Status Codes; Diagnostic Codes - Vaillant ecoTEC plus 612 Instructions For Installation And Servicing

8.1.1

Status codes

The status codes that you can see on the display pro-
vides information about the current operating condition
of the appliance.
The display of the status codes can be called as follows:
plus
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 fol-
lows:
• Press the "i" key
or
• Do not press any key for about 4 minutes.
The current heating flow temperature appears in the
display again.
Display Meaning
Heating mode (all models):
S. 0 No heat demand
S. 1 Fan running
S. 2 Water pump running
S. 3 Ignition sequence
S. 4 Burner ignited
S. 5 Fan and pump running
S. 6 Fan over run
S. 7 Pump over run
S. 8 Anti cycling mode
Domestic hot water mode (ecoTEC combination boilers only):
S.10 Hot water demand
S.11 Fan running
S.13 Ignition sequence
S.14 Burner ignited
S.15 Fan and pump running
S.16 Fan over run
S.17 Pump over run
Table 8.1 Status codes
Instructions for installation and servicing ecoTEC
Supplied By www.heating spares.co Tel. 0161 620 6677
Display
Warm start (ecoTEC combination boilers only) / Charge hot
water cylinder (ecoTEC system boilers only):
S.20
S.21
S.22
S.23
S.24
pro
S.25
S.26
S.27
S.28
All boilers:
S.30
S.31
S.32
S.34
S.36
S.41
S.42
S.52
S.53
S.54
S.96
S.97
S.98
Table 8.1 Status codes (continued)

8.1.2 Diagnostic codes

In the diagnostic mode, you can change certain parame-
ters 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.
Troubleshooting 8
Meaning
Warmstart demand
Fan running
Pump running
Ignition sequence
Burner ignited
Fan and water pump running
Fan over run
Pump over run
Anti cycling mode
No heating demand from external controls (clamp 3-4
open)
Central heating thermostat knob turned off or no heat
demand by the eBUS control unit
Heat exchanger antifreeze active, as fan speed varia-
tion is too high. Appliance is within the waiting time of
the operation block function
Antifrost mode active
No heating demand from low voltage controls (clamp
7-8-9)
Water pressure > 2,9 bar
Response from accessory modul or defective conden-
sate pump is blocking burner operation
Water pressure > 2,9 bar
Appliance is within the waiting period of the operation
block function due to water shortage (VL-RL spread too
big)
Appliance is within the waiting period of the operation
block function due to water shortage (temperature
gradient)
Return-sensor check is running, demand (DHW or heat-
ing) is blocked
Water pressure sensor check is running, demand (DHW
or heating) is blocked
Flow-/Return-sensor check is running, demand (DHW or
heating) is blocked
Caution!
Access to the second diagnostic level must be
used exclusively by a qualified technician.
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