3. Check that the controller’s extension lead is plugged into the valve and that the cable is not damaged.
4. For wall-mount Controllers only, remove the controller and check that the connector to the extension lead is fully
inserted and not damaged or wet.
5. Contact Customer Service if none of the above resolved the issue.
4b - No Flow / Low Flow:
Low flow through the product normally indicates a restriction in the system, or incorrect system pressures.
1. Check that there are no digital mixing valve errors (Diagnosis stage 1).
2. Check that the flow on the controller is not set too low. Check Max settings.
3. Check that the inlet isolators to the digital mixing valve are fully open.
4. For mains-fed (High Pressure / Combination) products, check that the incoming supply to the property is not too
restrictive. Fully open the stop cock and check that the ‘Pressure Reducing Valve’ (if fitted) is not set too low. Refer to
the 'Minimum maintained pressure’ requirement for your product.
5. Check and clean the inlet filters (refer to “Replace/Clean the Debris Filters and Check Valves Section”).
6. Check for restrictions in the showerhead / hose and clean or replace if necessary.
9. Contact Customer Service if none of the above resolved the issue.
4c - Product flowing water when switched off:
The digital mixing valve reduces the water flow slowly before final shut-off to reduce the severity of water hammer. The
time duration depends on the flow rate and system pressures. This is normal and not a product fault.
Shower fittings can continue to drain down after the digital mixing valve is shut off, especially where there are large
volumes of water present (for example, large deluge heads or long pipe runs). This process can take several hours and
may be triggered by changes in temperature or atmospheric pressure. This is normal and not a product fault. We would
therefore recommend that all water outlets are kept contained within the water catchment area.
1. Check that the issue is not a natural draining of the fittings. Remove the fittings and monitor the outlet if necessary.
2. Activate the shower a number of times at maximum flow to dislodge any debris.
3. If none of the above resolved the issue, isolate the water and power supply and contact Customer Service.
4d - Showering temperature is hotter/ colder than indicated or is fluctuating:
NOTE: The temperature displayed on the user interface is measured inside the digital mixing valve, not at the shower
outlet.
The perceived temperature of the water from your shower can vary with shower fittings and room temperature. A wider,
finer spray will cool more quickly and feel cooler than a direct spray, and long outlet pipe runs can also influence the
blend temperature, in which case you may need to adjust the showering temperature.
1. Combination Boiler fed products: Check that the hot water supply is hot enough when the shower is in use.
Combination boilers are sometimes unable to maintain temperatures at higher flows or may cut out at lower flows.
Check that no other devices are using hot water at the same time. Reduce or increase the outlet flow to around 2.2
gal/min (8 l/min) and see if that solves the issue.
2. Hot water storage tank fed products: Check that the hot water supply is not being depleted in use. Reduce the outlet
flow or reduce showering time and see if that solves the issue.
3. Check that the hot and cold supplies are connected to the correct inlets, and that the temperature and pressures are
within the product specification and are stable. Inlet water pressures must be nominally equal.
Kohler Co.
25
1430528-W2-
A
