Buffalo GK640-E, Instruction Manual, Page: 220 / 224

English - 28
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)
Remedy
Unplug 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)
Remedy
Unplug 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.
Remedy
Open 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.
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 smell 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 8TB, 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.
Remedy
Unplug 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.
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