GK640E - Microwave Oven BUFFALO - Free user manual and instructions
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USER MANUAL GK640E BUFFALO
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Snd 0 (Ton 0) → Snd 1 (Ton 1) → Snd 2 (Ton 2) → Snd 3 (Ton 3) → Snd 0 (Kein Ten)
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PROG ON 68:88 FILTER DATA x 2 ① ② ③ ④ ⑤ ⑥ ⑦ ⑧ ⑨100 % Recycled Paper
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Vis Plaque supportFrançais - 22
REMPLACEMENT DE LA LAMPE
Important
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Buffalo, Fourth Way, Avonmouth, Bristol, BS11 8TB, United Kingdom.
Tel: 0845 146 2887
CODICI DI ERRORE
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Kookinstructics....13
Boreiden/Opwarmen 13
Luchfilter schoonmaken 22
(2) schamieren (los of gebroken)
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DISPLAY
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PROGRAMMA
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CIJFERTOETSS
GEHEUGENTOETSEN PROGRAMMEREN
Eên fase
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Cozinho/Reaquccor....13
and that the course of part has been

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Commercial Microwave Oven
Instruction Manual
Planet First
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This manual is made with 100 % recycled paper.
contents
Safety information 2
Oven features 11
Oven 11
Control panel 12
Oven use 13
Cooking instructions ....13
Cooking/Reheating....13
Power levels and time variations 15
Stopping the cooking....15
Repeat features 15
Using +20s button 16
Using the defrost features 16
Memory button programming ....17
How to operate memory cooking ....19
How to operate double quantity button....19
Double quantity button programming ....19
Controlling beep tone 20
Programming air filter clean time 20
Hidden keys 21
Care of your microwave oven 21
Cleaning the ceiling cover 22
Cleaning the air filter 22
Installation instructions for stacking ....22
Replacement of lamp 23
Cookware guide 23
Cooking guide 24
Troubleshooting and error code 27
Troubleshooting....27
Error codes 28
Technical specifications 29

safety information
USING THIS INSTRUCTION BOOKLET
You have just purchased a Buffalo microwave oven. Your Owner's
Instructions contains valuable information on cooking with your microwave
oven:
• Safety precautions
• Suitable accessories and cookware
- Useful cooking tips
• Cooking time
LEGEND FOR SYMBOLS AND ICONS
WARNING Hazards or unsafe practices that may result in severe personal injury or death.
CAUTION Hazards or unsafe practices that may result in minor personal injury or property damage.
Warning; Fire hazard Warning; Hot surface
Warning: Electricity Warning; Explosive material
Do NOT attempt. Do NOT touch
Do NOT disassemble. Follow directions explicitly.
Unplug the power plug from the wall socket.
Make sure the machine is grounded to prevent electric shock.
Call the service center for help Note
Important
English - 2

IMPORTANT SAFETY INSTRUCTIONS READ CAREFULLY AND KEEP FOR FUTURE REFERENCE.
Make sure that these safety precautions are obeyed at all times.
Before using the oven, confirm that the following instructions are followed.
WARNING
(Microwave function only)
WARNING: If the door or door seals are damaged, the oven must not be operated until it has been repaired by a competent person.
WARNING: It is hazardous for anyone other than a competent person to carry out any service or repair operation that involves the removal of a cover which gives protection against exposure to microwave energy.
WARNING: Only allow children to use the oven without supervision when adequate instructions have been given so that the child is able to use the oven in a safe way and understands the hazards of improper use.
WARNING: This appliance can be used by children aged from 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning use of the appliance in a safe way and understand the hazards involved. Children shall not play with the appliance. Cleaning and user maintenance shall not be made by children unless they are aged from 8 years and above and supervised.
Only use utensils that are suitable for use in microwave ovens.
When heating food in plastic or paper containers, keep an eye on the oven due to the possibility of ignition.
The microwave oven is intended for heating food and beverages. Drying of food or clothing and heating of warming pads, slippers, sponges, damp cloth and similar may lead to risk of injury, ignition or fire.
| If smoke is emitted, switch off or unplug the appliance and keep the door closed in order to stifle any flames. | |
| WARNING: Microwave heating of beverages can result in delayed eruptive boiling, therefore care must be taken when handling the container. | |
| WARNING: The contents of feeding bottles and baby food jars shall be stirred or shaken and the temperature checked before consumption, in order to avoid burns. | |
| Eggs in their shell and whole hard-boiled eggs should not be heated in microwave ovens since they may explode, even after microwave heating has ended. | |
| The oven should be cleaned regularly and any food deposits removed. | |
| Failure to maintain the oven in a clean condition could lead to deterioration of the surface that could adversely affect the life of the appliance and possibly result in a hazardous situation. | |
| The appliance is not intended for installing in road vehicles, caravans and similar vehicles etc. |
| ★ | This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety. |
| ★ | Children should be supervised to ensure that they do not play with the appliance. |
| √ | If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified persons in order to avoid a hazard. |
| ☐ | WARNING: Liquids and other foods must not be heated in sealed containers since they are liable to explode; |
| ☐ | The appliance should not be cleaned with a water jet. |
| ★ | This oven should be positioned proper direction and height permitting easy access to cavity and control area. |
| ★ | Before using the your oven first time, oven should be operated with the water during 10 minute and then used. |
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| ★ | If the oven generates a strange noise, a burning smell, or smoke is emitted, unplug the power plug immediately and contact your nearest service center. |
| ★ | The microwave oven has to be positioned so that plug is accessible. |
| ▽ | The microwave oven is intended to be used on the counter or counter top use only, the microwave oven shall not be placed in a cabinet. |
⚠ WARNING (Oven function only) - Optional
| WARNING: When the appliance is operated in the combination mode, children should only use the oven under adult supervision due to the temperatures generated. | |
| ★ | During use the appliance becomes hot. Care should be taken to avoid touching heating elements inside the oven. |
| ☒ | WARNING: Accessible parts may become hot during use. Young children should be kept away. |
| ☒ | A steam cleaner is not to be used. |
| WARNING: Ensure that the appliance is switched off before replacing the lamp to avoid the possibility of electric shock. | |
| WARNING: The appliance and its accessible parts become hot during use. Care should be taken to avoid touching heating elements.Children less than 8 years of age shall be kept away unless continuously supervised. | |
| The temperature of accessible surfaces may be high when the appliance is operating. | |
| The door or the outer surface may get hot when the appliance is operating. | |
| Keep the appliance and its cord out of reach of children less than 8 years. |
01 SAFETY INFORMATION
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| ★ | This appliance can be used by children aged from 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning use of the appliance in a safe way and understand the hazards involved. Children shall not play with the appliance. Cleaning and user maintenance shall not be made by children without supervision. |
| ☐ | Do not use harsh abrasive cleaners or sharp metal scrapers to clean the oven door glass since they can scratch the surface, which may result in shattering of the glass. |
| ☐ | Appliances are not intended to be operated by means of an external timer or separate remote-control system. |
This product is a Group 2 Class A ISM equipment. The definition of group 2 which contains all ISM equipment in which radio-frequency energy is intentionally generated and/or used in the form of electromagnetic radiation for the treatment of material, and EDM and arc welding equipment. For Class
A equipment is equipment suitable for use in all establishments other than domestic and those directly connected to a low voltage power supply network which supplies buildings used for domestic purposes.
Warning: Class A equipment is intended for use in an industrial environment. There may be potential difficulties in ensuring electromagnetic compatibility in other environments, due to conducted as well as radiated disturbances.
Place the oven on a flat level surface 85 cm above the floor. The surface should be strong enough to safety bear the weight of the oven.
- When you install your oven, make sure there is adequate ventilation for your oven by leaving at least 10 cm (4 inches) of space behind and, on the sides of the oven and 20 cm (8 inches) of space above.
- Remove all packing materials inside the oven.
- Install the roller ring and turntable. Check that the turntable rotates freely. (Turntable type model only)

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- This microwave oven has to be positioned so that plug is accessible.
If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified persons in order to avoid a hazard. For your personal safety, plug the cable into a proper AC earthed socket.
Do not install the microwave oven in hot or damp surroundings like next to a traditional oven or radiator. The power supply specifications of the oven must be respected and any extension cable used must be of the same standard as the power cable supplied with the oven. Wipe the interior and the door seal with a damp cloth before using your microwave oven for the first time.
The following parts of your microwave oven should be cleaned regularly to prevent grease and food particles from building up:
• Inside and outside surfaces
- Door and door seals
- Turntable and Roller rings (Turntable type model only)
ALWAYS ensure that the door seals are clean and the door closes properly.
Failure to maintain the oven in a clean condition could lead to deterioration of the surface that could adversely affect the life of the appliance and possibly result in a hazardous situation.
- Clean the outside surfaces with a soft cloth and warm, soapy water. Rinse and dry.
- Remove any splashes or stains on the inside surfaces of oven with a soapy cloth. Rinse and dry.
- To loosen hardened food particles and remove smells, place a cup of diluted lemon juice in the oven and heat for ten minutes at maximum power.
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Wash the dishwasher-safe plate whenever necessary.
DO NOT spill water in the vents. NEVER use any abrasive products or chemical solvents. Take particular care when cleaning the door seals to ensure that no particles: -
Accumulate
- Prevent the door from closing correctly
√ Clean the microwave oven cavity right after each use with a mild detergent solution, but let the microwave oven cool down before cleaning in order to avoid injury.
When cleaning the upper part inside the cavity, it will be convenient to turn heater downward by 45° and clean it. (Swing heater model only)

STORING AND REPAIRING YOUR MICROWAVE OVEN
A few simple precautions should be taken when storing or having your microwave oven serviced.
The oven must not be used if the door or door seals are damaged:
- Broken hinge
• Deteriorated seals
• Distorted or bent oven casing
Only a qualified microwave service technician should perform repair
- NEVER remove the outer casing from the oven. If the oven is faulty and needs servicing or you are in doubt about its condition:
- Unplug it from the wall socket
- Contact the nearest after-sales service centre
If you wish to store your oven away temporarily, choose a dry, dustfree place. Reason: Dust and damp may adversely affect the working parts in the oven.
The Light bulb should not be replaced in person for safety reasons. Please contact nearest authorised Buffalo customer Care centre to arrange for a qualified engineer to replace the bulb.
| WARNING | |||||
| Only qualified staff should be allowed to modify or repair the appliance. | √ | √ | √ | √ | |
| Do not heat liquids and other food in sealed containers for microwave function. | √ | √ | √ | √ | |
| For your safety, do not use high-pressure water cleaners or steam jet cleaners. | √ | √ | √ | √ | |
| Do not install this appliance; near heater, inflammable material; in a humid, oily or dusty location, in a location exposed to direct sunlight and water or where gas may leak; on un level ground. | √ | √ | √ | √ | |
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| This appliance must be properly grounded in accordance with local and national codes. | √ | √ | √ | √ | |
| Remove all foreign substances such as dust or water from the power plug terminals and contact points using a dry cloth on a regular basis. | √ | √ | √ | √ | |
| Do not pull or excessively bond or place heavy objecton the power cord. | √ | √ | √ | √ | |
| In the event of a gas leak (such as propane gas, LP gas, etc.), ventilate immediately without touching the power plug. | √ | √ | √ | √ | |
| Do not touch the power plug with wet hands. | √ | √ | √ | √ | |
| Do not turn the appliance off by unplugging the power plug while an operation is in progress. | √ | √ | √ | √ | |
| Do not insert fingers or foreign substances, if any foreign substance such as water has entered the appliance, unplug the power plug and contact your nearest service centre. | √ | √ | √ | √ | |
| Do not apply excessive pressure or impact to the appliance. | √ | √ | √ | √ | |
| Do not place the oven over a fragile object such as a sink or glass object. | √ | √ | |||
| Do not use bonzone, thinner, alcohol, steam cleaner or high pressure cleaner to clean the appliance. | √ | √ | √ | √ | |
| Ensure that the power voltage, frequency and current are the same as those of the product specifications. | √ | √ | √ | ||
| Plug the power plug into the wall socket firmly. Do not use a multiple plug adapter, an extension cord or an electric transformer. | √ | √ | √ | ||
| Do not hook the power cord on a metal object, insert the power cord between the objects or behind the oven. | √ | √ | √ |
| Do not use a damaged power plug, damaged power cord or loose wall socket. When the power plug or power cord is damaged, contact your nearest service centre. | √ | √ | √ | √ | |
| Do not pour or directly spray water onto the oven. | √ | √ | |||
| Do not place objects on the oven, inside or on the door of the oven. | √ | √ | √ | ||
| Do not spray volatile material such as insecticide onto the surface of the oven. | √ | √ | |||
| Do not store flammable materials in the oven. Take special care when heating dishes or drinks that contain alcohol as alcohol vapours may contact a hot part of the oven. | √ | √ | √ | ||
| Keep children away from the door when opening or closing it as they may bump themselves on the door or catch their fingers in the door. | √ | √ | √ | √ | |
| WARNING: Microwave heating of beverages can result in delayed eruptive boiling, therefore care must be taken when handling the container; To prevent this situation ALWAYS allow a standing time of at least 20 seconds after the oven has been switched off so that the temperature can equalize. Stir during heating, if necessary, and ALWAYS stir after heating. In the event of scalding, follow these FIRST AID instructions:Immerse the scalded area in cold water for at least 10 minutes.Cover with a clean, dry dressing.Do not apply any creams, oils or lotions. | √ | √ | √ | √ | |
| Do not put the tray or rack in water shortly after cooking because it may cause breakage or damage of the tray or rack. | √ |
01 SAFETY INFORMATION
English - 9
| Do not operate the microwave oven for deep fat frying because the oil temperature cannot be controlled. This could result in a sudden boil over of the hot liquid. | √ | √ | |||
| CAUTION | |||||
| Only use utoeils that are suitable for use in microwave ovens; DO NOT use any metallic containers, Dinnerware with gold or silver trimmings, Skowers, forks, etc.Remove wire twist ties from paper or plastic bags.Reason: Electric arcing or sparking may occur and may damage the oven. | √ | √ | √ | ||
| Do not use your microwave oven to dry papers or clothes. | √ | √ | √ | ||
| Use shorter times for smaller amounts of food to prevent overheating and burning food. | √ | √ | √ | ||
| Do not immerse the power cable or power plug in water and keep the power cable away from heat. | √ | √ | |||
| Eggs in their shell and whole hard-boiled eggs should not be hoated in microwave ovens since they may explocle, even after microwave heating has ended; Also do not heat airtight or vacuum-sealed bottles, jars, containers, nuts inshells, tomatoes etc. | √ | √ | |||
| Do not cover the ventilation slots with cloth or paper. They may catch fire as hot air escapes from the oven. The oven may also overheat and switch itself off automatically, and will remain off until it cools sufficiently. | √ | √ | |||
| Always use oven mitts when removing a dish from the oven to avoid unintentional bums. | √ | ||||
| Stir liquids hallway during heating or after heating ends and allow the liquid stand at least 20 seconds after heating to prevent eruptive boiling. | √ | ||||
| Stand at arms length from the oven when opening the door to avoid getting scalded by escaping hot air or steam. | √ | ||||
| Do not operate the microwave oven when it is empty. The microwave oven will automatically shut down for 30 minutes for safety purposes. We recommend placing a glass of water inside the oven at all times to absorb microwave energy in case the microwave oven is started accidentally. | √ | √ | |||
| Install the oven in compliance with the clearances stated in this manual. (See installing your microwave oven.) | √ | √ | |||
| Take care when connecting other electrical appliances to sockets near the oven. | √ | √ | √ |
PRECAUTIONS TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY.(MICROWAVE FUNCTION ONLY)
Failure to observe the following safety precautions may result in harmful exposure to microwave energy.
(a) Under no circumstances should any attempt be made to operate the oven with the door open or to tamper with the safety interlocks (door latches) or to insert anything into the safety interlock hoves.
(c) Do NOT place any object between the oven door and front face or allow food or cleaner residues to accumulate on sealing surfaces. Ensure that the door and door sealing surfaces are kept clean by wiping after use first with a damp cloth and then with a soft dry cloth.
(c) Do NOT operate the oven if it is damaged until it has been repaired by a qualified microwave service technician trained by the manufacturer. It is particularly important that the oven door closes properly and that there is no damage to the;
(1) door (dent)
(2) door hinges (broken or loose)
(3) door seals and sealing surfaces
(d) The oven should not be adjusted or repaired by anyone other than a properly qualified microwave service technician trained by the manufacturer.
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Buffalo will charge a repair fee for replacing an accessory or repairing a cosmetic defect if the damage to the unit and/or damage to or loss of the accessory was caused by the customer. Items this stipulation covers include:
(a) A Dented, Scratched, or Broken Door, Handle, Out Panel, or Control Panel. (b) A Broken or missing Tray, Guide Roller, Coupler, or Wire Rack.
- Use this appliance only for its intended purpose as described in this instruction manual. Warnings and Important Safety Instructions in this manual do not cover all possible conditions and situations that may occur. It is your responsibility to use common sense, caution, and care when installing, maintaining, and operating your appliance.
- Because these following operating instructions cover various models, the characteristics of your microwave oven may differ slightly from those described in this manual and not all warning signs may be applicable. If you have any questions or concerns, contact your nearest service centre.
- This microwave oven is supposed for heating food. It is intended for domestic home-use only. Do not heat any type of textiles or cushions filled with grains, which could cause burns and fire. The manufacturer cannot be held liable for damage caused by improper or incorrect use of the appliance
- Failure to maintain the oven in a clean condition could lead to deterioration of the surface that could adversely affect the life of the appliance and possible result in a hazardous situation.

CORRECT DISPOSAL OF THIS PRODUCT (WASTE ELECTRICAL & ELECTRONIC EQUIPMENT)
(Applicable in countries with separate collection systems)
This marking on the product, accessories or literature indicates that the product and its electronic accessories (e.g. charger, headset, USB cable) should not be disposed of with other household waste at the end of their working life. To prevent possible harm to the environment or human health from uncontrolled waste disposal, please separate these items from other types of waste and recycle them responsibly to promote the sustainable reuse of mineral resources.
Household users should contact either the retailer where they purchased this product, or their local government office, for details of where and how they can take these items for environmentally safe recycling.
Business users should contact their supplier and check the terms and conditions of the purchase contract. This product and its electronic accessories should not be mixed with other commercial wastes for disposal.
oven features
OVEN

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1 32 4 5 6 8 9 117 1210- OVEN LAMP COVER
- DISPLAY
- CONTROL PANEL
- START BUTTON
- CEILING COVER
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DOOR HANDLE
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DOOR
- DOOR LATCHES
- OVEN LAMP
10 PLATE TRAY - AIR FILTER
- SAFETY INTERLOCK HOLES
CONTROL PANEL

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1 2 3 4 5 6 7 8 9 0 P | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 0 R1 III X2 +200 4 5 6 7 8 9-
DISPLAY
-
PROGRAM BUTTON
-
NUMBER BUTTONS
(Time, Memory Programming)
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PROGRAM LOCK BUTTON
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POWER LEVEL SELECTOR BUTTON
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DEFROST SELECTOR BUTTON
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DOUBLE QUANTITY BUTTON
-
+20s BUTTON
(One Touch Cock Button)
-
CANCEL BUTTON
-
START BUTTON
DISPLAY

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PROG ON 88:88 FILTER DATA x 2 65 78- PROGRAM INDICATOR
- TIME DISPLAY
- AIR FILTER CHECK TIME DISPLAY INDICATOR
- MEMORY BUTTON NUMBER INDICATOR
- POWER SOURCE CHECK INDICATOR (When it shows, heating does not work)
- POWER LEVEL INDICATORS
- DEFROST INDICATORS
- DOUBLE QUANTITY INDICATOR
- DATA CHECK INDICATOR
oven use
COOKING INSTRUCTIONS
The IEC Power Output rating is an internationally standardised rating, so all microwave manufacturers now use the same method of measuring power output. If food packaging gives cooking instructions based on IEC Power ratings, set cooking times according to the IEC Power of your oven. For example :
If the cooking instructions are based on a 650 W oven, then you will need to reduce some cooking time for the 850 W Ready meals are now very convenient and popular. These are meals which are already prepared and cooked by the food manufacturer, and then frozen, chilled or vacuum sealed for long life.
Increasingly, heating times for such ready meals are being based on the Heating Categories A, B, C, D and E.
On this instance, simply match the heating category of your oven to the instructions on the food package, and set your timer accordingly.
For example: If the heating instructions are 3 minutes on HIGH for a D category oven, then you will need to set your timer for less than 3 minutes on HIGH for the GK840-E (E category).
Always remember that cooking instructions are intended only as a guide. If you have followed the instructions and the food is still not piping hot throughout, simply return it to the oven and cook it until it is.
COOKING/REHEATING
One-stage cooking
Make sure the oven is plugged into a properly earthed electrical outlet and "ON" appears in the display window. Open the door (The oven lamp will be turned on.). Put the food into a suitable container, place it in the centre of the oven and then close the door securely (The oven lamp will go off.).
| 1. Select the desired power level by pressing the POWER LEVEL SELECTOR button.Result: The selected power level will be displayed in the display window. | |
| 1 | 2 | 3 | 4 | 5 | 6 | 2. Set the desired heating time by pressing the NUMBER buttons.Result: The selected time is displayed in the display window. |
| 3. Press the START button.Result: The oven lamp and cooling fan will be turned on.Heating will start. The time on digital display will count down. | |
| 4. Open the door and take the food out.Close the door. The oven lamp will go off. |
The maximum time according to each cooking power level can be referred to in the title "Power Levels and Time Variations" on page 15. The NUMBER buttons will not operate or respond when you press a cooking time exceeding the maximum value. It is not possible to set a cooking time for longer than the maximum time allowed on the chosen program. It is advisable to press CANCEL button and to enter a new power level and cooking time.
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When all time is elapsed, the end of cycle Beep Tone will sound 4 times and all heating will stop.
The oven lamp will go off. For 1 min, the display shows '0' and the cooling fan will keep working in order to cool down the interior parts. During the time, the fan will not stop even when you open the door, 1 min later it will stop. Food may be removed from oven whilst the fan is still running.
During the time, the fan will not stop even when you open the door. 1 min later it will stop and "ON" appears again. Food may be removed from oven whilst the fan is still running.
Whilst in a heating cycle, one press on CANCEL button stops the oven. At this time, the Power Check Indicator "ON" starts blinking and goes off when the CANCEL button or START button is pressed again.
You can restart it by pressing the START button or a second press on CANCEL button will cancel the selected program. While NOT in a heating cycle, one tap on CANCEL button cancels the selected program.
You can press +20s button one or more times in order to add the cooking time by 20 seconds. But you can not exceed the maximum time per power level allowed for power level selected.
When you first plug in the power cord, the oven beeps once and all the indicators show for 5 sec in the display window.
When heating cycle is completed and you open the door, the oven lamp automatically turns on and goes off 1 min later.
When you open the door whilst in a heating cycle, the oven stops operating and the oven lamp automatically turns on for 1 min and goes off 1 min later. If you leave the oven door open for more than 1 min, the oven beeps once every minute and after 5 min the power source check indicator 'CN' appears in the display window.
Multi-stage cooking
| 1. Select the desired power level by pressing the POWER LEVEL SELECTOR button or DEFROST SELECTOR button.Result: The selected power level will be displayed in the display window.0m :0 ^-1 ∞ | |
| 1 | 2 | 3 | 4 | 5 | 6 | 2. Set the desired heating time by pressing the NUMBER buttons.Result: The selected time is displayed in the display window.12:00 ^-1 m |
| 3. Repeat steps 1 and 2 for II or III stage memory programming. | |
| 4. Press the START button.Result: The oven lamp and cooling fan will be turned on. The oven will automatically start heating according to pre-programmed cooking time and power level. (I stage → II stage → III stage). The time on digital display will count down.11:59 ^-1 m |
The maximum time according to each cooking power level can be referred to in the title "Power Levels and Time Variations" on page 15. The NUMBER buttons will not operate or respond when you press a cooking time exceeding the maximum value. It is not possible to set a cooking time for longer than the maximum time allowed on the chosen program. It is advisable to press CANCEL button and to enter a new power level and cooking time.
You can not set up the same POWER LEVEL or DEFROST.
It operates as setting up sequence.
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POWER LEVELS AND TIME VARIATIONS
The power level function enables you to adapt the amount of energy dissipated and thus the time required to cook or reheat your food, according to its type and quantity. You can choose between the power levels below.
| Power level | GK640 GK641 | |||
| Percentage Output Percentage Output | ||||
| HIGH 100 % 1850 W | 100 % 1500 W | |||
| MEDIUM 70 % 1295 W | 70 % 1050 W | |||
| LOW 50 % | 925 W | 50 % | 750 W | |
| HIGH DEFROST | 20 % | 370 W | 25 % | 375 W |
| LOW DEFROST | 10 % | 185 W | 13 % | 195 W |
The packing times given in recipes and in this booklet correspond to the specific power level indicated.
| Power level | Max. Time |
| HIGH | 25 mins |
| MEDIUM | 40 mins |
| LOW | 40 mins |
| HIGH DEFROST | 50 mins |
| LOW DEFROST | 50 mins |
STOPPING THE COOKING
You can stop cooking at any time so that you can;
- Check the food
• Tum the food over or stir it
| To stop the cooking... Then... | |
| Temporarily | Temporarily: Open the door or press CANCEL button once.Result: Cooking stops.To resume cooking, close the door and press START button again. |
| Completely | Completely: Press the CANCEL button twice.Result: The cooking settings are canceled. |
If you want to cancel any cooking settings before starting cooking, simply press CANCEL button once.
REPEAT FEATURES
| 1. You can repeat the previous cooking setting (regardless of manual or automatic memory heating) by pressing the START button. The oven starts with exactly the same heating time and power level that were used in the last operation. | |
| 2. The repeat feature will be cancelled once the power source is cut off. |
USING +20S BUTTON
This is a ONE TOUCH COOK button.
By touching the button once, you can start heating instantly.
You can increase the cooking time by pressing the +20s button while heating is being done.
A cooking time increases by 20 seconds at each press on +20s button.
But it can not exceed the maximum time.
Like traditional cocking, you may find that, depending on the food's characteristics or
your tastes, you have to adjust the cooking times slightly. You can:
- Check how cooking is progressing at any time simply by
- Opening the door
- Close the door
• Increase the remaining cooking time.
![]() | Before operating the oven, times can be increased/decreased using either the time buttons or +20s button. During the operating, time may only be added by using the +20s button. |
USING THE DEFROST FEATURES
The Delrost features enables you to delrost meal, poultry or fish.
Only use containers that are microwave-safe.
Open the door. Place the frozen food in the centre of the plate tray. Close the door.
| 1. Press the DEFROST SELECTOR button to set DEFROST HIGH or DEFROST LOW as you wish.Result: The DEFROST indicator appears in the display.0% : 0 ^I | |
| 1 | 2 | 3 | 4 | 5 | 6 | 2. Prass the NUMBER buttons to set the defrosting time.(Max. 50 min)50:000% |
| 3. Prass the START button.Result: Defrosting begins.49:59 |
It is not possible to set a defrosting time for longer than 50 min. The defrost indicator will flash and it is advisable to press CANCEL button and enter a new defrost level and time.
When the oven was operating for longer than 25 min under Defrosting cycle, you can NOT change the power level from Defrosting to Heating (Cooking/Reheating) mode.
MEMORY BUTTON PROGRAMMING
One-stage
| P | 1. Hold down PROGRAM LOCK and then press PROGRAM button. Holds together for 2 sec.Result: PROG indicator appears in the digital display. |
| 1 | 2 | 3 | 4 | 5 | 6 | 2. Press appropriate NUMBER buttons for the desired memory number.Result: Selected memory program code appears below the PROGRAM indicator. |
| 3. Select power level by pressing the POWER LEVEL SELECTOR button or DEFROST SELECTOR button.Result: Default power level HIGH appears in the display at first press of the POWER LEVEL SELECTOR button. | |
| 1 | 2 | 3 | 4 | 5 | 6 | 4. Press NUMBER buttons to set the cooking time. |
| P | 5. Hold down PROGRAM LOCK and then press PROGRAM button. Holds together for 2 sec once again.Result: PROG indicator and memory number indicator blink 3 times in the digital display with a deep sound. And then the display goes blank. |
| 6. When you want to program more, repeat the procedures above again. |
Be sure to press the buttons firmly.
Press the POWER LEVEL SELECTOR button or DEFROST SELECTOR button
one or more times until you get the desired power level

The maximum time according to each cooking power level can be referred to in the title "Power Levels and Time Variations" on page 15. The NUMBER buttons will not operate or respond when you press a cooking time exceeding the maximum value. It is not possible to set a cooking time for longer than the maximum time allowed on the chosen program. It is advisable to press CANCEL button and to enter a new power level and cooking time.
Be sure to press the buttons firmly in the right position.

√ Memory programs are available up to 30 items.
Make sure the unit is properly programmed.
After programming is finished, all you have to do for memory cooking is to press the NUMBER buttons. Then the selected memory program automatically starts cooking.
Multi-stage
| 1. Hold down PROGRAM LOCK and then press PROGRAM button. Hold together for 2 sec.Result:PROG indicator appears in the digital display. | |
| 1 | 2 | 3 | 4 | 5 | 6 | 2. Press appropriate NUMBER buttons for the desired memory number.Result:Selected memory program code appears below the PROGRAM Indicator. |
| 3. Select power level by pressing the POWER LEVEL SELECTOR button or DEFROST SELECTOR button.Result:Default power level HIGH appears in the display at first press of the POWER LEVEL SELECTOR button. | |
| 1 | 2 | 3 | 4 | 5 | 6 | 4. Press NUMBER buttons to set the cooking time. |
| 5. Repeat steps 3 and 4 for II or III stage memory programming. | |
| 6. Hold down PROGRAM LOCK and then press PROGRAM button. Hold together for 2 sec once again.Result:PROG indicator and memory number indicator blink 3 times in the digital display with a beep sound. And then the display goes blank. | |
| 7. When you want to program more, repeat the procedures above again. |
Be sure to press the buttons firmly.
Press the POWER LEVEL SELECTOR button or DEFROST SELECTOR button one or more times until you get the desired power level.

The maximum time according to each cooking power level can be referred to in the title "Power Levels and Time Variations" on page 15. The NUMBER buttons will not operate or respond when you press a cooking time exceeding the maximum value. It is not possible to sell a cooking time for longer than the maximum time allowed on the chosen program. It is advisable to press CANCEL button and to enter a new power level and cooking time.
Caution Be sure to press the buttons firmly in the right position.
Memory programs are available up to 30 items. Make sure the unit is properly programmed. After programming is finished, all you have to do for memory cooking is to press the NUMBER buttons. Then the selected memory program automatically starts cooking.
You can not set up the same POWER LEVEL or DEFROST.
It operates as setting up sequence.
HOW TO OPERATE MEMORY COOKING
After having finished memory programming, just press the NUMBER buttons of the memory number you want to select. The oven will automatically start heating according to the pre-programmed cooking time and power level.
| 1. Make sure the oven is plugged into a properly earthed electrical outlet and "ON" appears in the display window. | |
| 2. Open the door.The oven lamp will be turned on. | |
| 3. Put the food into a suitable container, place it in the centre of the oven and then close the door securely.Result: The oven lamp will go off. | |
| 1 | 2 | 3 | 4 | 5 | 6 | 4. Press NUMBER buttons.Result: The selected memory program automatically starts heating. But, NUMBER buttons 1, 2, 3 operate after 2 seconds. |
HOW TO OPERATE DOUBLE QUANTITY BUTTON
| x2 | 1. Press the DOUBLE QUANTITY button. |
| 1 | 2 | 3 | 4 | 5 | 6 | 2. Press the desired memory NUMBER buttons.Result: Cooking time which was multiplied by the preset factor appears in the display and cooking starts with time digits counting down. |
You don't need to press the START button to start heating.
DOUBLE QUANTITY BUTTON PROGRAMMING
| X2 | 1. Hold down CANCEL button and then press the DOUBLE QUANTITY button. Hold together for 2 seconds. |
| 1 | 2 | 3 | 4 | 5 | 6 | 2. Select desired program code by using NUMBER buttons. |
| 1 | 2 | 3 | 4 | 5 | 6 | 3. Press NUMBER buttons to set the magnification factor within the range from 1.00 to 9.89. |
| 4. Press the START button. |
Default factor is 1.65 preset from the manufacturer for increasing the cooking time. Make sure that you set a correct factor between 1.00 and 9.99 for each memory code number.
Press button to exit the programming mode.
Though you can successfully set a double quantity factor whose setting might result in excess of the maximum time allowed for each power level, the oven does not operate exceeding the maximum time.
Default factor is 1.65 preset from the manufacturer for increasing the cooking time. Make sure that you set a correct factor between 1.00 and 9.99 for each memory code number.
Press button to exit the programming mode.
Though you can successfully set a double quantity factor whose setting might result in excess of the maximum time allowed for each power level, the oven does not operate exceeding the maximum time.
Double Quantity Factor Editing
| Feature Key Entry Display Remark | |||
| Double Quantity Factor Edit | Hold down CANCEL button and then DOUBLE QUANTITY button. | Hold down for 2 sec. | |
| Code No. | After 1 sec, default value shows in the display window. | ||
| (Input desired factor value.) | 1.00 ~ 8.39 available (Change the factor if required.) | ||
| START | If you don't want to change more, press CANCEL button to exit the editing mode. | ||
| New Code No. Skip this step if not necessary. | |||
| (Input desired factor value.) | Skip this step if not necessary. | ||
| START | Skip this step if not necessary. | ||
| CANCEL (Mode cancel) This exits the editing mode. | |||
You can select the beep tone you require. There are 4 sound levels available.
| 0 | Hold down CANCEL button and then press NUMBER 0 button. Hold together for 2 seconds.Result:Beep tone is changed to one level higher than current one. |
Beep tone 0 does not make beep sound. Settings are circulating whenever you press the hidden keys in the following order. Snd 0 → Snd 1 → Snd 2 → Snd 3 → Snd 0 [No sound]
Default tore is Snd 2.
PROGRAMMING AIR FILTER CLEAN TIME
When the air filter check indicator (FILTER) appears in the display window after a certain time of use, you should clean the air filter according to the instructions "Cleaning the Air Filter" on page 22 in this booklet. Then follow the procedure as below if you want to change the air filter clean time.
| 1. Hold down PROGRAM LOCK and then press NUMBER 3 button. Hold together for 2 seconds.Result: The display will show the length of time in hours between cleaning the air filter you have programmed in or the original time preset by the manufacturer. | |
| 1 | 2 | 3 | 4 | 5 | 6 | 2. Press NUMBER buttons to set the desired clean time. |
| 3. Hold down PROGRAM LOCK and then press NUMBER 3 button.Hold together for 2 seconds in order to save the new value.This completes the programming of the air filler clean time. | |
| 4. Prass the CANCEL button to return to cooking mode. |
Default clean time is 500 hours in terms of pure oscillating time, not the continuity time.
You can set up to 999 hours.
After the clean time has expired, you should clean the air filter. See page 22.
HIDDEN KEYS
Note: Press Key 1 and then the next one. Hold for 2 secs.
| Feature | Key Entry | Display Remark | ||
| Key 1 Next | ||||
| Continuity time total | CANCEL 1 | 99.99 | Hold together for 2 sec. Unit: 10 hrs. | |
| Magnetron oscillating time total | CANCEL | 2 | 99.99 | Hold together for 2 sec. Unit: 1 hr. |
| Number of times of use by memory program code | CANCEL | START | Hold together for 2 sec. | |
| Code No. | ||||
| (Data display after 2 sec.) | 739 | 739 times of use | ||
| (New code can be set after data display) | ||||
| CANCEL (Mode cancel) | ||||
| Heating time per memory program code(Automatic sequential display) | CANCEL PROGRAM | 1:10 | Hold together for 2 sec. | |
| (Sequentially displays for 3 sec from 1 to 30) | ||||
| CANCEL (Mode cancel) | ||||
| Cleaning the Microwave Oven |
| 1. Unplug the oven from the electrical socket before cleaning. |
| 2. Clean the inside of the oven. Wipe up all soils with a clamp cloth. Kitchen detergent solution may be used if the oven gets too dirty. Do not use harsh detergents or abrasives. |
| 3. Clean the outside of the oven with soap and water, then dry with a soft cloth. |
| 4. When you clean the window of the door, be sure to use a soft cloth after washing with very mild soap and water. Do not use window cleaner as the front door can be scratched by harsh soap or cleaners. |
If food remnant or spilled liquids stick to the oven walls, or between door seal and
door surface, they will absorb microwaves possibly resulting in arcing or sparks
Caution Make sure that water does not get into the back ventilation or control panel opening.
CLEANING THE CEILING COVER
- Hold side stoppers of ceiling cover with both hands and pull them in and down. Then take the ceiling cover out of the oven cavity.
- Rinse ceiling cover in soapy water or Food Sanitizer Solution.
- Be sure to replace the ceiling cover before using the oven.
Caution Ceiling cover must be in place securely when you use the oven. When you removed the Ceiling Cover for the purpose of cleaning, be sure to be extremely careful about the exposed inside components on the top of the oven cavity. If any of them are deformed, abnormal symptom can happen such as arding or sparks during operation. In case of such problem, contact the nearest after-sales service centre.

CLEANING THE AIR FILTER
Clean the Air Filter regularly according to the following instructions. The oven may have problems when the Air Filler becomes clogged with dust.

- Remove the bolt at both ends of the Air Filter.
- Lift the Air Filter off the post carefully.
- Wash this filter in warm scapy water.
- Be sure to replace the Air Filter before using the oven.
If the Air Filler becomes clogged with debris, this will cause an overheating problem on the oven.
If the want to change the air filter clean time, refer to "Programming Air Filter Clean Time" in page 20.
INSTALLATION INSTRUCTIONS FOR STACKING
Important
- Disconnect the power cord from the wall socket before attempting installation.
- For stacking installation, you must use the "bracket plate" which is enclosed with this unit.
- The maximum stacking height is two units.
Stacking the two units is limited to the following modes.
Be sure the oven cavity is empty.
CAUTION
Installation
- Stack two units together.
- Remove 6 screws as shown in the figure.
- Place the Bracket-plate to join the two units.
- Attach and tighten 6 screws as shown in the figure here.
- Ensure the top oven is at a safe and workable height.

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Screw Bracket-PlateEnglish - 22
REPLACEMENT OF LAMP
Important
| 1. Remove a screw securing the lamp cover. |
| 2. Remove the lamp by rotating it clockwise. |
| 3. Replace with a new lamp by rotating it counter-clockwise. |

You don't need to remove outer panel to replace lamp.

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Lamp Cover Outer Panel Lamp Holder Lamp (230 V 25 W)coo-ware guide
To cook food in the microwave oven, the microwaves must be able to penetrate the food, without being reflected or absorbed by the dish used.
Care must therefore be taken when choosing the cookware. If the cookware is marked microwave-safe, you do not need to worry. The following table lists various types of cookware and indicates whether and how they should be used in a microwave oven.
| Cookware | Microwave-safe | Comments |
| Aluminum foil | X | Can be used in small quantities to protect areas against overcooking. Arcing can occur if the foil is too close to the oven wall or if too much foil is used. |
| China and earthenware | Porcelain, pottery, glazed earthenware and bore china are usually suitable, unless decorated with a metal trim. | |
| Disposable polyester cardboard dishes | Some frozen foods are packaged in these dishes. | |
| Fast-food packaging | ||
| • Polystyrene cups containers | Can be used to warm food. Overheating may cause the polystyrene to melt. | |
| • Paper bags or newspaper | X | May catch fire. |
| • Recycled paper or metal trims | X | May cause arcing. |
| Glassware | ||
| • Over-to-tableware | Can be used, unless decorated with a metal trim. | |
| • Fine glassware | Can be used to warm foods or liquids.Delicate, glas may break or crack if heated suddenly. | |
| • Glass jars | Must remove the lid. Suitable for warming only. |
04 COOKWARE GUIDE
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(continued)
| Cookware | Microwave-safe | Comments |
| MetalDishesFreezer bag twisttes | ✕✕ | May cause arcing or fire. |
| PaperPlates, cups,napkins andkitchen paperRecycled paper | ✕√✕ | For short cooking times and warming. Alsoto absorb excess moisture.May cause arcing. |
| PlasticContainersCling filmFreezer bags | ✕✕ | Particularly if heat-resistant thermoplastic.Some other plastics may warp or discolourat high temperatures. Do not use Melamineplastic.Can be used to retain moisture. Should nottouch the food. Take care when removingthe film as hot steam will escape.Only if bollsole or oven-proof. Should not beairight. Prick with a fork, if necessary. |
| Wax or grease-proof paper | ✕√ | Can be used to retain moisture and preventspattoring. |
√ : Recommended
√X : Use Caution
X : Unsafe
cooking guide
F : Frozen C : Chilled
| Recipe Method | Power Level | Timing | Stand Time | |||
| 1850 W | 1500 W | 1300 W | ||||
| BREAD & PASTRIES | ||||||
| To Defrost | ||||||
| Vienna Baton 9" F | - DEFROST 1 | 0'45" 0'50" 0'50" 6 mins | ||||
| Vienna Baton 9" X 2 F | - DEFROST 1 | 1'10" 1'15" 1'20" 5 mins | ||||
| Gateaux, Ind. Silica F | Place on plate | DEFROST 2 | 2'30" 2'40" 2'50" 5 mins | |||
| To warm | ||||||
| Quiche 11" sliod 136 g | Place on plate | DEFROST 1 HIGH 0'40" 0'45" 0'50" 1 min | 2'30" 3'00" 3'00" 1 min | |||
| Mince plas Ind. X 2 F | Remove from tin foil Place on plate | HIGH 0'10" 0'15" 0'15" 1 min | ||||
| Fruit pie F Place on plate | Place on plate | HIGH 0'40" 0'45" 0'45" 1 min | ||||
| Croissant X 2 F | Place on plate | HIGH 0'05" 0'10" 0'10" 1 min | ||||
| Pastry, baked 227 g C | Place on plate | HIGH 0'45" 0'55" 1'60" 1 min | ||||
| Chicken & mushroom pie X 2 C | Remove foil. Place on plate | HIGH 0'45" 0'55" 1'60" 1 min | ||||
| Chicken & mushroom pie C | Place on plate, remove foil | HIGH 0'30" 0'40" 0'45" 1 min | ||||
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F: Frozen C: Chilled
| Recipe Method | Power Level | Timing | Stand Time | |||
| 1850 W | 1500 W | 1300 W | ||||
| SNACK & STARTERS | ||||||
| To cook | ||||||
| Bacon, rasher C | Place on rack | HIGH 1'30" | 1'40" | 1'50" | 1 min | |
| Eggs, poached X 2 C | Place in ramekins | HIGH 0'30" | 0'40" | 0'45" | 1 min | |
| Eggs, scrambled X 2 C | Beat eggs and place in bowl | HIGH 25" | 30" | 30" | 40" | 35" |
| Sausagos X 2 Thick C | Pierce MED 1'00" | 1'10" | 1'20" | 2 mins | ||
| To Reheat | ||||||
| Sausagos Cumberland F | Place on plate | MED 2'00" | 2'10" | 2'20" | 2 mins | |
| Full breakfast C | Cover MED 2'30" | 2'40" | 2'50" | 1 min | ||
| Beef burgers F - Chickenburger F | HIGH 0'55" | 1'05" | 1'10" | 1 min | ||
| - | HIGH 0'65" | 1'05" | 1'10" | 1 min | ||
| Donner kebab 162 g F | - | HIGH 1'00" | 1'10" | 1'20" | 1 min | |
| Hot Dog F | - | HIGH 1'00" | 1'10" | 1'20" | 1 min | |
| Pizza 190 g F | Place on plate | LOW 2'30" | 2'45" | 3'00" | 2 min | |
| Chargrilled ribs 200 g F | Place on plate | MED 3'30" | 3'45" | 4'00" | 1 min | |
| Wings of fine X 6 F | Arrange on plate, thin parts to cantor | HIGH 2'00" | 2'15" | 2'30" | 1 min | |
| Baked Beans 500 g | Cover and Stir half way | HIGH 2'00" | 2'10" | 2'20" | 2 mins | |
| Baked Beans 250 g | Cover and Stir half way | HIGH 1'00" | 1'05" | 1'10" | 2 mins | |
| Recipe Method | Power Level | Timing | Stand Time | |||
| 1850 W | 1500 W | 300 W | ||||
| DESSERTSTo wam | ||||||
| Apple Crumble200 g F | Cover in dish | HIGH 1'20" 1'30" 1" | 30" 2 mins | |||
| ChristmasPudding 150 g C | Place in bowl | HIGH 0'20" 0'25" 0" | 30" 2 mins | |||
| Jam Roly Poly80 g F | On a plate | HIGH 1'00" 1'05" 1" | 10" 2 mins | |||
| Crepce Suzatic2 F | Pierce film | HIGH 0'50" 1'00" 1" | 10" 1 min | |||
| Suet Sponge pudding F | X 2X 1 | HIGH 0'35" 1'05" 1" | 30" 2 mins | |||
| HIGH 0'40" 0'50" 1" | 30" 2 mins | |||||
| Sponge pudding F | X 2X 1 | HIGH 0'35" 1'05" 1" | 30" 2 mins | |||
| HIGH 0'40" 0'45" 0" | 45" 2 mins | |||||
| RECIPE DISH ENTREESTo Reheat | ||||||
| Amonni &Stilton bake C | Place in microwave safe dish | HIGH 3'30" 3'40" 3" | 30" 1 min | |||
| Chicken Tikka masala F | Pierce film | HIGH 3'20" 3'30" 3" | 40" 2 mins | |||
| Thai Green Chicken curry F | Pierce film | HIGH 3'00" 3'15" 3" | 30" 2 mins | |||
| Chili con Came F | Pierce film | HIGH 3'30" 3'45" 4" | 30" 2 mins | |||
| Chicken cooked % Chilled | Place in m/WIn pierced bag | MED 4'30" 5'00" 5" | 30" 2 mins | |||
(continued)
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F: Frozen C: Chilled
| Recipe Method | Power Level | Timing | Stand Time | |||
| 1850 W | 1500 W | 1300 W | ||||
| Lasagne 192 g | Place in microwave safe dish | MED 4'00" 4'16" 4'30" 2 mins | ||||
| Moules Marinores 466 g F | Pierce bag HIGH 2'30" 2'45" 3'00" 2 mins | |||||
| Salmon & Avacodo Paupelle C | Pierce bag HIGH 2'30" 2'45" 3'00" 2 mins | |||||
| Shepnerd's pie 300 g C | Place in oven and cover | MED 3'00" 3'15" 3'30" 2 mins | ||||
| Suet puddings chilled | Cover - place upright on microwave safe plate | LCW 4'00" 4'20" 4'30" 2 mins | ||||
| Supreme of chicken in red pesto 312 g F | Pierce bag place on plate | DEFROST 1 HIGH 3'30" 3'45" 4'00" | ||||
| Taglatele carbonara C | Pierce film, place on plate | HIGH 1'40" 2'00" 2'20" 1 min | ||||
| Tortallin formaggle C | Place in dish and cover | HIGH 2'00" 2'15" 2'30" 1 min | ||||
| Vogatola Cumberland Pie C | Place in microwave safe dish | HIGH 3'20" 3'35" 3'50" 1 min | ||||
| Plated Meal 350 g C | Covered HIGH 2'00" 2'15" 2'30" 1 min | |||||
| Plated Meal 700 g C | Covered HIGH 3'00" 3'15" 3'30" 1 min | |||||
| Recipe Method | Power Level | Timing | Stand Time | |||
| 1850 W | 1500 W | 1300 W | ||||
| FRESH VEGETABLES | ||||||
| To cook 500 g | ||||||
| Beans, green sliced | 60 m/4 tops water cover | HIGH 3'30" 3'15" 3" 30" 2 mins | ||||
| Broccoli, flicrets | 60 m/4 tops water cover | HIGH 3'30" 3'15" 3" 30" 2 mins | ||||
| Cabbage, shredded | 10 tops water cover | HIGH 5'30" 5'30" 6" 30" 2 mins | ||||
| Carrots, sliced | 60 m/4 tops water cover | HIGH 3'30" 3'45" 4" 30" 2 mins | ||||
| Cauliflower, florats | 60 m/4 tops water cover | HIGH 3'30" 3'45" 4" 30" 2 mins | ||||
| Whole Groon beans | 60 m/4 tops water cover | HIGH 3'30" 3'45" 4" 30" 2 mins | ||||
| Potatoes, jacket | Turn half way | HIGH 10'00" 11'00" 12" 30" 5 mins | ||||
| Sprouts | 60 m/4 tops water cover | HIGH 4'30" 4'45" 5" 30" 2 mins | ||||
| Beans, green sliced | Cover, stir half way through cooking | HIGH 3'30" 3'15" 3" 30" 2 mins | ||||
| Beans, whole Cover, stir half way | HIGH 4'30" 4'15" 4" 30" 2 mins | |||||
| Broccoli Florats | Cover, stir half way | HIGH 4'30" 4'15" 4" 30" 2 mins | ||||
| Cabbage, shredded | Cover, stir half way | HIGH 4'30" 4'15" 4" 30" 2 mins | ||||
| Carrot batons | Cover, stir half way | HIGH 4'30" 4'15" 4" 30" 2 mins | ||||
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troubleshooting and error code
TROUBLESHOOTING
If you have any of the problems listed below try the solutions given.
This is normal.
• Condensation inside the oven.
• Air flow around the door and outer casing.
• Light reflection around the door and outer casing.
• Steam escaping from around the door or vents.
The oven does not start when you press the START/+20s button.
• Is the door completely closed?
The food is not cooked at all.
- Have you set the timer correctly and/or pressed the START/+20s button?
• Is the door closed?
- Have you overloaded the electric circuit and caused a fuse to blow or a breaker to be triggered?
The food is either overcooked or undercooked.
- Was the appropriate cooking length set for the type of food?
• Was an appropriate power level chosen?
The light bulb is not working.
- The Light bulb should not be replaced in person for safety reasons. Please contact nearest authorised Buffalo customer care, to arrange for a qualified engineer to replace the bulb.
The oven causes interference with radios or televisions.
- Slight interference may be observed on televisions or radios when the oven is operating. This is normal. To solve this problem, install the oven away from televisions, radios and aerials.
- If interference is detected by the oven's microprocessor, the display may be reset. To solve this problem, disconnect the power plug and reconnect it. Reset the time.
Sparking and cracking occur inside the oven (arcing).
• Have you used a dish with metal trimmings?
• Have you left a fork or other metal utensil inside the oven?
• Is aluminum foil too close to the inside walls?
Smoke and bad smell when initial operating.
- It's a temporary condition by new component heating. Smoke and smell will disappear completely after 10 minutes operation.
To remove small more quickly, please operate microwave oven with putting lemon formation or lemon juice in the cabinet.
If the above guidelines do not enable you to solve the problem, then contact your local Buffalo customer service centre.
Please have the following information read:
- The model and serial numbers, normally printed on the rear of the oven
- Your warranty details
• A clear description of the problem
Then contact your local dealer or Buffalo aftersales service.
If you have any questions or comments relating to Buffalo products, please contact the Buffalo customer care centre.
Buffalo. Fourth Way, Avonmouth, Bristol, BS11 BTB, The United Kingdom.
Tel: 0845 146 2887
ERROR CODES
| Error Items Code | Error | Beep Cause | |
| Power frequency Error (50/60 Hz) | E1 One long beep for 2 sec. | Power frequency is other than 50 Hz. | |
| RemedyUnplug the power cord plug and check if the power frequency is 50 Hz.Plug the power cord in 50 Hz power source and see if "E1" appears. If the error code is displayed again even after the correct power source is provided, contact the nearest service centre. | |||
| Error Items Code Error | Beep Cause | |
| Thermistor Open Error | E21 One long beep for 2 sec. | Thermistor Sensor which is supposed to sense the temperature of the cavity inside does not work properly.(Thermistor Sensor open) |
| RemedyUnplug the power cord and wait for more than 10 seconds.Plug the power cord again. If the symptom persists, contact the nearest service centre. | ||
| Thermistor Short Error | E22 One long beep for 2 sec. | Thermistor Sensor which is supposed to sense the temperature of the cavity inside does not work properly.(Thermistor Sensor short) |
| RemedyUnplug the power cord and wait for more than 10 seconds.Plug the power cord again. If the symptom persists, contact the nearest service centre. | ||
| Temperature of exhaust air too High Error | E3 One long beep for 2 sec. | The oven cavity gets too hot due to excessive operation with no load or small load, or due to some blocking materials around the Air Filter or Air Exhaust at the back of the oven. |
| RemedyOpen the oven door and check if 1) the oven has been operating with no load or too small load. 2) the air filter is placed in a wrong position, or 3) any blocking materials exist around the Air Exhaust. Cool down the oven (for approx. 30 min) under the normal temperature. The oven is back to normal when the error code “E3” disappears and “ON” appears again in the display window.Unplug the power cord, remove the blocking materials around the ventilation openings, cool down the oven (for approx. 30 min) sufficiently, plug the power cord in again and check if the error code appears again.If the symptom persists even when the oven is cooled down sufficiently, contact the nearest service centre. | ||
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| Error Items Code | Error | Beep Cause | |
| HVT-I Power Error | E41 Che long beep for 2 sec. | The circuitry inside the oven is not working correctly. | |
| RemedyUnplug the power cord and wait for 10 seconds.Plug the power cord in again and check if the error code "E41" appears again. If the symptom persists, contact the nearest service centre. | |||
| HVT-II Power Error | E42 Che long beep for 2 sec. | The circuitry inside the oven is not working correctly. | |
| RemedyUnplug the power cord and wait for 10 seconds.Plug the power cord in again and check if the error code "E42" appears again. If the symptom persists, contact the nearest service centre. | |||
| EEPROM Error | E5 One long beep for 2 sec. | Memory IC (EEPROM IC) is not working correctly.In this case, other features except for memory function work properly.(You can operate the oven manually.) | |
| RemedyPress CANCEL button one or more times and try to start a memory heating. If the error code "E5" persists, contact your nearest service centre. | |||
For any codes not listed above, or if the suggested solution does not solve the problem, contact your local Buffalo Customer Care Centre.
technical specifications
Buffalo strives to improve its products at all times. Both the design specifications and these user instructions are thus subject to change without notice. By right of the common regulation 2/1884 (III.10) BKM-pM, we as distributors testify, that the GK640, GK641 ovens of Buffalo comply with the undermentioned technological parameters.
| Model GK640 GK641 | ||
| Power source | 230 V - 50 Hz | |
| Power consumptionMicrowave 3200 W 3000 W | ||
| Output power 1850 W (IEC-705) 1500 W (IEC-705) | ||
| Operating frequency 2450 MHz | ||
| Dimensions (W x H x D)Outside Oven cavity | 464 x 368 x 557 mm370 x 190 x 370 mm | |
| Volume 28 liter | ||
| WeightNet 32 kg approx | ||
| Noise level | 54.5 dB | |
07 TECHNICAL SPECIFICATIONS



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MEMOMEMO 1360-5_218614_321_D1654127540_J7.m4 32.20146627 0041576
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MEMOMEMO 1360-5_2360-5_321_D45-5127540_J7.m4 1.2014647 844156
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