Daikin FAY71LVE User Manual

Pocket
Manual
Service Diagnosis
Si20 - 701_B

Daikin FAY71LVE Specifications

General

Cooling Capacity	7.1 kW
Heating Capacity	8.0 kW
Energy Efficiency Ratio (EER)	3.21
Refrigerant	R32
Type	Split System
Seasonal Energy Efficiency Ratio (SEER)	6.10
Outdoor Unit Noise Level	49 dBA
Power Supply	220-240V/50Hz

Summary

List of Applicable Models

R-FU Series

List of applicable outdoor and indoor units for the R-FU Series.

R-KU Series

List of applicable outdoor and indoor units for the R-KU Series.

R-NU Series

List of applicable outdoor and indoor units for the R-NU Series.

RZQ-B Series

List of applicable outdoor and indoor units for the RZQ-B Series.

RZR-HU Series

List of applicable outdoor and indoor units for the RZR-HU Series.

Symptom-based Troubleshooting

2.1 Overview

Provides an overview of troubleshooting symptoms and corresponding measures.

2.2 Equipment does not Operate

Troubleshooting guide for when the equipment fails to operate.

2.4 Cooling / Heating Operation Starts but Stops Immediately

Troubleshooting steps for intermittent operation issues.

2.6 Equipment Operates but does not Provide Cooling

Troubleshooting steps when cooling performance is insufficient.

2.8 Equipment Discharges White Mist

Troubleshooting for issues related to white mist discharge.

Troubleshooting by Remote Controller

3.1 Procedure of Self-diagnosis by Remote Controller

Explains how to use the remote controller for self-diagnosis.

3.1.1 Wired Remote Controller — BRC1C61/BRC1D61

Details self-diagnosis procedures for wired controllers BRC1C61/BRC1D61.

3.1.2 Wired Remote Controller — BRC1E61

Details self-diagnosis procedures for wired controller BRC1E61.

3.2 Error Codes and Description

Lists and describes various error codes for indoor and outdoor units.

3.2.1 Indoor Unit Error Codes

Details error codes specific to indoor units.

3.2.2 Outdoor Unit Error Codes

Details error codes specific to outdoor units and system series.

3.4 A0 Error of External Protection Device

Troubleshooting steps for A0 error related to external protection devices.

3.5 A1 Indoor Unit PCB Abnormality

Troubleshooting guide for A1 error indicating indoor unit PCB abnormality.

3.7 A6 Indoor Unit Fan Motor Abnormality

Troubleshooting for A6 error related to indoor unit fan motor issues.

3.11 A9 Electronic Expansion Valve Coil Abnormality

Troubleshooting steps for A9 error concerning the EEV coil.

3.15 C1 Transmission Error (Indoor Unit PCB to Fan PCB)

Troubleshooting C1 error related to transmission between PCBs.

3.21 E0 Actuation of Safety Device

Troubleshooting guide for E0 error related to safety device activation.

3.23 E1 Outdoor Unit PCB Abnormality

Troubleshooting steps for E1 error indicating outdoor unit PCB issues.

3.24 E3 High Pressure System Abnormality

Troubleshooting guide for E3 error related to high pressure system.

3.28 E4 Low Pressure System Abnormality

Troubleshooting steps for E4 error related to low pressure system.

3.32 E5 Compressor Motor Lock

Troubleshooting guide for E5 error related to compressor motor lock.

3.33 E6 Compressor Overcurrent

Troubleshooting steps for E6 error related to compressor overcurrent.

3.34 E7 Outdoor Unit Fan Motor Abnormality

Troubleshooting for E7 error related to outdoor unit fan motor issues.

3.35 E9 Electronic Expansion Valve Abnormality

Troubleshooting steps for E9 error related to electronic expansion valve.

3.37 F3 Discharge Pipe Temperature Abnormality

Troubleshooting for F3 error related to discharge pipe temperature.

3.40 F6 Refrigerant Overcharged

Troubleshooting guide for F6 error indicating refrigerant overcharge.

3.41 H3 High Pressure Switch Abnormality

Troubleshooting steps for H3 error related to high pressure switch.

3.43 H4 Low Pressure Sensor System Abnormality

Troubleshooting for H4 error related to low pressure sensor system.

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

Troubleshooting for various thermistor system abnormalities.

3.47 J1 Pressure Sensor Abnormality

Troubleshooting steps for J1 error related to pressure sensor.

3.50 J5 Suction Pipe Thermistor Abnormality

Troubleshooting for J5 error related to suction pipe thermistor.

3.56 L1 Outdoor Unit PCB Abnormality

Troubleshooting guide for L1 error indicating outdoor unit PCB abnormality.

3.59 L4 Overcurrent of DC Output (Instantaneous)

Troubleshooting steps for L4 error related to DC output overcurrent.

3.62 L5 Momentary Overcurrent of Inverter Compressor

Troubleshooting for L5 error related to inverter compressor overcurrent.

3.66 (L8) Electronic Thermal Switch (Time Lag)

Troubleshooting for L8 error related to electronic thermal switch.

3.67 L8 Inverter Current Abnormality

Troubleshooting steps for L8 error related to inverter current.

3.70 L9 Stall Prevention (Time Lag)

Troubleshooting for L9 error related to stall prevention.

3.71 L9 Inverter Startup Error

Troubleshooting steps for L9 error related to inverter startup.

3.72 LC Transmission Error Between Inverter and Control PCB

Troubleshooting for LC error between inverter and control PCB.

3.74 P1 Inverter Over-Ripple Protection

Troubleshooting steps for P1 error related to inverter over-ripple protection.

3.75 P1 Open Phase or Power Supply Voltage Imbalance

Troubleshooting for P1 error related to power supply issues.

3.76 P4 Radiation Fin Thermistor Abnormality

Troubleshooting for P4 error related to radiation fin thermistor.

3.78 PJ Defective Capacity Setting

Troubleshooting steps for PJ error related to capacity setting.

3.83 U0 Refrigerant Shortage

Troubleshooting guide for U0 error related to refrigerant shortage.

3.86 U1 Reverse Phase

Troubleshooting steps for U1 error related to reverse phase.

3.87 U2 Insufficient Voltage

Troubleshooting for U2 error related to insufficient voltage.

3.91 U3 Check Operation is not Executed

Troubleshooting steps when check operation is not executed.

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

Troubleshooting U4/UF error for transmission between indoor/outdoor units.

3.94 U5 Transmission Error Between Indoor Unit and Remote Controller

Troubleshooting for U5 error between indoor unit and remote controller.

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

Troubleshooting for U8 error between main and sub remote controllers.

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

Troubleshooting U9 error for transmission between units in the same system.

3.98 UA Defective Field Setting Switch

Troubleshooting steps for UA error related to field setting switch.

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

Troubleshooting UA error for incorrect unit combinations.

3.100 UA Field Setting Switch Abnormality

Troubleshooting for UA error related to field setting switch.

3.102 UC Centralized Address Setting Error

Troubleshooting steps for UC error related to centralized address settings.

3.104 UE Transmission Error between Centralized Controller and Indoor Unit

Troubleshooting for UE error between centralized controller and indoor unit.

3.105 UF Mis-connection of Field Wiring

Troubleshooting steps for UF error related to field wiring mis-connection.

3.106 UF System is not Set yet

Troubleshooting for UF error when the system is not set.

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

Troubleshooting UF error for transmission, piping, or refrigerant issues.

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

Troubleshooting for UF error related to transmission system abnormality.

3.109 UH System Error, Refrigerant System Address Undefined

Troubleshooting UH error for system/refrigerant address issues.