Whirlpool AVM 512 User manual

SERVICE Whirlpool Europe
Customer Services
Model AVM 512
Version 8538 512 62291 Page
Introduction safety 2
Technical data 3
Text/Legend 4 - 8
Spare part list 9
Exploded view 10
Wiring diagram 11
Service Manual
Microwave oven
AVM 512
AVM 512
This documentation is only intended for qualified technicians who are aware of the respec-
tive safety regulations.
Date: 11.11.1998 Subject to modification
Document-No.: 4812 714 12457

SERVICE
11.11.1998 / Page 2 AVM 512 Whirlpool Europe
Doc. No: 4812 714 12457 8538 512 62291 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 AVM 512 11.11.1998 / Page 3
Customer Service 8538 512 62291 Doc. No: 4812 714 12457
Technical data
Electrical
Voltage 230 V
Frequency 50 Hz
Power consumption 1350 W
Power
Output power 850 W
Microwave frequency 2450 MHz
Timer
Electronic 99 min. 99 sec.
10-level microwave power level
4-stage programmed cooking

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11.11.1998 / Page 4 AVM 512 Whirlpool Europe
Doc. No: 4812 714 12457 8538 512 62291 Customer Service
Text/Legend
INSTALLATION REQUIREMENTS
GENERAL
The oven should be placed on a flat and stable surface
Place the oven away from high temperature and steam sources.
Clearance of at least 5cm (2”) on each side must be provided to allow adequate ventilation.
The microwave oven must be plugged directly to a 3-prong wall receptacle which is properly grounded.
The power source must be 220V 50Hz 8A single phase.
GROUNDING INSTRUCTIONS
IMPORTANT:
DISCONNECT POWER BEFORE SERVICING, RECONNECT ALL GROUNDING DEVICES.
All mechanical parts of this appliance capable of conducting electricity are grounded. In the event of an
electrical short circuit, grounding reduces the risk of electric shock. This appliance is equipped with a cord
having a grounding wire with a ground plug. The plug must be plugged into an outlet that is properly installed
and grounded.
WARNING:
IMPROPER USE OF THE GROUNDING PLUG MAY RESULT IN ELECTRICAL SHOCK.
If grounding wires, screws, straps, clips, nuts or washers used to complete a path to ground are removed for
service, they must be returned to their original positions and properly fastened.
GROUNDING SPECIFICATION:
Leakage current: 0.5 mA max.
Ground path resistance: 0.1 ohm max.
OPERATIONAL DESCRIPTION
The following describe the basic operation of the appliance. Please refer to the schematic diagram when
reading:
Food is placed inside the oven and the door is closed. “Start” button is not pressed:
Primary and secondary interlock switches are closed. Monitor switch is open. Door switch is closed. Relay 1
and relay 2 are both open.
When the timer is set for a certain cooking time, cook power is set and the “Start” button pressed:
Relay 1 is closed. AC power is supplied to the cavity lamp, fan motor and turntable motor. Depending on the
power level setting, AC power is supplied to the HV transformer through relay 2 with the duty cycle
corresponding to the power level setting. The display timer will start to count down.
When the timer counts to Zero:
Relay 1 and relay 2 will be and all AC power to the motor, lamp and HV transformer will be cut. The control
board buzzer will give a “beep” sound to give an OFF signal.
When the door is open during cooking:
Primary and secondary interlock switch are opened. Door switch is opened. The monitor switch is closed. All
AC power will be cut.
Pure microwave cooking:
10 power level settings are available for pure microwave cooking. This can be adjusted using the power switch
on the touch foil. Power level control is achieved by switching the magnetron ON and OFF periodically. The
oven works on 15 second cycle and the following indicate the correct ON/OFF timing.

SERVICE Whirlpool Europe AVM 512 11.11.1998 / Page 5
Customer Service 8538 512 62291 Doc. No: 4812 714 12457
MICROWAVE AND LEAKAGE TESTS
MICROWAVE TEST
The following is a simple test to check if the appliance is generating microwave energy. This test is not
intended to be an accurate test. An accurate measurement of output power must be performed under strict
control following the IEC standard. In field service, accurate measurement of output power is usually not
required and necessary.
Prepare a glass beaker with a diameter of approx. 190 mm round. with a max. 3 mm wall thickness.
Fill the beaker with exact 1 liter of cold water with an temperature of 10-12 ˚C measure the temperature
of the water before placing into the oven.
Start the oven for 1 min. on full power (only microwave) check the time by your writwatch after the
magnetron takes full power (Ampere meter).
The unit should be heated up 2-3 times before the test starts.
Check the water temperature under stirring the water and calculate the difference to the start temperature.
˚C x 70(multiplicator)=watt
Please take under consideration that always the measured power output is 15-20% lower than the rating plate
shows. 850 W = 720-680 W if the measured output is below this rate please repeat the measurement.
LEAKAGE TEST
TESTING EQUIPMENT
0.5l beaker.
Microwave tester of high quality.
Power setting ON time
10(highest) 100%
9 approx 93%
8 approx 87%
7 approx 80%
6 approx 67%
5 approx 60%
4 approx 53%
3 approx 40%
2 approx 33%
1 (lowest) approx 27%