Heatrae Sadia Express 50 Litres, Installation, Operation And Maintenance Manual

Page: 16 / 24

16
10. Troubleshooting
10.1 Fault finding
Important
�
Servicing should only be carried out by competent
persons in the installation and maintenance of
water heating systems.
�
Any spare parts used MUST be authorised parts.
�
Disconnect the electrical supply before removing
any electrical equipment covers.
�
NEVER bypass any thermal controls.
�
The Fault Finding Chart (table 5, below) will enable
operational faults to be identified and their possible
causes rectified.
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.
Table 5: Fault finding chart
Spare Parts
A full range of spare parts are available for the
appliance range (table 6, page 20). 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.
FAULT POSSIBLE CAUSES ACTION
Water not heating Electrical supply fault. Check electrical supply.
Thermal cut-out tripped. Check cut-out, if operated reset and check
thermostat operation. If necessary replace.
Thermostat fault. Check thermostat operation, replace if necessary.
Element fault. Check element for circuit continuity and insulation
resistance. If faulty replace.
No water flow -
General
Cold water supply not turned on. Check mains water supply is on.
Blockage in cold water supply. Check for obstructions.
No water flow
- Cistern Fed
installations
Blockage in tapset. Check for obstructions.
Cistern tank empty. Check water supply to cistern tank is turned on.
Check operation of cistern float valve.
Water flows
gradually reduces
- Cistern Fed
installations
Cistern not filling as fast as outlet flow rate. Check water supply to cistern tank is turned on
and that the inlet flow rate is equal to outlet flow
rate. Check operation of cistern float valve.
Vent pipe blockage. Check vent pipe for obstructions, clear as
necessary.