Carrier Infinity 480CEN024 Installation Instruction page 16

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4. Verify the following conditions:
a. Make sure gas line is free of air. Before lighting the unit
for the first time, perform the following with the gas valve
in the OFF position:
NOTE: If the gas supply pipe was not purged before connecting the
unit. it will be full of air. It is reconmmnded that the ground joint
union be loosened, and the supply line be allowed to purge until the
odor of gas is detected. Never purge gas lines into a combustion
chamber. Immediately upon detection of gas odor, retighten the
union. Allow 5 minutes to elapse, then light unit.
b. Make sure that condenser-fan blade is correctly
positioned in fan orifice. Top 1/3 of condenser-fan blade
should be within fan orifice venturi.
c. Ensure fan hub is positioned correctly with respect to
motor housing (See Fig. 15).
d. Make sure that air filter(s) is in place.
e. Make sure that condensate drain trap is filled with water
to ensure proper drainage.
f. 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
Schrader fitting located on the compressor discharge line. Be
sure that caps on the ports are tight.
A "
Infinity Top
UNIT SIZE
024
030
036
042
048
060
"A" DIMENSION
Infinity
25
25
24
24
24
19
Fig. 15 - Fan Blade Clearance
A06035
START-UP AND TROUBLESHOOTING
Step 1--Check for Refrigerant Leaks
Proceed as follows to locate and repair a refrigerant leak and to
charge the unit:
1. Locate leak and make sure that refrigerant system pressure
has been relieved and reclaimed from both high- and
low-pressure ports.
2. Repair leak following Refrigerant Service procedures.
NOTE: Install a filter drier whenever the system has been opened
for repair.
3. Add a small charge of R-410A refrigerant vapor to system
and leak test unit.
4. Evacuate and recover refrigerant from refrigerant system if
additional leaks are not found.
5. Charge unit with R-410A refrigerant, using a volumetric
charging cylinder or accurate scale. Refer to unit rating plate
for required charge. Be sure to add extra refrigerant to
compensate for internal volume of filter drier.
Step 2--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 assnnaing a component failure.
LED DESCRIPTION
LEDs built into Infinity" Control Board provide installer or service
person information concerning operation and/or fault condition of
the unit control and ECM motor. This information is also available
at the system User Interface in text with basic troubleshooting
instructions. Careful use of information displayed will reduce the
need for extensive manual troubleshooting.
The amber LED located at upper right side of control adjacent to
fuse is the system status LED and it is labeled STATUS. The green
LED labeled COMM is located adjacent to the STATUS LED, and
is used as an indicator of system communications status. 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 LED will be off for 2.5 seconds before repeating code.
CONTROL START-UP AND SYSTEM COMMUNICATIONS
TROUBLESHOOTING
On power up, green COMM LED will be turned off until successful
system communications are established (this should happen within
10 seconds). Once communications with User Interface are
successful, COMM LED will be lit and held on. At the same time.
amber STATUS LED 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 heating or
cooling operation using a common thermostat connected to the
standard 24V thermostat terminal strip connections and will display
Status (;ode 16. System Communication Fault, on amber STATUS
LED. No further troubleshooting information will be available at
User Interface until communications are re-established.
If COMM LED does not light within proper time period and status
code is not displayed:
1. Check system transformer high- and low-voltage to be sure
the system is powered.
2. Check fuse on control 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.
If COMM LED does not light within proper time period and status
code is displayed:
1. Check system wiring to be sure User Interface is powered
and connections are made A to A. B to B, etc. and wiring is
not shorted. Mis-wiring or shorting of the ABCD
communications wiring will not allow successful
communications.
NOTE: Shorting or mis-wiring low-voltage system wiring will not
cause damage to unit control or user interface but may cause low
voltage fuse to open.
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