Carrier 38AE012, 38AE016, 38AE014 specifications Troubleshooting, Problem Solution

Page 15

TROUBLESHOOTING

 

PROBLEM

 

SOLUTION

 

 

 

COMPRESSOR DOES NOT RUN

 

 

Contactor Open

 

 

1.

Power off.

1.

Restore power.

2.

Fuses blown in ®eld power circuit.

2. After ®nding cause and correcting, replace with correct size fuse.

3.

No control power.

3.

Check secondary fuse(s); replace with correct type and size.

 

 

 

Replace transformer if primary windings receiving power.

4.

Thermostat circuit open.

4.

Check thermostat setting.

5.

Time Guard II device not operating.

5.

Check Time Guard II devices.

6.

Compressor circuit breaker tripped.

6.

Check for excessive compressor current draw. Reset breaker;

 

 

 

replace if defective.

7.

Safety device lock-out circuit active.

7.

Reset lock-out circuit at thermostat or circuit breaker.

8.

Low-pressure switch open.

8.

Check for refrigerant undercharge, obstruction of indoor air¯ow, or

 

 

 

whether compressor suction shutoff valve is fully open. Make sure liquid

 

 

 

line solenoid valve(s) is open.

9.

High-pressure switch open.

9.

Check for refrigerant overcharge, obstruction of outdoor air¯ow, air in

 

 

 

system, or whether compressor discharge valve is fully open. Be sure

 

 

 

outdoor fans are operating correctly.

10.

Compressor overtemperature switch open.

10.

Check for open condition. Allow for reset. Replace if defective.

11.

Loose electrical connections.

11.

Tighten all connections.

12.

Compressor stuck.

12.

See compressor service literature.

Contactor Closed

 

 

1.

Compressor leads loose.

1.

Check connections.

2.

Motor windings open.

2.

See compressor service literature.

3.

Single phasing.

3.

Check for blown fuse. Check for loose connection at compressor terminal.

 

 

 

COMPRESSOR STOPS ON HIGH-PRESSURE SWITCH

 

 

Outdoor Fan On

 

 

1.

High-pressure switch faulty.

1.

Replace switch.

2.

Reversed fan rotation.

2.

Con®rm rotation, correct if necessary.

3.

Air¯ow restricted.

3.

Remove obstruction.

4.

Air recirculating.

4.

Clear air¯ow area.

5.

Noncondensables in system.

5.

Purge and recharge as required.

6.

Refrigerant overcharge.

6.

Purge as required.

7.

Line voltage incorrect.

7.

Consult power company.

8.

Refrigerant system restrictions.

8.

Check or replace ®lter drier, expansion valve, etc. Check that compressor

 

 

 

discharge service valve is fully open.

Outdoor Fan Off

 

 

1.

Fan slips on shaft.

1.

Tighten fan hub setscrews.

2.

Motor not running.

2.

Check power and capacitor.

3.

Motor bearings stuck.

3.

Replace bearings.

4.

Motor overload open.

4.

Check overload rating. Check for fan blade obstruction.

5.

Motor burned out.

5.

Replace motor.

 

 

 

COMPRESSOR CYCLES ON LOW-PRESSURE SWITCH

 

 

Indoor-Air Fan Running

 

 

1.

Compressor suction service valve partially

1.

Open valve fully.

 

closed.

 

 

2.

Liquid line solenoid valve(s) fails to open.

2.

Check liquid line solenoid valve(s) for proper operation. Replace if

 

 

 

necessary.

3.

Filter drier plugged.

3.

Replace ®lter drier.

4.

Expansion valve power head defective.

4.

Replace power head.

5.

Low refrigerant charge.

5.

Add charge. Check low-pressure switch setting.

 

 

 

 

15

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Contents Contents Safety ConsiderationsInstallation Dimensions ft-in Component Locations Typical Ð 38AE Shown Ð Physical Data SI, 60 Hz Ð Physical Data English, 60 HzÐ Physical Data SI, 50 Hz Ð Physical Data English, 50 HzComplete Refrigerant Piping Connections Rig and Mount the UnitNEC Complete Electrical ConnectionsÐ Electrical Data 3 Ph/50 Hz IFCLlsv Ð Charging Data R-22 PRE-START-UPBefore Starting Unit ensure the following START-UP38AE012 and 38AKS024 Charging Chart 38AE014 Charging Chart 38AE016 Charging Chart Operating Sequence ServiceOutdoor Fan LubricationProblem Solution TroubleshootingCompressor Running but Cooling Insufficient TroubleshootingPage Packaged Service Training START-UP Checklist Preliminary InformationPre-Start-Up Start-Up

38AE014, 38AE016, 38AE012 specifications

The Carrier 38AE012, 38AE016, and 38AE014 are part of the Carrier series of packaged rooftop air conditioning units, designed to deliver reliable and efficient cooling solutions for commercial and industrial applications. These units showcase advanced engineering and technology, addressing the diverse needs of modern HVAC systems.

One of the primary features of the Carrier 38AE series is their high-efficiency performance. They utilize advanced scroll compressor technology, which results in lower energy consumption while providing consistent cooling. With high SEER (Seasonal Energy Efficiency Ratio) ratings, these units help businesses reduce operational costs while maintaining comfortable indoor environments.

The construction of the Carrier 38AE units emphasizes durability and resilience. Built with high-quality materials, they are engineered to withstand harsh weather conditions and the rigors of daily use. The weatherized cabinets protect internal components from precipitation and corrosion, ensuring long-term reliability.

The 38AE series incorporates a sophisticated electronic control system that enhances performance monitoring and diagnostics. This feature allows facility managers to easily manage and optimize the unit's operations, improving efficiency and reducing potential downtime. Integrated with smart controls, these systems can be programmed for specific operating schedules, allowing for further energy savings.

Another standout technology in the Carrier 38AE series is the environmentally friendly refrigerant. By utilizing R-410A, these units contribute to reduced ozone depletion while still providing powerful cooling capabilities. This aligns with contemporary regulatory standards and climate initiatives to promote sustainable usage of HVAC systems.

The Carrier 38AE012, 38AE016, and 38AE014 models also excel in noise reduction technology, which is essential for commercial settings where ambient noise levels need to be minimized. The design includes low-noise fans and strategically placed insulation, resulting in quieter operation that enhances comfort for occupants.

In terms of installation, these units are versatile and can be easily mounted on building rooftops or on the ground. They feature a compact design, which facilitates seamless integration into existing structures without requiring extensive modifications.

Overall, the Carrier 38AE012, 38AE016, and 38AE014 models stand out for their combination of efficiency, durability, and advanced technology. They cater to a wide range of commercial needs, providing essential cooling while prioritizing sustainability and user comfort. With a commitment to innovation, Carrier continues to be a leader in the HVAC industry, ensuring that their products meet the evolving demands of energy efficiency and reliability.
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