Ariston Unvented Hot Water Storage Cylinders manual Maintenance, Trouble-shooting

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4.MAINTENANCE

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).

4.1PROTECH

ANTI-CORROSION SYSTEM

4.2THERMAL CUT-OUT(S)

4.3IMMERSION HEATER(S)

4.4UNVENTED CONTROLS

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.

NOTE: 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 5).

Should the immersion heater(s) become scaled, we would recommend that the immersion heaters be replaced, also ensure that the thermostat is set below 60OC 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 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,

www.tradeplumbing.cochec.ukk manCallually by Saleslifting the testOnlever/turning08708034288the test knob (ensure valve closes after testing);

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