Troubleshooting; Recognising The Operating State And Resetting Faults - Buderus Logano plus GB402 Installation And Maintenance Instructions Manual

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.
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.
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 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
Logano plus GB402 - Subject to technical modifications!
10
Troubleshooting
55