Daikin Altherma ERHQ011-014-016BA User Manual (English)

Questions and Answers:

A
Alan WangAug 17, 2025
What to do if the compressor does NOT start on my Daikin Altherma ERHQ011-014-016BA?
- M
  makayla55Aug 17, 2025
  If the compressor on your Daikin Air Conditioner doesn't start, it could be due to several reasons. If the water temperature is too low, 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, the backup heater thermal protector is NOT activated and the backup heater contactors are NOT broken. Also, verify that the preferential kWh rate power supply settings and electrical connections match. If a preferential kWh rate signal was sent by the electricity company, wait for the power to return (2 hours max.).
W
warebryanAug 19, 2025
What to do if internal wiring is damaged in Daikin Altherma ERHQ011-014-016BA?
- H
  hhopkinsAug 19, 2025
  The damaged internal wiring has to be replaced by the manufacturer, its service agent or similarly qualified persons.
G
Glenn JohnsonAug 22, 2025
How to fix Daikin Heat Pump not heating enough in cold weather?
- T
  Terry ZamoraAug 22, 2025
  To address insufficient heating at low outdoor temperatures with your Daikin Heat Pump, verify that the backup heater operation mode is enabled. Also, ensure that the thermal protector of the backup heater hasn't been activated by checking the water pressure and for air in the system. After checking these, press the reset button in the switch box.
E
Erica BradleyAug 25, 2025
Why is my Daikin Heat Pump not heating or cooling properly?
- R
  rharperAug 26, 2025
  If your Daikin Heat Pump isn't heating or cooling as expected, start by checking the temperature setting on the remote controller, referring to the operation manual for guidance. Also, ensure the water flow isn't too low by verifying that all shut-off valves are fully open, the water filter is clean, there's no air in the system, the water pressure is above 1 bar, the expansion vessel isn't broken, and the resistance in the water circuit isn't too high for the pump. Finally, confirm the water volume in the installation is above the minimum required value.
H
haileyandersonAug 27, 2025
What to do if Daikin Heat Pump pump is making noise?
- N
  Nicholas BakerAug 27, 2025
  If the pump in your Daikin Heat Pump is making noise (cavitation), it might be due to air in the system or low water pressure at the pump inlet. Purge air from the system or verify that the water pressure is above 1 bar, the manometer is not broken, the expansion vessel is not broken, and the pre-pressure setting of the expansion vessel is correct.
T
Taylor GreenAug 30, 2025
Why does the pressure relief valve keep opening on my Daikin Heat Pump?
- J
  Jamie SmithAug 30, 2025
  If the pressure relief valve on your Daikin Heat Pump opens, it could be due to a broken expansion vessel or the water volume in the installation being too high. Replace the expansion vessel or ensure the water volume in the installation is below the maximum allowed value.
R
Ryan JohnsonSep 5, 2025
Why is the water pressure relief valve leaking on my Daikin Heat Pump?
- A
  Angela MorenoSep 5, 2025
  If the water pressure relief valve on your Daikin Heat Pump leaks, it might be because dirt is blocking the water pressure relief valve outlet. Check whether the pressure relief valve works correctly by turning the red knob on the valve counterclockwise. If you do NOT hear a clacking sound, or if the water keeps running out of the unit, close both the water inlet and outlet shut-off valves first and then contact your dealer.
F
flowersaprilSep 7, 2025
How to fix unusual high pressure at the tapping point of Daikin Heat Pump?
- C
  Cynthia WatkinsSep 7, 2025
  To address temporarily high pressure at the tapping point in your Daikin Heat Pump, flush and clean the complete tank, including the piping between the pressure relief valve and the cold water inlet. If the issue persists, replace the pressure relief valve.
J
James DillonSep 10, 2025
Why is my Daikin Air Conditioner pump making noise (cavitation)?
- K
  kimnicoleSep 10, 2025
  If your Daikin Air Conditioner pump is making noise, it could be due to air in the system. Try purging the air manually or using the automatic air purge function. Another possible cause is low water pressure at the pump inlet. Check that the water pressure is above 1 bar, the manometer isn't broken, the expansion vessel isn't broken and the pre-pressure setting of the expansion vessel is correct.
B
beltranjoshuaSep 13, 2025
What to do if the pressure relief valve opens on my Daikin Air Conditioner?
- F
  froySep 13, 2025
  If the pressure relief valve on your Daikin Air Conditioner opens, check the temperature setting on the remote controller. Also, ensure the water flow isn't too low by verifying that all shut-off valves are completely open, the water filter is clean, and there is no air in the system. Make sure that the water pressure is >1 bar and the expansion vessel is not broken. If the problem persists, the expansion vessel may be broken and need replacement.

Daikin Altherma ERHQ011-014-016BA Specifications

General

Category	Air Conditioner
Model	ERHQ011-014-016BA
Energy Efficiency Class (Heating)	A++
Energy Efficiency Class (Cooling)	A++
Refrigerant	R-410A
Operating Temperature Range (Heating)	-20°C to 35°C
Type	Heat Pump
Heating Capacity	11.2-16.0 kW

Summary

General Safety Precautions

Installation Site Requirements

Details requirements for selecting a suitable installation site for the unit, including space and ventilation.

Refrigerant Safety Precautions

Covers precautions and guidelines for handling refrigerant, including safe practices and charging procedures.

Electrical Safety Precautions

Outlines crucial safety precautions for electrical work, including handling high voltage and wiring.

About the Box and Units

Application Guidelines

Setting up the Space Heating/Cooling System

Guides on configuring the system for space heating and cooling requirements.

Single Room Setup

Multiple Rooms - One LWT Zone Setup

Multiple Rooms - Two LWT Zones Setup

Setting up Auxiliary Heat Source for Space Heating

Guides on integrating an auxiliary boiler into the system for space heating.

Setting up the Domestic Hot Water Tank

Covers the setup of domestic hot water tanks, including system layouts.

Selecting DHW Tank Volume and Temperature

Setting up Energy Metering

Consumed Energy Data

Setting up Power Consumption Control

Explains how to set up power consumption control for the entire system.

Permanent Power Limitation

Power Limitation Activated by Digital Inputs

Setting up External Temperature Sensor

Preparation for Installation

Preparing the Installation Site

Covers site preparation, including choosing a location and avoiding dust.

Outdoor Unit Installation Site Requirements

Details site requirements for the outdoor unit installation.

Indoor Unit Installation Site Requirements

Outlines site requirements for the indoor unit installation.

Preparing Refrigerant Piping

Covers preparation steps for refrigerant piping, including material and insulation.

Refrigerant Piping Requirements

Specifies requirements for refrigerant piping material, diameter, and thickness.

Preparing Water Piping

Covers preparation steps for water piping, including circuit requirements and materials.

Water Circuit Requirements

Covers requirements for the water circuit, including legislation, tools, and materials.

Checking Water Volume and Flow Rate

Preparing Electrical Wiring

Covers general precautions and requirements for preparing electrical wiring.

Preferential kWh Rate Power Supply

Installation Procedure

Mounting the Outdoor Unit

Covers the workflow and precautions for mounting the outdoor unit.

Installation Structure for Outdoor Unit

Guides on ensuring a stable and level installation structure for the outdoor unit.

Installing the Outdoor Unit

Details the steps for physically installing the outdoor unit onto its structure.

Providing Drainage for Outdoor Unit

Explains how to properly provide drainage for condensation from the outdoor unit.

Mounting the Indoor Unit

Covers the workflow and precautions for mounting the indoor unit.

Installing the Indoor Unit

Details the steps for physically installing the indoor unit.

Connecting Refrigerant Piping

Outlines the workflow for connecting refrigerant piping, including precautions and guidelines.

Refrigerant Piping Precautions

Lists essential precautions for connecting refrigerant piping safely and correctly.

Refrigerant Piping Guidelines

Provides guidelines for connecting refrigerant pipes, including tightening torque and flare dimensions.

Flaring the Pipe End

Using Stop Valves and Service Ports

Connecting Refrigerant Piping to Outdoor Unit

Details the steps for connecting refrigerant piping to the outdoor unit.

Connecting Refrigerant Piping to Indoor Unit

Guides on connecting refrigerant piping to the indoor unit.

Checking the Refrigerant Piping

Outlines the process for checking external refrigerant piping, including leak tests and vacuum drying.

Checking Refrigerant Piping Precautions

Lists precautions for leak testing and vacuum drying the refrigerant piping.

Checking for Leaks

Details how to perform a leak check on the refrigerant piping.

Performing Vacuum Drying

Guides on performing vacuum drying to remove moisture and air from the system.

Charging Refrigerant

Explains when additional or complete refrigerant charging might be necessary.

Refrigerant Charging Precautions

Lists precautions to take when charging refrigerant into the system.

Determining Additional Refrigerant Amount

Charging Refrigerant Procedure

Details the process of charging refrigerant into the system.

Connecting the Water Piping

Outlines the workflow for connecting the water piping, including precautions and procedures.

Water Piping Precautions

Lists precautions for connecting water piping, including force and material compatibility.

Connecting the Water Piping

Details the steps for connecting the water piping to the unit.

Filling the Water Circuit

Guides on filling the water circuit with water and purging air.

Connecting the Electrical Wiring

Outlines the workflow for connecting electrical wiring, including compliance and general precautions.

Electrical Compliance

Electrical Wiring Precautions

Lists essential safety precautions for electrical wiring connections.

Electrical Wiring Guidelines

Provides guidelines for connecting electrical wiring, including wire types and terminal tightening.

Connecting Electrical Wiring on Outdoor Unit

Details the process of connecting electrical wiring to the outdoor unit.

Connecting Electrical Wiring on Indoor Unit

Guides on connecting electrical wiring to the indoor unit.

Connecting the Main Power Supply

Details how to connect the main power supply to the unit.

Connecting the Backup Heater Power Supply

Explains how to connect the power supply for the backup heater.

Connecting the User Interface

Guides on connecting the user interface to the indoor unit.

Finishing Outdoor Unit Installation

Covers insulating and fixing piping/cables and installing covers.

Finishing Indoor Unit Installation

Details how to attach the user interface cover to the indoor unit.

Configuration Settings

Basic Configuration

Covers essential configurations like language, time, date, and system layout.

Quick Wizard: Standard Settings

Quick Wizard: System Layout

Quick Wizard: Standard Settings (Continued)

Quick Wizard: Options Configuration

Thermostats and External Sensors Configuration

Quick Wizard: Options Configuration (Continued)

Quick Wizard: Capacities for Energy Metering

Space Heating/Cooling Control

Details the basic settings required for space heating and cooling control.

Leaving Water Temperature: Main Zone

Explains how to set the leaving water temperature for the main zone.

Weather-Dependent Heating Setup

Weather-Dependent Cooling Setup

Leaving Water Temperature: Additional Zone

Explains setting leaving water temperature for an additional zone.

Weather-Dependent Heating Setup for Additional Zone

Weather-Dependent Cooling Setup for Additional Zone

Delta T Source for Leaving Water

Modulation for Leaving Water Temperature

Domestic Hot Water Control: Advanced

Provides advanced settings for domestic hot water control.

Advanced Configuration: Space Heating/Cooling

Details advanced settings for space heating/cooling, including preset leaving water temperatures.

Preset Leaving Water Temperatures

Room Frost Protection Configuration

Enables room frost protection to prevent freezing in rooms.

Advanced Domestic Hot Water Control

Provides advanced settings for domestic hot water control.

Preset Tank Temperatures for DHW

Automatic Heating/Cooling Changeover

Weather Dependent DHW Operation

Heat Source Settings

Covers configuration for heat sources like backup heaters.

Backup Heater Configuration

Configures backup heater operation modes and priorities.

System Settings

Defines system priorities and auto-restart functionality.

Priorities Configuration

Auto-Restart Configuration

Backup Heater Configuration Details

Details backup heater operation modes and parameters.

Auto Emergency Operation

Configures automatic or manual takeover by the backup heater during heat pump failure.

Bivalent Operation Configuration

Configures bivalent operation, allowing an auxiliary boiler to assist heating.

System Settings (Priorities)

Defines priorities for space heating vs. DHW heating, and system operation modes.

Auto-Restart Function Configuration

Preferential kWh Rate Power Supply Configuration

Power Consumption Control Configuration

Explains the power consumption control feature for specific models.

Power Consumption Control Settings

Details modes, types, values, and limits for power consumption control.

Forced Defrost Operation

Commissioning Procedures

Precautions During Commissioning

Lists essential precautions to take before and during commissioning.

Checklist Before Commissioning

Provides a comprehensive checklist of items to verify before starting commissioning.

Checklist During Commissioning

Lists checks to perform during the commissioning process.

Checking Minimum Flow Rate

Air Purge Function

Details how to perform manual and automatic air purging of the water circuit.

Performing Manual Air Purge

Performing Automatic Air Purge

Performing a Test Run

Guides on performing system test runs for heating, cooling, and DHW.

Performing an Actuator Test Run

Details performing test runs for individual actuators like pumps and heaters.

Underfloor Heating Screed Dryout Procedure

Programming Screed Dryout Schedule

Hand-over to the User

Maintenance and Service

Maintenance Safety Precautions

Outlines safety precautions to be taken before performing maintenance or service work.

Yearly Maintenance Checklist: Outdoor Unit

Lists checks for yearly maintenance of the outdoor unit's heat exchanger.

Yearly Maintenance Checklist: Indoor Unit

Lists checks for yearly maintenance of the indoor unit's components.

Troubleshooting Common Issues

Troubleshooting Precautions

Lists essential precautions for troubleshooting, including safety and device handling.

Solving Problems by Symptom

Provides solutions for common symptoms like no heating/cooling or compressor issues.

Symptom: Unit Not Heating or Cooling

Provides solutions for symptoms where the unit is not heating or cooling correctly.

Symptom: Compressor Not Starting

Offers solutions for compressor start-up issues during heating or DHW operation.

Symptom: Pump Noise (Cavitation)

Symptom: Pressure Relief Valve Opens

Symptom: Water Volume Too High

Symptom: Water Circuit Head Too High

Symptom: Water Pressure Relief Valve Leaks

Symptom: Insufficient Heating at Low Outdoor Temperatures

Symptom: Unusual High Tapping Point Pressure

Symptom: Swollen Tank Pushing Panels

Symptom: Tank Disinfection Function Not Completed (AH-error)

Solving Problems Based on Error Codes

Provides solutions for common error codes displayed on the unit.

Error Codes Overview: Indoor Unit

Lists error codes related to the indoor unit and their descriptions.

Technical Data

Outdoor Unit Dimensions

Outdoor Unit Service Space

Indoor Unit Dimensions and Service Space

Outdoor Unit Piping Diagram

Indoor Unit Piping Diagram

Outdoor Unit Wiring Diagram

Provides the electrical wiring diagram for the outdoor unit.

Indoor Unit Wiring Diagram

Provides the electrical wiring diagram for the indoor unit, including options and configurations.

Electrical Connection Diagram

Shows a comprehensive electrical connection diagram for the entire system, including optional parts and field supply.

Technical Specifications: Outdoor Unit

Technical Specifications: Indoor Unit

Operation Range: Heating and Cooling

Operation Range: Domestic Hot Water

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Daikin Altherma ERHQ011-014-016BA User Manual

Table of Contents

Questions and Answers:

Daikin Altherma ERHQ011-014-016BA Specifications

Summary

General Safety Precautions

Installation Site Requirements

Refrigerant Safety Precautions

Electrical Safety Precautions

About the Box and Units

Application Guidelines

Setting up the Space Heating/Cooling System

Single Room Setup

Multiple Rooms - One LWT Zone Setup

Multiple Rooms - Two LWT Zones Setup

Setting up Auxiliary Heat Source for Space Heating

Setting up the Domestic Hot Water Tank

Selecting DHW Tank Volume and Temperature

Setting up Energy Metering

Consumed Energy Data

Setting up Power Consumption Control

Permanent Power Limitation

Power Limitation Activated by Digital Inputs

Setting up External Temperature Sensor

Preparation for Installation

Preparing the Installation Site

Outdoor Unit Installation Site Requirements

Indoor Unit Installation Site Requirements

Preparing Refrigerant Piping

Refrigerant Piping Requirements

Preparing Water Piping

Water Circuit Requirements

Checking Water Volume and Flow Rate

Preparing Electrical Wiring

Preferential kWh Rate Power Supply

Installation Procedure

Mounting the Outdoor Unit

Installation Structure for Outdoor Unit

Installing the Outdoor Unit

Providing Drainage for Outdoor Unit

Mounting the Indoor Unit

Installing the Indoor Unit

Connecting Refrigerant Piping

Refrigerant Piping Precautions

Refrigerant Piping Guidelines

Flaring the Pipe End

Using Stop Valves and Service Ports

Connecting Refrigerant Piping to Outdoor Unit

Connecting Refrigerant Piping to Indoor Unit

Checking the Refrigerant Piping

Checking Refrigerant Piping Precautions

Checking for Leaks

Performing Vacuum Drying

Charging Refrigerant

Refrigerant Charging Precautions

Determining Additional Refrigerant Amount

Charging Refrigerant Procedure

Connecting the Water Piping

Water Piping Precautions

Connecting the Water Piping

Filling the Water Circuit

Connecting the Electrical Wiring

Electrical Compliance

Electrical Wiring Precautions

Electrical Wiring Guidelines

Connecting Electrical Wiring on Outdoor Unit

Connecting Electrical Wiring on Indoor Unit

Connecting the Main Power Supply

Connecting the Backup Heater Power Supply

Connecting the User Interface

Finishing Outdoor Unit Installation

Finishing Indoor Unit Installation

Configuration Settings

Basic Configuration

Quick Wizard: Standard Settings

Quick Wizard: System Layout

Quick Wizard: Standard Settings (Continued)

Quick Wizard: Options Configuration

Thermostats and External Sensors Configuration

Quick Wizard: Options Configuration (Continued)