Zanussi LIBERO IWOKEC-1P/1ZT, Service Manual

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LIBERO LINE WOK INDUCTION
4.8.3.5 S4, COOKING TOP COUPLING
This test is made to check the quality of the coupling between pans and generator.
Execute Service Utility S4: Power supply v pot coupling rate.
During this test one pot must be present on one cooking zone (do not use empty pots as the appliance will
carry out a real functions test / fill them with water).
The test involves one cooking zone only. If pots are detected in more than one cooking zones at the same
time the test is performed in one zone only, randomly chosen. There is no indication on the U.I. of the cooking
zone used for the test.
A quick explanation of how this test works.
The test is done in three steps:
•
Step 1: The POW measures the main power supply voltage without load (zero power request).
•
Step 2: The maximum power (equivalent to level 10) is requested to the cooking area under test. Real
generated power is estimated measuring the current on the coil and a coupling factor is showed as:
Coupling factor % = (Estimated power / Requested power) %
Visualization is done as P
x :
P0
→
0% to 9% P5
→
50% to 59%
P1
→
10% to 19% P6
→
60% to 69%
P2
→
20% to 29% P7
→
70% to 79%
P3
→
30% to 39% P8
→
80% to 89%
P4
→
40% to 49% P9
→
90% to 100%
•
Step 3: Main power supply voltage is measured with the cooking zone under test at max power.
Refer also to § PERFORMANCE .
NOTE !
- The test works only with Tesla single-phase, generator , 3500W. With Foucault POB the test
apparently works but gives wrong values.