Vaillant ecoMAX pro SERIES Manuel de service télécharger pdf (Page 29)

Instructions for Use, Installation and Servicing ecoMAX pro 29

16 Combustion analysis 17 Fault finding

Again in screen ‘8’, Set the appliance fan speed/burner to

minimum by pressing the ‘-‘ key until ‘1’ (burner to Pmin)

is shown on the right hand side of the screen. Press the

‘mode’ button again.

* ecoMAX pro 28E only - for LPG see page 23

Fig 14.5

12706

Check the CO

value, which should be 8.8 % ± 0.2 %. If

adjustment proves necessary then proceed as follows.

Adjustment of the CO

at minimum rate is very

coarse, so carefully adjust the CO

with the (‘B’) offset

adjustment using a 2mm allen key to 8.8 %, (rotate

clockwise to increase).

After checking the combustion, press and hold the ‘mode’

button for 10 seconds to return to the normal mode,

showing the current flow temperature. Replace the cap

on the sampling point and refit the outer front case.

NOTE:

Depending on the time to take the readings, the

display may default back to the normal mode, it

may be necessary to repeat steps 3,4 and 5 to

adjust the appliance fan speed/burner.

18E 28E *

Output Min Max Min Max

Burner % CO

Case on (± 0.2) 9.0 9.0 9.0 9.0

Case off (± 0.2) 8.8 8.8 8.8 8.8

Approx. gas rate

(after 10 mins 0.53 2.00 0.56 3.02

from cold) m

Fault Finding

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

‘preliminary electrical checks’ 13.1).

2. Check that the external electricity supply to the boiler is

on, and a supply of 230V is present at the boiler

terminal strip.

3. Check that the gas supply to the boiler is on, that it

has been correctly purged and that an inlet pressure of

20mbar is available at the gas valve (see section ‘gas

supply’ 13.3).

4. Check that the main on/off control is set to the ‘on’

position.

5. Set the central heating temperature to maximum.

6. Check that all external controls are on and calling for

heat.

7. Check that all manual circuit controls ie. bypass,

radiator valves are correctly adjusted.

17.1 Status Mode

A series of status mode screens are available for current

boiler operating information.

To display the status mode, proceed as follows:

• With the interface in ‘normal’ mode, press and hold the

‘mode’ button (

) for 10 seconds until a flashing ‘0’

appears (fig. 17.1).

• Press the ‘-‘ key and scroll through until ‘96’ (installer

mode) is shown on the screen, then press the ‘mode’

button again.

• A series of screens are then available for service

functions. An example is shown in fig. 17.2 (screen 23

‘product code’ for the ecoMAX pro 18E).

Fig 17.1

12713

Fig 17.1

12714

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Vaillant ecoMAX pro SERIES Manuel de service Page 29

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