Daikin Altherma EAVX-D9WG - Symptom: Decoration Panels Are Pushed Away Due to a Swollen Tank; Symptom: Tank Disinfection Function Is NOT Completed Correctly (AH-Error); Solving Problems Based on Error Codes; To Display the Help Text in Case of a Malfunction

12 Troubleshooting
Installer reference guide
79
EPGA11~16DAV3 + EAVH/X16S18+23DA6V+9W
Daikin Altherma – Low temperature split
4P556070-1 – 2019.02
12.3.10 Symptom: Decoration panels are pushed
away due to a swollen tank
Possible causes Corrective action
Failing or blocked pressure relief
valve.
Contact your local dealer.
12.3.11 Symptom: Tank disinfection function is
NOT completed correctly (AH-error)
Possible causes Corrective action
The disinfection function was
interrupted by domestic hot water
tapping
Program the start-up of the
disinfection function when the
coming 4hours NO domestic hot
water tapping is expected.
Large domestic hot water tapping
happened recently before the
programmed start-up of the
disinfection function
When Tank > Heat up mode >
Reheat only or Schedule +
reheat is selected, it is
recommended to program the
start-up the disinfection function
at least 4hours later than the last
expected large hot water tapping.
This start-up can be set by
installer settings (disinfection
function).
When Tank > Heat up mode >
Schedule only is selected, it is
recommended to program a Eco
action 3hours before the
scheduled start-up of the
disinfection function to preheat
the tank.
The disinfection operation was
stopped manually: [C.3]
Operation > Tank was turned off
during disinfection.
Do NOT stop tank operation
during disinfection.
12.4 Solving problems based on error
codes
When a problem happens, an error code appears on the user
interface. 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 error codes and the
content of the error code as it appears on the user interface.
For a more detailed troubleshooting guideline for each error, please
see the service manual.
12.4.1 To display the help text in case of a
malfunction
In case of a malfunction, the following will appear on the home
screen depending on the severity:
▪ : Error
▪ : Malfunction
You can get a short and a long description of the malfunction as
follows:
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.
12.4.2 Error codes: Overview
Error codes of the unit
Error code Detailed error
code
Description
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 01 Entering water thermistor
abnormality of outdoor unit
81 00 Leaving water temperature
sensor problem
81 04 Leaving water temperature
sensor not properly mounted
81 06 Entering water temperature
thermistor abnormality (indoor
unit)
89 01 Heat exchanger frozen
89 02 Heat exchanger frozen
89 03 Heat exchanger frozen
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
AA 02 External backup heater
overheated
AH 00 Tank disinfection function not
completed correctly
AJ 03 Too long DHW heat-up time
required
C0 00 Flow sensor malfunction
C0 01 Flow switch malfunction
C0 02 Flow switch malfunction
C4 00 Heat exchanger temperature
sensor problem
C5 00 Heat exchanger thermistor
abnormality
CJ 02 Room temperature sensor
problem
E1 00 OU: PCB defect
E2 00 Leakage current detection error
E3 00 OU: Actuation of high pressure
switch (HPS)
E4 00 Abnormal suction pressure