Fault Finding - Heatrae Sadia Multipoint SS V 50 Fitting Instructions And User Manual

8.0 FAULT FINDING

WARNING: DISCONNECT FROM ALL ELECTRICAL SUPPLIES BEFORE
BEGINNING ANY WORK ON THE MULTIPOINT SS. FLUID CONTAINED
IN THE CYLINDER MAY BE VERY HOT!
The Multipoint SS should give trouble free operation, however should a
problem occur, the table below should enable most faults to be identified
with ease.
Fault Finding should be carried out by a competent person and any replacement
parts used should be authorised Heatrae Sadia Multipoint SS spare parts.
TABLE 04: Fault finding table
FAULT
Water not heating
Discharge of water from pres-
sure relief valve
(continuously).
Discharge of water from pres-
sure relief valve
(intermittently).
Discharge of water from
temperature/pressure relief
valve and/or water/steam from
pressure relief valve
No water flow
"Milky water"
20
POSSIBLE CAUSE
Electrical supply fault.
Thermal cut out tripped.
Thermostat setting to low
or faulty.
Excessive mains water
pressure.
Expansion 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
REMEDY
Check electrical supply. Check cut out. If
operated then reset. Check thermostat &
replace if necessary.
Check and adjust setting if required. Re-
place if necessary.
Check pressure from pressure reducing
valve. Replace if greater than 3.5bar (51psi)
Replace expansion relief valve.
Check and if necessary recharge expan-
sion vessel precharge pressure.
Replace combined thermostat & thermal
cut out.
Check inlet & outlet connections are cor-
rect. Check valves are installed in accord-
ance with flow direction marks.
Check mains water supply is turned on.
Check mains water supply for obstructions.
Check expansion relief valve.
Check strainer in pressure reducing valve.
Water from a pressurised system releases
oxygen bubbles when flowing. The milki-
ness will disappear after a short while.