Part 4: Installation and Start-up Troubleshooting
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Troubleshooting
General
If your system malfunctions you should first check that the
controller and the control components are correctly wired.
Sensors:
The sensors can be checked in the "Gen-
eral/Service/Sensor test" level. All the sensors that are
connected must appear in this level with plausible meas-
urements.
Actuators (mixer motors, pumps):
The actuators can be checked in the "Gen-
eral/Service/Relay test" level. All relays can be individually
switched using this level. This makes it easy to check
whether these components have been correctly connected
(e.g. mixer motor direction of rotation).
BUS Connection:
In control devices with connection to
Mixer motor => Communication symbol appears in stand-
ard display ("
" or "v" depending on version)
Boiler controller => Outside temperature and boiler tem-
perature display (see "Display/Installation")
In boiler controller with connection to
Control unit => Room temperature displayed and current
room temperature setting blanked out "----"
(see "Display/heating circuit")
In mixer motor expansion controllers with connection to
Boiler controller => Display of the outside temperature and
the heat generator temperatire
(see " Display/Installation“)
Control unit => Room temperature displayed and current
room set temperature blanked out "----"
(see "Display/Heating circuit")
In case of communication problems
Check connecting cables: Bus lines and sensor lines must
be laid separately, away from mains cables! Poles switch-
es?
Check bus feed: There must be at least 8 V DC between
the "+" and "-" terminals of the BUS connector (connector
IX, terminals 3 + 4). If you measure a lower voltage, an ex-
ternal power supply must be installed.
Pumps do not switch off
Check manual / automatic switch => Automatic
Pumps do not switch on
Check operating mode => Standard
F (test B)
Check time and heating program => Heating time
Check pump switching => Type of pump switching
Standard => Outside temperature > Room temperature
setting? Heating limits => Outside temperature >
Valid heating limit?
Room control => Room temperature >
Temperature setting + 1 K.
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