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LMV2635.EN.202001_V2
Max. temp. condenser (when applicable)
This failure occurs when the water temperature in the flue gas condenser is too
high.
Check:
•
Condenser water flow: Check whether the circulation pump is operating
properly and whether the manual shut-off valves are closed.
•
That the condenser and the connected system do not have air in them.
•
WARNING!! Watch out for hot parts and spraying hot water in case of leaks!
Max. pressure condenser (when applicable)
The condenser is checked for contamination using a pressure switch which
measures the condenser backpressure. If the backpressure measured at the switch
is too high, the burner is locked out. The pressure switch is mounted on the flue gas
duct between the boiler and the condenser.
Possible causes:
•
Condenser is dirty.
•
Flue gas valve(s) is/are not in the correct position.
•
Condensate drain is blocked.
Check:
•
Open the inspection cover to check for contamination.
•
The position of the flue gas valves.
•
The condensate drain and syphon under the condenser.
Frequency control code F
When an internal or external frequency control error is triggered the frequency
control is switched off and the “F” symbol error code is displayed followed by a
number including a brief description.
Warning! If you contact our service department because of a failure, please write
down the error code and description. Once the cause of the failure is removed the
error can be reset by pressing the “reset/enter” button.
Under normal conditions the frequency control unit does not require maintenance
work. The frequency control unit includes a cooling fan to blow the surrounding air
over the cooling body. Take care that the air openings are not blocked. If the cooling
body becomes too hot the control will trigger an “F14” error.
Flame failure
Flame failure is the most difficult burner system error to trace. If the flame monitor
does not locate a flame, depending on the start sequence phase, a flame failure
may be triggered.
A flame failure can occur because the gas flame does not ignite. The problem can
be the electric spark does not light the pilot flame or the pilot flame doesn’t ignite the
main flame. The combustion may also be unstable causing the flame to go out
during operation.
