DE DIETRICH INNOVENS MCA 35 User Manual
Page 39
Code Faults
Cause
of the
fault
Description
Checking / solution
D27
PCU COM. FAIL
SCU
Communication failure between the SCU and PCU PCBs
4
Contact the professional who takes care of maintenance of the appliance
D29
IOBL.3WV B DEF
SCU
Communication failure between the
SCU PCB and the V3V module
The V3V module is switched off
The V3V module and the SCU PCB are not
connected to the same live terminal
The V3V module has been removed
4
Contact the professional who takes care of
maintenance of the appliance
D30
IOBL.3WV C DEF
SCU
Communication failure between the
SCU PCB and the V3V module
The V3V module is switched off
The V3V module and the SCU PCB are not
connected to the same live terminal
The V3V module has been removed
4
Contact the professional who takes care of
maintenance of the appliance
D31
COM.IOBL FAIL.
SCU
The IOBL function is no longer
active
Problem on the SCU PCB
4
Contact the professional who takes care of
maintenance of the appliance
D32
5 RESET:ON/OFF
SCU
5 resets done in less than an hour
4
Switch the boiler off and switch back on
4
If the boiler does not start after several resets (5 attempts possible), contact your
heating engineer and inform him of the error message displayed
D37
TA-S SHORT-CIR
SCU
The Titan Active System® is short-circuited
4
Contact the professional who takes care of maintenance of the appliance
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 TAS
simulation connector (delivered with package AD212) is fitted to the sensor card.
D38
TA-S DISCONNEC
SCU
The Titan Active System® is on an open circuit
4
Contact the professional who takes care of maintenance of the appliance
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 TAS
simulation connector (delivered with package AD212) is fitted to the sensor card.
MCA 35
6. Troubleshooting
24/08/2011 - 300024162-001-B
38