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Daikin RX36NMVJU - Service Manual

Daikin RX36NMVJU
132 pages
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Service
Manual
Inverter Pair
Wall Mounted Type FTX-N Series
SiUS041638EA
[Applied Models]
Inverter Pair : Cooling Only
Inverter Pair : Heat Pump

Table of Contents

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Summary

Specifications

1.1 Cooling Only Specifications

Details the technical specifications for cooling-only models, including capacity, power, and dimensions.

1.2 Heat Pump Specifications

Details the technical specifications for heat pump models, including capacity, power, and dimensions.

Functions and Control

3.2 Frequency Control

Explains how compressor frequency is determined based on temperature and other controls.

3.6 Freeze-up Protection Control

Explains controls to prevent freezing and manage heating peak loads.

3.10 Defrost Control

Outlines conditions and timing for starting and canceling defrost cycles.

3.11 Electronic Expansion Valve Control

Lists control items for the electronic expansion valve including open and feedback controls.

3.12 Malfunctions

Identifies sensors prone to malfunction and detection of overcurrent/overload.

Service Diagnosis

1. General Problem Symptoms and Check Items

Lists common symptoms and initial checks for troubleshooting unit operation issues.

2. Troubleshooting with LED

Guides on troubleshooting using indoor and outdoor unit LED indicators.

2.1 Indoor Unit LED Troubleshooting

Details the meaning of the operation lamp blinking on the indoor unit.

3. Service Diagnosis Methods

Provides two methods for diagnosing errors using the remote controller.

Method 2 Diagnostic Steps

Details initial steps for diagnosing errors using Method 2, including button presses.

Method 2 Diagnostic Steps Continued

Continues diagnostic steps for Method 2, including sound diagnosis and error code determination.

4. Troubleshooting Guides

Introduces the section detailing troubleshooting for various error codes.

4.2 Indoor Unit PCB Abnormality (A1)

Explains error A1, its causes, and troubleshooting steps for indoor unit PCB issues.

Indoor Unit PCB Abnormality Troubleshooting Flowchart

Provides a visual guide for diagnosing indoor unit PCB problems step-by-step.

4.3 Freeze-up Protection; Heating Peak-cut Control (A5)

Details error A5 related to freeze-up protection and heating peak-cut control.

4.4 Indoor Fan Motor Abnormality (A6)

Explains error A6 concerning indoor fan motor issues and their potential causes.

Indoor Fan Motor Abnormality Troubleshooting Flowchart

Provides a visual guide for diagnosing indoor fan motor problems step-by-step.

4.5 Thermistor or Related Abnormality (Indoor Unit)

Covers errors C4 and C9 related to indoor unit thermistors and their troubleshooting.

4.6 Low-voltage or Over-voltage Detection (U2)

Explains error U2 related to power supply voltage abnormalities and their causes.

Low-voltage;Over-voltage Detection Troubleshooting Flowchart

Provides a visual guide for diagnosing power supply voltage issues step-by-step.

4.7 Signal Transmission Error (Indoor;Outdoor Unit) (U4)

Details error U4 concerning communication issues between indoor and outdoor units.

Signal Transmission Error (U4) Troubleshooting Flowchart

Provides a visual guide for diagnosing indoor/outdoor unit communication errors.

4.8 Signal Transmission Error on Outdoor Unit PCB (U7)

Explains error U7 related to communication on the outdoor unit PCB and its causes.

4.9 Mismatching of Indoor;Outdoor Unit (UA)

Covers error UA for incompatible unit combinations or wiring issues.

4.10 Outdoor Unit PCB Abnormality (E1)

Explains error E1 related to outdoor unit PCB malfunctions and troubleshooting.

4.11 OL Activation (Compressor Overload) (E5)

Details error E5 indicating compressor overload or OL activation and its causes.

OL Activation (E5) Troubleshooting Flowchart

Provides a visual guide for diagnosing compressor overload issues step-by-step.

Trial Operation and Field Settings

Summary

Specifications

1.1 Cooling Only Specifications

Details the technical specifications for cooling-only models, including capacity, power, and dimensions.

1.2 Heat Pump Specifications

Details the technical specifications for heat pump models, including capacity, power, and dimensions.

Functions and Control

3.2 Frequency Control

Explains how compressor frequency is determined based on temperature and other controls.

3.6 Freeze-up Protection Control

Explains controls to prevent freezing and manage heating peak loads.

3.10 Defrost Control

Outlines conditions and timing for starting and canceling defrost cycles.

3.11 Electronic Expansion Valve Control

Lists control items for the electronic expansion valve including open and feedback controls.

3.12 Malfunctions

Identifies sensors prone to malfunction and detection of overcurrent/overload.

Service Diagnosis

1. General Problem Symptoms and Check Items

Lists common symptoms and initial checks for troubleshooting unit operation issues.

2. Troubleshooting with LED

Guides on troubleshooting using indoor and outdoor unit LED indicators.

2.1 Indoor Unit LED Troubleshooting

Details the meaning of the operation lamp blinking on the indoor unit.

3. Service Diagnosis Methods

Provides two methods for diagnosing errors using the remote controller.

Method 2 Diagnostic Steps

Details initial steps for diagnosing errors using Method 2, including button presses.

Method 2 Diagnostic Steps Continued

Continues diagnostic steps for Method 2, including sound diagnosis and error code determination.

4. Troubleshooting Guides

Introduces the section detailing troubleshooting for various error codes.

4.2 Indoor Unit PCB Abnormality (A1)

Explains error A1, its causes, and troubleshooting steps for indoor unit PCB issues.

Indoor Unit PCB Abnormality Troubleshooting Flowchart

Provides a visual guide for diagnosing indoor unit PCB problems step-by-step.

4.3 Freeze-up Protection; Heating Peak-cut Control (A5)

Details error A5 related to freeze-up protection and heating peak-cut control.

4.4 Indoor Fan Motor Abnormality (A6)

Explains error A6 concerning indoor fan motor issues and their potential causes.

Indoor Fan Motor Abnormality Troubleshooting Flowchart

Provides a visual guide for diagnosing indoor fan motor problems step-by-step.

4.5 Thermistor or Related Abnormality (Indoor Unit)

Covers errors C4 and C9 related to indoor unit thermistors and their troubleshooting.

4.6 Low-voltage or Over-voltage Detection (U2)

Explains error U2 related to power supply voltage abnormalities and their causes.

Low-voltage;Over-voltage Detection Troubleshooting Flowchart

Provides a visual guide for diagnosing power supply voltage issues step-by-step.

4.7 Signal Transmission Error (Indoor;Outdoor Unit) (U4)

Details error U4 concerning communication issues between indoor and outdoor units.

Signal Transmission Error (U4) Troubleshooting Flowchart

Provides a visual guide for diagnosing indoor/outdoor unit communication errors.

4.8 Signal Transmission Error on Outdoor Unit PCB (U7)

Explains error U7 related to communication on the outdoor unit PCB and its causes.

4.9 Mismatching of Indoor;Outdoor Unit (UA)

Covers error UA for incompatible unit combinations or wiring issues.

4.10 Outdoor Unit PCB Abnormality (E1)

Explains error E1 related to outdoor unit PCB malfunctions and troubleshooting.

4.11 OL Activation (Compressor Overload) (E5)

Details error E5 indicating compressor overload or OL activation and its causes.

OL Activation (E5) Troubleshooting Flowchart

Provides a visual guide for diagnosing compressor overload issues step-by-step.

Trial Operation and Field Settings

Daikin RX36NMVJU Specifications

General IconGeneral
Cooling Capacity3.6 kW
RefrigerantR32
Heating Capacity4.0 kW
Outdoor Unit Weight32 kg
TypeSplit System
Power Supply220-240 V, 50 Hz

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