Daikin FHYK71FJV1 User Manual

Pocket
Manual
Service Diagnosis
Si20 - 701_B

Daikin FHYK71FJV1 Specifications

General

Model	FHYK71FJV1
Category	Air Conditioner
Cooling Capacity	7.1 kW
Heating Capacity	8.0 kW
Refrigerant	R32
Indoor Unit Dimensions (W x H x D)	1, 280 x 235 x 680 mm
Outdoor Unit Dimensions (W x H x D)	855 x 735 x 330 mm
Power Supply	220-240V

Summary

Symptom-based Troubleshooting

Equipment does not Operate

Detailed troubleshooting steps for when the equipment fails to operate.

Indoor Unit Fan Operates, but Compressor does not Operate

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

Cooling / Heating Operation Starts but Stops Immediately

Troubleshooting for operations that start and then stop abruptly.

Equipment Operates but does not Provide Cooling

Diagnosing lack of cooling performance when the unit is operating.

Equipment Operates but does not Provide Heating

Diagnosing lack of heating performance when the unit is operating.

Troubleshooting by Remote Controller

Procedure of Self-diagnosis by Remote Controller

Steps for performing self-diagnosis using the remote controller.

Error Codes and Description

Comprehensive list and descriptions of error codes for indoor units.

Detailed Error Codes

In-depth explanations and troubleshooting for specific error codes.

A0 Error of External Protection Device

Troubleshooting for error code A0 related to external protection devices.

A1 Indoor Unit PCB Abnormality

Diagnosing issues related to indoor unit PCB abnormalities (Error A1).

A3 Drain Water Level System Abnormality

Troubleshooting for drain water level system abnormalities (Error A3).

A6 Indoor Unit Fan Motor Abnormality

Diagnosing abnormalities with the indoor unit fan motor (Error A6).

A6 Fan Motor (M1F) Lock, Overload

Troubleshooting fan motor lock or overload conditions (Error A6).

A7 Swing Flap Motor Abnormality / Lock

Diagnosing swing flap motor abnormalities or lock conditions (Error A7).

A8 Abnormal Power Supply Voltage

Troubleshooting abnormal power supply voltage issues (Error A8).

A9 Electronic Expansion Valve Coil (Y1E) Abnormality

Diagnosing abnormalities with the electronic expansion valve coil (Error A9).

AF Drain System Abnormality

Troubleshooting drain system abnormalities (Error AF).

AF Drain Level above Limit

Addressing issues where the drain level exceeds the limit (Error AF).

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

Diagnosing transmission errors between indoor unit PCB and fan PCB (Error C1).

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

Diagnosing transmission errors between indoor unit PCB and adaptor PCB (Error C1).

C4, C5, C9 Thermistor Abnormality

Troubleshooting thermistor abnormalities for codes C4, C5, C9.

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

Diagnosing defective combinations between indoor unit PCB and fan PCB (Error C6).

CC Humidity Sensor System Abnormality

Troubleshooting humidity sensor system abnormalities (Error CC).

CJ Remote Controller Thermistor Abnormality

Diagnosing remote controller thermistor abnormalities (Error CJ).

E0 Actuation of Safety Device

E0 Activation of Outdoor Unit Protection Device

E1 Outdoor Unit PCB Abnormality

E3 High Pressure System Abnormality

E3 Abnormally High Pressure Level (HPS)

E3 High Pressure Abnormality (HPS)

E3 Actuation of High Pressure Switch

E4 Actuation of Pressure Sensor

E4 Actuation of Low Pressure Sensor

E4 Low Pressure System Abnormality

E5 Compressor Motor Lock

E6 Compressor Overcurrent

E7 Outdoor Unit Fan Motor Abnormality

E9 Electronic Expansion Valve Abnormality

E9 Electronic Expansion Valve Coil Abnormality

F3 Discharge Pipe Temperature Abnormality

F3 Discharge Pipe Temperature Control

F6 Abnormal Heat Exchanging Temperature

F6 Refrigerant Overcharged

H3 High Pressure Switch Abnormality

H3 High Pressure Switch System Abnormality

H4 Low Pressure Sensor System Abnormality

H7 Outdoor Unit Fan Motor Signal Abnormality

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

H9 Outdoor Air Thermistor System Abnormality

J1 Pressure Sensor Abnormality

J2 Current Sensor System Abnormality

J3 Discharge Pipe Thermistor System Abnormality

J5 Suction Pipe Thermistor Abnormality

J6 Heat Exchanger Thermistor System Abnormality

J7 Liquid Pipe Thermistor Abnormality

J9 Subcooling Heat Exchanger Gas Pipe Thermistor Abnormality

JA High Pressure Sensor Abnormality

JC Suction Pipe Pressure Sensor Abnormality

L1 Outdoor Inverter PCB Abnormality

L1 Outdoor Unit PCB Abnormality

L4 Overcurrent of DC Output (Instantaneous)

L5 Overcurrent of DC Output (Instantaneous)

L5 Momentary Overcurrent of Inverter Compressor

L5 Inverter Compressor Abnormality

L5 Output Overcurrent Detection

(L8) Electronic Thermal Switch (Time Lag)

L8 Inverter Current Abnormality

L8 Inverter Compressor Overcurrent

L9 Stall Prevention (Time Lag)

L9 Inverter Startup Error

LC Transmission Error Between Inverter and Control PCB

LC Transmission Error (between Control PCB and Inverter PCB)

P1 Inverter Over-Ripple Protection

P1 Open Phase or Power Supply Voltage Imbalance

P4 Radiation Fin Thermistor Abnormality

P4 Radiation Fin Thermistor or Related Abnormality

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

PJ Defective Combination of Inverter and Fan Driver

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

Troubleshooting low pressure drop due to refrigerant shortage or EV failure (Error U0).

U0 Refrigerant Shortage

Diagnosing refrigerant shortage issues (Error U0).

U1 Reverse Phase

U2 Insufficient Voltage

U2 Power Supply Insufficient or Instantaneous Failure

U2 Power Supply Voltage Abnormality

U3 Check Operation is not Executed

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

Troubleshooting transmission errors between indoor and outdoor units (Error U4/UF).

U4 Transmission Error Between Indoor Unit and Outdoor Unit

Diagnosing transmission errors between indoor and outdoor units (Error U4).

U4 Transmission Error between Indoor Unit and Outdoor Unit

Troubleshooting transmission errors between indoor and outdoor units (Error U4).

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

UA Field Setting Switch Abnormality

UA Field Setting Switch and Transmission Line Abnormality

UC Centralized Address Setting Error

UC Address Duplication of Centralized Controller

UE Transmission Error between Centralized Controller and Indoor Unit

Troubleshooting transmission errors between centralized controller and indoor unit (Error UE).

UF Mis-connection of Field Wiring

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

Diagnosing transmission errors, piping/wiring mismatches, or refrigerant shortages (Error UF).

UF Transmission System Abnormality (between Indoor and Outdoor Units)

Troubleshooting transmission system abnormalities between indoor and outdoor units (Error UF).

UH System Error, Refrigerant System Address Undefined