Please follow all safety procedures prior to working on elevator equipment.
Wear your ground strap. This keeps components from being damaged due to static discharge.
Remove Suspect Triac
Carefully examine and remove suspect triac. Avoid forcefully bending or twisting triac from its base.
It may have melted in the base.
Take reading from end pins
Placy component on an insulated surface for proper testing.
Take reading with ohmeter. Read from end to end pin. Reading should never read continuity.
This type triac measures low ohms approximately 372 ohms.
Take Reading from middle to end pins.
Take reading with ohmeter from middle pin or metal base to each of the end pins.
Your readings should read very high megs or open . Continuity is a sign of as bad triac.