CHAPTER3
Most program relays have
the
capability
to
self diagnose
and
to
display a code or
message that indicates
the
failure condi
..
tion. Refer to
the
control bulletin for
specifics and suggested remedies.
Familiarity with
the
program relay
and
other controls
in
the system
can
be
ob-
tained
by
studying
the
contents of
the
manual
and
this
bulletin.
Knowledge
of
the
system
and
its
controls
will
make
troubleshooting
much
easier
in
the
event
it
is
necessary. Costly
down
·
time
or delays can be prevented
by
sys-
tematic checks
of
the
actual operation
against
the
normal sequence to determine
the
stage
at
which performance deviates
from
normal. Following a routine
may
750-150
SEQUENCE OF OPERATION
possibly eliminate overlooking
an
ob-
vious condition, often one that
is
relative~
ly
simple to correct.
Remember that this
is
a safety device
and
for
the most part
it
is
doing
its
job when
it
shuts down or refuses to operate.
~
attempt to circumvent
any
of
the
safety
features.
Preventive maintenance
and
scheduled
inspection of
all
comJX>nents
should
be
followed. Periodic checking of
the
relay
to see that a safety lockout
will
occur
under conditions of failure
to ignite either
pilot
of
main
flame
or
from
loss
of
flame
is
recommended.
CHAPTER
3-11
To Next Page
Loading...
