Samsung MXD-U000XN User Manual

AIR CONDITIONER CONTENTS
SYSTEM AIR CONDITIONER
SINGLE for North America(R-410A, Heat Pump)
1. Precautions
2. Product Specifications
3. Disassembly and Reassembly
4. Troubleshooting
5. PCB Diagram and Parts List
6. Wiring Diagram
7. Reference Sheet
Unitary Outdoor Unit AHU Control Unit
AC024BXUPCH
AC036BXUDCH
AC036BXUPCH
AC048BXUPCH
AC060BXUPCH
MXD-U000XN

Samsung MXD-U000XN Specifications

General

Brand	Samsung
Model	MXD-U000XN
Category	Air Conditioner
Language	English

Summary

1. Precautions

1-3. Precautions for the Safety

2. Product Specifications

3. Disassembly and Reassembly

4. Troubleshooting

4-1. Diagnostic Checklist

Procedures for diagnosing system issues using test operation and check modes.

4-2. Troubleshooting by Symptoms

Guidance on identifying and resolving specific error codes and operational problems.

4-2-1. Outdoor unit power not ON

Initial diagnosis and troubleshooting steps when the outdoor unit does not power on.

4-2-2. Communication error (E203)

Troubleshooting steps for communication errors between outdoor unit INV and MAIN MICOM.

4-2-3. Outdoor sensor error (E221, E231, E251, E320)

Troubleshooting steps for outdoor sensor errors like E221, E231, E251, and E320.

4-2-4. High Pressure sensor error (E291)

Troubleshooting steps for high pressure sensor errors, including open/short conditions.

4-2-5. Suction Temperature sensor error (E308)

Troubleshooting steps for suction temperature sensor errors, including open/short conditions.

4-2-6. Compressor down due to freezing control (E403)

Troubleshooting steps for compressor freezing control errors, specifically E403.

4-2-8. Comp. Down due to High Pressure Protection Control (E407)

Troubleshooting steps for compressor down due to high pressure protection control, E407.

4-2-9. Comp. down due to low pressure sensor protection (E410)

Troubleshooting steps for compressor down due to low pressure sensor protection, E410.

4-2-10. Comp. down due to discharge temperature protection control (E416)

Troubleshooting steps for compressor down due to discharge temperature protection control, E416.

4-2-11. Heating operation restricted at outdoor temp. over Theat_high (E440)

Troubleshooting for heating operation restrictions due to high outdoor temperatures, E440.

4-2-13. Outdoor unit FAN error (E458, E475)

Troubleshooting steps for outdoor unit fan errors, including E458 and E475.

4-2-14. Compressor error (E461, 467)

Troubleshooting steps for compressor errors, including E461 and E467.

Compressor error (E461, 467) (cont.)

Continuation of troubleshooting steps for compressor errors E461 and E467.

4-2-15. Current error (E462, 484)

Troubleshooting steps for current errors, including E462 and E484.

4-2-16. Over Load Protection Error (E463)

Troubleshooting steps for overload protection errors, specifically E463.

4-2-17. IPM (Over Current) error (E464)

Troubleshooting steps for IPM (Over Current) errors, specifically E464.

IPM (Over Current) error - (E464) (cont.)

Continuation of troubleshooting steps for IPM (Over Current) error E464.

4-2-18. Compressor over load error- (E465)

Troubleshooting steps for compressor overload errors, specifically E465.

4-2-19. DC Link voltage under/over error - (E466)

4-2-20. Current sensor error – (E468)

4-2-23. IPM(IGBT Module) heat sink error – (E474)

4-2-25. Error due to high pressure switch open or compressor down by high pressure - (E507)

4-4-26. Gas leakage error – (E554)

4-2-27. Blockage detected on high pressure pipe during heating operation – (E534)

4-2-7. System stop due to overload protection control (E404)

Troubleshooting steps for system stop due to overload protection control, specifically E404.

4-2-12. Cooling operation restricted at outdoor temp. over Tcool_low (E441)

Troubleshooting for cooling operation restrictions due to low outdoor temperatures, E441.

4-2-21. DC Link voltage sensor error (Short/Open) – (E469)

4-2-24. Input current sensor error (Short/Open) - (E485)

4-2-22. Outdoor unit EEPROM Read/Write error (E470/E471)

6. Wiring Diagram