Aqualisa iSYSTEM SMART User Manual page 15

Fluctuating water
temperature
Temperature
too low
Temperature too
low - Controller
temperature ready
display does not
stabilise
Incorrect setting
on Logic Module of
Aqualisa SmartValve
TM
Airlock in water
supplies (for gravity
fed systems only)
Hot water
temperature too high
Communications issue Check data cable connections and that there is
Combination boiler
unable to meet
demand
Low hot water
temperature
Logic Module
temperature setting
too low
Hot water supply
issue
Mixed water supplies
Unbalanced water
supplies
Combination boiler
unable to meet
demand
If hot water supply is from a combination boiler-
the Logic module mode MUST be set to COMBI.
Refer to Setting Water System Mode section
in the main product (Aqualisa SmartValve™)
installation guide.
See "Air lock" in Possible Cause section on
page 13.
Ensure hot water supply temperature is below
65ºC (minimum 55ºC for stored water and 50ºC
for combination boilers).
no visible damage.
Check if another outlet in the property is being
used at the same time.
Check that the hot water temperature is stable
at another high flowing outlet (e.g. bath hot tap
- run at maximum flow rate), additionally run a
cold outlet at 1/3 of a maximum flow rate. If the
same issue is evident on these outlets, contact
your boiler manufacturer.
Check that domestic hot water temperature is
a minimum of 55ºC for stored water and 50ºC
for combination boilers.
Maximum temperature is set to a factory
default of 45ºC. To adjust refer to the important
information section (Safety Information) and
Controller Commissioning Instructions in the
main product (Aqualisa SmartValve™) installation
guide.
Check another hot water outlet to ensure that
hot water is available.
Water supplies MUST be from the same source:
MUST NOT be gravity hot and mains cold.
For mains fed systems the cold and hot feeds
should be as evenly balanced as possible -
especially for HP unvented systems.
See same cause in 'Fluctuating Water
Temperature' symptom.
15