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Appendix
Status codes – Overview
E
Status code
Meaning
Heating mode
S.00
Heating mode: No heat demand.
S.01
Heating mode: Fan start-up.
S.02
Heating mode: Pump start.
S.03
Heating mode: Burner 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: Remaining burner anti-cycling time.
S.09
Heating calibration routine/modulation cut-off time.
DHW mode
S.20
DHW demand.
S.21
DHW mode: Fan start-up.
S.22
DHW mode: Pump pre-run.
S.23
DHW mode: Burner 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.
S.29
Hot water calibration routine/modulation cut-off time.
Special cases
S.30
Room thermostat is blocking heating mode.
S.31
Summer mode activated or no heat requirement from the eBUS controller.
S.32
Waiting mode because of fan speed deviation.
S.34
Frost protection mode active.
S.35
Unit in waiting period because of fan block due to speed being too high or too low.
S.36
Controller target value constantly < 20 °C, the external controller is blocking heating mode.
S.37
Fan speed deviation in operation too high.
S.39
The burner's stop contact (e.g. safety thermostat for underfloor heating or condensate pump) has been triggered.
Operation in comfort protection mode: Unit in operation, limited heating comfort. For example, underfloor heating (con-
S.40
tact thermostat).
S.41
Water pressure > 2.8 bar.
S.42
Feedback from the flue non-return flap is blocking burner operation (only in conjunction with multi-functional module ac-
cessory) or condensate pump defective, heat requirement being blocked.
S.46
Operation in comfort protection mode, flame goes out at minimum load.
S.53
Unit in waiting period due to modulation block/operation block as a result of low water pressure (spread between flow
and return too high).
S.54
Unit in waiting period due to operation block as a result of low water pressure (temperature gradient).
S.57
Waiting mode, operation in comfort protection mode.
S.58
Burner modulation due to noise emission/wind.
S.59
Waiting period: Minimum water circulation volume not achieved.
S.61
Gas family check unsuccessful: The coding resistance on the PCB does not match the entered gas group (see also
F.92).
S.62
Gas family check unsuccessful: CO/CO₂ values at limit. Check combustion.
S.63
Gas family check unsuccessful: Combustion quality outside permissible range (see F.93). Check combustion.
S.76
System pressure too low. Top up water.
S.92
Flow rate sensor test running, heating demands are blocked.
50
Installation and maintenance instructions ecoCOMPACT 0020181421_04
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