Vaillant VCW 2O Instructions For Installation And Servicing page 55

Repeat the tollowing
checks:
i
A. Earth Continuity
C. Polarity.
D. Resistance to Earth
according to lnstructions
lor British Gas
Multimeter.
Does Main
Bumer light?
-
ls voltage
-
240VAClrom
ls Overheat
Cut-O'tf
Device
Switch M1 on
llow switch tested?
check that Multiplug A
connstions ile clean,
tight and corectly
oositioned.
i
NO
Go to sheet 4
Note | 2: The tunction
"summei' is only controlled by.the micro switch M1 ol the flow switch'
During domestic hot t"t"iiiii'JtioiiinJi6itlct
iug must operate the micro switch
Ml (close).
lfthe micro switch is not operated by the contact lug' an
adiustment is necessary'
For this Durpose, open the warm water tap (apglign-ce^9.t1!ot
oDeration - switch otf
main switch). ]lghten tnJiiri oi tne'iwititr'roit (top ol flow
sivitch) bv means of a
LgftT#';lT'lJ$s'#"HlFr'IH!."*
frg:::Jlli:"":HL"
)li,j"i not iouin tn" casing of the micro switch'
Note 13: See tigure 99 for micro switch Ml'
55