INS017 REV-A8.
DIAGNOSTICS
SYMPTOMS POSSIBLE CAUSE
1.1 Temperature set point incorrectly
commissioned.
1. The showering water temperature is
too hot.
1.2 Not enough cold water getting to
the valve.
1.3 Ambient cold water temperature
has increased.
2.1 Temperature set point incorrectly
commissioned.
2.2 Not enough hot water getting to
the valve.
2.3 Ambient cold water temperature
has decreased.
2. The showering water temperature is
too cold. 2.4 Operating conditions are
incorrect.
2.5 Hot water supply temperature
not hot enough.
ACTION REQUIRED
1.1.1 Please see temperature adjustment section.
1.2.1 Please see temperature adjustment section.
1.2.2 Check for blockage in supply pipes.
1.2.3 Check for blockage in check valve filters.
1.3.1 Re position the temperature control handle - see
temperature adjustment section.
2.1.1 Please see temperature adjustment section.
2.2.1 Please see temperature adjustment section.
2.2.2 Check for blockage in supply pipes .
2.2.3 Check for blockage in check valve filters.
2.3.1 Re position the temperature control handle - see
temperature adjustment section.
2.4.1. See Technical data for correct operating pressures.
2.5.1 Check that the hot water temperature at a basin tap is
acceptable, which should be around 55-60 degrees. If it
isn’t, make sure the heating appliance is adjusted to
increase the hot supply temperature.
2.5.2 Make sure the heating appliance has sufficient hot
water storage capacity.
3. Water is not mixing correctly, or
shower temperature is varying.
3.1 Hot and cold water supplies are
plumbed to the wrong side of the
valve body.
3.1.1 Remove the Valquest thermostatic cartridge, turn 180
degrees and replace.
4.1 Possible blockage in the system.
4.2 Operating conditions are
incorrect.
4.3 Valve is obstructed by debris.
4. Low or no water flow from shower
(single and multi-outlet showers).
4.4 Valve anti-scald has activated due
to operating conditions.
4.5 Water supplies have been cut off.
4.6 Shower outlet may be blocked
(handset, shower head etc).
4.7 Multiple shower outlets are not
getting enough water.
4.1.1 Check & clean any filters as necessary.
4.1.2 Supply pipework may be blocked. Consult a qualified
installer.
4.1.3 Make sure any in line service isolator valves are in the
fully open position.
4.2.1 See Technical data for correct operating pressures.
4.3.1 Clean check valves.
4.4.1 See Technical data for correct operating pressures
and inlet water supply temperatures.
4.5.1 Check other water outlets elsewhere in the house,
and contact water authority if necessary.
4.6.1 Clean the shower outlet.
4.7.1 Make sure your system is capable of delivering the
required volume of water.
4.7.2 Make sure any in line service isolator valves are in the
fully open position.
5. Leak when shower valve in “off”
position.
5.1 Check that the leak is from the
shower valve and not residual of
water in the shower head / handset.
5.1.1 Remove the shower head / handset from its’ feed to
see if any water is dripping from the flexible hose or
shower arm. If this is not leaking you are experiencing
residual water in the shower fitting which is not a fault.
5.1.2 If the leak is from the shower valve, a new flow
control cartridge is required.
6.1 Possible blockage in the system.
6. Fluctuating flow rate.
6.2 Operating conditions are
incorrect.
6.3 Dynamic inlet pressures are not
balanced.
6.1.1 Check & clean any filters as necessary.
6.1.2 Make sure any in line service isolator valves are in the
fully open position.
6.1.3 Supply pipework may be blocked. Consult a qualified
installer.
6.2.1 See Technical data for correct operating pressures.
6.3.1 Consult a qualified installer.