Carrier 48XL Outdoor Coil, Indoor Coil, and Condensate Drain Pan, Outdoor Fan, Indoor Airflow

Page 29

ELECTRICALSHOCKHAZARD

Failureto follow this warning could result in personal injury or death.

Disconnect and tag electrical power to the unit before cleaning and lubricating the blower motor and wheel.

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

UNIT OPERATION HAZARD

Failure to follow this caution may result in damage to unit components.

Keep the outdoor fan free from all obstructions to ensure

proper cooling operation, Never place articles on top of the unit,

1.Remove 4 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 according to the table shown in Fig. 24.

6.Ensure that set screw engages the flat area on the motor shaft when tightening.

7.Replace grille.

infinity

Top

 

 

 

A06035

UNIT SIZE

"A" DIM. IN. (MM)

024

1

(26)

030

1

(26)

036

1

(26)

042

1

(26)

048

11/32

(9)

060

9/16

(14)

Fig. 24 - Outdoor

Fan Blade Clearance

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 with the proper electrical

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.

If oil is detected or if low performance is suspected, leak test all

refrigerant tubing using an electronic leak detector, or liquid-so@

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 heating and/or 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.

Pressure Switches - Refrigerant Circuit

Pressure switches are protective devices integrated into the control

circuit (low voltage). They shut off compressor if abnormally high

or low pressures are present in the refrigeration circuit. These

pressure switches are specifically designed to operate with Puron

(R-410A) systems. R-22 pressure switches must not be used as

replacements for the Puron (R-410A) system.

Loss-of-Chame (Low Pressure) Switch

This switch is located on the liquid line and protects against low

suction pressures caused by such events as loss of charge, low airflow across indoor coil, dirty filters, etc. It opens if the system pressure drops to about 20 psig. If system pressure is above this, switch should be closed.

Hi_h-Pressure Switches (HPS & HPS2)

The high-pressure switches are located on the discharge line and

protects against excessive condenser coil pressure. HPS opens at

29

Image 29
Contents Installation Electricalshockhazard Unit Operation and Safety HazardIdentify Unit Inspect ShipmentIN.MM IN. MMNumber 024-030Left Side View Frontview Rightsideview Front View Furnace Section CompressorsBurner Orifice No. Qty.Drill Size RETURN-AIR Filters ThrowawayPlace ClearancesSelect and Install Ductwork See Detail a Install Gas Piping Install Flue HoodProvide for Condensate Disposal Carbon Monoxide Poisoning HazardFire or Explosion Hazard Install Electrical ConnectionsHIGH-VOLTAGE Connections Electrical Shock HazardConnecting Ground Lead to Ground Screw Routing Power Leads Into UnitRouting Control Power Wires Accessory InstallationGround Screw Field Connection OAT Black WiresRequired Factory ConnectedFIRE, EXPLOSION,ELECTRICALSHOCK Hazard Unit Start-Up and TroubleshootingMotor Turns Slowly Verify Motor Winding SectionDUSO0003 DU500095 Status Code 23 Pressure Switch did not Open Status Code 22 Abnormal FLAME-PROVING SignalStatus Code 25 Invalid Model Selection or Setup Error Status Code 33 Limit Circuit FaultUnit Operation Hazard Indoor Airflow AdjustmentsAIR Conditioner Sequence of Operation Cooling Operation Utility Interface with Infinity ControlHigh Stage Low Stage Amber LED Operation Fault Flash Possible Cause Action CodeRated Heating GAS Heat Mode and Adjustments Dehumidification ModeInfinity Controlled LOW Ambient Cooling Sequence of OPERATION-GAS HeatU.S.A Fire and Unit Damage HazardCanada ExampleCheck Burner Flame Check GAS Input Propane GASCheck for Refrigerant Leaks Start-Up AdjustmentsRefrigerant Charge To USE Cooling Charging ChartsNo Charge LOW Charge CoolingFactorywiresprovided Field Connection Required BlackwiresIndoor Fan and Motor Limit SwitchBurner Ignition Main BurnersPressure Switches Refrigerant Circuit Electrical Controls and WiringOutdoor Coil, Indoor Coil, and Condensate Drain Pan Outdoor FanRefrigerant System Control Fault Pressure Switch PROTECTION-REFRIGERANT230V Line Power Disconnect Detection Temperature ThermistorsOCT Failed Thermistor Default OperationThermistor Sensor Comparison Page Remedy SymptomTable lO--Troubleshooting Chart Cont-Gas Remove and Store in Job File