20
FAULT DIAGNOSIS
Symptom
Cause
Rectification
1.
Pump does not
start.
(a) No power supply. 1. Check all fuses and RCD. Make
sure power supply is available at
the double pole isolator switch. If
fuse "blows" repeatedly, contact
Mira Customer Service Dept.
Details on the back cover of this
guide.
(b) No/low flow
through outlet
(tap/shower)
1. Clean the shower head and make
sure the flow controls are operating
correctly.
2. Check and clean the inlet filters
(pump and tap/shower). Refer to
outlet manufacturer's installation
instructions.
3. Check the system for air locks and
recommission the pump, refer to
section
"Commissioning"
.
4. Check the isolating valves are fully
open and other restrictions.
5. Check the system has adequate
flow rate for the pump to operate,
refer to section
"Installation"
.
6. The flow switch mechanism is
sticking. Contact Mira Showers (see
back cover) to arrange service visit.
(c) Internal problem. 1. Contact
Mira Customer Service
Dept.
Details on the back cover of
this guide.
The pump has
started but
stopped within a
short period.
(d) Motor thermal
switch tripped.
1. Allow the motor to cool, up to 1 hour,
refer to symptom 5 (c).
2.
The pump
operates
momentarily
when not
required.
(a) Flow-switch
operating due to
water movement
in pipework.
1. Air pocket after pump. Make
sure plumbing complies with
recommended layout (Fig. 2, 3 & 4).
2. Air pocket in the pump supply (hot)
expanding due to system heating.
Correct the pipework layout to
eliminate thermal expansion, fit a
single check valve close to and
AFTER PUMP OUTLET
, refer to
