63
ELECTRONIC CONTROL UNIT
Chapter 9
Layouts and systems indicator
layouts and systems indicator only
The layouts and systems indicator (systems active layout)
indicates the layout selected by means of SIST channel. It is
composed of diff erent system component symbols that fl ash,
appear permanently or disappear according tot the current
status of the system.
probes
collector 2
upper tank probe
central heating circuit
valve
probe
symbol
additional. burner
functioning
tank 2 or additional heating (with
additional symbol)
tank
tank heat exchanger
pumps
valve
collector 2
Collectors
with collector probe
Temperature probes
Tanks 1 and 2
with heat exchanger
Central heating circuit
3-way valve
Only the actual direction of
the current or the current
operational mode are
indicated.
Pump
Additional heating
with burner symbol
Flashing codes
System layouts fl ashing codes
the pumps fl ash during the initialisation phase
the probes fl ash when the display channel is selected of the respective probe
the probes fl ash quickly if the probe is faulty
The burner symbol fl ashes when the additional heating is inserted
fi gure 9.13
fi gure 9.14