What to do if the KB2-Ld17 mains presence LED is not lit on my Villa ARCOVIS 3000 S?
- KKenneth DanielAug 4, 2025
If the KB2-Ld17 mains presence LED is not lit after plugging in your Villa Medical Equipment, here's what you should check: * Ensure the SWL1 automatic switch is in the “I” position. * Verify that mains voltage is present at the mains plug. * Check the integrity of the B1-F1 fuse. * Confirm mains voltage is present on S1-J1. * Inspect the integrity of the mains plug. * Check that LD1 and LD2 (green) are lit on the B1 board. * Verify the S1 output voltage on the J2 pin 1 and 5: +24Vdc (±0,5V). The possible cause may be a missing mains voltage, a faulty mains plug, or a faulty S1 power supply. Also, make sure that the automatic switch is not on the “0” position.