Daikin RZQ125C7V1B Service Manual

Pocket
Manual
Service Diagnosis
Si20 - 701_B

Daikin RZQ125C7V1B Specifications

General

Cooling Capacity	12.5 kW
Heating Capacity	14.0 kW
Power Supply	3 Phase, 380-415 V, 50Hz
Indoor Unit Dimensions (HxWxD)	300 x 1000 x 250 mm
Outdoor Unit Dimensions (HxWxD)	800 x 900 x 320 mm
Cooling Capacity (kW)	12.5 kW
Seasonal Energy Efficiency Ratio (SEER)	6.1
Noise Level (Outdoor Unit)	52 dB(A)
Refrigerant	R32

Summary

2. 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 scenarios where the indoor fan runs but the compressor does not.

2.4 Cooling / Heating Operation Starts but Stops Immediately

Troubleshooting for operations that start and then stop abruptly.

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

Explains issues with restarting the unit after shutdown.

2.6 Equipment Operates but does not Provide Cooling

Troubleshooting for units operating but not providing cooling.

2.7 Equipment Operates but does not Provide Heating

Troubleshooting for units operating but not providing heating.

3. Troubleshooting by Remote Controller

3.1 Procedure of Self-diagnosis by Remote Controller

Details the process of performing self-diagnosis using the remote controller.

3.2 Error Codes and Description

Lists and describes various error codes for indoor units.

3.3 Detailed Error Codes

Provides detailed explanations and diagnostic steps for specific error codes.

3.4 A0 Error of External Protection Device

Troubleshooting for external protection device errors.

3.5 A1 Indoor Unit PCB Abnormality

Addresses abnormalities related to the indoor unit PCB.

3.6 A3 Drain Water Level System Abnormality

Troubleshooting for drain water level system abnormalities.

3.7 A6 Indoor Unit Fan Motor Abnormality

Details issues with the indoor unit fan motor.

3.11 A9 Electronic Expansion Valve Coil (Y1E) Abnormality

Addresses abnormalities in the electronic expansion valve coil.

3.12 AF Drain System Abnormality

Troubleshooting for drain system abnormalities.

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

Addresses transmission errors between indoor unit PCB and fan PCB.

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

3.33 E6 Compressor Overcurrent

3.34 E7 Outdoor Unit Fan Motor Abnormality

3.35 E9 Electronic Expansion Valve Abnormality

3.37 F3 Discharge Pipe Temperature Abnormality

3.40 F6 Refrigerant Overcharged

3.41 H3 High Pressure Switch 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

3.47 J1 Pressure Sensor Abnormality

3.56 L1 Outdoor Unit PCB Abnormality

3.59 L4 Overcurrent of DC Output (Instantaneous)

3.62 L5 Momentary Overcurrent of Inverter Compressor

3.66 (L8) Electronic Thermal Switch (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

3.86 U1 Reverse Phase

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

3.98 UA Defective Field Setting Switch

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

3.102 UC Centralized Address Setting Error

3.105 UF Mis-connection of Field Wiring

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

3.109 UH System Error, Refrigerant System Address Undefined