Carrier 38AUZ Fastener Torque Values, Troubleshooting, Problem Solution Compressor does not RUN

Page 23

SEAT

CORE

5/8” HEX

.47

(Part No. EC39EZ067)

1/2-20 UNF RH

0.596

30°

WASHER

 

O-RING

1/2" HEX

45°

DEPRESSOR PER ARI 720 +.01/-.035

FROM FACE OF BODY

This surface provides a metal to metal seal when torqued into the seat. Appropriate handling is required to not scratch or dent the surface.

7/16-20 UNF RH

Fig. 22 — CoreMax Access Port Assembly

FASTENER TORQUE VALUES

Table 8 — Torque Values

Compressor mounting bolts

65–75 in–lbs

(734–847 N–cm)

Condenser fan motor mounting bolts

20

±2 in–lbs

(226

±23 N–cm)

Condenser fan hub setscrew

84

±2 in–lbs

(949

±136 N–cm)

High-flow service port

96

±10 in–lbs

(1085 ±23 N–cm)

Schrader-type service check valve

2–3 in–lbs

(23–34 N–cm)

TROUBLESHOOTING

 

 

PROBLEM

 

SOLUTION

COMPRESSOR DOES NOT RUN

 

 

Contactor Open

 

 

1.

Power off.

1.

Restore power.

2.

Fuses blown in field power circuit.

2.

After finding cause and correcting, replace with correct size fuse.

3.

No control power.

3.

Check control transformer primary connections and circuit breaker.

4.

Thermostat circuit open.

4.

Check thermostat setting.

5.

Safety device lockout circuit active.

5.

Reset lockout circuit.

6.

Low-pressure switch open.

6.

Check for refrigerant undercharge, obstruction of indoor airflow.

 

 

 

 

Make sure liquid line solenoid valve(s) is open.

7.

High-pressure switch open.

7.

Check for refrigerant overcharge, obstruction of outdoor airflow, air

 

 

 

 

in system. Be sure outdoor fans are operating correctly.

8.

Compressor overtemperature switch open.

8.

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

9.

Loose electrical connections.

9.

Tighten all connections.

10.

Compressor stuck.

10. 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.

Confirm rotation, correct if necessary.

3.

Airflow restricted.

3.

Remove obstruction.

4.

Air recirculating.

4.

Clear airflow area.

5.

Noncondensables in system.

5.

Recover refrigerant and recharge as required.

6.

Refrigerant overcharge.

6.

Recover refrigerant as required.

7.

Line voltage incorrect.

7.

Consult power company.

8.

Refrigerant system restrictions.

8.

Check or replace filter drier, expansion valve, etc.

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.

 

 

 

 

 

23

Page 22 Page 24
Image 23
Page 22 Page 24
Contents Safety Considerations ContentsReplacement /Retrofit R22 to Puron Installation Guideline38AUZ*07-14 Unit Dimensions Condenser Fans Unit Size 38AURefrigerant Type CompressorOperating Charge, Typical kg† Shipping Charge kg Operating Weight kg Aluminum-Fin Coils StandardPressurestat Settings kPa High Cutout Nominal Capacity kWRefrigerant Options Service OptionsModel Type Type of CoilInstallation Refrigerant Piping Sizes 38AUZ*07-14 60 Hz Units Liquid Line Data 38AUZ*07-14 60 Hz UnitsRefrigerant Specialities Part Numbers Install AccessoriesField Power Supply Complete Electrical ConnectionsAll units Units Without Factory-Installed DisconnectUnits with Factory-Installed Disconnect Convenience OutletsConnections Terminals Installing Weatherproof CoverUnit Connect Primary Transformer Thermostat Weatherproof Cover InstallationElectrical Data 38AUZ*07-14 Hz Units System Check PRE-START-UPSTART-UP Advanced Scroll Temperature Protection Label 38AUZ*07 Charging Chart 38AUZ*14 Charging Chart Base Unit Controls Routine System MaintenanceOperating Sequence Input ServiceComfort Alert Diagnostic Module Lockout LED Status CodesLubrication Cadm TroubleshootingCompressor Protection Factory High-Flow Access Ports Novation Coil Cleaning and MaintenanceRepairing Novation Condenser Tube Leaks Field Refrigerant Access PortsFastener Torque Values TroubleshootingProblem Solution Compressor does not RUN Compressor Stops on HIGH-PRESSURE SwitchSystem is Noisy Problem Solution Compressor Cycles on LOW-PRESSURE SwitchCompressor Running but Cooling Insufficient Unit Operates TOO Long or ContinuouslyAppendix Catalog No 38AU-01SI Preliminary Information CUT Along Dotted Linecut Along Dotted Line

38AUZ specifications

The Carrier 38AUZ series is a line of air conditioning systems specifically designed to deliver optimal comfort and energy efficiency for both residential and commercial applications. Known for their advanced technology and robust performance, these units are ideal for a variety of climate conditions, ensuring consistent cooling and heating throughout the year.

One of the standout features of the Carrier 38AUZ series is its inverter technology, which allows the unit to adjust its cooling or heating output in real-time based on the ambient conditions. This results in lower energy consumption and reduced operating costs, making the system not only environmentally friendly but also budget-conscious. By minimizing temperature fluctuations, the inverter design promotes a more stable and comfortable indoor environment.

The 38AUZ units are equipped with high-efficiency compressors that enhance the system’s performance. These compressors operate quietly and efficiently, contributing to a lower noise level that is ideal for residential settings. Furthermore, they come with variable speed fan motors which offer precise airflow control, allowing users to customize their comfort level while ensuring energy savings.

In terms of build quality, the Carrier 38AUZ is constructed using durable materials designed to withstand harsh weather conditions. Its compact design allows for easy installation and maintenance, making it an ideal choice for urban environments where space is limited. Additionally, the system features a corrosion-resistant cabinet that extends its lifespan and maintains aesthetic appeal.

The 38AUZ series also includes a range of advanced control options. Users can benefit from smart technology integration, allowing for remote temperature control and scheduling through mobile devices. This feature not only enhances convenience but also provides users with complete control over their energy usage.

Moreover, the Carrier 38AUZ units come with various capacity options, catering to different space requirements. With a focus on energy efficiency, these systems often meet or exceed industry standards, including SEER ratings, ensuring optimal performance without sacrificing energy consumption.

In summary, the Carrier 38AUZ series is an exemplary choice for anyone looking to invest in a reliable, efficient, and advanced air conditioning system. With its inverter technology, high-efficiency compressors, smart control options, and durable construction, the 38AUZ not only delivers exceptional comfort but also promotes energy conservation, making it a smart choice for sustainable living.
Top Page Image Contents