Daikin RY71LUV1 User Manual

Pocket
Manual
Service Diagnosis
Si20 - 701_B

Daikin RY71LUV1 Specifications

General

Model	RY71LUV1
Category	Air Conditioner
Cooling Capacity	7.1 kW
Heating Capacity	8.0 kW
Power Source	220-240 V, 50 Hz
Operating Temperature (Heating)	-15°C to 24°C

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

Addresses issues where the indoor fan runs but the compressor does not.

2.4 Cooling / Heating Operation Starts but Stops Immediately

Covers scenarios where the unit starts and then stops operation quickly.

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

Troubleshoots problems with restarting the unit after it has shut down.

2.6 Equipment Operates but does not Provide Cooling

Addresses issues where the unit operates but does not cool effectively.

2.7 Equipment Operates but does not Provide Heating

Addresses issues where the unit operates but does not heat effectively.

Troubleshooting by Remote Controller

3.1 Procedure of Self-diagnosis by Remote Controller

Details the steps for 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 in-depth explanations for specific error codes.

3.4 A0 Error of External Protection Device

Discusses error code A0 related to the external protection device.

3.5 A1 Indoor Unit PCB Abnormality

Addresses error code A1 concerning abnormalities in the indoor unit PCB.

3.6 A3 Drain Water Level System Abnormality

Covers error code A3 related to drain water level system abnormalities.

3.7 A6 Indoor Unit Fan Motor Abnormality

Details error code A6 concerning indoor unit fan motor abnormalities.

3.8 A6 Fan Motor (M1F) Lock, Overload

Addresses error code A6 related to fan motor lock or overload.

3.9 A7 Swing Flap Motor Abnormality / Lock

Covers error code A7 concerning swing flap motor abnormalities or lock.

3.10 A8 Abnormal Power Supply Voltage

Discusses error code A8 related to abnormal power supply voltage.

3.11 A9 Electronic Expansion Valve Coil (Y1E) Abnormality

Addresses error code A9 concerning the electronic expansion valve coil abnormality.

3.12 AF Drain System Abnormality

Details error code AF related to drain system abnormalities.

3.13 AF Drain Level above Limit

Covers error code AF concerning the drain level exceeding the limit.

3.14 AJ Capacity Setting Abnormality

Addresses error code AJ related to capacity setting abnormalities.

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

Discusses error code C1 related to transmission errors between indoor unit PCB and fan PCB.

3.16 C1 Transmission Error (between Indoor Unit PCB and Adaptor PCB)

Covers error code C1 related to transmission errors between indoor unit PCB and adaptor PCB.

3.17 C4, C5, C9 Thermistor Abnormality

Details error codes C4, C5, C9 concerning thermistor abnormalities.

3.18 C6 Defective Combination (between Indoor Unit PCB and Fan PCB)

Addresses error code C6 related to defective combinations between indoor unit PCB and fan PCB.

3.19 CC Humidity Sensor System Abnormality

Discusses error code CC concerning humidity sensor system abnormalities.

3.20 CJ Remote Controller Thermistor Abnormality

Covers error code CJ related to remote controller thermistor abnormalities.

3.21 E0 Actuation of Safety Device

Details error code E0 related to safety device actuation.

3.23 E1 Outdoor Unit PCB Abnormality

Discusses error code E1 concerning outdoor unit PCB abnormalities.

3.24 E3 High Pressure System Abnormality

Covers error code E3 related to high pressure system abnormalities.

3.25 E3 Abnormally High Pressure Level (HPS)

Details error code E3 concerning abnormally high pressure levels.

3.26 E3 High Pressure Abnormality (HPS)

Addresses error code E3 related to high pressure abnormalities.

3.27 E3 Actuation of High Pressure Switch

Discusses error code E3 related to high pressure switch actuation.

3.28 E4 Low Pressure System Abnormality

Covers error code E4 related to low pressure system abnormalities.

3.29 E4 Actuation of Pressure Sensor

Details error code E4 related to pressure sensor actuation.

3.30 E4 Actuation of Low Pressure Sensor

Addresses error code E4 related to low pressure sensor actuation.

3.31 E4 Low Pressure System Abnormality

Discusses error code E4 concerning low pressure system abnormalities.

3.32 E5 Compressor Motor Lock

Covers error code E5 related to compressor motor lock.

3.33 E6 Compressor Overcurrent

Details error code E6 concerning compressor overcurrent.

3.34 E7 Outdoor Unit Fan Motor Abnormality

Addresses error code E7 related to outdoor unit fan motor abnormalities.

3.35 E9 Electronic Expansion Valve Abnormality

Discusses error code E9 related to electronic expansion valve abnormalities.

3.36 E9 Electronic Expansion Valve Coil Abnormality

Covers error code E9 related to electronic expansion valve coil abnormalities.

3.37 F3 Discharge Pipe Temperature Abnormality

3.38 F3 Discharge Pipe Temperature Control

3.39 F6 Abnormal Heat Exchanging Temperature

3.40 F6 Refrigerant Overcharged

3.41 H3 High Pressure Switch Abnormality

3.42 H3 High Pressure Switch System Abnormality

3.43 H4 Low Pressure Sensor System Abnormality

3.44 H7 Outdoor Unit Fan Motor Signal Abnormality

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

3.46 H9 Outdoor Air Thermistor System Abnormality

3.47 J1 Pressure Sensor Abnormality

3.48 J2 Current Sensor System Abnormality

3.49 J3 Discharge Pipe Thermistor System Abnormality

3.50 J5 Suction Pipe Thermistor Abnormality

3.51 J6 Heat Exchanger Thermistor System Abnormality

3.52 J7 Liquid Pipe Thermistor Abnormality

3.53 J9 Subcooling Heat Exchanger Gas Pipe Thermistor Abnormality

3.54 JA High Pressure Sensor Abnormality

3.55 JC Suction Pipe Pressure Sensor Abnormality

3.56 L1 Outdoor Unit PCB Abnormality

3.57 L1 Outdoor Inverter PCB Abnormality

3.58 L1 Outdoor Unit PCB Abnormality

3.59 L4 Overcurrent of DC Output (Instantaneous)

3.60 L4 Radiation Fin Temperature Rise

3.61 L5 Overcurrent of DC Output (Instantaneous)

3.62 L5 Momentary Overcurrent of Inverter Compressor

3.63 L5 Output Overcurrent Detection

3.64 L5 Inverter Compressor Abnormality

3.65 L5 Output Overcurrent Detection

3.66 (L8) Electronic Thermal Switch (Time Lag)

3.67 L8 Inverter Current Abnormality

3.68 L8 Inverter Compressor Overcurrent

3.69 L8 Electronic Thermal (Time Lag)

3.70 L9 Stall Prevention (Time Lag)

3.71 L9 Inverter Startup Error

3.72 LC Transmission Error Between Inverter and Control PCB

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

3.74 P1 Inverter Over-Ripple Protection

3.75 P1 Open Phase or Power Supply Voltage Imbalance

3.76 P4 Radiation Fin Thermistor Abnormality

3.77 P4 Radiation Fin Thermistor or Related Abnormality

3.78 PJ Defective Capacity Setting

3.79 PJ Error in Capacity Setting

3.80 PJ Field Setting Error after Replacing Main PCB or Defective Combination of PCB

3.81 PJ Defective Combination of Inverter and Fan Driver

3.82 PJ Defective Capacity Setting

3.83 U0 Refrigerant Shortage

3.84 U0 Low Pressure Drop Due to Refrigerant Shortage or Electronic Expansion Valve Failure

3.85 U0 Refrigerant Shortage

3.86 U1 Reverse Phase

3.87 U2 Insufficient Voltage

3.88 U2 Power Supply Voltage Abnormality

3.89 U2 Power Supply Insufficient or Instantaneous Failure

3.90 U2 Power Supply Voltage Abnormality

3.91 U3 Check Operation is not Executed

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

3.93 U4 Transmission Error Between Indoor Unit and Outdoor Unit

3.94 U5 Transmission Error Between Indoor Unit and Remote Controller

3.95 U7 Transmission Error Between Outdoor Units

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

3.100 UA Field Setting Switch Abnormality

3.101 UA Field Setting Switch and Transmission Line Abnormality

3.102 UC Centralized Address Setting Error

3.103 UC Address Duplication of Centralized Controller

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