6
x
Faults and malfunctions
33
BA ROTEX A1 BO - 10/2007
6.3
Overview of possible malfunctions
Tab. 6-2
Possible malfunctions on the A1 BO (Part 1)
1) see documentation "ROTEX control"
Malfunction
Possible cause
Possible solution
Heating system not
functioning (main switch
not illuminated,
no display)
No mains voltage
• Switch on boiler main switch
• Turn on main switch of heating room
• Check/switch on fuse house connection
• Check/renew fuse boiler control panel
Heating does not warm
up
Central heating standby switched off (e.g. timer is in
economy phase, outside temperature too high)
• Check operating mode setting
1)
• Check requirement parameter
1)
(e.g. timer programme)
Heating does not warm
up enough
Heating characteristic too low
• Increase parameter value
1)
Hot water does not
warm up
Storage charging standby switched off
(e.g. timer is in economy phase)
• Check operating mode setting
1)
• Check requirement parameter
1)
Hot water does not
warm up enough
Storage tank charging temperature too low
• Increase hot water target temperature
1)
Draw-off rate too high
• Reduce the draw-off rate, limit throughput
Burner output too low
• See malfunction "Burner output too low"
Burner output too low
Burner setting wrong
Oil nozzle wrong or dirty
• Rectification by the heating expert
Air/flue gas resistance too high
Oil filter dirty
Burner does not start
Interlocking malfunction
• Establish cause of malfunction and eliminate it
• Unlock by briefly pressing the Manual button
Burner motor not running
despite burner demand
No mains voltage on burner
• Insert the 7-pin plug on the motor until it engages
• Check voltage at the terminals L-N of the 7 pin plug
• Check/renew fuse.
Plug connections of the control unit are loose
• Rectification by the heating expert
Heater element or thermostat for preheating of the
heating oil defective
Burner motor defective (bearing has seized)
Condenser defective
Oil pump has seized
Burner starting is hard
Start delay due to bad ignition
• Rectification by the heating expert
Loud, whistling
mechanical noise
Oil pump is suctioning air
• Rectification by the heating expert
Vacuum in the oil line too high
Burner motor bearing defective
Oil pump defective
No ignition
Ignition electrodes short circuited
• Rectification by the heating expert
Distance of ignition electrodes too large
Ignition electrodes contaminated or humid
Ignition electrodes burnt out
Insulating body cracked
Ignition transformer defective
Ignition cable burnt
Automatic firing unit faulty
