York YCUZ330A3, Установка, эксплуатация и обслуживание

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FORM 195.26-NM3
YORK INTERNATIONAL
51
Shutdowns which occured. The information is stored at
the instant of the fault regardless of whether the fault
caused a lockout to occur. The information is also not
affected by power failures (long term internal memory
battery back-up is built into the circuit board) or manual
resetting of a fault lock-out.
When the HISTORY key is pressed, a Printout is trans-
mitted of all system Operating conditions which were
stored at the “instant the fault occured” for each of the
3 SAFETY SHUTDOWN BUFFERS. There is one buffer
(storage area) for data related to each of the last 3
safety shutdowns.
The printout will begin with the most recent fault which
occured. The most recent fault will always be stored as
SAFETY SHUTDOWN NO. 1 (See printout Fig. 20).
Identically formatted fault information will then be printed
for SAFETY SHUTDOWN NO. 2 and SAFETY SHUT-
DOWN NO. 3.
Information contained in the SAFETY SHUTDOWN
BUFFERS is very important when attempting to trouble-
shoot a system problem. This data reflects the system
conditions at the instant the fault occured and often
reveals other system conditions which actually caused
the safety threshold to be exceeded (See Fig. 20).
NOTE: In actual printouts, this would be one continuous printout.
FIG. 20 – HISTORY PRINTOUT (TYPICAL)
LD00641