21
Symptom
Cause
Rectification
"Note Regarding Check Valves"
at end of this section.
3.
Pumped flow/
pressure
is initially
adequate, but
reduces after
short time.
(a) Water supply
fault.
1. Check that hot and cold water
storage volumes are sufficient for
demand.
2.
Check that all inlet filters (pump
and tap/shower) are clean. Refer
to relevant outlet manufacturer's
installation instructions.
3. There is a blockage in the plumbing
system. Isolate the pump before
removing the blockage.
4. Pipework configuration and/or
water supply conditions are causing
air induction. Make sure plumbing
complies with recommended layout
(Fig. 2, 3 & 4).
(b) Outlet Fitting.
1. Check for blockages (tap washers,
shower hose/head, etc...).
4.
The pump
is noisy in
operation.
Note!
All pumps
generate some
noise. Installation
conditions may
allow this to be
amplified.
(a) Installation fault. 1. Vibration from the pump body
transmitted through reverberant
material. Check the pump
position and pipework fixings.
Note!
The pump should be free
standing on its rubber feet, and
not screwed down. Fit the flexible
hoses supplied.
2. Fault in the supply to the pump,
refer to
Symptom 3 (a)
.
(b) Pump internal
mechanism.
1. Pump motor fault. Contact Mira
Showers (see back cover) to
arrange service visit.
5.
The pump
switches off
while in use.
(a) Power supply
fault.
1. Check all fuses and RCD. Make
sure the power supply is available
to the pump.
(b) Water supply
fault.
1. Check the hot and cold water
storage volumes are sufficient for
the demand.
(c) Outlet Fitting.
1. Check for blockages (tap washers,
shower hose/head, etc...).
