Daikin VRV III RXYQ5–54PY1 Service Manual R-410A Heat Pump 50Hz (PDF)

Description

Daikin VRV III RXYQ5–54PY1 Service Manual R-410A Heat Pump 50Hz (PDF) DOWNLOAD

Description

✅ What this manual is for

This is the factory Daikin Service Manual (SiE34-601) for VRV III R-410A Heat Pump systems (50Hz) covering outdoor units from RXYQ5PY1 up to RXYQ54PY1 (including High COP “PH” series). It’s the go-to manual for installers, HVAC technicians, and service engineers needing control logic, field settings, diagnostics, and wiring/piping diagrams in one place.

📌 Systems / Models Covered

✅ Outdoor Units (Heat Pump, 50Hz)

• RXYQ5P, 8P, 10P, 12P, 14P, 16P, 18P, 20P … up to 54P (PY1 series)

• High COP Series: RXYQ16PH, 18PH, 24PH … up to 50PH

✅ Indoor Units (Compatible series list includes)

• FXCQ, FXFQ, FXZQ, FXKQ, FXDQ (P/N series), FXSQ, FXMQ, FXHQ, FXAQ, FXLQ, FXNQ, FXUQ

• Outdoor air processing unit: FXMQ125MFV1 / 200MFV1 / 250MFV1

• Connection unit: BEVQ-MA

📂 Manual Contents

Part 1 – General Information

• Model names of indoor/outdoor units

• External appearance (indoor & outdoor)

• Combination of outdoor units

• Model selection guidelines

Part 2 – Specifications

• Outdoor unit specifications

• Indoor unit specifications

Part 3 – Refrigerant Circuit

• Refrigerant circuit diagrams by model (RXYQ5P → RXYQ18P and more)

• Functional parts layout (PCB/component layout)

• Refrigerant flow by operating mode

• Outdoor air processing unit circuit coverage

Part 4 – Function (Control Logic)

• Basic control (normal operation, compressor PI control, EEV PI control, fan control)

• Special control (startup, oil return, defrost, pump-down residual, standby, stopping)

• Protection control (high/low pressure, discharge temp, inverter protection, overload)

• Other control (unit rotation, emergency operation, demand operation, heating prohibition)

• Indoor unit control outline (drain pump, louver, thermostat logic, EEV, hot start, freeze prevention)

Part 5 – Test Operation

• Installation process + test procedure outline

• Power-on operation behavior

• Outdoor unit PCB layout

• Field settings (via remote control + from outdoor unit)

Part 6 – Troubleshooting

• Symptom-based troubleshooting

• Remote control diagnosis + service modes

• Full error code troubleshooting with detailed sections including:

  • Indoor: A0, A1, A3, A6, A7, A9, AF, AJ, C4, C5, C9, CJ

  • Outdoor: E1, E3, E4, E5, E6, E7, E9, F3, F6, H7, H9

  • Sensors/thermistors: J2, J3, J5, J6, J7, J9, JA, JC

  • Inverter: L4, L5, L8, L9, LC

  • Protection: P1, P4, PJ

  • System/communication/power: U0, U1, U2, U3, U4, U5, U7, U8, U9, UA, UC, UE, UF, UH

• Optional controller troubleshooting (central remote, unified ON/OFF)

Part 7 – Appendix

• Piping diagrams (outdoor & indoor)

• Wiring diagrams (outdoor, field wiring, indoor)

• Electrical/functional parts lists

• Options list

• Thermistor resistance/temperature characteristics

• Pressure sensor info

• Inverter transistor/diode module checking method

Part 8 – Precautions for New Refrigerant (R-410A)

• Handling and service precautions

• Refrigerant cylinders

• Service tools

📋 File Details

When a VRV system throws a code or won’t stabilize, guessing gets expensive—this manual gives you the exact control logic, field settings, and wiring/piping diagrams to diagnose fast. Download instantly and get the system running right today