Samsung AM120FXV Series Service Manual

System air conditioner, outdoor unit

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AIR CONDITIONER

Refer to the service manual in the GSPN(see the rear cover) for the more information.

SYSTEM AIR CONDITIONER

OUTDOOR UNIT

AM080/100/120/140/180/200/220FXVSSS

CONTENTS

1. Precautions

2. Product Specifications

3. Disassembly and Reassembly

4. Troubleshooting

5. PCB Diagram and Parts List

6. Wiring Diagram

7. Reference Sheet

Table of Contents

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Summarization of Contents

1. Precautions

1-1 Precautions for the Service

Essential service guidelines for electrical parts, connections, and general handling.

1-2 Precautions for the Static Electricity and PL

Safety measures for handling PCBs and avoiding static electricity.

1-3 Precautions for the Safety

General safety precautions regarding power, wiring, and electrical parts.

1-4 Precautions for Handling Refrigerant for Air Conditioner

Safety and environmental guidelines for handling refrigerants.

1-5 Precautions for Welding the Air Conditioner Pipe

Safety measures for welding air conditioner pipes, including gas handling.

1-6 Precautions for Additional Supplement of Air Conditioner Refrigerant

Guidelines for safely supplementing refrigerant and avoiding overcharging.

1-7 Other Precautions

Miscellaneous precautions for pipe leakage and compressor operation.

2. Product Specifications

2-1 The Feature of Product

Details on Dual SSC System Technology and Dual Smart Inverter System.

2-1-1 Feature

Explanation of Dual SSC System Technology and Dual Smart Inverter System features.

2-1-2 Changes in comparison to basic mode

Compares changes in Cabinet and Control Box/PCB from basic to updated models.

2-1-3 Structure of product

Illustrates the internal structure of small and large size outdoor units.

2-2 Product Specifications

Detailed technical specifications for outdoor units, including capacity, power, and dimensions.

2-2-1 Outdoor Unit

Technical specifications for various outdoor unit models and types.

2-3 Accessory and Option Specifications

Lists accessories and optional parts for the air conditioning system.

2-3-1 Accessories

Details accessories like Y-Joints, Distribution Headers, MCU, and EEV Kits.

3. Disassembly and Reassembly

3-1 Necessary Tools

Lists essential tools required for disassembly and reassembly procedures.

3-2 Disassembly and Reassembly

Step-by-step guide for disassembling electrical equipment parts.

3-2-1 AM080/100/120FXV

Detailed procedure for disassembling electrical equipment for specific models.

Binding Wire 1

Details valve and sensor connections and insulation for specific models.

Binding Wire 2

Details valve and sensor connections and insulation for specific models.

Binding Wire 3

Describes wire fixing and C/Box structure separation for specific models.

[Reference Sheet] Pipe Welding Position

Illustrates pipe welding positions for specific models with front and rear parts.

3-2-2 AM140FXV

Procedure for disassembling electrical equipment for AM140FXV models.

Binding Wire 1

Details valve, sensor, and insulation connections for AM140FXV.

Binding Wire 2

Details valve, sensor, and insulation connections for AM140FXV.

Binding Wire 3

Describes wire fixing and C/Box structure separation for AM140FXV.

3-2-3 AM160/180/200/220FXV

Disassembly procedure for electrical equipment of AM160-220FXV models.

Heat Sink

Instructions for spreading thermal grease on the heat sink and reassembly.

Binding Wire 1

Details valve, sensor, and insulation connections for AM160/180/200/220FXV.

Binding Wire 2

Details valve, sensor, and insulation connections for AM160/180/200/220FXV.

Binding Wire 3

Describes wire fixing and C/Box structure separation for AM160/180/200/220FXV.

3-3 Caution at compressor exchange

Detailed caution points and order for compressor exchange.

3-4 MCU

Step-by-step instructions for disassembling the MCU.

3-5 EEV KIT

Step-by-step instructions for disassembling the EEV KIT.

4. Troubleshooting

4-1 Check-up Window Description

Explains the functions of the check-up window display and related components.

4-2 Service Operation

Details service operations, including special operations and key input.

4-2-1 Special Operation

Explains key inputs for service operations and their corresponding displays.

Commissioning

Outlines steps for stable operation after initial installation.

Refrigerant filling operation

Describes the operation for filling refrigerant into the compressor.

Heating Pump Out

Procedure for expelling refrigerant from the outdoor unit to the indoor part.

Cooling Pump Down

Procedure for recovering refrigerant from the indoor unit and piping to the outdoor side.

Vacuum Operation

Operation to facilitate vacuum by opening the valve after outdoor unit repair.

4-2-2 DVM S Models EEPROM Code Table

Lists EEPROM codes for DVM S models for troubleshooting.

4-2-3 Number Display Method (Outdoor Unit, MCU, Cable remote control, wall-mount, etc.)

Explains how integrated error codes are displayed and their meanings.

Error code related indoor unit

Lists error codes and their descriptions for indoor units.

Error code related to the Communications / Settings / HW(cont.)

Details error codes related to communication, settings, and hardware.

4-3-8 Outdoor Temperature Sensor Error

Troubleshooting steps for outdoor temperature sensor errors (Open/Short).

4-3-9 Cond Out Temperature Sensor Error (Open/Short)

Troubleshooting steps for Cond Out temperature sensor errors.

4-3-10 Outdoor Cond Out sensor breakaway error

Troubleshooting steps for outdoor Cond Out sensor breakaway errors.

4-3-11 Compressor Discharge or Top 1/2 Temperature sensor error

Troubleshooting for compressor discharge or top temperature sensor errors.

4-3-12 : Suction Temperature sensor breakaway error

Troubleshooting for suction temperature sensor breakaway errors.

4-3-13 High Pressure sensor error (Open/Short)

Troubleshooting steps for high pressure sensor errors (Open/Short).

4-3-14 Low Pressure sensor error (Open/Short)

Troubleshooting steps for low pressure sensor errors (Open/Short).

4-3-15 Suction Temperature sensor error (Open/Short)

Troubleshooting steps for suction temperature sensor errors (Open/Short).

4-3-16 Liquid Pipe Temperature sensor error (Open/Short)

Troubleshooting steps for liquid pipe temperature sensor errors (Open/Short).

4-3-17 EVI In Temperature sensor error (Open/Short)

Troubleshooting steps for EVI In temperature sensor errors (Open/Short).

4-3-18 EVI Out Temperature sensor error (Open/Short)

Troubleshooting steps for EVI Out temperature sensor errors (Open/Short).

4-3-19 : Comp. Down due to High Pressure Protection Control

Troubleshooting for compressor down due to high pressure protection control.

4-3-20 : Comp. Down due to Low Pressure Protection Control

Troubleshooting for compressor down due to low pressure protection control.

4-3-21 : Comp. Down due to Compressor Discharge Temperature sensor

Troubleshooting for compressor down due to discharge temperature sensor errors.

4-3-22 3-phase Input Wiring error

Troubleshooting steps for 3-phase input wiring errors.

4-3-23 : Comp. Down by Compression Ratio Control

Troubleshooting for compressor down by compression ratio control.

4-3-24 EVI EEV Open error

Troubleshooting steps for EVI EEV open errors.

4-3-25 High Pressure Standard Not Met before Air Conditioning (Inability to Re-operate)

Troubleshooting for high pressure standard not met before AC operation.

4-3-26 Momentary Blackout error

Troubleshooting for momentary compressor stop due to blackout.

4-3-27 Overvoltage / Low voltage error

Troubleshooting for overvoltage or low voltage errors on the inverter PCB.

4-3-28 Outdoor Fan PCB Overvoltage / Low voltage error

Troubleshooting for overvoltage/low voltage errors on the outdoor fan PCB.

4-3-29 DC Link voltage sensor error

Troubleshooting for DC link voltage sensor errors on inverter or fan PCBs.

4-3-30 Input / Output Current sensor error

Troubleshooting for input/output current sensor errors on PCBs.

4-3-31 Inverter Overheat error

Troubleshooting steps for inverter overheat errors, checking IGBT module and heat sink.

4-3-32 Fan IPM Overheat error

Troubleshooting steps for fan IPM overheat errors, checking heat sink and assembly.

4-3-33 Inverter Overcurrent error

Troubleshooting steps for inverter overcurrent errors, checking installation and components.

4-3-34 Fan Motor Overcurrent error

Troubleshooting for fan motor overcurrent errors, checking connections and resistance.

4-3-35 Compressor starting error

Troubleshooting for compressor starting errors, checking bypass valve and resistance.

4-3-36 Fan starting error

Troubleshooting for fan starting errors, checking resistance and connections.

4-3-37 Fan lock error

Troubleshooting steps for fan lock errors, checking rotation and connections.

4-3-38 Outdoor Fan Motor overheating

Troubleshooting steps for outdoor fan motor overheating, checking connections and appearance.

4-3-39 Hall IC(Fan) error

Troubleshooting steps for Hall IC errors in the fan motor.

4-3-40 Model mismatching of Indoor unit.

Troubleshooting steps for model mismatching between indoor and outdoor units.

4-3-41 Breakdown of an EEV closure

Diagnostic steps for EEV closure breakdown, checking connections and resistance.

Main EEV Auto Inspect

Procedure for performing an automatic inspection of the Main EEV.

Reversed Phase/No Phase Check (Outdoor Unit with 3 Phase power) – Display for Problem

Checks for reversed or missing phases in a 3-phase power supply.

Initial Tracking (Communication Check-up) - Display for Problem

Checks communication status between outdoor and indoor units during initial tracking.

4-3-42 Communication Error between MCU and Outdoor Unit

Troubleshooting communication errors between MCU and outdoor unit during tracking.

4-3-43 Communication Error between MCU and Outdoor Unit after Tracking is Completed

Troubleshooting communication errors after tracking is completed.

4-3-44 MCU branch part setup error – Repeated setup for the same address over 3 times

Addresses MCU branch part setup errors related to repeated same address.

4-3-45 Setup Error for MCU Branch part – Setup Error for MCU Quantity Used

Addresses MCU branch part setup errors related to quantity used.

4-3-46 MCU branch part setup error – Set as being used without connection to an Indoor unit

Addresses MCU branch part setup errors when used without indoor unit connection.

4-3-47 MCU branch part setup error – Connect more Indoor units than what is actually set up in MCU

Addresses MCU branch part setup errors for connecting more units than configured.

4-3-48 Main Cooling Sol Valve Open Error

Troubleshooting steps for main cooling solenoid valve open errors.

5. PCB Diagram and Parts List

5-1 ASS'Y PCB MAIN

Provides a diagram and part list for the main PCB assembly.

5-2 ASS'Y PCB MAIN-HUB

Diagram and part list for the main PCB HUB assembly (AC).

5-3 ASS'Y PCB INVERTER

Diagram and part list for the inverter PCB assembly.

5-4 ASS'Y PCB FAN

Diagram and part list for the fan PCB assembly.

5-5 ASS'Y PCB EMI

Diagram and part list for the EMI PCB assembly.

5-6 SUB-COMM

Diagram and part list for the SUB-COMM assembly.

5-7 ASS'Y PCB MAIN-OUT : DB93-11697B

Part list for ASS'Y PCB MAIN-OUT DB93-11697B.

5-9 ASS'Y PCB INVERTER : DB93-13461A(AM080/100/120/140/180/200/220FXVSSS)

Part list for ASS'Y PCB INVERTER DB93-13461A.

5-10 ASS'Y PCB INVERTER : DB-113461B(AM160FXVSSS)

Part list for ASS'Y PCB INVERTER DB-113461B.

5-11 ASSY PCB EMI : DB93-13529A

Part list for ASSY PCB EMI DB93-13529A.

5-13 ASSY PCB FAN : DB93-11695C (AM140/160/180/200/220FXVSSS - 2FAN)

Part list for ASSY PCB FAN DB93-11695C (2FAN models).

5-14 ASSY PCB FAN : DB93-11695D (AM080/100/120FXVSSS - 1FAN)

Part list for ASSY PCB FAN DB93-11695D (1FAN models).

6. Wiring Diagram

6-1 AM080/100/120/140/160/180/200/220FXVSSS

Wiring diagrams for various outdoor unit models.

7. Cycle Diagram

7-1 AM080/100/120FXVAGH/EU