Vaillant ecoTEC plus, Инструкция по установке и обслуживанию

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Troubleshooting
60
Instructions for installation and servicing ecoTEC 839592_13
8
8 Troubleshooting
8.1 Logical fault finding procedure
These checks must be carried out before attempting to
use the fault finding guide.
1.
Carry out electrical safety checks (see section ‘Pre-
liminary Electrical Checks’).
2. Check that the external electricity supply to the
boiler is on, and a supply of 230 V~ is present
between boiler terminals ‘L’ and ‘N’.
3. Check that the gas supply to the boiler is on, that it has
been correctly purged and that an inlet pressure of
20 (mbar) hPa is available at the gas valve. (See sec-
tion ‘Gas Supply’).
4. Ensure the heating system is full of water and
charged to between (1 and 1.5 bar) 0.1 and 0.15 MPa.
If not, refill and vent the system. (See section ‘Fill-
ing the heating system’). Ensure boiler flow and
return service valves are open.
5. Check that the main on/off control is set to the ‘on’ posi-
tion.
6. Set the central heating temperature to maximum.
7. Set the domestic hot water temperature to maxi-
mum (combination boilers only).
8. Check that all external controls are on and calling
for heat (if no external controls are fitted, boiler
terminals 3 and 4 must be linked). Check that the
boiler anti–cycling economiser is not engaged.
8.1.1 Status codes
The status codes that you can see on the display
provides information about the current operating
condition of the appliance. The display of the status
codes can be called as follows:
plus pro
Fig. 8.1 Display of status codes
>
Press the “ i ” key.
The display shows the status code, e.g. S.4 for “Burner
mode - Heating”.
The display of the status codes can be cancelled as follows:
>
Press the “ i ” key or
>
Do not press any key for about 4 minutes.
The current heating flow temperature appears in the dis-
play again.