Carrier 38QUS042DS5 series User Manual

Light Commercial
SUPER INVERTER SERIES
MULTI TYPE
Service Manual 2017

Carrier 38QUS042DS5 series Specifications

General

Heating Seasonal Performance Factor (HSPF)	9.0
Refrigerant	R-410A
Indoor Unit Type	Ducted
Cooling Capacity	42000 BTU/h
Heating Capacity	42000 BTU/h
Voltage	208/230V

Summary

Indoor Unit General Information

Four-way Cassette (Compact)

Unit types, images, and model numbers for compact four-way cassette units.

Super Slim Cassette

Unit types, images, and model numbers for super slim cassette units.

Console Units

Unit types, images, and model numbers for console units.

Ducted Units (A5 & A6)

Unit types, images, and model numbers for A5 and A6 ducted units.

Outdoor Units (ODU)

Unit Features

2.1 Four-way cassette type(compact)

2.2 A5 Duct

2.3 Console

Wiring Diagrams

5. 38QUS014DS2*, 38QUS018DS2*

Wiring diagrams for specific outdoor unit models.

5. 38QUS027DS3*

Wiring diagram for 38QUS027DS3* outdoor unit.

5. 38QUS036DS4*

Wiring diagram for 38QUS036DS4* outdoor unit.

5. 38QUS042DS5*

Wiring diagram for 38QUS042DS5* outdoor unit.

5. Indoor Unit Wiring Diagrams

Indoor wiring diagrams for Hi-wall, cassette, console, and other models.

Electronic Functions and Protections

8.3 Main Protection

8.4 Operation Modes and Functions

8.4.2 Cooling mode

8.4.3 Dry mode

8.4.4 Heating mode

8.4.5 Auto-mode

8.4.7 Timer Function

8.4.8 Sleep mode

8.4.9 Auto-Restart function

8.4.10 Drain pump control

8.4.11 Follow me (optional)

8.4.12 Mode conflict

Refrigeration Cycle Diagrams

12.1 Refrigeration circuit drawing of inverter 1 drive 2 type

Diagrams of refrigeration circuits for 1-drive-2 and 1-drive-3 systems.

12.2 Refrigeration circuit drawing of inverter 1 drive 3 type

Diagrams of refrigeration circuits for 1-drive-2 and 1-drive-3 systems.

12.3 Refrigeration circuit drawing of inverter 1 drive 4 type

Diagrams of refrigeration circuits for 1-drive-4 and 1-drive-5 systems.

12.4 Refrigeration circuit drawing of inverter 1 drive 5 type

Diagrams of refrigeration circuits for 1-drive-4 and 1-drive-5 systems.

Outdoor Unit Wiring Diagrams

13. 38QUS014DS2*, 38QUS018DS2*

Wiring diagrams for specific outdoor unit models.

13. 38QUS027DS3*

Wiring diagram for 38QUS027DS3* outdoor unit.

13. 38QUS036DS4*

Wiring diagram for 38QUS036DS4* outdoor unit.

13. 38QUS042DS5*

Wiring diagram for 38QUS042DS5* outdoor unit.

Installation Details

16.1.1 Wrench torque sheet for installation

16.1.2 Connecting the cables

16.1.3 Pipe length and the elevation

16.1.4 Installation for the first time

16.1.5 Adding the refrigerant after running the system for many years

16.1.6 Re-installation while the indoor unit need to be repaired

16.1.7 Re-installation while the outdoor unit need to be repaired

Electronic Control Functions

17.4 Outdoor unit point check function

17.5 Protection

Covers compressor, voltage, current, temperature, communication, and ambient protections.

Troubleshooting

18.1 Indoor unit error code explanation:

Lists indoor unit error codes and troubleshooting flowcharts.

18.2 Outdoor unit error code explanation:

Lists outdoor unit error codes and their LED status for outdoor units.

18.3 Trouble shooting

Flowcharts for diagnosing indoor and outdoor unit issues like EEPROM, communication, and fan speed.

Appendices: Component Checks

1. Temperature sensor checking

Procedure and resistance value tables for checking temperature sensors.

2. Compressor checking

Procedures for checking compressor resistance.

3. IPM continuity check

Procedures for checking IPM continuity using a digital tester.