Daikin Super Multi NX FFQ50B8V1B

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

Daikin Super Multi NX FFQ50B8V1B Specifications

General

Brand	Daikin
Model	Super Multi NX FFQ50B8V1B
Category	Air Conditioner
Language	English

Summary

Part 2 Specifications

1.1 Cooling Only - Indoor Unit

1.2 Cooling Only - Outdoor Unit

Part 3 Printed Circuit Board Connector Wiring Diagram

1.1 Wall Mounted Type

Part 4 Function and Control

1. Function of Indoor Unit (RA Models)

4. Control Specification

4.2 Frequency Control

Explains how compressor frequency is determined based on room temperature and load conditions.

Part 5 Operation Manual

Part 6 Service Diagnosis

1. Troubleshooting with LED

Explains how to diagnose issues using LED indicators on indoor and outdoor units.

1.1 Indoor Unit

Lists error codes indicated by blinking LEDs on the indoor unit.

2. Problem Symptoms and Measures

Lists common operational problems and their corresponding corrective measures.

3. Service Check Function

Outlines procedures for checking system status and diagnosing errors using the remote controller.

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

Details service check procedures for specific RA indoor unit series.

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

Details service check procedures for SA indoor units.

4. Code Indication on Remote Controller

Lists error codes displayed on the remote controller and their meanings.

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

Provides error code indications for RA indoor units.

4.3 Outdoor Unit

Lists error codes indicated by LED status on the outdoor unit.

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

Provides troubleshooting steps for specific RA indoor unit series, focusing on PCB abnormalities.

5.1 Indoor Unit PCB Abnormality

Details troubleshooting steps for indoor unit PCB issues.

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

Provides troubleshooting steps for SA indoor units, covering common abnormalities.

6.1 Indoor Unit PCB Abnormality

Details troubleshooting steps for indoor unit PCB abnormalities.

7. Troubleshooting for Outdoor Unit

Provides troubleshooting steps for various issues related to the outdoor unit.

7.1 Anti-icing Function

Explains troubleshooting for the anti-icing function in outdoor units.

7.2 Outdoor Unit PCB Abnormality

Details troubleshooting steps for outdoor unit PCB issues.

7.5 DC Fan Lock

Outlines troubleshooting for DC fan lock issues in outdoor units.

7.6 Input Overcurrent Detection

Details troubleshooting for input overcurrent detection in outdoor units.

7.7 Discharge Pipe Temperature Control

8. Check

8.1 Thermistor Resistance Check

Part 8 Trial Operation and Field Settings

4. Trial Operation

5. Field Settings