Daikin VRV Series - User Manual

System Air Conditioner
OPERATION MANUAL
RSUYQ4AVM
RSUYQ5AVM
RSUYQ6AVM
RSUYQ4AVMA
RSUYQ5AVMA
RSUYQ6AVMA
RSUYQ7AYM
RSUYQ8AYM
00_CV_3P344160-11V.indd 1 08-Oct-20 9:22:43 AM

Summary

Definitions

Meaning of Warnings and Symbols

Explains the meaning of DANGER, WARNING, CAUTION, NOTICE, and INFORMATION symbols used in the manual.

Meaning of Used Terms

Defines key terms like "Installation manual" and "Operation manual" for clarity.

Safety Precautions

Provides essential safety guidelines for operating and maintaining the air conditioner.

Introduction

General Information

Provides an overview of the VRV heat pump system and its indoor units.

System Layout

Illustrates the main components and connections within the VRV system.

Before Operation

User Interface

Operation Range

Operation Procedure

Cooling, Heating, Fan Only, Automatic Operation and Dry Operation

Explains how to select and adjust operation modes like cooling, heating, fan only, automatic, and dry.

Program Dry Operation

Details the program dry operation function for humidity reduction with minimal cooling.

Adjusting the Air Flow Direction

Guides on how to adjust the air flow direction using different user interfaces.

Setting the Master User Interface

Explains the procedure to designate a master user interface for system control.

Precautions for Group Control System or Two User Interface Control System

Provides precautions for group control and dual user interface systems.

Energy Saving and Optimum Operation

Maintenance

Maintenance After a Long Stop Period

Provides steps for maintenance before the start of the operating season.

Maintenance Before a Long Stop Period

Details maintenance tasks to perform before the end of the operating season.

Symptoms That Are Not Air Conditioner Troubles

The System Does Not Operate

Describes common scenarios where the system appears not to operate but is functioning normally.

Fan Operation Is Possible, but Cooling;Heating Do Not Work

Explains why cooling or heating may not start immediately after system power-on.

The Fan Strength Does Not Correspond to the Setting

Details reasons why fan strength might not match the selected setting.

The Fan Direction Does Not Correspond to the Setting

Explains when the fan direction indication may not match the actual air flow direction.

White Mist Comes Out of a Unit

Explains the phenomenon of white mist appearing from indoor or outdoor units.

The User Interface Display Reads U4 or U5 and Stops

Describes issues related to UI display "U4" or "U5" and temporary stops.

Noise of Air Conditioners

Describes various normal operational noises from indoor and outdoor units.

Dust Comes Out of the Unit

Explains why dust may be emitted from the unit, especially after first use.

The Units Can Give Off Odours

Explains how the unit may absorb and emit room or object odors.

The Outdoor Unit Fan Does Not Spin

Explains that the outdoor unit fan speed is controlled for optimal operation.

The Display Shows 88

Describes the "88" display as normal initialization for the user interface.

The Compressor in the Outdoor Unit Does Not Stop

Explains why the compressor may not stop immediately after short heating operations.

The Inside of an Outdoor Unit is Warm Even When the Unit Has Stopped

Explains that the warm outdoor unit is due to the crankcase heater.

Does Not Cool Very Well

Suggests checking Program Dry Operation for cooling performance issues.

Hot Air Can Be Felt When the Indoor Unit Is Stopped

Explains that hot air may be felt when other units are running on the same system.

Troubleshooting

System Does Not Operate at All

Guides on checking power, fuses, and breakers for systems that do not operate.

System Goes into Fan Only Operation, then Stops

Troubleshooting steps for systems that stop after switching to cooling operation.

Cooling or Heating Is Insufficient

Provides checks for insufficient cooling or heating, including airflow and settings.

After-sales Service and Warranty

Warranty Period

Details the warranty card and its importance for repairs.

Recommendations for Maintenance and Inspection

Recommends professional maintenance and inspection contracts for optimal unit performance.

Recommended Inspection and Maintenance Cycles

Lists recommended inspection and maintenance cycles for various components.

Shortening of Maintenance Cycle and Replacement Cycle

Identifies situations where maintenance and replacement cycles may need to be shortened.

Malfunction Codes

Overview

1. Function Description
2. Usage Features
3. Maintenance Features

This document is an operation manual for the Daikin VRV System Air Conditioner, covering models such as RSUYQ4AVM, RSUYQ5AVM, RSUYQ6AVM, RSUYQ4AVMA, RSUYQ5AVMA, RSUYQ6AVMA, RSUYQ7AYM, and RSUYQ8AYM. It provides essential information for users to operate and maintain their air conditioning system properly.

Function Description

The Daikin VRV System Air Conditioner is designed for both heating and cooling applications, depending on the specific outdoor unit series. The system supports various operation modes, including:

• Cooling and Heating (air to air): This is the primary function, allowing users to adjust the room temperature for comfort.
• Fan only operation (air to air): This mode circulates air without heating or cooling, useful for ventilation.
• Dry operation: This program is designed to decrease room humidity with minimal temperature reduction, making it suitable for humid environments where excessive cooling is not desired. The microcomputer automatically determines temperature and fan speed in this mode.
• Automatic operation: This mode allows the system to automatically select the appropriate heating or cooling mode based on the room temperature.

The system can be controlled via a user interface, which may be a wired or wireless remote controller, depending on the indoor unit type. The user interface allows for selection of operation mode, temperature setting, fan speed adjustment, and air flow direction.

For systems with multiple indoor units, a master user interface can be designated to control the operation mode for all connected slave units, ensuring synchronized operation. In mixed systems with VRV and RA indoor units, the master allocation might default to the RA indoor unit's user interface.

Advanced energy-saving functionalities are integrated into the system, allowing for optimization between energy consumption and comfort levels. Users can consult their installer or dealer to modify parameters to suit their specific building needs.

Usage Features

The manual outlines several key usage features to ensure safe and effective operation:

• Temperature and Humidity Ranges: The system operates within specific outdoor and indoor temperature and humidity ranges. For instance, outdoor temperatures can range from -5°C to 52°C DB, and indoor temperatures from 21°C to 32°C DB. Operating outside these conditions may activate safety devices or impair performance.
• Starting and Stopping: To start the system, users select the desired operation mode (Cooling, Heating, Fan only, Dry, or Automatic) and press the ON/OFF button. The operation lamp illuminates, indicating the system is active. To stop, the ON/OFF button is pressed again, and the lamp turns off. A 5-minute waiting period after stopping is recommended to allow the drain pump to complete its residual operation and prevent water leakage.
• Temperature Adjustment: Users can adjust the desired temperature using dedicated buttons on the user interface, typically in 1°C increments. Temperature setting is not available in fan-only mode.
• Fan Speed Control: The fan speed can be adjusted to preference using the fan speed control button on the user interface.
• Air Flow Direction Adjustment: The air flow direction can be set to automatic swing or fixed at a desired position. For certain indoor unit types (double-flow, multi-flow, corner, ceiling-suspended, and wall-mounted), the air flow flap adjusts its position. A microcomputer may control the air flow direction, overriding the display, under specific conditions like low room temperature during cooling or high room temperature during heating, or during defrost operation.
• Hot Start Function: To prevent cold air from blowing out at the start of heating, the indoor fan is automatically stopped, and the user interface displays " ". The fan will start after a short delay, which is normal.
• Defrost Operation: During heating, if the outdoor unit's coil freezes, the system enters defrost operation. The indoor unit fan stops, and the refrigerant cycle reverses to defrost the outdoor coil. The indoor unit display will show " " during this time.
• Group Control and Two User Interface Control: The system supports group control, where one user interface manages up to 16 indoor units, and two user interface control, where two interfaces control one indoor unit or a group of indoor units.

Maintenance Features

The manual provides guidelines for maintenance to ensure the longevity and optimal performance of the air conditioner:

• Regular Cleaning: Users are advised to clean air filters and casings of indoor units. Details on how to perform this cleaning are provided in the operation manual supplied with the indoor units.
• Maintenance After Long Stop Periods (Beginning of Season): Before resuming operation after a long stop, users should check and remove any obstructions from the inlet and outlet vents of both indoor and outdoor units. The main power switch should be turned on at least 6 hours before operating the unit to ensure smooth startup.
• Maintenance Before Long Stop Periods (End of Season): Before extended periods of inactivity, it is recommended to run the indoor units in fan-only operation for about half a day to dry their interiors. Afterward, the main power should be turned off, and air filters and casings should be cleaned.
• Professional Maintenance and Inspection Contract: Due to dust accumulation over time, which can degrade performance, Daikin recommends entering into a maintenance and inspection contract with a qualified service company. This ensures proper cleaning of internal parts, which requires technical expertise.
• Recommended Inspection and Maintenance Cycles: The manual includes tables outlining recommended inspection and maintenance cycles for various components, such as electric motors, PCB boards, heat exchangers, sensors, user interfaces, drain pans, expansion valves, and electromagnetic valves. These cycles are based on normal use (10 hours/day, 2,500 hours/year, and not starting/stopping more than 6 times/hour).
• Shortening of Maintenance and Replacement Cycles: In certain conditions, such as high heat and humidity fluctuations, frequent power fluctuations, vibrations, presence of dust, salt, harmful gas, or oil mist, or continuous 24-hour operation, maintenance and replacement cycles may need to be shortened.
• Troubleshooting: The manual lists common symptoms that are not indicative of a malfunction, such as delays in startup, fan speed not matching settings, or white mist from the unit. It also provides troubleshooting steps for actual malfunctions, advising users to contact their dealer if problems persist.
• Warranty and After-Sales Service: The product comes with a warranty card that should be kept safe. For repairs within the warranty period or for any after-sales service, users should contact their dealer, providing the model name, manufacturing number, installation date, and details of the defect.
• Disposal: When discarding the unit, users must contact their dealer, as it contains hydrofluorocarbon refrigerant that must be collected, transported, and discarded according to legal regulations.

Daikin VRV Series Specifications

General

Type	Variable Refrigerant Volume (VRV)
Energy Efficiency	High
Refrigerant	R410A or R32
Inverter Technology	Yes
Control	Centralized
Application	Residential, Commercial
Indoor Unit Types	Ceiling Cassette, Ceiling Suspended, Wall Mounted, Floor Standing, Concealed Duct
Outdoor Unit Options	Multiple Units
Noise Level (Indoor Unit)	19 dB(A) to 45 dB(A)