7. Check the color of the lens holder tip (hot terminal), and it must be light-gray. Darker
colors (like brown or violet) reveal the fiber optic has operated above the allowed
maximum temperature. In this case, investigate the following:
– Cooling air pressure (see requirements in Appendix B)
– Cooling air hose (avoid sharp bend)
– Burner throat or diffuser
8. Re-insert the inner carrier.
9. Relocate the unit to the mounting (thermal union).
10. If power supply was turned-off, then turn it on.
18.4 Inspection
Even if the SF910i has a powerful self-test capability, a small number of failures, not
related to safety are not automatically detected by the self-test. They are:
– Failure of the display
– Failure of LEDs
– Failure of the 4-20mA analog output (can be detected by the system that is connected
to it)
– Failure of one communication line (can be automatically detected by the master of
the network)
A periodic inspection of the above items can be scheduled at, for instance, 1 year period.
8VZZ005286 B 117
18 Maintenance/Cleaning/Inspection
18.4 Inspection
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