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10
Faults and malfunctions
10
Faults and malfunctions
10.1
Troubleshooting
The electronics of the A2 F
▪ signal a fault by red backlighting on the display, and
▪ show a fault code on the display.
An integrated fault memory stores up to 15 fault messages that have
occurred most recently.
Depending on the operating mode, messages are also forwarded to
connected room controllers or room thermostats.
10.2
Overview of possible malfunctions
Malfunction
Heating system not
No mains voltage
functioning (main
switch not illuminated,
no display)
Heating does not warm
Central heating standby switched off (e.g. timer is in
up
economy phase, outside temperature too high)
Heating does not warm
Heating characteristic too low
up enough
Hot water does not
Storage charging standby switched off (e.g. time
warm up
program is in economy phase)
Hot water does not
Storage tank charging temperature too low
warm up enough
Draw-off rate too high
Burner output too low
Maximum burner output
Burner setting wrong
too low
Wrong or soiled oil nozzle
Air/flue gas resistance too high
Oil filter soiled
Burner does not start
Interlocking malfunction
Burner fan not running
No mains voltage on burner
despite burner demand
Plug connections on the circuit board or firing unit
are loose
Heater element or thermostat for pre-heating the
heating oil defective
Burner blower defective (bearing has seized)
Oil pump has seized
No ignition
Burner starting is hard
Start delay due to bad ignition
(9)
see "RoCon BF" controller documentation
Installation and operating instructions
50
Troubleshooting
1
2
3
Possible cause
INFORMATION
Detailed information on the control system and the boiler
control panel as well as on the operating modes and para-
meter settings can be found in
control system instructions.
Detecting and remedying the cause of the malfunction.
Non-interlocking faults (see
Chap.
as there is a malfunction. Once the cause has been eliminated,
the device continues to work normally.
Interlocking faults with fault code on the display
10.4).
▪ Pushing the Exit button under the display for at least 5 s dis-
plays the "Special Level" and cancels the interlock (menu-
guided).
Possible solution
▪ Switch on the main switch for the boiler.
▪ Turn on the main switch of the heating room.
▪ Check/switch on the fuse house connection.
▪ Check/renew the boiler control panel fuse. Only use same
type of fuses!
▪ Check the operating mode setting.
▪ Check the request parameter (e.g. timer program).
▪ Increase the parameter value.
▪ Carry out hydraulic balancing.
▪ Check the operating mode setting.
▪ Check the request parameters.
▪ Increase the target hot water temperature.
▪ Reduce the draw-off rate, limit throughput.
▪ See malfunction "Maximum burner output too low".
▪ Check the burner settings and adjust if necessary
7.3).
▪ Replace the oil nozzle (see
Chap.
▪ Check the lines for contamination.
▪ If necessary, install lines with a larger line cross-section for
the supply air or flue gas.
▪ Replace the oil filter.
▪ Determine and repair the cause of the malfunction.
▪ Cancel the interlock
(see Chap.
▪ Insert X1 connector on firing unit until it clicks into place.
▪ Check the voltage on the L-N terminals of the X1 connector.
▪ Check/renew the fuse.
▪ Check/connect the plug connections.
▪ Replace oil pre-heater.
▪ Replace the burner blower.
▪ Replace the oil pump.
▪ See "No ignition" fault.
▪ Adjust ignition electrodes.
▪ Check the starting output and adjust as required.
Chap. 6
and in the enclosed
10.3) are indicated for as long
(see Chap.
9
9
9
9
9
9
(see Chap.
9.2.5).
10.4).
Daikin/ROTEX A2 F
Oil condensing boiler A2 F
008.1546499_01 – 03/2018 – EN
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