Fault
code
Fault description Explanations/causes
336 Sensor BX22 no function (EM1, EM2 or EM3)
339 Collector pump Q5 missing
341 Collector sensor B6 missing
342 Solar DHW sensor B31 missing
343 Solar interconnection missing
344 Solar actuator buffer K8 missing
345 Solar actuator swimming pool K18 missing
346 Solid fuel boiler pump Q10 missing
347 Solid fuel boil comp sensor missing
348 Solid fuel boiler address error
349 Storage buffer return valve Y15 missing
350 Storage buffer address error
351 Primary controller/supply pump address error
352 Low-loss header address error
353 Common flow sensor B10 missing
371 Flow temperature 3 (Heating circuit 3) monitoring
372 Temperature monitor HK3
373 Expansion module 3 fault (collective fault)
378 Repetition counter internal fault expired
382 Repetition counter fan fault expired
384 External light
385 Mains undervoltage
386 Fan speed has left valid range
387 Air pressure switch fault
426 Feedback flue damper
427 Configuration flue damper
432 Functional earth X17 not connected
(1) Switch off, start prevention, re-start after elimination of fault
(2) Check parameter in accordance with table Check the installer adjustment table and program to the basic settings or query internal LMS
SW diagnosis code and correct the corresponding parameter faults according to fault specification
(3) switch-off and locking; can only be unlocked by reset
11.2
Fault finding
11.2.1 Fault switch-off
Safety switch-off in case of flame failure during operation.
After every safety switch-off a new ignition attempt is carried out as per
program. If this does not result in flame formation a fault switch-off occurs.
In case of fault switch-off, the reset button on the control panel should be
pressed.
In case of operation disturbances (bell symbol in the display), the digit in
the display on the operating panel indicates the cause of the disturbance
(see fault code table).
Burner does not start:
No voltage at the control and regulating centre
No “burner ON” signal from the heating circuit control (see
Fault code ta
ble
)
11 Troubleshooting
136 Paramount four 30 – 115 kW 7658013 - 02 - 15092016
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