Table of Contents
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Table of Contents
Troubleshooting
Related Manuals for Kuppersbusch EMWK 1050
Summary of Contents for Kuppersbusch EMWK 1050
- Page 1 Microwave oven EMWK 1050 EMWG 1050...
- Page 2 Service Manual: H4-79-01 Responsible: Dieter Rutz KÜPPERSBUSCH HAUSGERÄTE AG E-mail: dieter.rutz@kueppersbusch.de Phone: (0209) 401-733 Kundendienst Fax: (0209) 401-743 Postfach 100 132 Date: 21.06.07 45801 Gelsenkirchen...
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Page 3: Table Of Contents
Service Manual Content Safety ..........................4 Microwave warnings ....................5 Electric connection ....................5 Converter switch warnings ..................5 Technical data and functions ..................6 Technical data and general information ............... 6 Microwave power levels ..................6 Ventilation system and air cycle ................7 Power levels and their applications ............... -
Page 4: Safety
Service Manual Safety The purpose of this service manual is to provide the customer service technicians who already have the technical knowledge necessary to repair microwave ovens with specific information on the mode of operation of the EMWK / EMWG 1050. Danger Repairs may only be carried out by a qualified electrician! Incorrect repairs can be extremely dangerous for the user! -
Page 5: Microwave Warnings
Service Manual Microwave warnings • The microwave oven generates high voltages which may lead to serious or even fatal injury - it is essential to observe the safety regulations contained in this repair manual at all times. • Always disconnect the microwave from the mains prior to removing or installing components. Never attempt to measure voltage on the inverter, the magnetron or high-voltage conducting wire. -
Page 6: Technical Data And Functions
Appliance dimensions (WxHxD) 560 x 450 x 550 mm Niche dimensions (WxHxD) 420 x 210 x 390 mm approx. (capacity: 32 l ) Cooking cavity dimensions (WxHxD) EMWK 1050.0 38 kg Weight EMWG 1050.0 32 kg Microwave power levels EMWG 1050... -
Page 7: Ventilation System And Air Cycle
Service Manual Ventilation system and air cycle Air circulation Surplus hot air in the interior flows through the holes in the rear wall. A second flow of air flows through the air channel under the fastening clamp. Both air currents flow through the outlet on the left and right at the front of the interior cavity. Ventilation system Fresh air flows from below and from the back into the housing. -
Page 8: Setting The Clock
Service Manual Setting the clock After your microwave oven is first plugged in or after a power failure, the clock display will flash to indicate that the time shown is not correct. To set the clock, proceed as follows: 1. Press the Clock key. The hour numbers will start to flash. -
Page 9: What Cookware May Be Used In Your Appliance
Service Manual What cookware may be used in your appliance? Mode Only microwaves Combination mode Only hot air / grill Glass Pyrex Glass ceramic Terracotta dishes Aluminium foil Plastic Paper or cardboard Metal containers In the mode “only microwaves” and in the combination modes with microwaves all containers made of glass (Pyrex even better), ceramic, porcelain or terracotta may be used as long as they have no decorations and metal parts (decorative or gold edges, handles, feet). -
Page 10: Installation
Service Manual Installation Disposing of the packaging and your old appliance The packaging material for transport is fully recyclable.Recycling the packaging saves raw materials and reduces the amount of waste. Disposed appliances still contain useful materials. Take your old appliance to a recycling collection point. -
Page 11: Installation
Service Manual Installation 1. Open the packaging and remove the appliance. 2. Do not lift up the microwave by the door handle since this may damage the inner frame of the door. 3. Remove the adhesive tape from the door and carefully install the micro- wave in the niche. -
Page 12: After The Installation
Service Manual After the installation • If the oven is to be installed on a permanent basis it should be installed by a qualified technician. In such a case, the oven should be connected to a circuit with an all-pole circuit breaker with a mini- mum separation of 3 mm between contacts. -
Page 13: Function Tests
Service Manual Function tests Safety precautions - microwave energy Service technicians must never be exposed to the microwave radiation which can be emitted by the magnetron or other components producing microwaves if the appliance is not connected correctly or operated improperly. All input and output connections, waveguides, flanges and seals are to be attached and sealed correctly. -
Page 14: Cleaning
Service Manual Cleaning Prior to all maintenance or cleaning work always pull out the mains plug and wait until the appliance has cooled down. Cavity The cavity is made of stainless steel and therefore cleaning is extremely easy. Always keep the cover panel of the microwave outlet opening free of oil and grease splashes. -
Page 15: Accessing The Individual Components
Service Manual Accessing the individual components Open the top casing to access: • High-voltage circuit • Electronic controls • Grill • Wiring • Cross flow fan • RFI filter Remove the lower B1 air channel to access: • Thermostat 90º+150º C •... -
Page 16: Turntable Motor
Service Manual Turntable motor 1. Remove the attachments. 2. Close the door and lie the microwave down on the back. 3. Remove the motor cover. Pay close attention to the silicone sealing and the insulation panel of the grill (for combination models only). Caution! The motor of the turntable must have a metal shaft! - Page 17 Service Manual 2. Firstly use a screwdriver to carefully lift out the frame on the outside between the two hinges direct next to the glass. 3. Repeat this procedure on the left side. 4. Remove the inner clips on both sides of the frame.
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Page 18: Closing Device And Door Alignment
Service Manual Closing device and door alignment Closing device Two essential items need to be observed to enable the closing device to function properly. 1. The position of the box for the closing device (right and left): this box must be mounted securely in the fastening clips and must be installed flush with the front edge of the oven (right-hand box: spare part no. -
Page 19: Control Panel
Service Manual Door alignment The door must be parallel and flush with the control panel. The clearance between the door and the control panel must be approx. 7 mm. 7 mm In order to avoid alignment problems as a result of transporting the appliance, the door is fastened to the casing with adhesive tape to protect the appliance from strong vibrations. -
Page 20: Ventilator
Service Manual Clips Screws Screws Ventilator Remove the casing at the back in order to access the motor. The pre-chamber must be completely removed before the ventilator can be replaced. 1. Remove the nut so that the coil spring can move freely. 2. -
Page 21: Grill
Service Manual Grill The top part of the casing will need to be remo- ved in order to be able to directly access the grill. The grill is fastened with a microwave-re- sistant sealing comprising two metal parts in the interior of the oven: •... -
Page 22: Safety Precautions During Troubleshooting
Service Manual Safety precautions during troubleshooting Before it leaves the factory, every appliance is carefully checked but it must be correctly installed and operated. In spite of all safety measures, safety depends on correct installation and correct operation and maintenance by the customer. Service technicians must never be exposed to the microwave radiation which can be emitted by the magnetron or other components producing microwaves if the appliance is not connected correctly or operated improperly. -
Page 23: Leak Test (Leak Indicator Gauge)
Service Manual Leak test (leak indicator gauge) The rate of leak is understood as the microwave energy that escapes from the oven despite intact leak systems. It is measured with suitable measuring instruments as energy density at 5 cm intervals. A measuring unit is mW/cm . -
Page 24: Measuring The Output Power Of The Magnetron
Service Manual Measuring the output power of the magnetron The following procedure provides information on the working conditions of the magnetron but it does not reproduce an accurate measurement of the microwave output power. The test load is one litre (1000 ml) of water with a starting temperature of 15 - 24 °C in a container with a capacity of 1000 ml. -
Page 25: Troubleshooting
Service Manual Troubleshooting Cause / Remedy Fault The appliance does not work. Check to ensure that • the plug has been properly inserted into the socket; • the power supply circuit for the appliance has been switched on; • the door is properly closed. It must be heard as it engages; •... -
Page 26: General Faults
Service Manual 10.1 General faults Error specification Possible causes of faults Possible repair measures The food heats up but the turntable doesn’t rotate. • Defective turntable motor. • Replace the motor. • The connector is disconnected. • Connect it again. •... - Page 27 Service Manual Error specification Possible causes of faults Possible repair measures The turntable doesn’t rotate. • Terminal disconnected. • Remove the turntable motor cover and check the motor connections. Restore the connection and be sure if the terminal is fixed firmly. •...
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Page 28: Internal Faults
Service Manual 10.2 Internal faults Component Possible cause Possible repair measures High voltage diode • Diode in short circuit. • If the high voltage diode is in short circuit, the fuse may not blow but the transformer secondary winding will overheat. - Page 29 Service Manual Component Possible cause Possible repair measures High voltage transformer • Secondary winding terminal is on short circuit. • If the fuse does not blow immediately but just after some seconds, then one of the transformer terminals maybe on short circuit-> Replace the high voltage transformer.
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