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PRE-
START-
UP
FIRE, EXPLOSION,
ELECTRICAL
SHOCK
HAZARD
Failure to follow this warning
could result in personal
injury
or death and/or property
damage.
1. Follo``v recognized
safety practices
and ``vear protective
goggles
``vhen checking
or servicing
refrigerant
systenr.
2. Do not operate
compressor
or provide
any electric
po``ver
to unit unless
compressor
ternrinal
cover
is in place and
secured.
3. Do
not
remove
compressor
terminal
cover
until
all
electrical
sources
are disconnected
and tagged.
4. Relieve
and recover
all refrigerant
from
system
before
touching
or disturbing
anything
inside
terminal
box
if
refrigerant
leak is suspected
around
compressor
terminals.
5. Never
attempt
to
repair
soldered
connection
while
refrigerant
system
is under pressure.
6. Do
not use torch
to remove
any component.
System
contains
oil and refrigerant
under pressure.
7. To remove
a component,
``vear protective
goggles
and
proceed
as follo``vs:
a. Shut off electrical power
to unit and install lockout
tag.
b. Relieve
and reclaim
all refrigerant
from
system
using both high-
and low-pressure
ports.
c. Cut component
connecting
tubing
with
tubing
cutter and remove
component
from unit.
d. Carefully
uns``veat remaining
tubing
stubs
when
necessary.
Oil can ignite when exposed
to flame.
Use the Start-Up
Checklist
supplied
at the end of this book
and
proceed as follows to inspect and prepare the unit for initial start-up:
1. Remove
all access panels.
2. Read and follow instructions
on all DANGER,
WARNING,
CAUTION.
and INFORMATION
labels
attached
to, or
shipped
``vith unit.
3. Make the follo``ving inspections:
a. Inspect
for shipping
and
handling
damages,
such
as
broken
lines, loose parts, disconnected
,,vires, etc.
b. Inspect for oil at all refrigerant
tubing connections
and on
unit base. Detecting
oil generally
indicates
a refrigerant
leak. Leak test all refrigerant
tubing
connections
using
electronic
leak detector,
or liquid-soap
solution.
If a
refrigerant
leak is detected,
see following
Check
for
Refrigerant
Leaks section.
c. Inspect
all field-
and factory-wiring
connections.
Be
sure that connections
are completed
and tight.
d. Ensure
``vires do not touch
refrigerant
tubing
or sharp
sheet metal edges.
e. Inspect
coil
fins.
If damaged
during
shipping
and
handling,
carefully
straighten
fins with a fin comb.
4. Verify the following
conditions:
a. Make sure that outdoor
fan blade is correctly
positioned
in fan orifice (See Fig. 19).
b. Make sure that condensate
drain pan and trap are filled
with water to ensure
proper drainage.
c. Make sure that all tools and miscellaneous
loose parts
have been removed.
5. Compressors
are internally
spring
mounted.
Do not loosen
or remove
compressor
holddown
bolts.
6. Each unit system has two Schrader-type
ports, one low-side
Schrader
fitting
located
on the
suction
line,
and
one
high-side
Schrader
fitting
located
on
the
compressor
discharge
line. Be sure that caps on the ports are tight.
START-UP
Step 1--Unit
Start-Up
NOTE:
Always
check high-
and low-voltage
supply
to the unit
components.
Check the integrity
of the plug receptacle
connections
and unit wiring harness
prior to assuming
a component
failure.
A. 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 the indoor fan ECM motor. This information
is also available
at the system UI in text with basic troubleshooting
instructions.
Careful
use of information
displayed
will reduce the
need for extensive
manual
troubleshooting.
Both
the Fan Coil and Heat Pump
(HP)/Air
Conditioner
(AC)
boards
have
an amber
LED
and a green
LED
located
near the
System Communications
connector
(ABCD)
(upper right center of
the Fan Coil board,
lower
right corner
of the HP/AC
board
as
installed
in the unit). The amber
LED is the System
Status LED.
labeled
STATUS.
The green LED, labeled
COMM,
is used as an
indicator
of system communications
status (See Fig 14-15).
Status
Codes
will be displayed
on the STATUS
LED
using
the
following
protocol:
1. The number
of short flashes indicates
first digit of code.
2. The number
of long flashes
indicates
second
digit of code.
3. A short flash is 0.25 seconds
on. A long flash is 1 second on.
4. The time between
flashes
is 0.25 seconds.
5. The time between
last short flash
and first long flash
is 1
second.
6. The LEDs will be off for 2.5 seconds
before repeating
code.
7. If multiple
status codes are active concurrently,
the highest
priority
status code is displayed.
On the Fan Coil board, a second
amber LED located at the bottom
center of the control board, adjacent to the motor harness plug, is the
motor status LED. labeled
MOTOR.
The motor
status LED will
flash during
normal blower
operation.
B. Control
Start-Up
and
System
Communications
Troubleshooting
On
power
up, green
COMM
LEDs
will be
turned
off until
successful
system
communications
are established
(this
should
happen
within
10 seconds).
Once communications
with
UI are
successful,
both COMM
LEDs will be lit and held on. At the same
time. amber
STATUS
LEDs will be lit and held continuously
on
until a request for operating
mode is received.
The STATUS
LED
will be on any time unit is in idle mode.
If, at any time. communications
are not successful
for a period
exceeding
2 minutes,
the Infinity control will only allow emergency
heating
or cooling
operation
using a common
thermostat
and the
terminal
strip
connections
on
the
two
control
boards
(see
Non-Communicating
Emergency
Cooling/Heating
Mode)
and
will display
Status
Code
16, System
Communication
Fault.
on
amber STATUS
LED. No further troubleshooting
information
will
be available
at UI until communications
are re-established.
If either COMM
LED does not light within proper time period and
status codes are not displayed;
1. Check system transfornrer
high-
and low-voltage
to be sure
the systenr is powered.
2. Check ABCD
connection
on both boards.
3. Check fuse on fan coil board to be sure it is not blown. If fuse
is open, check system wiring before replacing
it to be sure a
short does not cause a failure of replacement
fuse.
12
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