Daikin Super Multi NX 5MKS90E2V3B - User Manual

Service
Manual
SiBE121021_C
E-Series / F-Series / G-Series
[Applied Models]
● Inverter Multi : Cooling Only
● Inverter Multi : Heat Pump

Summary

Service Manual

Part 1 List of Functions

1. Functions

1.1 Cooling Only - Indoor Unit

1.2 Cooling Only - Outdoor Unit

1.3 Heat Pump - Indoor Unit

1.4 Heat Pump - Outdoor Unit

Part 2 Specifications

1. Specifications

Provides detailed technical specifications for various indoor and outdoor units, including capacity, airflow, power, and dimensions.

1.1 Cooling Only - Indoor Unit

Lists detailed specifications for various indoor unit types (Wall Mounted, Floor Standing, etc.) for cooling-only operation.

1.2 Cooling Only - Outdoor Unit

Provides detailed technical specifications for cooling-only outdoor units, covering compressor, refrigerant, and electrical data.

1.3 Heat Pump - Indoor Unit

Lists detailed specifications for various indoor unit types for heat pump operation, including capacity and airflow.

1.4 Heat Pump - Outdoor Unit

Provides detailed technical specifications for heat pump outdoor units, including compressor, refrigerant, and electrical data.

Part 4 Function and Control

4.2 Frequency Control

4.12 Electronic Expansion Valve Control

4.13 Malfunctions

Covers malfunction detection for sensors, overcurrent, overload, and refrigerant shortage.

4.13.1 Sensor Malfunction Detection

Details how sensor malfunctions in thermistors and current transformers are detected.

4.13.2 Detection of Overcurrent and Overload

Explains the detection of excessive output current and OL temperature to protect the compressor.

4.13.3 Refrigerant Shortage Control

Describes methods for detecting refrigerant shortage based on power consumption and discharge pipe temperature.

4.13.4 Anti-icing Function

Part 6 Service Diagnosis

1. Troubleshooting with LED

Guides on troubleshooting indoor and outdoor unit errors based on operation lamp blinking patterns.

1.1 Indoor Unit

Details troubleshooting for indoor unit errors indicated by the operation lamp.

1.2 Outdoor Unit

Explains troubleshooting for outdoor unit errors indicated by the LED lights on the PCB.

2. Problem Symptoms and Measures

Lists common problem symptoms and their corresponding measures for diagnosis and repair.

3. Service Check Function

3.1 RA Indoor Unit - F(C)TXG, FTXS, ATXS, FVXS, FLK(X)S, FDK(X)S Series

3.2 SA Indoor Unit - FFQ, FCQ, FDBQ, FBQ, FHQ Series

4. Code Indication on Remote Controller

Provides a list of error codes and their descriptions indicated on the remote controller.

4.1 RA Indoor Unit - F(C)TXG, FTXS, ATXS, FVXS, FLK(X)S, FDK(X)S Series

Lists error codes for RA Indoor Units and their corresponding descriptions and reference pages.

4.2 SA Indoor Unit - FFQ, FCQ, FDBQ, FBQ, FHQ Series

Lists error codes for SA Indoor Units and their corresponding descriptions and reference pages.

4.3 Outdoor Unit

Details error codes indicated by outdoor unit LED lamps and their corresponding descriptions.

5. Troubleshooting for RA Indoor Unit - F(C)TXG, FTXS, ATXS, FVXS, FLK(X)S, FDK(X)S Series

Troubleshooting guide for specific RA Indoor Unit abnormalities like PCB, thermistor, and signal errors.

5.1 Indoor Unit PCB Abnormality

Details troubleshooting steps for indoor unit PCB abnormalities.

5.2 Freeze-up Protection Control or Heating Peak-cut Control

Troubleshooting for freeze-up protection and heating peak-cut controls related to indoor heat exchanger temperature.

5.3 Fan Motor or Related Abnormality

Troubleshooting steps for fan motor or related abnormalities, including DC motor and AC motor types.

5.4 Thermistor or Related Abnormality (Indoor Unit)

Guides on troubleshooting thermistor or related abnormalities in indoor units.

5.5 Front Panel Open; Close Fault (FTXG and CTXG Series)

5.6 Signal Transmission Error (between Indoor Unit and Outdoor Unit)

Troubleshooting signal transmission errors between indoor and outdoor units.

5.7 Unspecified Voltage (between Indoor Unit and Outdoor Unit)

6. Troubleshooting for SA Indoor Unit - FFQ, FCQ, FDBQ, FBQ, FHQ Series

Troubleshooting guide for specific SA Indoor Unit abnormalities like PCB, drain, motor, and thermistor errors.

6.1 Indoor Unit PCB Abnormality

Details troubleshooting steps for indoor unit PCB abnormalities.

6.2 Drain Water Level System Abnormality

Troubleshooting for drain water level system abnormalities, including float switch and pump issues.

6.3 Fan Motor or Related Abnormality

Guides on troubleshooting fan motor or related abnormalities for FFQ, FCQ, FDBQ, FBQ, FHQ Series.

6.4 Swing Motor Lock (FHQ Series)

6.5 Drain System Abnormality

Troubleshooting for drain system abnormalities, including pipe installation and float switch issues.

6.6 Thermistor or Related Abnormality

Guides on troubleshooting thermistor or related abnormalities for SA Indoor Units.

6.7 Remote Controller Thermistor Abnormality

Troubleshooting steps for abnormalities related to the remote controller thermistor.

6.8 Signal Transmission Error (between Indoor Unit and Remote Controller)

Troubleshooting signal transmission errors between indoor units and remote controllers.

6.9 Signal Transmission Error (between MAIN Remote Controller and SUB Remote Controller)

Details troubleshooting for signal transmission errors between MAIN and SUB remote controllers.

6.10 Field Setting Abnormality

Troubleshooting steps for abnormalities related to incorrect field settings.

7. Troubleshooting for Outdoor Unit

Comprehensive troubleshooting guide for outdoor unit issues, including anti-icing, PCB, compressor, and fan problems.

7.1 Anti-icing Function

Troubleshooting for anti-icing function issues detected by indoor/outdoor thermistors.

7.2 Outdoor Unit PCB Abnormality

Details troubleshooting steps for outdoor unit PCB abnormalities.

7.3 OL Activation (Compressor Overload)

Troubleshooting compressor overload conditions detected by OL activation.

7.4 Compressor Lock

Guides on troubleshooting compressor lock conditions based on waveform and running status.

7.5 DC Fan Lock

Troubleshooting steps for DC fan lock errors detected by Hall IC rotation speed.

7.6 Input Overcurrent Detection

Details troubleshooting for input overcurrent detection in the inverter DC section.

7.7 Discharge Pipe Temperature Control

Troubleshooting for discharge pipe temperature control issues detected by the thermistor.

7.8 High Pressure Control in Cooling

Guides on troubleshooting high pressure control issues in cooling mode.

7.9 Compressor Sensor System Abnormality

Troubleshooting steps for compressor sensor system abnormalities related to voltage and current.

7.10 Position Sensor Abnormality

Details troubleshooting for position sensor abnormalities related to compressor startup.

7.11 CT or Related Abnormality

Troubleshooting for CT or related abnormalities detected by compressor frequency and input current.

7.12 Thermistor or Related Abnormality (Outdoor Unit)

Guides on troubleshooting thermistor or related abnormalities in outdoor units.

7.13 Electrical Box Temperature Rise

Troubleshooting for electrical box temperature rise detected by the radiation fin thermistor.

7.14 Radiation Fin Temperature Rise

Details troubleshooting for radiation fin temperature rise detected by the thermistor.

7.15 Output Overcurrent Detection

Troubleshooting for output overcurrent detection in the inverter DC section.

7.16 Refrigerant Shortage

Describes methods to detect refrigerant shortage based on input current and discharge pipe temperature.

7.17 Low-voltage Detection or Over-voltage Detection

Troubleshooting low-voltage and over-voltage detection issues in the DC voltage circuit.

7.18 Signal Transmission Error (on Outdoor Unit PCB)

Details troubleshooting for communication errors between the main PCB and PM1 on the outdoor unit.

7.19 Anti-icing Function in Other Rooms; Unspecified Voltage (between Indoor and Outdoor Units)

8. Check

8.1 Thermistor Resistance Check

8.2 Fan Motor Connector Check

8.3 Hall IC Check

8.4 Power Supply Waveform Check

8.5 Electronic Expansion Valve Check

8.6 Four Way Valve Performance Check

8.7 Inverter Unit Refrigerant System Check

8.8 “Inverter Checker” Check

8.9 Rotation Pulse Check on the Outdoor Unit PCB

8.10 Installation Condition Check

8.11 Discharge Pressure Check

8.12 Outdoor Fan System Check

8.13 Capacitor Voltage Check

8.14 Power Module Check

Part 7 Removal Procedure

1. Outdoor Unit - 50~75 Class

1.1 Removal of Outer Panels

1.2 Removal of Electrical Box

1.3 Removal of PCBs

1.4 Removal of Outdoor Fan; Fan Motor

1.5 Removal of Sound Blankets

1.6 Removal of Coils; Thermistors

1.7 Removal of Distributor

1.8 Removal of Four Way Valve

1.9 Removal of Compressor

2. Outdoor Unit - 80;90 Class

2.1 Removal of Outer Panels

2.2 Removal of Electrical Box

2.3 Removal of PCBs

2.4 Removal of Fan Motor

2.5 Removal of Coils; Thermistors

2.6 Removal of Sound Blankets

2.7 Removal of Compressor

Part 8 Trial Operation and Field Settings

1. Pump Down Operation

2. Forced Operation

3. Wiring Error Check Function

4. Trial Operation

4.1 RA Indoor Unit - F(C)TXG, FTXS, ATXS, FVXS, FLK(X)S, FDK(X)S Series

4.2 SA Indoor Unit - FFQ, FCQ, FDBQ, FBQ, FHQ Series

5. Field Settings

5.1 RA Indoor Unit - F(C)TXG, FTXS, ATXS, FVXS, FLK(X)S, FDK(X)S Series

5.2 SA Indoor Unit - FFQ, FCQ, FDBQ, FBQ, FHQ Series

5.3 Outdoor Unit

6. Application of Silicon Grease to a Power Transistor and a Diode Bridge

Daikin Super Multi NX 5MKS90E2V3B Specifications

General

Model	5MKS90E2V3B
Category	Air Conditioner
Refrigerant	R32
Outdoor Unit Noise Level	48 dB
Power Supply	220-240V, 50Hz