Symptom: Hot Water Does Not Reach The Temperature (Tank Installed); Solving Problems Based On Error Codes; Error Codes: Overview - Daikin Altherma R Hybrid Installer's Reference Manual

13 | Troubleshooting

13.3.19 Symptom: Hot water does NOT reach the temperature (tank installed)

13.4 Solving problems based on error codes

13.4.1 Error codes: Overview

Error codes of the indoor unit
Installer reference guide
182
Possible causes
No heat transfer as a result of lime scale
or fouling in the heat exchanger
domestic hot water side.
Cold water temperature <10°C.
The domestic hot water temperature
fluctuates between hot and cold.
Possible causes
The gas boiler has an error code.
The indoor unit has an error code.
The 3-way valve is not working
correctly.
If the unit runs into a problem, the user interface displays an error code. It is
important to understand the problem and to take measures before resetting an
error code. This should be done by a licensed installer or by your local dealer.
This chapter gives you an overview of all possible error codes and their descriptions
as they appear on the user interface.
For detailed troubleshooting of each error, see the service manual.
Error code Detailed error code Description
7H 01
7H 04
Corrective action
Descale or flush the exchanger
domestic hot water side.
The water inlet temperature is too low.
▪ The flow is too low. To guarantee
comfort, a minimum water flow of 5 l/
min is recommended.
▪ Increase the domestic hot water
setpoint on the domestic hot water
homepage of the user interface.
Corrective action
Check the display of the gas boiler for
more information.
Check for possible errors on the indoor
unit.
▪ Check the installation of the 3-way
valve.
▪ In case of domestic hot water
operation, the flow
directed to the tank.
Water flow problem.
Water flow problem during domestic
hot water production.
Manual reset.
Check the domestic hot water circuit.
CHYHBH05+08AF + EHYKOMB33A
should be
Daikin Altherma R Hybrid
4P471761-1E – 2020.10