Installation and maintenance instructions ecoCRAFT 0020055744_08
40
9 Troubleshooting
9.1 Status
messages
• Press the "
i
" button to read the current operating sta-
tus.
• Press the "
i
" button again to quit the display mode.
All the parameters are summarised in the following
table.
Display Status messages
Heating mode
S.00
No heat required
S.02
Water pump pre-run
S.03
Ignition
S.04
Burner mode
S.06
Fan overrun
S.07
Water pump overrun
S.08
Burner lockout after heating operation
Cylinder charging/Warm start
S.20
Water pump pre-run
S.23
Ignition
S.24
Burner mode
S.26
Fan overrun after cylinder charging
S.27
Water pump overrun
S.28
Burner lock after recharging (cycle suppression)
Special cases of status message
S.30
230V/24V room thermostat is blocking heating operation
S.31
Summer mode active or eBus controller/built-in timer is blocking heating operation
S.32
Fan speed wait time (speed deviation still too great)
S.33
Pressure cartridge wait time (pressure cartridge contact still has not closed)
S.34
Frost protection mode active
S.35
Speed ramp wait time (speed deviation during ramp-up)
S.36
Target value specification of analogue regulator < 20 °C, i.e. the external regulator is blocking the heating operation
S.39
Contact thermostat has responded
S.40
Indicate emergency operation active; Unit runs in restricted Vaillant assured comfort mode.
Corresponding error code alternates with status message in display
S.41
System pressure too high on water side
S.42
- Flue non-return valve feedback is blocking burner mode (only in connection with accessory)
- Condensate pump faulty -> demand is blocked
S.49
Siphon pressure cartridge has triggered, wait time
S.53
Appliance is within the waiting period of the operation blocking function as a result of low water pressure (flow-return differ-
ence too great)
S.57
Appliance is within the waiting period of the operation blocking function as a result of low water pressure (temperature gradi-
ent)
S.59
Minimum circulating water volume not achieved (Block temperature too high)
S.96
Return sensor test running, heating demands are blocked
S.97
Water pressure sensor test running, heating requests are blocked
S.98
Flow and return sensor test in progress, heating requests are blocked
Table 9.1 Status messages
9 Troubleshooting