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29
ENGLISH
MALFUNCTIONS
MALFUNCTIONS WITH ERROR MESSAGES
The controller indicates a problem by causing the LED
to blink red and generating a relative error symbol in the
display. If the error is only transient, the error symbol will
be replaced by an information symbol and the blinking
red light disappears.
To find out more about an error, press the key located be-
low the error or information symbol.
b
Do not attempt to solve the problem without assis-
tance. Always call an expert service technician.
esc
Flashing LED +
warning symbol
Possible error messages
Notes for service technicians
Sensor x defective
Fault affecting the sensor, the sensor input at the controller, or the cable connecting
the sensor.
Collector alarm
This alarm will trip when the collector temperature limit set by way of the menu "5.6.
Collector alarm" is exceeded.
Restart
This indicates that the controller has rebooted, e.g. following an electrical power
failure. Check the date and time
Time & date
This screen appears automatically following an electrical power failure, since the
time and date must be verified, and if necessary reset.
Night-time circulation
Check clock
This indicates that the pump is or was in operation between 23:00 and 04:00.
System protection
The collector temperature setting was exceeded at some point, triggering deactiva-
tion of the solar pump to prevent damage to the system through overheating.
Collector protection
The collector temperature setting was exceeded at some point, triggering activation
of the solar pump to cool the collector circuit with the aid of the heat exchanger.
Recooling
Excess heat was or is being radiated from the collector to protect the system.
Frost protection
The solar pump was switched on to prevent frost damage to the collector
Frequent On / Off
When the solar pump is switched on and off more than 5 times in 5 minutes (i.e. 11
contact changes), this message is displayed.
No flow
Message displayed when the solar pump is running with ΔT >= 50 °C for at least 5
minutes.
Pressure: failure
Displayed when pressure monitoring is activated and the Pmin or Pmax limit is
exceeded.
SD-card error
This message is displayed when an SD card has been detected, but the controller
is unable to read from or write to the card.
Содержание SC SUN 300
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