Head 31Z3117
No. Description Colour HD1425
9 Door screen Red/Grey 40M0923 40M0858 40M0923 40M0923
9 Door screen Blue 40M1053 40M1054 40M1053 40M1053
38 Switch Panel Assy Red/Grey 11M0108 11M0110 11M0299 11M0395
38 Switch Panel Assy Blue 11M0387 11M0388 11M0386 11M0395
39 Logic Board ——— 11M0107 11M0107 11M0359 11M0359
49 PCB relay ——— 11M0427 11M0427 11M0430 11M0430
50 Fan Control PCB ——— ——— ——— 11M0261 11M0261
HD1025
HD1925
40M0923
40M1053
11M0108
11M0387
11M0107
11M0285
———
HD2025 TA1725 TA1925
Page 16 Microcook HD Ovens 32Z3385 Issue 5
Page 17
Component layout: HD1025
73
68a
68b
69
64
61
52
48
58
56
59 62
65
67
66
70
63
54
51
53
52
49
55
No Description HD1025 HD1425 HD1725 HD1925 HD2025 TA
48 Cavity 10M0026 10M0026 10M0026 10M0026 10M0102 10M0106 49 Relay Board 11M0285 11M0427 11M0427 11M0427 11M0427 11M0430 50 Fan Control Pcb —– —– —– —– —– 11M0261 51 PCB Stand-off 31Z7010 31Z7010 31Z7010 31Z7010 31Z7010 31Z7010 52 Door Spring Kit 11M0353 11M0353 11M0353 11M0353 11M0354 11M0353 53 Transformer 30Z0992 30Z0992 30Z0992 30Z0992 30Z0992 30Z0992 54 Transformer Spacer 20Z0787 20Z0787 20Z0787 20Z0787 20Z0787 20Z0787 55 Safe Edge Cover 40M0614 40M0614 40M0614 40M0614 40M0614 40M0614 56 Capacitor Clip 40H0046 40M0600 40M0600 40M0600 40M0600 40M0889 57 Capacitor L/H 58 Capacitor R/H 59 Protective Boot 31Z0167 31Z0167 31Z0167 31Z0167 31Z0167 31Z0167 60 Nomex Cover —– 40M0973 40M0973 40M0973 40M0973 —– 61 Magnetron Cooling Fan 30Z0921 30Z0270 30Z0270 30Z0270 30Z0270 30Z0270 62 Thermal Trip ( Magnetron ) 25Z1016 30Z0257 30Z0257 30Z0257 30Z0257 30Z0257 63 Magnetron 64 Cold Air Duct 40M0884 40M0544 40M0544 40M0544 40M0544 40M0544 65 Diode Assembly 11M0343 11M0343 11M0343 11M0343 11M0343 11M0343 66 Delta Filter 31Z0126 31Z0126 31Z0126 31Z0126 31Z0126 31Z0126
67 Air Outlet Duct 40M0509 40M0509 40M0509 40M0509 40M0509 40M0509 68a Fuse Holder 30Z0231 30Z0231 30Z0231 30Z0231 30Z0231 30Z0231 68b Fuse 30Z0168 30Z0168 30Z0168 30Z0168 30Z0168 30Z0168
68c Fuse Cover 20Z1080 20Z1080 20Z1080 20Z1080 20Z1080 20Z1080
69 Thermal Trip ( Oven ) 30Z1011 30Z1011 30Z1011 30Z1011 30Z1011 30Z1011
70 Gold Resistor 30Z0283 30Z0283 30Z0283 30Z0283 30Z0283 30Z0283
71 Axial Fan —– 30Z0941 30Z0941 30Z0941 30Z0941 30Z0941
72 Axial Fan Bracket —– 40M0541 40M0541 40M0541 40M0541 40M0541
73 Mains Filter 30Z0997 30Z0997 30Z0997 30Z0997 30Z0997 30Z0997
74 Lampshield 40M0492 40M0492 40M0492 40M0492 40M0492 40M0872
See Appendix 2
See Appendix 2
Page 17 Microcook HD Ovens 32Z3385 Issue 5
Page 18
Component layout: HD1425 & HD1725
71
74
67
63
66
54
52
62
65
59
70
60
61
65
73
68a
68b
68c
56
69
58
57
52
53
49 48 55
51
No Description HD1025 HD1425 HD1725 HD1925 HD2025 TA
48 Cavity 10M0026 10M0026 10M0026 10M0026 10M0102 10M0106
49 Relay Board 11M0285 11M0427 11M0427 11M0427 11M0427 11M0430
50 Fan Control Pcb —– —– —– —– —– 11M0261
51 PCB Stand-off 31Z7010 31Z7010 31Z7010 31Z7010 31Z7010 31Z7010
52 Door Spring Kit 11M0353 11M0353 11M0353 11M0353 11M0354 11M0353
53 Transformer 30Z0992 30Z0992 30Z0992 30Z0992 30Z0992 30Z0992
54 Transformer Spacer 20Z0787 20Z0787 20Z0787 20Z0787 20Z0787 20Z0787
55 Safe Edge Cover 40M0614 40M0614 40M0614 40M0614 40M0614 40M0614
56 Capacitor Clip 40H0046 40M0600 40M0600 40M0600 40M0600 40M0889
57 Capacitor L/H
58 Capacitor R/H
59 Protective Boot 31Z0167 31Z0167 31Z0167 31Z0167 31Z0167 31Z0167
60 Nomex Cover —– 40M0973 40M0973 40M0973 40M0973 —–
61 Magnetron Cooling Fan 30Z0921 30Z0270 30Z0270 30Z0270 30Z0270 30Z0270
62 Thermal Trip ( Magnetron ) 25Z1016 30Z0257 30Z0257 30Z0257 30Z0257 30Z0257
63 Magnetron
64 Cold Air Duct 40M0884 40M0544 40M0544 40M0544 40M0544 40M0544
65 Diode Assembly 11M0343 11M0343 11M0343 11M0343 11M0343 11M0343
66 Delta Filter 31Z0126 31Z0126 31Z0126 31Z0126 31Z0126 31Z0126
67 Air Outlet Duct 40M0509 40M0509 40M0509 40M0509 40M0509 40M0509 68a Fuse Holder 30Z0231 30Z0231 30Z0231 30Z0231 30Z0231 30Z0231 68b Fuse 30Z0168 30Z0168 30Z0168 30Z0168 30Z0168 30Z0168
68c Fuse Cover 20Z1080 20Z1080 20Z1080 20Z1080 20Z1080 20Z1080
69 Thermal Trip ( Oven ) 30Z1011 30Z1011 30Z1011 30Z1011 30Z1011 30Z1011
70 Gold Resistor 30Z0283 30Z0283 30Z0283 30Z0283 30Z0283 30Z0283
71 Axial Fan —– 30Z0941 30Z0941 30Z0941 30Z0941 30Z0941
72 Axial Fan Bracket —– 40M0541 40M0541 40M0541 40M0541 40M0541
73 Mains Filter 30Z0997 30Z0997 30Z0997 30Z0997 30Z0997 30Z0997
74 Lampshield 40M0492 40M0492 40M0492 40M0492 40M0492 40M0872
See Appendix 2
See Appendix 2
Page 18 Microcook HD Ovens 32Z3385 Issue 5
Page 19
Component layout: HD1925 (For KFC see Appendix 1 )
71 62
65
74
67
63
66
54
53
59
70
60
61
73
68a
68b
68c
56
65
69
58
57
52
48 55 52
49
51
No Description HD1025 HD1425 HD1725 HD1925 HD2025 TA
48 Cavity 10M0026 10M0026 10M0026 10M0026 10M0102 10M0106
49 Relay Board 11M0285 11M0427 11M0427 11M0427 11M0427 11M0430
50 Fan Control Pcb —– —– —– —– —– 11M0261
51 PCB Stand-off 31Z7010 31Z7010 31Z7010 31Z7010 31Z7010 31Z7010
52 Door Spring Kit 11M0353 11M0353 11M0353 11M0353 11M0354 11M0353
53 Transformer 30Z0992 30Z0992 30Z0992 30Z0992 30Z0992 30Z0992
54 Transformer Spacer 20Z0787 20Z0787 20Z0787 20Z0787 20Z0787 20Z0787
55 Safe Edge Cover 40M0614 40M0614 40M0614 40M0614 40M0614 40M0614
56 Capacitor Clip 40H0046 40M0600 40M0600 40M0600 40M0600 40M0889
57 Capacitor L/H
58 Capacitor R/H
59 Protective Boot 31Z0167 31Z0167 31Z0167 31Z0167 31Z0167 31Z0167
60 Nomex Cover —– 40M0973 40M0973 40M0973 40M0973 —–
61 Magnetron Cooling Fan 30Z0921 30Z0270 30Z0270 30Z0270 30Z0270 30Z0270
62 Thermal Trip ( Magnetron ) 25Z1016 30Z0257 30Z0257 30Z0257 30Z0257 30Z0257
63 Magnetron
64 Cold Air Duct 40M0884 40M0544 40M0544 40M0544 40M0544 40M0544
65 Diode Assembly 11M0343 11M0343 11M0343 11M0343 11M0343 11M0343
66 Delta Filter 31Z0126 31Z0126 31Z0126 31Z0126 31Z0126 31Z0126
67 Air Outlet Duct 40M0509 40M0509 40M0509 40M0509 40M0509 40M0509 68a Fuse Holder 30Z0231 30Z0231 30Z0231 30Z0231 30Z0231 30Z0231 68b Fuse 30Z0168 30Z0168 30Z0168 30Z0168 30Z0168 30Z0168
68c Fuse Cover 20Z1080 20Z1080 20Z1080 20Z1080 20Z1080 20Z1080
69 Thermal Trip ( Oven ) 30Z1011 30Z1011 30Z1011 30Z1011 30Z1011 30Z1011
70 Gold Resistor 30Z0283 30Z0283 30Z0283 30Z0283 30Z0283 30Z0283
71 Axial Fan —– 30Z0941 30Z0941 30Z0941 30Z0941 30Z0941
72 Axial Fan Bracket —– 40M0541 40M0541 40M0541 40M0541 40M0541
73 Mains Filter 30Z0997 30Z0997 30Z0997 30Z0997 30Z0997 30Z0997
74 Lampshield 40M0492 40M0492 40M0492 40M0492 40M0492 40M0872
*Note: KFC see Appendix 1
See Appendix 2
See Appendix 2
Page 19 Microcook HD Ovens 32Z3385 Issue 5
Page 20
Component layout: HD2025
71
67
63
68a
68b
68c
54
62
70 59 66
60
61
58
57
56
74
69
65
55 48 52 49 53
52 51
No Description HD1025 HD1425 HD1725 HD1925 HD2025 TA
48 Cavity 10M0026 10M0026 10M0026 10M0026 10M0102 10M0106
49 Relay Board 11M0285 11M0427 11M0427 11M0427 11M0427 11M0430
50 Fan Control Pcb —– —– —– —– —– 11M0261
51 PCB Stand-off 31Z7010 31Z7010 31Z7010 31Z7010 31Z7010 31Z7010
52 Door Spring Kit 11M0353 11M0353 11M0353 11M0353 11M0354 11M0353
53 Transformer 30Z0992 30Z0992 30Z0992 30Z0992 30Z0992 30Z0992
54 Transformer Spacer 20Z0787 20Z0787 20Z0787 20Z0787 20Z0787 20Z0787
55 Safe Edge Cover 40M0614 40M0614 40M0614 40M0614 40M0614 40M0614
56 Capacitor Clip 40H0046 40M0600 40M0600 40M0600 40M0600 40M0889
57 Capacitor L/H
58 Capacitor R/H
59 Protective Boot 31Z0167 31Z0167 31Z0167 31Z0167 31Z0167 31Z0167
60 Nomex Cover —– 40M0973 40M0973 40M0973 40M0973 —–
61 Magnetron Cooling Fan 30Z0921 30Z0270 30Z0270 30Z0270 30Z0270 30Z0270
62 Thermal Trip ( Magnetron ) 25Z1016 30Z0257 30Z0257 30Z0257 30Z0257 30Z0257
63 Magnetron
64 Cold Air Duct 40M0884 40M0544 40M0544 40M0544 40M0544 40M0544
65 Diode Assembly 11M0343 11M0343 11M0343 11M0343 11M0343 11M0343
66 Delta Filter 31Z0126 31Z0126 31Z0126 31Z0126 31Z0126 31Z0126
67 Air Outlet Duct 40M0509 40M0509 40M0509 40M0509 40M0509 40M0509 68a Fuse Holder 30Z0231 30Z0231 30Z0231 30Z0231 30Z0231 30Z0231 68b Fuse 30Z0168 30Z0168 30Z0168 30Z0168 30Z0168 30Z0168
68c Fuse Cover 20Z1080 20Z1080 20Z1080 20Z1080 20Z1080 20Z1080
69 Thermal Trip ( Oven ) 30Z1011 30Z1011 30Z1011 30Z1011 30Z1011 30Z1011
70 Gold Resistor 30Z0283 30Z0283 30Z0283 30Z0283 30Z0283 30Z0283
71 Axial Fan —– 30Z0941 30Z0941 30Z0941 30Z0941 30Z0941
72 Axial Fan Bracket —– 40M0541 40M0541 40M0541 40M0541 40M0541
73 Mains Filter 30Z0997 30Z0997 30Z0997 30Z0997 30Z0997 30Z0997
74 Lampshield 40M0492 40M0492 40M0492 40M0492 40M0492 40M0872
See Appendix 2
See Appendix 2
Page 20 Microcook HD Ovens 32Z3385 Issue 5
Page 21
Component layout: TA1725 & TA1925
56
74
65
58
63
54
71
70
61
73
68a
68b
68c
62
57
49
55 53
50 52
51 52
No Description HD1025 HD1425 HD1725 HD1925 HD2025 TA
48 Cavity 10M0026 10M0026 10M0026 10M0026 10M0102 10M0106
49 Relay Board 11M0285 11M0427 11M0427 11M0427 11M0427 11M0430
50 Fan Control Pcb —– —– —– —– —– 11M0261
51 PCB Stand-off 31Z7010 31Z7010 31Z7010 31Z7010 31Z7010 31Z7010
52 Door Spring Kit 11M0353 11M0353 11M0353 11M0353 11M0354 11M0353
53 Transformer 30Z0992 30Z0992 30Z0992 30Z0992 30Z0992 30Z0992
54 Transformer Spacer 20Z0787 20Z0787 20Z0787 20Z0787 20Z0787 20Z0787
55 Safe Edge Cover 40M0614 40M0614 40M0614 40M0614 40M0614 40M0614
56 Capacitor Clip 40H0046 40M0600 40M0600 40M0600 40M0600 40M0889*
57 Capacitor L/H
58 Capacitor R/H
59 Protective Boot 31Z0167 31Z0167 31Z0167 31Z0167 31Z0167 31Z0167
60 Nomex Cover —– 40M0973 40M0973 40M0973 40M0973 —–
61 Magnetron Cooling Fan 30Z0921 30Z0270 30Z0270 30Z0270 30Z0270 30Z0270
62 Thermal Trip ( Magnetron ) 25Z1016 30Z0257 30Z0257 30Z0257 30Z0257 30Z0257
63 Magnetron
64 Cold Air Duct 40M0884 40M0544 40M0544 40M0544 40M0544 40M0544
65 Diode Assembly 11M0343 11M0343 11M0343 11M0343 11M0343 11M0343
66 Delta Filter 31Z0126 31Z0126 31Z0126 31Z0126 31Z0126 31Z0126
67 Air Outlet Duct 40M0509 40M0509 40M0509 40M0509 40M0509 40M0509 68a Fuse Holder 30Z0231 30Z0231 30Z0231 30Z0231 30Z0231 30Z0231 68b Fuse 30Z0168 30Z0168 30Z0168 30Z0168 30Z0168 30Z0168
68c Fuse Cover 20Z1080 20Z1080 20Z1080 20Z1080 20Z1080 20Z1080
69 Thermal Trip ( Oven ) 30Z1011 30Z1011 30Z1011 30Z1011 30Z1011 30Z1011
70 Gold Resistor 30Z0283 30Z0283 30Z0283 30Z0283 30Z0283 30Z0283
71 Axial Fan —– 30Z0941 30Z0941 30Z0941 30Z0941 30Z0941
72 Axial Fan Bracket —– 40M0541 40M0541 40M0541 40M0541 40M0541
73 Mains Filter 30Z0997 30Z0997 30Z0997 30Z0997 30Z0997 30Z0997
74 Lampshield 40M0492 40M0492 40M0492 40M0492 40M0492 40M0872
See Appendix 2
See Appendix 2
* also requires clip anchor 40M0888
Page 21 Microcook HD Ovens 32Z3385 Issue 5
Page 22
Cavity components
82
80
79
81
80
77
No Description HD1025 HD1425 HD1725 HD1925 HD2025 TA
77 Ceramic Base 20Z1355 20Z1355 20Z1355 20Z1355 40M0853 20Z1355 78 White Silastic 31Z0098 31Z0098 31Z0098 31Z0098 31Z0098 31Z0098 79 Roof 40M0563 40M0563 40M0563 40M0563 40M0563 40M0877 80 Stirrer Blade Assembly 11M0140 11M0140 11M0140 11M0140 11M0140 11M0140 81 Box Launch Seal 40M0832 40M0832 40M0832 40M0832 40M0832 40M0832 82 Tuning Stub 40M0508 40M0508 40M0508 40M0508 40M0539 40M0508
Page 22 Microcook HD Ovens 32Z3385 Issue 5
Page 23
Door opening mechanism: Right side
HD1025 & HD1925 KFC models are fitted with Manual Doors and do not have the Pop-up door solenoid assembly.
86
96
97
90
92
91
95
97
95 97
No Description HD1025 HD1425 HD1725 HD1925 HD2025 TA
85 Door Guide Moulding L/H 20Z0310 20Z0310 20Z0310 20Z0310 20Z0310 20Z0310 86 Door Guide Moulding R/H 20Z0309 20Z0309 20Z0309 20Z0309 20Z0309 20Z0309 87 Solenoid Fixing Screw 31Z3013 31Z3013 31Z3013 31Z3013 31Z3013 31Z3013 88 Solenoid Fixing Washer 31Z5012 31Z5012 31Z5012 31Z5012 31Z5012 31Z5012 89 Door Solenoid (L/H) 30Z0284 30Z0284 30Z0284 30Z0284 30Z0284 30Z0284 90 Door Solenoid (R/H) 30Z0010 30Z0010 30Z0010 30Z0010 30Z0010 30Z0010 91 Solenoid Cork Washer 20Z0710 20Z0710 20Z0710 20Z0710 20Z0710 20Z0710 92 Solenoid Plunger —– 20Z0970 20Z0970 20Z0970 20Z0970 20Z0970 93 Moulded Rubber Stop —– 31Z1002 31Z1002 31Z1002 31Z1002 31Z1002 94 Moulded Rubber Stop Fixing Screw —– 31Z3012 31Z3012 31Z3012 31Z3012 31Z3012 95 Microswitch (Straight Arm) 30Z0240 30Z0240 30Z0240 30Z0240 30Z0240 30Z0240 96 Microswitch (Monitor) 30Z0356 30Z0356 30Z0356 30Z0356 30Z0356 30Z0356 97 Microswitch Insulation Pad 31Z0115 31Z0115 31Z0115 31Z0115 31Z0115 31Z0115 98 Microswitch Fixing Screw 31Z3027 31Z3027 31Z3027 31Z3027 31Z3027 31Z3027 99 Microswitch Fixing Washer 31Z5018 31Z5018 31Z5018 31Z5018 31Z5018 31Z5018
100 Microswitch Fixing Nut 31Z4000 31Z4000 31Z4000 31Z4000 31Z4000 31Z4000
Page 23 Microcook HD Ovens 32Z3385 Issue 5
Page 24
Door opening mechanism: Left side
HD1025 & HD1925 KFC models are fitted with Manual Doors and do not have the Pop-up door solenoid assembly.
85
89
92 91
95
No Description HD1025 HD1425 HD1725 HD1925 HD2025 TA
85 Door Guide Moulding L/H 20Z0310 20Z0310 20Z0310 20Z0310 20Z0310 20Z0310 86 Door Guide Moulding R/H 20Z0309 20Z0309 20Z0309 20Z0309 20Z0309 20Z0309 87 Solenoid Fixing Screw 31Z3013 31Z3013 31Z3013 31Z3013 31Z3013 31Z3013 88 Solenoid Fixing Washer 31Z5012 31Z5012 31Z5012 31Z5012 31Z5012 31Z5012 89 Door Solenoid (L/H) 30Z0284 30Z0284 30Z0284 30Z0284 30Z0284 30Z0284 90 Door Solenoid (R/H) 30Z0010 30Z0010 30Z0010 30Z0010 30Z0010 30Z0010 91 Solenoid Cork Washer 20Z0710 20Z0710 20Z0710 20Z0710 20Z0710 20Z0710 92 Solenoid Plunger —– 20Z0970 20Z0970 20Z0970 20Z0970 20Z0970 93 Moulded Rubber Stop —– 31Z1002 31Z1002 31Z1002 31Z1002 31Z1002 94 Moulded Rubber Stop Fixing Screw —– 31Z3012 31Z3012 31Z3012 31Z3012 31Z3012 95 Microswitch (Straight Arm) 30Z0240 30Z0241 30Z0242 30Z0243 30Z0244 30Z0245 96 Microswitch (Monitor) 30Z0356 30Z0356 30Z0356 30Z0356 30Z0356 30Z0356 97 Microswitch Insulation Pad 31Z0115 31Z0115 31Z0115 31Z0115 31Z0115 31Z0115 98 Microswitch Fixing Screw 31Z3027 31Z3027 31Z3027 31Z3027 31Z3027 31Z3027 99 Microswitch Fixing Washer (Flat) 31Z5018 31Z5018 31Z5018 31Z5018 31Z5018 31Z5018
100 Microswitch Fixing Nut 31Z4000 31Z4000 31Z4000 31Z4000 31Z4000 31Z4000
Page 24 Microcook HD Ovens 32Z3385 Issue 5
Page 25
TA 1725 and TA 1925: Turboaire hot air motor assembly
83
79
84
No Description HD1025 HD1425 HD1725 HD1925 HD2025 TA
77 Ceramic Base 20Z1355 20Z1355 20Z1355 20Z1355 40M0853 20Z1355 78 White Silastic 31Z0098 31Z0098 31Z0098 31Z0098 31Z0098 31Z0098 79 Roof 40M0563 40M0563 40M0563 40M0563 40M0563 40M0877 80 Stirrer Blade Assembly 11M0140 11M0140 11M0140 11M0140 11M0140 11M0140 82 Tuning Stub 40M0508 40M0508 40M0508 40M0508 40M0539 40M0508 83 Hot Air Motor Assembly —– —– —– —– —– 11M0344 84 Cooling Sleeve —– —– —– —– —– 40M0878
Page 25 Microcook HD Ovens 32Z3385 Issue 5
Page 26
TA 1725 and TA 1925 Fan control PCB – part no. 11M0261
This board provides a full temperature-control system for the Turboaire Hot Air Fan, this will need to be set up in accordance with the following procedure once replaced. It also monitors the Fan Motor performance, and sends a signal to the logic PCB Assembly to indicate that it is functioning correctly. The status of the various functions are indicated by the monitor LEDs.
Thermocouple Sensor Input
When power is connected to the oven, the “Sensor Error” LED (D6) should not illuminate. If this happens, there is a bad connection or a broken wire in the thermocouple sensor. Using a suitably insulated pair of long nose pliers, short the + & - terminals together (D6) should then go out. If this does not happen the PCB is faulty and requires replacing.
Thermocouple Operation
Using a multimeter set to read in excess of 1V dc ,connect the black lead to the pin marked “GND” and the red lead to the pin marked “T+”. A reading in millivolts of ten times the nozzle temperature should be obtained:
If the nozzle is at 22.0 C, then the reading should be 220mV If the nozzle is at 19.2 C, then the reading should be 192mV
Page 26 Microcook HD Ovens 32Z3385 Issue 5
Page 27
TA 1725 and TA 1925: PCB board operation during oven use
The operation of this PCB is best tested when the oven is in operation. You will need to have a pen and paper to hand in order to set up the Nozzle temperature. (see Adjusting the nozzle temperature below for further details).
Initial Status of PCB Monitor LEDs
When the oven is turned on, the status of the LEDs on the PCB are as follows:
D1 Fan OK Off D4 Motor On Off D6 Sensor Error Off D7 Full / Half On
If any of the LEDs are not as above check all connections to the PCB.
Adjusting the nozzle temperature
Setting the nozzle temperature should be carried out prior to all microwave tests, or should be carried out on an oven which has been turned off for at least one hour. If this is not possible, or if the oven does not function in Turbo mode, proceed to the next section.
1. Place a water load of at least 500ml in a suitable heatproof container into the cavity.
2. Measure the voltage between the Set Temp pin and GND pin with a multimeter set to read at least 10Vdc. Adjust VR1 clockwise until the reading exceeds 7.5V.
3. Program the TA Oven for 3 minutes in Turbo mode on pad 0.
4. Measure the voltage between the T+ pin and GND pin.
This should indicate the ambient temperature.
5. With the meter still attached, press pad 0. When the oven time display indicates 2:48, note the voltage reading. This should be between 2.0V and 7.5V. Press the Cancel Pad.
6. Measure the voltage between the Set Temp pin and GND pin, and adjust VR1 until the meter reads the same as the reading obtained above.
7. Press Pad 0 again , and verify that the Half / Full LED (D7) switches on and off during the cooking cycle.
Note : The above setting up procedure must be carried out on a cold oven , as the
oven will not cook correctly if carried out on a warm oven.
Do not carry out this procedure on a warm oven.
Operation of LEDs during Turbo cooking
On completion of the above procedure, a functional test of the PCB should be made and operation of the LEDs observed.
1. Place a water load of at least 500ml in a suitable heatproof container into the cavity.
2. Program the TA oven for 3 minutes in Turbo mode on pad 9.
3. Press pad 9. The oven should begin to cook and the Motor On LED should light.
4. After about 1-2 seconds, the Fan Ok LED should light .This allows the heater element to work.
5. Within 10 – 20 seconds, the Full / Half LED should go out. This should switch on and off during the cooking cycle.
6. When the time display shows 0:10 the heater element should switch off, which should result in a change of pitch in the noise from the fan. This completes the operational test.
Page 27 Microcook HD Ovens 32Z3385 Issue 5
Page 28
Input wiring details
L2
U
U
Blue
Blue
N
73
68A
68B 68C
Green / Yellow
Brown
101
102
102
Model HD1025
Model HD2025
No Description HD1025 HD1425 HD1725 HD1925 HD2025 TA
68a Fuse Holder 30Z0231 30Z0231 30Z0231 30Z0231 30Z0231 30Z0231 68b Fuse 30Z0168 30Z0168 30Z0168 30Z0168 30Z0168 30Z0168
68c Fuse Cover 20Z1080 20Z1080 20Z1080 20Z1080 20Z1080 20Z1080
73 Mains Filter 30Z0997 30Z0997 30Z0997 30Z0997 30Z0997 30Z0997 101 Sleeve 89W6010 89W6010 89W6010 89W6010 89W6010 89W6010 102 Clip 31Z7052 31Z7052 31Z7052 31Z7052 31Z7052 31Z7052
Page 28 Microcook HD Ovens 32Z3385 Issue 5
Page 29
Part number identification chart:
No Description HD1025 HD1425 HD1725 HD1925 HD2025 TA
1 Rear Cover 40M0883 11M0269 11M0269 11M0269 11M0270 11M0269 2 Push Fit Feet —– 31Z1187 31Z1187 31Z1187 31Z1187 31Z1187
3 Air filter —– 31Z1104 31Z1104 31Z1104 31Z1104 31Z1104 4a Screw M5x16 31Z3022 31Z3022 31Z3022 31Z3022 31Z3022 31Z3022 4b M5 Star Washer 31Z5012 31Z5012 31Z5012 31Z5012 31Z5012 31Z5012
5 Installation Label 31Z2071 31Z2071 31Z2071 31Z2071 31Z2071 31Z2071
6 Self Adhesive Foam Tape —– 31Z0158 31Z0158 31Z0158 31Z0158 31Z0158
7 Service History Label 31Z2056 31Z2056 31Z2056 31Z2056 31Z2056 31Z2056
8 Door Assembly 11M0302 11M0302 11M0302 11M0302 11M0258 11M0302
9 Door Screen 40M0923 40M0923 40M0923 40M0923 40M0858 40M0923 10 Double Sided Tape 30Z0477 30Z0477 30Z0477 30Z0477 —– 30Z0477 11 Doorside L/H 40M0919 40M0919 40M0919 40M0919 40M0801 40M0919 12 Doorside R/H 40M0920 40M0920 40M0920 40M0920 40M0802 40M0920 13 Fixing Nut (M5) 31Z4013 31Z4013 31Z4013 31Z4013 31Z4013 31Z4013 14 Fixing Bolt (M5 x 16) 31Z3022 31Z3022 31Z3022 31Z3022 31Z3022 15 Door Main Body 40M0839 40M0839 40M0839 40M0839 40M0855 40M0839 16 Door Mesh 40M0841 40M0841 40M0841 40M0841 40M0860 40M0841 17 Door Choke 40M0840 40M0840 40M0840 40M0840 —– 40M0840 18 Choke Filler Horizontal 19 Choke Filler Vertical 40M0747 20 Inner Door Glass 20Z1075 20Z1075 20Z1075 20Z1075 40M0859 20Z1075 21 Silicone Sealant (White) 31Z0098 31Z0098 31Z0098 31Z0098 31Z0098 31Z0098 22 Door Seal Horizontal 40M0927 40M0927 40M0927 40M0927 40M0861 40M0927 23 Door Seal Vertical 40M0926 40M0926 40M0926 40M0926 20Z0499 40M0926 24 Loctite Gel 32Z5005 32Z5005 32Z5005 32Z5005 32Z5005 32Z5005 25 Door Mesh Spring (Vertical) —– —– —– —– 20Z0338 —– 26 Door Mesh Spring (Horizontal) —– —– —– —– 40M0863 —– 27 Door Packer —– —– —– —– 20Z0488 —– 28 Tessa Tape 31Z0042 31Z0042 31Z0042 31Z0042 31Z0042 31Z0042 29 Top Door Trim —– —– —– —– 40M0856 —– 30 Door Handle —– —– —– —– 40M0857 —– 31 Handle End Cap L/H —– —– —– —– 40M0523 —– 32 Handle End Cap R/H —– —– —– —– 40M0524 —– 33 M6 Full Nut —– —– —– —– 31Z4009 —– 35 M5 Flat Washer —– —– —– —– 31Z5008 —– 36 M5 Shakeproof Washer —– —– —– —– 31Z5012 —– 37 M5 x 16 Pan Head Screw —– —– —– —– 31Z3022 —– 38 Switch Panel Ass 11M0108 11M0108 11M0108 11M0108 11M0271 11M0299 39 Logic Board 11M0107 11M0107 11M0107 11M0107 11M0107 11M0359 40 Electrostatic Screen 40M0464 40M0464 40M0464 40M0464 40M0464 40M0464 41 Ribbon Connector (10 Way) 11M0117 11M0117 11M0117 11M0117 11M0117 11M0117 42 Filtered Wire Assembly 11M0333 11M0333 11M0333 11M0333 11M0333 11M0333 43 M4 Nylon Face Nut 31Z4014 31Z4014 31Z4014 31Z4014 31Z4014 31Z4014 44 M3 x 12 Hex Head 31Z3117 31Z3117 31Z3117 31Z3117 31Z3117 31Z3117 45 Top Panel 40M0364 40M0364 40M0364 40M0364 40M0851 40M0364 46 Door cap moulding 40M0366 40M0366 40M0366 40M0366 40M0366 40M0366 47 On/Off Switch 30Z0503 30Z0503 30Z0503 30Z0503 30Z0503 30Z0503 48 Cavity 10M0026 10M0026 10M0026 10M0026 10M0102 10M0106 49 Relay Board 11M0285 11M0427 11M0427 11M0427 11M0427 11M0430 50 Fan Control Pcb —– —– —– —– —– 11M0261 51 PCB Stand-off 31Z7010 31Z7010 31Z7010 31Z7010 31Z7010 31Z7010 52 Door Spring Kit 11M0353 11M0353 11M0353 11M0353 11M0354 11M0353 53 Transformer 30Z0992 30Z0992 30Z0992 30Z0992 30Z0992 30Z0992 54 Transformer Spacer 20Z0787 20Z0787 20Z0787 20Z0787 20Z0787 20Z0787 55 Safe Edge Cover 40M0614 40M0614 40M0614 40M0614 40M0614 40M0614 56 Capacitor Clip 40H0046 40M0600 40M0600 40M0600 40M0600 40M0889
Capacitor Clip Anchor —– —– —– —– —– 40M0888 57 Capacitor L/H 58 Capacitor R/H
40M0931 40M0931 40M0931 40M0931
See Appendix 2
40M0862
40M0931
Page 29 Microcook HD Ovens 32Z3385 Issue 5
Page 30
Part number identification chart:
No Description HD1025 HD1425 HD1725 HD1925 HD2025 TA
59 Protective Boot 31Z0167 31Z0167 31Z0167 31Z0167 31Z0167 31Z0167 60 Nomex Cover —– 40M0973 40M0973 40M0973 40M0973 —– 61 Magnetron Cooling Fan 30Z0921 30Z0270 30Z0270 30Z0270 30Z0270 30Z0270 62 Thermal Trip ( Magnetron ) 25Z1016 30Z0257 30Z0257 30Z0257 30Z0257 30Z0257 63 Magnetron 30Z0264 30Z0264 30Z0264 30Z0264 30Z0289 30Z0264 64 Cold Air Duct 40M0884 40M0544 40M0544 40M0544 40M0544 40M0544 65 Diode Assembly 11M0343 11M0343 11M0343 11M0343 11M0343 11M0343 66 Delta Filter 31Z0126 31Z0126 31Z0126 31Z0126 31Z0126 31Z0126 67 Air Outlet Duct 40M0509 40M0509 40M0509 40M0509 40M0509 40M0509
68a Fuse Holder 30Z0231 30Z0231 30Z0231 30Z0231 30Z0231 30Z0231 68b Fuse 30Z0168 30Z0168 30Z0168 30Z0168 30Z0168 30Z0168 68c Fuse Cover 20Z1080 20Z1080 20Z1080 20Z1080 20Z1080 20Z1080
69 Thermal Trip ( Oven ) 30Z1011 30Z1011 30Z1011 30Z1011 30Z1011 30Z1011 70 Gold Resistor 30Z0283 30Z0283 30Z0283 30Z0283 30Z0283 30Z0283 71 Axial Fan —– 30Z0941 30Z0941 30Z0941 30Z0941 30Z0941 72 Axial Fan Bracket —– 40M0541 40M0541 40M0541 40M0541 40M0541 73 Mains Filter 30Z0997 30Z0997 30Z0997 30Z0997 30Z0997 30Z0997 74 Lampshield 40M0492 40M0492 40M0492 40M0492 40M0492 40M0872 75 Lampholder 31Z0280 31Z0280 31Z0280 31Z0280 31Z0280 —– 76 Lamp 30Z0382 30Z0382 30Z0382 30Z0382 30Z0382 30Z0901 77 Ceramic Base 20Z1355 20Z1355 20Z1355 20Z1355 40M0853 20Z1355 78 White Silastic 31Z0098 31Z0098 31Z0098 31Z0098 31Z0098 31Z0098 79 Roof 40M0563 40M0563 40M0563 40M0563 40M0563 40M0877 80 Stirrer Blade Assembly 11M0140 11M0140 11M0140 11M0140 11M0140 11M0140 81 Box Launch Seal 40M0832 40M0832 40M0832 40M0832 40M0832 40M0832 82 Tuning Stub 40M0508 40M0508 40M0508 40M0508 40M0539 40M0508 83 Hot Air Motor Assembly —– —– —– —– —– 11M0344 84 Cooling Sleeve —– —– —– —– —– 40M0878 85 Door Guide Moulding L/H 20Z0310 20Z0310 20Z0310 20Z0310 20Z0310 20Z0310 86 Door Guide Moulding R/H 20Z0309 20Z0309 20Z0309 20Z0309 20Z0309 20Z0309 87 Solenoid Fixing Screw 31Z3013 31Z3013 31Z3013 31Z3013 31Z3013 31Z3013 88 Solenoid Fixing Washer 31Z5012 31Z5012 31Z5012 31Z5012 31Z5012 31Z5012 89 Door Solenoid (L/H) 30Z0284 30Z0284 30Z0284 30Z0284 30Z0284 30Z0284 90 Door Solenoid (R/H) 30Z0010 30Z0010 30Z0010 30Z0010 30Z0010 30Z0010 91 Solenoid Cork Washer 20Z0710 20Z0710 20Z0710 20Z0710 20Z0710 20Z0710 92 Solenoid Plunger —– 20Z0970 20Z0970 20Z0970 20Z0970 20Z0970 93 Moulded Rubber Stop —– 31Z1002 31Z1002 31Z1002 31Z1002 31Z1002 94 Moulded Rubber Stop Fixing Screw —– 31Z3012 31Z3012 31Z3012 31Z3012 31Z3012 95 Microswitch (Straight Arm) 30Z0240 30Z0240 30Z0240 30Z0240 30Z0240 30Z0240 96 Microswitch (Monitor) 30Z0356 30Z0356 30Z0356 30Z0356 30Z0356 30Z0356 97 Microswitch Insulation Pad 31Z0115 31Z0115 31Z0115 31Z0115 31Z0115 31Z0115 98 Microswitch Fixing Screw 31Z3027 31Z3027 31Z3027 31Z3027 31Z3027 31Z3027 99 Microswitch Fixing Washer 31Z5018 31Z5018 31Z5018 31Z5018 31Z5018 31Z5018
100 Microswitch Fixing Nut 31Z4000 31Z4000 31Z4000 31Z4000 31Z4000 31Z4000 101 Sleeve 89W6010 89W6010 89W6010 89W6010 89W6010 89W6010 102 Clip 31Z7052 31Z7052 31Z7052 31Z7052 31Z7052 31Z7052
Page 30 Microcook HD Ovens 32Z3385 Issue 5
Page 31
Circuit diagram: Microcook HD 1025, HD1425, HD1725, HD1925, HD2025
Page 31 Microcook HD Ovens 32Z3385 Issue 5
Page 32
Circuit diagram: Turboaire II XE (Single leaded) Part 1
Page 32 Microcook HD Ovens 32Z3385 Issue 5
Page 33
Circuit Diagram: Turboaire II XE (Single leaded) Part 2
Page 33 Microcook HD Ovens 32Z3385 Issue 5
Page 34
Circuit Diagram: Turboaire II XE (Twin leaded) Part 1
Page 34 Microcook HD Ovens 32Z3385 Issue 5
Page 35
Circuit Diagram: Turboaire II XE (Twin leaded) Part 2
Page 35 Microcook HD Ovens 32Z3385 Issue 5
Page 36
APPENDIX 1: KFC models
As Microcook HD1925 except the following parts:
No Description KFC
8 Door Assembly 11M0393
Door Pocket (For Menu Card) 40M1060 38 Switch Panel Assy 11M0394 39 Logic Board 11M0416 49 Relay Board ( 2 Buzzers ) 11M0285
103 Menukey Assembly 10C0148 104 Top Panel Extrusion 40M1062 105 MenuKey connection lead 11H0064 106 Diode PCB 11M0364
40
39
38
See Appendix 6 for Logic Board connections and jumper details
104
103
Top View
49
Page 36 Microcook HD Ovens 32Z3385 Issue 5
Page 37
APPENDIX 2: Capacitors and Magnetrons
Microcook HD & TA Models:
PANASONIC MAGNETRON 30Z1171
Oven Model Capacitor LH Capacitor RH
HD 1025 1.1µF 30Z1242 ( 1 only)
HD 1425 0.88µF 30Z1330 0.75µF 30Z1329
HD 1725
HD 1925 2x 1.1µF 30Z1242
HD 2025 2x 1.1µF 30Z1242
TA 1725 2x 1.0µF 30Z1331
TA 1925 2x 1.1µF 30Z1242
SANYO MAGNETRON
Oven Model Capacitor LH Capacitor RH
HD 1025 1.25µF 30Z1078 ( 1 only)
HD 1425 0.88µF 30Z1330 1.0µF 30Z1331
HD 1725
HD 1925 2x 1.25µF 30Z1078
HD 2025 2x 1.25µF 30Z1078
TA 1725 2x 1.1µF 30Z1242
TA 1925 2x 1.25µF 30Z1078
2x 1.0µF 30Z1331
2x 1.1µF 30Z1242
Page 37 Microcook HD Ovens 32Z3385 Issue 5
Page 38
APPENDIX 3: Cleaning procedure
For the oven to operate at peak efficiency, the cavity, door and the air filters must be kept clean.
A daily cleaning routine will ensure that you comply with the required hygiene standards and will help to maintain and prolong the efficiency of your oven. Follow the SAFETY INSTRUCTIONS at the beginning of this manual.
ALWAYS switch off at the electrical supply.
As required, wipe out spillage's with disposable paper
wipes
NEVER use steel wool, knives or harsh abrasives on any part of the oven
As with all electrical appliances, it is wise to have the electrical connections inspected periodically.
Cleaning the Air Filter
1 Ease the air filter cover from the top of the rear panel. 2 Wash in clean, warm soapy water, rinse and pat dry. Put
back into position. DO NOT USE THE OVEN WITHOUT A CLEAN AIR FILTER IN POSITION
Cleaning the door
1 Lift the door up and out of the channels.
2. Wipe the door and seals with a damp cloth.
NEVER IMMERSE DOOR IN WATER. 3 Examine the door and seals for signs of wear and
damage. Refer to SAFETY INSTRUCTIONS
4 Using both hands slot the door back into its channels and
slide firmly down.
Faults arising from neglect or misuse including use without clean filters in place are not covered by the guarantee. Service visits as a result of such faults will be chargeable.
doorse
Air Filter
als
Cleaning the oven cavity
1 Wipe down the sides and the floor of the cavity with a
clean damp cloth.
2 Gently wipe the ceiling. Take care not to press upwards
as this could damage the concealed stirrer fans.
Cleaning the control panel and exterior surfaces
Wipe down regularly with a damp cloth.
Hints and Tips for stubborn stains in the oven cavity
1 Place a container of water (1.5 litres) into the centre of the
oven cavity. 2 Set timer to 9 minutes. 3 Set microwave power to 100%. 4 At end of steam cycle wipe out cavity with a clean cloth.
DO NOT USE THE OVEN
WITHOUT A CLEAN AIR
FILTER IN POSITION
Page 38 Microcook HD Ovens 32Z3385 Issue 5
Page 39
APPENDIX 4: MenuKey download procedure
The MenuKey™ System automatically changes all the cooking programs on the numbered icon pads with the turn of a key.
To change the menus on the oven:
Ensure the power switch is off.
1
Lift the MenuKey cover in the
2
front panel of the oven and put the key in the keyhole Turn the key clockwise to the stop ( ¼ turn ). Do not remove the key at this stage.
3
Switch the power switch on. The oven will now go through the program download sequence by displaying the following:
The Key Code
The number of programs and each program number on the key.
When the display shows 00:00 remove the key and close the cover. The oven is now ready to use with the new programs.
example: Key C02
example: 27 Programs
EPS - FAIL - REDO External Program System ERROR.
If the key is removed before the download is complete or the process is interrupted the display shows “EPS” then “FAIL” then “REDO”. Switch the oven off and begin the MenuKey download again.
To confirm the download is successful Switch off the oven. Switch on and the display briefly will show the following:
1. The new key code
2. 00:00 (oven ready to use)
If the download is not successful the key number will not be displayed and if the program pads are pressed an E3 error will display.
Page 39 Microcook HD Ovens 32Z3385 Issue 5
Page 40
APPENDIX 5: Fitting 30Z1177 20A Anti surge fuse
PROCEDURE FOR REPLACING 13A ANTI-SURGE FUSES WITH 30Z1177 FLM020 Type
Brief description: The change in fuse is due to the manufacturer ceasing to make the 13A anti-surge
fuses Pt. No. 30Z0168 which are unique to our requirements. To overcome this we need to use the FLM020 fuses Pt. No. 30Z1177 for the Microwave circuit on all Microcook HD1725 & HD1925 ovens. The operation listed below is to be followed to any service calls where the 13A A/S fuses have blown.
Parts required:
1. Pt. No. 30Z1177 20A littlefuse FLM020 x1
2. Pt. No. 30Z1178 30A fuse holder (FLM Series) x1
3. Pt. No. 31Z2092 Label - 20A FLM fuse x1
4. Pt. No. 31Z2030 Label - 10A fuse x1
5. Pt. No. 31Z3061 No.6x3/8” self tap pan x1
PROCEDURE FOR REPLACING 13A ANTI-SURGE FUSES WITH FLM020 IS AS FOLLOWS:
1. Isolate oven from mains power supply.
2. Remove rear cover to obtain access to the side of the oven.
3. Strip back the GSS sleeving over the mains cable approx. 50mm and cable tie back into location. (A)
4. Strip back the jacket of the mains cable, again approx. 50mm. (B)
A B
Page 40 Microcook HD Ovens 32Z3385 Issue 5
Page 41
5. Remove the blue fuse cover and the 13A fuse, then remove the 10A fuse and place in the 13A fuse location. (C)
6. Remove the (BROWN) mains wire and the filter wire L2 from the 13A fuse holder. (D)
7. Move the wires from the 10A fuse holder and fit them to the 13A fuse holder. (E)
C
E
D
8. Fit new (10AMP LABEL) Pt. No. 31Z2030 over the old 13AMP label. Remove the old 10AMP label and fit the new (20AMP LABEL) Pt. No. 31Z2092 into position so it will be visible when new fuse holder is fitted. (F)
9. Connect the (BROWN) mains wire to the bottom location on the new fuse holder Pt. No. 30Z1178, connect the filter wire L2 to the top location of the fuse holder. (G)
10. Fit the fuse holder into position using Pt. No. 31Z3061 x1 in the upper most hole location, ensure screw is bias towards the right hand side of the slot. (H)
11. Re-fit the blue cover to the 10AMP fuse holder. And fit the 20AMP fuse Pt. No. 30Z1177 in to the new fuse holder. (J)
12. Power up the oven and check machine functions correctly. (Care should be taken when powering up ovens with covers removed).
13. Turn off the power and isolate the oven from the mains power supply, then fit the cover.
14. Please ensure that you record TB067 completed on your (SVR).
F
G
H
J
Page 41 Microcook HD Ovens 32Z3385 Issue 5
Page 42
APPENDIX 6 : Logic Board & Magnetron Failure Detect
11M0416 KFC optic Logic PCB with Magnetron Failure Detect
in the event of failure the system will automatically compensate and double the remaining cook times thus ensuring that the program achieves its target temperature in the food product. At the end of the cooking cycle the system will display either “E4” = left hand magnetron failure or “E5”= right hand Magnetron failure. In the event that both Magnetrons fail the system will report an “EA” error. Once a failure is detected, It takes 4 seconds before the control circuit reacts thus preventing false triggering
1
4 5 6
Ref. Description
1 Left hand side magnetron monitor enabled / override jumper
2 Right hand side magnetron monitor enabled / override jumper
3 Microwave power and operation jumper
4 Magnetron monitor receive left (fibre optic receive)
5 Magnetron monitor receive right (fibre optic receive)
6 Locking MenuKey cable connector
Jumper Description
1 If the magnetron failure detection is being used:
3
The jumper should be positioned between the enable pin and centre pin. If not then the jumper should be positioned between override pin and centre pin. Please note that if the magnetron failure detection is not being used then fibre optic cables and diode board 11M0363 are not required. This is clearly indicated on the PCB itself.
2
2 As Jumper 1
3 01 - NC N/A
02 - 2025 Jumper ON = 2025 03 - 1925 Jumper ON = 1925 04 - 1725 Jumper ON = 1725 05 - 1425 Jumper ON = 1425 06 - 1025 Jumper ON = 1025 07 - 30 prog Jumper always ON 08 - Multi Jumper always ON 09 - Cook Jumper always OFF 10 - Man Jumper OFF = Automatic door Jumper ON = Manual door
Page 42 Microcook HD Ovens 32Z3385 Issue 5
Page 43
Manual corrections and modifications
Whilst every effort has been made to ensure that the information contained in this manual is accurate and complete, if you believe that an error has been made, or if you have any suggestions for how the manual could be improved, please fill in and return this form. A review of any forms returned will be made on a regular basis, and the manual will be updated if required.
Name
Address
Page on which error occurs (if applicable) - Microcook HD & TA
Description of error
Suggestion for improvement to manual
Please return this form to:
Service Dept. Merrychef Limited,
Station Road West, Ash Vale, Aldershot Hampshire GU12 5XA United Kingdom Tel: +44 (0)1252 371000 Fax: +44 (0)1252 371007 Internet address: http://www.merrychef.com E-mail: technical.support@merrychef.com
Page 43 Microcook HD Ovens 32Z3385 Issue 5
Loading...