Mira Zest 7.5 Installation, Operation And Maintenance Manual page 27

Malfunction
(Continued)
Unable to select a
cool enough shower
during summer
months.
Operation of
temperature knob has
little or no effect on
water temperature.
Water still flows when
electrical supply is
isolated.
Cause
Handset sprayplate
blocked.
Other outlets being used
whilst showering, causing
water pressure to drop
below minimum required
to operate appliance.
Water pressure below
minimum required for
appliance operation.
Due to the rise in water
mains supply temperature,
the power rating may be
too high.
Handset sprayplate
blocked.
Shower has not been
turned off at appliance
control knob.
Remedy
Remove and clean (Refer to
Maintenance in the I,O& M
guide for the fittings).
Ensure other outlets e.g. bath,
washing machine or
dishwasher are not in use
whilst showering.
Ensure incoming water supply
stopcock and or appliance
isolating valve turned fully on.
If fault still persists contact
your installer.
Turn the TOP knob to the
MEDIUM position and re-
adjust temperature knob until
suitable temperature is
achieved.
Remove Handset and clean
(refer to the Maintenance in
the I,O& M guide for the
fittings). If fault still persists
contact your installer.
The shower must be turned
off at the appliance. Water
flow isolation is manually
operated not electrical.
27