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3.Place terry c loth shop t owel inside u nit i mmediately
under
component(s)
tobe serviced
and prevent lubricant run-offs
through the louvered openings
inthe unit b ase.
4.Perform required service.
5.Remove
and dispose ofany oil-contaminated
material per
local codes.
LIQUID-LINE
FILTER DRIER
The filter d rier i sspecifically
designed
tooperate
with Puron. Use
only factory-authorized
components.
Filter drier must bereplaced
whenever
tire refrigerant
system isopened.
When removing afilter
drier, use atubing c utter tocut t he drier f rom the system. Donot
uns'`veat
afilter drier f rom the system. Heat from uns'`veating
will
release
moisture
and contaminants
from drier i nto system.
PURON (R-410A) REFRIGERANT
CHARGING
Refer tounit i nformation
plate a nd charging
chart. Some R-410A
refrigerant
cylinders
contain
a dip
tube
to allow
liquid
refrigerant
to flow
fi'om
cylinder
in
upright
position.
For
cylinders equipped
with a dip tube, charge Puron units with cylinder
in upright
position
and a commercial
nmtering
device
in manifold
hose. Charge refrigerant
into suction
line.
TROUBLESHOOTING
LED DESCRIPTION
LEDs built into Infinity control boards provide
installer
or service
person information
concerning
operation
and/or fault condition
of
the unit controls
and ECM motor. This information
is also available
at the system
UI in text with basic
troubleshooting
instructions.
Careful
use of information
displayed
'`vill reduce
the
need for
extensive
manual
troubleshooting.
See section
B and Table 3, as
well as the UI instructions,
for additional
information.
Additional
Troubleshooting
information
can be found in Table 8.
MAJOR
COMPONENTS
2-STAGE
HP/AC
BOARD
Tire two-stage
HP/AC
control
board
controls
the
following
functions:
- Low-
and high-stage
compressor
operation
- Outdoor
tim motor operation
- Low ambient
cooling
- Crankcase
heater operation
- Compressor
external
protection
- Pressure
s'`vitch monitoring
- Time delays
FAN ('OIL
BOARD
The fan coil board controls
the follo'`ving
functions:
- Indoor fan operation
- Electric heat (if applicable)
SYSTEMS
COMMUNICATION
FAILURE
If communication
with the Infinity
Control
is lost
'`vith the
UI,
the controls
'`vill flash
the
appropriate
fault
codes.
Check
the
wiring to the UI, indoor
and outdoor
units.
MODEL
PLUG
Tire HP/AC
control
board
nmst
have
a valid
model
plug
to
operate.
If a valid model
plug is not detected,
it will not operate
and the control
will flash
the appropriate
fault code,
sho'`vn in
Table 3.
PRESSURE
SWITCH
PROTECTION
The unit is equipped
with high-
and lo'`v-pressure
s'`vitches. If the
control
senses the opening
of a high
or lo'`v pressure
switch,
it
will respond
as follows:
i. De-energize
the compressor
contactor
(HPS1
& LPS) or
the compressor
solenoid
contactor
(HPS2).
2. Keep the outdoor
fan operating
for 15 minutes.
3. Display
the appropriate
fault codes.
4. After a 15 minute
delay, if there is still a call for cooling
and the LPS or HPS is reset, the compressor
contactor
is
energized.
5. If LPS or HPS has not closed
after a 15 minute
delay, the
outdoor
fan is turned
off. If the open s'`vitch closes anytime
after the 15-minute
delay, then resunre
operation
'`vith 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
s'`vitch trip or high pressure
lockout,
check
the
refrigerant
charge,
outdoor
fan
operation
and outdoor
coil for airflo'`v restrictions.
8. In the event
of a low-pressure
s'`vitch trip or lo'`v pressure
lockout,
check the refrigerant
charge and indoor
airflow.
CONTROL
FAULT
If the HP/AC
control
board
has failed, the control
",','ill flash the
appropriate
fault code
(See Table 3).
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 3).
230V LINE (POWER
DISCONNECT)
DETECTION
If there is no 230v
at the compressor
contactor
when the unit is
powered
and cooling
demand
exists, the appropriate
error code is
displayed.
Verify that the disconnect
is dosed
and 230v wiring is
connected
to the unit.
COMPRESSOR
VOLTAGE
SENSING
The control
board
input
terminals
VS and L2 (See Fig.
15) are
used to detect
compressor
voltage
status,
and alert the user of
potential
problems.
The control
continuously
monitors
the high
voltage
on the run capacitor
of the compressor
motor.
Voltage
should be present
any time the compressor
contactor
is energized,
and
voltage
should
not
be
present
when
the
contactor
is
de-energized.
CONTACTOR
SHORTED
DETECTION
If there is compressor
voltage
sensed when there is no demand
for
compressor
operation,
the contactor
may be stuck dosed
or there
is a wiring error.
The control will flash the appropriate
fault code.
COMPRESSOR
THERMAL
CUTOUT
If the control
senses the compressor
voltage
after start-up,
and is
then absent
for 10 consecutive
seconds
while
cooling
demand
exists, the thermal
protector
is open.
The control
de-energizes
the compressor
contactor
for 15 minutes,
but continues
to operate
the
outdoor
fan.
The
control
Status
LED
'`vill flash
the
appropriate
code shown
in Table 3. After 15 minutes,
with a call
for
low
or high
stage
cooling,
the
compressor
contactor
is
energized.
If the thermal
protector
has not re-set,
the outdoor
fan
is turned
off.
If the call for cooling
continues,
the control
will
energize
the
compressor
contactor
every
15 minutes.
If the
thermal
protector
closes
(at the next 15 minute
interval),
check
the unit will resume
operation.
If the thermal
cutout
trips for three consecutive
cycles,
then unit
operation
is locked out for 4 hours and the appropriate
fault code
is displayed.
23
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