Installation guide
TROUBLESHOOTING
If
the
compressor
fails
to
operate
with
a
cooling
call,
Table
4
can
be
used
to
verify
if
there
is
any
damage
to
the
compressor
windings
causing
system
malfunction.
Table
4
—
Winding
Resistance
Winding
resistance
at
70°F
+/-
20°F
(21.11°C
+/—
11.11°C)
Winding
24ANB724
24ANB736 24ANB748
24ANB760
/ / / /
24ANB124 24ANB136 24ANB148 24ANB160
Start
($—C)
1.64 1.52 1.86
1.63
Run
(R—-C)
1.30
0.88 0.52 0.39
Systems
Communication
Failure
If
communication
with
the
Infinity
Control
is
lost
with
the
user
interface,
the
control
will
flash
the
appropriate
fault
code.
(See
Table
6)
Check
the
wiring
to
the
User
Interface,
indoor
and
outdoor
units.
Model
Plug
Each
control
board
contains
a
model
plug.
The
correct
model
plug
must
be
installed
for
or
the
system
to
operate
properly
(see
Table
5).
Table
5
—
Model
Plug
Model Model
Plug
ewe
Ome)
Number Number
Pind-4
Pin2d-3
24ANB724
Hk70EZ040
18
75
24ANB736
Hk70EZ042
18
120
24ANB748
Hk70EZ044
18
180
24ANB760
Hk70EZ046
18
270
24ANB124
Hk70EZO09
5.1
91
24ANB136
Hk70EZ011
5.1
150
24ANB148
Hk70EZ013
5.1
220
24ANB160
Hk70EZ015
5.1
360
The
model
plug
is
used
to
identify
the
type
and
size
of
unit
to
the
control.
On
new
units,
the
model
and
serial
numbers
are
input
into
the
board’s
memory
at
the
factory.
If
a
model
plug
is
lost
or
missing
at
initial
installation,
the
unit will
operate
according
to
the
information
input
at
the
factory
and
the
appropriate
error
code
will
flash
temporarily.
An
RCD
replacement
board
contains
no
model
and
_
serial
information.
If
the
factory
control
board
fails,
the
model
plug
must
be
transferred
from
the
original
board
to
the
replacement
board
for
the
unit
to
operate.
NOTE:
The
model
plug
takes
priority
over
factory
model
information
input
at
the
factory.
If
the
model
plug
is
removed
after
initial
power
up,
the
unit will
operate
according
to
the
last
valid
model
plug
installed,
and
flash
the
appropriate
fault
code
temporarily.
Pressure
Switch
Protection
The
outdoor
unit
is
equipped
with high
and
low
pressure
switches.
If
the
control
senses
the
opening
of
a
high
or
low
pressure
switch,
it
will
respond
as
follows:
1.
De-energize
the
appropriate
compressor
contactor,
2.
Keep
the
outdoor
fan
operating
for
15
minutes,
3.
Display
the
appropriate
fault
code
(see
Table
6).
fs
.
After
a
15
minute
delay,
if
there
is
still
a
call
for
cooling
and
the
LPS
or
HPS
is
reset,
the
appropriate
compressor
contac-
tor
is
energized.
5. If
LPS
or
HPS
has
not
closed
after
a
15
minute
delay,
the
outdoor
fan
is
turned
off.
If
the
open
switch
closes
anytime
after
the
15
minute
delay,
then
resume
operation
with
a
call
for
cooling.
6.
If
LPS
or
HPS
trips
3
consecutive
cycles,
the
unit
operation
is
locked
out
for
4
hours.
7.
In
the
event
of
a
high
pressure
switch
trip
or
high
pressure
lockout,
check
the
refrigerant
charge
outdoor
fan
operation
and
outdoor
coil
for
airflow
restrictions.
8.
In
the
event
of
a
low
pressure
switch
trip
or
low
pressure
lockout,
check
the
refrigerant
charge
and
indoor
airflow.
Control
Fault
If
the
outdoor
unit
contro!
board
has
failed,
the
contro!
will
flash
the
appropriate
fault
code.
(See
Table
6)
The
control
board should
be
replaced.
Brown
Out
Protection
If
the
line
voltage
is
less
than
187v
for
at
least
4
seconds,
the
appropriate
compressor
contactor
and
fan
relay
are
de-energized.
Compressor
and
fan
operation
are
not
allowed
until
voltage
is
a
minimum
of
190v.
The
control
will
flash
the
appropriate
fault
code
(see
Table
6)
230
V
Brown
Out
Protection
Defeated:
The
brownout
feature
can
be
defeated
if
needed
for
severe noisy
power
conditions.
This
defeat
should
always
be
a
last
resort
to
solving
the
problem.
Defeat
is
available
on
the
User
Interface
setup
screen
(available
with
SYSTXBBUIDO1-C
UI)
or
can
be
initiated
through
the
forced
defrost
pins
for
non-communicating
systems
as
follows:
The
brownout
toggle
is
accomplished
by
shorting
the
defrost
pins
from
power
up
with
the
OAT
and
OCT
sensor
connector
removed.
After
3
seconds,
the
status
of
the
force
defrost
short
and
the
OAT/OCT
as
open
will
be
checked.
If
correct,
then
the
brownout
will
be
toggled.
¢
Status
code
6
shows
the
brownout
is
disabled.
*
Status
code
5
shows
the
brownout
is
active.
After
the
brownout
defeat
is
set,
power
down
and
reinstall
the
OAT/OCT
sensor
and
remove
the
short
from
the
forced
defrost
pins.
As
long
as
the
short on
the
forced
defrost
remains,
the
OAT
and
OCT
faults
will
not
be
cleared.
The
code
will
continue
to
be
flashed.
The
control
is
shipped
with
the
brownout
active.
The
change
in
status
is
remembered
until
toggled
to
a
new
status.
A
power
down/power
up
sequence
will
not
reset
the
status.
It
may
be
necessary
to
do
the
toggle
twice
to
cycle
to
the
desired
state of
the
defeat.
230V
Line
(Power
Disconnect)
Detection
If
there
is
no
230v
at
the
compressor
contactor(s)
when
the
indoor
unit
is
powered
and
cooling
demand
exists,
the
appropriate
error
code
is
displayed
(see
Table
6).
Verity
that
the
disconnect
is
closed
and
230v
wiring
is
connected
to
the
unit.
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