Visage™ Digital Installation Guide 25
Symptom
Possible cause Action
Low / no flow
Incorrect Quartz
Smart Valve™ fitted
If water supplies are gravity fed, the PUMPED Quartz
Smart Valve™ must be used (unless a separate stand
alone pump is being utilised).
Water supply issue
For Standard Quartz Smart Valve™ - Ensure water is turned
fully on at the mains and at the servicing valve in the supply.
Ensure isolation valves are fully open.
Mixed water
supplies
For standard Quartz Smart Valve™ - Ensure hot and cold
supplies are from the mains water supply.
Check filters
Check for debris in the inlet filters of the Quartz Smart
Valve™.
IMPORTANT: Water must be isolated.
Incoming mains
water pressure or
flow too low
After confirming that the filters are clear, check with the
local water authority.
Connectors and
water supply feeds
to the Quartz
Smart Valve™ are
restrictive
Refer to IMPORTANT INFORMATION sections:
Connections and Pipe sizing.
Separate, stand
alone pump not
activating (Standard
Quartz Smart
Valve™ only)
Ensure sufficient flow to activate the flow switches of the
pump.
Quartz Smart
Valve™ pump not
activating
Refer to Setting Water System Mode section, ensure
mode is set to normal or ECO gravity setting.
Fluctuating water
temperature
Incorrect setting
on Logic Module
of Quartz Smart
Valve™
If hot water supply is from a combination boiler - the
Logic module mode MUST be set to COMBI.
Airlock in water
supplies (for gravity
fed systems only)
See “Air lock” in Possible Cause section.
Hot water
temperature too
high
Ensure hot water supply temperature is below 65ºC
(minimum 55ºC for stored water and 50ºC for
combination boilers).
Communications
issue
Check data cable connections.
Combination boiler
unable to meet
demand
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.
Temperature
too low
Low hot water
temperature
Check that domestic hot water temperature is a
minimum of 55ºC for stored water and 50ºC for
combination boilers.
Logic Module
temperature setting
too low
Refer to section: Controller Commissioning
Instructions.
Temperature too
low - Controller
temperature
ready display
does not stabilise
Mixed water
supplies
Water supplies MUST be from the same source: MUST
NOT be gravity hot and mains cold.
Unbalanced water
supplies
For mains fed systems the cold and hot feeds should be as
evenly balanced as possible - especially for HP unvented
systems.
Combination boiler
unable to meet
demand
Check 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.
