8.3 FAULT FINDING
The Fault Finding chart below will enable operational
faults to be identiîżed and their possible causes rectiîżed.
Any work carried out on the Premier Plus unvented water
heater and its associated controls MUST be carried out by
a competent installer for unvented water heating systems.
In case of doubt contact the Santon Service Department
(see contact details at foot of page 16).
DO NOT TAMPER WITH ANY OF THE
SAFETY VALVES OR CONTROLS SUPPLIED
WITH THE PREMIER PLUS AS THIS WILL
INVALIDATE ANY GUARANTEE
TABLE 5 Fault Finding Chart
WARNING
F A U L T P O SSIB L E C A U S E R E M E D Y
N o ho t w at er flow 1 . M ains s u pp ly off 1. C h ec k and open s t op c o c k
2. S train er bloc k e d 2. Tu rn o ff w a te r s upply .
R em ove s traine r and c lean (s ee
S e c tion 7 .3 )
3. C o ld W ater C o m b ination
V a lve inc o rre c tly fitt ed
3. C h ec k and re fit as requ ired
W ater fro m hot taps is
c old
1. D IR E C T immers ion
he ater not s w itc hed on
1. C h ec k and s w itc h on
2. D IR E C T immers ion
he ater therm al c ut-out has
op erate d
2. C h ec k .
R e s et b y pus hing
button.
3. IN D IR E C T p ro grammer
s et t o C entral H eating only
3. C h ec k . S et to a D om es tic
H ot W ate r pro gramme
4. IN D IR E C T b oiler n ot
w ork ing
4. C h ec k boiler o pe ra tion. If fault
is s us pe c ted c on s ult bo iler
m anufac t urer's in s truc tions
5. IN D IR E C T t he rm al c ut-
ou t has operat ed
5. C h ec k . R es et by pu s hing
button on c ut -out. C h eck
op era tion o f ind ire c t therm os tat
6. IN D IR E C T m oto ris ed
valve not c onnec ted
c orre c tly
6. C h ec k w irin g and/or p lum bing
c on ne c tions to m ot oris ed valve
(s ee F ig. 7)
W ater dis c harg es 1. IN TE R M ITTE N TLY
from E x p an s ion V alve E x pa ns io n V es s e l c ha rge
pre s s u re has reduc ed b elow
3.5bar
1. S ee S e c tion 7.5 fo r re-
c ha rgin g proc edure
2. C O N TIN U A L LY
a. C o ld W ater C o m b ination
V a lve P re s s ure R educ e r no t
w ork ing c orre c tly
a. C h ec k pres s u re from C old
W ater C om bina tion V alve . If
gre at er th an 3.5bar replac e
P ressure R educ e
r c a rt ridge
b. E x pans ion V alve s ea t
da m aged .
b. R e m ove E x pan s ion V a lve
c artridge. Check c ondit ion of
s ea t. If ne c es s ary fit new
E x p ans ion V alve c artridge.
W ater dis c harg es from
T& P R e lief V alve
1. Therm al c ontrol fa ilure
N O TE w a te r will be very hot
1. S w itc h off pow e r t o
imme rs ion h ea te r(s ) a nd s h ut
do w n bo iler. D O N O T turn off
w at er s upply . W hen d isch arge
s to ps c h ec k all t he rm a l
c on trols , re plac e if faulty .
"M ilky" w ate r O x y g e
nated water W ater fro m a pressuris ed
s y s te m rele as es ox y gen
bu bb les w h en flow ing . The
m ilk iness w ill d is appea r aft er a
s ho rt w hile.
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