Mira Orbis Installation And User Manual page 27

Symptom LCD
Back
Light
Low or no flow ON
rate
ON
No information ON
shown on LCD
display
Operation of ON
temperature
control has
little or no ON
effect on water
temperature. ON
OFF
No change in ON
temperature
between Low/
Medium/High ON
setting.
OFF
OFF
Water will not ON
turn off.
ON
Low Flow Heater Setting
Light
Low/Medium/
High
OFF Any
OFF Any
OFF Any
ON Medium/High
OFF Medium/High
OFF Medium/High
OFF
ON Any
OFF Any
OFF
OFF
OFF Any
ON Any
27
Probable Cause
Handset blocked.
Heater tank
excessively scaled.
Faulty Control
PCB.
Handset or inlet
filter blocked.
Thermostatic valve
faulty.
Heater tank failure.
Relay PCB failure.
Insufficient mains
water pressure.
Possible failure of
thermostatic valve
or heater tank.
Control PCB
failure.
Thermal Trip failed.
Inlet valve,
solenoid, stop
switch, relay PCB
or Control PCB
faulty.
Supply pressure
below 20 kPa
(0.2 bar).
Probable Remedy
Remove and clean.
Replace. In hard
water areas
consider the use of
a water softener.
Replace Control
PCB.
Remove and clean.
Replace.
Replace.
Replace Relay PCB
assembly.
Contact local water
company.
Check the continuity
of the heater tank
and replace parts as
necessary.
Replace Control
PCB assembly.
Replace thermal
trip or check the
continuity of the
heater tank and
replace parts as
necessary.
Replace as
necessary.
Contact local water
company. Check
mains water static
pressure.