10
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Faults and malfunctions
ROTEX GCU compact -
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10 Faults and malfunctions
10.1 Troubleshooting
The electronics of the ROTEX GCU compact
–
signals a fault by red backlighting in the display and
–
shows a fault code in the display.
An integrated fault memory stores up to 15 fault messages that
have occurred most recently.
Depending on the operating mode, the fault messages are also
forwarded to connected room stations or room thermostats.
Troubleshooting
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Detecting and remedying the cause of the malfunction.
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Non-interlocking malfunctions (see section 10.3) are
indicated as long as there is a malfunction. Once the cause
has been eliminated, the unit continues to work normally.
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Interlocking faults with fault code in the display (see
section 10.4).
Ɣ
By pushing the Exit button under the display for at least 5
secs you can call up the "Special Level" and cancel the
interlock (menu-directed).
10.2 Overview of possible malfunctions
You will find detailed information on the control unit and
the boiler control panel as well as on the operating
modes and parameter settings in chapter 6 "Control
unit" and in the documentation "ROTEX RoCon BF
Controller" as supplied with the associated Control unit.
Malfunction
Possible cause
Possible solution
Heating system not
functioning (main
switch not illuminated,
no display)
No mains voltage
Ɣ
Switch on the main switch for the boiler.
Ɣ
Turn on main switch of heating room
Ɣ
Check / switch on fuse house connection
Ɣ
Check/ renew fuse boiler control panel
Only use the 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)
Ɣ
Check operating mode setting.
1)
Ɣ
Check requirement parameter
1)
(e.g. timer
programme)
Heating does not
warm up enough
Heating characteristic too low
Ɣ
Increase parameter value.
1)
Ɣ
Carry out an hydraulic balancing.
Hot water does not
warm up
Storage charging standby switched off
(e. g. timer is in economy phase)
Ɣ
Check operating mode setting.
1)
Ɣ
Check demand parameters.
1)
Hot water does not
warm up enough
Storage tank charging temperature too low
Ɣ
Increase hot water set temperature.
1)
Draw-off rate too high
Ɣ
Reduce the draw-off rate, limit throughput.
Burner output too low
Ɣ
See malfunction "Maximum burner output too low"
Maximum burner out-
put too low
Burner setting wrong
Ɣ
Check the burner settings and adjust as required
(see chapter 7.3).
Ɣ
Replace the safety gas control block.
Air/flue gas resistance too high
Ɣ
Check the lines for contaminations.
Ɣ
If necessary, install lines with a larger line cross-
section for supply air or flue gas.
Burner does not start Interlocking malfunction
Ɣ
Determine and repair the cause for the malfunction.
Ɣ
Cancel interlock (see section 10.4).
Burner blocking contact closed
Ɣ
Burner blocking contact was closed by an external
source (e.g. solar system) - not a fault.
