Outdoor Coil, Indoor Coil, And Condensate Drain Pan; Outdoor Fan; Electrical Controls And Wiring; Refrigerant Circuit - Carrier 50SD030 Installation Instructions Manual

OUTDOOR COIL, INDOOR COIL, AND CONDENSATE
DRAIN PAN
Inspect the condenser coil, evaporator coil, and condensate drain
pan at least once each year.
The coils are easily cleaned when dry; therefore, inspect and clean
the coils either before or after each cooling season. Remove all
obstructions, including weeds and shrubs, that interfere with the
airflow through the condenser coil.
Straighten bent fins with a fin comb. If coated with dirt or lint, clean
the coils with a vacuum cleaner, using the soft brush attachment. Be
careful not to bend the fins. If coated with oil or grease, clean the
coils with a mild detergent and water solution. Rinse coils with clear
water, using a garden hose. Be careful not to splash water on motors,
insulation, wiring, or air filter(s). For best results, spray condenser
coil fins from inside to outside the unit. On units with an outer and
inner condenser coil, be sure to clean between the coils. Be sure to
flush all dirt and debris from the unit base.
Inspect the drain pan and condensate drain line when inspecting the
coils. Clean the drain pan and condensate drain by removing all
foreign matter from the pan. Flush the pan and drain trough with
clear water. Do not splash water on the insulation, motor, wiring, or
air filter(s). If the drain trough is restricted, clear it with a "plumbers
snake" or similar probe device.

OUTDOOR FAN

CAUTION
!
UNIT OPERATION HAZARD
Failure to follow this caution may result in damage to unit
components.
Keep the condenser fan free from all obstructions to ensure
proper cooling operation. Never place articles on top of the
unit.
1. Remove 6 screws holding outdoor grille and motor to top
cover.
2. Turn motor/grille assembly upside down on top cover to
expose fan blade.
3. Inspect the fan blades for cracks or bends.
4. If fan needs to be removed, loosen setscrew and slide fan off
motor shaft.
5. When replacing fan blade, position blade so that the hub is
1/8 in. away from the motor end (1/8 in. of motor shaft will
be visible) (See Fig. 12).
6. Ensure that set screw engages the flat area on the motor shaft
when tightening.
7. Replace grille.

ELECTRICAL CONTROLS AND WIRING

Inspect and check the electrical controls and wiring annually. Be
sure to turn off the electrical power to the unit.
Remove access panel to locate all the electrical controls and wiring.
Check all electrical connections for tightness. Tighten all screw
connections. If any smoky or burned connections are noticed,
disassemble the connection, clean all the parts, re- -strip the wire end
and reassemble the connection properly and securely.
After inspecting the electrical controls and wiring, replace all the
panels. Start the unit, and observe at least one complete cooling
cycle to ensure proper operation. If discrepancies are observed in
operating cycle, or if a suspected malfunction has occurred, check
each electrical component
instrumentation. Refer to the unit wiring label when making these
checks.

REFRIGERANT CIRCUIT

Inspect all refrigerant tubing connections and the unit base for oil
accumulation annually. Detecting oil generally indicates a
refrigerant leak.
WARNING
!
EXPLOSION, PERSONAL INJURY HAZARD
Failure to follow this warning could result in property
damage, personal injury or death.
System under pressure. Relieve pressure and recover all
refrigerant before system repair or final unit disposal. Use all
service ports and open all flow- -control devices, including
solenoid valves.
If oil is detected or if low performance is suspected, leak test all
refrigerant tubing using an electronic leak detector, or liquid- -soap
solution. If a refrigerant leak is detected, refer to Check for
Refrigerant Leaks section.
If no refrigerant leaks are found and low performance is suspected,
refer to Checking and Adjusting Refrigerant Charge section.

INDOOR AIRFLOW

The cooling airflow does not require checking unless improper
performance is suspected. If a problem exists, be sure that all
supply- - and return- -air grilles are open and free from obstructions,
and that the air filter is clean.

METERING DEVICES- -ACCURATER PISTON

This metering device is a fixed orifice and is contained in the brass
body in the liquid line feeding the indoor coil.

TROUBLESHOOTING

Refer to the Troubleshooting Chart (Table 6) for troubleshooting
information.

START- -UP CHECKLIST

Use the Start- -Up Checklist at the back of this manual.
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with the proper electrical