K-Patents DD-23 - Manual (Page 32)

28
7.4 Malfunction logic
Timeout from
instrument?
Malfunction in
instrument?
no
yes
yes
yes
no
no
Critical malfunc-
tion in instr.?
NO
MALFUNCTION
Remove instr.
from Divert use
MALFUNCTION
Figure 7.4 Malfunction logic (repeated for each sensor)
The MALFUNCTION light is illumi-
nated when the internal diagnos-
tics of either of the two instru-
ments indicates a malfunction or
there is a communication timeout
to either of the instruments (Fig-
ure 7.4).
It should be noted that not all mal-
functions are critical malfunctions
which drop the instrument from
operation (see Section 7.3). For a
complete list of possible malfunc-
tions, see Section 6.2.
The MALFUNCTION light re󰅮lects the
decision taken by this logic. How-
ever, as the
MALFUNCTION light is
one of the resettable alarms, it
may be blinking even when the
malfunction itself is cleared if the
ALARM RESET button has not been
pressed (see Section 7.5).