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Check
Charge
Factory
charge amount
and desired subcooling
are shown
on unit
rating
plate.
Charging
method
is shown
on information
plate
inside unit. To properly
check
or adjust charge,
conditions
must
be favorable
for subcooling
charging.
Favorable
conditions
exist
when
the
outdoor
temperature
is between
70°F
and
100°F
(21.11°C
and 37.78°C),
and the indoor
temperature
is between
70°F
and 80°F
(21.11°C
and 26.67°C).
Follow
the procedure
below:
Unit is factory charged
for 15ft (4.57 m) of lineset. Adjust charge
by adding or removing
0.6 oz/fl of 3/8 liquid line above or below
15fl (4.57 m) respectively.
For standard
refrigerant
line lengths
(80 fl/24.38
m or less), allow
system
to operate
in cooling
mode
at least
15 minutes.
If
conditions
are favorable,
check
system
charge
by subcooling
method.
If any adjustment
is necessary,
adjust charge slowly
and
allow
system
to
operate
for
15 minutes
to
stabilize
before
declaring
a properly
charged
system.
If the
indoor
temperature
is above
80°F
(26.67°C),
and
the
outdoor
temperature
is in the
favorable
range,
adjust
system
charge
by weight
based
on line
length
and
allow
the indoor
temperature
to drop
to 80°F
(26.67°C)
before
attempting
to
check system charge by subcooling
method
as described
above.
If the
indoor
temperature
is below
70°F
(21.11°C),
or the
outdoor
temperature
is not in the favorable
range,
adjust charge
for line set length
above
or below
15fl (4.57
m) only.
Charge
level should
then be appropriate
for the system
to achieve
rated
capacity.
The charge level could
then be checked
at another
time
when
the both
indoor
and outdoor
temperatures
are in a more
favorable
range.
NOTE:
If line length
is beyond
80 ft (24.38
m) or greater
than
20 ft (6.10
m) vertical
separation,
See Long Line Guideline
for
special
charging
requirements.
Heating
Check
Chart
Procedure
To check
system
operation
during
heating
cycle,
refer
to the
Heating
Check
Chart
on outdoor
unit.
This
chart
indicates
whether
a correct
relationship
exists
between
system
operating
pressure
and air temperature
entering
indoor
and outdoor
units. If
pressure
and
temperature
do
not
match
on
chart,
system
refrigerant
charge may not be correct.
Do not use chart to adjust
refrigerant
charge.
GENERAL
SEQUENCE
OF
OPERATION
STANDARD
THERMOSTAT
Turn on power to indoor and outdoor units. Transformer
is
energized with power supplied.
Cooling
On
a
call
for
cooling,
a
standard
thermostat
(non-communicating)
makes circuits R-O and R-Y and R-G.
Circuit R-O energizes reversing valve, switching it to cooling
position. Circuit R-Y energizes contactor, starting outdoor fan
motor and compressor circuit. R-G energizes indoor unit blower
relay, starting indoor blower motor on high speed.
When a standard thermostat (non-communicating)
is satisfied, its
contacts
open,
de-energizing
contactor
and
blower
relay.
Compressor and motors should stop.
NOTE:
If indoor unit is equipped with a time-delay relay circuit,
the indoor blower will run an additional 90 seconds to increase
system efficiency.
Heating
On a call for heating
a standard
thermostat
(non-communicating)
makes
circuits
R-Y
and R-G.
Circuit
R-Y
energizes
contactor,
starting
outdoor
fan
motor
and
compressor.
Circuit
R-G
energizes
indoor
blower
relay, starting
blower
motor
on high
speed.
Should
temperature
continue
to fall,
R-W2
is made
through
second-stage
room thermostat.
Circuit
R-W2
energizes
a relay,
bringing
on first bank of supplemental
electric
heat and providing
electrical
potential
to second
heater
relay
(if used).
If outdoor
temperature
falls
below
setting
of outdoor
thermostat
(factory
installed),
contacts
close to complete
circuit and bring on second
bank of supplemental
electric
heat.
When
thermostat
is satisfied,
its contacts
open,
de-energizing
contactor
and relay. All heaters
and motors
should
stop after all
fan off delays.
HEAT PUMP
SYSTEM
FUNCTIONS
AND SEQUENCE
OF OPERATION
The outdoor
unit
control
system
has
special
functions.
following
is an overview
of the control functions.
SEQUENCE
OF OPERATION
Cooling
& Heating
Operation
This
product
utilizes
either
a standard
indoor
thermostat
or
Infinity
communication
User Interface.
With a call for cooling,
the outdoor
fan, reversing
valve,
and compressor
are energized.
When
the cooling
demand
is satisfied,
the compressor
and fan
will shut off. The reversing
valve will remain
energized
until the
control board power is removed
or a call for heating
is initiated.
NOTE:
The outdoor
fan motor will continue
to operate
for one
minute
after compressor
shuts
off, when
the outdoor
ambient
is
greater
than or equal to 100°F/37.78°C.
With
a call for heating,
the outdoor
fan and
compressor
are
energized.
The
reversing
valve
is de-energized
in the
heating
mode.
The
Communication
and
Status
Function
Lights
Green Communications
(COMM)
Light
(Infinity
Control
only)
A green LED (COMM
light) on the outdoor
board
(see Fig. 12)
indicates
successful
communication
with
the
other
system
products.
The green LED will remain
OFF until communications
is established.
Once a valid command
is received,
the green LED
will turn
ON continuously.
If no communication
is received
within 2 minutes,
the LED will be turned OFF until the next valid
communication.
Amber
Status
Light
An amber colored
STATUS
light is used to display
the operation
mode
and fault codes as specified
in the troubleshooting
section.
See Table 3 for codes and definitions.
NOTE:
Only one fault code will be displayed
on the outdoor
unit control
board
(the most
recent, with the highest
priority).
Crankcase
Heater
Operation
The crankcase
heater
(when
applicable)
is energized
during
the
off cycle below
65 ° F/I 8.33 ° C.
Outdoor
Fan Motor
Operation
The outdoor
unit control
energizes
outdoor
fan any
time
the
compressor
is operating
(except
defrost
and intermittently
during
low ambient
cooling).
The outdoor
fan remains
energized
for 15
minutes
if a pressure
switch
or compressor
thermal
protector
should open.
Outdoor
fan motor will continue
to operate
for one
minute
after the compressor
shuts off when the outdoor
ambient
is greater than or equal to 100°F/37.78°C.
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