Daikin R56NUY1 User Manual

Pocket
Manual
Service Diagnosis
Si20 - 701_B

Daikin R56NUY1 Specifications

General

Brand	Daikin
Model	R56NUY1
Category	Air Conditioner
Language	English

Summary

2. Symptom-based Troubleshooting

2.2 Equipment does not Operate

Details troubleshooting steps for when the equipment does not operate.

2.3 Indoor Unit Fan Operates, but Compressor does not Operate

Addresses troubleshooting when the indoor fan runs but the compressor does not.

2.4 Cooling / Heating Operation Starts but Stops Immediately

Troubleshooting steps for intermittent cooling or heating operation.

2.5 After Unit Shuts Down, It cannot be Restarted for a While

Addresses issues with unit restart after shutdown.

2.6 Equipment Operates but does not Provide Cooling

Troubleshooting for units that operate but do not provide cooling.

2.7 Equipment Operates but does not Provide Heating

Troubleshooting for units that operate but do not provide heating.

2.8 Equipment Discharges White Mist

2.9 Equipment Produces Loud Noise or Vibration

2.10 Equipment Discharges Dust

3. Troubleshooting by Remote Controller

3.1 Procedure of Self-diagnosis by Remote Controller

3.2 Error Codes and Description

Lists and describes common error codes for indoor units.

3.3 Detailed Error Codes

Provides detailed explanations and diagnoses for various error codes.

3.4 A0 Error of External Protection Device

Addresses the A0 error related to external protection devices.

3.5 A1 Indoor Unit PCB Abnormality

Troubleshooting for A1 error indicating a defective indoor unit PCB.

3.6 A3 Drain Water Level System Abnormality

Troubleshooting for the A3 error related to the drain water level system.

3.7 A6 Indoor Unit Fan Motor Abnormality

3.14 AJ Capacity Setting Abnormality

3.28 E4 Low Pressure System Abnormality

3.33 E6 Compressor Overcurrent

3.43 H4 Low Pressure Sensor System Abnormality

3.56 L1 Outdoor Unit PCB Abnormality

3.72 LC Transmission Error Between Inverter and Control PCB

3.83 U0 Refrigerant Shortage

3.92 U4 or UF Transmission Error (Between Indoor Unit and Outdoor Unit)

3.97 U9 Transmission Error Between Indoor and Outdoor Units in the Same System

3.100 UA Field Setting Switch Abnormality

3.105 UF Mis-connection of Field Wiring