Whirlpool MT 42 / WH User manual

SERVICE Whirlpool Europe
Customer Services
Model MT 42 / WH
Version 8538 042 99281 Page
Introduction safety 2
Technical data 3
Spare part list 4
Exploded view 5
Wiring diagram 6
Service Manual
Microwave oven
MT 42 / WH
MT 42 / WH
This documentation is only intended for qualified technicians who are aware of the respec-
tive safety regulations.
Date: 12.03.2002 Subject to modification
Document-No.: 4812 714 14242

SERVICE
12.03.2002 / Page 2 MT 42 / WH Whirlpool Europe
Doc. No: 4812 714 14242 8538 042 99281 Customer Service
Introduction safety
INTRODUCTION
Before leaving the factory each oven is carefully checked.
It must, however, be installed and used correctly.
Despite all the steps taken to make the oven safe, the safety is dependent on the correct installation and the fact
the user understands how to use and maintain the oven.
The information in this section should be used as a reminder that the oven is safe and that anyone who uses it must
first read the instructions for use in order to be able to use the oven correctly and obtain best results.
SAFETY
To avoid injury to yourself and damage to the appliance always work to the following rules when servicing an oven.
Always disconnect the plug from the mains before starting work.
If there is no plug switch off the electric supply at the control box.
When you have finished servicing an oven before you reconnect it to the mains, make sure that:
- all the internal connections are correct
- the wires are insulated and not touching the door or the cabinet or anything sharp
- all the earth connections are electrically and mechanically sound
- do not modify or anyway interfere with the safety devices built-in to the oven
- make sure that each replacement part you use conforms to the manufacturer´s specifications
Do not start a repair if you have any doubt as to your ability to complete it.
CAUTION - MICROWAVE RADIATION
PERSONNEL SHOULD NOT BE EXPOSED TO THE MICROWAVE ENERGY WHICH MAY RADIATE FROM THE MAGNETRON,
WAVEGUIDE OR ANTENNA IF THEY ARE IMPROPERLY USED OR CONNECTED. ALL INPUT
AND OUTPUT MICROWAVE CONNECTIONS, WAVEGUIDES, FLANGES AND GASKETS MUST BE SECURE.
NEVER OPERATE THE DEVICE WITHOUT A MICROWAVE ENERGY ABSORBING LOAD ATTACHED.
NEVER LOOK INTO AN OPEN WAVEGUIDE OR ANTENNA WHILE THE DEVICE IS ENERGIZED.
NEVER OPERATE AN OVEN WITH CABINET OFF WITHOUT MEASURING THE MICROWAVE LEAKAGE
AROUND MAGNETRON AND VISIBLE MICROWAVE CONNECTIONS (WELDING JOINTS).
Do not operate the oven if the following conditions exist:
- the door does not close firmly against the door support because of the door being warped or the hinges damaged.
- The door trims or seals are damaged.
- If there is any visible damage to the oven.
- if the door does not close properly.
Avoid operating the oven if known components in the interlock system, oven door or microwave
generating assembly are known defective. They must be replaced.
WARNING - HIGH VOLTAGE
IT IS POSSIBLE TO COME IN CONTACT WITH LETHAL HIGH VOLTAGE WHEN WORKING WITH
HV TRANSFORMER, HV CAPACITOR AND MAGNETRON. THEREFORE NEVER TRY TO MEASURE
THE HIGH VOLTAGE. ALWAYS TAKE UTMOST CARE WHEN PERFORMING ELECTRIC
MEASUREMENTS INSIDE THE OVEN.

SERVICE Whirlpool Europe MT 42 / WH 12.03.2002 / Page 3
Customer Service 8538 042 99281 Doc. No: 4812 714 14242
Technical data
Dimensions of cabinet
Height 312 mm
Width 529 mm
Depth 450 mm
Dimensions of cavity
Height 205 mm
Width 335 mm
Depth 370 mm
Cavity volume 26 l
Weight
Net 20 kg
Gross 23 kg
Electrical
Voltage 230 V
Frequency 50 Hz
Current consumption 11,5 A
Fuse 15 A
Power
Power consumption 2650 W
Power consumption MW 1650 W
Output power MW 1000 W
Grill 1000 W
Microwave frequency 2450 MHz
Timer
90 min
Features
- Quartz grill
- Crisp function
- Auto defrost
- Auto crisp
- Jet start
- Child lock
- 8 power levels
- Cavity Inox
- 24 hour clock
Accessories
Built-in kit AVM 124 NB
4819 310 18595
Error codes
Certain fault conditions are indicated by an error code.
The following codes are implemented:
ERR 0 Convection temperature sensor fault.
Not connected or short circuit.
ERR 1 Short circuit in the MW relay.
ERR 6 Weight sensor calibration has not been performed.
ERR 7 Humidity sensor is defect or has not been connected.
ERR 8 Impossible to write to E2PROM.
ERR 9 Options have not been set.
ERR A No wheel detected on weight sensor.
ERR B No pulses from the weight sensor or <4267 Hz.
ERR C Fuzzy temperature sensor fault. Not 19-41 ˚C.

SERVICE
12.03.2002 / Page 4 MT 42 / WH Whirlpool Europe
Doc. No: 4812 714 14242 8538 042 99281 Customer Service
Spare part list
Model MT 42 / WH
Service No. 853804299281
Version 853804299281
Pos. No. 12NC Code Description
001 0 4819 442 38912 Cabinet WH
013 0 4819 462 79423 Foot
041 0 4819 417 19547 Hinge left
041 1 4819 417 19548 Hinge right
041 2 4812 535 98059 Shaft hinge
044 0 4819 492 48168 Spring
100 0 4812 442 69244 Door cpl. WH
117 0 4819 498 78366 Handle for crisp plate
120 0 4819 442 38917 Door, inner metal part
121 0 4819 459 48932 Door frame inner
130 0 4819 310 39783 Unit, pushbutton cpl.
131 0 4819 535 38153 Lock door
131 1 4812 502 38351 Screw
141 0 4812 450 58659 Oven glass outer
143 0 4812 459 48138 Door frame outer WH
234 0 4819 325 18122 Plate / Holder
246 0 4819 418 79915 Tray crisp
255 0 4819 466 78405 Turntable
264 0 4819 535 79159 Rail
264 1 4819 462 38767 Crosspiece
305 0 4812 404 78546 Holder PCB
320 0 4812 453 59567 Panel, control WH
331 9 4812 492 58042 Shaft axis
333 0 4812 412 58951 Knob start-stop WH
334 4 4812 412 58946 Knob, timer BL
334 6 4812 412 58952 Knob tt-stop WH
352 0 4819 130 38083 Display
355 0 4819 280 18029 Buzzer
404 0 4819 131 58019 Magnetron
404 1 4819 462 38875 Conveyor magnetron
404 2 4819 462 38874 Air guide cavity
406 0 4812 361 58156 Motor Turntable
406 1 4819 502 18372 Screw for TT-Motor
406 2 4819 532 68686 Gasket ring for TT
411 0 4819 148 68076 Transformer electronics
412 0 4812 145 28015 Transformer HT
420 0 4819 121 18299 Capacitor 1,15µF-2100V
420 1 4819 404 78839 Bracket capacitor
421 0 4819 121 18162 Filter, mains
426 0 4819 121 18265 Diode HV
442 0 4819 361 18361 Motor Blower
442 1 4819 462 38876 Cap fan
442 2 4819 462 38877 Inlet fan
443 0 4819 515 28224 Fan wheel
452 0 4819 259 98557 Infraredelement quartz
452 1 4819 325 18123 Reflector
485 0 4819 320 28025 Cable, HT
490 0 4819 321 18231 Cable, mains cpl.SA w.clamp
500 0 4812 214 78828 Control board
502 3 4812 101 08807 Potentiometer
505 0 4812 209 88017 Microprocessor
561 0 4819 282 48281 Thermostat for magnetron 125˚C
564 0 4819 282 48275 Thermostat 165˚C
617 0 4819 280 68363 Relay 24V DC
617 1 4819 280 68321 Relay
Pos. No. 12NC Code Description
622 0 4819 276 18273 Switch VKS
622 3 4819 276 18448 Switch tt stop
633 0 4812 271 38395 Switch, door
651 0 4819 134 88199 Lamp oven
774 0 4819 442 38914 Cover Mica plate upper
774 1 4819 462 88031 Plate mica large lower
971 0 4819 252 28125 Fuse T10A
972 0 4819 252 28132 Fuse T160mA

SERVICE Whirlpool Europe MT 42 / WH 12.03.2002 / Page 5
Customer Service 8538 042 99281 Doc. No: 4812 714 14242
Exploded view

SERVICE
12.03.2002 / Page 6 MT 42 / WH Whirlpool Europe Doc. No: 4812 714 14242 8538 042 99281 Customer Service
Wiring diagram
BL Blue
BLK Black
BR Brown
GY Grey
RD Red
WT White
YW Yellow
Y/G Yellow-Green
4003 Control system
4010 Magnetron
4030 Mainsfilter
4040 Secondary doorswitch
4050 Monitor doorswitch
4060 Primary doorswitch
4070 Motor fan
4080 Motor turntable
4120 Oven lamp
4130 Thermostat oven
4140 Thermostat magnetron
4180 Heatingelement grill
4181 Heatingelement grill
2000 HT capacitor
5000 HT transformer
6000 HT diode
OVEN IN OFF POSITION
WITH DOOR CLOSED