Daikin FCQ100C7VEB x 2 User Manual

Pocket
Manual
Service Diagnosis
Si20 - 701_B

Daikin FCQ100C7VEB x 2 Specifications

General

Model	FCQ100C7VEB
Cooling Capacity	10.0 kW
Heating Capacity	11.2 kW
Refrigerant	R410A
Seasonal Energy Efficiency Ratio (SEER)	6.1

Summary

Service Diagnosis

2. Symptom-based Troubleshooting

2.2 Equipment does not Operate

Details potential causes and troubleshooting steps when the equipment fails to start or operate.

2.3 Indoor Unit Fan Operates, but Compressor does not Operate

Troubleshooting guide for scenarios where only the indoor fan is active, but the compressor is not.

2.4 Cooling / Heating Operation Starts but Stops Immediately

Addresses issues where cooling or heating cycles start and then cease prematurely.

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

2.6 Equipment Operates but does not Provide Cooling

2.7 Equipment Operates but does not Provide Heating

3. Troubleshooting by Remote Controller

3.2 Error Codes and Description

Lists and describes various error codes displayed by the remote controller.

3.3 Detailed Error Codes

Provides in-depth explanations and diagnostic details for specific error codes.

3.4 A0 Error of External Protection Device

3.5 A1 Indoor Unit PCB Abnormality

3.6 A3 Drain Water Level System Abnormality

3.7 A6 Indoor Unit Fan Motor Abnormality

3.12 AF Drain System Abnormality

3.17 C4, C5, C9 Thermistor Abnormality

3.21 E0 Actuation of Safety Device

3.23 E1 Outdoor Unit PCB Abnormality

3.24 E3 High Pressure System Abnormality

3.28 E4 Low Pressure System Abnormality

3.32 E5 Compressor Motor Lock

Diagnostic steps for compressor motor lock conditions (Error E5).

3.33 E6 Compressor Overcurrent

Troubleshooting procedures for compressor overcurrent faults (Error E6).

3.35 E9 Electronic Expansion Valve Abnormality

3.40 F6 Refrigerant Overcharged

3.41 H3 High Pressure Switch Abnormality

3.43 H4 Low Pressure Sensor System Abnormality

3.56 L1 Outdoor Unit PCB Abnormality

Steps for diagnosing abnormalities in the outdoor unit PCB (Error L1).

3.59 L4 Overcurrent of DC Output (Instantaneous)

Troubleshooting for instantaneous DC output overcurrent (Error L4).

3.61 L5 Overcurrent of DC Output (Instantaneous)

Diagnostic steps for instantaneous DC output overcurrent (Error L5).

3.62 L5 Momentary Overcurrent of Inverter Compressor

Troubleshooting for momentary overcurrent in the inverter compressor (Error L5).

3.66 (L8) Electronic Thermal Switch (Time Lag)

3.70 L9 Stall Prevention (Time Lag)

3.72 LC Transmission Error Between Inverter and Control PCB

3.75 P1 Open Phase or Power Supply Voltage Imbalance

3.83 U0 Refrigerant Shortage

Steps for diagnosing refrigerant shortage issues (Error U0).

3.86 U1 Reverse Phase

Troubleshooting for reverse phase conditions (Error U1).

3.87 U2 Insufficient Voltage

Diagnostic steps for insufficient voltage conditions (Error U2).

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

3.94 U5 Transmission Error Between Indoor Unit and Remote Controller

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

3.105 UF Mis-connection of Field Wiring

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