Daikin ERGA04DAV3 - User Manual

Other manuals for Daikin ERGA04DAV3

Installation Manual16 pages

Questions and Answers

T
Taylor MoyerAug 17, 2025
Why is my Daikin ERGA04DAV3 not sufficiently heating at low outdoor temperatures?
- A
  April SchultzAug 17, 2025
  If your Daikin Heat Pump isn't sufficiently heating the space at low outdoor temperatures, it could be due to several reasons: * The backup heater operation might not be activated. Ensure the backup heater operation mode is enabled. * The backup heater overcurrent circuit breaker might be off. Turn it back on if it is off. * The thermal protector of the backup heater might be activated. If it has, check the water pressure, whether there is air in the system, and the air purge operation, then press the reset button in the switch box. * The backup heater equilibrium temperature may not be configured correctly. Try increasing the equilibrium temperature to activate the backup heater operation at a higher outdoor temperature.
M
Michael BryantAug 20, 2025
How to check temperature settings on Daikin ERGA04DAV3 when it is not heating or cooling?
- P
  Penny FitzgeraldAug 20, 2025
  If your Daikin Heat Pump isn't heating or cooling as expected, first check the temperature setting on the remote controller to ensure it's correct. The issue might stem from an incorrect setting.
D
darrenkleinAug 22, 2025
What to do if Daikin ERGA04DAV3 is not heating or cooling and water flow is low?
- C
  Christine BellAug 23, 2025
  If your Daikin Heat Pump isn't heating or cooling as expected, it might be due to low water flow. Ensure all shut-off valves of the water circuit are completely open, the water filter is clean, and there is no air in the system. Also, check that the water pressure is above 1 bar, the expansion vessel is not broken, and the valve towards the expansion vessel is open. Verify that the resistance in the water circuit isn't too high for the pump.
I
isotoAug 25, 2025
Why won't the compressor start on my Daikin ERGA04DAV3 for space or water heating?
- J
  Joann SandersAug 26, 2025
  If the compressor in your Daikin Heat Pump isn't starting for space or domestic water heating, it could be because the unit is starting outside of its operation range, meaning the water temperature is too low. In this case, the unit uses the backup heater to reach the minimum water temperature first (15°C). Check that the power supply to the backup heater is correctly wired, and the backup heater thermal protector is not activated, and the backup heater contactors are not broken.
L
Leah HernandezAug 27, 2025
Why is my Daikin Heat Pump system making gurgling noises?
- L
  leeamyAug 27, 2025
  If your Daikin Heat Pump system is making gurgling noises after commissioning, it could be caused by air in the system. Purge the air from the system. It can also be caused by various malfunctions. Check if or is displayed on the home screen of the user interface for more information about the malfunction.
K
Kristin BrooksAug 30, 2025
How to fix a noisy pump (cavitation) in my Daikin Heat Pump?
- J
  Jason GarzaAug 30, 2025
  If the pump in your Daikin Heat Pump is making noise (cavitation), it could be due to air in the system. Purge the air manually or use the automatic air purge function. Another possible cause is that the water pressure at the pump inlet is too low. Ensure the water pressure is above 1 bar, the water pressure sensor is not broken, the expansion vessel is not broken, the valve of the water circuit towards the expansion vessel is open, and the pre-pressure setting of the expansion vessel is correct.
M
Michele Brown DVMSep 1, 2025
What to do if Daikin Heat Pump is not heating or cooling and water volume is low?
- J
  Joshua CrawfordSep 1, 2025
  If your Daikin Heat Pump isn't heating or cooling as expected, the water volume in the installation might be too low. Make sure that the water volume in the installation is above the minimum required value.
M
Michelle CampbellSep 4, 2025
Why does the pressure relief valve keep opening on my Daikin ERGA04DAV3 Heat Pump?
- J
  Jason BennettSep 4, 2025
  If the pressure relief valve of your Daikin Heat Pump opens, it could be due to several reasons: * The expansion vessel might be broken. Replace it. * The valve of the water circuit towards the expansion vessel might be closed. Open the valve. * The water volume in the installation might be too high. Ensure it is below the maximum allowed value. * The water circuit head might be too high. Check the installation requirements.
J
Jason WalkerSep 6, 2025
What to do if preferential kWh rate signal was sent by the electricity company and Daikin ERGA04DAV3 compressor does not start?
- A
  arianajonesSep 6, 2025
  If the compressor in your Daikin Heat Pump isn't starting for space heating or domestic water heating, it could be because the preferential kWh rate signal was sent by the electricity company. Wait for the power to return (2 hours max.).
N
Nichole DavidsonSep 9, 2025
Why is the water pressure unusually high at the tapping point of my Daikin Heat Pump?
- I
  imarshallSep 9, 2025
  If the pressure at the tapping point of your Daikin Heat Pump is temporarily unusually high, it could be due to a failing or blocked pressure relief valve. Flush and clean the complete tank, including the piping between the pressure relief valve and the cold water inlet, or replace the pressure relief valve.

Summary

General Safety Precautions

For the Installer

Installation Site Requirements

Electrical Safety Precautions

Detailed safety precautions for electrical work, including risk of electrocution and wiring.

Application Guidelines

Setting Up Space Heating;Cooling

Guides on setting up the space heating/cooling system, considering room count and heat emitter types.

Single Room Setup

Multiple Rooms - One LWT Zone

Multiple Rooms - Two LWT Zones

Setting Up Auxiliary Heat Source

Setting Up Domestic Hot Water Tank

Setting Up Energy Metering

Normal kWh Rate Power Supply

Setting Up Power Consumption Control

Guides on limiting system power consumption by setting power limitation levels via the user interface.

Preparation for Installation

Preparing the Installation Site

Outdoor Unit Site Requirements

Indoor Unit Site Requirements

Preparing Refrigerant Piping

Covers refrigerant piping requirements, including material, diameter, temper grade, thickness, and insulation.

Preparing Water Piping

Covers water piping requirements, including legislation, force, tools, air/moisture, and closed circuits.

Checking Water Volume and Flow Rate

Preparing Electrical Wiring

Introduces electrical wiring preparation, referring to general safety precautions and system compliance.

Preferential kWh Rate Power Supply

Outdoor Unit Electrical Connections

External;Internal Actuator Connections

Installation Process

Mounting the Outdoor Unit

Covers mounting the outdoor unit, including workflow stages and precautions for installation structure and drainage.

Installing the Outdoor Unit

Provides steps and cautions for installing the outdoor unit, including handling with slings and fixing the unit.

Providing Drainage for Outdoor Unit

Mounting the Indoor Unit

Covers mounting the indoor unit, outlining the typical workflow and precautions.

Connecting the Drain Hose

Connecting Refrigerant Piping

Covers connecting refrigerant piping, including workflow stages and precautions.

Guidelines for Refrigerant Piping

Provides guidelines for connecting pipes, including flare surface coating, using wrenches, and tightening torque.

Flaring the Pipe End

Using Stop Valve and Service Port

Connecting Refrigerant Piping to Outdoor Unit

Guides on connecting liquid and gas refrigerant lines from the indoor unit to the outdoor unit's stop valves.

Connecting Refrigerant Piping to Indoor Unit

Details connecting liquid refrigerant lines from the outdoor unit to the indoor unit's connection points.

Checking the Refrigerant Piping

Covers checking refrigerant piping for leaks and performing vacuum drying to remove moisture, air, or nitrogen.

Charging Refrigerant

Covers charging refrigerant, including factory charge, additional charge, and complete recharge procedures.

Determining Additional Refrigerant Amount

Guides on determining additional refrigerant amount based on liquid piping length and minimum floor area requirements.

Charging Additional Refrigerant

Details steps for charging additional refrigerant, connecting cylinder, opening stop valve, and using protective gear.

Connecting Water Piping

Covers connecting water piping, including workflow stages and precautions.

Connecting the Water Piping

Guides on connecting water piping, installing shut-off valves, and connecting domestic hot water pipes.

Connecting Electrical Wiring

Covers connecting electrical wiring, ensuring power supply compliance and typical workflow stages.

Connecting Electrical Wiring to Outdoor Unit

Guides on connecting electrical wiring to the outdoor unit, including stripping wires, connecting cables, and using wire clamps.

Connecting Electrical Wiring to Indoor Unit

Details connecting electrical wiring to the indoor unit, routing wires, and fixing them with cable ties.

Connecting the Main Power Supply

Guides on connecting the main power supply to the indoor unit, with options for low voltage cables.

Connecting Backup Heater Power Supply

Details connecting backup heater power supply, including warnings, cautions, and capacity-dependent power specifications.

Configuration Settings

Accessing Most Used Commands

Explains how to access settings via breadcrumbs or codes and how to change user permission levels.

Configuration Wizard

Guides users through initial system settings via a wizard after the first power-on for proper unit operation.

Setpoint Screen Functionality

Schedule Screen Example

Weather-Dependent Curve

Using Weather-Dependent Curves

Room Settings

Malfunctioning Error Handling

Describes how to display error codes and access malfunction information via the main menu.

Main Zone Configuration

Guides on controlling leaving water temperature for the main zone via setpoint screen and schedule influence.

Additional Zone Configuration

Space Heating;Cooling Modes

Explains how to determine if a heating/cooling model is installed and how to tell the system the operation mode.

Tank Settings

Guides on setting tank temperature using the setpoint screen and activating powerful operation for immediate heating.

Installer Settings Menu

Covers installer settings, including configuration wizard, domestic hot water, backup heater, and emergency settings.

Commissioning the System

Precautions During Commissioning

Provides important precautions for commissioning, including compressor run-in period and warnings about sensors/switches.

Checklist Before Commissioning

Lists items to check before commissioning, ensuring installation is complete, wiring is done, and units are properly mounted.

Checklist During Commissioning

Lists checks for during commissioning: minimum flow rate, air purge, test runs, actuator tests, and underfloor heating screed dryout.

Checking Minimum Flow Rate

Air Purge Functionality

Explains the purpose of air purge and the modes (Manual/Automatic) for removing air from the water circuit.

Performing Operation Test Run

Guides on performing operation test runs for heating/cooling, monitoring temperatures, and stopping tests manually.

Performing Actuator Test Run

Maintenance and Service

Maintenance Safety Precautions

Yearly Maintenance Checklist: Outdoor Unit

Yearly Maintenance Checklist: Indoor Unit

Troubleshooting Common Issues

Troubleshooting Precautions

Provides crucial precautions for troubleshooting, including disconnecting power, not shunting safety devices, and avoiding thermal cut-out resets.

Solving Problems by Symptoms

Provides a table of possible causes and corrective actions for common symptoms, like unit not heating or cooling.

Symptom: Unit Not Heating or Cooling

Symptom: Compressor Not Starting

Symptom: Insufficient Heating at Low Outdoor Temperatures

Solving Problems by Error Codes

Explains how to understand error codes on the user interface and take measures before resetting them.

Error Codes Overview

Field Settings Table

Field Settings Table Details

Daikin ERGA04DAV3 Specifications

General

Weight (Indoor Unit)	10 kg
Weight (Outdoor Unit)	35 kg
Type	Air to Air
Power Supply	220-240V / 50Hz / 1Ph
Operating Temperature Range (Heating)	-15°C to 24°C