INFICON Sensistor ILS500 Leak Detection System - Manual (Page 73)

Troubleshooting 73
ninb63e1-f (1410)
11.2.2 Interpretation of Hardware Test Results
Use the table below, to correct errors detected by the hardware test routine.
Tested Unit Tested Feature Reason for Error Action
Evacuation Valve Internal leaks Dirty or worn valve seals. Replace clean evacuation
valve.
Venturi Pump Maximum vacuum Compressed air pressure
too low or too high. See on
page 86. Adjust compressed air
pressure.
Dirt inside Venturi. Remove and clean
Venturi.
Dirty or broken Venturi
pilot valves. Replace two upper valves
in pilot ramp. See on page
77.
Dirty or broken Evacuation
pilot valves. Replace fourth valve from
bottom in pilot valve ramp.
See on page 77.
Gas Valve Manifold Leaks from outside Leaks to outside. Check for leaks with Hand
Probe (later in hardware
test sequence).
If no gas leaks. Check internal leaks in
tracer gas fill valve.
If no internal leaks in tracer
gas valve. Replace/clean vacuum
sensor protection valve.
Vacuum Sensor Protection
Valve Function No signal to pilot valve. Check ”Sensor Protect”
output.
Send in for repair.
Dirty or broken pilot valve. Replace valve third valve
from bottom in pilot ramp.
Vacuum sensor protection
valve broken. Replace valve.