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94-RTH-BA.D/12.05 27
8.2 Thermostat Typ 4271 und 4272
Fehler: Fussboden wird nicht oder zu wenig warm
Ursache Behebung
Netzschalter nicht eingeschaltet Netzschalter in Stellung I bringen
Keine Betriebsspannung am Thermosta-
ten vorhanden
Sicherung und Verdrahtung überprüfen
Keine Betriebsspannung an der Fussbo-
denheizung/am Bodentemperiersystem
vorhanden
Sicherung und Verdrahtung überprüfen
Heizleitung hat keinen Durchgang
(Prüfung mit Ohmmeter nach Abklemmen
beider Leitungen vom Thermostaten)
Heizleitung in Ordnung stellen
Temperaturabsenkung unzeitig aktiv Zeitspanne der Temperaturabsenkung
korrekt einstellen
Uhrzeit korrekt einstellen
Temperaturfühler defekt
(beide LED blinken)
Der Temperaturfühler kann mit 33 kOhm
Widerstand simuliert werden
Temperaturfühler ersetzen
Im Thermostaten befindet sich grober
Bauschmutz
Sicherung ausschalten, Frontplatte ent-
fernen und Gerät reinigen
Thermostat defekt Thermostat ersetzen
Bei einem Defekt des Temperaturfühlers (Kurzschluss oder Bruch) geht der
Thermostat in den Fehlerbetrieb über. Dabei wird mit max. 30% der Energie ge-
heizt (Einschalten für 30% der Zeit). Dies bewirkt einen Frost- bzw. Überhit-
zungsschutz.
Bei einem Fühlerdefekt blinken beide LED.
31


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