Samsung AC042JXADCH/AA

Questions and Answers

J
John LopezAug 8, 2025
What to do if there is no communication for 2 minutes between indoor units on my Samsung Air Conditioner?
- J
  Jamie BooneAug 8, 2025
  If your Samsung Air Conditioner displays a communication error for more than 2 minutes between indoor units, check the communication lines and ensure the system is properly set up and configured.
R
robinsonrobertAug 15, 2025
What to do if my Samsung AC042JXADCH/AA Air Conditioner displays an error for the outdoor, condenser, or discharge temperature sensor?
- J
  Julie MaddoxAug 15, 2025
  If your Samsung Air Conditioner shows an error related to the outdoor temperature sensor, condenser temperature sensor, or discharge temperature sensor, check the connections of these sensors. If they appear faulty, consider replacing them.
A
Alexis AdamsAug 23, 2025
What to do if my Samsung AC042JXADCH/AA shows an error for the EVA-IN or EVA-OUT sensor?
- M
  michaelhoweAug 23, 2025
  If your Samsung Air Conditioner displays an error related to the EVA-IN or EVA-OUT sensor in the indoor unit (open/short), check the connections of these sensors. Replace them if necessary.
R
riveracrystalAug 31, 2025
What to do if my Samsung AC042JXADCH/AA displays a room sensor error?
- P
  patrick00Aug 31, 2025
  If your Samsung Air Conditioner displays an error related to the room sensor in the indoor unit (open/short), check the room sensor connections and replace the sensor if necessary.

Summary

Precautions

1-1 Precautions for the Service

Guidelines for safe and effective service procedures.

1-2 Precautions related to static electricity and PL

Warnings about static electricity and Product Liability.

1-3 Precautions related to product safety

Essential safety measures to prevent hazards during operation.

1-4 Other precautions

Additional important precautions for installation and operation.

Product Specifications

2-1 The Feature of Product

Highlights the key features and benefits of the air conditioner.

2-2 Product Specifications

Detailed technical specifications including performance and dimensions.

2-3 Specifications of optional items

Lists and details optional accessories for the air conditioner.

2-3-2 Filter specifications

Details specifications for the unit's filter.

Disassembly and Reassembly

Necessary Tools

Lists essential tools required for disassembly and reassembly.

3-1 Indoor unit

Step-by-step guide for disassembling the indoor unit.

3-2 Outdoor Unit

Step-by-step guide for disassembling the outdoor unit.

Troubleshooting

4-1 Setting an indoor unit address and installation option

How to set unit address and installation options via remote.

4-1-3 Order for Setting Options (Wired Remote Controller)

Sequence for setting options using a wired remote controller.

4-1-4 Setting an indoor unit installation option (Suitable for the condition of each installation location)

Configuring unit options based on installation environment.

4-1-5 Changing a particular option

How to modify individual setting digits for options.

4-1-6 Option code for each model

Reference table for model-specific option codes.

4-2 Items to check before diagnostics

Preliminary checks before performing diagnostics.

4-2-1 Test run mode and View mode

Procedures for test run and viewing system status.

4-2-2 Eco Mode [Power Saving Mode]

Explanation and operation of the energy-saving Eco Mode.

4-2-3 Four directions cassette type

Troubleshooting specific to four-direction cassette models.

4-2-4 Wired remote controller

Troubleshooting common errors related to the wired remote controller.

4-3 Troubleshooting by symptoms

Diagnosing issues based on observed symptoms.

4-3-1 Indoor temperature sensor (open;short)

Diagnosing indoor temperature sensor faults.

4-3-2 Indoor heat exchanger temperature sensor (open;short)

Diagnosing heat exchanger sensor faults.

4-3-3 Indoor FAN error

Troubleshooting problems with the indoor unit fan.

4-3-4 Communication error after finishing Tracking

Resolving communication errors after initial setup.

4-3-5 Indoor unit float sensor error

Diagnosing issues related to the indoor unit's float sensor.

4-3-6 EEPROM circuit failure

Troubleshooting EEPROM circuit failures.

4-3-7 Thermal Fuse Open Error

Diagnosing and resolving thermal fuse open errors.

4-3-8 When the outdoor unit power is not ON - Initial Diagnosis: 3-phase products

Initial diagnosis for 3-phase products with no outdoor unit power.

4-3-8 When the outdoor unit power is not ON - Initial Diagnosis: Single-phase product

Initial diagnosis for single-phase products with no outdoor unit power.

4-3-9 Indoor;outdoor communication error (1 min.) (Error Code: E202)

Troubleshooting indoor/outdoor communication errors (1 min).

4-3-10 Communication error between outdoor unit INV ↔ MAIN MICOM (1 min.) (Error Code: E203)

Resolving communication errors between INV and MAIN MICOM.

4-3-11 External Sensor Error (Error Code: E221, E231, E251, E320)

Troubleshooting external sensor errors.

4-3-12 Outdoor Unit Fan Error (Error Code: E458, E475)

Diagnosing and resolving outdoor unit fan errors.

4-3-13 Error of Compressor Startup and Rotation (Error Code: E461, E467)

Troubleshooting compressor startup and rotation issues.

4-3-14 Error of under-current error; PFC over-current (Error Code: E462, E484)

Resolving under-current and PFC over-current errors.

4-3-15 IPM Over-current Error (Error Code: E464)

Troubleshooting IPM over-current errors.

4-3-16 DC LINK Over-current and Low-voltage Error (Error Code: E466)

Resolving DC link over-current and low-voltage errors.

4-3-17 Gas Leakage Error (Error Code: E554)

Diagnosing and resolving gas leakage errors.

4-3-18 Pipe Blocking Error (Error Code: E422)

Troubleshooting pipe blocking errors.

4-3-19 Other

Addresses miscellaneous troubleshooting issues and error codes.

PCB Diagram and Parts List

5-1 Indoor Unit

PCB diagrams and parts list for the indoor unit.

5-1-1 MAIN PCB

Detailed diagram and parts for the indoor unit's main PCB.

5-1-2 Panel PCB

Diagram and parts for the indoor unit's panel PCB.

5-2 Outdoor Unit

PCB diagrams and parts list for the outdoor unit.

5-2-1 Main PCB

Diagram and parts for the outdoor unit's main PCB.

5-2-2 SUB PCB

Diagram and parts for the outdoor unit's sub PCB.

5-2-3 SMPS

Diagram and parts for the outdoor unit's SMPS.

5-2-4 MAIN PCB

Diagram and parts for the outdoor unit's main PCB (different models).

5-2-5 INVERTER PCB

Diagram and parts for the outdoor unit's inverter PCB.

5-2-6 EMI PCB

Diagram and parts for the outdoor unit's EMI PCB.

Wiring Diagram

6-1 Indoor Unit

Wiring diagram for the indoor unit.

6-2 Outdoor unit

Wiring diagram for the outdoor unit.

Reference Sheet

7-1 Index for Model Name

Index to understand model name codes.

7-1-1 Indoor Unit

Guide to decode Indoor Unit model names.

7-1-2 Outdoor Unit

Guide to decode Outdoor Unit model names.

7-1-3 Panel

Guide to decode Panel model names.

7-2 Refrigerating Cycle Diagram

Diagram illustrating the air conditioner's refrigeration cycle.