Samsung AM048KN4DCH/AA

Kara Rogers MDJul 26, 2025

Why does my Samsung Air Conditioner show a communication error between indoor and outdoor units?

J
john09Jul 26, 2025
This error occurs due to several reasons: 1. There is no communication between the indoor and outdoor units for 2 minutes. 2. A communication error was received from the outdoor unit. 3. There is a 3-minute tracking error on the outdoor unit. 4. A communication error occurred after tracking due to an unmatching number of installed units. 5. An error is due to a repeated communication address. 6. The communication address is not confirmed, or another outdoor unit communication error not listed above occurred. The error codes associated with these issues are E101, E102, E202, E201, E108 and E109.

Courtney CampbellAug 2, 2025

What does it mean when my Samsung Air Conditioner shows an error related to the outdoor temperature sensor?

C
Christine CamachoAug 2, 2025
An error related to the outdoor temperature sensor on your Samsung Air Conditioner could indicate: 1. Error on outdoor temperature sensor (Short or Open). 2. Error on cond sensor. 3. Error on discharge sensor. The error codes associated with these issues are E221, E237 and E251.

smithjohnAug 9, 2025

What does E121 error mean on a Samsung AM048KN4DCH/AA?

E
Erik SolomonAug 9, 2025
Error E121 on a Samsung Air Conditioner indicates an error on the indoor temperature sensor (Short or Open).

antonio98Aug 17, 2025

How to fix E108 error on Samsung AM048KN4DCH/AA?

P
Peter CarpenterAug 17, 2025
To fix the E108 error on your Samsung Air Conditioner, change the address and reset the system.

Brand	Samsung
Model	AM048KN4DCH/AA
Category	Air Conditioner
Language	English

Brand

Samsung

Model

AM048KN4DCH/AA

Samsung AM048KN4DCH/AA - User Manual

Table of Contents

Questions and Answers

Summary

1. Precautions

1-1 Precautions for the Service

1-3 Precautions for the Safety

1-4 Precautions for Handling Refrigerant for Air Conditioner

3. Disassembly and Reassembly

Necessary Tools

3-1 Indoor Unit

4. Troubleshooting

4-1 Check-up Window Description

4-2 Service Operation

4-2-1 Special Operation

4-3 Troubleshooting

4-3-1 Setting Option Setup Method

4-3-3 What to check before diagnosis

4-3-4 Number Display Method (Outdoor Unit, MCU, Cable remote control, wall-mount, etc.)

Diagnosis and Adjustment (Error Code)

4-4 Appropriate Measures for Different Symptom

4-4-1 Outdoor Unit Operation Flow

4-4-2 Main PCB has no power phenomenon

4-4-3 Indoor Unit ROOM sensor Error (Open;Short)

4-4-4 Indoor unit EVAP IN sensor Error (Open;Short)

4-4-5 Indoor EVAP OUT sensor Error (Open;Short)

4-4-6 Indoor Heat Exchangers EVAP IN sensor dislocation error

4-4-7 Indoor Heat Exchangers EVA OUT sensor dislocation error (Open;Short)

4-4-8 Simultaneous Indoor Heat Exchangers EVA IN, OUT sensor dislocation error (Open;Short)

4-4-9 Electronic Expansion Valve opening malfunction (2 nd stage) - E 135

4-4-10 Breakdown of EEV (2 nd)

4-4-11 Problem with EEV closure (2 nd)

4-4-12: Detection of Floating Switch of Indoor Units Drain Pump

4-4-13 The operational error of Indoor Units Fan Motor

4-4-15 EEPROM error

4-4-16 Option error of the Remote Controller for an Indoor Unit

4-4-18 Simultaneous opening of Cooling;heating MCU SOL Valves 1 st;2 nd

4-4-19 Error due to incorrect Indoor Unit Power;Communication Cable Connection

4-4-20 SPI Feedback Error

4-4-21 Outdoor Unit Pipe Inspection Error

4-4-22 Communication Error between Indoor and Outdoor Units during Tracking

4-4-23 Communication Error between Indoor and Outdoor Units after Tracking

4-4-24 Communication error between main and sub Unit of outdoor unit or between outdoor units

4-4-25 Communication Error between MCU and Outdoor Unit

4-4-26 Internal Communication error of the Outdoor Unit C-Box

4-4-27 Internal PCB Communication error of the Outdoor Unit C-Box

4-4-28 Communication Error between MCU and Outdoor Unit after Tracking is Completed

4-4-29 MCU branch part setup error - inconsecutive connection with the use of 2 branch parts

4-4-30 MCU branch part setup error - Repeated setup for the same address over 3 times

4-4-31 MCU branch part setup error - non-installed address setup

4-4-32 Setup Error for MCU Branch part - Setup Error for MCU Quantity Used

4-4-33 MCU branch part setup error - Overlapping Indoor unit Address setup

4-4-34 MCU branch part setup error - Set as being used without connection to an Indoor unit

4-4-35 MCU branch part setup error - Connect an Indoor unit to a branch part not being used

4-4-36 MCU branch part setup error - Connect more Indoor units than what is actually set up in MCU

4-4-37 Outdoor Temperature Sensor Error

4-4-38 Outdoor Temperature dislocation error

4-4-39 Cond Out Temperature Sensor Error (Open;Short)

4-4-40 Outdoor Cond Out sensor breakaway error

4-4-41 Digital Compressor Discharge Temperature Sensor Error (OPEN;SHORT)

4-4-42 Constant Rate Compressor Discharge Temperature Sensor Error (OPEN;SHORT)

4-4-43 Compressor Discharge or Top 1;2 Temperature sensor error

4-4-44: Dislocation error of Compressor SUMP Temperature (oil temperature) Sensor

4-4-45: Suction Temperature sensor breakaway error

4-4-46 SUMP Temperature Sensor Error (OPEN;SHORT)

4-4-47 High Pressure sensor error (Open;Short)

4-4-48 Low Pressure sensor error (Open;Short)

4-4-49 Suction Temperature sensor error (Open;Short)

4-4-50 Liquid Pipe Temperature sensor error (Open;Short)

4-4-51 EVI In Temperature sensor error (Open;Short)

4-4-52 EVI Out Temperature sensor error (Open;Short)

4-4-53 Suction-2 Temperature Sensor Error (OPEN;SHORT)

4-4-54: Comp. Down due to High Pressure Protection Control

4-4-55: Comp. Down due to Low Pressure Protection Control

4-4-56 Sump Sensor Error Due to Protection Control

4-4-57: Comp. Down due to Compressor Discharge Temperature sensor

4-4-58 3-phase Input Wiring error

4-4-59: Comp. Down by Compression Ratio Control

4-4-60 EVI EEV Open error

4-4-61 Refrigerant Leakage Error