10
Faults and malfunctions
Installation and operating instructions
50
Daikin/ROTEX A2 F
Oil condensing boiler A2 F
008.1546499_02 – 04/2018 – EN
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.
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
Chap. 6
and in the enclosed
control system instructions.
Troubleshooting
1
Detecting and remedying the cause of the malfunction.
2
Non-interlocking faults (see
Chap. 10.3
) are indicated for as long
as there is a malfunction. Once the cause has been eliminated,
the device continues to work normally.
3
Interlocking faults with fault code on the display (see
Chap.
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).
10.2
Overview of possible malfunctions
Malfunction
Possible cause
Possible solution
Heating system not
functioning (main
switch not illuminated,
no display)
No mains voltage
▪ 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!
Heating does not warm
up
Central heating standby switched off (e.g. timer is in
economy phase, outside temperature too high)
▪ Check the operating mode setting.
(9)
▪ Check the request parameter (e.g. timer program).
(9)
Heating does not warm
up enough
Heating characteristic too low
▪ Increase the parameter value.
(9)
▪ Carry out hydraulic balancing.
Hot water does not
warm up
Storage charging standby switched off (e.g. time
program is in economy phase)
▪ Check the operating mode setting.
(9)
▪ Check the request parameters.
(9)
Hot water does not
warm up enough
Storage tank charging temperature too low
▪ Increase the target hot water temperature.
(9)
Draw-off rate too high
▪ Reduce the draw-off rate, limit throughput.
Burner output too low
▪ See malfunction "Maximum burner output too low".
Maximum burner output
too low
Burner setting wrong
Wrong or soiled oil nozzle
▪ Check the burner settings and adjust if necessary (see
Chap.
7.3
).
▪ Replace the oil nozzle (see
Chap. 9.2.5
).
Air/flue gas resistance too high
▪ Check the lines for contamination.
▪ If necessary, install lines with a larger line cross-section for
the supply air or flue gas.
Oil filter soiled
▪ Replace the oil filter.
Burner does not start
Interlocking malfunction
▪ Determine and repair the cause of the malfunction.
▪ Cancel the interlock (see
Chap. 10.4
).
Burner fan not running
despite burner demand
No mains voltage on burner
▪ 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.
Plug connections on the circuit board or firing unit
are loose
▪ Check/connect the plug connections.
Heater element or thermostat for pre-heating the
heating oil defective
▪ Replace oil pre-heater.
Burner blower defective (bearing has seized)
▪ Replace the burner blower.
Oil pump has seized
▪ Replace the oil pump.
No ignition
▪ See "No ignition" fault.
Burner starting is hard
Start delay due to bad ignition
▪ Adjust ignition electrodes.
▪ Check the starting output and adjust as required.
(9)
see "RoCon BF" controller documentation
