Daikin 2MXM40M User Manual

Service
Manual
RA R32 Split &
multi split M-Series
ESIE16-02B
Indoor unit Outdoor unit
FTXJ-M FTXM-M FTXP-KV FDXM-F RXJ-M RXM-M MXM-M MXM-N

Daikin 2MXM40M Specifications

General

Type	Multi Split
Cooling Capacity (kW)	4.0
Cooling Capacity (Btu/h)	13600
Heating Capacity (kW)	5.0
Refrigerant	R-32
Maximum Number of Connectable Indoor Units	2
Seasonal Energy Efficiency Ratio (SEER)	6.1
Power Supply	220-240V, 50Hz

Summary

Part 1. Introduction

1.2. Safety precautions

Essential safety guidelines, including warnings, cautions, and symbol meanings.

Part 2. Troubleshooting

2.1. Error codes check

Methods for checking and understanding error codes displayed by the unit.

2.1.1. Error codes via remote controller

How to view and reset error codes using the remote control.

2.1.2. Error codes via outdoor unit PCB

Procedures for retrieving and resetting error codes via the outdoor unit's PCB.

2.2. Error based troubleshooting

Detailed guide for diagnosing and resolving issues based on specific error codes.

2.2.1. Indoor unit

Troubleshooting steps for indoor unit error codes.

2.2.2. Outdoor unit

Troubleshooting steps for outdoor unit error codes.

2.2.3. System

Troubleshooting procedures for system-wide errors.

2.3. Symptom based troubleshooting

Guidance for diagnosing issues that do not trigger specific error codes.

2.4. Component checklist

Procedures for checking the functionality of individual unit components.

2.4.1. Indoor unit

Component checks specific to the indoor unit.

2.4.2. Outdoor unit

Component checks specific to the outdoor unit.

2.4.2.1. 4-way valve

Procedure for checking the 4-way valve for proper operation.

2.4.2.2. Compressor

Detailed checks for the compressor's electrical and mechanical condition.

2.4.2.3. Electronic expansion valve

Steps for inspecting and testing the electronic expansion valve.

2.4.2.4. Fan motor

Procedures for checking the fan motor's electrical and mechanical integrity.

2.4.2.5. High pressure sensor

2.4.2.6. Main PCB

2.4.2.7. Pressure sensor

2.4.2.8. Refrigerant thermistors

Procedures for checking refrigerant thermistors and their resistance values.

Part 3. Repair

3.1. Refrigerant repair procedures

Guidelines and procedures for handling refrigerant during repairs.

3.1.1. Refrigerant piping handling

Safe practices for handling refrigerant piping and connections.

3.1.2. Recovery procedure

Steps for recovering refrigerant safely from the system.

3.1.2.1. Outdoor unit casing

3.1.3. Refrigerant pump down

Method for collecting refrigerant within the outdoor unit for relocation.

3.1.3.1. Small outdoor unit

3.1.3.2. Large outdoor unit

3.1.4. Piping repair procedures

Steps for repairing refrigerant piping, including flare making and brazing.

3.3. Unit specific repair procedures

Detailed repair procedures for specific unit components.

3.3.2. Outdoor unit

Repair procedures specific to outdoor units.

3.3.2.1. Basic removal

3.3.2.1.1 Single fan outdoor unit

3.3.2.2. Replacing switch box

3.3.2.3. Replacing 4-way valve body

Steps for replacing the 4-way valve body.

3.3.2.4. Replacing 4-way valve coil

3.3.2.5. Replacing compressor

Detailed steps for replacing the compressor unit.

3.3.2.6. Replacing DC fan motor assembly

3.3.2.7. Replacing expansion valve body

Procedure for replacing the electronic expansion valve body.

3.3.2.8. Replacing expansion valve motor

3.3.2.9. Replacing main PCB

Guide for replacing the main printed circuit board (PCB).

3.3.2.11. Replacing thermistors

3.3.2.12. Setting test mode for inverter checker

Part 5. Appendix

5.1. Field setting

5.1.2.2.1 Wiring error check

5.1.2.2.2 Dip switch settings

5.3. Wiring diagram

Electrical wiring diagrams for various unit models.

5.3.2. Outdoor unit

Wiring diagrams for outdoor units.

5.3.2.1. 2MXM50M

5.3.2.2. 3MXM68M

5.3.2.3. 4MXM-M

5.3.2.4. 5MXM-M

5.3.2.5. RXJ20-35M

5.3.2.6. RXJ50M

5.3.2.7. RXM20-35M

5.3.2.8. RXM42-50M

5.3.2.9. RXM60-71M

5.3.2.10. RXM71M

5.4. Piping diagram

Piping diagrams illustrating refrigerant flow for various models.

5.4.2. Outdoor unit

Piping diagrams for outdoor units.

5.4.2.1. 2MXM40M

5.4.2.2. 3MXM68M

5.4.2.3. 4MXM68M

5.4.2.4. 5MXM-M

5.4.2.5. RXJ20-35M

5.4.2.6. RXJ50M

5.4.2.7. RXM20-35M

5.4.2.8. RXM42-50M

5.4.2.9. RXM60

5.4.2.10. RXM71M

5.5. Component overview of unit

5.5.2. Outdoor unit

5.6.1. Error codes

Detailed explanations and conditions for specific error codes.

5.6.1.1. “E7-00” – Fan motor abnormality

5.6.1.2. “EA-00” – Malfunction of 4-way valve

5.6.1.3. “F3-00” – Discharge pipe temperature abnormality

5.6.1.4. “L3-00” – Switch box temperature abnormality

5.6.1.5. “L4-00” – Inverter radiating fin temperature abnormality