Hi,
I'm trying to repair an old Thomson Australe 2 washing machine that turns on but the programs don't start. The troubleshooting guide has a procedure to display the last error detected by the controller, and it points to a shorted triac driving the motor.
The board looks good, with no burned or cracked component. The triac is mounted on a heatsink, it's a ST BTB15 600BCE. I've tested it in circuit and there is 52mV drop and 42 Ohm between A1 and G. A1-A2 and A2-G are open, with a > 1M Ohm resistance.
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Is this enough to confirm that the triac is indeed bad?
I searched on the ST site and this reference no longer exists, there is a
datasheet archived but it doesn't mention the BCE variant. The closest match seems to be the BTB16 which is rated for 16A instead of 15A. However for 600V there are several variants (SWRG, CWRG, BWRG, BRG, CRG) and I don't know which one to pick (if that matters in this case).