Troubleshooting; Contact Vaillant Service Solutions (0870 6060 777); Performing Diagnostics; Calling Up Live Monitor (Status Codes) - Vaillant ecoTEC VU Installation And Maintenance Instructions Manual

13

Troubleshooting

13 Troubleshooting
13.1 Contact Vaillant Service Solutions
(0870 6060 777)
> If you contact Vaillant Service Solutions (0870 6060
777) or your Vaillant service partner, if possible, please
mention
– the fault code displayed (F.xx),
– the boiler status that is displayed (S.xx) in the "Live
monitor" (¬ section 13.2.1).
13.2

Performing diagnostics

13.2.1 Calling up Live Monitor (status codes)

You can call up the boiler status codes in the display which
provide information on the current operating status of the
boiler.
> Press the left-hand
buttons ("i") at the same time
S.04
13.1 Status code display view
13.2.2 Status codes – Overview
Display Meaning
Heating mode
S.00 Heating, no heat demand
S.01 Heating mode fan start-up
S.02 Heating mode pump flow
S.03 Heating mode, ignition
S.04 Heating mode, burner on
S.05 Heating mode, pump/fan overrun
S.06 Heating mode, fan overrun
S.07 Heating mode, pump overrun
S.08 Heating mode, burner anti-cycling time
13.1 Status codes
60
and right-hand selection
13.2.3 Status codes – Overview
Display Meaning
DHW mode (VUW boiler)
S.10 Hot water demand via impeller sensor
S.11 DHW mode, fan start-up
S.13 DHW mode, ignition
S.14 DHW mode, burner on
S.15 DHW mode, pump/fan overrun
S.16 DHW mode, fan overrun
S.17 DHW mode, pump overrun
DHW mode, (VU boiler with cylinder or VUW comfort mode warm
start)
S.20 DHW demand
S.21 DHW mode, fan start-up
S.22 DHW mode, pump running
S.23 DHW mode, ignition
S.24 DHW mode, burner on
S.25 DHW mode, pump/fan overrun
S.26 DHW mode, fan overrun
S.27 DHW mode, pump overrun
S.28 Hot water burner anti-cycling time
Special cases
S.30 Room thermostat (RT) is blocking heating mode
S.31 Summer mode active or no heat requirement from eBUS
controller
S.32 Waiting period because of fan speed deviation
S.34 Frost protection mode active
S.39 "Burner off contact" has triggered (e.g. contact thermo-
stat or condensate pump)
S.40 Comfort safety mode is active: Boiler is running with lim-
ited heating comfort (¬ section 13.2.4)
S.41 Water pressure > 2.8 bar
S.42 Flue non-return flap return signal blocks burner opera-
tion (only in connection with VR40 accessory) or con-
densate pump faulty, heat requirement is blocked
S.46 Comfort safety mode, flame loss at minimum load
S.53 Boiler is in waiting period of modulation block/operation
block function due to water shortage (supply-return
spread too large)
S.54 Boiler is in waiting period of operation blocking function
as a result of water shortage (temperature gradient)
S.76 System pressure too low; top up water
S.96 Return temperature sensor test running, heating
demands are blocked
S.97 Water pressure sensor test running, heating demands
are blocked
S.98 Flow/return temperature sensor test running, heating
demands are blocked
13.1 Status codes (continuation)
Installation and maintenance instructions ecoTEC 0020173113_01