37
Cause Remedy
The heating system is switched off. ■ Turn on the ON/OFF switch (see dia-
grams from page 10).
■ Switch the mains isolator ON (if instal-
led).
■ Check the MCB/fuse in the power dis-
tribution board (main domestic MCB/
fuse).
Control unit incorrectly adjusted. DHW heating must be enabled.
Check the settings and correct if re-
quired:
■ Operating program (see page 28)
■ DHW temperature (see page 28)
■ Time program, DHW heating (see
page 29)
Message code 06 flashes.
The pressure in the heating system is
too low. Top up with water or notify your
local heating contractor.
Symbol is shown and message code
F02, F03, F04, F05, F07 or F08 is flash-
ing.
Simultaneously press keys MODE and
OK, until the symbol flashes (reset).
Contact your local heating contractor if
the fault reappears on the display.
What to do if...
There is no hot water
5837147
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