6 x Faults and malfunctions
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BA ROTEX GSU - 09/2007
6 Faults and malfunctions
6.1 Troubleshooting
The electronics of the ROTEX GasSolarUnit detects faults and indicates them:
– by a fault code in the display, for faults detected by the ROTEX THETA 23R or ROTEX ALPHA 23R.
– by the collective fault signals in the boiler control panel and through a fault code on the display, for faults detected by the
CVBC automatic firing unit, which leads to an interlocking failure.
Unlocking in the event of fault shutdown
The CVBC automatic gas firing unit starts and monitors the firing program sequence. This is followed by a fault shutdown:
– if the starting speed of the burner fan is not reached,
– if a flame signal is present during pre-ventilation,
– if no flame is produced at the start (fuel release) after 5 sec (safety period) (5 start attempts),
– if no flame is able to start or a flame failure during operation, or failed program repetition.
The fault shutdown of the burner is displayed by "E" and a fault code on the display of the boiler control panel.
Fault resolution
• Determine and rectify the cause of the malfunction (refer to Chapters 6.2 and 6.3). If the cause of the failure cannot be deter-
mined, please contact a specialised heating company.
• Unlocking the burner
Unlock the burner by pressing the on the control Fig4-1, item 13) (maximum 5 times/hr).
Unlock the burner by pressing the key on the control Fig 4-3, item 19) (maximum 5 times/hr).
If there are several fault shutdowns successively, you must check the heating system (e.g. flue system, fuel supply).
Pleasecontact a specialised heating company. Non-interlocking failures are indicated as long as the failure conditions are present.
If the cause has been eliminated the unit continues to work normally.
6.2 Malfunctions
You will find exact information regarding the control and boiler control panel as well as the mode and parameter
settings in the "ROTEX Control" documentation supplied with the corresponding control.
WARNING!
If a fault is not found and rectified properly, it can pose a risk to human life and health and adversely affect
the functioning of the gas condensing boiler.
• Work, especially on gas and flue gas-conducting components as well as on electrical systems may only
be carried out by heating engineers who have been authorised and trained by the gas or energy
supply company.
q
a
Malfunction Possible cause Possible solution
Heating system not
functioning (main switch
not illuminated, no
display)
No mains voltage
• Switch on boiler main switch
• Switch on heating room main switch
• Switch on house connection fuse
• Replace fuse on boiler control panel
Heating does not heat up Central heating stand-by switched off (e.g. timer is in
economy phase, outside temperature too high)
• Check operating setting
• Check demand parameters
Heating does not heat up
enough
Heating characteristic too low
• Raise parameter value
Hot water does not
heat up
Storage charging stand-by switched off (e.g. timer is in
economy phase)
• Check operating setting
• Check demand parameters
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