Ariston STI 300 Handbuch für Installation und Gebrauch - Seite 18

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4.

MAINTENANCE

4.1
P
T
RO
ECH
A
-
NTI
CORROSION
4.2
T
C
-
HERMAL
UT
4.3
I
H
MMERSION
EATER
4.4
U
C
NVENTED
ONTROLS
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18
To ensure efficient safe operation, it is recommended that the appliance is
serviced annually by a competent person.
After 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.
S
YSTEM
Trouble-shooting:
1) The green L.E.D. is NOT on:
- Check to see that the circuits electric plug is connected (if not,
- Check to see that the P.C.B, is supplied with electricity (if not, replace
- Check to see that 230 V electricity is supplied (if not, ensure that 230 V
- If all these checks fail to locate the problem, replace the electronic
2) The red L.E.D. is on:
- Check to see that the tank is filled with water (if not, fill it before
- Check to see that the clip-on circuit connector is in the proper position
- Check to see that the electrodes connection lead is property connected
- Check to see that the connection lead to the tank is properly connected
- Check to see that the two leads from the clip-on circuit connector are
- If all these checks fail to locate the problem, replace the electronic
N
OTE
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
(
)
OUT
S
(see section 5).
(
)
Should the immersion heater(s) become scaled, we would recommend that
S
the immersion heaters be replaced, also ensure that the thermostat is set
below 60
Check controls as per the following:
1) Line strainer - with the water supply turned off remove screen from
strainer and clean of any detritus;
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
closes after testing);
connect);
the supply cable);
is supplied);
circuit (installer).
carrying out the following checks);
(if not, position correctly);
(to check this, gently pull on it) (if not, replace the electrode);
to the tank (if not, connect properly); .
not damaged, stripped, etc. (if so, replace the electrode);
circuit.
: To replace the P.C.B, there is no need to drain the cylinder;
O
C to prevent further scale formation.