Alpha-InnoTec Luxtronik Operating Manual page 36

No. Display
724 Tempdiff defrosting
Please call fitter
725 System error DHW
Please call fitter
726 Sensor mixing circ 1
Please call fitter
727 Brine pressure
Please call fitter
728 Sensor HS Off
Please call fitter
729 Rotating field error
Please call fitter
730 Screed heating error
Please call fitter
731 Timeout TDI
732 Cooling fault
Please call fitter
733 Anode fault
Please call fitter
734 Anode fault
Please call fitter
735 Error Ext. En
Please call fitter
736 Error solar collector
Please call fitter
737 Error solar tank
Please call fitter
738 Error mixing circle 2
Please call fitter
739 Error mixing circle 3
Please call fitter
750 Return sensor external
Please call fitter
751 Phase monitoring fault
752 Flow error
755 Lost connection to slave
Please call fitter
756 Lost connection to master
Please call fitter
757 Low-pressure fault in W/W-
appliance
758 Defrosting malfunction
759 TDI message
36
Description
Temperature spread in the heating circle is > 15 K during
defrosting (=danger of frost).
Domestic hot water faulty, desired tank temperature is fallen
below substantially.
Break or short-circuit in the mixing circle sensor.
Brine pressure pressostat has responded during the pre-rinsing
time or during operation.
Break or short-circuit in the heat source sensor at the HS outlet. Check heat source sensor, plug and
Compressor without power after switching on.
The screed heating program could not reach an FL temperature
level in the specified time interval. Screed heating program
continues running.
The temperature required for thermal disinfection could not be
reached within the set switching times.
The hot water temperature of 16 °C has been fallen short of
several times.
Fault input of the impressed current anode has responded.
Error 733 present for more than two weeks and domestic hot
water is locked.
Only possible with installed expansion board: Break or short-
circuit in the sensor "External energy source".
Only possible with installed expansion board: Break or short-
circuit in the "solar collector" sensor.
Only possible with installed expansion board: Break or short-
circuit in the "solar tank" sensor.
Only possible with installed expansion board: Break or short-
circuit in the "mixing circle 2" sensor.
Only possible with installed expansion board: Break or short-
circuit in the "mixing circle 3" sensor.
Break or short-circuit in the external return sensor.
Phase-sequence relay has responded.
Phase-sequence relay or flow switch has responded.
A slave has not responded for more than 5 minutes.
A master has not responded for more than 5 minutes.
Low-pressure pressostat in the W/W-appliance has triggered
either repeatedly or for more than 20 seconds.
Five times in a row, defrosting has either lasted longer than 10
minutes or was terminated with a feed temperature of < 10 °C.
Unable to correctly carry out thermal disinfection 5 times in
succession.
We reserve the right to make technical changes | 83055400fUK – Translation of the original instruction manual (2.1) | ait-deutschland GmbH
Remedy
Check function and location of the flow and
return sensor, HCP capacity, overflows and
heating circles.
Check circulating pump DHW, tank filling,
shutoff move and 3-way valve. Ventilate hot
water and SW.
Check mixing circle sensor, plug and
connection line.
Check brine pressure and brine pressure
pressostat.
connection line.
Check rotating field and compressor.
The screed heating program could not
reach an FL temperature level in the
specified time interval. Screed heating
program continues running.
Check mixer and heating circulation pump.
Check connection line between anode and
potentio stat. Fill SW tank.
Acknowledge error in order to release
domestic hot water preparation again.
Rectify 733.
Check sensor "External energy source", plug
and connection line.
Check "solar tank" sensor, plug and
connection line.
Check "solar tank" sensor, plug and
connection line.
Check "mixing circle 2" sensor, plug and
connection line.
Check "mixing circle 3" sensor, plug and
connection line.
Check external return sensor, plug and
connection line.
Check rotary field and phase-sequence
relay.
see errors No. 751 and No. 717.
Check network connection, switch, and IP
addresses. Perform HP search if necessary.
Check network connection, switch, and IP
addresses. Perform HP search if necessary.
If this malfunction occurs three times, the
installation can only be cleared again by
authorised service personnel!
– Check for icing-up of the evaporator.
– Check on output of the HUP at limits
specified for heating water.
– Check heating pump for leaks.
– Check switch setting for AEP.
Check setting of second heat generator and
safety temperature limiter.