Ariston AQUABRAVO ITD 130, Instructions For Installation, Servicing And Use

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5.2 t
HerMAl
c
ut
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out
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s
)
5.3 i
MMersion
H
eAter
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s
)
5.4 u
nventeD
c
ontrols
5. MAINTENANCE
To ensure efficient and safe operation, and to maintain the warranty, it is
necessary to ensure the appliance is serviced annually by a competent
person.
Before servicing, preliminary electrical system checks must be carried out to
ensure electrical safety (i.e. polarity, earth continuity, resistance to earth and
short circuit).
wArninG: SWITCH OFF THE POWER SUPPLY BEFORE WORKING ON
THE APPLIANCE.
trouble-shooting:
1) The green L.E.D. is NOT on:
- Check to see that the circuits electric plug is connected (if not,
connect);
- Check to see that the P.C.B, is supplied with electricity (if not, replace
the supply cable);
- Check to see that 230 V electricity is supplied (if not, ensure that 230 V
is supplied);
- If all these checks fail to locate the problem, replace the electronic
circuit (installer).
2) The red L.E.D. is on:
- Check to see that the tank is filled with water (if not, fill it before
carrying out the following checks);
- Check to see that the clip-on circuit connector is in the proper position
(if not, position correctly);
- Check to see that the electrodes connection lead is property connected
(to check this, gently pull on it) (if not, replace the electrode);
- Check to see that the connection lead to the tank is properly connected
to the tank (if not, connect properly); .
- Check to see that the two leads from the clip-on circuit connector are
not damaged, stripped, etc. (if so, replace the electrode);
- If all these checks fail to locate the problem, replace the electronic
circuit.
n
ote
: To replace the P.C.B, there is no need to drain the cylinder;
1) Disconnect the two supply cables from the P.C.B. to the supply terminal;
2) Disconnect the clip-on circuit connector and polarising slot which
connects the circuit to the tank and the electrode;
3) Disconnect the P.C.B. from its supporting plate (plastic clips in the 4
corners) and;
4) Replace the defective circuit with a new one, then re-install in reverse
order to the above.
If the thermal cut-out has operated the cause must be found before resetting
(see section 6).
Should the immersion heater(s) become scaled, we would recommend that
the immersion heaters be replaced, a scale reducer be fitted on the cold
water supply to the cylinder and that the thermostat is set below 60
O
C to
prevent further scale formation.
Check controls as per the following:
1) Line strainer - with the water supply turned off remove screen from
strainer and clean off any debris;
2) Expansion vessel - with the water supply turned off and taps open, check
expansion vessel pressure and top up as necessary;
3) Temperature & pressure relief valve - with the water supply turned on,
check manually by lifting the test lever/turning the test knob (ensure valve
5.1 p
ro
t
ecH
A
nti
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corrosion
s
ysteM