Faults
Code Cause
of the
error
Description
Checking / solution
5 RESET:ON/OFF
D32
SCU
5 resets done in less than an hour
4
Switch the boiler off and switch back on
TA-S SHORT-CIR
D37
SCU
The Titan Active System® is short-circuited
4
Check that the connection cable between the SCU PCB and the anode is not short-
circuited
4
Check that the anode is not short-circuited
Remarks:
Domestic hot water production has stopped but can nonetheless be restarted using key
r
.
The tank is no longer protected.
If: A tank without Titan Active System® is connected to the boiler: Check that the Titan
Active System® simulation connector (delivered with package AD212) is fitted to the
sensor card.
TA-S DISCONNEC
D38
SCU
The Titan Active System® is on an open circuit
4
Check that the connection cable between the SCU PCB and the anode is not severed
4
Check that the anode is not broken
Remarks:
Domestic hot water production has stopped but can nonetheless be restarted using key
r
.
The tank is no longer protected.
If: A tank without Titan Active System® is connected to the boiler: Check that the Titan
Active System® simulation connector (delivered with package AD212) is fitted to the
sensor card.
8.3.1.
Deletion of sensors from the memory in the
PCB
The configuration of the sensors is memorised by the SCU PCB. If a
sensor error appears whilst the corresponding sensor is not
connected or has been voluntarily removed, please delete the sensor
from the memory in the SCU PCB.
4
Press key
?
repeatedly until
"Do you want to delete this
sensor?"
is displayed.
4
Select
YES
by turning the rotary button and press to confirm.
8.3.2.
Deleting the IOBL 3WV modules from the
memory in the PCB
The configuration of the IOBL 3WV modules is memorised by the
SCU PCB. If a
IOBL.3WV B DEF
or
IOBL.3WV C DEF
error appears
after voluntary deletion of a 3WV module, please delete the module
from the memory in the SCU PCB.
4
Press key
?
repeatedly until
"Do you want to delete this
module?"
is displayed.
4
Select
YES
by turning the rotary button and press to confirm.
MCA 15 - MCA 25 MCA 25/28 MI
8. Troubleshooting
29/04/2010 - 300022146-001-B
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