35
Z.1 Malfunctions with error messages
If the controller detects a malfunction, the red light flashes
and the warning symbol also appears in the display. If the
error is no longer present, the warning symbol changes to an
info symbol and the red light no longer flashes.
To obtain more detailed information on the error, press the
key under the warning or info symbol.
Possible error messages:
Sensor x defective
Time & date
Temperature < 50
Temperature > 70
Notes for the specialist:
Means that either the sensor, the sensor input at the
controller or the connecting cable is/was defective.
(Resistance table on page 5)
This display appears automatically after a mains
failure because the time&date have to be checked,
and reset if necessary.
The temperature at the optional sensor S3 fell below
50 °C.
This means that the primary temperature is too low,
so it could be possible to produce not enough hot
water
The temperature at the optional sensor S3 excee-
ded 70 °C.
This means that the primary temperature is too
high, so it is possible to have limescale in the
exchanger
(LED f
warning symbol)
Do not try to deal with this yourself.
Consult a specialist in the event of an error!
Danger
Malfunctions
