Vaillant Flue pipe Specifications download pdf (Page 50)

50 Instructions for installation and servicing ecoTEC 839592_12

In the diagnostic mode, you can change certain

parameters or display more information.

The diagnostic information is divided into two diagnostic

levels. The second diagnostic level can be reached only

after entering a password.

Caution!

Access to the second diagnostic level must be

used exclusively by a qualified technician.

First Diagnostic level

• Press the “i” and “+” keys simultaneously.

The display shows “d.0”.

• Use the “+” or “–” keys to scroll through the desired

diagnostic numbers of the first diagnostic level (see

Table 8.2).

• Press the “i” key.

Display Meaning Display value/adjustable value

d. 0 Heating part load Adjustable heating part load in kW (factory setting: max. output)

d. 1 Water pump over run time for heating mode 2 - 60 min (factory setting: 5 min)

d. 2

Max. burner anti cycling period at 20 °C Flow

temperature

2 - 60 min (factory setting: 20 min)

d. 3

Hot water flow temperature reading (combination boiler

only)

in °C

d. 4

Current temperature for warm start sensor

(combination boilers only)

Current storage tank sensor (system boilers only)

in °C

d. 5

Flow temperature target value or return target value

when return regulation is set.

in °C, max. the value set in d.71

Limited by the eBUS controller (if an eBUS controller is connected)

d. 6 Hot water temperature target value in °C, 35 to 65 °C

d. 7

Warm start temperature target value

(ecoTEC plus combination boiler only)

Storage temperature target value (system boiler only)

in °C, 40 to 65 °C

in °C, 15 °C for left stop, then 40 to 70 °C

d. 8 External controls heat demand (Clamp 3-4)

0 = open (no heat request)

1 = closed (heat request)

d. 9

Flow target temperature from external analogue

regulator to terminal 7-8-9/eBUS

in °C, minimum from ext. eBUS target value and target value terminal

d.10 Status internal heating pump 1 = on, 0 = off

d.11 Status external heating pump 1 to 100 = on, 0 = off

d.12 Cylinder charging pump (via accessory module) 1 to 100 = on, 0 = off

d.13 Hot water circulation pump (via accessory module) 1 to 100 = on, 0 = off

d.22 Hot water demand 1 = on, 0 = off

d.23 Summer/Winter function 1 = Winter, 0 = Summer

d.25 Hot water activation via eBUS Control 1 = yes, 0 = no

d.30 Control signal for both gas valves 1 = on, 0 = off

d.33 Fan speed target value in rpm/10

d.34 Fan speed actual value in rpm/10

d.35 Position of diverter valve (combination boilers only) 0 = Heating; 100 = Hot water; 40 = Centre position

Table 8.2 Diagnostic codes of the first diagnostic level

The display shows the relevant diagnostic information.

• If necessary, use the “+” or “–” keys to change the

value (display flashes).

• Save the new value by holding down the “i” key for

approx. 5 seconds until the display no longer flashes.

You can end the diagnostic mode as follows:

• Press the “i” and “+” keys simultaneously.

• Do not press any key for approx. 4 minutes.

The current heating flow temperature appears in the

display again.

8 Troubleshooting

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Vaillant Flue pipe Specifications Page 50

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