Vaillant ecoTEC plus 618 Specifications download pdf (Page 42)

42 Instructions for installation and servicing ecoTEC

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.

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.

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 tempera-

ture

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 regula-

tor 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

d.36 Hot water flow sensor in l/min

d.40 Flow temperature Actual value in °C

d.41 Return temperature Actual value in °C

d.44 Digitised ionisation potential Display range of 0 to 102, > 80 no flame, < 40 even flame

d.47 Outside temperature

(with weather compensating Vaillant controller only)

Actual value in °C

d.67 Remaining burner anti cycling time in min

d.76 Appliance variant (device specific number) 00 to 99

d.90 Digital regulator status 1 = identified, 0 = unidentified (eBUS Address <=10)

d.91 DCF status with connected external probe with DCF77

receiver

0 = no reception, 1 = reception, 2 = synchronised, 3 = valid

d.97 Activation of the second diagnostic level Password: 17

Table 8.2 Diagnostic codes of the first diagnostic level

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 dis-

play again.

8 Troubleshooting

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Vaillant ecoTEC plus 618 Specifications Page 42

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