Carrier T--298 service manual Upper Scroll Assembly Locking Tabs b. & Screw Locations c

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3.6SERVICE -- UPPER UNIT -- LOW PROFILE 3.6.1 Exterior Cover Removal

CAUTION

Coil fins are sharp. Use care when removing the cover form the base pan to avoid per- sonal injury.

To remove the exterior cover, do the following:

a. Before working on unit place the master switch in the OFF position and disconnect all electrical power.

b. Remove (8) screws securing the unit cover to the base pan assembly. See Figure 3-26.

c.Carefully lift the exterior cover off of the unit base pan assembly.

d.Reverse above procedure for reassembly.

b.b.

b.

b.

c.

b.

b.

Screws

Screws

Figure 3-26 Cover Assembly -- Low Profile 3.6.2 Upper Scroll Assembly Removal

To remove the upper scroll assembly, do the following:

a.Remove exterior cover assembly. Refer to paragraph 3.6.1.

b.Release the (2) front, (2) rear, (1) left side and (1) right side locking tabs (See Figure 3-27) by pulling back on the tabs (See Figure 3-28).

c.Remove the screw (1) from the control box cover (See Figure 3-27).

d.With all (6) locking tabs released and control box screw removed, lift the upper scroll assembly off of the lower scroll assembly.

e.Reverse above procedure for reassembly. Ensure all

(6) locking tabs snap shut & lock.

Figure 3-27 Upper Scroll Assembly

Locking Tabs (b.) & Screw Locations (c.)

Figure 3-28 Upper Scroll Assembly

Keeper Tab Release

T--298

3-10

Image 34

Contents Model AirV AirV Operating Precautions Safety SummaryGeneral Safety Notices Maintenance PrecautionsSpecific Warning and Caution Statements Specific Warnings and CautionsSafety 298 Table of Contents Table of Contents List of Figures Figure NumberList of Tables Table NumberSerial Number Identification Section DescriptionIntroduction Design Change DescriptionsUpper Unit Roof Ceiling UnitMANUAL--FORM no Equipment Covered Type of Manual Additional Support ManualsFor Part no Ceiling Unit Component Identification Free--Blow Component Identification -- Low Profile -- Upper Unit Component Listing--Ceiling Unit For Ducted Systems Supply AIR Return AIRFree Blow Type START--UP CationsRefrigerant CYCLE--STANDARD System Refrigerant Flow Schematic -- Heat Pump -- Cool Mode Cooling Refrigerant Cycle -- Heat PumpPage Section Troubleshooting Condenser AIR not Adequate Heater Cycles on Limit Switch HEAT/ Cool Version onlyInsufficient COOLING, Cooling AIR not Adequate Insufficient CoolingClearing Diagnostic Alarms Inadequate Heat HEAT--PUMPPriority Malfunction Preventative Maintenance Section Service and MaintenanceService -- General Ceiling Grill -- Free Blow 3.3.3 Ceiling Panel Removal Indoor Thermostat Removal Indoor Thermostat 3.3.7 Air Sweep RemovalCeiling Unit -- Ducted Systems Control Box Assembly RemovalFilter Removal PCB Display Removal Service -- Upper Unit -- STANDARD, HC & HPFuse Removal Compressor Replacement 15 Control BoxUpper Scroll Assembly Removal 19 Motor AssemblyAir Handling System Removal 23 Blower WheelLine Voltage -- 10% 27 Upper Scroll Assembly Locking Tabs b. & Screw Locations c 30 Condenser Fan Assembly Retaining Ring Condenser Motor Removal 34 Evaporator Motor Locking TabsBe permanent. It cannot be changed back to Capacitor RemovalChange from Fahrenheit to Celsius will Fahrenheit38 Remote Control Components SET Thermostat Configuration LCD DisplayCheck Thermostat Operation Upper Unit Powerbox AssemblyThermostat Thermostat Powerbox Assembly Ac to ry Wiri ng Fie ld Wiri ngSection Wiring Schematics Upper Unit Schematic -- Standard & HCCeiling Unit Schematic -- Cooling Only Heat Pump -- Ceiling Unit -- Free Blow Heat Pump -- Upper Unit -- Ducted 10 Ceiling Unit -- Wall Thermostat -- Ducted & Free Blow Wall Mounted ThermostatsIndex Ceiling Unit -- Ducted Systems Ceiling Unit -- Free Blow