Panasonic Bread Bakery SD-253, Service Manual

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Check point Diagnosis Remedy
Connection of the heater terminals Check the connection of the heater terminals. Make a proper connection.
<Reference value> (If no problem is found with the connection) Replace the heater.
Resistance of the heater (in normal status) 230V: 96
Ω
-
240V: 104
Ω
-
2.1.4. Thermistor Operation Test (Perform this test after replacing the defective
thermistor.)
1. Make sure that the main body is in the main body test waiting mode. Press the "select" pad.
2. The LED is illuminated with "BAKE" and "RAPID" shown on the display.
3. Turn on the heater for 3 seconds at 32 second intervals. Set the thermistor temperature at 35°C.
4. Pressing the "Stop/Start" pad returns you to the main body test waiting mode.
Evaluation:
If the thermistor section in the main body remains at approximately 35°C, the thermistor is functioning properly.
2.1.5. Buzzer Operation Test
1. Make sure that the main body is in the main body test waiting mode. Press the "Size" pad.
2. The LED is illuminated with "RAISIN" and "DOUGH" shown on the display.
3. Repeat the ON (0.3 seconds)-OFF (0.7 seconds) procedure 8 times.
4. Pressing the "Stop/Start" pad returns you to the main body test waiting mode.
Remedy:
If the buzzer does not sound during the buzzer operation test, replace control boards A and B.
When the main body operation test is finished, press the "Stop/Start" pad.
When the main body test modes 1.1.1 ~ 1.1.5 are checked and completed successfully, the main body is not experiencing a
problem. Please check the following, as the cause may lie with the user.
Causes and Remedies of user-side problems
Symptom Cause Remedy
The baked color is too dark. The amount of sugar is excessive. Reduce the amount of sugar.
The proper baked color is not selected. Select the proper baking color.
The baked color is too light. The amount of sugar is insufficient. Add the correct amount of sugar.
The proper baked color is not selected. Select the proper baking color.
The inner lid is dirty and darkened. Clean the inner lid.
The height of the bread was not sufficient. Use the correct amount of ingredients.
Bread rising is insufficient due to a high
temperature. (no less than 30°C)
Use water at a temperature of 5°C or lower.
The bread does not rise enough. The amount of sugar is insufficient. Add the correct amount of sugar.
The flour was too old. Use new flour.
The flour does not have enough protein. Use flour that contains a lot of protein.
The amounf ot water is insufficient. Measure the correct amount of water with a
measuring cup.
The amount of yeast is insufficient. Measure the correct amount of yeast with a
measuring spoon.
The yeast is getting less active. Put the yeast in a sealed package and keep it in
the refrigerator.
The yeast is inactive. Do not keep the yeast at a high room
temperature.
The yeast is placed in contact with the water. Make sure to cover the yeast with the flour.
The room temperature is too high. (30°C or
higher) Use water at a temperature of 5°C or lower.
Timer-cooking is performed under a high
ambient temperature.
Chose a location with a lower temperature to
perform cooking.
The amount of flour and water is inappropriate. Measure the correct amount with a measuring
cup and scale.
The amount of ingredients is incorrect. Use the exact amount written in the operation
manual.
Baked with the "quick course". Choose the appropriate course to bake.
The inappropriate size is set. Make the correct setting.
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SD-253