Daikin VRV IV+ RXYTQ16U5YF User Manual

Installer and user reference guide
VRV IV+ heat pump for high ambient
temperatures
RXYTQ8U5/U7YF
RXYTQ10U5/U7YF
RXYTQ12U5/U7YF
RXYTQ14U5/U7YF
RXYTQ16U5/U7YF

Daikin VRV IV+ RXYTQ16U5YF Specifications

General

Model	RXYTQ16U5YF
Category	Heat Pump
Type	VRV IV+
Refrigerant	R410A
Operating Temperature (Cooling)	-5°C to 46°C
Power Supply	3-phase, 380-415V, 50Hz
Operating Temperature (Heating)	-20°C to 15.5°C

Summary

General Safety Precautions

For the Installer: General Safety

Provides general safety instructions for installers, covering risks like burns, electrocution, and material hazards.

Installation Site Safety

Guidelines for selecting a safe installation site, avoiding explosive or hazardous atmospheres.

Refrigerant Safety (R410A/R32)

Safety precautions related to handling refrigerant R410A or R32, including leak and pressure safety.

Refrigerant Leak and Handling Precautions

Take precautions for refrigerant leaks, including ventilation and recovery procedures.

Electrical Safety Precautions

Instructions for safe electrical wiring, earthing, and component handling to prevent shock or fire.

Specific Installer Safety Instructions

Unit Accessibility and Electrical Hazards

Ensuring unit accessibility, preventing electrocution, and handling refrigerant leaks safely.

Refrigerant and Electrical System Safety

Precautions for using R410A refrigerant, electrical wiring standards, and phase protection.

Electrical Connection and Test Operation Safety

Safety for electrical connections, test operation, and handling moving fan parts.

User Safety Instructions

Safe Operation Guidelines

Unit Operation and Electrical Safety

Safety advice on unit operation, fan safety, fuse replacement, and avoiding electrical hazards.

System Modification and Refrigerant Leak Safety

Warnings against unit modification, handling refrigerant leaks, and protecting children from airflow.

Operation

Before Operation Checks

Essential checks and precautions before operating the unit, including electrical safety and compressor protection.

Maintenance and Service

Troubleshooting

General Malfunction Handling

Steps to take for common malfunctions like safety device activation or water leaks, and contacting the dealer.

Solving Problems Based on Error Codes

Guidance on interpreting and correcting malfunction codes displayed on the unit.

Error Codes Overview and Causes

Error Codes Overview

Explains how malfunction codes are displayed and how to interpret them for troubleshooting.

Troubleshooting: E, F, H Codes

Details troubleshooting steps for E, F, and H error codes related to pressure, temperature, and refrigerant.

Troubleshooting: J Codes

Troubleshooting steps for J error codes related to temperature sensors and compressor casing sensors.

Troubleshooting: P, U, Q Codes

Troubleshooting steps for P, U, and Q error codes related to wiring, unit combinations, and addresses.

Troubleshooting: Auto Charging and Leak Detection Codes

Troubleshooting for auto charging, leak detection, and sensor-related errors.

Unit Installation

Opening the Unit and Component Box

Instructions on how to open the outdoor unit and its electrical component box safely.

Mounting the Outdoor Unit

Guidelines for mounting the outdoor unit level on a strong base, considering height and stands.

Foundation and Anchor Point Requirements

Details foundation dimensions, anchor points, and securing the unit with foundation bolts.

Piping Installation

Refrigerant Piping Requirements

Strict cautions for clean, dry, and tight R410A refrigerant piping installation.

Piping Material and Insulation

Selecting Piping Size

Piping Size Between Branch Kits and Units

Pipe Size-Up and Thickness Requirements

Selecting Refrigerant Branch Kits

Connecting Refrigerant Piping

Overview of connecting refrigerant piping, including routing, protection, and guidelines.

Precautions When Connecting Piping

Important notices regarding piping installation compliance, stress, and pressure limits.

Making Knockout Holes and Connecting Field Piping

Connecting Multi Connection Piping Kits

Connecting Refrigerant Branching Kits

Brazing Pipe Ends

Using Stop Valves and Service Ports

Guidelines for handling stop valves and service ports, including opening and closing procedures.

Stop Valve Operation and Torque Specifications

Detailed instructions for opening/closing stop valves and torque specifications.

Handling Service Ports and Tightening Torques

Procedures for handling service ports and specified tightening torques for valves and ports.

Removing Spun Pipes

Checking Refrigerant Piping

Overview of checking refrigerant piping, including leak tests and vacuum drying procedures.

Leak Test and Vacuum Drying Methods

Details methods for leak testing and vacuum drying, depending on power supply status.

Leak Test Setup and Procedure

Setup diagram and steps for performing leak tests using vacuum and pressure methods.

Performing Vacuum Drying

Step-by-step procedure to remove moisture from the system using a vacuum pump.

Insulating the Refrigerant Piping

Precautions When Charging Refrigerant

Essential safety precautions for refrigerant charging, including R410A usage and power supply checks.

Determining Additional Refrigerant Amount

Formula and tables for calculating the additional refrigerant charge based on piping length and capacity.

Refrigerant Charging Flow Chart

Charging Refrigerant Procedure

Detailed steps for pre-charging and manually charging the system with refrigerant.

Multi-Unit Refrigerant Charging

Manually Charging Refrigerant

Procedure for manual refrigerant charging using the operation mode.

Error Codes During Refrigerant Charging

Troubleshooting error codes encountered during refrigerant charging.

Checks After Charging Refrigerant

Electrical Installation

Connecting Electrical Wiring Precautions

Safety precautions for connecting electrical wiring, including multicore cables and authorized electricians.

Field Wiring Overview and Separation

Safety Device Requirements

Requirements for power supply protection devices like fuses and circuit breakers.

Electrical Specifications and Fuse Capacity Calculation

Routing and Fixing Transmission Wiring

Connecting Transmission Wiring

Procedure for connecting transmission wiring between indoor and outdoor units, including terminal connections.

Finishing Transmission Wiring and Routing Power Supply

Connecting Power Supply and Earthing

Instructions for connecting power supply, terminal screws, and proper earthing methods.

Checking Compressor Insulation Resistance

Procedure to check compressor insulation resistance using a mega-tester.

Configuration

Making Field Settings

Guidance on configuring system settings via the master outdoor unit or PC configurator.

Using Mode 2: Field Settings

Procedure for inputting and changing field settings using Mode 2.

Mode 2: Field Settings - Cool/Heat Selection and Te Target

Settings for Cool/Heat selection and target temperature (Te) during cooling operation.

Mode 2: Field Settings - Tc Target, Fan, Manual Charge

Commissioning

Commissioning Overview and Precautions

Pre-Commissioning Checklist

About the Test Run Procedure

Performing a Test Run

Correcting Abnormal Test Run Completion

Hand-over to the User

Maintenance and Service

Maintenance Safety Precautions

Safety guidelines for maintenance, focusing on electrical hazards and electrostatic discharge.

Service Mode Operation: Vacuum Mode

Service Mode Operation: Recover Refrigerant