10
Troubleshooting
Logano plus GB402 - Subject to technical modifications!
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10
Troubleshooting
10.1 Recognising the operating state and
resetting faults
If a fault has developed, the fault code flashes on the
control unit display. The programming unit shows faults as
plain text messages.
A fault has developed if the display flashes and indicates
something other than the current boiler water temperature
or an operating message.
Example: “6A” = the burner will not start
For an overview of the operating and fault codes, along
with possible causes and remedial measures, see the
control unit
Æ
documentation and the following
Chapter 10.2.
B
Hold down “Reset” for 5 seconds to clear the fault.
The reset is only possible if a fault message is flashing.
The display shows “rE” whilst the reset is being
implemented.
If the display then reverts to a standard operating
message, the fault has been eliminated. Should the fault
recur, repeat the reset two or three times.
Fig. 64 Clearing a fault with the “Reset” button
CAUTION:
Risk of system damage
through frost.
The heating system can freeze up if it has
been switched off through a fault
shutdown.
B
Rectify the fault immediately and restart
the heating system.
B
Where that is not possible, drain the
heating system and DHW pipework at
the lowest point.