DE DIETRICH GTU C 330 - Manual (Page 18)

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GTU C 330 24/11/08 - 300017846-001-B
8. Troubleshooting
8.2 Error messages
8.2.1 Control panel B3
In the event of a fault, the display may show the following messages:
8.2.2 Control panel K3
No error messages displayed.
See DIEMATIC-m3 control panel display.
Message Faults Probable causes Action
AL 50 Boiler sensor
The sensor circuit has been broken or
short circuited. The installation is stopped.
Advise the installer.
AL 52 Domestic hot water sensor The sensor is cut
The installation continues to operate but domestic hot
water heating is no longer covered.
Advise the installer.
AL td
Titanium anode
The titanium anode is on an open
circuit or the tank is empty.
Production of domestic hot water is stopped. This may be
reactivated for 24 hours by disconnecting and
reconnecting the power supply to the boiler.
Advise the installer.
AL tc
A short circuit has occurred on the
titanium anode or connection
reversed.