
43
(LED f warning
symbol)
Z.1. Malfunctions with error messages
Malfunctions, additional info
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.
Do not try to deal with this
yourself. Consult a specialist in
the event of an error!
Possible error messages:
Notes for the specialist:
Sensor x defective
Means that either the sensor, the sensor input at the
controller or the connecting cable is/was defective.
(Resistance table see Chap. B.2)
Collector alarm
Means that the collector temperature has exceeded
the temperature set under menu 5.6
Restart
Means that the controller was restarted, for example
due to a power failure. Check the date&time!
Time & Date
This message appears automatically after a mains
failure because the time & date have to be checked,
and reset if necessary.
No flow!
This is displayed when ΔT between storage and
collector is 50 °C or higher for 5 minutes without
interruption.
Frequent on / off
A relay was switched on and off more than 5 times
within 5 minutes.
AL failed
This is displayed when AL ref -5 °C was not meas-
ured for the set Al residence time at the AL sensor.
Danger