Daikin Altherma EVLQ05+08CA, Installer'S Reference Manual

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13 | Troubleshooting
Installer reference guide
212
EHYH EHYHBH/X08AF + EHYKOMB33AA
Daikin Altherma hybrid heat pump
4P355634-1F – 2020.10
Possible causes Corrective action
The 3-way valve is not working
correctly. ▪ Check the installation of the 3-way
valve.
▪ In case of domestic hot water
operation, the flow should be
directed to the tank.
13.4 Solving problems based on error codes
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.
13.4.1 Error codes: Overview
Error codes of the indoor unit
Error code Detailed error code Description
7H 01 Water flow problem.
7H 04 Water flow problem during domestic
hot water production.
Manual reset.
Check the domestic hot water circuit.
7H 05 Water flow problem during heating/
sampling.
Manual reset.
Check the space heating/cooling circuit.
7H 06 Water flow problem during cooling/
defrost.
Manual reset.
Check the plate heat exchanger.
80 00 Returning water temperature
sensor problem.
Please contact your dealer.
81 05 Loosehanging tank
temperature sensor
81 00 Leaving water temperature
sensor problem.
Please contact your dealer.