Daikin R71FUVAL User Manual

Pocket
Manual
Service Diagnosis
Si20 - 701_B

Daikin R71FUVAL Specifications

General

Brand	Daikin
Model	R71FUVAL
Cooling Capacity	7.1 kW
Heating Capacity	8.0 kW
Refrigerant	R410A
Power Supply	220-240V, 50Hz

Summary

Symptom-based Troubleshooting

2.2 Equipment does not Operate

Details troubleshooting steps for when the equipment fails to operate.

2.3 Indoor Unit Fan Operates, but Compressor does not Operate

Troubleshooting guide for scenarios where the indoor fan runs but the compressor does not.

2.4 Cooling / Heating Operation Starts but Stops Immediately

Troubleshooting steps for intermittent operation where cooling/heating cycles stop abruptly.

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

Guidance for troubleshooting issues with delayed unit restarts after shutdown.

2.6 Equipment Operates but does not Provide Cooling

Troubleshooting steps when the unit operates but fails to provide cooling.

2.7 Equipment Operates but does not Provide Heating

Troubleshooting steps when the unit operates but fails to provide heating.

Troubleshooting by Remote Controller

3.1 Procedure of Self-diagnosis by Remote Controller

Explains the step-by-step procedure for performing self-diagnosis using the remote controller.

3.2 Error Codes and Description

Lists and describes various error codes displayed by the system for troubleshooting.

3.2.1 Indoor Unit

Detailed list and descriptions of error codes pertaining to the indoor unit.

3.2.2 Outdoor Unit, System

Detailed list and descriptions of error codes for outdoor units and the overall system.

3.4 A0 Error of External Protection Device

Troubleshooting steps for the 'A0' error related to external protection devices.

3.5 A1 Indoor Unit PCB Abnormality

3.6 A3 Drain Water Level System Abnormality

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

3.23 E1 Outdoor Unit PCB Abnormality

3.24 E3 High Pressure System Abnormality

3.32 E5 Compressor Motor Lock

3.33 E6 Compressor Overcurrent

3.35 E9 Electronic Expansion Valve Abnormality

3.41 H3 High Pressure Switch Abnormality

3.43 H4 Low Pressure Sensor System Abnormality

3.45 H9, J3, J5, J6, J7, J8 Thermistor System Abnormality

3.47 J1 Pressure Sensor Abnormality

3.56 L1 Outdoor Unit PCB Abnormality

3.72 LC Transmission Error Between Inverter and Control PCB

3.83 U0 Refrigerant Shortage

Troubleshooting steps for 'U0' errors indicating refrigerant shortage.

3.86 U1 Reverse Phase

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

3.98 UA Defective Field Setting Switch

3.100 UA Field Setting Switch 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