Samsung AC140MXAD*H User Manual

1. Precautions
2. Product Specifications
3. Disassembly and Reassembly
4. Troubleshooting
5. PCB Diagram
6. Wiring Diagram
7. Reference Sheet
CONTENTSSYSTEM AIR CONDITIONER
INDOOR UNIT OUTDOOR UNIT
SYSTEM AIR CONDITIONER
CIRCULAR CASSETTE SERIES
AC071MN4PKH
AC090MN4PKH
AC100MN4PKH
AC120MN4PKH
AC140MN4PKH
AC090MXADKH
AC100MXAD*H
AC120MXAD*H
AC140MXAD*H

Samsung AC140MXAD*H Specifications

General

Brand	Samsung
Model	AC140MXAD*H
Category	Air Conditioner
Language	English

Summary

1. Precautions

1-1. Precautions for the Service

1-2. Precautions related to static electricity and PL

1-3. Precautions related to product safety

Essential safety instructions for handling power cords, plugs, electrical outlets, and grounding.

3. Disassembly and Reassembly

3-2. Indoor Unit

3-3. Outdoor Unit

4. Troubleshooting

4-1. Setting an indoor unit address and installation option

4-3. Diagnostic Checklist ago

4-3-3. Error code [indoor]

Explanation of indoor unit error codes and their corresponding display indications.

4-3-4. Error code [outdoor]

Comprehensive list of outdoor unit error codes, remarks, and necessary checks.

4-3-5 Wired remote controller

Troubleshooting for wired remote controller errors, including error modes and measures.

4-4. Troubleshooting by symptoms

Detailed troubleshooting guides for various operational symptoms and error codes.

4-4-1. When the indoor unit power is not ON – Initial Diagnosis : 1-phase products

Step-by-step diagnosis for indoor units not powering on, specifically for 1-phase products.

4-4-2. Indoor temperature sensor error (E121)

Troubleshooting steps for E121 error related to the indoor temperature sensor.

4-4-3. Indoor heat exchanger temperature sensor error (E122)

Troubleshooting steps for E122 error related to the indoor heat exchanger temperature sensor.

4-4-4. Indoor Fan error (E154)

Diagnosis and resolution for E154 error indicating an issue with the indoor fan.

4-4-5. Communication error after finishing Tracking (E202)

Troubleshooting for E202 error, a communication issue between indoor and outdoor units.

4-4-6. Indoor unit float sensor error

Steps to resolve E202 error related to the indoor unit float sensor failure.

4-4-7. EEPROM circuit failure (E162)

Troubleshooting for E162 error indicating an EEPROM circuit failure.

4-4-9. When the outdoor unit power is not ON - Initial Diagnosis : 3-phase products

Diagnostic steps for outdoor units not powering on, specific to 3-phase products.

4-4-10. Indoor/outdoor communication error (1min.) (Error Code : E202)

Troubleshooting for E202 communication error between indoor and outdoor units.

4-4-11. Communication error between outdoor unit INV MAIN MICOM (1 min.)(Error Code: E203)

4-4-12. Outdoor sensor error(Error Code : E221, E231, E251, E320)

4-4-13. Reverse phase / Loss phase detection (3-phase outdoor unit) (Error Code : E425 )

Procedure to detect and resolve reverse or loss phase issues in 3-phase outdoor units (E425).

4-4-14. Compressor down due to freezing control (Error Code : E403)

4-4-15. Outdoor unit Fan error (Error Code : E458, E475)

4-4-16. Compressor starting error / rotation error (Error Code : E461, E467)

Troubleshooting for compressor starting and rotation errors (E461, E467).

4-4-17. Full current error / PFC over-current error (Error Code : E462, E484)

4-4-18. IPM IPM (Over Current) error (Error Code : E464)

4-4-19. DC LINK over-current / low-voltage error (Error Code : E466)

4-4-20. Gas leakage error(Error Code : E554)

Troubleshooting procedure for E554 error indicating a gas leakage.

4-4-21. Pipe blockage error(Error Code : E422)

4-4-22. Smart install mode was not carried out (Error Code : E508 )