Garland SH/BA 3500, Service Manual

Page: 10 / 28

Service-Manual, new version author: Chr. Fuchs 17.06.99 / INDUCS Ltd. 18.09.03 page 10 of 28
5.5
Fan
ATTENTION
The heating area is warmed by the hot pan. In order to avoid injuries
(burnings), do not touch the heating area.
With this test, fan, fan observer as well as the degree of soiling are verified. At the beginning of the
test, the induction cooker should be cold. You need a pan with a bottom diameter of >28cm or a
Wok pan.
Step Action Level Result
1 Put a pan on the heating area and fill it up
with some litres of water 12 heat
2 Measure the time until the fan starts
working 12 The fan should start working
after 6-8 minutes
3 Go on cooking for about 30 minutes 12 The heating process may not
be interrupted (indicator
lamp) The fan may
repeatedly start and stop.
4 Stop the induction cooker 0 The fan stops immediately
5.6 Test components
CAUTION
The mains cable must be switched off.
5.6.1 Power board
The function of the transistor modul and of the rectifier are verified.
Rectifier (picture 1)
Conducting-state voltage Diode U
+
= 0,5V: if all conducting-state voltages show approx. 0.5 V, the
rectifier is working.
A short circuit between ‚+‘ and ‚-‚ means that the transistor module is defective.
Transistor module (picture 2)
Conducting-state voltage Diode U
+
= 0.4 V: if all conducting-state voltages show approx.0.4 V, the
transistor module is working. A short circuit between C2-E2, C1-E1 and C1-2 means that the
transistor module is defective.
If the rectifer and/or the transistor module seem to be defective, separate the power board
C016/C031 from heat sink and verify the rectifier and the transistor module without connection.