Carrier 48TF004-007 specifications Cooling Service Analysis

Page 45

Table 34 — Cooling Service Analysis

PROBLEM

CAUSE

REMEDY

Compressor and condenser fan

Power failure.

Call power company.

will not start.

Fuse blown or circuit breaker tripped.

Replace fuse or reset circuit breaker.

 

 

Defective thermostat, contactor, transformer, or

Replace component.

 

control relay.

 

 

Insufficient line voltage.

Determine cause and correct.

 

Incorrect or faulty wiring.

Check wiring diagram and rewire correctly.

 

Thermostat setting too high.

Lower thermostat setting below room temperature.

Compressor will not start but

Faulty wiring or loose connections in compressor

Check wiring and repair or replace.

condenser fan runs.

circuit.

 

 

Compressor motor burned out, seized, or internal

Determine cause. Replace compressor.

 

overload open.

 

 

Defective run/start capacitor, overload, start relay.

Determine cause and replace.

 

One leg of three-phase power dead.

Replace fuse or reset circuit breaker. Determine cause.

Compressor cycles (other than

Refrigerant overcharge or undercharge.

Recover refrigerant, evacuate system, and recharge to

normally satisfying thermostat).

 

nameplate.

 

Defective compressor.

Replace and determine cause.

 

Insufficient line voltage.

Determine cause and correct.

 

Blocked condenser.

Determine cause and correct.

 

Defective run/start capacitor, overload, or start

Determine cause and replace.

 

relay.

 

 

Defective thermostat.

Replace thermostat.

 

Faulty condenser-fan motor or capacitor.

Replace.

 

Restriction in refrigerant system.

Locate restriction and remove.

Compressor operates

Dirty air filter.

Replace filter.

continuously.

 

 

Unit undersized for load.

Decrease load or increase unit size.

 

 

Thermostat set too low.

Reset thermostat.

 

Low refrigerant charge.

Locate leak; repair and recharge.

 

Leaking valves in compressor.

Replace compressor.

 

Air in system.

Recover refrigerant, evacuate system, and recharge.

 

Condenser coil dirty or restricted.

Clean coil or remove restriction.

Excessive head pressure.

Dirty air filter.

Replace filter.

 

Dirty condenser coil.

Clean coil.

 

Refrigerant overcharged.

Recover excess refrigerant.

 

Air in system.

Recover refrigerant, evacuate system, and recharge.

 

Condenser air restricted or air short-cycling.

Determine cause and correct.

Head pressure too low.

Low refrigerant charge.

Check for leaks; repair and recharge.

 

Compressor valves leaking.

Replace compressor.

 

Restriction in liquid tube.

Remove restriction.

Excessive suction pressure.

High head load.

Check for source and eliminate.

 

Compressor valves leaking.

Replace compressor.

 

Refrigerant overcharged.

Recover excess refrigerant.

Suction pressure too low.

Dirty air filter.

Replace filter.

 

Low refrigerant charge.

Check for leaks; repair and recharge.

 

Metering device or low side restricted.

Remove source of restriction.

 

Insufficient evaporator airflow.

Increase air quantity. Check filter and replace if

 

 

necessary.

 

Temperature too low in conditioned area.

Reset thermostat.

 

Outdoor ambient below 25 F.

Install low-ambient kit.

Evaporator fan will not shut off.

Time off delay not finished.

Wait for 30-second off delay.

Compressor makes excessive

Compressor rotating in wrong direction.

Reverse the 3-phase power leads as described in the

noise (48TF007 scroll only).

 

Start-Up section on page 36.

45

Page 44 Page 46
Image 45
Page 44 Page 46
Contents Installation, Start-Up, Service Instructions Rig and Place Unit Inspect unit for Field Fabricate Ductwork Secure allRoof Curb Dimensions Install Gas Piping Unit is equipped for Install Flue Hood Flue hood is shippedUnit Size 48TF Physical Data 48TF004-007Furnace Section Base Unit Dimensions Steel Pipe Nominal Diameter Make Electrical ConnectionsFeet Or largerAHA Terminal BlockSupply Size Electrical DataType FLA RLA LRAPosition Setting Make Outdoor-Air Adjustments and Install Outdoor-Air HoodTypical Access Panel Locations Horizontal Discharge Block-Off Plate Wiring Connections for Outdoor-Air Thermostat Completed Hood Assembly EconoMi$er Wiring Wiring Diagram for Power Exhaust System Settings Default Potentiometer Settin gsPotentiometer Default Setting CO2 SP PPM Chan geover Set PointsDirect Drive Motor Mounting Adjust Evaporator-Fan Speed AdFan Rpm at Motor Pulley Settings Accessory/FIOP Static Pressure* in. wg 48TF004-007Motor Data 48TF004 3 Tons Alternate Motor Belt Drive 48TF004 3 Tons Standard Motor Direct Drive48TF005 4 Tons Standard Motor Direct Drive 48TF004 3 Tons HIGH-STATIC Motor Belt Drive48TF005 4 Tons Alternate Motor Belt Drive 48TF006 5 Tons Alternate Motor Belt Drive 48TF006 5 Tons Standard Motor Direct Drive48TF006 5 Tons HIGH-STATIC Motor Belt Drive 48TF007 6 Tons Standard Motor Belt Drive 48TF007 6 Tons HIGH-STATIC Motor Belt Drive 149 109189 2291064 10281005 93848TF005 4 Tons Alternate Motor Belt Drive 48TF005 4 Tons HIGH-STATIC Motor Belt Drive 1700 811 494 865 567 1600 770 420 826 4831800 852 578 1900 894 5671600 826 483 931 641 1020 788 1101 956 1178 12211252 1700 865 567 966 725 1051 883 1133 1061 1205928 700 982 779 885 623 942 700971 787 1022 867 1015 891 1063 9982000 1022 867 1121 1014 1188 1097 1254 1216 1900 982 779 1084 932 1160 1006 1223 11142100 1063 998 1140 1064 1196 1272 1292 2200 1104 1081 1159 1106 1229 1258Altitude Compensation HeatingBtuh Nominal Nominal InputPage Service Lubrication Economizer Adjustment Refer to Optional EconoTON Unit Charging Chart TON Unit 60 Hz Charging Chart Cooling Charging Chart, 48TF006LED Indication Error Code Description LED Error Code DescriptionOFF FlashesBurner Tray Details Heating Service Analysis LED Error Code Service AnalysisProblem Cause Remedy LED OFFCooling Service Analysis IFC Durablade Economizer TroubleshootingEconoMi$er Troubleshooting Typical Wiring Diagram and Component Arrangement CAP SATSEN SW1Copyright 2000 Carrier Corporation Page Preliminary Information Remove and Use in Job File

48TF004-007 specifications

The Carrier 48TF004-007 is part of the brand's renowned rooftop unit series, designed to deliver efficient, reliable performance for commercial applications. Ideal for spaces such as offices, retail stores, and small manufacturing facilities, these units encapsulate advanced technology to enhance indoor air quality and optimize climate control.

One of the standout features of the Carrier 48TF004-007 units is their variable speed compressor technology. This innovation not only allows for precise temperature control but also reduces energy consumption by modulating the compressor's speed according to the cooling or heating demand. By operating at lower speeds during less demanding conditions, these units significantly decrease energy usage compared to traditional single-speed compressors, contributing to lower utility bills and a reduced carbon footprint.

Energy efficiency is further enhanced with the inclusion of high-performance scroll compressors, which are known for their reliable operation and quiet performance. Coupled with an Energy Efficiency Ratio (EER) that meets or exceeds industry standards, these systems are designed to offer economical operation without sacrificing comfort.

Incorporating smart controls and connectivity features, the Carrier 48TF004-007 units allow for easy integration into building management systems (BMS). This enhances the ability to monitor and manage energy usage in real time, further promoting efficiency. The units are also compatible with various thermostat options, allowing for user-friendly operation and customization of settings.

Another significant characteristic of the Carrier 48TF004-007 is its durable construction. Built with galvanized steel and powder-coated finishes, these units are designed to withstand the rigors of outdoor installation, ensuring long-lasting performance even in harsh weather conditions. Additionally, the units come equipped with advanced filtration systems that help improve indoor air quality by effectively removing dust, allergens, and other particulate matter from the air.

Maintenance is simplified with the Carrier 48TF004-007, providing easy access to vital components, which supports reduced downtime and service costs. The units also feature low operating sound levels, making them suitable for noise-sensitive applications.

In conclusion, the Carrier 48TF004-007 rooftop units stand out for their energy efficiency, advanced technology, durability, and ease of maintenance, making them an excellent choice for any commercial space looking to enhance comfort while effectively managing operational costs.
Top Page Image Contents