Symptom: The Pressure At The Tapping Point Is Temporarily Unusually High; 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 - Daikin EHFZ03S18DJ3V Installer's Reference Manual

14 | Troubleshooting

14.3.9 Symptom: The pressure at the tapping point is temporarily unusually high

14.3.10 Symptom: Decoration panels are pushed away due to a swollen tank

14.3.11 Symptom: Tank disinfection function is NOT completed correctly (AH-error)

14.4 Solving problems based on error codes

Installer reference guide
182
Possible causes
Failing or blocked pressure relief valve.
Possible causes
Failing or blocked pressure relief valve.
Possible causes
The disinfection function was
interrupted by domestic hot water
tapping
Large domestic hot water tapping
happened recently before the
programmed start-up of the disinfection
function
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.
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.
Corrective action
▪ Flush and clean the complete tank
including the piping between pressure
relief valve and the cold water inlet.
▪ Replace the pressure relief valve.
Corrective action
Contact your local dealer.
Corrective action
Program the start-up of the disinfection
function when the coming 4 hours NO
domestic hot water tapping is expected.
When the Domestic hot water >
Type > Reheat or Reheat + 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.
Do NOT press the button while the
disinfection function is active.
ERLA03DAV3 + EHFZ03S18DJ3V
Daikin Altherma 3 R F
4P596821-1B – 2021.10