Troubleshooting; Fault Finding - Heatrae Sadia Multipoint ECO 100L V 3kW Installation, Operation And Maintenance Manual

10. Troubleshooting

WARNING
DO NOT tamper with any of the safety valves
or controls supplied with the water heater as
this will invalidate any warranty.
Water contained in the water heater may be
very hot, especially following a thermal control
failure. Caution must be taken when drawing
water from the water heater.
Fault
Water not heating
Discharge of water from
Expansion (pressure) relief
valve
(continuously).
Discharge of water from
Expansion (pressure) relief
valve
(intermittently).
Discharge of water from
temperature/pressure relief
valve and/or water/steam from
pressure relief valve
No water flow
"Milky water"
Table 8: Fault finding chart
Spare Parts
A full range of spare parts are available for the
appliance range (table 9, page 33). Refer to the technical
data label on the appliance to identify the model installed
and ensure the correct part is ordered. You will need to
quote the serial number, which is printed on the data label.
28
Possible cause
Electrical supply fault.
Thermal cut out tripped.
Thermostat setting too low or
faulty.
Heating Element Failure.
Excessive mains water
pressure.
Expansion (pressure) relief
valve fault.
Loss of pressure from expansion
vessel.
Thermostat and thermal cut out
fault.
Product incorrectly installed.
Mains water supply not turned
on.
Blockage in mains water supply.
Oxygenated water

10.1 Fault finding

Important
Servicing should only be carried out by competent
`
persons in the installation and maintenance of
unvented water heating systems.
Any spare parts used MUST be authorised parts.
`
Isolate the electrical power supply before removing
`
any electrical equipment covers.
NEVER bypass any thermal controls or operate
`
system without the necessary safety valves.The
Fault Finding Chart (table 8, below) will enable
operational faults to be identified and their possible
causes rectified. Any work carried out on the
unvented appliance and its associated controls
MUST be carried out by a competent Installer for
unvented water heating systems. In case of doubt
contact service support (see contact details on
page 36).
Check electrical supply.
Check for error code E2. If operated then reset,
Check thermostat & replace if necessary.
Check program/setting and adjust if required.
Replace immersion heater.
Check pressure from Pressure Reducing Valve.
Replace if greater than 0.35MPa (3.5bar / 51psi)
Replace Expansion (pressure) relief valve.
Check and if necessary recharge expansion
vessel precharge pressure.
Replace iBD thermostat & thermal cut out.
Check inlet & outlet connections are correct.
Check valves are installed in accordance with
flow direction marks.
Check mains water supply is turned on.
Check mains water supply for obstructions.
Check strainer in pressure reducing valve.
Water from a pressurised system releases
oxygen bubbles when flowing. The milkiness will
disappear after a short while.
Remedy
See page 25.