If a replacement trap is required remove spigot bung before fitting condensate drain
connection.
Using a suitable container, flush the heat exchanger until the water appears clear in the
container.
Reassemble adapter.
11.7 Replacing electronics and display
WARNING:
Before replacing the component, comply with the safety instructions in Section 11.1.
● Comply with the assembly and installation manuals provided with the spare parts.
Replacing display or electronics
If you are replacing only one of the two components, the parameter adjustment functions
automatically. On turning on the appliance, the new component takes over the previously set
parameters from the components that are not replaced.
Replacing display and electronics
When replacing both components, after being turned on, the appliance goes to fault and
displays the error message “F70”.
● In the second diagnostic level, under the diagnostic number “d.93” enter the number of
appliance variant according to table 11.1 (see section 10.1.2).
Table 11.1 Device specific numbers
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