34
MALFUNCTIONS
MALFUNCTIONS AND ERROR MESSAGES
If the controller detects a problem, the red LED flashes
and a warning symbol appears on the display. If the mal-
function resolves itself, the warning symbol becomes an
information symbol and the red LED stops flashing.
To view details of the error, press the key under the warn-
ing or information symbol.
b
End users must not attempt to resolve malfunctions
in person. Always refer malfunctions to specialist
personnel!
esc
(Flashing LED +
error message)
Possible error messages
Note for service personnel
Sensor x defective
Means that either the sensor, sensor entrance on the controller or the connecting
wire was defective (See " Temperature Resistance Table for Pt1000 Sensors " on
page 9).
Restart
Means that the controller was restarted, for example, due to a power outage.
Check date & time!
Time & Date
This display appears automatically after a longer network disruption, because the
time & date must be examined and, if applicable, adjusted.
Frequent on / off
A relay was switched on and off more than 5 times within 5 minutes.
Anti-legionella failed
Anti-legionella failed appears if at least anti-legionella Tsoll -5 °C could not be held
at the antilegionella sensor for the set exposure time.
Primary pump defect
Is displayed if flow is recognized but Tset is not reached and the flow tempera-
ture did not rise up 3 K in 3 seconds. This message may also appear if the heat
exchanger is calcified.
Anti-legionella error storage
temperature
Is displayed if temperature of storage is lower than anti-legionella Tset.
Anti-legionella residence time
Is displayed if anti-legionella Tset - 5K is not present during the hole anti legionella
residence time.
Anti-legionella error tapping
Is displayed if during anti legionella heating the measured flow is bigger than the
calibrated circulation flow.
Station of cascade added.
Shown the added station with CAN-ID.
Sensor error cascade
Is shown if one cascade station detects an sensor error.
Cascade Set point undershoot.
Is displayed if Tset for tapping is not reached after 10 seconds while the cascade
valve is open. This means a request of another station.
Summary of Contents for SC ACS 160
Page 9: ...9 ENGLISH WIRING DIAGRAM ...
Page 43: ...43 ENGLISH ...
