Part 4:Appendix
Troubleshooting
63
Troubleshooting
General
If your system malfunctions you should first check that the
controller and the control components are correctly wired.
Sensors:
All sensors can be checked in the "General/Service/Sensor
test" level. All the sensors that are connected must appear
in this level with plausible measurements.
Actuators (Mixer motor, pumps=>only with code no.):
All actuators can be checked in the "General/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
standard display (" " or "
v
" depending on version)
Boiler controller => Outside temperature and boiler
temperature 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 => Outside temperature and boiler
temperature display (see "Display/Installation")
Control unit => Room temperature displayed and current
room temperature setting 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
switches?
Check bus feed: There must be at least 8V DC between
the "+" and "-" terminals of the BUS connector (connector
IX, terminals 3+4). If you measure a lower voltage, an
external power supply must be installed.
Pumps do not switch off
Check manual / automatic switch => Check automatic
pump switching
=> pump switching mode
Pumps do not switch on
Check operating mode => Standard
F
(test
B
)
Check time and heating program => Heating time
Check pump switching mode:
Default => Outside temperature > Room set temperature?
Heating limits => Outside temperature > Valid heating limit?
Room control => Room temperature > Temperature s 1K
