Troubleshooting
Symptom
Cause
Remedy
Maximum
water
temperature
too hot or
cold.
Maximum water temperature set
incorrectly.
Reset maximum water temperature.
Refer to ‘Maximum Temperature
Setting’ in Commissioning section
(page 20) and Adjusting the
Temperature in Maintenance section
(page 22).
Outlet water
temperature
too hot / cold.
Inlet filter partially blocked.
Check insert filters for any
blockages and clean as necessary.
Installation conditions outside
operating parameters.
Refer to Installation Requirements
section (pages 10-14).
Service shower valve as
recommended. Refer to
maintenance section (page 21-22).
Refer to Adjusting the Temperature
section (page 22).
Water
temperature
too cold –
maximum
water
temperature
incorrectly
set.
Hot water temperature is less
than 10ºC above the required
blend temperature.
Adjust hot water temperature or wait
for water to reheat if stored system
is used.
Instantaneous water heater not
igniting because water flow rate
is too low.
Increase water flow through the
system.
Check cartridge inlet filters and
clean or replace. Refer to
Maintenance section (pages 21-22).
Contact the boiler manufacturer.
Instantaneous water heater not
igniting because the water
pressure is too low.
Increase water pressure through
system.
Contact the boiler manufacturer.
Only hot or
cold water
from shower
valve outlet.
Inlet water supplies are reversed
(hot to cold supply).
Check the connections are the
correct way round. Hot on the left
and cold on the right when viewed
from the front. Rework pipework as
necessary.
Inlet filter is partially blocked.
Clean or replace, flush through
pipework before refitting.
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