Appendix
28 Installation and maintenance instructions SUSTAIN ..r 0020200958_00
Setting level Values
Unit Increment, select, explanation
Default set-
ting
Own setting
Min. Max.
d.95 Software versions – – – 1 = Main PCB
2 = Interface PCB
– Adjustable
d.96 Reset to factory setting – – – 0 = No
1 = Yes
– Adjustable
d.128 Heating minimum target
value
10 75 ℃ 1 10 Adjustable
d.129 Hot water minimum tar-
get value
35
(com-
bina-
tion
unit)
45
(pure
boiler)
60 ℃ 1 35 Adjustable
D Status codes – Overview
Status code Meaning
Displays in heating mode
S. 0 Heating mode: No requirement
S.01 Heating mode: Advance fan operation
S.02 Heating mode: Pump pre-run
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: Temporary shutdown after heating procedure
Display in hot water handling mode with cylinder
S.20 Hot water handling mode: Requirement
S.21 Hot water handling mode: Advance fan operation
S.22 Hot water handling mode: Pump pre-run
S.23 Hot water handling 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 handling mode: Temporary shutdown of the burner
Other displays
S.30 Room thermostat is blocking heating mode.
S.31 No heating demand: Summer mode, eBUS controller, waiting period
S.32 Fan waiting time: Fan speed outside of the tolerance values
S.34 Frost protection active
S.39 Underfloor heating contact open
S.42 Flue non-return flap closed
S.46 Frost protection mode (Comfort): Minimum load
S.53 Product in waiting period/operation block function due to low water pressure (flow/return spread too large)
S.54 Waiting period: Low water pressure in the circuit (flow/return spread too large)
S.88 Product purging active
S.91 Maintenance: Demo mode
S.96 Automatic test programme: Return temperature sensor, heating demands blocked.
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