Carrier 38AH044-084 specifications Problem Solution Compressor does not RUN

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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

3. No control power.

 

size fuse.

3.

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

 

 

 

size. Replace transformer if primary windings receiving

4.

Thermostat circuit open.

 

power.

4.

Check thermostat setting.

5.

Multi-function timer not operating.

5.

Check timer for proper operation; replace if defective.

6.

Compressor circuit breaker tripped.

6.

Check for excessive compressor current draw. Reset

7.

Safety device lockout circuit active.

 

breaker; replace if defective.

7.

Reset lockout 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

9. High-pressure switch open.

 

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

10. Discharge gas temperature switch open.

 

correctly.

10.

Check for open condition. Allow for reset. Replace if

11.

Loose electrical connections.

 

defective.

11.

Tighten all connections.

12. Compressor stuck.

12.

See 06E compressor service literature.

Contactor Closed

 

 

1.

Compressor leads loose.

1.

Check connections.

2.

Motor windings open.

2.

See 06E 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.

Air¯ow restricted.

2.

Remove obstruction.

3.

Air recirculating.

3.

Clear air¯ow area.

4.

Noncondensables in system.

4.

Purge and recharge as required.

5.

Refrigerant overcharge.

5.

Purge as required.

6.

Line voltage incorrect.

6.

Consult power company.

7.

Refrigerant system restrictions.

7.

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

 

 

 

that compressor discharge 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.

Filter drier plugged.

1.

Replace ®lter drier.

2.

Expansion valve power head defective.

2.

Replace power head.

3.

Low refrigerant charge.

3.

Add charge. Check low-pressure switch setting.

Air¯ow Restricted

 

 

1.

Coil iced up.

1.

Check refrigerant charge.

2.

Coil dirty.

2.

Clean coil ®ns.

3.

Air ®lters dirty.

3.

Clean or replace ®lters.

4.

Dampers closed.

4.

Check damper operation and position.

Indoor-Air Fan Stopped

 

 

1.

Electrical connections loose.

1.

Tighten all connections.

2.

Fan relay defective.

2.

Replace relay.

3.

Motor overload open.

3.

Power supply.

4.

Motor defective.

4.

Replace motor.

5.

Fan belt broken or slipping.

5.

Replace or tighten belt.

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Contents Installation, Start-Up Service Instructions Module Rigging Center of Gravity Ð in. mmUnit Check Compressor Mounting Unit Total Operational Corner WeightWeight Dimensions Ð Units 38AH044,054,064 Dimensions Ð Units 38AH074,084 Chart 1, Field Power Supply Connections Dimensions Ð Unit 38AH094Dimensions Ð Unit 38AH104 Dimensions Ð Unit 38AH124 Dimensions Ð Unit 38AH134 Ð Units 38AH044-084 Physical Data Ð 50/60 Hz SI Ð Units 38AH044-084 Physical Data Ð 50/60 Hz EnglishÐ Units 38AH094-134 Physical Data Ð 50/60 Hz SI Ð Units 38AH094-134 Physical Data Ð 50/60 Hz EnglishControl BOX Sheet Metal Cover Panel Removed Ð Typical Module with Cover Panels Removed Unit Maximum Liquid Lift Make Refrigerant Piping ConnectionsLiquid Lift Dual Circuit Single Circuit 38AH 044 STR Ð StreetPipe D Diameter Unit Total Linear Length of Interconnecting Pipe Ð FT M Unit 15¤8 21¤8 124B,134A 074 Total Linear Length of Interconnecting Pipe Ð FT Unit38AH 6.1 124B, 134A 07415-20 20-50 50-75 TXV Ð Thermostatic Expansion Valve TYP Ð Typical Units 38AH124 and 134 with Installed Piping Kit Fully Assembled Piping and Trim Kit Unit 38AH134 Shown Kit RailsÐ Electrical Data Ð 50/60 Hz 38AH044-084 Dual-Circuit Units Make Electrical ConnectionsRLA Optional SINGLE-CIRCUIT Unit CompressorFLA Unit Voltage Nameplate Supply COMPRESSOR² MCA Electrical Data Ð 50/60 Hz Units 38AH094,104Designation CKT ModelControl Circuit Electrical Data Ð 50/60 Hz Electrical Data Ð 50/60 Hz Units 38AH124Unit Condenser FAN Fan Motor Electrical Data38AH Nameplate Qty Total No.* FLA Each No.* LRA Each Unit 38AH ModuleLength Ð Insulated Wire Ð AWG Length Ð Insulated Wire Ð AWG Field Wiring, One 2-Stage Thermostat Ð Units 38AH094 Field Wiring, One 2-Stage Thermostat Ð Units 38AH124 GND Terminal Block for Field Wiring, Single ModuPanel Control, Unit 38AH094 Field Wiring, Single ModuPanel Control, Unit 38AH104 Field Wiring, Single ModuPanel Control, Units 38AH124 Main Power Connection and Control Circuit Wiring Install AccessoriesMain Power Connection Control Circuit Control Power06E Compressors, Typical Preliminary ChecksAdjust Refrigerant Charge 044-084 094 104 124 134 38AH Index of Lead/Lag Circuits and CompressorsSTD OPT Lead Circuit Compressor, Lead Compressor LagCharging Chart Ð Unit 38AH044 50/60 Hz Ð Dual Circuit Charging Chart Ð Unit 38AH064 50/60 Hz Ð Dual Circuit Page Page Charging Chart Ð Unit 38AH104 50/60 Hz Charging Chart Ð Unit 38AH094 50/60 HzFan Cycling Control Ð Psig kPag Control by Pressure ± 10 Switch Opens 160 Switch Closes 255Refrigerant Circuit Switch Cutout CUT-IN Pressure Switch Settings Psig kPagCapacity Control CUT-IN Ð Cutout Ð38AH Circuit Total Quantity of Loaded System Unit Compressor CylindersUnit Quantity System Capacity Loaded CylindersControl Timer Cycle Unit Control Box 06E-250 06E-265 06E-275 06E-299 Compressor Replacement Ð Perform the followingCompressor OIL Required Compressor Cycles on LOW-PRESSURE Switch Problem Solution Compressor does not RUNCompressor Stops on HIGH-PRESSURE Switch Troubleshooting Pre-Start-Up Preliminary InformationComp A1 Comp A2 Comp B1 Comp B2 Start-Up

38AH044-084 specifications

The Carrier 38AH044-084 is an innovative air conditioning unit designed to provide efficient cooling solutions for residential and light commercial applications. This model is a part of Carrier's Aqua Series and is well-regarded for its combination of performance, energy efficiency, and innovative features.

One of the standout characteristics of the Carrier 38AH044-084 is its high-efficiency rating, which often exceeds the minimum efficiency standards set by the Department of Energy. Its Seasonal Energy Efficiency Ratio (SEER) rating is commendable, indicating significant energy savings over traditional air conditioning units. This efficiency translates to lower utility bills and a reduced carbon footprint, making it an environmentally friendly option.

In terms of technology, the Carrier 38AH044-084 is equipped with a modern scroll compressor. This type of compressor is known for its durability and quiet operation, contributing to a more pleasant indoor environment. The unit also incorporates advanced refrigerant technology, often using R-410A refrigerant, which is recognized for its lower environmental impact compared to older refrigerants like R-22.

The design of the 38AH044-084 focuses on ease of installation and maintenance. The compact footprint makes it suitable for various installation scenarios, whether on rooftops or ground levels. Additionally, the unit is engineered for durability, featuring weather-resistant components that can withstand harsh environmental conditions.

Another notable feature is the advanced airflow system, which ensures even distribution of cooled air throughout the space. This technology minimizes hot spots and enhances overall comfort. Furthermore, the unit supports a range of thermostatic controls, allowing users to customize their cooling experience according to their specific needs.

The Carrier 38AH044-084 is also designed with noise reduction in mind. Its sound-dampening technology helps minimize operational noise, making it a suitable choice for residential areas where noise levels are a concern.

In summary, the Carrier 38AH044-084 offers an excellent combination of energy efficiency, advanced technology, and user-friendly features. Whether for a home or a light commercial space, this unit provides reliable cooling performance while maintaining a focus on environmental responsibility and occupant comfort. With its robust design and innovative capabilities, it's a solid choice for those seeking effective and efficient air conditioning solutions.
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