Whirlpool | Microwave Oven MT 255 | User's Manual | Whirlpool Microwave Oven MT 255 User's Manual

SERVICE
Whirlpool Europe
Customer Services
MT 255/RED
Service Manual
Microwave oven
MT 255/RED
Model
Version
MT 255/RED
8538 255 99331
Page
Introduction safety
2
Technical data
3
Spare part list
4
Exploded view
5
Wiring diagram
6
Program diagram
7-8
This documentation is only intended for qualified technicians who are aware of the respective safety regulations.
Date: 21.11.2000
Subject to modification
Document-No.: 4812 714 13673
21.11.2000 / Page 2
Doc. No: 4812 714 13673
MT 255/RED
8538 255 99331
Whirlpool Europe
Customer Service
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
Customer Service
MT 255/RED
8538 255 99331
21.11.2000 / Page 3
Doc. No: 4812 714 13673
Technical data
Power
Dimensions of cabinet
Height
Width
Depth
312
529
450
mm
mm
mm
205
335
370
26
280
mm
mm
mm
l
mm
Power consumption max.
Power consumption MW
Output power MW
Grill
Microwave frequency
Dimensions of cavity
Height
Width
Depth
Cavity volume
Turntable diameter
kg
kg
Features
Electrical
Voltage
Frequency
Current consumption
Fuse
230
50
11.5
16
V
Hz
A
A
- Quartz grill
- Crisp function
- Jet defrost
- Jet start
- 8 power levels
- Child lock
- 24 hour clock
Error codes
Certain fault conditions are indicated by an error code.
The following codes are implemented:
ERR 0
90
min
Accessories
Built-in kit
20
23
W
W
W
W
MHz
Timer
Weight
Net
Gross
2650
1650
1000
1000
2450
ERR 1
Convection temperature sensor fault.
Not connected or short circuit.
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 E2 PROM.
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.
AVM 124
21.11.2000 / Page 4
Doc. No: 4812 714 13673
MT 255/RED
8538 255 99331
Whirlpool Europe
Customer Service
SERVICE
Spare part list
Model
Service No.
Version
MT 255/RED
853825599331
853825599331
Pos. No. 12NC Code
Description
Pos. No. 12NC Code
Description
001 0
011 0
041 0
041 1
041 2
4819 442 39194
4819 462 79423
4819 417 19547
4819 417 19548
4812 535 98057
Cabinet red
Foot
Hinge left
Hinge right
Shaft hinge
502 3
505 0
561 0
564 0
617 0
4819 101 48142
4812 209 88003
4819 282 48281
4819 282 48275
4819 280 68363
Potentiometer
Microprocessor
Thermostat for magnetron 125 ˚C
Thermostat 165 ˚C
Relay 24V DC
044 0
100 0
117 0
120 0
121 0
4819 492 48168
4819 442 39193
4819 498 78366
4819 442 38917
4819 459 48932
Spring
Oven door red
Handle for crisp plate
Door,inner metal part
Door frame
617 1
622 0
622 3
633 0
651 0
4819 280 68321
4819 276 18273
4819 276 18448
4819 276 18336
4819 134 88199
Relay
Switch VKS
Switch tt stop
Switch, door
Lamp oven
130 0
131 0
131 1
141 0
143 0
4819 310 39783
4819 535 38153
4819 502 18403
4819 450 58203
4819 459 48873
Unit,pushbutton
Lock door
Screw f. locking hook
Oven glass
Frame red
774 0
774 1
971 0
972 0
4819 442 38914
4819 462 88031
4819 252 28125
4819 252 28121
Cover Mica plate upper
Plate mica large lower
Fuse T10A
Fuse T100mA
234 0
234 1
246 0
255 0
264 0
4819 325 18122
4819 462 38878
4819 310 18538
4819 466 78405
4819 535 79159
Plate / Holder
Casing
Crisp plate VIP27
Turntable
Rail
264 1
301 0
305 0
320 0
332 2
4819 462 38767
4819 410 29065
4819 404 79333
4812 453 58871
4819 410 28924
Crosspiece
Button assy red
Holder
Panel,control red
Button clockset
333 0
334 3
334 4
334 5
334 6
4819 410 29055
4812 412 28024
4819 411 29484
4819 410 29056
4812 410 28648
Button start red
Button defrost
Knob,timer red
Button stop red
Button tt-stop red
334 7
334 8
352 0
355 0
404 0
4812 412 28027
4812 412 28025
4819 130 38083
4819 280 18029
4819 131 58019
Button plus red
Button minus red
Display
Buzzer
Magnetron
404 1
404 2
406 0
406 1
406 2
4819 462 38875
4819 462 38874
4819 361 18381
4819 502 18372
4819 532 68686
Conveyor magnetron
Air guide cavity
Motor TT
Screw for TT-Motor
Gasket ring for TT
411 0
412 0
420 0
420 1
421 0
4819 148 68076
4819 145 78207
4819 121 18299
4819 404 78839
4819 121 18162
Transformer electronics
Transformer,HT 230V
Capacitor 1,15µ F-2100V
Bracket capacitor
Filter,mains
426 0
442 0
442 1
442 2
443 0
4819 121 18265
4819 361 18361
4819 462 38876
4819 462 38877
4819 515 28224
Diode HV
Motor Blower
Cap fan
Inlet fan
Fan wheel
452 0
452 1
485 0
490 0
500 0
4819 259 98557
4819 325 18123
4819 320 28025
4819 321 18231
4812 214 78322
Infraredelement 115V 450W
Reflector
Cable,HT
Cable,mains cpl.SA w.clamp
Control unit
SERVICE
Exploded view
Whirlpool Europe
Customer Service
MT 255/RED
8538 255 99331
21.11.2000 / Page 5
Doc. No: 4812 714 13673
21.11.2000 / Page 6
Doc. No: 4812 714 13673
Wiring diagram
MT 255/RED
8538 255 99331
Whirlpool Europe
Customer Service
OVEN IN OFF POSITION
WITH DOOR CLOSED
Blue
Black
Brown
Grey
Red
White
Yellow
Yellow-Green
4003
4010
4030
4040
4050
4060
Control system
Magnetron
Mainsfilter
Secondary doorswitch
Monitor doorswitch
Primary doorswitch
4070
4080
4120
4130
4140
4180
4181
Motor fan
Motor turntable
Oven lamp
Thermostat oven
Thermostat magnetron
Heatingelement grill
Heatingelement grill
2000 HT capacitor
5000 HT transformer
6000 HT diode
SERVICE
BL
BLK
BR
GY
RD
WT
YW
Y/G
SERVICE
Program diagram
Whirlpool Europe
Customer Service
MT 255/RED
8538 255 99331
21.11.2000 / Page 7
Doc. No: 4812 714 13673
21.11.2000 / Page 8
Doc. No: 4812 714 13673
Program diagram
MT 255/RED
8538 255 99331
Whirlpool Europe
Customer Service
SERVICE
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