Hybrid
Vertical
Stack
–
Installation
Operation
Maintenance
Manual
OPERATION
‐
DETAILED
R090303
Installation
Operation
Maintenance
Manual
is
subject
to
change
without
notice
Page
13
operation
until
the
controls
are
powered
down
for
at
least
20
seconds,
while
a
soft
lockout
is
a
compressor
shutdown
that
will
be
restored
once
the
conditions
causing
the
shutdown
have
been
rectified.
d.
During
compressor
operation,
refrigerant
temperature,
system
fluid
temperature
and
discharge
air
temperature
are
continuously
monitored.
If
the
refrigerant
temperature
drops
below
35
°
F,
compressor
operation
will
be
disabled.
After
10
minutes
an
auto
reset
occurs
and
the
compressor
will
be
enabled
as
soon
as
the
temperature
rises
above
60
°
F.
Actual
compressor
restart
will
be
delayed
a
minimum
of
5
minutes
by
the
anti
‐
recycle
timer.
A
flash
code
of
2
will
be
initiated
upon
a
low
refrigerant
temperature
shutdown.
e.
If
the
outgoing
system
fluid
temperature
rises
above
140
°
F,
compressor
startup
will
be
disabled.
After
10
minutes
an
auto
reset
occurs
and
the
compressor
will
be
enabled
as
soon
as
the
temperature
drops
below
115
°
F.
The
outgoing
system
fluid
sensor
is
mounted
on
the
leaving
fluid
pipe.
Actual
compressor
restart
will
be
delayed
a
minimum
of
5
minutes
by
the
anti
‐
recycle
timer.
A
flash
code
of
3
will
be
initiated
upon
a
high
outgoing
system
fluid
temperature
shutdown.
f.
If
the
discharge
air
temperature
drops
below
50
°
F
compressor
operation
will
be
disabled.
After
10
minutes
an
auto
reset
occurs
and
the
compressor
will
be
enabled
as
soon
as
the
temperature
rises
above
60
°
F.
The
discharge
air
temperature
sensor
is
mounted
on
the
fan
housing.
Actual
compressor
restart
will
be
delayed
a
minimum
of
5
minutes
by
the
anti
‐
recycle
timer.
A
flash
code
of
4
will
be
initiated
upon
a
low
discharge
air
temperature
shutdown.
g.
The
condensate
level
sensor
is
a
100
ohm
thermistor
that
is
heated
for
15
seconds
every
4
minutes.
Its
temperature
is
measured
at
the
beginning
of
the
heat
cycle,
and
again
at
the
end
of
the
heating
cycle.
If
the
condensate
level
rises
above
the
sensor
it
will
not
warm
up
during
the
warm
up
cycle,
and
the
temperature
change
will
be
insignificant.
It
is
this
lack
of
temperature
change
that
the
controller
sees
as
an
impending
condensate
overflow.
When
high
condensate
level
is
detected,
compressor
operation
is
immediately
terminated,
and
at
the
same
time
the
fan
is
stopped
for
30
seconds,
and
then
restarted.
At
this
time
a
flash
code
of
7
will
be
intiated.
The
4
minute
cycle
will
continue
until
the
cooling
call
is
no
longer
in
place.
If
the
condensate
level
drops
below
the
sensor,
compressor
operation
will
be
returned
to
normal.
However,
if
the
condensate
level
stays
above
the
sensor
for
more
than
15
minutes,
the
fault
alarm
will
be
triggered.
This
fault
signal
will
automatically
reset
once
the
condensate
level
goes
below
the
sensor.
