6
x
Faults and malfunctions
32
BA ROTEX A1 BO - 10/2007
6
Faults and malfunctions
6.1
Troubleshooting
The electronic system in the oil condensing boiler detects faults and displays them:
– Through a fault code in the display, for faults detected by the boiler control.
– Through the burner malfunction indicator on the boiler control panel and through a fault code on the display, for faults
detected by the DKO automatic firing unit which lead to an interlocking malfunction.
– Through the STL indicator in the boiler control panel for a boiler overheating detected by the safety temperature limiter (STL)
that leads to an interlocking malfunction.
Troubleshooting
• Detecting and remedying the cause of the malfunction.
• Interlocking fault with fault code in the display: Unlock by briefly pressing the Manual button
(Reset button
) on the
boiler control panel (see chapter 6.2).
• STL malfunction: By unlocking the STL switch (see chapter 6.4).
• If a fault shutdown occurs repeatedly, the heating system must be checked (e.g. flue system, fuel supply). Please consult
a heating expert in this case.
• Non-interlocking malfunctions are indicated as long as there is a malfunction. Once the cause has been eliminated, the unit
continues to work normally.
6.2
Burner malfunctions
The LED in the reset button of the automatic firing units (fig. 2-4, pos. 9) indicates the processes of the burner control. In
normal
operating mode
the LED sends a short flashing signal followed by an extended pause.
LED display in the event of a
malfunction
:
– LED burns steadily, the burner is shut off and locked.
– The continuous lighting is interrupted every 10 seconds and a flash code is broadcast which gives information about the
cause of the last fault.
Tab. 6-1
Fault codes of the automatic firing units
l
Short signal
l
Long signal
—
Pause
Unlocking the automatic firing unit:
Requirements: The cause of the malfunction is rectified, the burner is electrically connected.
• Turn on A1 BO.
•
Reset by briefly pressing the Manual button on the boiler control (fig. 4-1, pos. 13).
•
Reset by briefly pressing the Reset button on the boiler control (fig. 4-3, pos. 29).
WARNING!
Improper faultfinding and rectification can be a health and safety risk endangering human life and adversely
affect the operation of the oil condensing boiler.
• The faults should only be rectified only by authorised and trained heating experts.
Detailed information for the control, the operating mode and parameter setting and concerning the error codes
can be taken from the "ROTEX Control", which is included in the scope of supply of the associated control.
q
a
Flash Code
Cause of the fault
l
l l l l
No flame signal within safety period
l l
l l l
External light during pre-ventilation time/pre-ignition time
l l l
l l
Contact release thermostat does not close within 400 s
l l
l l l
—
l l l l l
Manual fault shutdown
q
a
