Daikin R42NUY14 User Manual

Pocket
Manual
Service Diagnosis
Si20 - 701_B

Daikin R42NUY14 Specifications

General

Brand	Daikin
Model	R42NUY14
Category	Air Conditioner
Language	English

Summary

Symptom-based Troubleshooting

2.2 Equipment does not Operate

Troubleshooting steps for when the equipment fails to operate.

2.3 Indoor Unit Fan Operates, but Compressor does not Operate

Diagnoses issues when the indoor fan runs but the compressor does not.

2.4 Cooling / Heating Operation Starts but Stops Immediately

Troubleshooting for operations that start and then stop abruptly.

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

Addresses issues where the unit cannot be restarted after shutdown.

2.6 Equipment Operates but does not Provide Cooling

Troubleshooting for units that operate but fail to cool.

2.7 Equipment Operates but does not Provide Heating

Troubleshooting for units that operate but fail to heat.

Troubleshooting by Remote Controller

3.1 Procedure of Self-diagnosis by Remote Controller

Guides on performing self-diagnosis using the remote controller.

3.2 Error Codes and Description

Lists and describes various error codes and their meanings.

3.3 Detailed Error Codes

Provides detailed explanations and diagnostic procedures for specific error codes.

3.4 A0 Error of External Protection Device

Troubleshooting for error code A0 related to external protection devices.

3.5 A1 Indoor Unit PCB Abnormality

Troubleshooting for error code A1 indicating an indoor unit PCB abnormality.

3.6 A3 Drain Water Level System Abnormality

Troubleshooting for error code A3 related to drain water level system abnormalities.

3.7 A6 Indoor Unit Fan Motor Abnormality

Troubleshooting for error code A6 concerning indoor unit fan motor abnormalities.

3.11 A9 Electronic Expansion Valve Coil (Y1E) Abnormality

Troubleshooting for error code A9 related to electronic expansion valve coil abnormalities.

3.15 C1 Transmission Error (between Indoor Unit PCB and Fan PCB)

Troubleshooting for error code C1 regarding transmission between indoor and fan PCB.

3.21 E0 Actuation of Safety Device

3.23 E1 Outdoor Unit PCB Abnormality

3.28 E4 Low Pressure System Abnormality

3.33 E6 Compressor Overcurrent

3.37 F3 Discharge Pipe Temperature Abnormality

3.41 H3 High Pressure Switch Abnormality

3.43 H4 Low Pressure Sensor System Abnormality

3.49 J3 Discharge Pipe Thermistor System Abnormality

3.56 L1 Outdoor Unit PCB Abnormality

3.62 L5 Momentary Overcurrent of Inverter Compressor

3.68 L8 Inverter Compressor Overcurrent

3.73 LC Transmission Error (between Control PCB and Inverter PCB)

3.78 PJ Defective Capacity Setting

3.83 U0 Refrigerant Shortage

3.86 U1 Reverse Phase

3.91 U3 Check Operation is not Executed

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

3.94 U5 Transmission Error Between Indoor Unit and Remote Controller

3.96 U8 Transmission Error Between Main Remote Controller and Sub Remote Controller

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

3.98 UA Defective Field Setting Switch

3.99 UA Improper Combination of Indoor and Outdoor Units, Indoor Units and Remote Controller

3.101 UA Field Setting Switch and Transmission Line Abnormality

3.102 UC Centralized Address Setting Error

3.104 UE Transmission Error between Centralized Controller and Indoor Unit

3.105 UF Mis-connection of Field Wiring

3.106 UF System is not Set yet

3.107 UF Transmission Error between Indoor and Outdoor Unit / Piping and Wiring Mismatch / Refrigerant Shortage

3.108 UF Transmission System Abnormality (between Indoor and Outdoor Units)

3.109 UH System Error, Refrigerant System Address Undefined