18 Maintenance/Cleaning/Inspection
18.4 Inspection
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:
–
–
–
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
Cooling air pressure (see requirements in
Cooling air hose (avoid sharp bend)
Burner throat or diffuser
Appendix
B)
117