Error Codes: Overview - Daikin Altherma 3 WS EWSAH06UD 9W Series Installer's Reference Manual

15 | Troubleshooting

15.4.2 Error codes: Overview

Error codes of the unit
Installer reference guide
238
1 Press the left dial to open the main menu and go to
Malfunctioning.
Result: A short description of the error and the error code is
displayed on the screen.
2 Press in the error screen.
Result: A long description of the error is displayed on the
screen.
Error code
7H-01 Water flow problem
7H-04 Water flow problem during domestic hot water
production
7H-05 Water flow problem during heating/sampling
7H-06 Water flow problem during cooling/defrost
7H-07 Water flow problem. Pump deblocking active
80-00 Returning water temperature sensor problem
81-00 Leaving water temperature sensor problem
81-04
Leaving water temperature sensor not
properly mounted
89-01 Heat exchanger freeze-up protection
activated during defrost (error)
89-02
Heat exchanger freeze-up protection
activated during heating / DHW operation.
(warning)
89-03 Heat exchanger freeze-up protection
activated during defrost (warning)
89-05 Heat exchanger freeze-up protection
activated during cooling operation. (error)
89-06 Heat exchanger freeze-up protection
activated during cooling operation.
(warning)
8F-00 Abnormal increase outlet water temperature
(DHW)
8H-00 Abnormal increase outlet water temperature
8H-03 Overheating water circuit (thermostat)
A1-00 Zero cross detection problem
A5-00
OU: High pressure peak cut / freeze
protection problem
AA-01 Backup heater overheated or BUH power cable
not connected
Description
4P675765-1 – 2022.04
EWSAH/X06UD
Daikin Altherma 3 WS