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2.8 What to do when …?
Problem Cause Action
Yellow signal lamp is illuminated
on the RWA-Emergency Power
Control System.
There are many possible causes. Evaluate the operating state and fault codes
on the 7-segment display.
Yellow signal lamp on the RWA-
Emergency Power Control
System is flashing.
Mains connection broken. Check mains connection.
Primary fuse F1 is faulty. Check fuse F1 and replace if necessary.
Depressing the ventilator switch
does not move the windows.
Mains power failure or other fault has
occurred.
Evaluate the operating state and fault codes
on the 7-segment display.
Check drives.
Rain/wind sensor active. If there is neither rain nor wind: Check the
rain/wind sensor.
7-segment display shows: a Battery fuse F3 is either missing or
blown.
Check fuse F3 and replace if necessary.
7-segment display shows:
2 Connection to battery is broken. Check battery connection.
LED alarm on the RWA switch
illuminated, although the system
is not in an alarm state.
Alarm has been reset, but there is still
an active alarm signal.
Check whether the alarm switch in the RWA
switch is released. Check the smoke sensor
and heat differential sensor, external alarm,
etc., accordingly.
7-segment display indicates fault
in an RWA switch line:
5
or
6
Line to the RWA switch is broken. Check lines.
Check the series connection of the RWA
switches.
Terminating resistors have not been
installed correctly.
Check both terminating resistors (only leave
them in the last switch of the line!).
7-segment display indicates fault
in a motor line:
7
Motor fuse is blown (green LED next to
the motor terminal strip is illuminated).
Check the fuse.
Motor line monitor fault (green LED next
to the motor terminal strip is
illuminated).
Check motor lines (motor line 3 may only be
connected to the last motor).
If there is no motor monitor, terminal 3 must
be connected to GND.
Check, which motor line has a fault.
7-segment display indicates fault
in a smoke sensor line:
4
Line to the smoke sensor is broken. Check lines.
Check that the smoke sensor is seated firmly
in the socket.
Terminating resistor missing. Check the terminating resistor (only leave one
in the last socket of the line!).
Check the resistance value.
7-segment display indicates fault
in the "External alarm" line"
u
Line is broken or has a short circuit.
Terminating resistors are missing or
placed incorrectly.
Check the circuiting and the value of the
terminating resistors.
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