13
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Troubleshooting
Installer reference guide
179
C08AF + EHYKOMB33A
Daikin Altherma R Hybrid
4P471761-1E – 2020.10
13.3.9 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 the
Domestic hot water
>
Type
>
Reheat
or
sched.
is selected, it is recommended to
program the start-up of the disinfection
function at least 4 hours later than the
last expected large hot water tapping.
This start-up can be set via the installer
settings (disinfection function).
When the
Domestic hot water
>
Type
>
Scheduled only
is selected,
it is recommended to program a
Storage eco
3 hours before the
scheduled start-up of the disinfection
function to preheat the tank.
The disinfection operation was stopped
manually: with the user interface
displaying the DHW home page and its
user permission level set to
Installer
, the button was pressed
during disinfection operation.
Do NOT press the button while the
disinfection function is active.
13.3.10 Symptom: Boiler abnormality detection (HJ-11 error)
Possible causes
Corrective action
Communication cable problem
Mount the communication cable
between the gas boiler and the indoor
unit properly.
Boiler error
Check the boiler display for error
information.
13.3.11 Symptom: Boiler/hydrobox combination abnormality (UA-52 error)
Possible causes
Corrective action
Boiler/hydrobox mismatch
Make sure that the . setting is set to 0.
Incompatibility of software
Update the boiler and hydrobox
software to the latest version.
13.3.12 Symptom: The burner does NOT ignite
Possible causes
Corrective action
Gas tap is closed.
Open the gas tap.
Air in the gas tap.
Remove air from the gas pipe.
Gas supply pressure too low.
Contact the gas supply company.