A weak or missing vacuum will ruin your ceramic restorations. It causes cloudiness and poor structural integrity. If your Programat P90 displays vacuum error codes, follow this diagnostic sequence: Inspect the Hood and O-Ring Seals
If the external pump does not turn on at all during a cycle, use your multimeter to check the voltage at the pump outlet socket on the back of the furnace. If 120V/230V AC is not present when the vacuum stage initiates, the internal relay on the power PCB is faulty and must be desoldered and replaced. ivoclar programat p90 manual fixed
: Once the buzzer sounds, place your ceramic on the mount and press to begin the cycle. For official maintenance, Ivoclar recommends regular Silver Test A weak or missing vacuum will ruin your ceramic restorations