DeDietrich Innovens MCA 25 BIC User Manual page 40

6. Troubleshooting
Code Faults
D15 ST.TANK S.FAIL
D16 SWIM.P.B. S.FAIL
D16 SWIM.P.C. S.FAIL
D17 DHW 2 S.FAIL
D27 PCU COM. FAIL
D32 5 RESET:ON/OFF
D37 TA-S SHORT-CIR
D38 TA-S DISCONNEC
D99 DEF.BAD PCU
39
Cause Description
of the
fault
SCU Storage tank sensor fault
Note:
The hot water storage tank reheating
operation is no longer assured.
SCU Swimming pool sensor fault circuit B
Swimming pool sensor fault circuit C
Note:
Swimming pool reheating is always
done during the circuit's comfort
period.
SCU Sensor fault tank 2
SCU Communication failure between the SCU and PCU PCBs
Contact the professional who takes care of maintenance of the appliance
4
SCU 5 resets done in less than an hour
Switch the boiler off and switch back on
4
If the boiler does not start after several resets (5 attempts possible), contact your
4
heating engineer and inform him of the error message displayed
SCU The Titan Active System® is short-circuited
Contact the professional who takes care of maintenance of the appliance
4
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.
SCU The Titan Active System® is on an open circuit
Contact the professional who takes care of maintenance of the appliance
4
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.
SCU The SCU software version does not recognise the PCU connected
Contact the professional who takes care of maintenance of the appliance
4
Checking / solution
Bad connection
Sensor fault
Contact the professional who takes care of
4
maintenance of the appliance
Bad connection
Sensor fault
Contact the professional who takes care of
4
maintenance of the appliance
Bad connection
Sensor fault
Contact the professional who takes care of
4
maintenance of the appliance
15/06/12 - 300022162-001-01
MCA 25/28 BIC