Panasonic SR-W18GSLRA, Service Manual

10

5 Test Mode

Judging Method of Defective Parts

5.1.

Bubbling Test

Put the pan in the cooker body and turn it lightly right-and-leftwards in order to allow the pan to properly contact the heating plate.

1. Put water in the pan to barely cover the center of the pan bottom, and turn on the cooking switch after the lid is placed.
2. When water has started boiling to issue steam, remove the lid and check the bubbling condition of  the pan bottom

immediately.

3. If bubbling takes place uniformly around the circumference of the pan bottom as shown in the figure, the cooker is considered

free from trouble. However, if more than 1/4 of the pan circumference is not bubbling as shown in the righthand figure, the
cooker is considered defective. Since the cause for this defect lies in poor contact of the pan buttom with the cooking heater,
check if no foreign matter exists on the pan bottom or the cooking heater and if foreign matter is found, remove it or replace
the parts.

5.2.

Evaporation Test

1. After satisfactory bubbling is confirmed, remove the lid and put a weight on the cooker.

Caution: To prevent heat distortion of plastic parts due to steam, be sure to fully open the lid.

2. Cover the entire pan bottom with 2 or 3 pieces of tissue paper (or gauze), and turn on the switch subsequently.

Caution: To prevent the tissue paper from being lifted by bubbling, make some holes in the paper beforehand.

3. The cooker is considered acceptable it the timing when steam generation comes to a stop after water of the pan bottom has

evaporated, is within 1 minute before and after the cooking switch is turned off.

If these requirments are not satisfied, check the center  thermostat as well as the contacted condition between the pan bottom
and the cast heater, and then repair or replace the parts.