Whirlpool MT 242 WH User manual

SERVICE Whirlpool Europe
Customer Services MT 242 WH
This documentation is only intended for qualified technicians who are aware of the respec-
tive safety regulations.
Date: 09.01.1998 Subject to modification
Document-No.: 4812 714 12107
Model MT 242 WH
Version 8538 242 38291 Page
Introduction safety 2
Technical data 3
Spare part list 4
Exploded view 5
Wiring diagram 6
Program diagram 7 - 8
Service Manual
Microwave oven
MT 242 WH

SERVICE
09.01.1998 / Page 2 MT 242 WH Whirlpool Europe
Doc. No: 4812 714 12107 8538 242 38291 Customer Service
Introduction safety
NTRODUCTION
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 242 WH 09.01.1998 / Page 3
Customer Service 8538 242 38291 Doc. No: 4812 714 12107
Technical data
Dimensions
Height 320 mm
Width 530 mm
Depth 450 mm
Weight
Net 20 Kg
Packed 23 Kg
Supply Connection
Europe 230 V 50 Hz 16 A
UK 240 V 50 Hz 13 A
Australia 240 V 50 Hz 10 A
Hong Kong 220 V 50 Hz 13 A
Power Limitation
DK, CH, S 2300 W, 10 A
UK 3000 W, 13 A
Australia 10 A , 240 V
Heat Sources
Output power 950 W
800 W Australia
Microwave frequency 2450 MHz
Grill
900 W
Timer
5 sec. - 90 min.

SERVICE
09.01.1998 / Page 4 MT242WH Whirlpool Europe
Doc. No: 4812 714 12107 8538 242 38291 Customer Service
Spare part list
Model MT 242 WH
Service No. 853824238291
Version 853824238291
Pos. No. 12NC Code Description
002 0 4819 442 38912 Cabinet
011 0 4819 462 79423 Foot
040 0 4819 417 19548 Hinge right
040 1 4819 417 19547 Hinge left
041 2 4819 535 98354 Shaft
044 0 4819 492 48168 Spring
100 0 4819 442 38915 Door complete
117 0 4819 498 78193 Handle crisp
120 0 4819 442 38917 Door,inner
121 0 4819 459 48832 Frame door inner
130 0 4819 404 79332 Unit,pushbutton for doorswitch
131 0 4819 535 38153 Lock door
131 1 4819 502 18402 Screw loock door,
141 0 4819 450 58203 Oven glass
143 0 4819 459 48847 Frame outer
244 1 4819 466 89229 Cover
245 0 4819 458 68122 Grid
246 0 4819 418 79756 Crisp plate medium
255 0 4819 466 78405 Turntable
264 0 4819 535 79159 Rail
264 1 4819 462 38767 Crosspiece
301 0 4819 404 79397 Holder
320 0 4819 453 58948 Control panel white
331 0 4819 412 58619 Knob timer
331 1 4819 410 28934 Button stop
331 2 4819 412 58683 Knob feature
331 3 4819 412 58682 Knob power
331 4 4819 410 28936 Button tt-stop
332 2 4819 410 28924 Button clockset
333 0 4819 410 28932 Button start
352 0 4819 130 38081 Display
355 0 4819 280 18029 Buzzer
404 0 4819 131 58019 Magnetron
406 0 4819 361 18381 Motor TT
406 1 4819 502 18372 Screw for TT-Motor
411 0 4819 148 68085 Transformer
412 0 4819 145 78207 Transformer,HT
420 0 4819 121 38012 Capacitor HT
421 0 4819 121 18162 Filter,mains
426 0 4819 121 18265 Diode HV
441 0 4819 361 18361 Motor Blower
441 1 4819 462 38877 Inlet fan
443 0 4819 515 28224 Fan wheel
452 0 4819 259 98557 Infraredelement
452 1 4819 325 18123 Reflector
452 2 4819 325 18122 Plate / Holder
485 0 4819 320 28025 Cable,HT
490 0 4819 321 18231 Cable,mains cpl. with clamp
500 0 4819 214 78623 Control unit
505 0 4819 209 88064 Microprocessor
531 0 4819 101 48142 Potentiometer
531 1 4819 101 48148 Potentiometer
531 3 4819 492 68818 Spring
561 0 4819 282 48281 Thermostat for magnetron 125 C
562 0 4819 282 48275 Thermostat 165C
Pos. No. 12NC Code Description
615 0 4819 280 68321 Relay
617 0 4819 280 68363 Relay
622 0 4819 276 18273 Switch VKS
622 3 4819 276 18373 Switch
632 0 4819 276 18336 Switch, door
651 0 4819 134 28029 Lamp cavity 240V - 25W
743 0 4819 462 38878 Casing
770 0 4819 462 38874 Air guide
770 1 4819 462 38875 Conveyor
770 2 4819 462 38876 Cap fan
774 0 4819 442 38914 Cover Mica plate upper
774 1 4819 462 88031 Plate mica large lower
794 0 4819 532 68686 Gasket ring
900 0 4819 404 78839 Bracket capacitor
971 0 4819 252 28125 Fuse 10A
972 0 4819 252 28121 Fuse T100mA

SERVICE Whirlpool Europe MT 242 WH 09.01.1998 / Page 5
Customer Service 8538 242 38291 Doc. No: 4812 714 12107
Exploded view

SERVICE
09.01.1998 / Page 6 MT 242 WH Whirlpool Europe
Doc. No: 4812 714 12107 8538 242 38291 Customer Service
Wiring diagram
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 2000 HT capacitor 5000 HT transformer 6000 HT diode

SERVICE Whirlpool Europe MT 242 WH 09.01.1998 / Page 7
Customer Service 8538 242 38291 Doc. No: 4812 714 12107
Program diagram

SERVICE
09.01.1998 / Page 8 MT 242 WH Whirlpool Europe
Doc. No: 4812 714 12107 8538 242 38291 Customer Service
Program diagram