en
26
Installation
Displa
ys,
functions and options
Messages
Commissioning
Operation and function
Operating control LED is permanently red.
Is the message !VBus Sensor unit indicated in the Status/Messages menu?
yes
The error LED of the measuring unit is flashing red?
The operating LED of the
measuring unit is flashing red?
no
Check the VBus
®
cable
from the controller to
the measuring unit /
establish the connection.
yes
no
yes
o.k.
Check / establish power supply of the measuring unit.
The display is permanently off.
Heating power too low or no heating power available.
Press any button. Display illuminated?
Controller has been in
standby, everything OK
Is the store maximum temperature
exceeded?
Is a fan speed < 2800 indicated in the
Controller status menu?
Is Power red. indicated in the status
menu?
A temperature threshold has been
exceeded in the controller / cooling ele-
ment. As soon as the device has cooled
down, it will heat with the heating
power available.
A temperature threshold has been exceeded
in the controller / cooling element. As soon as
the device has cooled down, it will heat with
the heating power available.
Check / clean
fan.
The 16 A fuse of the power supply (right) is defective.
The fuse holder (which holds the spare fuse) becomes
accessible when the cover is removed.The fuse can
then be replaced.
Establish the power
supply.
Check the power supply of the controller. Is it
disconnected?
yes
no
no
yes
Status display Excess fluctuates quickly between positive and negative values.
The 16 A fuse of the power stage (left) is defective. The fuse holder (which holds
the spare fuse) becomes accessible when the cover is removed.The fuse can then be
replaced.
Is Max. temp. indicated in the status menu?
no
yes
yes
no
no
yes